A seal includes a mating ring that rotates relative to a carbon primary ring at a seal interface. A buffer gas is provided into the seal and passes from the back of the primary ring to the seal interface though holes drilled in the primary ring. The seal can be used as a separation seal or in combination with another seal.
A seal includes a mating ring that rotates relative to a carbon primary ring at a seal interface. A buffer gas is provided into the seal and passes from the back of the primary ring to the seal interface though holes drilled in the primary ring. The seal can be used as a separation seal or in combination with another seal.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
F16J 15/3284 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structureSelection of materials
Systems and methods for monitoring a liquid filter. The method includes: passing liquid through a filter contained within a housing; providing light into the filter; receiving reflected light from the filter, analyzing the reflected light with a spectrometer, and determining that the filter should be cleaned or repaired based on rate of change of a color of the reflected light.
Systems and methods for monitoring a liquid filter. The method includes: passing liquid through a filter contained within a housing; providing light into the filter; receiving reflected light from the filter; analyzing the reflected light with a spectrometer; and determining that the filter should be cleaned or repaired based on rate of change of a color of the reflected light.
G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
A filter system includes a housing and a plurality of filter elements disposed in the housing. The plurality of filter elements includes one or more filter elements of a first filter element type and including one or more filter elements of a second filter element type. The system also includes a receptacle plate in the housing, the receptacle plate has at least two different mating elements for attaching filter elements thereto. The receptacle plate includes one or more first mating elements configured to mate with filter elements of the first type and one or more second mating elements configured to mate with filter elements of the second type.
B01D 29/15 - Supported filter elements arranged for inward flow filtration
B01D 29/52 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
B01D 36/02 - Combinations of filters of different kinds
A filter system includes a housing and a plurality of filter elements disposed in the housing. The plurality of filter elements includes one or more filter elements of a first filter element type and including one or more filter elements of a second filter element type. The system also includes a receptacle plate in the housing, the receptacle plate has at least two different mating elements for attaching filter elements thereto. The receptacle plate includes one or more first mating elements configured to mate with filter elements of the first type and one or more second mating elements configured to mate with filter elements of the second type.
B01D 29/52 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
B01D 29/15 - Supported filter elements arranged for inward flow filtration
A filter system includes a duplex filter system that includes a first housing and a second housing configured to filter a liquid, a heating housing arranged adjacent the duplex filter system; a lifting system arranged to move filter canisters from the heating housing to one of the first or second housing.
B01D 29/96 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor in which the filtering elements are moved between filtering operationsParticular measures for removing or replacing the filtering elementsTransport systems for filters
B01D 29/52 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
B01D 29/52 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
B01D 29/96 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor in which the filtering elements are moved between filtering operationsParticular measures for removing or replacing the filtering elementsTransport systems for filters
B29C 48/691 - Arrangements for replacing filters, e.g. with two parallel filters for alternate use
The present invention relates to seal arrangements for rotating components, in particular, for rotating components which are driven at variable angular speeds. An aspect of the disclosure provides a seal arrangement for an apparatus comprising: a housing; and, a rotatable component disposed within the housing; wherein the rotatable component is configured to rotate at a variable angular speed about a rotational axis, the seal arrangement comprising: a first seal assembly (500) configured to be disposed on the rotatable component of the apparatus and to rotate around the rotational axis, the first seal assembly comprising: a first retainer (510); a first seal face (516); wherein: the first seal face is disposed within the first retainer; and, the first retainer is configured to provide a rotary driving force to the first seal face to thereby rotationally drive the first seal face; a first cushioning member (530) disposed between the first seal face and the first retainer, wherein the first cushioning member is configured to dampen the rotary driving force provided by the first retainer to the first seal face; a second seal assembly configured to be disposed on the housing: a second retainer (611); a second seal face (618); wherein: the second seal face configured to be disposed within the second retainer; wherein the first seal face is disposed in contact with the second seal face to thereby seal against egress of fluid between the first seal face and the second seal face.
A system includes computer-readable media having memory, one or more processors, and instructions in the memory that, when executed by the one or more processors, cause the processor(s) to: generate an archive container, a cooked container, an ingest container, and an index container; receive, in the ingest container, a plurality of time series data elements; identify a data format for each of the time series data elements; divide the plurality of time series data elements into a plurality of data sub-elements based on a corresponding append binary large objects (blobs) contained in the cooked container; generate, statistical data for the plurality of time series data elements for each of one or more index blobs contained in the index container; and output: the statistical data to the index container; the plurality of data sub-elements to the cooked container, and the plurality of time series data elements to the archive container.
A remote methane detector is described herein. The remote methane detector includes an external shell defining an interior cavity. The remote methane detector also includes an airflow aperture. The remote methane detector also includes a methane sensor disposed within the interior cavity, wherein the methane sensor is adapted and configured to receive airflow from the airflow aperture and to detect methane within the airflow. The remote methane detector also includes a rechargeable power source. The remote methane detector also includes a low-energy telecommunications transceiver chain. The remote methane detector also includes an energy collector adapted and configured to collect renewable energy and to power at least the methane sensor and the low-energy telecommunications transceiver chain.
A rotary machine (1) includes a rotating shaft (2), a housing (5) that surrounds a portion of the rotating shaft (2) and has an initial pressure therein and a gas seal (4) that pumps gas out of the housing (5) to reduce pressure in the housing (5) to an operating pressure that is less than the initial pressure.
A remote methane detector is described herein. The remote methane detector includes an external shell defining an interior cavity. The remote methane detector also includes an airflow aperture. The remote methane detector also includes a methane sensor disposed within the interior cavity, wherein the methane sensor is adapted and configured to receive airflow from the airflow aperture and to detect methane within the airflow. The remote methane detector also includes a rechargeable power source. The remote methane detector also includes a low-energy telecommunications transceiver chain. The remote methane detector also includes an energy collector adapted and configured to collect renewable energy and to power at least the methane sensor and the low-energy telecommunications transceiver chain.
A rotary machine includes a rotating shaft, a housing that surrounds a portion of the rotating shaft and has an initial pressure therein and a gas seal that pumps gas out of the housing to reduce pressure in the housing to an operating pressure that is less than the initial pressure.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
H02K 16/02 - Machines with one stator and two rotors
F16J 15/3204 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
A condition monitoring apparatus (300) for a system comprising rotating or reciprocating machinery and a seal is disclosed herein. The apparatus comprises a first acoustic sensor (301) coupled to the seal for providing a first acoustic emission signal, a second acoustic sensor (302) coupled to the rotating or reciprocating machinery for providing a second acoustic emission signal, and a filter module (310). The filter module is configured to perform active noise cancellation based on a comparison of the first acoustic emission signal and the second acoustic emission signal.
A seal includes a mating ring that rotates relative to a carbon primary ring at a seal interface. A buffer gas is provided into the seal and passes from the back of the primary ring to the seal interface. The seal can be used as a separation seal or in combination with another seal.
An aspect of the disclosure provides a seal ring for a radial separation seal, the seal ring comprising: a first ring segment comprising a male portion; and, a second ring segment comprising a female portion, wherein the female portion is configured to engage the male portion in the manner of a tongue and groove joint, the joint having: an inner interface at which the first ring segment abuts the second ring segment, the inner interface comprising two inner sealing surfaces and, outer interface at which the first ring segment abuts the second ring segment the outer interface comprising two outer sealing surfaces, wherein the outer interface is radially outward from the inner interface so that when the first ring segment is in an engaged position with the second ring segment in the event that a fluid flow is provided to the inner interface, fluid pressure from the fluid flow pushes the inner sealing surfaces of the inner interface apart to seal the outer interface.
An aspect of the disclosure provides a seal ring for a radial separation seal, the seal ring comprising: a first ring segment comprising a male portion; and, a second ring segment comprising a female portion, wherein the female portion is configured to engage the male portion in the manner of a tongue and groove joint, the joint having: an inner interface at which the first ring segment abuts the second ring segment, the inner interface comprising two inner sealing surfaces and, outer interface at which the first ring segment abuts the second ring segment the outer interface comprising two outer sealing surfaces, wherein the outer interface is radially outward from the inner interface so that when the first ring segment is in an engaged position with the second ring segment in the event that a fluid flow is provided to the inner interface, fluid pressure from the fluid flow pushes the inner sealing surfaces of the inner interface apart to seal the outer interface.
A seal ring for a radial separation seal includes a first ring segment comprising a male portion and a second ring segment comprising a female portion. The female portion is configured to engage the male portion in the manner of a tongue and groove joint. The joint includes an inner interface at which the first ring segment abuts the second ring segment, the inner interface comprising two inner sealing surfaces; and outer interface at which the first ring segment abuts the second ring segment the outer interface comprising two outer sealing surfaces. The outer interface is radially outward from the inner interface so that when the first ring segment is in an engaged position with the second ring segment so that when a fluid flow provided to the inner interface, fluid pressure from the fluid flow pushes the inner sealing surfaces of the inner interface apart.
Coupling members to join two rotary members, such that the coupling members (300) include a unitary body having a first coupling element (302), a second coupling element (304), and a hub (306), wherein the unitary body forms a single piece with the hub (306) extending between and connecting the first coupling element (302) to the second coupling element (304). The first coupling element (302) defines a first plane, the second coupling element (304) defines a second plane with the first and second planes being parallel, and the hub (306) defines a hub axis normal to the first and second planes. Each of the first and second coupling elements (302, 304) comprises a plurality of connection elements (308, 310) arranged about a respective circumference having a respective radius extending from the hub axis, wherein a material of the respective coupling element in a respective circle and in a respective plane is less than the area of the circle. The material forming the first and second coupling elements (302, 304) is arranged in a respective circumscribing circle over an area less than the total area defined by the circle in the respective plane.
F16D 3/72 - Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members with axially-spaced attachments to the coupling parts
A dry gas mechanical seal system configured to inhibit the emission of process gas. The mechanical seal system having tandem first and second stage seals, and a single separation gas supply subsystem configured to direct a supply of separation gas from an inlet through interfacing portions of the first stage seal into a process cavity and from the inlet through the interfacing portions of the second stage seal and out through an outlet to the atmosphere, thereby inhibiting the emission of process gas between a compressor housing and a rotating compressor shaft.
A washpipe cartridge for carrying drilling mud in a top drive of a drilling assembly, the washpipe cartridge comprising: a housing adapted to fit between a stationary goose neck pipe of the top drive and a drill string, wherein the drill string is rotatable about a rotational axis, the housing comprising: a sleeve; and, a housing; wherein the sleeve is configured to provide the drilling mud to the drill string; and, wherein the housing is configured to receive drilling mud from the goose neck pipe; wherein disposed between the sleeve and the housing is a first seal, a second seal and a first gallery between the first seal and the second seal, and wherein the cartridge further comprises: a first gallery inlet for providing a first supply of barrier fluid to the first gallery; a second gallery inlet for providing a second supply of barrier fluid to the second seal, wherein the second gallery inlet is separated from the first gallery by the second seal.
A computer implemented method of determining when to replace a seal component of a seal assembly, the method comprising: obtaining an indication of an accumulation of acoustic emission energy emitted from the seal component over a period of time; determining an estimate of remaining lifetime of the seal component based on the indication.
G01H 1/00 - Measuring vibrations in solids by using direct conduction to the detector
G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
25.
SEAL HEAD ASSEMBLY AND METHOD OF ASSEMBLY OF A SEAL HEAD ASSEMBLY
A seal head assembly comprising: a retainer (301) configured to receive a primary ring (304) therein and comprising an integrated upper detent (305) for retaining said primary ring (304) in the retainer (301); and, a primary ring (304) with a through groove (314) disposed in a radial edge thereof; wherein the through groove (314) is arranged to allow the primary ring (304) to move axially past the upper detent (305) and the primary ring (304) is rotatable in the retainer (301) selectively to align the through groove (314) and the upper detent (305) wherein circumferential alignment of the upper detent (304) with the groove (314) permits axial movement of the primary ring (304) relative to the retainer (301); and, wherein circumferential misalignment of the upper detent (305) with the through groove (314) restrains axial movement of the primary ring (304) relative to the retainer (301).
A computer implemented method of determining when to replace a seal component of a seal assembly includes obtaining an indication of an accumulation of acoustic emission energy emitted from the seal component over a period of time and determining an estimate of remaining lifetime of the seal component based on the indication.
G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
27.
MECHANICAL SEAL ASSEMBLY AND METHOD OF ASSEMBLY OF A MECHANICAL SEAL
The present disclosure relates generally to methods and apparatus, and more particularly to mechanical seals for rotating equipment, and still more particularly to dry gas seals. The present disclosure provides, a primary ring (200) for a mechanical seal in a rotating equipment (2000), the seal comprising a mating ring (101) for co-operation with the primary ring to promote the seal, the primary ring having a central longitudinal axis (104) and comprising: a notch (202) disposed in an outer radial surface of the primary ring, wherein an axial outer edge of the notch is radially deeper than an axially inner part of the notch.
A predictive diagnostics system for monitoring mechanical seals. The system autonomously detects a loss of lubrication within a sliding seal interface of a mechanical seal, the system including a loss of lubrication failure mode logic module configured to monitor data sensed by one or more sensors and diagnose conditions relating to a loss of lubrication within the sliding seal interface, and a plurality of other failure mode logic modules configured to monitor data sensed by the one or more sensors and diagnose conditions relating to specific types of mechanical failures known to occur in mechanical seal systems, the loss of lubrication failure mode logic module configured to determine which of the plurality of other failure mode logic modules are activated during the diagnosis of conditions related to a loss of lubrication within the sliding seal interface.
G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
G01N 29/32 - Arrangements for suppressing undesired influences, e.g. temperature or pressure variations
G01N 29/44 - Processing the detected response signal
F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
G01M 3/26 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
G07C 3/00 - Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
A system and method for monitoring a dry gas seal positionable between a stationary housing and a rotatable shaft. A plurality of sense elements may rotate in response to the rotation of the rotatable shaft and a speed sensor may sense the speed of the rotatable shaft at speeds below one thousand rotations per minute based on sensing the plurality of sense elements. An acoustic emissions sensor may sense when a first seal face and a second seal face forming a seal interface of the dry gas seal are in an operational condition relative to one another. A processor may receive output signals from the speed sensor and the acoustic emissions sensor, and may establish an operating condition of the dry gas seal based on the signal from the speed sensor when the first seal face and the second seal face reach the operational condition relative to one another.
G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
G07C 3/00 - Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
F16J 15/40 - Sealings between relatively-moving surfaces by means of fluid
G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
G01D 5/26 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using optical means, i.e. using infrared, visible or ultraviolet light
G01P 3/44 - Devices characterised by the use of electric or magnetic means for measuring angular speed
A condition monitoring apparatus (300) for a system comprising rotating or reciprocating machinery and a seal is disclosed herein. The apparatus comprises a first acoustic sensor (301) coupled to the seal for providing a first acoustic emission signal, a second acoustic sensor (302) coupled to the rotating or reciprocating machinery for providing a second acoustic emission signal, and a filter module (310). The filter module is configured to perform active noise cancellation based on a comparison of the first acoustic emission signal and the second acoustic emission signal.
A seal includes a mating ring (114) that rotates relative to a porous carbon primary ring (116) at a seal interface. A buffer gas is provided into the seal and passes from the back of the primary ring to the seal interface. The seal can be used as a separation seal or in combination with another seal.
A seal includes a mating ring that rotates relative to a porous carbon primary ring at a seal interface. A buffer gas is provided into the seal and passes from the back of the primary ring to the seal interface. The seal can be used as a separation seal or in combination with another seal.
A dry gas mechanical seal system configured to inhibit the emission of process gas. The mechanical seal system having tandem first and second stage seals, and a single separation gas supply subsystem configured to direct a supply of separation gas from an inlet through interfacing portions of the first stage seal into a process cavity and from the inlet through the interfacing portions of the second stage seal and out through an outlet to the atmosphere, thereby inhibiting the emission of process gas between a compressor housing and a rotating compressor shaft.
A dry gas seal (100) includes a mating ring (114) that can be coupled a the rotating shaft (102) to rotate with the rotating shaft, a retainer ring (117a) that can be fixedly attached to the compressor (104) and a carrier ring (170) moveably coupled to the retainer ring. The carrier ring including a primary ring carrying face (202), a rear face (204) and a sealing surface (200) extending between the primary ring carrying face and the rear face. The sealing surface including an oleophobic coating (210) disposed thereon.
A dry gas seal includes a mating ring that can be coupled a the rotating shaft to rotate with the rotating shaft, a retainer ring that can be fixedly attached to the compressor and a carrier ring moveably coupled to the retainer ring. The carrier ring including a primary ring carrying face, a rear face and a sealing surface extending between the primary ring carrying face and the rear face. The sealing surface including an oleophobic coating disposed thereon.
Coupling members to join two rotary members are described. The coupling members (300) include a unitary body having a first coupling element (302), a second coupling element (304), and a hub (306), wherein the unitary body forms a single piece with the hub (306) extending between and connecting the first coupling element (302) to the second coupling element (304). The first coupling element (302) defines a first plane, the second coupling element (304) defines a second plane with the first and second planes being parallel, and the hub (306) defines a hub axis normal to the first and second planes. Each of the first and second coupling elements (302, 304) comprises a plurality of connection elements (308, 310) arranged about a respective circumference having a respective radius extending from the hub axis., wherein a material of the respective coupling element in a respective circle and in a respective plane is less than the area of the circle. The material forming the first and second coupling elements (302, 304) is arranged in a respective circumscribing circle over an area less than the total area defined by the circle in the respective plane.
F16D 3/72 - Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members with axially-spaced attachments to the coupling parts
37.
UNITARY YIELDING COUPLING MEMBER WITH AXIALLY SPACED CONNECTIONS TO JOIN TWO ROTARY MEMBERS
Coupling members to join two rotary members are described. The coupling members (300) include a unitary body having a first coupling element (302), a second coupling element (304), and a hub (306), wherein the unitary body forms a single piece with the hub (306) extending between and connecting the first coupling element (302) to the second coupling element (304). The first coupling element (302) defines a first plane, the second coupling element (304) defines a second plane with the first and second planes being parallel, and the hub (306) defines a hub axis normal to the first and second planes. Each of the first and second coupling elements (302, 304) comprises a plurality of connection elements (308, 310) arranged about a respective circumference having a respective radius extending from the hub axis. The material forming the first and second coupling elements (302, 304) is arranged within a respective circumscribing circle over an area which is less than the total area defined by the circle in the respective planes.
F16D 3/72 - Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members with axially-spaced attachments to the coupling parts
38.
Systems and methods for predictive diagnostics for mechanical systems
A predictive diagnostics system for monitoring mechanical seals. The system autonomously detects a loss of lubrication within a sliding seal interface of a mechanical seal, the system including a loss of lubrication failure mode logic module configured to monitor data sensed by one or more sensors and diagnose conditions relating to a loss of lubrication within the sliding seal interface, and a plurality of other failure mode logic modules configured to monitor data sensed by the one or more sensors and diagnose conditions relating to specific types of mechanical failures known to occur in mechanical seal systems, the loss of lubrication failure mode logic module configured to determine which of the plurality of other failure mode logic modules are activated during the diagnosis of conditions related to a loss of lubrication within the sliding seal interface.
G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
G01N 29/32 - Arrangements for suppressing undesired influences, e.g. temperature or pressure variations
G01N 29/44 - Processing the detected response signal
G01M 3/26 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
G07C 3/00 - Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
39.
Dry gas seal with electronically controlled carrier load
A mechanical seal assembly with an electronically controllable carrier load. The assembly includes a magnetic ring affixed to the carrier and driven by a solenoid. The solenoid can apply an axial force to the carrier. The carrier load can be controlled to prevent or reduce friction between the primary ring and mating ring in slow-roll running conditions by partially or completely compensating a spring force provided by a biasing mechanism. The carrier load can further be controlled to inhibit seal hang-up. In embodiments, desired the carrier load can be determined by rotational speed. In embodiments, carrier load can be determined based on sensor signals.
A predictive diagnostics system for monitoring mechanical seals. The system autonomously detects a loss of lubrication within a sliding seal interface of a mechanical seal, the system including a loss of lubrication failure mode logic module configured to monitor data sensed by one or more sensors and diagnose conditions relating to a loss of lubrication within the sliding seal interface, and a plurality of other failure mode logic modules configured to monitor data sensed by the one or more sensors and diagnose conditions relating to specific types of mechanical failures known to occur in mechanical seal systems, the loss of lubrication failure mode logic module configured to determine which of the plurality of other failure mode logic modules are activated during the diagnosis of conditions related to a loss of lubrication within the sliding seal interface.
G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
G01N 29/32 - Arrangements for suppressing undesired influences, e.g. temperature or pressure variations
G01N 29/44 - Processing the detected response signal
G01M 3/26 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
G07C 3/00 - Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
A system and method for monitoring a dry gas seal positionable between a stationary housing (18) and a rotatable shaft (29). A plurality of sense elements (44) may rotate in response to the rotation of the rotatable shaft (20) and a speed sensor (17) may sense the speed of the rotatable shaft at speeds below one thousand rotations per minute based on sensing the plurality of sense elements (44). An acoustic emissions sensor (19) may sense when a first seal face and a second seal face forming a seal interface of the dry gas seal are in an operational condition relative to one another. A processor (11) may receive output signals from the speed sensor (17) and the acoustic emissions sensor (19), and may establish an operating condition of the dry gas seal based on the signal from the speed sensor when the first seal face and the second seal face reach the operational condition relative to one another.
F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
G01B 1/00 - Measuring instruments characterised by the selection of material therefor
G01M 3/24 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
G01P 13/04 - Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
A system and method for monitoring a dry gas seal positionable between a stationary housing (18) and a rotatable shaft (29). A plurality of sense elements (44) may rotate in response to the rotation of the rotatable shaft (20) and a speed sensor (17) may sense the speed of the rotatable shaft at speeds below one thousand rotations per minute based on sensing the plurality of sense elements (44). An acoustic emissions sensor (19) may sense when a first seal face and a second seal face forming a seal interface of the dry gas seal are in an operational condition relative to one another. A processor (11) may receive output signals from the speed sensor (17) and the acoustic emissions sensor (19), and may establish an operating condition of the dry gas seal based on the signal from the speed sensor when the first seal face and the second seal face reach the operational condition relative to one another.
F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
G01B 1/00 - Measuring instruments characterised by the selection of material therefor
G01M 3/24 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
G01P 13/04 - Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
A system and method for monitoring a dry gas seal (22) positionable between a stationary housing (18) and a rotatable shaft (20). A plurality of sense elements (44) may rotate in response to the rotation of the rotatable shaft and a speed sensor (17) may sense the speed of the rotatable shaft (20) at speeds below one thousand rotations per minute based on sensing the plurality of sense elements (44). A processor (11) may receive output signals from the speed sensor (17) and may establish a position of the dry gas seal or an operating condition of the dry gas seal (22) based on the signal from the speed sensor (17).
F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
G01B 1/00 - Measuring instruments characterised by the selection of material therefor
G01M 3/24 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
G01P 13/04 - Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
G01B 7/00 - Measuring arrangements characterised by the use of electric or magnetic techniques
G01B 7/14 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
G01P 3/488 - Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors
A system and method for monitoring a dry gas seal positionable between a stationary housing and a rotatable shaft. A plurality of sense elements may rotate in response to the rotation of the rotatable shaft and a speed sensor may sense the speed of the rotatable shaft at speeds below one thousand rotations per minute based on sensing the plurality of sense elements. An acoustic emissions sensor may sense when a first seal face and a second seal face forming a seal interface of the dry gas seal are in an operational condition relative to one another. A processor may receive output signals from the speed sensor and the acoustic emissions sensor, and may establish an operating condition of the dry gas seal based on the signal from the speed sensor when the first seal face and the second seal face reach the operational condition relative to one another.
G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
F16J 15/40 - Sealings between relatively-moving surfaces by means of fluid
G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
G01D 5/26 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using optical means, i.e. using infrared, visible or ultraviolet light
F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
G07C 3/00 - Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
G01P 3/44 - Devices characterised by the use of electric or magnetic means for measuring angular speed
A system and method for monitoring a dry gas seal positionable between a stationary housing and a rotatable shaft. A plurality of sense elements may rotate in response to the rotation of the rotatable shaft and a speed sensor may sense the speed of the rotatable shaft at speeds below one thousand rotations per minute based on sensing the plurality of sense elements. A processor may receive output signals from the speed sensor and may establish a position of the dry gas seal or an operating condition of the dry gas seal based on the signal from the speed sensor.
F16J 15/40 - Sealings between relatively-moving surfaces by means of fluid
G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
G01D 5/26 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using optical means, i.e. using infrared, visible or ultraviolet light
F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
G07C 3/00 - Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
G01P 3/44 - Devices characterised by the use of electric or magnetic means for measuring angular speed
A dry gas mechanical seal system configured to inhibit the emission of process gas. The mechanical seal system having tandem first and second stage seals, and a single separation gas supply subsystem configured to direct a supply of separation gas from an inlet through interfacing portions of the first stage seal into a process cavity and from the inlet through the interfacing portions of the second stage seal and out through an outlet to the atmosphere, thereby inhibiting the emission of process gas between a compressor housing and a rotating compressor shaft.
A mechanical seal assembly with an electronically controllable carrier load. The assembly includes a magnetic ring affixed to the carrier and driven by a solenoid. The solenoid can apply an axial force to the carrier. The carrier load can be controlled to prevent or reduce friction between the primary ring and mating ring in slow-roll running conditions by partially or completely compensating a spring force provided by a biasing mechanism. The carrier load can further be controlled to inhibit seal hang-up. In embodiments, desired the carrier load can be determined by rotational speed. In embodiments, carrier load can be determined based on sensor signals.
A mechanical seal assembly with an electronically controllable carrier load. The assembly includes a magnetic ring affixed to the carrier and driven by a solenoid. The solenoid can apply an axial force to the carrier. The carrier load can be controlled to prevent or reduce friction between the primary ring and mating ring in slow-roll running conditions by partially or completely compensating a spring force provided by a biasing mechanism. The carrier load can further be controlled to inhibit seal hang-up. In embodiments, desired the carrier load can be determined by rotational speed. In embodiments, carrier load can be determined based on sensor signals.
A mechanical seal system configured to inhibit the emission of process gas from a rotating machine. An annular plunger is axially slidable between a inboard closed position and an outboard open position such that when the plunger is in the closed position, the plunger inhibits the flow of the sealing fluid between the inlet passageway to the seal interface, and when the plunger is in the closed position, the plunger enables the flow of the sealing fluid between the inlet passageway and the seal interface. A biasing mechanism and solenoid provide opening and closing forces to the plunger. Normally-open and normally-closed configurations are provided.
A dry gas mechanical seal system configured to inhibit the emission of process gas. The mechanical seal system having tandem first and second stage seals, and a single separation gas supply subsystem configured to direct a supply of separation gas from an inlet through interfacing portions of the first stage seal into a process cavity and from the inlet through the interfacing portions of the second stage seal and out through an outlet to the atmosphere, thereby inhibiting the emission of process gas between a compressor housing and a rotating compressor shaft.
A mechanical seal system configured to inhibit the emission of process gas from a rotating machine. An annular plunger is axially slidable between a inboard closed position and an outboard open position such that when the plunger is in the closed position, the plunger inhibits the flow of the sealing fluid between the inlet passageway to the seal interface, and when the plunger is in the closed position, the plunger enables the flow of the sealing fluid between the inlet passageway and the seal interface. A biasing mechanism and solenoid provide opening and closing forces to the plunger. Normally-open and normally-closed configurations are provided.
A dry gas mechanical seal system configured to inhibit the emission of process gas. The mechanical seal system having tandem first and second stage seals, and a single separation gas supply subsystem configured to direct a supply of separation gas from an inlet through interfacing portions of the first stage seal into a process cavity and from the inlet through the interfacing portions of the second stage seal and out through an outlet to the atmosphere, thereby inhibiting the emission of process gas between a compressor housing and a rotating compressor shaft.
A mechanical seal system configured to inhibit the emission of process gas from a rotating machine. An annular plunger is axially slidable between a inboard closed position and an outboard open position such that when the plunger is in the closed position, the plunger inhibits the flow of the sealing fluid between the inlet passageway to the seal interface, and when the plunger is in the closed position, the plunger enables the flow of the sealing fluid between the inlet passageway and the seal interface. A biasing mechanism and solenoid provide opening and closing forces to the plunger. Normally-open and normally-closed configurations are provided.
A dry gas mechanical seal system configured to inhibit the emission of process gas. The mechanical seal system having tandem first and second stage seals, and a single separation gas supply subsystem configured to direct a supply of separation gas from an inlet through interfacing portions of the first stage seal into a process cavity and from the inlet through the interfacing portions of the second stage seal and out through an outlet to the atmosphere, thereby inhibiting the emission of process gas between a compressor housing and a rotating compressor shaft.
A predictive diagnostics system for monitoring mechanical seals. The system autonomously detects a loss of lubrication within a sliding seal interface of a mechanical seal, the system including a loss of lubrication failure mode logic module configured to monitor data sensed by one or more sensors and diagnose conditions relating to a loss of lubrication within the sliding seal interface, and a plurality of other failure mode logic modules configured to monitor data sensed by the one or more sensors and diagnose conditions relating to specific types of mechanical failures known to occur in mechanical seal systems, the loss of lubrication failure mode logic module configured to determine which of the plurality of other failure mode logic modules are activated during the diagnosis of conditions related to a loss of lubrication within the sliding seal interface.
CA 03015495 2018-08-22(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)(19) World Intellectual Property -,Organization....- 11111111011110111010101111101011111011101011101111101111110111111111011110111111International Bureau ........Yejd .......,,,' (10) International Publication Number(43) International Publication Date WO 2017/147297 Al31 August 2017 (31.08.2017) WIPO I PCT(51) International Patent Classification: Slough Berkshire SL1 4LU (GB). NARAYANASWAMY,F 16J 15/34 (2006.01) F16J 15/16 (2006.01) Kamesh; c/o JOHN CRANE UK LTD., BuckinghamGO1M 13/00 (2006.01) House, 361-366 Buckingham Avenue, Slough BerkshireSL1 4LU (GB). PARMAR, Murat; c/o JOHN CRANE(21) International Application Number:UK LTD., Bucki PCT/U52017/019139 ngham House, 361-366 Buckingham Av-enue, Slough Berkshire SL1 4LU (GB). UNSWORTH,(22) International Filing Date: David; c/o JOHN CRANE UK LTD., Buckingham House,23 February 2017 (23.02.2017) 361-366 Buckingham Avenue, Slough Berkshire SL1 4LU(GB). ZHU, Xiaoran; c/o JOHN CRANE UK LTD., Buck-(25) Filing Language: English ingham House, 361-366 Buckingham Avenue, Slough(26) Publication Language: English Berkshire SL1 4LU (GB).(30) Priority Data: (74) Agents: PATTERSON, James H. et al.; Patterson62/298,839 23 February 2016 (23.02.2016) US Thuente Pedersen, P.A., 4800 IDS Center, 80 South 8th62/298,851 23 February 2016 (23.02.2016) US Street, Minneapolis, Minnesota 55402 (US).62/298,848 23 February 2016 (23.02.2016) US (81) Designated States (unless otherwise indicated, for every62/298,814 23 February 2016 (23.02.2016) US kind of national protection available): AE, AG, AL, AM,62/302,451 2 March 2016 (02.03.2016) US AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW BY,62/302,458 2 March 2016 (02.03.2016) US BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK,, DM,(71) Applicant: JOHN CRANE UK LTD. [GB/GB]; Bucking- DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT,ham House, 361-366 Buckingham Avenue, Slough, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN,Berkshire SL1 4LU (GB). KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA,= MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG,(72) Inventors: MECK, Klaus-Dieter; c/o JOHN CRANE UK NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS,LTD., Buckingham House, 361-366 Buckingham Avenue,=[Continued on next page]__ (54) Title: SYSTEMS AND METHODS FOR PREDICTIVE DIAGNOSTICS FOR MECHANICAL SYSTEMS. (57) Abstract: A predictive diagnostics system for monitoring mech-anical seals. The system autonomously detects a loss of lubrication=within a sliding seal interface of a mechanical seal, the system in- = 4942Receivecluding a loss of lubrication failure mode logic module configured to = csag.:L.i_ monitor data sensed by one or more sensors and diagnose conditionsLOA 1 relating to a loss of lubrication within the sliding seal interface, and aLiondor Sanger= Dale. foiStexti plurality of other failure mode logic modules configured to monitor state i=data sensed by the one or more sensors and diagnose conditions re-= lating to specific types of mechanical failures known to occur in1 kagg= 1 EstabligtTheesholds mechanical seal systems, the loss of lubrication failure mode logic=module configured to determine which of the plurality of other fail-= . I Bg12 ure mode logic modules are activated during the diagnosis of condi-= .1 TrStee Data lai Paaus tions related to a loss of lubrication within the sliding seal interface.,4, NEU=MedRCNN.Zzed? /=6016 FT seams= /NN11 Row2 I in= ,,>".4 N ,,,,,qINC:r ei FIG. 8IN11'11IN11eiCDCA 03015495 2018-08-22WO 2017/147297 Al 111111111111111111111111111111111110111111111111111111111111111111111111111111#11111111RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT,TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE,VN, ZA, ZM, ZW. SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA,GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG).(84) Designated States (unless otherwise indicated, for everykind of regional protection available): ARIPO (BW, GH, Published:GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ,¨ with international search report (Art. 21(3))TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU,TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE,
F16J 15/16 - Sealings between relatively-moving surfaces
F16J 15/3296 - Arrangements for monitoring the condition or operation of elastic sealingsArrangements for control of elastic sealings, e.g. of their geometry or stiffness
F16N 29/00 - Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditionsUse of devices responsive to conditions in lubricating arrangements or systems
A predictive diagnostics system for monitoring mechanical seals. The system autonomously detects a loss of lubrication within a sliding seal interface of a mechanical seal, the system including a loss of lubrication failure mode logic module configured to monitor data sensed by one or more sensors and diagnose conditions relating to a loss of lubrication within the sliding seal interface, and a plurality of other failure mode logic modules configured to monitor data sensed by the one or more sensors and diagnose conditions relating to specific types of mechanical failures known to occur in mechanical seal systems, the loss of lubrication failure mode logic module configured to determine which of the plurality of other failure mode logic modules are activated during the diagnosis of conditions related to a loss of lubrication within the sliding seal interface.
G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
G01M 3/26 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
G07C 3/00 - Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
An apparatus for detecting fatigue induced failure of an assembly having a single flexible element or a series of flexible elements stacked in juxtaposed engagement, for transmitting power from one component to another, the assembly having a cyclic operating speed frequency that includes at least one sensor mounted in proximity to said assembly, the sensor providing an analog signal corresponding to an airborne acoustic signal emitted by the assembly, means for amplifying the analog signal, filter means to reduce background noise from the analog signal, an analog to digital converter for converting the analog signals to a digital signal, means for sampling the digital signals in respect of the operating speed frequency of the assembly and means for analyzing the digital signals and providing an output upon the occurrence of one or more digital signal spikes in an operating cycle.
G01N 29/44 - Processing the detected response signal
F16D 3/79 - Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members shaped as an elastic disc or flat ring, arranged perpendicular to the axis of the coupling parts, different sets of spots of the disc or ring being attached to each coupling part, e.g. Hardy couplings the disc or ring being metallic
G01H 3/08 - Analysing frequencies present in complex vibrations, e.g. comparing harmonics present
An elastomeric or polymeric seal assembly (10) includes an annular elastomeric or polymeric sealing element (60), an internal circumferential surface of which sealingly engaging a first component (12), the sealing element abutting a radial annular face of a second component (16) and an external circumferential surface of the sealing element sealingly engaging an internal circumferential surface of a second component, a vent (92) being provided in the internal circumferential surface of the second component adjacent to the radial face, to vent the space between the external circumferential surface of the sealing element and the internal circumferential surface of the second component, an inlet to the vent being defined by an annular groove (88) in the internal circumferential surface of the second component, an annular helically wound element (94) being provided in the annular groove to prevent extrusion of the sealing element into the vent, the helically wound element being formed from a strip of material of elongate section, adjacent winds of material being spaced from one another.
An apparatus for detecting fatigue induced failure of an assembly having a single flexible element or a series of flexible elements stacked in juxtaposed engagement, for transmitting power from one component to another, the assembly having a cyclic operating speed frequency includes at least one sensor mounted in proximity to said assembly, the sensor providing an analogue signal corresponding to an airborne acoustic signal emitted by the assembly, means for amplifying the analogue signal, filter means to reduce background noise from the analogue signal, an analogue to digital converter for converting the analogue signals to a digital signal, means for sampling the digital signals in respect of the operating speed frequency of the assembly and means for analysing the digital signals and providing an output upon the occurrence of one or more digital signal spikes in an operating cycle.
A seal assembly having a first seal ring sealed to a rotatable component and a second seal ring sealed to another rotatable component, and the second ring is urged towards the first ring such that sealing faces of the seal rings engage. A process chamber is formed inside the seal rings and opens to an outside the seal rings, and a barrier chamber outside of the seal rings opens to inside the seal rings. A shroud shields the external surface of the seal rings from process fluid in the process chamber such that heat transfer from the process fluid to the seal rings occurs at outer regions of the seal rings adjacent the sealing faces, and a sleeve is secured inside the seal rings such that heat transfer between the seal rings and barrier fluid in the barrier chamber occurs at radially extending surfaces of the seal rings adjacent the sealing faces.
A seal assembly for providing a seal between a pair of relatively rotatable components has; a first seal ring (30) mounted in sealing relationship, non- rotatably and for limited axial movement on a first of the components; a second seal (50) ring mounted in axially aligned relationship to the first seal ring, said second seal ring being mounted in sealing relationship, non-rotatably and for limited axial movement on a second of the components; first resilient means associated with the second seal ring urging it axially towards the first seal ring,- second resilient means (40) acting on the first seal ring urging it away from the second seal ring to separate the first and second seal rings; and a centrifugal actuator (20) associated with the first seal ring, said centrifugal actuator comprising a radially extending chamber (38) between the first seal ring and the component associated therewith, said chamber being connected to a source of fluid, whereby when the components rotate relative to one another with fluid in the chamber, centrifugal pressurisation of the fluid in the chamber will apply an axial load to the first seal ring urging it axially against the second resilient means and a sealing face of the first seal ring into sealing engagement with a sealing face of the second seal ring.
A tolerance strip (50) is formed a strip of resilient material with corrugations (54), the corrugations extending transversely across the full width of the strip, the corrugations defining crests (56) with troughs (58) between adjacent corrugations, a central portion of the corrugations being of substantially uniform height across the strip, portions (60) of the corrugations adjacent each longitudinal edge of the strip decreasing in height towards the edge of the strip.
A seal assembly for providing a seal between a pair of components has a sealing ring made of flexible plastics material and a backup ring (70) made of resiliently flexible plastics material being located coaxially of the sealing ring on the side thereof remote from the limbs, the backup ring abutting a f rusto-conical surface (62) of a base of the sealing ring, said frusto-conical surface engaging a corresponding frusto-conical surface (74) of the backup ring, to apply a radial load to the inner periphery of the backup ring urging it towards the outer periphery of the inner component, when an axial load is applied to the sealing ring by exposure of the sealing ring to pressure from the side of the sealing ring to which the limbs extend, a projection (72) on the backup ring engaging an inner periphery of an axially extending annular recess (80) in the outer component, to locate and support the reinforcing ring radially.
An internally pressurised seal (10) assembly has a first seal ring (40) mounted in fixed axial and rotational relationship and sealed with respect to one of a pair of relatively rotatable components and a second seal ring (100) moveable axially but fixed rotationally and sealed with respect to the other of the pair of relatively rotatably components, the second seal ring is urged resiliently towards the first seal ring, so that a radial sealing face of the first seal ring engages a radial sealing face of the second seal ring, a process chamber (22) is formed at the inboard side of the seal rings, said process chamber opening to the outside of the seal rings, and a barrier chamber (16) is provided at the outboard side of the seal rings, the barrier chamber opening to the inside of the seal rings, the external circumferential surface of the seal rings are shielded from process fluid in the process chamber by shroud members (62) which ensure that heat transfer from the process fluid to the seal rings predominantly occurs at the outer regions of the seal rings adjacent the sealing faces, and a sleeve (70) is secured internally of each seal ring which ensure that heat transfer between the seal rings and a barrier fluid in the barrier chamber predominantly occurs at the radially extending surfaces of the seal rings adjacent the sealing faces.
An internally pressurised seal (10) assembly has a first seal ring (40) mounted in fixed axial and rotational relationshipand sealed with respect to one of a pair of relatively rotatable components and a second seal ring (100) moveable axially but fixed rotationally and sealed with respect to the other of the pair of relatively rotatably components, the second seal ring is urged resiliently towards the first seal ring, so that a radial sealing face of the first seal ring engages a radial sealing face of the second seal ring, a process chamber (22) is formed at the inboard side of the seal rings, said process chamber opening to the outside of the seal rings, and a barrier chamber (16) is provided at the outboard side of the seal rings, the barrier chamber opening to the inside of the seal rings, the external circumferential surface of the seal rings are shielded from process fluid in the process chamber by shroud members (62) which ensure that heat transfer from the process fluid to the seal rings predominantly occurs at the outer regionsof the seal rings adjacent the sealing faces, and a sleeve (70) is secured internally of each seal ring which ensure that heat transfer between the seal rings and a barrier fluid in the barrier chamber predominantly occurs at the radially extending surfaces of the seal rings adjacent the sealing faces.
A seal ( 10, 1 2) having a mating ring ( 100, 100') mounted in fixed axial and rotational relationship with respect to a shaft ( 14) and a primary ring ( 120, 1 20') mounted in fixed rotational relationship but moveable axially with respect to a housing assembly ( 16); springs (136) being provided to urge the primary ring ( 120, 120') axially into sealing engagement with the mating ring ( 100, 100'), the mating ring ( 100, 100') being mounted with respect to said shaft ( 14) in abutment with a first radial face (44,62), characterised in that a circumferential surface of said mating ring ( 100, 100') is spaced radially from a circumferential surface on the shaft ( 14) and an annular helical spring element ( 104) is located, under radial compression, between said circumferential surfaces, the annular helical spring element ( 104) being formed from wire of elongate section, the axial width of the section being greater than the radial thickness.
A seal has a first and second seal assembly and a barrier chamber (124) therebetween, each seal assembly has a mating ring (64) mounted in fixed axial and rotational relationship to a shaft (14) and a primary ring (l00)mounted in fixed rotatable relationship but moveable axially of a housing (20), a thrust ring (110) acting on one side of the primary ring urging a radial sealing face (116) of the primary ring into engagement with a radial sealing face (118) of the mating ring, one of said seal assemblies being located inboard, the thrust ring of said inboard seal assembly acting between the primary ring and an annular piston (84), the annular piston being pressure balanced such that when pressure in the barrier chamber is in excess of the pressure of the process fluid (P), the piston will be urged towards the seal chamber; and when pressure in the barrier chamber is lower than the pressure of the process fluid, the piston will be urged towards the barrier chamber (P).
A fermentation apparatus (10) with a fermentation vessel (12) having a low speed stirrer, the stirrer comprising a shaft (14) entering the vessel through an aperture (16) in the bottom of the vessel, one or more stirring elements (18) being mounted on the shaft for rotation therewith within the vessel; a seal (20) being provided to seal the gap between the shaft and aperture, the seal being located in a cylindrical housing attached to the bottom of the vessel, the seal having first and second seal assemblies (30, 50) spaced axially of one another to define a chamber (64) therebetween, an inlet (66) opening into said chamber for connection of the chamber to a supply of processing gas, the first seal assembly (30) being located between the fermentation vessel and the chamber comprising a seat (32) mounted on the shaft for rotation therewith and a mating ring mounted (36) in fixed rotational relationship but moveably axially of the housing, a sealing face (44) of the mating ring being resiliently biased into engagement with a sealing face (42) of the seat, the sealing face of one of the mating ring or the seat having grooves (68) , which will provide hydrodynamic separation of the sealing faces upon rotation of the shaft .
09 - Scientific and electric apparatus and instruments
Goods & Services
Printed publications in electronically, magnetically or optically recorded and readable forms, all relating to industrial seals and gas seals; magazines in electronic form relating to seals; and publications accessible via the Internet, all relating to seals.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
09 - Scientific and electric apparatus and instruments
17 - Rubber and plastic; packing and insulating materials
Goods & Services
Seals, seals for gas equipment, packings, gaskets, gas couplings, gas seal systems, and parts and fittings for all the aforesaid goods, all wholly or principally of metal. Rotary mechanical seals and parts therefor for machine use. Gas control and monitoring equipment, gas seal controls, and parts and fittings for all the aforesaid goods. Seals, seals for gas equipment, packings, gaskets, gas couplings, gas seal systems, and parts and fittings for all the aforesaid goods, all wholly or principally of non-metal.
17 - Rubber and plastic; packing and insulating materials
37 - Construction and mining; installation and repair services
Goods & Services
Couplings for rotary shafts; flexible drives for transmission of power. Packings and jointings in the nature of packings; mechanical seals. Construction and repair services.
MACHINE PARTS, NAMELY GEARS, GEAR COUPLINGS AND FLEXIBLE POWER TRANSMISSION APPARATUS; PARTS AND FITTINGS FOR THE AFORESAID GOODS, NAMELY HUBS, HOLDING RINGS AND LOCKING SET SCREWS
77.
Performance Plus Providing Total Process Improvement & Optimisation
37 - Construction and mining; installation and repair services
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Business management services; business administration; office functions; business management assistance; business management and organisation consulting; personnel management consulting; analysis of business factors; business research; business planning services; management of key processes; inventory management; oilfield water management services; consultancy, advisory and information services relating to all the aforesaid. Consultancy, advisory and information services relating to the installation, maintenance and repair of environmental control systems; consultancy, advisory and information services relating to the construction and repair of civil engineering structures; consultancy, advisory and information services relating to the construction and repair of mechanical engineering structures; civil engineering; civil engineering (construction) consultancy; civil engineering relating to water irrigation; coating services for the maintenance of industrial engineering plant; coating services for the repair of industrial engineering plant; construction engineering; construction engineering consultancy services; engineering; engineering (construction-); installation of environmental engineering systems; maintenance and repair services relating to engineering products; marine engineering; mechanical and electrical engineering; on-site construction supervision of civil engineering works; project preparation relating to civil engineering; project preparation relating to construction engineering; structural engineering; supervision of the engineering of buildings; irrigation devices installation and repair; machinery installation, maintenance and repair; maintaining and repair of drain pipes; maintenance and repair of building contents; maintenance and repair of buildings; maintenance and repair of construction apparatus; maintenance and repair of construction machines; consultancy, advisory and information services relating to the repair of civil engineering services; consultancy, advisory and information services relating to the repair of drainage installations; consultancy, advisory and information services relating to the repair of environmental control systems; consultancy, advisory and information services relating to the repair of mechanical engineering structures; consultancy services relating to the repair of buildings; consultancy services relating to the repair of steam condensing installations; consultancy services relating to the repair of stem-generating installations; electrical apparatus repair; furnace installation and repair. Educational services; training services; teaching services; arranging and organising seminars, conventions, conferences and exhibitions; technical training; advisory and information services relating to all the aforesaid. Consultancy, advisory, educational, training, business, information, technical advice and development services; all relating to process industries; feasibility studies relating to process industries; failure analysis; consultancy and advisory services relating to operational practices of plant and machinery; consultancy and advisory services relating to improved efficiency of plant and machinery; consultancy and information services relating to environmental pollution and protection; compilation of environmental information and information relating to environmental conditions; consultancy services relating to environmental planning; environmental conservation; environmental consultancy services; environmental hazard assessment; environmental monitoring of waste storage and treatment areas; environmental surveys; environmental testing; environmental testing of exhaust emissions; environmental testing of noise pollution; environmental testing of vibration; investigation services relating to environmental pollution; research relating to environmental protection; computer engineering consultancy services; design engineering; electrical engineering services; engineering consultancy; engineering consultancy relating to computer programming; engineering consultancy relating to testing; engineering design and drawing; engineering feasibility studies; engineering project management services; engineering project studies; engineering research; engineering services for the analysis of machinery; engineering services for the analysis of structures, engineering services for the design of machinery; engineering services for the design of structures; engineering services relating to machine tool design; engineering services relating to the design of electronic systems; industrial engineering design services; industrial testing of engineering works; measuring the environment within civil engineering structures; advisory and information services relating to all the aforesaid.
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40 - Treatment of materials; recycling, air and water treatment,
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