Close Proximity Seal (e.g., Contactless, Fluent, Etc.) Patents (Class 277/301)
  • Patent number: 9598971
    Abstract: A segmented retractable seal is provided in a stator of a turbine by which a rotor seal is arranged radially and axially movably in a groove formed in the stator of the turbine and is connected with a mechanism which retracts it away from the rotor of the turbine in a radial direction. The groove formed in the stator of the turbine contains an outer partial groove formed on the inner surface of the stator and an inner partial groove formed in the body of the stator and connected with it, its width being smaller than or equal to that of the outer partial groove. A head of the seal is arranged in the inner partial groove, and a comb of the seal is arranged in the outer partial groove. The head of the seal and the comb of the seal are connected by a neck of the seal.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: March 21, 2017
    Assignee: DOOSAN SKODA POWER s.r.o.
    Inventors: Dan Hasnedl, Lubos Prchlik
  • Patent number: 9587505
    Abstract: A seal arrangement between radially-opposed rotating and stationary components in a turbomachine includes a first rotating component, a second stationary component, and a brush seal located radially therebetween. The brush seal has an axially-extending portion secured to the second stationary component, and an inwardly-extending portion extending across a gap between the first and second components. An inner ring portion of the second stationary component is located radially inward of, and in engagement with the axially-extending portion and at least part of the inwardly-extending portion of the brush seal, wherein an end of the axially-extending portion of the brush seal remote from the inwardly-extending portion is sandwiched between a pair of side rails fixed between the inner ring portion and an outer ring portion of the second stationary component.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: March 7, 2017
    Assignee: General Electric Company
    Inventors: Debabrata Mukhopadhyay, Xiaoqing Zheng
  • Patent number: 9194424
    Abstract: A circumferential seal assembly capable of separating a gas into two separate flow paths before communication onto a pair of seal rings is presented. The seal assembly includes an annular seal housing, a pair of annular seal rings, a rotatable runner, and a plurality of groove structures. The seal housing is interposed between a pair of low pressure compartments. The seal rings are separately disposed within the seal housing and separately disposed around the rotatable runner. The groove structures are disposed along an outer circumferential surface of the rotatable runner. The gas is communicable onto the groove structures. Each groove structure bifurcates the gas before communication onto the seal rings. Flow within each groove structure may be further separable before the gas is communicated onto the seal rings. The gas forms a thin-film layer between the rotatable runner and each seal ring.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: November 24, 2015
    Assignee: Stein Seal Company
    Inventor: Glenn M. Garrison
  • Publication number: 20150132116
    Abstract: A hydrodynamic face seal ring for use in a rotary machine includes a support ring having at least two support ring segments and a radially-extending, first face. The support ring is configured to releasably couple to an inner surface of an outer casing of the rotary machine. The face seal ring also includes a sealing ring substantially concentric with the support ring. The sealing ring includes at least two sealing ring segments and a radially-extending, second face. The sealing ring is releasably coupled to the support ring such that the first face is mated against the second face.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 14, 2015
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Roderick Mark Lusted, Azam Mihir Thatte, Christopher David Suttles
  • Publication number: 20150115534
    Abstract: A process is provided for aligning a seal housing assembly with a casing of a gas turbine engine. The casing may comprise a plurality of connecting portions and the seal housing assembly may comprise a plurality of connecting sections. The process may comprise: providing an adjustment tool comprising: a main housing including a first bore and a threaded bore, a first bolt capable of extending through the first bore, and a second bolt capable of threadedly engaging the threaded bore. The process may further comprise mounting the adjustment tool to one of the seal housing assembly connecting sections via the first bolt and adjusting the position of the seal housing assembly relative to the casing by causing the second bolt to move.
    Type: Application
    Filed: October 30, 2013
    Publication date: April 30, 2015
    Inventors: James B. Edwards, Derek A. Bird, Antje Greif, Scott W. Krause
  • Publication number: 20150040567
    Abstract: A turbine assembly is disclosed herein. The turbine assembly may include a rotor with at least one bucket extending radially therefrom. The turbine assembly also may include a stator assembly positioned adjacent to the at least one bucket. Moreover, the turbine assembly may include a seal assembly. The seal assembly may include a first flange extending in a substantially axial direction from the at least one bucket. The seal assembly also may include a second flange extending from the stator assembly in the substantially axial direction opposite the first flange. The second flange may include at least one protuberance projecting towards the first flange.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 12, 2015
    Applicant: General Electric Company
    Inventors: Guoqiang Lu, Xiaoqing Zheng, Jong Youn Pak
  • Publication number: 20140361489
    Abstract: The present application provides an axially retractable seal system positioned within a seal slot of a stationary component and adjacent to a rotating component. The axially retractable seal system may include a seal with an upper flange positioned within the seal slot and one more bristles extending towards the rotating component and a spring positioned axially between the upper flange of seal and the seal slot such that the seal is forced into a retracted position.
    Type: Application
    Filed: June 5, 2013
    Publication date: December 11, 2014
    Inventor: Andrew Paul Giametta
  • Publication number: 20140300057
    Abstract: Fluid transfer seal assemblies for transferring process fluid between a stationary component and a rotating component, fluid transfer systems, and methods for transferring process fluid between the stationary and rotating components via a fluid transfer assembly are provided. A rotatable component includes a sealing surface. The fluid transfer seal assembly comprises a face seal ring having at least one segment of a fluid passageway and a sealing face configured to be disposed opposite of the sealing surface. The sealing face or the opposed sealing surface includes a geometric feature for forming a hydrodynamic seal therebetween. A secondary seal is configured to be disposed between and contacting the face seal ring and the stationary component.
    Type: Application
    Filed: April 5, 2013
    Publication date: October 9, 2014
    Applicant: Honeywell International Inc.
    Inventor: Michael O'Brien
  • Patent number: 8807914
    Abstract: The present invention provides a seal device comprising a sealing passage which allows communication between a first space and a second space, and evacuation lines individually connected to the first space and the sealing passage. A gas feed line for feeding dry gas is connected to the sealing passage.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: August 19, 2014
    Assignee: Ebara Corporation
    Inventor: Hiroyuki Shinozaki
  • Publication number: 20140191475
    Abstract: A seal for a turbomachine is disclosed. The seal assembly includes a rotatable shaft having a stepped outer circumferential surface that defines one or more annular protrusions axially-spaced thereon. A seal is radially-offset dially-offset from the rotatable shaft and has one or more annular recesses that extend radially-outward from the inner circumferential surface of the seal. A plurality of holes are defined in both the inner circumferential surface and the one or more annular recesses of the seal, the one or more annular recesses being axially-spaced from each other and configured to receive the one or more annular protrusions in an interlocking fit.
    Type: Application
    Filed: March 23, 2012
    Publication date: July 10, 2014
    Applicant: DRESSER-RAND COMPANY
    Inventors: Manoj K. Gupta, Steven Nove, Thomas Soulas, Krishnaswamy Ramesh, Glenn Grosso
  • Publication number: 20140093198
    Abstract: A bearing assembly includes an inner member having an outer engagement surface and an outer race. The outer race has an inner surface defining a first end and a second end and an inner engagement surface therebetween, the inner engagement surface is positioned on the outer engagement surface of the inner member. A first annular groove is formed in the inner surface, proximate one of the first end and the second end. A second annular groove is formed in the inner surface and is positioned axially inward from the first annular groove. An external seal is positioned in first annular groove and slidably engages the inner member. An internal seal is positioned in the second annular groove and slidingly engages the inner member.
    Type: Application
    Filed: December 6, 2013
    Publication date: April 3, 2014
    Applicant: ROLLER BEARING COMPANY OF AMERICA, INC.
    Inventor: James Voisine
  • Publication number: 20140035231
    Abstract: A system includes an electrodynamically suspended seal. The electrodynamically suspended seal includes a first element that includes an electrically conducting material and a second element that includes a magnetic material. At least one of the first and second elements is configured to rotate about an axial axis. The first and second elements are disposed adjacent one another. The rotational movement of at least one of the first and second elements creates a levitation force such that the first and second elements are repelled away from one another. The electrodynamically suspended seal also includes a third element configured to create a counteracting force.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 6, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Anurag Singh, Nestor Hernandez Sanchez, James Michael Fogarty
  • Publication number: 20130270775
    Abstract: A shaft sealing system and method are disclosed for a low pressure turbine section having a rotating member including a shaft and a stationary member surrounding the rotating member and defining a steam flow path. The shaft sealing system comprises at least one seal disposed about each of a first end and a second end of the shaft; and a connection line for conducting steam from the first turbine section to a downstream portion of the turbine. The downstream portion of the turbine has a lower pressure than both of the first turbine section and ambient pressure conditions.
    Type: Application
    Filed: April 13, 2012
    Publication date: October 17, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Daniel Robert Coffey, Guoqiang Lu, John Richard Powers, Steven Paul Scarlata, Christopher David Suttles, Xiaoqing Zheng
  • Patent number: 8506246
    Abstract: The static seal (30) includes a rotary seal body (32) comprising an annular base portion (34) which is drivingly mountable on a rotary component such as a shaft and an annular cantilever portion (40) connected at one end to the base portion (34). The seal (30) 5 further includes a rotary seal face (48) and circumferential weights (44) connected to the cantilever portion (40). The seal is configured to dilate under centrifugal force to provide a running clearance between the rotary seal face and a complementary static seal face with which the rotary seal face is in contact when the rotary seal body (28) is stationary. The rotary seal body is further configured so as to facilitate the breaking up of slurry which may set around the seal when the pump (10) of which the seal forms part is inoperative.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: August 13, 2013
    Assignee: Weir Minerals Africa (Proprietary) Limited
    Inventor: Siegfried Geldenhuys
  • Publication number: 20130189085
    Abstract: The present invention relates to a seal arrangement for a turbomachine, in particular a gas turbine, having a plurality of rows, arranged in succession in the axial direction (A), of shells (1-3) connected to one another in the circumferential direction (U), wherein shells adjacent in the axial direction have cross sections opened counter to a throughflow direction (A) and/or a thread axis inclined counter to the throughflow direction.
    Type: Application
    Filed: January 22, 2013
    Publication date: July 25, 2013
    Applicant: MTU Aero Engines GmbH
    Inventor: MTU Aero Engines GmbH
  • Patent number: 8427842
    Abstract: An electromagnetic wave suppression material is fixed to a case of a communication module. The electromagnetic wave suppression material suppresses radiation of electromagnetic waves by coming into contact with a cage that is a module insertion portion of a chassis when the communication module is inserted into the cage. A piezoelectric element is provided on the case, and located between the case and the electromagnetic wave suppression material. When the communication module is inserted into the cage, the controller applies a voltage to the piezoelectric element to stretch it by the applied voltage, thereby increasing contact pressure between the cage and the electromagnetic wave suppression material.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: April 23, 2013
    Assignee: Fujitsu Optical Components Limited
    Inventor: Katsuhiko Hakomori
  • Patent number: 8408554
    Abstract: The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. Each additional groove may contain a pocket. The additional groove(s) directs and creates pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. A bleed hole may also be provided to create a seal between each sealing segment.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: April 2, 2013
    Assignee: Stein Seal Company
    Inventors: Thurai Manik Vasagar, Glenn M. Garrison, Diane R. McNickle
  • Publication number: 20130078091
    Abstract: A seal assembly for a bearing chamber of a gas turbine engine. The seal assembly includes a seal land having a sealing surface and a non-sealing surface, and at least one non-contact seal member having a sealing surface and a non-sealing surface. The opposing sealing surfaces define a fluid flow path for a sealing fluid such as air from a compressor of the gas turbine engine. The seal assembly includes a sealing fluid cooling arrangement comprising an oil jet configured to provide cooling oil to one or both of the seal member and the seal runner non-sealing surfaces.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 28, 2013
    Applicant: ROLLS-ROYCE PLC
    Inventor: Paul D. REES
  • Publication number: 20130022459
    Abstract: A seal assembly for a rotary machine is provided. The seal assembly includes multiple sealing device segments disposed intermediate to a stationary housing and a rotor. Each of the segments includes at least one plate and a sealing element. The seal assembly also includes multiple inter-segment gaps formed between the multiple sealing device segments. Further, for each pair of adjacent sealing device segments, at least one pair of adjacent plates includes one plate overlapping another plate at an inter-segment gap.
    Type: Application
    Filed: July 18, 2011
    Publication date: January 24, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Omprakash Samudrala, Christopher Edward Wolfe, Raymond Edward Chupp
  • Publication number: 20120286476
    Abstract: The present application thus provides a retractable seal system for use between a high pressure side and a low pressure side of a turbine engine. The retractable seal system may include a seal positioned in a slot of a stationary component, a pressure balance pocket positioned about the seal, and a conduit in communication with the pressure balance pocket and the high pressure side.
    Type: Application
    Filed: May 10, 2011
    Publication date: November 15, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Omprakash Samudrala, Siddarth Kumar, Gregory Crum, Karimulla Shaik Sha
  • Publication number: 20120251290
    Abstract: An aspirating face seal includes a primary seal, a secondary seal, and a biasing device. The primary seal includes a first seal component and a second seal component. The first seal component is configured to be coupled to a rotor and rotatable with the rotor. The secondary seal includes a plurality of flexible elements and configured to be disposed between the second seal component and a stator housing. A biasing device is coupled to the second seal component such that the second seal component is biased along an axial direction away from the first seal component during a non-operating condition.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 4, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Norman Arnold Turnquist, Rodrigo Rodriguez Erdmenger, Xiaoqing Zheng, Robbert Christiaan Pannekeet, Keith Michael Parker
  • Publication number: 20120223483
    Abstract: The present application provides an aerodynamic seal assembly for use with a turbo-machine. The aerodynamic seal assembly may include a number of springs, a shoe connected to the springs, and a secondary seal positioned about the springs and the shoe.
    Type: Application
    Filed: March 4, 2011
    Publication date: September 6, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Rahul Anil Bidkar, Christopher Wolfe, Biao Fang
  • Publication number: 20120087806
    Abstract: Methods and mechanisms for fluid sealing are provided. The disclosed mechanisms include a tool having a cavity configured to form a toroidal vortex and a fluid sealing element to induce an azimuthal variation of the toroidal vortex (a “dynamis seal”). The fluid sealing element may include a sharp change in the axial symmetry of the cavity to induce the azimuthal variation. Some exemplary shapes of the fluid sealing element may include a notch in a cavity, a step shaped cavity, or an angular cavity in the tool. Methods for manufacturing such a dynamic seal is also provided as well as methods for producing hydrocarbons with a plunger having the dynamic seals. The tool may be a plunger, a pig, an in-flow control device, or other cylindrical device traveling through a conduit or tubular member.
    Type: Application
    Filed: May 13, 2010
    Publication date: April 12, 2012
    Inventor: Pietro Valsecchi
  • Publication number: 20120076642
    Abstract: A method of assembling a sealing assembly for a turbomachine is provided. The method includes positioning at least one sealing element that includes a substantially tortuous flow path defined therein within at least one channel defined in a rotatable element of the turbomachine. The sealing element is extended circumferentially about the rotatable element such that the sealing element extends into a cavity defined between the rotatable element and a stationary element. This facilitates substantially reducing flow leakage from an upstream region of the cavity to a downstream region of the cavity.
    Type: Application
    Filed: September 23, 2010
    Publication date: March 29, 2012
    Inventors: Ya-Tien Chiu, James Royce Howes
  • Publication number: 20120038113
    Abstract: A seal backup ring is provided with undulating surfaces which create circumferential convergence with a relatively rotatable surface. The backup ring is configured so that differential pressure acting across a rotary seal forces portions of the backup ring against the relatively rotatable surface, closing, or substantially closing, the extrusion gap that the rotary seal is exposed to. In response to relative rotation between the backup ring and the mating relatively rotatable surface, the circumferential convergence promotes hydrodynamic lubrication within the dynamic interface that exists between the backup ring and the relatively rotatable surface. The modulus of elasticity of the backup ring is greater than the modulus of elasticity of the rotary seal.
    Type: Application
    Filed: February 11, 2011
    Publication date: February 16, 2012
    Inventors: Lannie Laroy Dietle, Aaron Richie, Victor Garcia, JR., Jeffrey D. Gobeli, John Erick Schroeder
  • Patent number: 8074995
    Abstract: The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. The additional groove(s) directs and creates pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. A bleed hole may also be provided to create a seal between each sealing segment.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: December 13, 2011
    Assignee: Stein Seal Company
    Inventors: Thurai Manik Vasagar, Alan D. McNickle, Diane R. McNickle, legal representative, Glenn M. Garrison
  • Publication number: 20110210513
    Abstract: A rotary machine comprises a housing, a rotor that is rotatably disposed within the housing and having an axis about which the rotor may spin, and a seal disposed upon the housing. The seal comprises a support disposed on the housing and a plurality of flexible non-metallic bristles that extend from the housing and engage the rotor, such that the seal provides a barrier to fluid flow between a first region located in a first axial direction from the seal and a second region located in an opposite axial direction from the first region. The first region is filled with a bearing liquid and the second region is filled with a process fluid.
    Type: Application
    Filed: February 26, 2010
    Publication date: September 1, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Biao Fang, Christopher Edward Wolfe, Roderick Mark Lusted, Vasanth Srinivasa Kothnur, Eric John Ruggiero, Michael Alan Vallance, Farshad Ghasripoor, Martin Soerensen
  • Publication number: 20110081236
    Abstract: The static seal (30) includes a rotary seal body (32) comprising an annular base portion (34) which is drivingly mountable on a rotary component such as a shaft and an annular cantilever portion (40) connected at one end to the base portion (34). The seal (30) 5 further includes a rotary seal face (48) and circumferential weights (44) connected to the cantilever portion (40). The seal is configured to dilate under centrifugal force to provide a running clearance between the rotary seal face and a complementary static seal face with which the rotary seal face is in contact when the rotary seal body (28) is stationary. The rotary seal body is further configured so as to facilitate the breaking up of slurry which may set around the seal when the pump (10) of which the seal forms part is inoperative.
    Type: Application
    Filed: July 24, 2008
    Publication date: April 7, 2011
    Inventor: Siegfried Geldenhuys
  • Patent number: 7919563
    Abstract: The present invention relates to the process for preparing hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: April 5, 2011
    Assignee: Lanxess Inc.
    Inventors: Frederic Guerin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
  • Patent number: 7772328
    Abstract: The present invention relates to hydrogenated nitrite rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art. The present invention is also related to shaped articles containing hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: August 10, 2010
    Assignee: LANXESS Inc.
    Inventors: Frédéric Guérin, Sharon X. Guo, Zsolt Szentivanyl, Stephan Glander
  • Publication number: 20100171268
    Abstract: A system for providing compliant rotating seals including a rotating portion that has one or more teeth extending radially from it, and a stationary portion that has a plurality of bristles extending radially from it. The one or more teeth rotatively engage the plurality of bristles creating a tortuous path between them that resists a leakage of gas or fluid through them.
    Type: Application
    Filed: January 6, 2009
    Publication date: July 8, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Andrew Ray Kneeland, Eric David Roush
  • Patent number: 7735833
    Abstract: The present invention generally relates to sealing devices used in conjunction with two relatively rotatable members and having a fluid seal there between. Finger seals are utilized to achieve sealing between a rotating member and a stationary member. As such the present invention involves a double padded finger seal with both pads oriented axially in the same direction. The sealing apparatus may optionally utilize a padless third laminate. In other embodiments, the present invention provides variations of the basic double padded finger seal with pad configurations utilizing various arrangements and geometries of the padded area.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: June 15, 2010
    Assignee: The University of Akron
    Inventors: Minel J. Braun, Hazel Marie, Ian Smith
  • Publication number: 20100072706
    Abstract: A rotary machine includes a machine rotor, a machine stator, and a fluid seal disposed between the machine rotor and the machine stator. The fluid seal includes a fluid seal stator, a fluid seal rotor, and an active gap control mechanism coupled to the fluid seal stator. The fluid seal is configured to control a gap between the fluid seal stator and the fluid seal rotor.
    Type: Application
    Filed: December 2, 2009
    Publication date: March 25, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Michael Bernard Schmitz, Roderick Mark Lusted, Mohsen Salehi, Eric John Ruggiero, Leonardo Baldassarre
  • Publication number: 20100066024
    Abstract: A brush seal assembly and method for sealing a turbine machine rotary member relative to a stationary member circumscribing the rotary member. The seal assembly includes a first compliant seal component disposed at a radially inward region of the stationary member in rubbing contact with a surface of the rotary member. The seal assembly also includes at least one hard seal element formed integrally with a carrier of the first compliant seal component, located a specified axial distance from the first compliant seal component.
    Type: Application
    Filed: March 24, 2009
    Publication date: March 18, 2010
    Applicant: General Electric Company
    Inventors: Steven Sebastian BURDGICK, Andrew Greif
  • Publication number: 20090322028
    Abstract: A seal arrangement (1, 101) for maintaining an axial pressure differential between relative high and low pressure stages along a rotating element (2, 102), the arrangement comprising: i) a plurality of leaf or brush seal members (5) forming a circumferential seal-pack (4, 104) around the rotating element (2, 102), in-between said low and high pressure stages, for limiting leakage of fluid between said low and high pressure stages; ii) a baffle (6, 7, 106, 107) positioned on the upstream or downstream side of the seal-pack (4, 104) for regulating such leakage through the seal pack (4, 104); and iii) a control arrangement for adjusting the position of the baffle (6, 7, 106, 107) hereby to control the regulation of said leakage through the seal-pack (4, 104) and hence control the consequent blow-down effect on the seal-pack (4, 104) caused by that leakage.
    Type: Application
    Filed: March 25, 2009
    Publication date: December 31, 2009
    Applicant: ROLLS-ROYCE PLC
    Inventors: Christopher Wright, Simon D. Granville-George
  • 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: 7604239
    Abstract: An assembly for sealing a rotating shaft and a bearing housing which has a stator, a rotor, and a unitizing element. The stator has at least two portions and an annular engagement flange extending in an axial direction having a groove on a radial side thereof. The rotor has at least two portions and an annular engagement flange extending in an axial direction having a groove on the radial side thereof. The annular unitizing element has at least two portions, a stator engaging member that engages the stator groove, a rotor engaging member that engages the rotor groove, and a rear member having a side edge that engages the stator. A radially outer surface of the unitizing element has two areas of differing diameter, one corresponding to the rotor engaging member and the other corresponding to the rear member.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: October 20, 2009
    Assignee: Garlock Scaling Technologies LLC
    Inventors: Elizabeth Chitren, Christopher Tones
  • Publication number: 20090148275
    Abstract: A laminate air seal for a gas turbine engine includes at least one fabric layer made of fiberglass, ceramic fiber, basalt and/or carbon, and a polymeric resin that is stable at an operating temperature of the gas turbine engine. The resin may be preimpregnated into the fabric layers, or introduced into the fabric during assembly and formation of the laminate. The resin may be polyimide, bismaelimide (BMI) or cyanate ester. A particular resin selected may depend, in part, on the operating temperatures in that region of the gas turbine engine. In some embodiments, the laminate seal may include a coating to increase lubricity of the seal. In one embodiment, the laminate air seal is used to seal a gap between a pylon fairing and an exhaust nozzle of the turbine engine.
    Type: Application
    Filed: December 5, 2007
    Publication date: June 11, 2009
    Applicant: United Technologies Corporation
    Inventors: William F. Bogue, Daniel M. Stadtlander, Charles R. Watson
  • Publication number: 20090110545
    Abstract: In one embodiment, a method for controlling seal clearance in a turbine engine includes positioning a seal ring within a turbine engine, the seal ring having an inner annular surface and an outer annular surface, the inner annular surface and the outer annular surface both being circular but non-concentric, rotating the seal ring within the engine until the seal ring is placed in an aligned orientation at which a center of a circle that defines the inner annular surface coincides with a centerline of the engine, and securing the seal ring while in the aligned orientation.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Todd Davis, Jennifer Reid
  • Publication number: 20090039604
    Abstract: A brush seal for sealing off components movable relative to one another with respect to a pressure difference is disclosed. The brush seal having bristles which are arranged in a bristle housing which consists of two housing halves having free ends of legs which project into the area of the ends of the bristles, which legs carry mutually facing supporting surfaces for the bristles.
    Type: Application
    Filed: October 17, 2008
    Publication date: February 12, 2009
    Applicant: MTU Aero Engines GmbH
    Inventors: Stefan Beichl, Carsten Butz, Christoph Cernay
  • Publication number: 20080265512
    Abstract: A hand assisted laparoscopic seal apparatus. The seal apparatus includes a seal body and a housing supporting the seal body. The seal body includes a core composed of a fast recovery foam and a flexible membrane covering the core.
    Type: Application
    Filed: April 27, 2007
    Publication date: October 30, 2008
    Inventors: Andrew T. Beckman, David E. Havens, Kristin Muckley, Matthew C. Everhart
  • Publication number: 20080265513
    Abstract: A seal comprises the combination of a primary seal and a secondary seal each of which acts on at least one shoe that is installed with clearance relative to one of a rotor and a stator in a position to create a non-contact seal therewith. The at least one shoe is provided with a surface geometry and labyrinth-type teeth that influence the inertia of fluid flowing across the seal, and, hence, the velocity of the fluid and the pressure distribution across the seal, ultimately affecting the balance of forces applied to the seal.
    Type: Application
    Filed: June 4, 2008
    Publication date: October 30, 2008
    Inventor: John F. Justak
  • Patent number: 7232286
    Abstract: The present invention provides a seal device comprising a sealing passage which allows communication between a first space and a second space, and evacuation lines individually connected to the first space and the sealing passage. A gas feed line for feeding dry gas is connected to the sealing passage.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: June 19, 2007
    Assignee: Ebara Corporation
    Inventor: Hiroyuki Shinozaki
  • Patent number: 6780939
    Abstract: The present invention relates to hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art. The present invention is also related to shaped articles containing hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: August 24, 2004
    Assignee: Bayer Inc.
    Inventors: Frédéric Guérin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
  • Publication number: 20040080112
    Abstract: The present invention relates generally to a technical domain of a sliding element engaging a relative rotational motion. A primary objective of a sliding element of the present invention is to decrease a friction coefficient of the sliding face and to improve the seal performance. The element disposes dimples on at least one sliding face of a pair of relatively rotating sliding faces wherein the dimples are inclined towards a rotary direction when viewed along a radial direction. The sliding face of the sliding element also disposes a plurality of ring-formed dimple sections which form annuli of distinct diameters wherein the dimples are arranged along the individual annuli. The sliding face also disposes annular dam sections which are located between the individual dimple sections.
    Type: Application
    Filed: September 25, 2003
    Publication date: April 29, 2004
    Applicant: EAGLE INDUSTRY CO., LTD.
    Inventor: Yoshihiro Tejima
  • Patent number: 6679501
    Abstract: A motor or bearing which incorporates the use of a capillary seal adjacent a bearing race between the shaft and surrounding hub or housing. The seal may take a plurality of forms, including a straight capillary seal; a seal formed between the housing and a seal ball having different radius of curvatures (preferably with the housing internal surface having a larger radius); or a centrifugal capillary seal comprising a male cone supported on a fixed or rotating shaft, and a female cone supported on a housing. The use of a capillary seal rather than ferrofluid seal should also provide a reduction in resistance across the seal gap compared to a ferrofluid seal.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: January 20, 2004
    Assignee: Seagate Technology LLC
    Inventors: Robert M. Pelstring, Raquib U. Khan, Klaus Kloeppel, Alan L. Grantz, Norbert S. Parsoneault, Marten F. Byl, Hans Leuthold
  • Patent number: 6659469
    Abstract: An elastomeric valve stem seal component is adapted for installation over a valve guide of an internal combustion engine. The seal component incorporates fabric reinforcement within an annular jacket body of the component. In one preferred form, the fabric is positioned intermediate two elastomeric layers of the seal body; i.e. between an inner layer and an outer layer. One preferred manufacturing method provides extrusion of a tube having a fabric reinforcement layer already provided between inner and outer layers. A cutting die incorporates a push ring adapted to move the component along a staged molding assembly process. A series of threaded core pins are utilized for conveyance of the component in the fabrication process, which includes extruding a rubber tube and cover over a series of threaded core pins, cutting a portion of the rubber tube to a predetermined length, and molding the predetermined length to produce the component.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: December 9, 2003
    Assignee: Dana Corporation
    Inventor: Mark A. Leimer
  • Publication number: 20030201606
    Abstract: The present invention provides a seal device comprising a sealing passage which allows communication between a first space and a second space, and evacuation lines individually connected to the first space and the sealing passage. A gas feed line for feeding dry gas is connected to the sealing passage.
    Type: Application
    Filed: April 2, 2003
    Publication date: October 30, 2003
    Applicant: EBARA CORPORATION
    Inventor: Hiroyuki Shinozaki
  • Patent number: 6527274
    Abstract: A seal assembly for installation between rotating and stationary components of a machine includes a first plurality of leaf spring segments secured to the stationary component in a circumferential array surrounding the rotating component, the leaf spring segments each having a radial mounting portion and a substantially axial sealing portion, the plurality of leaf spring segments shingled in a circumferential direction.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: March 4, 2003
    Assignee: General Electric Company
    Inventors: William Lee Herron, Jeffrey John Butkiewicz
  • Patent number: 6139018
    Abstract: A brush seal includes a plurality of bristles in a circumferential array secured to a fixed component and about a rotary component. The bristles are cantilevered toward the rotary component at an angle to the radii of the rotary component with the bristle tips engaged against the rotary component. The bristles are supported by plates on opposite axial sides of the bristles. The plates have channels for directing fluid under pressure into the channels and against the bristles to deflect or bend the bristles toward the rotary component so that the tips of the bristles bear against the surface of the rotary component, enhancing the seal.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: October 31, 2000
    Assignee: General Electric Co.
    Inventors: Robert Harold Cromer, Norman Arnold Turnquist, Christopher Edward Wolfe, Bharat S. Bagepalli