Abrégé

The present invention relates to the technical field of generators, and in particular to a salient-pole generator allowing for enhancement of cooling of pole coils. In the generator of the present invention, an air guide device is provided between poles of every two adjacent pole coils; the air guide device comprises an outer edge circumferential double-sided plate, a central radial plate, and an inner circumferential semi-extension plate which are sequentially arranged and form a whole; the outer edge circumferential double-sided plate is separately connected to the outer edges of rotor cores on two sides; the inner circumferential semi-extension plate is arranged between the inner edge of the leeward side of a pole coil and a stator core and serves as an insulating supporting plate; an air inlet is formed between the central radial plate and an insulating supporting plate at the inner edge of the windward side of the adjacent pole coil; an air outlet is formed in the leeward section of the outer edge circumferential double-sided plate; an insulating plate used for supporting is provided between every two adjacent wire turns of each pole coil; and inter-turn air channels are formed between the insulating plate and the wire turns on two sides. The present invention provides a salient-pole generator allowing for enhancement of cooling of pole coils that is capable of fully using the rotor dynamic pressure energy and greatly increasing the heat dissipation area of the pole coils.

Classes IPC  ?

• H02K 3/24 - Enroulements caractérisés par la configuration, la forme ou le genre de construction du conducteur, p. ex. avec des conducteurs en barre avec des canaux ou des conduits pour un agent de refroidissement entre les conducteurs
• H02K 1/32 - Parties tournantes du circuit magnétique avec des canaux ou des conduits pour l'écoulement d'un agent de refroidissement
• H02K 3/34 - Enroulements caractérisés par la configuration, la forme ou la réalisation de l'isolement entre conducteurs ou entre conducteur et noyau, p. ex. isolement d'encoches
• H02K 1/24 - Noyaux rotoriques à pôles saillants

Abrégé

Provided in the present application are a water turbine top cover and a water turbine. The water turbine top cover comprises: an outer top cover, which comprises a first upper annular plate, a first lower annular plate and a first rib plate, the first upper annular plate and the first lower annular plate being arranged opposite each other, and the opposite ends of the first rib plate being respectively connected to the first upper annular plate and the first lower annular plate; and an inner top cover, which is nested with the outer top cover, and comprises a second upper annular plate, a second lower annular plate and a second rib plate, the second upper annular plate and the second lower annular plate being arranged opposite each other, the opposite ends of the second rib plate being respectively connected to the second upper annular plate and the second lower annular plate, the outer edge of the second upper annular plate being connected to the inner edge of the first upper annular plate, and the outer edge of the second lower annular plate being connected to the inner edge of the first lower annular plate.

Classes IPC  ?

• F03B 11/02 - Carcasses d'enveloppe

Abrégé

Provided in the present application are a water pump turbine simulation device, and a water pump turbine simulation system and a control method therefor. The water pump turbine simulation device comprises a model top cover, crank arms, guide vanes, a drive ring and a drive assembly, wherein the plurality of crank arms are arranged at equal intervals along the circumference of the model top cover; one end of each crank arm is hinged to the model top cover, a guide vane stem is fixedly connected to each crank arm, and the guide vane stems penetrate the model top cover and are rotationally connected to the model top cover; each guide vane is fixedly connected to the corresponding guide vane stem, and the guide vanes are located on the side of the model top cover facing away from the crank arms; the drive ring is arranged around the model top cover, and the other end of the crank arm is fixedly connected to the drive ring; and the drive assembly is configured to drive the drive ring to rotate around its center.

Classes IPC  ?

• F03B 3/18 - Aubes de statorsAubes distributrices, p. ex. réglables

Abrégé

A temperature monitoring system for a stator. The temperature monitoring system comprises: a plurality of monitoring areas (1-X), which correspond to different structures of a stator; a plurality of optical-fiber temperature measurement points (11-1A, 21-2B, X1-XC), which are distributed within the plurality of monitoring areas; and N demodulators (i1-iN), wherein N is an integer greater than or equal to two, and each demodulator is connected to at least one optical-fiber temperature measurement point within each monitoring area. Further disclosed is a temperature measurement and calculation method for a stator. The temperature measurement and calculation method comprises: determining a first correlation model between a monitored temperature of a faulty measurement point and operating conditions, and then determining a roughly-calculated temperature value of the faulty measurement point on the basis of an operating condition at the current moment; determining a second correlation model between a monitored temperature of a neighboring measurement point and the operating conditions; then determining a roughly-calculated temperature value of the neighboring measurement point; determining a wear coefficient between the roughly-calculated temperature value and an actual temperature value of the neighboring measurement point; and on the basis of the wear coefficient, determining a measured and calculated temperature value of the faulty measurement point at the current moment. The stability and reliability of the temperature monitoring system are improved.

Classes IPC  ?

• G01K 11/32 - Mesure de la température basée sur les variations physiques ou chimiques, n'entrant pas dans les groupes , , ou utilisant des changements dans la transmittance, la diffusion ou la luminescence dans les fibres optiques

Abrégé

A ball valve body and a ball valve. The ball valve body comprises a first valve body structure (10) and a second valve body structure (20), wherein the first valve body structure (10) comprises a first connecting portion (100A) and a first main body portion (200A), the first main body portion (200A) being connected to one end of the first connecting portion (100A); the second valve body structure (20) is connected to the side of the first main body portion (200A) away from the first connecting portion (100A), and defines an accommodating space, in which a ball-valve movable door is placed; and the wall thickness of the first main body portion (200A) gradually decreases in a direction away from the first connecting portion (100A).

Classes IPC  ?

• F16K 27/06 - Structures des logementsMatériaux utilisés à cet effet des robinets ou des vannes

Abrégé

A motor speed measurement method and apparatus, an electronic device, and a storage medium, wherein the method comprises: controlling a stroboscopic light source to project, according to a preset pulse period, a light source onto a motor to be measured, and controlling a camera to capture a motor image in the process of projecting the light source onto said motor (210); performing target detection on the motor image to determine a movement distance of a preset marker in the motor image (220); and determining the rotational speed of said motor on the basis of the movement distance and the preset pulse period (230). The stroboscopic light source is controlled, by means of a pulse signal, to strobe, an image captured by the camera in the strobing process is analyzed, and the pixel movement range of the preset marker in the image and the preset pulse period are used to measure a motor speed, avoiding the problem of inaccurate rotational speed measurement caused by inconsistent tooth pitches of a fluted disc.

Classes IPC  ?

• G01P 3/38 - Dispositifs caractérisés par l'emploi de moyens optiques, p. ex. en utilisant la lumière infrarouge, visible ou ultraviolette en utilisant des moyens photographiques

Abrégé

The present application relates to the technical field of hydroelectric generators, and particularly relates to a high frequency periodic inspection system and method for a large-scale high-rotation-speed hydroelectric generator rotor. The periodic inspection system comprises a shaft system driving tool mounted in a main shaft of a hydroelectric generator located in a waterwheel chamber, a braking system, a high-pressure oil jacking system, a wind shield, a wind shield mounting/removing driving device, and a control system. The periodic inspection method comprises the following steps: shutting down a generator and enabling electrical isolation protection; mounting a shaft system driving device; removing a wind shield to create sufficient operation and inspection space; exiting a braking system and starting a high-pressure oil jacking system; using the shaft system driving device for rotation, and inspecting the safety and shaft system data of a rotating part; exiting the high-pressure oil jacking system, resetting the wind shield, and starting the braking system; and removing the shaft system driving device. The present application provides a high frequency periodic inspection system and method for a large-scale high-rotation-speed hydroelectric generator rotor, in which a wind shield does not need to be manually removed and a unit shaft system can be conveniently driven to rotate.

Classes IPC  ?

• H02K 15/00 - Procédés ou appareils spécialement adaptés à la fabrication, l'assemblage, l'entretien ou la réparation des machines dynamo-électriques
• H02K 15/02 - Procédés ou appareils spécialement adaptés à la fabrication, l'assemblage, l'entretien ou la réparation des machines dynamo-électriques des corps statoriques ou rotoriques

Abrégé

A guide bearing lubricating structure, comprising a main shaft; an oil tank (1) sleeved on the main shaft; a guide bearing collar (2) connected to the main shaft and located in the oil tank; a viscous pump assembly (4) fixed in the oil tank, a pressure oil chamber (6) being provided between the viscous pump assembly and the guide bearing collar, the viscous pump assembly comprising baffles (41, 42), and the baffles and the guide bearing collar defining an oil inlet (61) of the pressure oil chamber; and a bearing bush (3) fixed to the viscous pump assembly and supporting the guide bearing collar, an oil outlet (62) of the pressure oil chamber being defined between the bearing bush and the guide bearing collar. Also disclosed is a generator comprising the guide bearing lubrication structure.

Classes IPC  ?

• F16C 33/10 - Structures relatives à la lubrification

Abrégé

A double-needle straight flow internally controlled large nozzle for an impulse turbine, and a control method. The nozzle comprises a nozzle pipe (1); a nozzle cover (11) is connected to one end of the nozzle pipe (1); the nozzle cover (11) is provided with a nozzle opening (12); a main needle (2) used for opening or closing the nozzle opening (12) is arranged in the nozzle pipe (1); the main needle (2) is hollow inside, and is provided with an inner port (21) at the end; a small needle (3) used for opening or closing the inner port (21) is arranged in the main needle (2). According to the nozzle, the stress condition of the main needle in an opening/closing process can be effectively improved, and small flow adjustment and nozzle cavitation can be improved.

Classes IPC  ?

• F03B 1/04 - TuyèresOrganes portant les tuyères

Abrégé

Provided in the present application are a ball-valve mounting structure and a hydroelectric power system. The ball-valve mounting structure comprises: a valve body, which has ball valve legs, each ball valve leg being provided with a through bolt hole; a mounting base, to which a ball-valve base plate is fixed, the ball valve base plate having through holes, which are opposite the bolt holes; and leg screws, one end of each leg screw being embedded inside the mounting base, and the other end of the leg screw penetrating the corresponding bolt hole and the corresponding through hole, wherein the ball valve legs are mounted on the ball-valve base plate; and the surface of each ball valve leg facing the ball-valve base plate has a stainless steel layer, and the surface of the ball-valve base plate facing the ball valve legs has a bronze layer, such that a frictional force between the ball valve legs and the ball-valve base plate is reduced. In the present application, the phenomenon that relative sliding displacement between the ball valve legs and the ball-valve base plate is gradually reduced during a shutdown or halting is alleviated, thereby avoiding the phenomenon that the mounting base cracks and is damaged due to a gradual decrease in the relative sliding displacement.

Classes IPC  ?

• F16K 27/06 - Structures des logementsMatériaux utilisés à cet effet des robinets ou des vannes
• F16K 27/08 - Chapes de guidage pour axesDispositifs de fermeture des logementsChapeaux de protection contre la poussière, p. ex. pour valves de pneus
• F16K 51/00 - Autres détails non particuliers aux types de soupapes ou clapets ou autres appareils d'obturation
• F16N 15/00 - Lubrification avec des substances autres que l'huile ou la graisseLubrification caractérisée par l'utilisation de lubrifiants particuliers dans des appareils particuliers ou dans des conditions particulières
• F16M 7/00 - Détails de fixation ou de réglage des bâtis, châssis ou pièces de supports des moteurs sur leurs fondations ou leur baseFixation des parties fixes des moteurs, p. ex. des blocs cylindres
• F03B 11/00 - Parties constitutives ou détails non couverts par les groupes ou présentant un intérêt autre que celui visé par ces groupes

Abrégé

122, is connected to a power-grid end, and operates in a power-generator mode. The control method implements a stable control process on the basis of excitation control and rotation speed control. The present invention has the advantages of involving low costs in a full life cycle, realizing grid-connected electric energy of a good quality, having strong capability in reactive power support, and having a high economical efficiency and reliability.

Classes IPC  ?

• H02P 5/46 - Dispositions spécialement adaptées à la régulation ou la commande de la vitesse ou du couple d’au moins deux moteurs électriques pour la régulation de vitesse de plusieurs moteurs dynamo-électriques en relation les uns avec les autres

Abrégé

Disclosed in the present invention are a hydraulic turbine model test curve drawing method, apparatus and device, and a storage medium. The method comprises: obtaining test parameters collected during a hydraulic turbine model test; performing test curve drawing on the test parameters in a three-dimensional space coordinate system to obtain a three-dimensional parametric surface; selecting a plurality of cross-sections perpendicular to a target coordinate axis, and performing curve capturing on the three-dimensional parametric surface to obtain a plurality of parameter curves; performing piecewise fitting on each parameter curve, and adjusting a point, having the maximum deviation value from the fitted curve, in the parameter curve to obtain a corrected parameter curve; and drawing and obtaining a hydraulic turbine model test curve according to the corrected parameter curve. According to the present invention, real-time detection and optimization of error points of hydraulic test data are implemented by means of intelligent structural data time series matching curve drawing technology, thereby implementing real-time drawing of various performance comprehensive characteristic curves of hydraulic turbine model tests, and solving the technical problem of low efficiency in a correction process when facing test error points.

Classes IPC  ?

• G06T 17/30 - Description de surfaces, p. ex. description de surfaces polynomiales
• G06F 30/17 - Conception mécanique paramétrique ou variationnelle

Abrégé

An impulse turbine model test control system and method. The system comprises a test system and a control system; the test system extracts a test instruction and a test requirement in a target test task, and sends the test instruction to the control system; the control system sends the test instruction to a corresponding test device, so that the test device controls, according to the test instruction, an impulse turbine model to execute a test action; the control system receives operation data of the test device and transmits the operation data to the test system; the test system determines, according to the test requirement and the operation data of the corresponding test device, whether the current test action is abnormal. The system integrates a test system and a control system, no excessive manual intervention is needed, and tests can be automatically completed by means of intelligent scheduling.

Classes IPC  ?

• F03B 11/00 - Parties constitutives ou détails non couverts par les groupes ou présentant un intérêt autre que celui visé par ces groupes

Abrégé

A lubricating system and a rotating apparatus. The lubricating system comprises: a fixed oil tank (10); a main shaft (20), a sliding rotor (21) being annularly arranged on the main shaft (20), and the sliding rotor (21) extending into the fixed oil tank (10); a plurality of guide bearing bushes (30), the guide bearing bushes (30) being in contact with the outer peripheral surface of the sliding rotor (21); a self-pumping assembly (40), the self-pumping assembly (40) being arranged in the fixed oil tank (10), and the self-pumping assembly (40) and the sliding rotor (21) defining a self-pumping chamber (401); a circulating oil tank (50), the circulating oil tank (50) being communicated with the self-pumping chamber (401); and an oil spraying pipe (60), one end of the oil spraying pipe (60) being communicated with the circulating oil tank (50), and the other end of the oil spraying pipe (60) being located at the guide bearing bushes (30). The self-pumping assembly (40) comprises a self-pumping plate (41); the self-pumping plate (41) partially extends to the lower end of the sliding rotor (21) and is arranged spaced apart from the sliding rotor (21); a self-pumping port (402) is defined between the self-pumping plate (41) and the lower end of the sliding rotor (21); and the self-pumping port (402) is communicated with the self-pumping chamber (401).

Classes IPC  ?

• F16N 7/40 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier avec pompe séparéeInstallations centralisées de lubrification à circuit fermé
• F16N 7/30 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier l'huile étant entraînée par un autre fluide
• F16N 19/00 - Réservoirs à lubrifiants pour emploi dans les graisseurs ou les systèmes de lubrification
• F16N 21/00 - CanalisationsRaccordsAccessoires pour ouvertures de lubrification
• F16N 39/02 - Dispositions pour conditionner des lubrifiants dans les circuits de lubrification par refroidissement

Abrégé

The present invention relates to the technical field of hydraulic turbines, and in particular, to a method for reducing the stress at root portions of buckets of an impulse hydraulic turbine. According to the technical solution, the method for reducing the stress at root portions of buckets of an impulse hydraulic turbine comprises the following steps: connecting the front and back faces of a root portion of a bucket in a filleting manner to form a whole bucket body; establishing a bucket calculation model, and applying a boundary condition and a load; extracting a bucket root stress distribution cloud map according to a calculation result; performing regular removal in high-stress regions of the root portion of the bucket according to the bucket root stress distribution cloud map by using three-dimensional modeling software; and forming a smooth transition between curved surfaces of the root portion of the bucket, to obtain a novel bucket three-dimensional model having a low stress level. The present invention provides a method for reducing the stress at root portions of buckets of an impulse hydraulic turbine, which can effectively reduce the stress level at the root portions of the buckets, involves simple operations, has high universality, and can shorten the bucket development period.

Classes IPC  ?

• G06F 30/28 - Optimisation, vérification ou simulation de l’objet conçu utilisant la dynamique des fluides, p. ex. les équations de Navier-Stokes ou la dynamique des fluides numérique [DFN]

Abrégé

The present invention relates to the field of steam turbine generator static magnetic excitation technology, and provided is a connection structure for an electric generator rotating shaft and an external slip ring shaft, which comprises: a rotating shaft and a slip ring shaft which are coaxially mated, a mating face having a connection cavity; an insulating assembly, which is arranged in the connection cavity and comprises insulating parts which are separately connected to the rotating shaft and the sliding ring shaft, the insulating parts comprising two mounting surfaces; and a plurality of flexible conductive parts, which are arranged on the mounting surfaces and are in communication with conductive rods, a gap being maintained between the flexible conductive parts connected to a rotating shaft-side conductive rod and the flexible conductive parts connected to a sliding ring shaft-side conductive rod, the gap being filled with an electric connection block, and the rotating shaft-side flexible conductive parts and the sliding ring shaft-side flexible conductive parts establishing conduction; and a heat dissipation structure, which passes from an outer surface of the sliding ring shaft or the rotating shaft to the connection cavity. In the present invention, a magnetic excitation conductive structure is arranged within a mating face of the shafts, achieving a good protective effect on the magnetic excitation structure, while also guaranteeing reliable electrical cooperation; excessive internal temperatures are prevented by means of the heat dissipation structure, and therefore the reliability of the connection structure as a whole is improved.

Classes IPC  ?

• H02K 9/28 - Refroidissement des collecteurs, des bagues collectrices ou des balais, p. ex. par ventilation
• H02K 13/00 - Association structurelle de collecteurs de courant et de moteurs ou de génératrices, p. ex. plaques de montage des balais ou connexions avec les enroulementsAgencement des collecteurs de courant dans les moteurs ou les génératricesDispositions pour améliorer la commutation
• H01R 39/14 - Assemblage de collecteurs ou de bagues collectrices avec les arbres

Abrégé

The present application provides a bearing lubricating structure and a rotating device. The bearing lubricating structure comprises a rotating member; a plurality of bearing bushes, the plurality of bearing bushes being arranged in an annular array around the rotating member; and a plurality of heat-insulation oil supply assemblies, the heat-insulation oil supply assemblies being located between adjacent bearing bushes, wherein each heat-insulation oil supply assembly comprises an oil spraying pipe and an oil separation plate, the oil separation plate is in contact with the rotating member, and the oil spraying pipe supplies oil to at least one side of the oil separation plate. According to the present application, the heat-insulation oil supply assemblies are arranged between adjacent bearing bushes, and the adjacent bearing bushes are separated by means of the oil separation plates of the heat-insulation oil supply assemblies, such that the phenomenon that hot oil is transmitted between every two adjacent bearing bushes is avoided, and the amount of cold oil entering the bearing bushes can be increased while the amount of hot oil entering the bearing bushes is reduced, thereby facilitating reduction of the working temperature of the bearing bushes; in addition, the oil spraying pipe supplies oil to the bearing bushes for lubricating in a spraying mode, such that there is no need to soak the rotating member and a bearing in a lubricating medium, thereby avoiding foam and oil mist caused by agitation of the rotating member.

Classes IPC  ?

• F16C 33/04 - CoussinetsBaguesGarnitures antifriction

Abrégé

Embodiments of the present application provide a temperature measuring apparatus and a generator stator. The temperature measuring apparatus comprises a supporting member provided with a guide hole, the guide hole being formed in the length direction of the supporting member; and a temperature measuring member, comprising a plurality of temperature measuring probes which are provided in the guide hole at intervals. According to the temperature measuring apparatus provided by the embodiments of the present application, when some of the temperature measuring probes fail and the faulty temperature measuring probes are not monitored, the remaining temperature measuring probes can perform auxiliary temperature measurement, and the faulty temperature measuring probes can be found.

Classes IPC  ?

• G01K 1/08 - Dispositifs de protection, p. ex. étuis
• H02K 11/25 - Dispositifs pour détecter la température ou actionnés par des valeurs de cette variable
• H02K 1/18 - Moyens de montage ou de fixation des parties magnétiques fixes sur ou aux structures constituant le stator
• G01K 1/14 - SupportsDispositifs de fixationDispositions pour le montage de thermomètres en des endroits particuliers

Abrégé

The present application provides a bearing lubrication system and a rotating device. The bearing lubricating system comprises a shaft, a bearing, a lubricating oil tank, a high-level oil tank, a low-level oil tank, and a circulating pump. In the operation process of the circulating pump, the liquid level of a lubricating medium in the high-level oil tank and the low-level oil tank is larger than a preset liquid level, and the liquid level of the lubricating medium in the lubricating oil tank is close to or equal to 0. According to the present application, the high-level oil tank and the low-level oil tank which are connected to the lubricating oil tank are provided, and the lubricating medium is pumped by the circulating pump from the low-level oil tank to the high-level oil tank, such that the liquid level of the lubricating medium in the lubricating oil tank is close to or equal to 0, and the zero liquid level of the lubricating oil tank is achieved, thereby avoiding the phenomena of foam and oil mist generated in the lubricating oil tank due to rotation of the shaft relative to the bearing.

Classes IPC  ?

• F16C 33/10 - Structures relatives à la lubrification
• F16N 7/38 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier avec pompe séparéeInstallations centralisées de lubrification

Abrégé

The present application provides a bearing lubricating system operation method, a rotating device and a computer-readable storage medium. The bearing lubricating system operation method comprises: controlling a circulating pump to operate, so that a lubricating medium in a low-level oil tank flows into a high-level oil tank; controlling the lubricating medium in the high-level oil tank to flow into a lubricating oil tank, so as to spray and lubricate a bearing in the lubricating oil tank; controlling the lubricating medium in the lubricating oil tank to flow back into the low-level oil tank, so that in the operating process of the circulating pump, the liquid level of the lubricating medium in the high-level oil tank and the low-level oil tank is higher than a preset liquid level, and the liquid level of the lubricating medium in the lubricating oil tank is at or near 0. The present application achieves zero-liquid-level lubrication of a lubricating oil tank, so that the phenomena of foam and oil mist generated by rotation of the lubricating oil tank relative to the bearing may be avoided.

Classes IPC  ?

• F16C 33/10 - Structures relatives à la lubrification
• F16N 7/38 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier avec pompe séparéeInstallations centralisées de lubrification
• F16N 7/32 - Lubrification par brouillard d'huile

Abrégé

The present application provides a generator and a starting method and a turning off method therefor, and a computer readable storage medium. The starting method comprises: before controlling a shaft to rotate, starting a circulating pump, wherein a lubricating medium pumped by the circulating pump circularly flows through an upper oil tank, a lubricating oil tank, and a lower oil tank in sequence; measuring a first liquid level of a lubricating medium in the upper oil tank and a second liquid level of a lubricating medium in the lower oil tank; and when the first liquid level reaches a first preset condition and the second liquid level reaches a second preset condition and the liquid level of a lubricating medium in the lubricating oil tank is close to or equal to 0, controlling the shaft to rotate. According to the present application, zero-liquid-level lubrication of the lubricating oil tank is realized, and the phenomena of bubbles and oil mist in the lubricating oil tank caused by the rotation of the shaft relative to bearings can be avoided.

Classes IPC  ?

• F16N 37/00 - Équipement pour transvaser le lubrifiant d'un réservoir à un autre
• F16N 7/02 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier avec alimentation par gravité ou lubrification goutte à goutte
• F16N 29/04 - Dispositifs particuliers dans les installations ou les systèmes de lubrification indiquant ou détectant des conditions indésirablesUtilisation des dispositifs sensibles à ces conditions dans les installations ou les systèmes de lubrification permettant de donner une alarmeDispositifs particuliers dans les installations ou les systèmes de lubrification indiquant ou détectant des conditions indésirablesUtilisation des dispositifs sensibles à ces conditions dans les installations ou les systèmes de lubrification permettant d'arrêter des pièces en mouvement

Abrégé

Embodiments of the present application disclose an evaluation method, comprising: in response to a component fault, obtaining an operation parameter and fault prompt information associated with a component; calculating a first deduction value by means of the operation parameter, wherein the first deduction value represents the fault degree of the component; calculating a second deduction value by means of the fault prompt information, wherein the second deduction value represents the fault degree of the component; and performing fault evaluation on the component according to the first deduction value and the second deduction value to obtain an evaluation result.

Classes IPC  ?

• G06F 17/10 - Opérations mathématiques complexes
• G06F 17/16 - Calcul de matrice ou de vecteur
• G06Q 10/00 - AdministrationGestion
• G06Q 50/06 - Fourniture d’énergie ou d’eau

Abrégé

A repair device for burnout of a stator iron core in a giant hydraulic turbine generator, and a repair method thereof are provided. The repair device includes toothed plates, ventilation slots, binding holes, ventilation holes, and binding cables. Each of the toothed plates is matched with a burnout area in the middle of the iron core, such that two ends of the toothed plate are in contact with plate assemblies. The binding cables rotatably pass through the binding holes and are pulled tightly to bind the toothed plates and coil bars into an integral structure. The present disclosure solves the problem of influence on the power generation benefit during the flood season due to long re-lamination cycle after burnout of the middle of the stator iron core of the hydraulic turbine generator.

Classes IPC  ?

• H02K 15/50 - Désassemblage, réparation ou modification de machines dynamo-électriques

Abrégé

The present application provides an infrared temperature measurement method and apparatus, a terminal device, and a storage medium. The method comprises: by means of infrared emissivity of a plurality of identification marks preset in a region to be measured, identifying positions of the identification marks in the region to be measured, the region to be measured comprising a plurality of measured objects, an identification mark being set for each measured object, and the infrared emissivity of each measured object being different from the infrared emissivity of the identification mark corresponding to the measured object; according to the positions of the identification marks, determining the measured objects corresponding to the identification marks; and measuring the temperatures of the measured objects corresponding to the identification marks. According to the method, an object needing to be measured can be marked in advance by using a material having infrared emissivity different from infrared emissivity of a device, and under the condition of infrared measurement, the infrared emissivity of a mark is analyzed, so that a specific device can be effectively positioned by means of the mark, the temperature of the specific device is obtained, and the accuracy of infrared temperature measurement is improved.

Classes IPC  ?

• G01J 5/48 - ThermographieTechniques utilisant des moyens entièrement visuels

Abrégé

An insulation monitoring method and apparatus, an electronic device, and a storage medium. The method comprises: acquiring an induced electromotive force of each measured object, and respectively detecting an insulation resistance value of each measured object according to the sorting sequence of the measured objects (S101); when the induced electromotive force of any measured object is abnormal, interrupting the detection of the insulation resistance value of each measured object, setting the measured object with the insulation resistance value currently detected as a first target object, and setting the measured object with the abnormal induced electromotive force as a second target object (S102); and detecting whether the insulation resistance value of the second target object is abnormal, if yes, providing an alarm prompt, and continuously detecting the insulation resistance value of each measured object from the first target object according to the sorting sequence (S103). Therefore, when the induced electromotive force of any measured object is abnormal, the insulation resistance value of the measured object with abnormal induced electromotive force is further detected, the measured object with abnormal induced electromotive force can be quickly positioned, the timeliness of response insulation resistance value detection is improved, and the accuracy of insulation monitoring is improved.

Classes IPC  ?

• G01R 27/02 - Mesure de résistances, de réactances, d'impédances réelles ou complexes, ou autres caractéristiques bipolaires qui en dérivent, p. ex. constante de temps
• G01R 31/12 - Test de la rigidité diélectrique ou de la tension disruptive

Abrégé

The present application provides a stator core pressing state fault detection method and apparatus, a generator set monitoring system and a computer-readable storage medium. The method comprises: determining whether an adjacent measuring point is abnormal or not by taking a measuring point with abnormal information as a suspected measuring point; if the adjacent measuring point is normal, determining that a through-core screw at the suspected measuring point is abnormal; and if the adjacent measuring point is abnormal, determining that the through-core screw in a common monitoring area of the suspected measuring point and the adjacent measuring point is abnormal. According to the detection method of the present application, the abnormal through-core screw can be positioned, and the maintenance efficiency is improved.

Classes IPC  ?

• G01R 31/34 - Tests de machines dynamoélectriques
• G01L 5/00 - Appareils ou procédés pour la mesure des forces, du travail, de la puissance mécanique ou du couple, spécialement adaptés à des fins spécifiques

Abrégé

The present invention belongs to the technical field of impulse water turbines. Disclosed is a dual-regulation mechanism for a water-operated impulse water turbine. The dual-regulation mechanism for a water-operated impulse water turbine comprises a nozzle main body (1), wherein a deflector servomotor (2) is connected outside the nozzle main body (1), and a piston rod of the deflector servomotor (2) is connected to a deflector (3); a piston cylinder (4) is mounted in the nozzle main body (1), a piston (41) is mounted in the piston cylinder (4), a piston rod (42) is connected to the piston (41), the other end of the piston rod (42) extends out of the piston cylinder (4), the end of the piston rod (42) extending out of the piston cylinder (4) is connected to a connection ring (5), the connection ring (5) is perpendicular to the piston rod (42), a spray needle (6) is fixed to the connection ring (5), and the spray needle (6) extends out of a nozzle opening of the nozzle main body (1). By means of the dual-regulation mechanism for a water-operated impulse water turbine, the position of the spray needle can be conveniently and accurately controlled.

Classes IPC  ?

• F03B 15/20 - Commande par variation de l'écoulement du liquide spécialement adaptée aux turbines avec jets de liquide à grande vitesse heurtant des rotors à aubes ou à dispositifs similaires
• F03B 1/04 - TuyèresOrganes portant les tuyères

Abrégé

The present invention belongs to the technical field of electric motor heat dissipation, and particularly relates to a heat dissipation method based on a sliding bearing of an electric motor. The method comprises: machining a heat dissipation structure, and dissipating the heat of a bearing, wherein machining a heat dissipation structure comprises: providing an embedded heat-dissipation structure in a sliding bearing and/or mounting an external heat-dissipation structure in a bearing lubrication system of a generator; and dissipating the heat of a bearing comprises: using the embedded heat-dissipation structure to balance the internal temperature of the sliding bearing and/or using the external heat-dissipation structure to cooperate with the bearing lubrication system to externally conduct heat of the sliding bearing. In the technical solution, the embedded heat-dissipation structure and the external heat-dissipation structure are combined, such that the temperature gradient of a bearing shell body is gradually flattened, thermal deformation of a bearing is reduced, the thickness of an oil film is increased, and rapid cooling of the bearing under lubrication is also achieved. That is, an inner and outer double cooling means is used, thereby providing, to the maximum extent, effective and reliable heat dissipation conditions for a bearing under lubrication.

Classes IPC  ?

• F16C 37/00 - Refroidissement des paliers
• F16N 39/02 - Dispositions pour conditionner des lubrifiants dans les circuits de lubrification par refroidissement
• H02K 9/20 - Dispositions de refroidissement ou de ventilation pour machines avec enveloppe fermée et circuit fermé de refroidissement utilisant un agent de refroidissement liquide, p. ex. de l'huile dans lesquels l'agent de refroidissement se vaporise dans l'enveloppe de la machine
• H02K 5/167 - Moyens de support des paliers, p. ex. supports isolants ou moyens pour ajuster les paliers dans leurs flasques utilisant des paliers à contact lisse ou des chapeaux de palier sphériques
• H02K 9/22 - Dispositions de refroidissement ou de ventilation par un matériau solide conducteur de la chaleur s'encastrant dans, ou mis en contact avec, le stator ou le rotor, p. ex. des ponts de chaleur

Abrégé

Disclosed is a combined impulse water turbine runner, relating to the technical field of impulse water turbines. The combined impulse water turbine runner comprises water buckets, a wheel disc, an upper cover plate and a lower cover plate; multiple water buckets are provided and uniformly arranged on a periphery of the wheel disc, a water bucket comprising a bucket root at an inner end and a bucket at an outer end; the bucket root has an embedded shifting fork structure, and comprises an upper shifting fork and a lower shifting fork, the upper shifting fork and the lower shifting fork being provided with multiple upper and lower coaxial bucket root holes, and an embedded block being located between the upper shifting fork and the lower shifting fork at an end close to the bucket; a first shaft hole is formed in the center of the wheel disc, multiple hole systems are formed on the surface of the wheel disc, multiple wheel disc through holes are formed in each hole system along a circumferential direction, and multiple embedded grooves are uniformly distributed along a circumferential edge of the wheel disc; the embedded blocks are embedded into the embedded grooves, so that the embedded blocks and the wheel disc bear partial tangential force of jet flow-impacted bucket roots; a second shaft hole is formed in the center of both the upper cover plate and the lower cover plate, and the plate surfaces are provided with multiple cover plate fixing holes.

Classes IPC  ?

• F03B 1/02 - AugetsRotors portant les augets

Abrégé

A method for machining a high-head water pump turbine blade disc, comprising the following steps: S1, respectively casting a upper blade disc (1) and a lower blade disc (2), wherein the upper blade disc (1) comprises an upper crown (3) and upper sections of a plurality of blades (4), and the lower blade disc (2) comprises a lower ring (5) and lower sections of the plurality of blades (4); S2, carrying out numerical control machining on the upper blade disc (1) and the lower blade disc (2), respectively; S3, welding the upper sections of the blades (4) on the upper blade disc (1) and the lower sections of the blades (4) on the lower blade disc (2); and S4, carrying out relief grinding on welding seams. In the welding process and the relief grinding process, the machining position is located in the middle of a flow channel, only the upper sections of the blades and the lower sections of the blades need to be welded together, machining is convenient, and the product quality is improved.

Classes IPC  ?

• F03B 3/12 - AubesRotors portant les aubes
• B23P 15/00 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe

Abrégé

0ttttttt000, giving an early warning signal. According to the present invention, anomalous temperature data can be recognized, an early thermal fault can be found, and in combination with the counting of the counters, an anomaly alarm is only given when the number of times for which the threshold is exceeded is accumulated to a certain value, such that the temperature early warning is more accurate.

Classes IPC  ?

• G01K 13/00 - Thermomètres spécialement adaptés à des fins spécifiques
• G01K 1/024 - Moyens d’indication ou d’enregistrement spécialement adaptés aux thermomètres pour l’indication à distance

Abrégé

Disclosed in the present invention are a bolt fault diagnosis method and apparatus. The method comprises the following steps: S1, performing a bolt fault simulation test, and recording monitoring data of a bolt fault monitoring point; S2, simulating a bolt fault by means of a finite element method, and establishing a virtual fault case library; and S3, extracting a fault feature from the virtual fault case library, and performing artificial intelligence modeling on a real machine bolt fault. By means of the present invention, the problem in the prior art of it being impossible to perform effective diagnosis on all bolts by means of a limited number of test points is solved, thereby solving the problem of performing monitoring and fault diagnosis of a bolt group of existing devices.

Classes IPC  ?

• G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]
• G06F 30/27 - Optimisation, vérification ou simulation de l’objet conçu utilisant l’apprentissage automatique, p. ex. l’intelligence artificielle, les réseaux neuronaux, les machines à support de vecteur [MSV] ou l’apprentissage d’un modèle
• G06F 30/17 - Conception mécanique paramétrique ou variationnelle
• G01L 5/173 - Appareils ou procédés pour la mesure des forces, du travail, de la puissance mécanique ou du couple, spécialement adaptés à des fins spécifiques pour la mesure de plusieurs composantes de la force en utilisant des moyens acoustiques

Abrégé

A stator iron core melting repairing device and method for large hydro-generator, the device comprising toothed plates, ventilation slots, binding holes, ventilation holes, and binding cables. The toothed plates are fitted with a melting area at the middle part of an iron core, two ends of the toothed plates abut against lamination groups, and the binding cables pass through the binding holes and tighten for binding, such that the toothed plates and bars are bound into an integral structure. The present invention overcomes the problem that the power generation benefit during a flood season is affected by a long lamination cycle after the middle part of a stator iron core of a hydro-generator melts, and has the characteristics of simple structure, capability to repair the melting area in the middle part of the iron core without needing to re-laminate, fast repair speed, high repair efficiency, short repair cycle, and simple and convenient operations.

Classes IPC  ?

• H02K 15/02 - Procédés ou appareils spécialement adaptés à la fabrication, l'assemblage, l'entretien ou la réparation des machines dynamo-électriques des corps statoriques ou rotoriques

Abrégé

The present invention relates to the technical field of wind turbines. Disclosed are a method and apparatus for reducing a circumferential temperature difference between a coil and an iron core of a motor. The method comprises the following steps: a. mounting an apparatus for reducing a circumferential temperature difference between a coil and an iron core of a motor to a wind turbine; b. mounting an oblique wind shield plate at an outlet of a wind inlet pipe, mounting wind volume adjustment plates at wind inlet holes, and adjusting air circumferential resistance by means of the wind volume adjustment plates; and c. making, in a circumferential symmetric unit, a near-turbine end close to a turbine axis have a smallest wind-passing area and a far-turbine end away from the turbine axis have a largest wind-passing area. The present invention features simple and flexible operations, is easy to implement, can not only improve the circumferential uniformity of air streams but also adjust areas of different wind inlet holes by shielding the sizes of the wind inlet holes by means of the wind volume adjustment plates according to actual requirements to implement uniform circumferential distribution of wind speeds, and can reduce at most 10-20K of a circumferential temperature difference of a motor.

Classes IPC  ?

• H02K 5/20 - Enveloppes ou enceintes caractérisées par leur configuration, leur forme ou leur construction avec des canaux ou des conduits pour la circulation d'un agent de refroidissement
• H02K 1/20 - Parties fixes du circuit magnétique avec des canaux ou des conduits pour l'écoulement d'un agent de refroidissement
• H02K 1/32 - Parties tournantes du circuit magnétique avec des canaux ou des conduits pour l'écoulement d'un agent de refroidissement

Abrégé

The present invention relates to the field of wind generators, and disclosed is a device for reducing the circumferential temperature difference between a coil and a core of a large-diameter motor, comprising a rotor frame, a rotor core and a rotor magnet. The device is characterized in further comprising a multi-segment stator core section, a first core pressing plate, a second core pressing plate and a tensioning screw; the stator core section is formed by laminating silicon steel sheets; a groove is provided on the silicon steel sheets; a first circumferential ring plate is fixed on the multi-segment stator core section; at least three axial vertical plates are fixed on the inner wall of the first circumferential ring plate; a first vertical plate and a second vertical plate are fixed on the outer wall of the first circumferential ring plate; a second circumferential ring plate is fixed between the first vertical plate and the second vertical plate; the first vertical plate is connected to one oblique wind deflector by means of a plurality of connecting plates; and an air volume adjusting plate is provided on air inlet holes. The present invention may improve the circumferential uniformity of the airflow, may adjust the area of different air inlet holes so as to achieve the even distribution of the wind speed in the circumferential direction, and may reduce the circumferential temperature difference of the motor.

Classes IPC  ?

• H02K 5/20 - Enveloppes ou enceintes caractérisées par leur configuration, leur forme ou leur construction avec des canaux ou des conduits pour la circulation d'un agent de refroidissement
• H02K 1/20 - Parties fixes du circuit magnétique avec des canaux ou des conduits pour l'écoulement d'un agent de refroidissement
• H02K 1/32 - Parties tournantes du circuit magnétique avec des canaux ou des conduits pour l'écoulement d'un agent de refroidissement

Abrégé

The present invention relates to the technical field of generators, and disclosed are a method and device for improving the uniformity of the axial temperature distribution of a stator, the method being characterized in comprising the following steps: a. installing a stator axial temperature distribution uniformity device onto a wind turbine generator; b. installing and arranging a first stator pressing plate, a second stator pressing plate, an axial ring plate, a circumferential ring plate and a stator core of the stator axial temperature distribution uniformity device, and setting the included angle between the circumferential ring plate and the axial ring plate to be 85-95° to form a back space of the stator core; c. setting an air flow that circulates in the back space of the stator core to have the same flow rate and opposite flow direction at the same axial position as an air flow circulating in a gap between the stator and a rotor. In the present invention, the static pressure difference may be maintained at a fixed value, the axial wind speed of the stator wind groove is relatively uniform, the operation is simple and is easy to adjust. Moreover, the axial temperature difference between a stator coil and the stator core may be effectively reduced, and the reliability and stability of the generator may be ensured.

Classes IPC  ?

• H02K 1/20 - Parties fixes du circuit magnétique avec des canaux ou des conduits pour l'écoulement d'un agent de refroidissement
• H02K 9/02 - Dispositions de refroidissement ou de ventilation par l'air ambiant s'écoulant à travers la machine

Abrégé

An overexcitation limiting method and system for an excitation regulator, the overexcitation limiting method for the excitation regulator comprising: determining an inertia time constant; collecting an excitation current of a generator, and calculating a first calculation result according to the inertia time constant and the excitation current; comparing the magnitude of the first calculation result with the magnitude of a first comparison value to obtain a first comparison result, and determining an output result according to the first comparison result; when the output result is a second numerical value, starting an overexcitation limiting inverse time limit adjustment so as to reduce the excitation current to a first preset value.

Classes IPC  ?

• H02J 3/50 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs contrôlant la répartition de la composante déphasée
• H02P 9/14 - Dispositions pour la commande de génératrices électriques de façon à obtenir les caractéristiques désirées à la sortie par variation du champ

Abrégé

12122 is 1-5% of the height h of the fixed guide vane (3); and installing the tail fin (4) on a water outlet edge of the fixed guide vane (3). The tail fin (4) is mounted on the fixed guide vane (3) of the water turbine, so that the excitation frequency of Karman Vortex Street can be increased to prevent hydraulic power elastic resonance, avoid cracks of the fixed guide vane (3) and prevent the water turbine from hissing.

Classes IPC  ?

• F03B 3/18 - Aubes de statorsAubes distributrices, p. ex. réglables

Abrégé

Provided is a seat ring of a reaction water turbine, the seat ring comprising an upper ring plate (1), a lower ring plate (2), and a plurality of fixed guide vanes (3) fixedly provided between the upper ring plate (1) and the lower ring plate (2); a tail fin (4) is provided on the fixed guide vane (3); the tail fin (4) is fixed to the middle part of a water outlet edge of the fixed guide vane (3); the tail fin (4) is columnar; the cross section of the tail fin (4) is in the shape of a trapezoid; the tail fin is enclosed by a tail fin bottom edge (5), a tail fin water outlet edge (6), a first tail fin lateral edge (7) and a second tail fin lateral edge (8); the length of the tail fin bottom edge (5) is equal to the length of the water outlet edge of the fixed guide vane (3); the tail fin bottom edge (5) is fixedly connected to the water outlet edge of the fixed guide vane (3); the tail fin bottom edge (5) is parallel to the tail fin water outlet edge (6); and the length of the tail fin bottom edge (5) is greater than the length of the tail fin water outlet edge (6). The seat ring can improve the excitation frequency of Karman Vortex Street, prevent hydraulic power elastic resonance, and avoid cracks of the fixed guide vane and hissing of the water turbine.

Classes IPC  ?

• F03B 3/18 - Aubes de statorsAubes distributrices, p. ex. réglables

Abrégé

Disclosed is a trimming method for a blade outlet edge (1) of a mixed-flow water turbine runner. The method comprises the steps of: cutting out a blade wing profile, and determining a blade outlet edge (1) trimming area; enabling an after-trimming blade back molded line (3) and a pre-trimming blade back molded line (4) to be in circular arc transition, wherein the radius R of the circular arc is 4-7 times of the thickness t1 of the blade outlet edge before trimming; determining the final geometric dimension of trimming of the blade outlet edge (1); determining the sizes of a child-mother sample plate (11, 12) and a circular arc sample plate (13) of the back of the blade, and integrally machining the child-mother sample plate and the circular arc sample plate of the back of the blade; marking off on the blade outlet edge (1), and determining the final position of a back pressure edge (6) of the outlet of the blade after trimming; adjusting the angle of the blade outlet edge (1) until the angle meets the size of the child-mother sample plate (11, 12); and grinding the circular arc of the back of the blade until the circular arc meets the size of the circular arc sample plate (13) of the back of the blade. The method can prevent or eliminate water turbine hissing and blade cracks generated by blade hydraulic power elastic resonance induced by Karman Vortex of a runner outlet, and improves the structural integrity of the mixed-flow water turbine runner and the operation safety of the water turbine.

Classes IPC  ?

• F03B 3/12 - AubesRotors portant les aubes
• F03B 3/02 - "Machines" ou machines motrices du type "à réaction"Parties constitutives ou détails particuliers les concernant à écoulement radial du côté haute pression et écoulement axial du côté basse pression des rotors, p. ex. turbines Francis
• F03B 11/04 - Parties constitutives ou détails non couverts par les groupes ou présentant un intérêt autre que celui visé par ces groupes pour diminuer la cavitation ou les vibrations, p. ex. équilibrage
• B24B 19/14 - Machines ou dispositifs conçus spécialement pour une opération particulière de meulage non couverte par d'autres groupes principaux pour meuler des aubes de turbine, des pales d'hélice ou similaires

Abrégé

A full-path sealing structure of a steam turbine generator and an assembly method. The full-path sealing structure of a steam turbine generator comprises a transition ring (1), a sealing plate (5), an end cover (8), a sealing base (11), a rotating shaft (12), and a sealing base cover (13). Sealing structures are formed respectively between the sealing base (11) and the rotating shaft (12) and between the sealing base cover (13) and the rotating shaft (12). A sealing structure is formed between the sealing base (11) and the sealing base cover (13). Sealing structures are formed respectively between the transition ring (1) and the end cover (8) and between the transition ring (1) and the sealing base (11) by means of the sealing plate (5). The structure can make an oil sealing structure of a steam turbine generator form a full-path closed sealing structure in a horizontal joint surface, and can effectively prevent hydrogen from leaking from an inner hydrogen side (a high pressure area) of the steam turbine generator to flow to an outer side (a low pressure area) of the steam turbine generator, and thus, the sealing reliability of the steam turbine generator in the horizontal joint surface is greatly improved, and the steam turbine generator has a simple and compact structure, and is easy to assemble.

Classes IPC  ?

• H02K 5/124 - Garniture d'étanchéité des arbres

Abrégé

A hydrogen sealing structure applied in a steam turbine generator. The hydrogen sealing structure comprises a pressing bar (13), a pressing bolt (14), a lower pressing plate (7), a sealing pressing plate (8), a hydrogen cooler body (4), and a generator shell (6); an upper pipe bearing plate (5) and a lower pipe bearing plate (2) are respectively fixedly connected to two opposite ends of the hydrogen cooler body (4); a sealed connection is formed between the upper pipe bearing plate (5) and the generator shell (6); a fixed sealing structure is formed between the lower pressing plate (7) and the generator shell (6); a notch is provided at a free end of the lower pressing plate (7); a first sealing member (9) is mounted in the notch; the pressing bolt (14) runs through the pressing bar (13) and then is fixedly connected with the lower pressing plate (7), and makes the pressing bar (13) tightly press the sealing pressing plate (8); the sealing pressing plate (8) tightly presses the first sealing member (9); a slidably sealing structure is formed between the first sealing member (9) and the lower pipe bearing plate (2). The sealing structure can improve the sealing reliability of a sealing surface between a hydrogen cooler and a generator shell in the horizontal direction and the vertical direction, so that the safety and reliability of a steam turbine generator are effectively improved during operation.

Classes IPC  ?

• H02K 5/12 - Enveloppes ou enceintes caractérisées par leur configuration, leur forme ou leur construction spécialement adaptées à un fonctionnement dans un liquide ou dans un gaz

Abrégé

A loop-shaped oil sealing structure of a steam turbine generator, comprising a transition ring (1), an end cover (8), and a sealing base (11). Sealing structures are formed respectively between the transition ring (1) and the end cover (8) and between the transition ring (1) and the sealing base (11) by means of a sealing plate (5); the transition ring (1) is provided with a first branch oil passage (2) and a second branch oil passage (4) that are in communication with each other; the first branch oil passage (2) and the second branch oil passage (4) separately run through the sealing plate (5); the end cover (8) is provided with a mounting recess and a second sealing strip (6) is embedded in the mounting recess; the sealing base (11) is provided with a mounting recess and a first sealing strip (7) is embedded in the mounting recess; the first branch oil passage (2) and the second branch oil passage (4) are filled with a sealing oil; the first branch oil passage (2), the second branch oil passage (4), the sealing plate (5), the second sealing strip (6), and the first sealing strip (7) together form the loop-shaped oil sealing structure. The loop-shaped oil sealing structure of a steam turbine generator can reduce the amount of supplemented hydrogen when the steam turbine generator runs, reduces application costs of the steam turbine generator, and effectively improves the running safety and reliability of the steam turbine generator.

Classes IPC  ?

• H02K 5/10 - Enveloppes ou enceintes caractérisées par leur configuration, leur forme ou leur construction avec des dispositions empêchant l'introduction de corps étrangers, p. ex. de l'eau ou des doigts
• F16J 15/14 - Joints d'étanchéité entre surfaces immobiles entre elles au moyen d'un matériau en grains ou en matière plastique ou d'un fluide

Abrégé

A structure for fixing a stator core (3) and a base (1), comprising a positioning rebar (4) and a holding block fixed between the stator core and the base; the holding block comprises a plurality of holding blocks A (2) for fixing the positioning rebar in a radial direction and a plurality of holding blocks B (6) for fixing the positioning rebar in a tangential direction; and elastic elements (5) are provided between the holding blocks A and the positioning rebar. The fixing structure effectively prevents a warping deformation of the stator core and the base caused by the expansion of the stator core, and reduces the vibration of the stator core by utilizing the rigidity of the base.

Classes IPC  ?

• H02K 1/18 - Moyens de montage ou de fixation des parties magnétiques fixes sur ou aux structures constituant le stator

Abrégé

A method for reducing a churning loss of a combined thrust bearing, comprising the following steps: a, injecting lubricating oil into an oil sump (8) to enable a guide bearing bush (9) to be immersed in the lubricating oil; b, providing a high-level oil tank (1) with a one-way vent valve (13), utilizing an oil supplying pump (3) to inject the lubricating oil in the oil sump (8) into the high-level oil tank (1), and injecting the lubricating oil in the high-level oil tank (1) between a runner plate (15) and a thrust pad (10) and/or between a bearing thrust head (14) and the guide bearing bush (9), such that the lubricating oil circulates between the oil sump (8) and the high-level oil tank (1), and an oil inlet quantity of the high-level oil tank (1) is greater than an oil outlet quantity thereof; c, with an increase in the oil quantity of the high-level oil tank (1), enabling, via the one-way vent valve (13), the oil outlet quantity of the high-level oil tank (1) and the oil inlet quantity of the high-level oil tank (1) to be gradually the same, a level of the lubricating oil in the oil sump (8) being below the thrust pad (10). The method solves the problem in the prior art that a thrust bearing is immersed in the lubricating oil in operation, thus avoiding generating a churning loss.

Classes IPC  ?

• F16N 7/28 - Lubrification par trempage
• F16N 39/02 - Dispositions pour conditionner des lubrifiants dans les circuits de lubrification par refroidissement

Abrégé

An evaporative cooling system of a vertical-shaft motor, comprising a vacuum pump (16), an exhaust pipe (15), an evaporative cooling device, a liquid supply and drainage device and a steam recycling device; the liquid supply and drainage device comprises a main liquid storage tank (29), a transitional liquid storage tank (30), a connecting pipe (41) and a liquid supply and drainage header pipe (38); the lower part of the transitional liquid storage tank (30) is connected to a first liquid supply and drainage pipeline (46) and a second liquid supply and drainage pipeline (39); the two liquid drainage pipelines communicate with each other via the connecting pipe (41); the second liquid supply and drainage pipeline (39) is provided with a total liquid returning pipe (36) thereon; the evaporative cooling device comprises a pressure equalizing pipe (1), a first condenser (12), a stator bar cooling branch and a collector ring cooling branch; the pressure equalizing pipe (1) is connected to the first condenser (12), and is connected to a steam recycling device via the exhaust pipe (15); the vacuum pump (16) is connected to the exhaust pipe (15). The system provides two liquid supply methods for the first liquid supply of the evaporative cooling device, thus reducing the loss of a cooling medium.

Classes IPC  ?

• H02K 9/20 - Dispositions de refroidissement ou de ventilation pour machines avec enveloppe fermée et circuit fermé de refroidissement utilisant un agent de refroidissement liquide, p. ex. de l'huile dans lesquels l'agent de refroidissement se vaporise dans l'enveloppe de la machine
• H02K 9/24 - Protection contre les défectuosités des dispositions de refroidissement, p. ex. du fait de fuites de l'agent de refroidissement ou du fait d'un arrêt de la circulation de l'agent de refroidissement
• H02K 9/28 - Refroidissement des collecteurs, des bagues collectrices ou des balais, p. ex. par ventilation
• H02K 9/193 - Dispositions de refroidissement ou de ventilation pour machines avec enveloppe fermée et circuit fermé de refroidissement utilisant un agent de refroidissement liquide, p. ex. de l'huile avec des moyens de remplissage de l'agent de refroidissementDispositions de refroidissement ou de ventilation pour machines avec enveloppe fermée et circuit fermé de refroidissement utilisant un agent de refroidissement liquide, p. ex. de l'huile avec des moyens pour empêcher les fuites de l'agent de refroidissement