Abrégé

A side channel compressor for compressing a gas comprises a housing (3) and at least one impeller (2) which is arranged in the housing (3) and can be driven in rotation about a central axis (4). In addition, the side channel compressor has at least one seal assembly (38) which is arranged in the housing (3) and has at least one sealing device (47) which seals at least one gap (59) between the housing (3) and the at least one impeller (2) and forces said impeller (2) radially outward with respect to the central axis (4) in order to keep the at least one gap (59) small. The at least one seal assembly (38) also comprises at least one sealing-device-holding device (46) which holds the at least one sealing device (47) in an axially secured fashion with respect to the central axis (4) and has at least one main holding body (48).

Classes IPC  ?

• F04D 29/08 - Joints d'étanchéité
• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F16J 15/3212 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par joints élastiques, p. ex. joints toriques avec au moins une lèvre pourvue d’éléments de tension, p. ex. de bagues élastiques avec des ressorts métalliques

Abrégé

A cooling arrangement for an at least two-stage compressed air generator comprises an intercooler arranged between a first and a second compressor stage, an aftercooler arranged after the second compressor stage, and a subassembly cooler, which absorbs heat from further subassemblies of the compressed air generator. A coolant circuit comprises a main cooler, the cold side supplying a cooled coolant parallel to the respective coolant inlet of the intercooler, of the aftercooler and of the subassembly cooler, and the hot side receiving the heated coolant exiting in parallel at the respective coolant outlet of the intercooler and of the aftercooler. The coolant outlet of the subassembly cooler is connected to a feed inlet of the intercooler and/or of the aftercooler.

Classes IPC  ?

• F04B 39/06 - RefroidissementChauffagePrévention du gel
• F04B 41/06 - Combinaisons de plusieurs pompes
• F04B 53/08 - RefroidissementChauffagePrévention du gel
• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 23/00 - Combinaisons de plusieurs pompes, chacune étant du type à piston rotatif ou oscillant spécialement adaptées pour les fluides compressiblesInstallations de pompage spécialement adaptées pour les fluides compressiblesPompes multiétagées spécialement adaptées pour les fluides compressibles
• F04C 29/04 - ChauffageRefroidissementIsolation thermique

Abrégé

The invention relates to a side-channel machine having a housing (4a), located in the housing (4a) a side-channel (28) for guiding a gas, and at least one gas inlet opening (34) which is formed in the housing (4a) and is fluidically connected to the side-channel (28). Furthermore, the side-channel machine has at least one gas inlet pipe (29a) which connects to the at least one gas inlet opening (34), The side-channel machine further comprises at least one gas outlet opening (33) and at least one gas outlet pipe (31a) which connects to the at least one gas outlet opening (33). Furthermore, the side-channel machine has an impeller that can be made to rotate in the housing (4a), with impeller blades, which bound impeller cells arranged in the side-channel (28), for delivering the gas in the impeller cells from the at least one gas inlet opening (34) to the at least one gas outlet opening (33). The side-channel machine further has at least one interrupter (39) arranged between the at least one gas inlet opening (34) and the at least one gas outlet opening (33).

Classes IPC  ?

• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 5/00 - Pompes avec flux circonférentiel ou transversal
• F04D 29/16 - Joints d'étanchéité entre le côté du refoulement et celui de l'aspiration
• F04D 29/18 - Rotors
• F04D 29/40 - Carters d'enveloppeTubulures pour le fluide énergétique
• F04D 29/66 - Lutte contre la cavitation, les tourbillons, le bruit, les vibrations ou phénomènes analoguesÉquilibrage

Abrégé

The invention relates to a method for controlling a rotary screw compressor, having at least a first and a second air-end, wherein both air-ends are driven separately from one another and speed controlled. According to the invention, the following steps are carried out: detection of a volume flow taken at the outlet of the second air-end; adjustment of the rotational speed of both air-ends, when the removed volume flow fluctuates in a range between a maximum value and a minimum value; opening of a pressure-relief valve, if the volume flow falls below the minimum value; and reduction of the rotational speed of at least the first air-end to a predetermined idling speed (V1.sub.L) to reduce the volumetric flow delivered by the first to the second air-end.

Classes IPC  ?

• F04C 28/08 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles caractérisées par une variation de la vitesse de rotation
• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 23/00 - Combinaisons de plusieurs pompes, chacune étant du type à piston rotatif ou oscillant spécialement adaptées pour les fluides compressiblesInstallations de pompage spécialement adaptées pour les fluides compressiblesPompes multiétagées spécialement adaptées pour les fluides compressibles
• F04C 28/02 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles spécialement adaptées pour plusieurs pompes connectées en série ou en parallèle
• F04C 28/06 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles spécialement adaptées pour arrêter, pour démarrer, pour le ralenti ou pour un fonctionnement à charge nulle
• F04C 28/24 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles caractérisées par l'utilisation des soupapes pour commander la pression ou le débit, p. ex. soupapes de décharge

Abrégé

A screw compressor for compressing a medium, having a drive unit which has a drive, and having a compressor unit which has two mutually engaging rotors with screw profiles, which are complementary to one another, and a compressor housing having an inlet and an outlet. The rotors are coupled to the drive unit via a shaft in each case. The shafts are only mounted on the drive side of the rotors. The rotors are mounted only on one side relative to their axial direction and are not mounted on the side which faces axially away from the drive.

Classes IPC  ?

• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 2/16 - Machines ou pompes à piston rotatif du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 23/00 - Combinaisons de plusieurs pompes, chacune étant du type à piston rotatif ou oscillant spécialement adaptées pour les fluides compressiblesInstallations de pompage spécialement adaptées pour les fluides compressiblesPompes multiétagées spécialement adaptées pour les fluides compressibles
• F04C 29/04 - ChauffageRefroidissementIsolation thermique

Abrégé

A side channel compressor for compressing a gas includes a housing and at least one impeller which is arranged in the housing and configured to bedriven in rotation about a central axis. In addition, the side channel compressor includes at least one seal assembly arranged in the housing and including at least one sealing device configured to seal at least one gap between the housing and the at least one impeller and be forced radially outward with respect to the central axis in order to keep the at least one gap small. The at least one seal assembly also includes at least one sealing-device-holding device configured to hold the at least one sealing device in an axially secured fashion with respect to the central axis and which includes at least one main holding body.

Classes IPC  ?

• F04D 29/08 - Joints d'étanchéité
• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F16J 15/3212 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par joints élastiques, p. ex. joints toriques avec au moins une lèvre pourvue d’éléments de tension, p. ex. de bagues élastiques avec des ressorts métalliques

Abrégé

A cooling arrangement for an at least two-stage compressed air generator comprises an intercooler arranged between a first and a second compressor stage, an aftercooler arranged after the second compressor stage, and a subassembly cooler, which absorbs heat from further subassemblies of the compressed air generator. A coolant circuit comprises a main cooler, the cold side supplying a cooled coolant parallel to the respective coolant inlet of the intercooler, of the aftercooler and of the subassembly cooler, and the hot side receiving the heated coolant exiting in parallel at the respective coolant outlet of the intercooler and of the aftercooler. The coolant outlet of the subassembly cooler is connected to a feed inlet of the intercooler and/or of the aftercooler.

Classes IPC  ?

• F04B 39/06 - RefroidissementChauffagePrévention du gel
• F04B 41/06 - Combinaisons de plusieurs pompes
• F04B 53/08 - RefroidissementChauffagePrévention du gel
• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 23/00 - Combinaisons de plusieurs pompes, chacune étant du type à piston rotatif ou oscillant spécialement adaptées pour les fluides compressiblesInstallations de pompage spécialement adaptées pour les fluides compressiblesPompes multiétagées spécialement adaptées pour les fluides compressibles
• F04C 29/04 - ChauffageRefroidissementIsolation thermique

Abrégé

L) to reduce the volumetric flow delivered by the first to the second air-end.

Classes IPC  ?

• F04C 28/08 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles caractérisées par une variation de la vitesse de rotation
• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 23/00 - Combinaisons de plusieurs pompes, chacune étant du type à piston rotatif ou oscillant spécialement adaptées pour les fluides compressiblesInstallations de pompage spécialement adaptées pour les fluides compressiblesPompes multiétagées spécialement adaptées pour les fluides compressibles
• F04C 28/02 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles spécialement adaptées pour plusieurs pompes connectées en série ou en parallèle
• F04C 28/06 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles spécialement adaptées pour arrêter, pour démarrer, pour le ralenti ou pour un fonctionnement à charge nulle
• F04C 28/24 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles caractérisées par l'utilisation des soupapes pour commander la pression ou le débit, p. ex. soupapes de décharge

Abrégé

a), with impeller blades, which bound impeller cells arranged in the side-channel (28), for delivering the gas in the impeller cells from the at least one gas inlet opening (34) to the at least one gas outlet opening (33). The side-channel machine further has at least one interrupter (39) arranged between the at least one gas inlet opening (34) and the at least one gas outlet opening (33).

Classes IPC  ?

• F04D 29/16 - Joints d'étanchéité entre le côté du refoulement et celui de l'aspiration
• F04D 5/00 - Pompes avec flux circonférentiel ou transversal
• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 29/18 - Rotors
• F04D 29/40 - Carters d'enveloppeTubulures pour le fluide énergétique
• F04D 29/66 - Lutte contre la cavitation, les tourbillons, le bruit, les vibrations ou phénomènes analoguesÉquilibrage

Abrégé

The invention relates to a screw compressor for compressing a medium, having a drive unit which has a drive, and having a compressor unit which has two mutually engaging rotors with screw profiles, which are complementary to one another, and a compressor housing having an inlet and an outlet. The rotors are coupled to the drive unit via a shaft in each case. The shafts are only mounted on the drive side of the rotors. The rotors are mounted only on one side relative to their axial direction and are not mounted on the side which faces axially away from the drive. The invention furthermore relates to a screw compressor arrangement with screw compressors which are fluidically connected in series.

Classes IPC  ?

• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 2/16 - Machines ou pompes à piston rotatif du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 23/00 - Combinaisons de plusieurs pompes, chacune étant du type à piston rotatif ou oscillant spécialement adaptées pour les fluides compressiblesInstallations de pompage spécialement adaptées pour les fluides compressiblesPompes multiétagées spécialement adaptées pour les fluides compressibles
• F04C 29/04 - ChauffageRefroidissementIsolation thermique

Abrégé

A side channel compressor for compressing a gas includes a housing and at least one impeller which is arranged in the housing and configured to be driven in rotation about a central axis. In addition, the side channel compressor includes at least one seal assembly arranged in the housing and including at least one sealing device configured to seal at least one gap between the housing and the at least one impeller and be forced radially outward with respect to the central axis in order to keep the at least one gap small. The at least one seal assembly also includes at least one sealing-device-holding device configured to hold the at least one sealing device in an axially secured fashion with respect to the central axis and which includes at least one main holding body.

Classes IPC  ?

• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 29/08 - Joints d'étanchéité
• F16J 15/3212 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par joints élastiques, p. ex. joints toriques avec au moins une lèvre pourvue d’éléments de tension, p. ex. de bagues élastiques avec des ressorts métalliques

Abrégé

a), with impeller blades, which bound impeller cells arranged in the side-channel (28), for delivering the gas in the impeller cells from the at least one gas inlet opening (34) to the at least one gas outlet opening (33). The side-channel machine further has at least one interrupter (39) arranged between the at least one gas inlet opening (34) and the at least one gas outlet opening (33).

Classes IPC  ?

• F04D 5/00 - Pompes avec flux circonférentiel ou transversal
• F04D 29/66 - Lutte contre la cavitation, les tourbillons, le bruit, les vibrations ou phénomènes analoguesÉquilibrage
• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 29/16 - Joints d'étanchéité entre le côté du refoulement et celui de l'aspiration
• F04D 29/18 - Rotors
• F04D 29/40 - Carters d'enveloppeTubulures pour le fluide énergétique

Abrégé

A cooling arrangement for an at least two-stage compressed air generator. The cooling arrangement comprises an intercooler arranged between a first and a second compressor stage, an aftercooler arranged after the second compressor stage, and a subassembly cooler, which absorbs heat from further subassemblies of the compressed air generator. A coolant circuit comprises a main cooler, the cold side supplying a cooled coolant parallel to the respective coolant inlet of the intercooler, of the aftercooler and of the subassembly cooler, and the hot side receiving the heated coolant exiting in parallel at the respective coolant outlet of the intercooler and of the aftercooler. The coolant outlet of the subassembly cooler is connected to a feed inlet of the intercooler and/or of the aftercooler.

Classes IPC  ?

• F04B 39/06 - RefroidissementChauffagePrévention du gel
• F04B 41/06 - Combinaisons de plusieurs pompes
• F04B 53/08 - RefroidissementChauffagePrévention du gel
• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 23/00 - Combinaisons de plusieurs pompes, chacune étant du type à piston rotatif ou oscillant spécialement adaptées pour les fluides compressiblesInstallations de pompage spécialement adaptées pour les fluides compressiblesPompes multiétagées spécialement adaptées pour les fluides compressibles
• F04C 29/04 - ChauffageRefroidissementIsolation thermique

Abrégé

L) to reduce the volumetric flow delivered by the first to the second air-end.

Classes IPC  ?

• F04C 28/08 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles caractérisées par une variation de la vitesse de rotation
• F04C 28/24 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles caractérisées par l'utilisation des soupapes pour commander la pression ou le débit, p. ex. soupapes de décharge
• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 23/00 - Combinaisons de plusieurs pompes, chacune étant du type à piston rotatif ou oscillant spécialement adaptées pour les fluides compressiblesInstallations de pompage spécialement adaptées pour les fluides compressiblesPompes multiétagées spécialement adaptées pour les fluides compressibles
• F04C 28/06 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles spécialement adaptées pour arrêter, pour démarrer, pour le ralenti ou pour un fonctionnement à charge nulle
• F04C 28/02 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles spécialement adaptées pour plusieurs pompes connectées en série ou en parallèle

Abrégé

The invention relates to a screw compressor for compressing a medium, having a drive unit (01), which has a drive (06, 07), and having a compressor unit (03), which has two intermeshing rotors (21, 22) with mutually complementary screw profiles, and a compressor housing (19) with an inlet (24) and an outlet (23). The rotors (21, 22) are coupled to the drive unit via one shaft (10, 14) each. The shafts (10, 14) are mounted only on the drive side of the rotors (21, 22). The rotors (21, 22) are mounted only on one side with respect to their axial direction and are not mounted on their side which is axially remote from the drive (06, 07). The invention also relates to a screw compressor assembly having screw compressors flow-connected in series.

Classes IPC  ?

• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 23/00 - Combinaisons de plusieurs pompes, chacune étant du type à piston rotatif ou oscillant spécialement adaptées pour les fluides compressiblesInstallations de pompage spécialement adaptées pour les fluides compressiblesPompes multiétagées spécialement adaptées pour les fluides compressibles
• F04C 29/04 - ChauffageRefroidissementIsolation thermique

Abrégé

a), with impeller blades, which bound impeller cells arranged in the side-channel (28), for delivering the gas in the impeller cells from the at least one gas inlet opening (34) to the at least one gas outlet opening (33). The side-channel machine further has at least one interrupter (39) arranged between the at least one gas inlet opening (34) and the at least one gas outlet opening (33).

Classes IPC  ?

• F04D 5/00 - Pompes avec flux circonférentiel ou transversal
• F04D 29/66 - Lutte contre la cavitation, les tourbillons, le bruit, les vibrations ou phénomènes analoguesÉquilibrage
• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 29/16 - Joints d'étanchéité entre le côté du refoulement et celui de l'aspiration
• F04D 29/18 - Rotors
• F04D 29/40 - Carters d'enveloppeTubulures pour le fluide énergétique

Abrégé

A side channel compressor for compressing a gas includes a housing and at least one impeller arranged in the housing and configured to be driven in rotation about a central axis. In addition, the side channel compressor includes at least one seal assembly arranged in the housing and including at least one sealing device configured to seal at least one gap between the housing and the at least one impeller and be forced radially outward with respect to the central axis in order to keep the at least one gap small. The at least one seal assembly also includes at least one sealing-device-holding device configured to hold the at least one sealing device in an axially secured fashion with respect to the central axis and which includes at least one main holding body.

Classes IPC  ?

• F04D 29/08 - Joints d'étanchéité
• F04D 29/42 - Carters d'enveloppeTubulures pour le fluide énergétique pour pompes radiales ou hélicocentrifuges
• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F16J 15/3212 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par joints élastiques, p. ex. joints toriques avec au moins une lèvre pourvue d’éléments de tension, p. ex. de bagues élastiques avec des ressorts métalliques

Abrégé

The invention relates to a cooling arrangement for an at least two-stage compressed air generator (01). The cooling arrangement comprises an intercooler (04) which is located between a first and a second compressor stage (02, 03), an aftercooler (05) which is located downstream of the second compressor stage (03), and a component cooler (08) which receives heat from additional components of the compressed air generator (01). A coolant circuit comprises a main cooler (07), the cold side of which supplies a cooled coolant at a low temperature to the coolant inlet of the intercooler (04), to the coolant inlet of the aftercooler (05), and to the coolant inlet of the component cooler (08) in parallel, and the hot side of which receives, at a high temperature, the heated coolant which exits at the coolant outlet of the intercooler (04) and at the coolant outlet of the aftercooler (05) in parallel. The coolant outlet of the component cooler (08) is connected to a feed inlet (12) of the intercooler (04) and/or of the aftercooler (05). The feed inlet (12) is located between the coolant inlet and the coolant outlet at a position at which the intermediate temperature of the coolant in the intercooler (04) and in the aftercooler (05) corresponds to the outlet temperature of the coolant at the component cooler (08) ±20%. The invention also relates to a method for cooling an at least two-stage compressed air generator.

Classes IPC  ?

• F04B 39/06 - RefroidissementChauffagePrévention du gel
• F04B 53/08 - RefroidissementChauffagePrévention du gel

Abrégé

A mixing valve arrangement for a hydraulic system is provided with a medium cavity, in which a mixing cylinder, a first and a second inlet chamber as well as an outlet are provided. A mixing piston is axially mounted and movable in the mixing cylinder, provided with a flow path with an inlet opening, a variable cross-section of said inlet opening culminating into the first and/or the second inlet chamber, according to the axial position of the mixing piston, and with an outlet opening culminating in the outlet of the mixing cylinder. A thrust rod is axially mounted and movable and connected to the mixing piston, to change the axial position thereof. A drive is connected as an actuator to the thrust rod, for the axial movement of the same. The drive is an electrical motor, which is completely arranged inside the medium cavity.

Classes IPC  ?

• G05D 23/13 - Commande de la température sans source d'énergie auxiliaire en faisant varier le rapport du mélange de deux fluides ayant des températures différentes
• F16N 39/02 - Dispositions pour conditionner des lubrifiants dans les circuits de lubrification par refroidissement
• F16N 39/04 - Dispositions pour conditionner des lubrifiants dans les circuits de lubrification par chauffage
• F04B 53/18 - Lubrification
• F04B 1/2035 - Corps de cylindre
• F04B 39/06 - RefroidissementChauffagePrévention du gel

Abrégé

The invention is related to a pulsation muffler (100) for a gaseous medium flow (107), which is supplied by a compressor. The pulsation muffler (100) comprises a housing (101) extending along a central axis with a medium flow inlet (106) and a medium flow outlet; several tubular absorber elements (108) concentrically arranged in the housing (10) and fluidically arranged one behind the other. Each tubular absorber element (108) is provided with an inlet area and an outlet area, positioned at an axial distance from each other. Between the respective radially adjacent wall sections of different absorber elements (108), a flow compartment (112, 114) is maintained for the medium flow (107).

Classes IPC  ?

• F04C 29/06 - Étouffement du bruit
• F01N 1/08 - Silencieux caractérisés par leur principe de fonctionnement réduisant l'énergie des gaz évacués par étranglement ou tourbillon
• F04C 29/00 - Parties constitutives, détails ou accessoires de pompes ou d'installations de pompage spécialement adaptées pour les fluides compressibles non couverts dans les groupes
• F01N 1/24 - Silencieux caractérisés par leur principe de fonctionnement par utilisation des matériaux absorbant le son
• F02M 35/12 - Silencieux d'admission
• F04B 39/00 - Parties constitutives, détails ou accessoires de pompes ou de systèmes de pompage spécialement adaptés aux fluides compressibles, non prévus dans les groupes ou présentant un intérêt autre que celui visé par ces groupes

Abrégé

A compressor system (01) with a system housing (02), in which are arranged heat generating system components (06) comprising at least one compressor stage (201) for compressing a gaseous medium, an air water cooler (12), a blower (15) which generates a cooling air flow (16), and air conducting elements. A cooling air channel (07) is configured which has an inlet opening (08) in the upper section of the system housing (02) and an outlet opening (09) in the lower section of the system housing (02), wherein upper air conducting elements (13) are positioned in order to conduct the cooling air flow (16) after flowing through the air water cooler (12) to the inlet opening (08), and lower air conducting elements (17) are positioned in order to conduct the cooling air flow (16) from the outlet opening (09) to the system components (06).

Classes IPC  ?

• F04C 29/04 - ChauffageRefroidissementIsolation thermique
• F04C 29/12 - Dispositions pour l'admission ou l'échappement du fluide de travail, p. ex. caractéristiques de structure de l'admission ou de l'échappement
• F01C 21/00 - Parties constitutives, détails ou accessoires non couverts dans les groupes
• F04C 28/08 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles caractérisées par une variation de la vitesse de rotation
• F04C 29/06 - Étouffement du bruit
• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis

Abrégé

L) to reduce the volumetric flow delivered by the first to the second air-end.

Classes IPC  ?

• F04C 28/08 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles caractérisées par une variation de la vitesse de rotation
• F04C 28/24 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles caractérisées par l'utilisation des soupapes pour commander la pression ou le débit, p. ex. soupapes de décharge
• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 23/00 - Combinaisons de plusieurs pompes, chacune étant du type à piston rotatif ou oscillant spécialement adaptées pour les fluides compressiblesInstallations de pompage spécialement adaptées pour les fluides compressiblesPompes multiétagées spécialement adaptées pour les fluides compressibles
• F04C 28/06 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles spécialement adaptées pour arrêter, pour démarrer, pour le ralenti ou pour un fonctionnement à charge nulle
• F04C 28/02 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles spécialement adaptées pour plusieurs pompes connectées en série ou en parallèle

Abrégé

The present invention relates primarily to a method for controlling the rotational rate of a compressor, which controls, in particular, the rotational rate of a rotating compression element of the compressor. The invention furthermore relates to a compressor, e.g. a compressor for generating pressurized air. The compressor is to be operated at a rotational rate, when in operation, with a mean value that is at least as high as a minimum mean value, in order to ensure the functionality of the compressor. According to the method, a temporally variable target rotational rate of the compressor that is necessary for obtaining a temporally variable output performance from a compressor is determined. In accordance with the invention, a lower rotational rate limit is raised if the temporal mean of the variable target rotational rate is lower than the minimal mean value for the rotational rate of the compressor.

Classes IPC  ?

• F04C 28/08 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles caractérisées par une variation de la vitesse de rotation
• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis
• F04C 29/02 - LubrificationSéparation du lubrifiant

Abrégé

The invention relates to a side-channel machine having a housing, located in the housing a side-channel for guiding a gas, and at least one gas inlet opening which is formed in the housing and is fluidically connected to the side-channel. Furthermore, the side-channel machine has at least one gas inlet pipe which connects to the at least one gas inlet opening. The side-channel machine further comprises at least one gas outlet opening and at least one gas outlet pipe which connects to the at least one gas outlet opening. Furthermore, the side-channel machine has an impeller that can be made to rotate in the housing, with impeller blades, which bound impeller cells arranged in the side-channel, for delivering the gas in the impeller cells from the at least one gas inlet opening to the at least one gas outlet opening. The side-channel machine further has at least one interrupter arranged between the at least one gas inlet opening and the at least one gas outlet opening.

Classes IPC  ?

• F04D 5/00 - Pompes avec flux circonférentiel ou transversal
• F04D 29/66 - Lutte contre la cavitation, les tourbillons, le bruit, les vibrations ou phénomènes analoguesÉquilibrage
• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 29/16 - Joints d'étanchéité entre le côté du refoulement et celui de l'aspiration
• F04D 29/18 - Rotors
• F04D 29/40 - Carters d'enveloppeTubulures pour le fluide énergétique

Abrégé

The invention relates to a side channel compressor for sealing a gas, comprising a housing (3) and at least one impeller (2), which is arranged in the housing and can be rotationally driven about a central axis (4). The side channel compressor further comprises at least one seal assembly (38) arranged in the housing (3) having at least one sealing device (47), which seals at least one gap (59) between the housing (3) and the at least one impeller (2) and forces the same radially outwards with respect to the central axis (4) in order to keep the at least one gap (59) small. The at least one seal assembly (38) further comprises at least one sealing device holding unit (46), which axially fixes the at least one sealing device (47) in place with respect to the central axis (4) and is provided with at least one holding main body (48).

Classes IPC  ?

• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 29/08 - Joints d'étanchéité
• F04D 29/62 - MontageAssemblageDémontage des pompes radiales ou hélicocentrifuges
• F16J 15/24 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour garnitures élastiques ou plastiques la garniture étant comprimée radialement ou tangentiellement
• F16J 15/3212 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par joints élastiques, p. ex. joints toriques avec au moins une lèvre pourvue d’éléments de tension, p. ex. de bagues élastiques avec des ressorts métalliques
• F16J 15/3268 - Montage des bagues d’étanchéité

Abrégé

The invention relates to a compressor system for generating compressed air. It comprises a drive, a driven compressor, a lubricant cooler, a compressed air cooler and a blower unit. The blower unit has at least two blowers that can be controlled independent of one another, which convey cooling air to first and second cooling chambers that are separated from one another, wherein the first cooling chamber conveys the cooling air to the lubricant cooler, and the second cooling chamber conveys the cooling air to the compressed air cooler. The lubricant cooler and the compressed air cooler have an arrangement that is offset to one another in such a way that the axes of their inflow and outflow flanges, arranged on their lateral walls, are located in different planes. The invention also relates to a method for operating a compressor system that generates compressed air, wherein at least two control signals that are independent of one another are provided for two blowers.

Classes IPC  ?

• F04B 39/06 - RefroidissementChauffagePrévention du gel
• F04C 29/12 - Dispositions pour l'admission ou l'échappement du fluide de travail, p. ex. caractéristiques de structure de l'admission ou de l'échappement
• F01C 21/00 - Parties constitutives, détails ou accessoires non couverts dans les groupes
• F04B 41/06 - Combinaisons de plusieurs pompes

Abrégé

The invention relates to a compressor arrangement for compressing a gas. The compressor arrangement comprises a drive unit (3) with a driveshaft (4) that can be driven in rotation and at least one compressor (1) which comprises a compressor casing (2), at least one gas inlet opening (21) formed in the compressor casing (2) and at least one gas outlet opening formed in the compressor casing (2) and fluidically connected to the at least one gas inlet opening (21). The compressor (2) also has at least one impeller (6), which is arranged in the compressor casing (2), is connected in fixed rotation with the driveshaft (4) and can be driven in rotation, for delivering the gas from the at least one gas inlet opening (21) to the at least one gas outlet opening, and has at least one bearing device (38) for bearing the at least one impeller (6), wherein the at least one bearing device (38) is arranged on the compressor casing (2) and on the at least one impeller (6).

Classes IPC  ?

• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 25/02 - Ensembles comprenant des pompes et leurs moyens d'entraînement
• F04D 29/059 - Paliers à roulements
• F04D 29/26 - Rotors spécialement adaptés aux fluides compressibles

Produits et services

Oil-free compressors; parts and accessories for oil-free compressors.

Abrégé

The invention relates to a side-channel machine having a housing (4a), located in the housing (4a) a side-channel (28) for guiding a gas, and at least one gas inlet opening (34) which is formed in the housing (4a) and is fluidically connected to the side-channel (28). Furthermore, the side-channel machine has at least one gas inlet pipe (29a) which connects to the at least one gas inlet opening (34). The side-channel machine further comprises at least one gas outlet opening (33) and at least one gas outlet pipe (31a) which connects to the at least one gas outlet opening (33). Furthermore, the side-channel machine has an impeller that can be made to rotate in the housing (4a), with impeller blades, which bound impeller cells arranged in the side-channel (28), for delivering the gas in the impeller cells from the at least one gas inlet opening (34) to the at least one gas outlet opening (33). The side-channel machine further has at least one interrupter (39) arranged between the at least one gas inlet opening (34) and the at least one gas outlet opening (33).

Classes IPC  ?

• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 29/16 - Joints d'étanchéité entre le côté du refoulement et celui de l'aspiration
• F04D 17/16 - Pompes centrifuges pour déplacement sans compression notable

Abrégé

The invention first relates to a method for controlling the rotational speed of a compressor, wherein the method is used in particular to control the rotational speed of a rotating compression element of the compressor. The invention further relates to a compressor, for example a compressor for generating compressed air. During operation, the compressor is to be operated at a rotational speed which has an average value that is at least as large as a minimum average value in order to ensure the function of the compressor. According to the method, a compressor target rotational speed which can change over time is determined, said target rotational speed being necessary for an output which is to be achieved by the compressor and which can be change over time. A time average of the target rotational speed which can change over time is determined. According to the invention, a lower rotational speed threshold is raised if the time average of the target rotational speed which can change over time is lower than the minimum average value of the rotational speed of the compressor.

Classes IPC  ?

• F04C 28/08 - Commande, surveillance ou dispositions de sécurité pour les pompes ou les installations de pompage spécialement adaptées pour les fluides compressibles caractérisées par une variation de la vitesse de rotation
• F04C 18/16 - Pompes à piston rotatif spécialement adaptées pour les fluides compressibles du type à engrènement extérieur, c.-à-d. avec un engagement des organes coopérants semblable à celui d'engrenages dentés d'un autre type qu'à axe interne avec des pistons rotatifs dentés à dents hélicoïdales, p. ex. du type ayant la forme d'un chevron, du type à vis

Produits et services

Oil-free compressors; parts and accessories for oil-free compressors.

Abrégé

The invention relates to a compressor system for generating compressed air. It comprises a drive (01), a driven compressor (02), a lubricant cooler (09), a compressed air cooler (12) and a blower unit. The blower unit has at least two blowers (06, 07) that can be controlled independent of one another, which convey cooling air to first and second cooling chambers (08, 11) that are separated from one another, wherein the first cooling chamber (08) conveys the cooling air to the lubricant cooler (09), and the second cooling chamber (11) conveys the cooling air to the compressed air cooler (12). The lubricant cooler (09) and the compressed air cooler (12) have an arrangement that is offset to one another in such a way that the axes of their inflow and outflow flanges (13), arranged on their lateral walls, are located in different planes. The invention also relates to a method for operating a compressor system that generates compressed air, wherein at least two control signals that are independent of one another are provided for two blowers (06, 07).

Classes IPC  ?

• F04B 39/06 - RefroidissementChauffagePrévention du gel

Abrégé

The present invention initially relates to a method for operating a compressor for compressing air which is driven by an internal combustion engine (01). The invention furthermore relates to a compressor which is suitable for carrying out the method according to the invention. A first turbocharger (07) is arranged in an exhaust gas flow (06) of the internal combustion engine (01) for guiding pre-compressed air to the internal combustion engine (01). In addition, a second turbocharger (08) is arranged in the exhaust gas flow (06) of the internal combustion engine (01) for pre-compressing the air to be compressed by the compressor. The method according to the invention initially comprises a step in which a pressure of the pre-compressed air, which is generated by the first turbocharger (07), is monitored during an operating state of the compressor. In a further method step, the operating state is ended as soon as the monitored pressure falls below a previously determined value.

Classes IPC  ?

• F02B 37/00 - Moteurs caractérisés par l'utilisation de pompes entraînées au moins temporairement par les gaz d'échappement
• F02B 39/16 - Autres mesures de sécurité pour les pompes ou autres commandes de celles-ci
• F02B 63/06 - Adaptations des moteurs pour entraîner des pompes, des outils tenus à la main ou des génératrices électriquesCombinaisons portatives de moteurs avec des dispositifs entraînés par des moteurs pour pompes
• F04D 25/16 - Combinaisons de plusieurs pompes
• F02D 29/04 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs particulière aux moteurs entraînant des pompes

Abrégé

The invention relates to a method for controlling the water supply of a water-injected compressor, into the cooling water circuit of which is injected demineralized and non-demineralized water as fresh water. The method according to the invention is characterized in that the fresh water supplied is a mixture of demineralized and non-demineralized water, and the proportions of the demineralized and non-demineralized water in the fresh water are dependent on the conductivity of the demineralized and non-demineralized water. The invention also relates to a water-injected gas compressor that may be operated with such a method.

Classes IPC  ?

• G05D 11/08 - Commande du rapport des débits de plusieurs matériaux fluides ou fluents avec source d'énergie auxiliaire non électrique en déterminant la concentration du mélange, p. ex. en déterminant la valeur du pH
• F04C 29/04 - ChauffageRefroidissementIsolation thermique
• F25B 31/00 - Aménagements des compresseurs
• F04C 28/28 - Dispositions de sécuritéSurveillance
• F04C 29/00 - Parties constitutives, détails ou accessoires de pompes ou d'installations de pompage spécialement adaptées pour les fluides compressibles non couverts dans les groupes
• C05F 5/00 - Engrais fabriqués à partir de déchets de distillerie ou de sucreries, de mélasses, vinasses ou de déchets ou résidus similaires

Abrégé

A side channel machine arrangement comprises a side channel machine (1) and a fluid connection device (2). The side channel machine (1) has a housing (5), side channels arranged in the housing (5) and fluid inlet openings (11) provided in said housing, which have a flow connection to the side channels to introduce a fluid to be conveyed into the side channels, at least one fluid outlet, which is provided on the housing (5) and has a flow connection to the side channels to discharge the fluid from the side channels, and an impeller that is mounted so that it can be rotatably driven in the housing (5). The fluid connection device (2) is used to connect the side channel machine (1) to a fluid supply line. It comprises a first fluid connection mechanism (3), which is provided on the housing (5) and has a flow connection to the fluid inlet openings (11), and a second fluid connection mechanism (4), which has a fluid inlet piece (29) for connection to the fluid supply line.

Classes IPC  ?

• F04D 5/00 - Pompes avec flux circonférentiel ou transversal
• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 29/42 - Carters d'enveloppeTubulures pour le fluide énergétique pour pompes radiales ou hélicocentrifuges

Abrégé

The invention relates to a control for heat recovery (WRG) in a compressor system with liquid injection comprising a fluid circuit of the fluid which is to be injected with control valve, this fluid passing through at least one heat exchanger with control valve to the WRG and upstream of the compressor (13) of the compressor system there being a compressor-side control valve (6) and downstream of the heat exchanger (9) of the WRG there being a WRG-side control valve (7), one electronic control unit (11) controlling at least one of these control valves (6 and/or 7) by means of an algorithm, and the required temperatures for the mass flows [4, 5] of the WRG being able to be input as parameters into the control unit [11].

Classes IPC  ?

• G05D 7/00 - Commande de débits
• F04B 39/06 - RefroidissementChauffagePrévention du gel
• F28D 15/00 - Appareils échangeurs de chaleur dans lesquels l'agent intermédiaire de transfert de chaleur en tubes fermés passe dans ou à travers les parois des canalisations
• F04B 49/06 - Commande utilisant l'électricité
• F04B 39/02 - Lubrification

Abrégé

A side channel machine arrangement comprises a side channel machine (1) and a fluid connection device (2). The side channel machine (1) has a housing (5), side channels arranged in the housing (5) and fluid inlet openings (11) provided in said housing, which have a flow connection to the side channels to introduce a fluid to be conveyed into the side channels, at least one fluid outlet, which is provided on the housing (5) and has a flow connection to the side channels to discharge the fluid from the side channels, and an impeller that is mounted so that it can be rotatably driven in the housing (5). The fluid connection device (2) is used to connect the side channel machine (1) to a fluid supply line. It comprises a first fluid connection mechanism (3), which is provided on the housing (5) and has a flow connection to the fluid inlet openings (11), and a second fluid connection mechanism (4), which has a fluid inlet piece (29) for connection to the fluid supply line.

Classes IPC  ?

• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles

Abrégé

The invention relates to improvements in compressors and, in particular, to improvements in a method of controlling centrifugal compressors to maximize their efficacy. The compressor has an impeller mounted on a shaft supported by an active magnetic bearing unit and is driven by a variable speed motor at a rotational speed under normal on-load conditions at a calculated pre-surge speed for the required delivery pressure. The actual rotational speed and delivery pressure of the compressor is repeatedly measured and recorded at high frequency. The compressor is allowed to surge periodically after a preset re-calibration time and the compressor is put into a surge recovery cycle when surge is detected, during which the compressor is off-loaded and the rotational speed reduced. The compressor pre-surge speed line is recalibrated during the surge recovery cycle for the current operating conditions and reloads the compressor when the shaft speed reaches the greater of the recalibrated presurge speed line or the load speed.

Classes IPC  ?

• F01B 25/06 - Éléments sensibles sensibles à la vitesse
• F04B 49/20 - Commande des "machines", pompes ou installations de pompage ou mesures de sécurité les concernant non prévues dans les groupes ou présentant un intérêt autre que celui visé par ces groupes en modifiant la vitesse d'entraînement
• F04B 49/06 - Commande utilisant l'électricité
• F04D 27/02 - Contrôle de l'emballement

Abrégé

The invention relates to an improved multi-stage centrifugal compressor (10) comprising at least four centrifugal compression stages (11,12,13,14), each including an impeller. The impellers of one pair of the stages (12,13) are mounted on a first shaft (23) coupled to a first high speed direct drive motor (16), and the impellers of another pair of the stages (11,14) are mounted on a second shaft (24) coupled to a second high speed direct drive motor (15). The speed of the first and second motors is controlled by at least one drive (25) such that the impellers are all driven at the same speed.

Classes IPC  ?

• F04B 35/00 - Pompes à piston spécialement adaptées aux fluides compressibles et caractérisées par les moyens d'entraînement de leurs organes de travail ou par leur combinaison avec les machines motrices ou moteurs qui les entraînent ou bien par leurs adaptations à cet effet, non prévues ailleurs
• F04B 41/00 - Installations ou systèmes de pompage spécialement adaptés aux fluides compressibles
• F04D 17/12 - Pompes multiétagées
• F04D 25/06 - Ensembles comprenant des pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité
• F04D 27/02 - Contrôle de l'emballement
• F04D 29/58 - RefroidissementChauffageRéduction du transfert de chaleur

Produits et services

Machines; side channel blowers.

Abrégé

Expansion turbine (1) for the expansion of gas, comprising a housing (7), a substantially annular side channel (13) located in the housing (7) for a gas to be expanded, at least one gas inlet opening (26) which is configured in the housing (7) and is in flow connection with the side channel (13) for introducing the gas to be expanded therein, at least one gas outlet opening (27) configured in the housing (7) to discharge the expanded gas from the side channel (13), the gas outlet opening (27) being in flow connection via the side channel (13) with the gas inlet opening (26), and a wheel (6) rotatably mounted in the housing (7) with at least one wheel blade (5) arranged in the side channel (13) to be driven by the gas flowing into the side channel (13).

Classes IPC  ?

• F01D 1/22 - "Machines" ou machines motrices à déplacement non positif, p. ex. turbines à vapeur sans moyens de guidage du fluide de travail traversées par le fluide de travail principalement dans le sens radial
• F01D 9/02 - InjecteursLogement des injecteursAubes de statorTuyères de guidage
• F01D 17/14 - Organes de commande terminaux disposés sur des parties du stator faisant varier l'aire effective de la section transversale des injecteurs ou tuyères de guidage

Abrégé

A side channel compressor for compressing a gas comprises a housing (3), a side channel (30), located in the housing (3) and having a cross-sectional area (A), for compressing a gas, a gas inlet opening (31) formed in the housing (3), the gas inlet opening (31) being in flow connection with the side channel (30) for introducing a gas, a gas outlet opening (32) formed in the housing (3) for discharging the gas to be compressed from the side channel (30), wherein the gas outlet opening (32) is in flow connection with the gas inlet opening (31) via the side channel (30), and an impeller (2) which is mounted for rotation in the housing (3) and comprises impeller blades (1) disposed in the side channel (30), wherein the cross-sectional area (A) of the side channel (30) decreases non-monotonically from the gas inlet opening (31) towards the gas outlet opening (32).

Classes IPC  ?

• F04D 29/42 - Carters d'enveloppeTubulures pour le fluide énergétique pour pompes radiales ou hélicocentrifuges

Abrégé

The invention relates to improvements in compressors and, in particular, to an improvement in a method of controlling variable speed dynamic compressors to avoid ‘motor overload as a result of choking.1 The invention therefore comprises a method of controlling a compressor to provide compressed gas at a target delivery pressure (Pt) and prevent excessive motor power consumption, the compressor being driven by a variable speed motor which has motor windings, wherein the gas inlet temperature (Tin), gas output delivery pressure (Pd), motor speed (Vm) and the motor winding temperature (Tmw) are continuously measured during operation of the compressor. The gas inlet temperature (Tin) is used to determine a predetermined maximum motor winding temperature (Tmwmax) limit. The maximum motor winding temperature (Tmwmax) is used (to set a maximum motor speed (Vmmax) limit. The maximum motor speed (Vmmax), target (Pt) and gas output delivery (Pd) pressures are used to control the actual motor speed (Vm) below the maximum motor speed limit (Vmmax).

Classes IPC  ?

• H02P 1/04 - Moyens de commande de la progression d'une séquence de démarrage en fonction du temps ou en fonction du courant, de la vitesse ou d'un autre paramètre du moteur

Abrégé

An electric machine comprising a stator having a stator winding, a housing accommodating the stator, a rotor, and an air gap having a generally cylindrical configuration. A plurality of circumferentially distributed, radial, first cooling gas ducts are provided in a stator core. Jets of cooling gas are directed to regions of an end winding which are relatively distant from the stator core, in order to achieve impingement cooling thereof. Flows of cooling gas are directed to portions of the end winding which are between the impingement cooled regions of the end winding and the respective front face of the stator core.

Classes IPC  ?

• F04B 39/06 - RefroidissementChauffagePrévention du gel

Abrégé

The invention relates to an improved multi-stage centrifugal compressor (10) comprising at least four centrifugal compression stages (11,12,13,14), each including an impeller. The impellers of one pair of the stages (12,13) are mounted on a first shaft (23) coupled to a first high speed direct drive motor (16), and the impellers of another pair of the stages (11,14) are mounted on a second shaft (24) coupled to a second high speed direct drive motor (15). The speed of the first and second motors is controlled by at least one drive (25) such that the impellers are all driven at the same speed.

Classes IPC  ?

• F04D 17/12 - Pompes multiétagées
• F04D 25/06 - Ensembles comprenant des pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité
• F04D 27/02 - Contrôle de l'emballement
• F04D 29/58 - RefroidissementChauffageRéduction du transfert de chaleur

Abrégé

The invention relates to improvements in compressor units, and in particular to a modular compressor unit which has separate sections for the compressor, the controls and the air intake. The modular compressor unit comprises three separate adjoining sections, being an intake section, a compression section and a control section. The intake section comprises air intake means which provide an inlet for ambient air to be compressed and for cooling the compressor motor and comprise filters to filter air entering the intake means, noise attenuation means provided in the air intake means, and means for directing air to components in the compression section. The compression section comprises a compressor, a motor arranged to drive all compressor and all components within the unit required to cool compressed air, the motor and to remove heat from the compression section. The control section houses all the control means for operating the compressor unit.

Classes IPC  ?

• F04B 17/03 - Pompes caractérisées par leur combinaison avec des machines motrices ou moteurs particuliers qui les entraînent ou par leur adaptation à ceux-ci entraînées par des moteurs électriques
• F04B 35/04 - Pompes à piston spécialement adaptées aux fluides compressibles et caractérisées par les moyens d'entraînement de leurs organes de travail ou par leur combinaison avec les machines motrices ou moteurs qui les entraînent ou bien par leurs adaptations à cet effet, non prévues ailleurs les moyens étant électriques

Abrégé

The disclosure relates to an industrial die cast component comprising a first side, a second side, said second side having a second side surface, an aperture opening at said second side and through said second side surface, said aperture having a respective first arcuate surface bounding a central portion of the aperture and said aperture having a respective second surface bounding a projecting portion of the aperture, said projecting portion having a closed end and an open end, said open end forming a gap in said first arcuate surface and said projecting portion closed end extending radially beyond said first arcuate surface, wherein said first arcuate surface is constructed to be engaged by a fastener.

Classes IPC  ?

• F16S 5/00 - Autres éléments de structure dont l'utilisation n'est pas limitée à une application qui soit entièrement couverte par une seule classe
• B22D 17/22 - Moules métalliquesPlaques de moulesSupports de moulesÉquipement de refroidissement des moulesAccessoires pour l'extraction et l'éjection des pièces hors du moule

Abrégé

The invention concerns a side channel compressor for compressing a gas, the side channel compressor comprising a housing (3), a side channel (30) located in the housing (3) for compressing a gas, a gas inlet opening which is formed in the housing (3) and is in flow connection with the side channel (30) for introducing a gas to be compressed, a gas outlet opening (32) formed in the housing (3) for discharging the gas to be compressed from the side channel (30), the gas outlet opening (32) being in flow connection with the gas inlet opening (31) by way of the side channel (30), and a impeller (2) mounted for rotary drive in the housing (3), the impeller (2) having at least two impeller blades (1) disposed in the side channel, wherein at least one impeller blade (1) has a flow recess in its free edge region (47).

Classes IPC  ?

• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 29/28 - Rotors spécialement adaptés aux fluides compressibles pour pompes centrifuges ou hélicocentrifuges
• F04D 29/66 - Lutte contre la cavitation, les tourbillons, le bruit, les vibrations ou phénomènes analoguesÉquilibrage

Abrégé

A side channel compressor for compressing a gas comprises a housing (3), a side channel (30), located in the housing (3) and having a cross-sectional area (A), for compressing a gas, a gas inlet opening (31) formed in the housing (3), the gas inlet opening (31) being in flow connection with the side channel (30) for introducing a gas, a gas outlet opening (32) formed in the housing (3) for discharging the gas to be compressed from the side channel (30), wherein the gas outlet opening (32) is in flow connection with the gas inlet opening (31) via the side channel (30), and an impeller (2) which is mounted for rotation in the housing (3) and comprises impeller blades (1) disposed in the side channel (30), wherein the cross-sectional area (A) of the side channel (30) decreases non-monotonically from the gas inlet opening (31) towards the gas outlet opening (32).

Classes IPC  ?

• F04D 23/00 - Autres pompes rotatives à déplacement non positif spécialement adaptées aux fluides compressibles
• F04D 29/40 - Carters d'enveloppeTubulures pour le fluide énergétique

Abrégé

The invention relates to improvements in compressors and, in particular, to an improvement in a method of controlling variable speed dynamic compressors to avoid 'motor overload as a result of choking.1 The invention therefore comprises a method of controlling a compressor to provide compressed gas at a target delivery pressure (Pt) and prevent excessive motor power consumption, the compressor being driven by a variable speed motor which has motor windings, wherein the gas inlet temperature (Tin), gas output delivery pressure (Pd), motor speed (Vm) and the motor winding temperature (Tmw) are continuously measured during operation of the compressor. The gas inlet temperature (Tin) is used to determine a predetermined maximum motor winding temperature (Tmwmax) limit. The maximum motor winding temperature (Tmwmax) is used (to set a maximum motor speed (Vmmax) limit. The maximum motor speed (Vmmax), target (Pt) and gas output delivery (Pd) pressures are used to control the actual motor speed (Vm) below the maximum motor speed limit (Vmmax).

Classes IPC  ?

• F04D 27/02 - Contrôle de l'emballement

Abrégé

The invention relates to improvements in compressors and, in particular, to improvements in a method of controlling centrifugal compressors to maximise their efficacy. The compressor has an impeller mounted on a shaft supported by an active magnetic bearing unit and is driven by a variable speed motor at a rotational speed under normal on-load conditions at a calculated pre-surge speed for the required delivery pressure. The actual rotational speed and delivery pressure of the compressor is repeatedly measured and recorded at high frequency. The compressor is allowed to surge periodically after a preset re-calibration time and the compressor is put into a surge recovery cycle when surge is detected, during which the compressor is off-loaded and the rotational speed reduced. The compressor pre-surge speed line is recalibrated during the surge recovery cycle for the current operating conditions and reloads the compressor when the shaft speed reaches the greater of the recalibrated presurge speed line or the load speed.

Classes IPC  ?

• F04D 27/02 - Contrôle de l'emballement

Produits et services

Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs; compressors; air and gas compressors (machines), air pump; vacuum pumps, air receivers, air centres, air ends, air blowers, air cylinders, filters, alternator for use with compressors, pressure regulators, drain kits, aftercoolers, oil separators; pneumatically operated tools namely screwdrivers, impact wrenches, nut runners, drill threaders, tappers and torque wrenches, air powered chipping hammers, chippers, needle scalers, and chisels, needles and punches therefor; air powered hammered riveters and rivet busters and rivet cutters therefor; air powered squeeze riveters, and rivet sets, yokes and yoke cylinders therefor; air powered straight and angles grinders, die grinders, and parts therefore namely, polishing heads, grinding wheels, sanding disks, and backup pads, cutter wheels, wheel guards and rotary wire brushes; parts for the aforesaid mentioned power operated tools namely, air motors, handles, clamps, mounting brackets, columns, chucks, collets, tool holders, drill heads, tapping heads and gear sockets, air regulators for pneumatic tools; road cutters, road rollers, compactors and road breakers; construction, quarrying, excavating and mining apparatus and instruments; valves, actuators, hydraulic servo mechanisms, hydraulic power unit and exhausters; parts and fittings for all the aforesaid goods. Building construction; repair; installation services; installation, repair and maintenance of compressors, air and gas compressors (machines), air pumps, vacuum pumps, air receivers, air centres, air ends, air blowers, air cylinders, filters, alternators for use with compressors, pressure regulators, drain kits, aftercoolers, oil separators, pneumatically operated tolls, namely screwdrivers, impact wrenches, nut wrenches, nut runners, drill threaders, tappers and torque wrenches, air powered chipping hammers, chippers, needle scalers, and chisels, needles and punches therefor, air powered hammer riveters and rivet busters and rivet cutters therefor, air powered squeeze riveters, and rivet sets, yokes and yoke cylinders therefor, air powered straight and angled grinders, die grinders, and parts therefor namely, polishing heads, grinding wheels, sanding discs, and backup pads, cutters wheels, wheel guards and rotary wire brushes, parts for the aforesaid mentioned power operated tools namely, air motors, handles, clamps, mounting brackets, columns, chucks, collets, tool holders, drill heads, tapping heads and gear sockets, air regulators for pneumatic tools, road cutters, road rollers, compactors and road breakers, construction, quarrying, excavating and mining apparatus and instruments, cooling and drying apparatus and installation, desiccant dryers, thermal dryers, air filters and purifiers, valves, actuators, hydraulic servomechanisms, hydraulic power unit and exhausters, parts and fittings for all the aforesaid goods.

Abrégé

A suction pipe for drawing in a fluid mix comprises an intake nozzle (10) which can be subjected to negative pressure for drawing in a second fluid (4), with at least one intake nozzle opening (20) open counter to a direction of intake flow and an adding nozzle (11) adding a first fluid (3) to the second fluid (4) drawn in by the intake nozzle (10), which adding nozzle (11) surrounds at least partially an adding channel (24) with at least one adding channel inlet opening (28) for drawing in the first fluid (3) and at least one adding channel outlet opening following the adding channel inlet opening (28) in a direction of adding flow, wherein the adding channel outlet opening and the intake nozzle opening (20) merge with each other in such a way that at least most of the first fluid (3) flowing through the adding channel (24) passes into the intake nozzle (10).

Classes IPC  ?

• F04C 19/00 - Pompes à piston rotatif avec anneau fluide ou dispositif analogue spécialement adaptés pour les fluides compressibles
• F04D 9/00 - AmorçagePrévention du blocage par la vapeur
• F04D 9/04 - Utilisation de pompes d'amorçageUtilisation de pompes de surpression pour éviter le blocage par la vapeur

Produits et services

Machines and machine tools for the compression of air and other gasses; air compressors, gas compressors, [ vacuum pumps and power operated blowers, ] and parts for all the aforesaid goods Installation, repair and maintenance of compressors, air and gas compressors, [ vacuum pumps and air and gas blowers and power operated blowers, ] and parts for all the aforesaid goods

Produits et services

(1) Machines and machine tools for the compression of air and other gases namely, air compressors, gas compressors, vacuum pumps, air and gas blowers and power operated blowers. (2) Air and gas compressors. (1) Installation, repair and maintenance of all of the following set out in this paragraph: air and gas compressors, vacuum pumps and air and gas blowers and power operated blowers.

Produits et services

Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs; compressors; air and gas compressors (machines), air pump; vacuum pumps, air receivers, air centres, air ends, air blowers, air cylinders, filters, alternator for use with compressors, pressure regulators, drain kits, aftercoolers, oil separators; pneumatically operated tools namely screwdrivers, impact wrenches, nut runners, drill threaders, tappers and torque wrenches, air powered chipping hammers, chippers, needle scalers, and chisels, needles and punches therefor; air powered hammered riveters and rivet busters and rivet cutters therefor; air powered squeeze riveters, and rivet sets, yokes and yoke cylinders therefor; air powered straight and angles grinders, die grinders, and parts therefore namely, polishing heads, grinding wheels, sanding disks, and backup pads, cutter wheels, wheel guards and rotary wire brushes; parts for the aforesaid mentioned power operated tools namely, air motors, handles, clamps, mounting brackets, columns, chucks, collets, tool holders, drill heads, tapping heads and gear sockets, air regulators for pneumatic tools; road cutters, road rollers, compactors and road breakers; construction , quarrying, excavating and mining apparatus and instruments; valves, actuators, hydraulic servo-mechanisms, hydraulic power unit and exhausters; and parts and fittings for all the aforesaid goods. Building construction; repair; installation services; installation, repair and maintenance of compressors, air and gas compressors (machines), air pumps, vacuum pumps, air receivers, air centres, air ends, air blowers, air cylinders, filters, alternators for use with compressors, pressure regulators, drain kits, after-coolers, oil separators; pneumatically operated tolls, namely screwdrivers, impact wrenches, nut wrenches, nut runners, drill threaders, tappers and torque wrenches; air powered chipping hammers, chippers, needle scalers, and chisels, needles and punches therefor; air powered hammer riveters and rivet busters and rivet cutters therefor; air powered squeeze riveters, and rivet sets, yokes and yoke cylinders therefor; air powered straight and angled grinders, die grinders, and parts therefor namely, polishing heads, grinding wheels, sanding discs, and backup pads, cutters wheels, wheel guards and rotary wire brushes; parts for the aforesaid mentioned power operated tools namely, air motors, handles, clamps, mounting brackets, columns , chucks, collets, tool holders, drill heads, tapping heads and gear sockets; air regulators for pneumatic tools; road cutters, road rollers, compactors and road breakers; construction, quarrying, excavating and mining apparatus and instruments; cooling and drying apparatus and installation; desiccant dryers, thermal dryers, air filters and purifiers, valves, actuators, hydraulic servomechanisms, hydraulic power unit and exhausters; and parts and fittings for all the aforesaid goods.

Produits et services

Vacuum pumps; compressors (included in this class), blowing machinery (included in this class), drives for the above vacuum pumps, compressors and blowing machinery.

Produits et services

Pompes pour l'élévation de liquides ou de gaz, pompes utilisant l'effet d'un anneau liquide tournant.