Labyrinth Patents (Class 277/303)
  • Patent number: 9784371
    Abstract: Described is a brush seal for sealing between a first component and a second component which relatively rotate during normal use, comprising: an annular housing which is attached to a first component in use; a plurality of bristles each having a fixed end attached to the housing and a free end, wherein the free ends of at least some of the plurality of bristles contact the second component during normal use to provide a sealing surface, wherein the sealing surface includes a plurality of discontinuities around the circumference of the brush seal for providing hydrodynamic lifting force in use.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: October 10, 2017
    Assignee: ROLLS-ROYCE plc
    Inventors: Gervas Franceschini, Terence Valentine Jones, Felix Lepetit
  • Patent number: 9726040
    Abstract: A fluid delivery assembly for delivering fluid to a component in a gas turbine engine includes a rotating shaft having a central bore and at least one fluid exhaust in communication with the central bore for centrifugally expelling fluid, and a delivery scoop disposed around the rotating shaft and spaced apart from the rotating shaft by an annular gap. The delivery scoop includes an annular body having at least one impingement surface facing the at least one fluid exhaust and configured to scoop the fluid expelled by the at least one fluid exhaust. The impingement surface has at least one outlet for delivering the scooped fluid to the component. A method of delivering pressurised fluid in a fluid system is also presented.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: August 8, 2017
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Eugene Gekht, Pierre-Yves Legare, Thomas Francis Haslam-Jones
  • Patent number: 9574453
    Abstract: A steam turbine is provided. The steam turbine includes a housing and a steam inlet configured to discharge a primary steam flow within the housing. A stator is coupled to the housing and a rotor is coupled to the housing and located within the stator. The rotor and the stator are configured to define a primary flow path there between and in flow communication with the primary steam flow. The steam turbine includes a seal assembly coupled to the housing. The seal assembly includes a packing head and a plurality of seals. The packing head is configured to define a cooling flow path in flow communication with the rotor and configured to discharge a cooling steam flow toward the rotor. An anti-swirl device is coupled to the seal assembly and located between the rotor and the packing head.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: February 21, 2017
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Thomas Joseph Farineau, Sacheverel Quentin Eldrid, Jason L. Bowers
  • Patent number: 9562608
    Abstract: A rotary shaft and a seal mechanism are provided. The rotary shaft extends into outside air outside a case via a shaft hole provided in the case of a drive system. The seal mechanism prevents entry of foreign matter from the outside air into the shaft hole. The case includes a canopy portion and a recessed portion. The recessed portion is recessed coaxially with the canopy portion from an end face of the canopy portion in the direction of the axis. The seal mechanism includes a deflector and a seal member. The deflector is fixed to the rotary shaft in a liquid-tight manner, and extends into the recessed portion. The seal member is an elastic body. The seal member is fixed in the shaft hole in a liquid-tight manner, and is in sliding contact in a liquid-tight manner with the rotary shaft and the deflector.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: February 7, 2017
    Assignees: AISIN SEIKI KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tsuyoshi Kimura, Noriaki Nonaka, Yasuaki Tahara, Atsushi Kajikawa, Masaya Michishita, Hirofumi Goto, Tadashi Yamada, Yoshihiro Ikushima
  • Patent number: 9528384
    Abstract: A brush seal is provided having a brush housing having a back plate and a front plate, a first layer of bristles disposed adjacent to the back plate, where at least one of the first layer of bristles has a first diameter. A second layer of bristles are disposed adjacent to the first layer of bristles, and at least one of the second layer of bristles has a second diameter. A third layer of bristles are disposed adjacent to the second layer of bristles, and at least one of the third layer of bristles has a third diameter. The first diameter and the third diameter are larger than the second diameter.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: December 27, 2016
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Bernard Arthur Couture, Jr., Michael John Bowman, William Edward Adis, Michael Dennis Mack, Kim James Clark
  • Patent number: 9512922
    Abstract: Sealing apparatus and engine are provided. A sealing apparatus includes a first cover plate, a second cover plate spaced apart from the first cover plate, and a sealing element disposed between the first cover plate and the second cover plate and including at least two diaphragm members, wherein a first diaphragm member has a first stiffness and a second diaphragm member has a second stiffness that is different than the first stiffness. The sealing apparatus may be disposed in an engine.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: December 6, 2016
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Don Takeuchi, Nathan Gibson, Tina Hynes
  • Patent number: 9377108
    Abstract: A compliant plate seal assembly for a turbo machine includes a rotor and a stationary component. A plurality of compliant plates are coupled circumferentially to the stationary component. A natural frequency of each compliant plate varies from a natural frequency of adjacent compliant plates and/or gaps between adjacent plates to produce a zero-oscillation state between adjacent compliant plates in flow.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: June 28, 2016
    Assignee: General Electric Company
    Inventors: Deepak Trivedi, Hrishikesh Vishvas Deo
  • Patent number: 9347333
    Abstract: A brush ring seal device for installation within a packing case of a turbine includes: a brush seal carrier having a substantially ring-shaped body portion having a front face, a rear face, an inner circumferential groove, and an outer circumferential groove; a brush seal mounted within the inner circumferential groove of the brush seal carrier; and a ring-shaped spring mounted within the outer circumferential groove of the brush seal carrier. The rear face of the brush seal carrier is coated with an anti-friction coating, thereby allowing movement of the brush ring seal device within the packing case.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: May 24, 2016
    Assignee: Elliott Company
    Inventor: Michael Arthen Mindock, III
  • Patent number: 9267387
    Abstract: A partial seal platform for mounting a seal and securing seal to a rotor or a casing including a first arcuate securing segment with a first securing notch for receiving a first securing ridge of rotor or casing; a second arcuate securing segment with a second securing notch for receiving a second securing ridge of rotor or casing; an arcuate coupling segment with a first flat ridge forming a first and second lateral notch on each side of the first flat ridge for receiving the first arcuate securing segment and the second arcuate securing segment; and an arcuate mounting segment including a second flat ridge forming a lateral notch on each side of second flat ridge for receiving first arcuate securing segment and second arcuate securing segment.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: February 23, 2016
    Assignee: General Electric Company
    Inventors: Thomas Joseph Farineau, Michael Dennis Mack, Timothy Scott McMurray, Xiaoqing Zhen
  • Patent number: 9267603
    Abstract: The system and method for preventing air leakage from the process side to the bearing side of a mill. The system includes a labyrinth seal ring comprising a series of knives defining first and second labyrinth paths from an air inlet to the process side and the bearing side of the system, respectively. The differences in the two paths such as provided by the number of knives used in each path creates a differential pressure drop which biases air from the air inlet to the process side. The labyrinth seal thus provides a reliable and superior method for reducing the potential for particulate in the process side of the mill from damaging the bearing system.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: February 23, 2016
    Assignee: UCC Dry Sorbent Injection, LLC
    Inventors: Dennis Engelmann, Robert LeDain, Sean Merlo
  • Publication number: 20150132126
    Abstract: An adjustable seal and method for varying a radial distance between the adjustable seal and a rotor of a turbomachine are provided. The adjustable seal may include a first annular member defining a plurality of radial channels, and a second annular member defining a plurality of slots at least partially extending therethrough. The second annular member may be concentric with the first annular member and configured to rotate relative to the first annular member. The adjustable seal may also include a plurality of seal segments interposed between the first annular member and the second annular member. Each seal segment of the plurality of seal segments may be slidably disposed in a respective radial channel of the plurality of radial channels and may have an axial projection slidably disposed in a respective slot of the plurality of slots.
    Type: Application
    Filed: September 16, 2014
    Publication date: May 14, 2015
    Applicant: DRESSER-RAND COMPANY
    Inventors: James M. Sorokes, Igor M. Belousov, Chris M. Leasure, Austin Kimes, Tyler Johnson
  • Publication number: 20150069712
    Abstract: The disclosure describes a windback device for a circumferential seal within a turbine engine. The windback device includes an annular collar at one end of an annular fluid seal housing, at least one inclined thread, and a plurality of inclined baffles separately disposed along an outer circumferential surface of a rotatable runner. The housing is adapted at another end for an annular seal. The collar has an opening therethrough sized to receive the runner without contact. The annular seal surrounds and sealingly engages the runner. The threads extend from an inner face of the collar toward the runner. The baffles are separately recessed in or raised above the outer circumferential surface of the runner. The baffles are interposed between the runner and threads. Each baffle is separated from the threads via a radial clearance. Threads and baffles direct lubricant away from the annular seal.
    Type: Application
    Filed: November 18, 2014
    Publication date: March 12, 2015
    Inventor: Glenn M. Garrison
  • Publication number: 20150071771
    Abstract: An inter-stage seal for a turbomachine includes a sealing member extending from a first end to a second end through an intermediate portion having a sealing surface, a first mounting member extending from a first end portion coupled to the sealing member adjacent the first end to a second, cantilevered end portion having a first rotor mounting element, and a second mounting member extending from a first end portion coupled to the sealing member adjacent the second end to a second, cantilevered end portion having a second rotor mounting element.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 12, 2015
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Thomas Joseph Farineau, Revanth Krishna Nallam
  • Publication number: 20140356145
    Abstract: Embodiments of the present disclosure are directed towards a seal assembly including a first seal and a second seal, wherein the first seal and the second seal axially abut one another within a retaining bore of a compressor, and cooperatively form an outer radial contour of the seal assembly that is retained by the retaining bore.
    Type: Application
    Filed: May 30, 2013
    Publication date: December 4, 2014
    Inventors: Thomas Edward Gerber, Jonathan David Clemons
  • Publication number: 20140225325
    Abstract: A sealing system for process gas leakage from a turbomachine casing is provided. The sealing system may include a seal assembly housing coupled to or integral with the turbomachine casing. The seal assembly housing defines a bore configured to receive a rotary shaft and a sealing assembly. The sealing assembly includes a plurality of carbon rings mounted circumferentially about the rotary shaft. The plurality of carbon rings may include an inboard carbon ring configured to prevent flow of a separation gas inboard of the barrier seal, an outboard carbon ring configured to prevent flow of contaminates into the seal assembly housing, and an intermediate carbon ring interposed between the inboard carbon ring and outboard carbon ring. A pressure differential is maintained across the inboard carbon ring, such that the separation gas is prevented from flowing inboard across the inboard carbon ring by a residual portion of a seal gas.
    Type: Application
    Filed: February 4, 2014
    Publication date: August 14, 2014
    Applicant: DRESSER-RAND COMPANY
    Inventors: Patrice Bardon, Raphael Bridon, Wee Sen Ng, William Runyan
  • Patent number: 8794632
    Abstract: A leaf seal assembly (20) for providing a seal between a first member and a second member (10), the leaf seal assembly comprising a plurality of leaf elements (22) and a first substantially planar cover plate (24a), the leaf elements being arranged in a pack, with a first edge of each leaf element being adjacent to the first cover plate, wherein each leaf element comprises a first shoulder (30a) in the first edge, the first shoulder being arranged so as to form a first gap (28a) between the first edge of each leaf element and the first cover plate over a portion of the first edge.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: August 5, 2014
    Assignee: Rolls-Royce PLC
    Inventor: Ingo H. J. Jahn
  • Publication number: 20140178178
    Abstract: A dry seal apparatus (30) for a machine (10) includes a seal having a stationary portion (40) and a rotating portion (38); a space (44) disposed between the stationary and rotating portions; a biasing member (42) disposed proximate the stationary portion (40) and in contact therewith for applying a force to the stationary portion; and a labyrinth (37) proximate the rotating portion (38) and constructed and arranged for receiving a liquid for being vaporized before entering the space between the stationary and rotating portions of the seal. A related method is also provided.
    Type: Application
    Filed: December 16, 2013
    Publication date: June 26, 2014
    Inventors: Sebastien BESSON, Bruno Brethes
  • Publication number: 20140169954
    Abstract: A centrifugal turbomachine comprising a casing, a rotor assembly comprising at least one centrifugal impeller for a fluid flowing from an inlet side to an outlet side of the impeller, and an eye seal extending between an impeller eye of the centrifugal impeller and the casing for preventing the fluid from leaking between the casing and the centrifugal impeller, wherein the eye seal comprises at least a first portion toward the inlet side and a last portion toward the outlet side of the impeller, the last portion being smaller in diameter than the first portion.
    Type: Application
    Filed: July 20, 2012
    Publication date: June 19, 2014
    Inventors: Giuseppe Iurisci, Riccardo Brogelli
  • Patent number: 8753099
    Abstract: According to one embodiment of the invention, a gerotor apparatus includes a first gerotor, a second gerotor, and a synchronizing system operable to synchronize a rotation of the first gerotor with a rotation of the second gerotor. The synchronizing system includes a earn plate coupled to the first gerotor, wherein the cam plate includes a plurality of cams, and an alignment plate coupled to the second gerotor. The alignment plate includes at least one alignment member, wherein the plurality of cams and the at least one alignment member interact to synchronize a rotation of the first gerotor with a rotation of the second gerotor.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: June 17, 2014
    Assignees: The Texas A&M University System, Starrotor Corporation
    Inventors: Mark T. Holtzapple, George A. Rabroker, Michael K. Ross
  • Publication number: 20140062024
    Abstract: A seal assembly for a rotary machine is provided. The seal assembly includes multiple sealing device segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of the segments includes a shoe plate with a forward-shoe section and an aft-shoe section having one or more labyrinth teeth therebetween facing the rotor. The sealing device includes a stator interface element having a groove or slot for allowing disposal of a spline seal for preventing segment leakages. The sealing device segment also includes multiple bellow springs or flexures connected to the shoe plate and to the stator interface element. Further, the sealing device segments include a secondary seal integrated with the stator interface element at one end and positioned about the multiple bellow springs or flexures and the shoe plate at the other end.
    Type: Application
    Filed: July 31, 2012
    Publication date: March 6, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Rahul Anil Bidkar, Neelesh Nandkumar Sarawate, Christopher Edward Wolfe, Eric John Ruggiero, Vivek Raja Raj Mohan
  • Patent number: 8650753
    Abstract: A seal (48) between a compressor rotor blade (26) and compressor casing (28) comprises an abradable structure (59) on the compressor casing (28). The abradable structure (59) comprises a metallic foam (60) having pores (66, 68). The metallic foam (60) has a first a region (62) and a second region (64). The first region (62) of the metallic foam (60) is arranged adjacent to the compressor casing (28) and the second region (64) of the metallic foam (60) is spaced from the compressor casing (28) by the first region (62) of the metallic foam (60). The pores (68) of the second region (64) of the metallic foam (60) contain an abradable material (70) and the pores (66) of the first region (62) of the metallic foam (60) do not contain an abradable material.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: February 18, 2014
    Assignee: Rolls-Royce, PLC
    Inventors: Christopher Sellars, Glen Pattinson, John T Gent
  • Publication number: 20140008871
    Abstract: An aerodynamic seal assembly for a rotary machine is provided. The assembly includes multiple sealing device segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of the segments includes a shoe plate with a forward-shoe section and an aft-shoe section having multiple labyrinth teeth therebetween facing the rotor. The shoe plate is configured to allow a high pressure fluid to a front portion of the plurality of the labyrinth teeth and a low pressure fluid behind the plurality of the labyrinth teeth and further configured to generate an aerodynamic force between the shoe plate and the rotor. The sealing device segment also includes multiple bellow springs or flexures connected to the shoe plate and to a top interface element, wherein the multiple bellow springs or flexures are configured to allow the high pressure fluid to occupy a forward cavity and the low pressure fluid to occupy an aft cavity.
    Type: Application
    Filed: July 6, 2012
    Publication date: January 9, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Rahul Anil Bidkar, Massimiliano Cirri, Azam Mihir Thatte, John Robert Williams
  • Patent number: 8556606
    Abstract: A screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft located on the high pressure side, and in this order from the rotor chamber side. It includes a pressurized communicating channel for introducing high-pressure target gas into a pressurized space formed between the first and second non-contact seals, a pressurized pressure detecting device for detecting the pressure of the pressurized space, and an alarm device for generating an alarm when a value detected by the pressurized pressure detecting device falls out of a predefined range of pressurized pressures. The screw fluid machine is capable of detecting or predicting a condition of the shaft sealing device and accurately and reliably reporting the detected condition to an operator.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: October 15, 2013
    Assignee: Kobe Steel, Ltd.
    Inventor: Toru Noguchi
  • Patent number: 8529234
    Abstract: A water-lubrication type screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft. The bearing is located on the high pressure side and in this order from the rotor chamber side. the bearing includes a low pressure communicating channel for allowing an outflow space formed on the rotor chamber side with respect to the first non-contact seal to communicate with a low pressure channel for the target gas communicating with a low pressure space inside the rotor chamber or the rotor chamber, a pressurized communicating channel for introducing high-pressure target gas into a pressurized space formed between the first and second non-contact seals, and an open communicating channel through which an open space formed between the second non-contact seal and the lip seal opens to the outside of the casing.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: September 10, 2013
    Assignee: Kobe Steel, Ltd.
    Inventors: Shoji Yoshimura, Toru Noguchi
  • Publication number: 20130140774
    Abstract: A non-contacting shaft seal apparatus according to which an alternating array of axially-spaced, porous and non-porous annular segments extend radially-inward from the inside surface of an annular seal body and to a radial clearance defined between the segments and a rotating shaft.
    Type: Application
    Filed: January 12, 2011
    Publication date: June 6, 2013
    Applicant: DRESSER-RAND COMPANY
    Inventors: Gocha Chochua, William C. Maier
  • Publication number: 20130058766
    Abstract: Certain embodiments of the invention may include systems, methods and apparatus for providing a labyrinth seal. In an example embodiment, a method is provided for sealing a flow path between a stationary element and a rotating element of a turbomachine. The method can include disposing at least one fixture on an inner surface of a stationary element associated with the turbomachine; disposing a packing ring linked via a spring element to the fixture wherein the packing ring comprises at least one bore; and disposing, according to a predetermined profile, a plurality of interdigitated packing ring teeth and rotor teeth intermediate to the packing ring and the rotating element; wherein the bore, packing ring teeth, and rotor teeth, cooperate to counter a moment associated with one or more axial forces.
    Type: Application
    Filed: September 6, 2011
    Publication date: March 7, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Xiaoqing Zheng, Hrishikesh Deo, Binayak Roy
  • Patent number: 8348650
    Abstract: A housing of a Roots pump is configured by joining a lower housing member and an upper housing member that are separable from each other. With the upper and lower housing members joined together, an upper accommodating portion and a lower accommodating portion form a front bearing accommodating portion and a rear bearing accommodating portion, which accommodate whole bearings, respectively. The Roots pump further includes bearing holders attached to the bearings and fixed to the lower housing member so that the bearings are received in the lower accommodating portion in a positioned state.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: January 8, 2013
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Masahiro Inagaki, Shinya Yamamoto, Makoto Yoshikawa, Yuya Izawa
  • Patent number: 8226384
    Abstract: A labyrinth seal for a bypass discharge-type motor-fan unit includes a motor unit from which extends a rotating shaft that passes through an aperture in an end plate to drive a fan unit. Disposed within the aperture is a labyrinth seal configured to prevent liquid entrained in a working airflow from entering the motor unit. The rotating shaft also includes a vacuum bore, such that the negative pressure generated by the operation of the fan unit draws any liquid out of an evacuation zone maintained between the motor unit and the end plate. As such, the components of the motor unit are protected from being exposed to the liquid, thereby extending the operating life motor-fan unit.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: July 24, 2012
    Assignee: Ametek, Inc.
    Inventors: David B. Finkenbinder, Robert A. Ciccarelli
  • Publication number: 20120162628
    Abstract: An actuator comprising a first part and a second part, the first part being configured to move relative to the second part, wherein a labyrinth seal is provided between the first part and the second part, the labyrinth seal being configured to restrict the flow of gas from a first side of the labyrinth seal to a second side of the labyrinth seal, wherein one or more inlets and one or more outlets are provided within the labyrinth seal, the one or more inlets being configured to provide gas to a location within the labyrinth seal and the one or more outlets being configured to remove at least part of the gas from a location within the labyrinth seal.
    Type: Application
    Filed: June 24, 2011
    Publication date: June 28, 2012
    Applicant: ASML Netherlands B.V.
    Inventors: Fredrik Wilhelm Van Der Blij, Edwin Johan Buis, Pieter Renaat Maria Hennus, Johannes Charles Adrianus Van Den Berg, Johannes Andreas Henricus Maria Jacobs
  • Patent number: 8205889
    Abstract: A method for assembling a rotary machine is provided. The method includes providing at least one seal assembly that includes at least one annular seal housing defined by a top wall, a front wall, and a rear wall, that are connected together such that a cavity is defined within the housing, coupling a plurality of flexible plates within the cavity such that the plates are axially-spaced from the front wall and the rear wall within the cavity, coupling at least one side plate to the at least one annular seal housing such that the at least one side plate is moveable with respect the front wall and the rear wall, and coupling the at least one sealing assembly within a rotary machine to facilitate sealing between a rotary component and a stator component.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: June 26, 2012
    Assignee: General Electric Company
    Inventors: Nikhil Kumar Verma, Jason Paul Mortzheim, Yogesh Sathe, Hrishikesh Vishvas Deo
  • Publication number: 20120112415
    Abstract: A seal assembly includes a first component, a second component that defines an outer surface and is located radially inward from the first component, a groove defined in the second component and arranged to face the first component, and a seal ring positioned between the first and second components and extending at least partially into the groove. The seal ring defines an outer diameter surface and a first lateral surface adjoining the outer diameter surface. The seal ring is split to define a first free end and a second free end, and the first and second free ends are configured to overlap along a split surface that extends from the first lateral surface to the outer diameter surface.
    Type: Application
    Filed: November 10, 2010
    Publication date: May 10, 2012
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Daniel Benjamin, David S. Jang
  • Patent number: 8133003
    Abstract: Disclosed is a seal for a turbomachine including at least one fixed component located proximate to a rotating component of the turbomachine defining a clearance therebetween. At least one magnet is located at the at least one fixed component. The at least one magnet is, when activated, capable of moving the at least one fixed component thereby adjusting the clearance between the fixed component and the rotating component. Further disclosed is a turbomachine utilizing the seal and a method for adjusting a position of at least one fixed component of a turbomachine.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: March 13, 2012
    Assignee: General Electric Company
    Inventors: Michael Alan Davi, David Andrew Stasenko
  • Publication number: 20120049461
    Abstract: A seal assembly for a turbomachine includes a plurality of compliant plate members attached to an interior surface of a stationary housing. The compliant plate members define a sealing ring between the stationary housing and a rotor. Each of the compliant plate members comprises at least one slot therein. The seal assembly further includes at least one arcuate static ring attached to the interior surface of the stationary housing and extending radially into the at least one slot in the compliant plate members. Each of the at least one static ring extends circumferentially through and between a plurality of the compliant plate members. Finally, the seal assembly includes a vibration damper disposed adjacent to or provided on the plurality of compliant plate members. The vibration damper is configured to dampen vibration of the plurality of compliant plate members.
    Type: Application
    Filed: August 31, 2010
    Publication date: March 1, 2012
    Applicant: General Electric Company
    Inventors: Hrishikesh Vishvas Deo, Norman Arnold Turnquist, Farshad Ghasripoor, William Edward Adis
  • Patent number: 8109009
    Abstract: A rotating drum in an oven is sealed against hot gas and air transfer. An annular outer seal holder has an L shaped cross section. A first end of the holder is connected to the oven. A second end is a radial flange. A backing plate has first and second sections. The first section has an inward extending guide. The second section has an inner diameter larger than an inner diameter of the guide portion. Bolts hold the backing plate and the seal retainer segments assembled on the flange. A cylindrical space between the radially guide portion of the backing plate and the seal retainer segments receives radially outwardly extending holder plates of segmental inner sealing elements. Partially cylindrical plates welded to the holder plates engage a drum wear plate. Leaf springs are connected to the seal retainer segments. Inner edges pressing the cylindrical plates radially inward.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: February 7, 2012
    Inventors: Jerry R. Collette, Warren E. Kelm
  • Publication number: 20110187055
    Abstract: A method for maintaining a seal during shaft misalignment using a shaft seal assembly comprising a first sealing means adjacent said shaft with a defined clearance between said shaft and said sealing means, said shaft moveable axially in relation to said first sealing means; a second sealing means, said first sealing means partially encompassed within second sealing means and in cooperative communication with said second sealing means; a third sealing means, said second sealing means partially encompassed within third sealing means and in cooperative communication with said third sealing means, said third sealing means attached to said housing or vessel and allowing said first sealing means and second sealing means to cooperatively respond to said forces produced by angular misalignment of said shaft during rotation of said shaft while maintaining defined clearance between said shaft and said sealing means.
    Type: Application
    Filed: April 11, 2011
    Publication date: August 4, 2011
    Inventors: David C. Orlowski, Neil F. Hoelhe
  • Publication number: 20110182719
    Abstract: A seal assembly for a turbomachine may include at least one arcuate plate coupled to an interior surface of a stationary housing; a circumferentially-segmented packing ring disposed intermediate to a rotor and the plate; a plurality of arcuate teeth disposed intermediate to the ring and the rotor, wherein a clearance of each tooth decreases progressively going from an upstream side of the turbomachinery to a downstream side; wherein the progressive decrease in the clearances of the teeth creates a passive feedback, such that as a tip clearance decreases, outward radial forces cause the packing ring to move away from the rotor and as the tip clearance increases, inward radial forces cause the packing ring to move toward the rotor; and a biasing member disposed intermediate to the arcuate plate and the ring and coupled to both.
    Type: Application
    Filed: January 22, 2010
    Publication date: July 28, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Hrishikesh Vishvas Deo, Binayak Roy
  • Publication number: 20110163505
    Abstract: An adverse pressure gradient seal mechanism for use with variable speed components. The adverse pressure gradient seal mechanism may include a number of labyrinth teeth positioned on a component and an adverse pressure gradient seal positioned between a pair of the labyrinth teeth. The adverse pressure gradient seal may include a number of strips with each of the strips having an angled end.
    Type: Application
    Filed: January 5, 2010
    Publication date: July 7, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Anantha Padmanabhan Bhagavatheeswaran, Ravi Shankar Venkata Kasibhotla, Rohit Pruthi
  • Publication number: 20100288474
    Abstract: A method and systems for a purged seal for an annular space are provided. The purged seal includes a first baffle element that extends from an inner surface of the annular space into the annular space at an oblique angle and a second baffle element that extends from an outer surface of the annular space above the first baffle element in a direction opposite gravity flow into the annular space wherein the second baffle element extends at an oblique angle. The system also includes a third baffle element that extends from the inner surface above the first baffle element in a direction of gravity flow into the annular space wherein the third baffle element extends into the annular space at an oblique angle with respect to the inner surface and wherein a distal end of the third baffle element is positioned proximate a distal end of the second baffle element.
    Type: Application
    Filed: May 12, 2009
    Publication date: November 18, 2010
    Inventors: Constantin Dinu, James Michael Storey, Aaron John Avagliano, Douglas S. Byrd, Shaoping Shi, Judeth Brannon Corry, Allyson Joy Jimenez Huyke
  • Patent number: 7815193
    Abstract: The invention relates to a dry-running piston rod sealing arrangement (1) for sealing a piston rod (2) mounted in a longitudinally displaceable manner. The sealing arrangement comprises at least one sealing ring (5) having a sealing surface (5a), an actuator (7), a sensor (8), and a chamber ring (3) containing the sealing ring (5). The actuator (7) comprises an active connection in relation to the sealing ring (5), such that the sealing surface (5a) can be radially displaced in relation to the piston rod (2). The actuator (7) can be controlled according to a measuring value detected by the sensor (8).
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: October 19, 2010
    Assignee: Burckhardt Compression AG
    Inventors: Norbert Feistel, Georg Samland
  • Publication number: 20100254811
    Abstract: A sealing assembly configured to seal a rotating shaft of a turbo machine having a high pressure process gas, comprising a housing defining a bore configured to receive the rotating shaft and sealing assembly, wherein the housing is mounted to a casing of the turbo machine; a first sealing stage comprising a single dry gas seal and configured to blow down the high pressure process gas to a lower pressure; a labyrinth seal mounted longitudinally outward from the first sealing stage; and a second sealing stage mounted longitudinally outward from the labyrinth seal, wherein the second sealing stage comprises a tandem dry gas seal having a primary dry gas seal and a secondary dry gas seal axially spaced with an intermediate labyrinth seal.
    Type: Application
    Filed: April 6, 2009
    Publication date: October 7, 2010
    Applicant: Dresser-Rand Co.
    Inventors: Mark Joseph Kuzdzal, Harry Francis Miller, Glenn R. Grosso, Martin D. Maier, David J. Peer
  • Patent number: 7775527
    Abstract: A shaft sealing arrangement for a pump for delivering hot fluids includes a dynamic shaft seal (4), in particular a slide ring seal, in order to seal a rotatable shaft (2) relative to a housing (1), and a cooling ring (5) which is mounted in front of the dynamic shaft seal (4) in the direction of the pump interior and which surrounds the shaft (2) at a small spacing. The shaft sealing arrangement further includes an additional seal (8) which seals the shaft (2) in the region of the cooling ring (5) in order to reduce the feed of hot fluid into the gap between the shaft (2) and the cooling ring (5), with the additional seal (8) being formed as a brush seal.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: August 17, 2010
    Assignee: Sulzer Pumpen AG
    Inventor: Paul Meuter
  • Patent number: 7744092
    Abstract: A method and seal assembly for sealing a rotary machine including a rotary component and a stationary component is provided. The method includes providing a plurality of flexible leaf plates in an opening defined between a pair of spaced walls that include an adjustable front wall and an adjustable back wall that is opposed to the front wall. The method also includes adjusting a width of the opening by axially adjusting at least one of the front and back walls with respect to a central rotational axis of the rotary component.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: June 29, 2010
    Assignee: General Electric Company
    Inventor: Jason Paul Mortzheim
  • Publication number: 20100158674
    Abstract: A steam turbine comprises a steam turbine casing, a rotor, and at least one compliant plate seal assembly situated between the casing and the rotor. The compliant plate seal assembly comprises a supporting member being stationary with respect to the casing, a plurality of plate members movably mounted to the supporting member and extending towards the rotor, each plate member being inclined with respect to a rotation direction of the rotor, and an actuator for selectively exerting a pressure to retract the plate members in a direction away from the rotor.
    Type: Application
    Filed: December 22, 2008
    Publication date: June 24, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Norman Arnold Turnquist, Bernard Arthur Couture, JR., Mark William Kowalczyk, Frederick George Baily, Mark Edward Burnett
  • Publication number: 20100143102
    Abstract: A self-correcting seal assembly comprises a plurality of compliant plates coupled circumferentially to a stationary component, at least one slot in the compliant plates extending from the stationary component towards a rotor; and a resistance member coupled to a stationary component. The resistance member comprising at least one annular ring extending from the stationary component towards a rotor and through the slot. The seal assembly is configured to create passive feedback on hydrostatic forces in response to a tip-clearance between the rotor and tips of the compliant plates.
    Type: Application
    Filed: February 15, 2010
    Publication date: June 10, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Hrishikesh Vishvas Deo, Norman Arnold Turnquist, Barbaros Yildirim
  • Publication number: 20100078893
    Abstract: An active retractable seal assembly is configured for use between a rotating component and a stationary component of turbo machinery is disclosed. The seal assembly includes a seal mounted to the stationary component. The seal is movable towards and away from the rotating component between a respective closed position and an open position as a function of pressure drop across the seal. The seal includes an active seal segment, a non-active seal segment, and a fluid by-pass circuit. The fluid by-pass circuit is configured for directing fluid around the active seal segment to reduce pressure drop across the active seal segment thereby resulting in the active seal segment moving towards an open position under the action of one or more biasing devices while maintaining the non-active seal segment in a closed position.
    Type: Application
    Filed: September 30, 2008
    Publication date: April 1, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Norman Arnold Turnquist, Shorya Awtar
  • Publication number: 20100013164
    Abstract: Gas seals are embodied in the form of contactless joints for sealing a gas processing chamber with respect to a sealed chamber, wherein a gas leak is generally extremely low. A locking labyrinth comprising at least one chamber to which the gas is supplied and which is placed upstream of the gas seal makes it possible to avoid said situation. The chamber is provided with a rate control element for operating with a constant supply pressure and for supplying the chamber with a predetermined rate gas flow.
    Type: Application
    Filed: April 10, 2006
    Publication date: January 21, 2010
    Inventor: Franz-Josef Meyer
  • Patent number: 7641200
    Abstract: Disclosed is a variable clearance packing ring arrangement including a packing ring, wherein the packing ring includes a sealing face. The variable clearance packing ring arrangement also includes an actuating arrangement internal to the packing ring.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: January 5, 2010
    Assignee: General Electric Company
    Inventor: Richard Jon Chevrette
  • Publication number: 20090302543
    Abstract: A hydrogen-cooled generator includes a sealing device disposed between a rotor and a stator. The sealing device is configured for at least partially segregating hydrogen atmosphere on one side of the sealing device and a cavity on an opposite side of the sealing device. The sealing device includes a non-contacting seal and a contacting seal including an aluminum body coupled to the non-contacting seal and a plurality of non-metallic bristles projecting from the aluminum body with tips of the bristles engaging the rotor of the generator.
    Type: Application
    Filed: June 9, 2008
    Publication date: December 10, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Eric John Ruggiero, Nitin Bhate, Daniel James Fitzmorris, Anthony James George
  • Patent number: 7578509
    Abstract: A seal assembly which, among other applications, may be used for sealing fluid leakage between a steam or combustion (gas) turbine rotor and a turbine stator body. The seal assembly includes elements having a plurality of spaced leaf seal members with slots therebetween. Each leaf seal member is angled out-of-plane between a fixed end and a free end thereof, and the free ends slidably engage the rotatable component. In one embodiment, the fixed ends of each leaf seal member are positioned substantially perpendicular to a longitudinal axis of the rotating component. A support may be provided supporting the free end such that it contacts a distal end of the support in an operative state and is out of contact with the distal end in an inoperative state. Seal members may include two different materials having different coefficients of thermal expansion.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: August 25, 2009
    Assignee: CMG Tech, LLC
    Inventor: Clayton M. Grondahl
  • Publication number: 20080265514
    Abstract: A method and seal assembly for sealing a rotary machine including a rotary component and a stationary component is provided. The method includes providing a plurality of flexible leaf plates in an opening defined between a pair of spaced walls that include an adjustable front wall and an adjustable back wall that is opposed to the front wall. The method also includes adjusting a width of the opening by axially adjusting at least one of the front and back walls with respect to a central rotational axis of the rotary component.
    Type: Application
    Filed: April 30, 2007
    Publication date: October 30, 2008
    Inventor: Jason Paul Mortzheim