Resilient, Flexible, Or Resiliently Biased Patents (Class 415/174.2)
  • Patent number: 6918739
    Abstract: A turbine engine has a rotor shaft rotatably carried within a non-rotating support structure. A seal is carried by the support structure circumscribing the shaft and having a flexible sealing element for sealing with the shaft. A chamber is located between the seal and support structure. A fluid is carried within the chamber and damps radial excursion of a seal axis from a support structure axis. The seal may be a full annulus or may be segmented. The fluid may be contained within one or more elastomeric bladders.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: July 19, 2005
    Assignee: United Technologies Corporation
    Inventor: Mark E. Addis
  • Patent number: 6910858
    Abstract: A turbine engine has a rotor shaft rotatably carried within a support structure. A seal is carried by the support structure circumscribing the shaft and having a brushpack for sealing with the shaft. A first plate on a first side of the brushpack has a first radial clearance from the rotor shaft. A rubplate has a radial clearance from the rotor shaft that is less than the first radial clearance when the seal and rotor are coaxial.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: June 28, 2005
    Assignee: United Technologies Corporation
    Inventor: Mark E. Addis
  • Patent number: 6910853
    Abstract: A structure for attaching together or sealing a space between a first component and a second component that have different rates or amounts of dimensional change upon being exposed to temperatures other than ambient temperature. The structure comprises a first attachment structure associated with the first component that slidably engages a second attachment structure associated with the second component, thereby allowing for an independent floating movement of the second component relative to the first component. The structure can comprise split rings, laminar rings, or multiple split rings.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: June 28, 2005
    Assignee: General Electric Company
    Inventors: Gregory Scot Corman, Anthony John Dean, Leonardo Tognarelli, Mario Pecchioli
  • Patent number: 6910857
    Abstract: A seal apparatus provides the seal between inner and outer elements. The seal apparatus has a flexible sealing element for forming a seal with a first of the inner and outer elements. At least one support element is secured to the sealing element. The seal further includes means for magnetically interacting with the first element to bias the seal relative to the first element.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: June 28, 2005
    Assignee: United Technologies Corporation
    Inventor: Mark E. Addis
  • Patent number: 6896481
    Abstract: A water pump includes a first enclosure having a center portion that is moveable from a normal condition to a deflected condition and a second enclosure adjacent to the first to form an internal cavity. An impeller is disposed within the internal cavity. A tubular shaft portion extends from the impeller through a bore in the second enclosure. The tubular shaft portion is press fit to a motor shaft which rotates the impeller within the internal cavity. As the motor shaft is inserted into the tubular portion of the impeller, a tool is used to press on and axially deflect the center portion of the first enclosure. Thus, the center portion of the first enclosure contacts the impeller and provides an opposing force on the impeller while the motor shaft is inserted into the tubular portion of the impeller. When the motor shaft is press-fit sufficiently into the tubular portion, the tool is removed.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: May 24, 2005
    Assignee: Freudenberg-NOK General Partnership
    Inventor: John C. Dahlheimer
  • Patent number: 6887038
    Abstract: A method facilitates assembling a gas turbine engine. The method comprises coupling a seal assembly including a brush seal and a plurality of seal bristles to a first rotatable shaft, and positioning the seal assembly such that the seal bristles contact a second rotatable shaft to facilitate sealing between the first and second rotatable shafts during gas turbine engine operation.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: May 3, 2005
    Assignee: General Electric Company
    Inventors: Jerry Lynn Cabe, Osman Saim Dinc
  • Patent number: 6884027
    Abstract: A sealing arrangement for sealing around a turbine or compressor blade includes casing segments having sealing faces for abutting with opposing sealing faces of circumferentially adjacent casing segments along joints between the segments. The sealing faces on adjacent segments are forced into contact with each other by rotation of each casing segment about a mounting pin. To reduce radial leakage, a sealing plate is provided.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: April 26, 2005
    Assignee: Alstom Technology Ltd.
    Inventor: Andrew Rowell Faulkner
  • Patent number: 6866476
    Abstract: An antifriction bearing unit comprises a rotating shaft, an outer ring, and rolling members. The rotating shaft comprises a large-diameter shaft portion serving as an inner ring and a small-diameter shaft portion, which is hollow and has a fitting portion of increased diameter at one end thereof. The large-diameter shaft portion has an end portion fitted and fixed in the fitting portion of the small-diameter shaft portion. The fitting portion has an outward flange integral with an end thereof. The outer ring is fixedly provided with a seal member having lips slidable in contact with the flange and the outer peripheral surface of the large-diameter shaft portion, respectively.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: March 15, 2005
    Assignee: Koyo Seiko Co., Ltd
    Inventors: Yoshizumi Sakata, Michiru Ueda
  • Patent number: 6860719
    Abstract: A method and apparatus for sealing between an inner casing and an outer casing is provided. The method includes positioning a first sealing member in a leakage path defined between an inner casing and an outer casing such that leakage flow in a first direction activates the first sealing member, and positioning a second sealing member in the leakage path such that leakage flow in the first direction bypasses the second sealing member, and such that leakage flow in an opposite second direction activates the second sealing member. The apparatus includes a pair of circumferential grooves in a channel, a divider positioned in the channel that defines a leakage path, a first sealing member positioned to seal against a flow in the leakage path in a first direction, and a second sealing member positioned to seal against a flow in the leakage path in a second direction.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: March 1, 2005
    Assignee: General Electric Company
    Inventor: Steven Sebastian Burdgick
  • Patent number: 6857849
    Abstract: A membrane seal includes a pair of confronting annular sealing grooves. A first annular sealing member is received in one of the oppositely facing sealing grooves and a second annular sealing member is received in the other of the oppositely facing sealing grooves. The first and second sealing members are sealably connected together by an annular membrane. A pressure difference across the membrane forces the first and second sealing members into contact with a side wall of each of the oppositely facing sealing grooves to effect a seal. Known sealing members have a circular cross-section but in the present invention at least one of them has an oval cross-section. The oval cross-section gives the first and/or second sealing member(s) a larger zone of contact with the oppositely facing sealing groove(s). This reduces the amount of wear on the first and/or second sealing member(s) and produces a better seal.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: February 22, 2005
    Assignee: Alston Technology Ltd.
    Inventor: Robert Hirst
  • Patent number: 6832892
    Abstract: A steam turbine includes a rotor supporting a plurality of turbine buckets. The rotor has shaped grooves for receiving a complementary-shaped bucket hook formed on an end of each of the turbine buckets. A rope seal is disposed in each interface between the bucket hooks and the shaped grooves, respectively. The rope seal serves to seal a leakage path that may exist over the bucket hooks between the buckets and respective rotor grooves.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: December 21, 2004
    Assignee: General Electric Company
    Inventors: John Thomas Murphy, Steven Sebastian Burdgick
  • Publication number: 20040247430
    Abstract: A seal assembly and method for a turbomachine having a rotary member and a stationary member circumscribing the rotary member. The seal assembly comprises an annular-shaped platform on the rotary member so as to be disposed at an outer circumferential region thereof. The platform is supported radially outward from the rotary member so as to project beyond axially-adjacent regions of the rotary member. The platform has a contact region radially separated from the rotary member by a cavity. A sealing member is disposed at a radially inward region of the stationary member, with a portion of the sealing member in rubbing contact with the contact region.
    Type: Application
    Filed: June 3, 2003
    Publication date: December 9, 2004
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Bruce William Brisson, Mark Edward Burnett, David Alan Caruso, Robert Edward Deallenbach, James Harvey Vogan, Christopher Edward Wolfe
  • Publication number: 20040237523
    Abstract: A high-pressure ratio turbocharger of this invention has a two-stage compressor section comprising a first-stage compressor impeller rotatably disposed in a first compressor housing, and a second-stage compressor impeller rotatably disposed in a second-stage compressor housing. The first and second stage compressor impellers are attached to a common shaft, and are positioned within respective compressor housing in a direction facing away from one another. A portion of the second-stage compressor housing is formed from a compressor backplate attached to a turbocharger center housing. A scroll seal is disposed between the first and second-stage compressor housings, and is interposed between the impellers to separate outlet air flow between each respective first and second-stage compressor chamber.
    Type: Application
    Filed: July 8, 2004
    Publication date: December 2, 2004
    Inventors: Steven Don Arnold, Gary Vrbas
  • Patent number: 6821086
    Abstract: A seal assembly and method for a turbomachine having a rotary member and a stationary member circumscribing the rotary member. The seal assembly comprises an annular-shaped platform on the rotary member so as to be disposed at an outer circumferential region thereof. The platform is supported radially outward from the rotary member so as to project beyond axially-adjacent regions of the rotary member. The platform has a contact region radially separated from the rotary member by a cavity. A sealing member is disposed at a radially inward region of the stationary member, with a portion of the sealing member in rubbing contact with the contact region.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: November 23, 2004
    Assignee: General Electric Company
    Inventors: Bruce William Brisson, Mark Edward Burnett, David Alan Caruso, Robert Edward Deallenbach, James Harvey Vogan, Christopher Edward Wolfe
  • Publication number: 20040219011
    Abstract: A system and method for achieving clearance control for a high-pressure turbine by means of casing mechanical deflection. An active clearance control system is provided to act on a blade that rotates near a shroud. The shroud is attached to a case at a shroud supporting location, or shroud hanger. A clearance is required between a tip of the blade and the shroud. The blade tip and shroud are surrounded with an elastic case. This case can deflect radially in response not only to thermal expansion, but also to a difference in pressures acting on the inner and outer diameters of the case.
    Type: Application
    Filed: May 2, 2003
    Publication date: November 4, 2004
    Applicant: General Electric Company
    Inventors: Robert J. Albers, Rafael Ruiz, Marcia Boyle
  • Patent number: 6811375
    Abstract: In the diaphragm packing area of a steam turbine, a raised platform affords an annular sealing surface for contact with a brush seal carried by the diaphragm. The platform includes a plurality of platform sealing segments secured to a locking device carried by the rotor. The locking device includes a raised rim having flanges with axially oppositely projecting teeth circumferentially spaced one from the other by slots. The platform segments each include a channel section having flanges with axially inwardly directed teeth. By displacing the platform sealing segments radially inwardly and passing the teeth of the locking device and platform segments through the respective slots, the platform segment teeth lie radially inwardly of the locking device teeth. The platform segments are then rotated radially to align the teeth to secure the sealing surface against radial movement. One segment may be staked, welded or screwed to the locking device to preclude circumferential movement during turbine operation.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: November 2, 2004
    Assignee: General Electric Company
    Inventors: Bruce William Brisson, David Alan Caruso
  • Patent number: 6811374
    Abstract: In the diaphragm packing area of a turbine, a raised platform affords an annular sealing surface for contact with a brush seal carried by the diaphragm. The platform includes a plurality of platform sealing segments secured to a locking device carried by the rotor. The locking device includes a pair of raised rims having flanges with teeth projecting axially toward one another and defining slots therebetween. The platform segments each include underlying flanges with axially oppositely directed teeth. By displacing the platform sealing segments radially inwardly and passing the teeth of the locking device and platform segments through the respective slots, the platform segment teeth lie radially inwardly of the locking device teeth. The platform segments are then rotated radially to align the teeth to secure the sealing surface against radial movement. One segment may be staked, welded or screwed to the locking device to preclude circumferential movement during turbine operation.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: November 2, 2004
    Assignee: General Electric Company
    Inventors: Bruce William Brisson, David Alan Caruso
  • Patent number: 6790001
    Abstract: In a steam turbine high pressure end seal region, brush seals are provided between first and second pressure regions having a pressure drop in excess of the sealing capacity of an individual brush seal. To use brush seals between the first and second regions, one or more intermediate pressure regions are maintained at a substantially fixed predetermined pressure between the first and second pressure regions. Brush seals are interposed between adjacent pressure regions whereby the pressure drop between adjacent pressure regions is within the sealing capacity of the individual brush seal disposed between the adjacent pressure regions.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: September 14, 2004
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Daniel Richard Cornell
  • Patent number: 6786695
    Abstract: To accurately axially position and/or seal between axially facing turbine parts, a groove having a cylindrical cross-section is formed in one surface with a centerline offset toward the one surface, the groove opening through the one surface. Rod segments having corresponding cylindrical cross-sections are inserted in the groove. The rod segments have flat surfaces coextensive therewith projecting a predetermined measured distance from the one surface, thereby accurately axially locating the turbine parts relative to one another and forming a seal therebetween. The rod segments have ends abutting one another to seal the segments one to the other.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: September 7, 2004
    Assignee: General Electric Company
    Inventors: Andrew John Tomko, Brian Patrick Marks
  • Patent number: 6776577
    Abstract: A method of assembling a steam turbine includes positioning a sealing member in a leakage path defined between a first stage nozzle diaphragm and a packing casing, wherein the first stage nozzle diaphragm has a first coefficient of thermal expansion, and the packing casing has a second coefficient of thermal expansion, and coupling the first stage nozzle diaphragm and the packing casing such that the sealing member is fixedly secured between the first stage nozzle diaphragm and the packing casing.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: August 17, 2004
    Assignee: General Electric Company
    Inventors: Kafu Chu, James Patrick Nelligan
  • Publication number: 20040126226
    Abstract: A seal apparatus provides the seal between inner and outer elements. The seal apparatus has a flexible sealing element for forming a seal with a first of the inner and outer elements. At least one support element is secured to the sealing element. The seal further includes means for magnetically interacting with the first element to bias the seal relative to the first element.
    Type: Application
    Filed: December 26, 2002
    Publication date: July 1, 2004
    Inventor: Mark E. Addis
  • Publication number: 20040126227
    Abstract: A turbine engine has a rotor shaft rotatably carried within a support structure. A seal is carried by the support structure circumscribing the shaft and having a brushpack for sealing with the shaft. A first plate on a first side of the brushpack has a first radial clearance from the rotor shaft. A rubplate has a radial clearance from the rotor shaft that is less than the first radial clearance when the seal and rotor are coaxial.
    Type: Application
    Filed: December 26, 2002
    Publication date: July 1, 2004
    Inventor: Mark E. Addis
  • Publication number: 20040115046
    Abstract: A steam turbine includes a stator supporting a plurality of turbine nozzles. The stator has shaped grooves for receiving a complementary-shaped nozzle hook formed on an end of each of the turbine nozzles. A rope seal is disposed in each interface between the nozzle hooks and the shaped grooves, respectively. The rope seal serves to seal a leakage path that may exist over the nozzle hooks between the nozzles and respective stator grooves.
    Type: Application
    Filed: December 11, 2002
    Publication date: June 17, 2004
    Inventors: John Thomas Murphy, Steven Sebastian Burdgick
  • Publication number: 20040101403
    Abstract: In a steam turbine high pressure end seal region, brush seals are provided between first and second pressure regions having a pressure drop in excess of the sealing capacity of an individual brush seal. To use brush seals between the first and second regions, one or more intermediate pressure regions are maintained at a substantially fixed predetermined pressure between the first and second pressure regions. Brush seals are interposed between adjacent pressure regions whereby the pressure drop between adjacent pressure regions is within the sealing capacity of the individual brush seal disposed between the adjacent pressure regions.
    Type: Application
    Filed: November 22, 2002
    Publication date: May 27, 2004
    Inventors: Norman Arnold Turnquist, Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Daniel Richard Cornell
  • Patent number: 6736597
    Abstract: The present invention reduces the amount of gas which leaks and flows from a high pressure side to a low pressure side of the axis and maintains good sealing performance even at high differential pressures. The invention discloses an axis sealing mechanism comprising casings which are supported inside of the stable portion, a plurality of planar plates, which are mutually spaced around the axis, each of which is fixed to the casings, positioned so that an inner end of each planar plate makes an acute angle with a peripheral surface of the axis and contacts the peripheral surface of the axis over a predetermined length in an axial direction, a high pressure side plate which is arranged at a high pressure side and a low pressure side plate which is arranged at a low pressure side so as to hold the planar plates therebetween and a flexible plate which is arranged between the planar plates and the high pressure side plate, and is flexible in an axial direction.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: May 18, 2004
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Kouichi Akagi, Masanori Yuri, Shin Koga, Takashi Nakano, Shin Nishimoto
  • Patent number: 6733233
    Abstract: A shroud assembly for a turbine portion of a gas turbine engine, the shroud assembly comprising an annular ceramic shroud ring, a plurality of arcuate shroud support segments, and a plurality of inwardly biased resilient members. The annular ceramic shroud ring is circumferentially disposed about radially extending blades of a turbine rotor and partially defines an annular hot gas passage of the turbine portion. The plurality of arcuate shroud support segments are radially disposed outwardly of the ceramic shroud ring and are contiguous therewith. The plurality of inwardly biased resilient members are each engaged between one of the shroud support segments and an outer annular turbine support case composed of a material having a different thermal expansion coefficient than the ceramic shroud ring. The resilient members maintain contact between the shroud support segments and the ceramic shroud ring.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: May 11, 2004
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Christophe Jasklowski, Gilles Carrier, Robert Thibeault
  • Publication number: 20040086378
    Abstract: In the diaphragm packing area of a turbine, a raised platform affords an annular sealing surface for contact with a brush seal carried by the diaphragm. The platform includes a plurality of platform sealing segments secured to a locking device carried by the rotor. The locking device includes a pair of raised rims having flanges with teeth projecting axially toward one another and defining slots therebetween. The platform segments each include underlying flanges with axially oppositely directed teeth. By displacing the platform sealing segments radially inwardly and passing the teeth of the locking device and platform segments through the respective slots, the platform segment teeth lie radially inwardly of the locking device teeth. The platform segments are then rotated radially to align the teeth to secure the sealing surface against radial movement. One segment may be staked, welded or screwed to the locking device to preclude circumferential movement during turbine operation.
    Type: Application
    Filed: October 31, 2002
    Publication date: May 6, 2004
    Inventors: Bruce William Brisson, David Alan Caruso
  • Publication number: 20040086381
    Abstract: In the diaphragm packing area of a steam turbine, a raised platform affords an annular sealing surface for contact with a brush seal carried by the diaphragm. The platform includes a plurality of platform sealing segments secured to a locking device carried by the rotor. The locking device includes a raised rim having flanges with axially oppositely projecting teeth circumferentially spaced one from the other by slots. The platform segments each include a channel section having flanges with axially inwardly directed teeth. By displacing the platform sealing segments radially inwardly and passing the teeth of the locking device and platform segments through the respective slots, the platform segment teeth lie radially inwardly of the locking device teeth. The platform segments are then rotated radially to align the teeth to secure the sealing surface against radial movement. One segment may be staked, welded or screwed to the locking device to preclude circumferential movement during turbine operation.
    Type: Application
    Filed: October 31, 2002
    Publication date: May 6, 2004
    Inventors: Bruce William Brisson, David Alan Caruso
  • Patent number: 6722850
    Abstract: Spline seals are disposed in circumferentially registering slots of adjacent arcuate sealing segments disposed in grooves of the casing of a steam turbine about a rotor. The spline seals extend in the gap between the endfaces of the segments and minimize or preclude steam leakage past the endfaces. The spline seals may be oriented axially or inclined radially to minimize leakage paths in the radial inclined and axial directions, respectively. The spline seals are disposed in the slots which may be formed as part of original equipment manufacture or may be machined in segments with the spline seals provided as retrofits.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: April 20, 2004
    Assignee: General Electric Company
    Inventor: Steven Sebastian Burdgick
  • Publication number: 20040033132
    Abstract: A simplified support device (110) for nozzles (112) of a gas turbine stage, of the type in which the support device (110) is interposed in a rotor of the gas turbine, between an upstream blading disc (122) and a downstream blading disc (124) of the nozzles (112), and is provided with honeycomb-type alveolar seals (120); the nozzles (112) of the gas turbine stage comprise an annular body which is divided into nozzle segments (112) and the honeycomb-type alveolar seals (120) are anchored directly to these nozzle segments (112).
    Type: Application
    Filed: June 3, 2003
    Publication date: February 19, 2004
    Applicant: NUOVO PIGNONE HOLDING S.P.A.
    Inventor: Piero Iacopetti
  • Patent number: 6692228
    Abstract: An insert assembly is provided for a rotary machine wherein the rotary machine comprises a rotor and a casing. The rotor comprises a generally longitudinally-extending axis. The casing is generally coaxially aligned with the axis. The casing circumferentially surrounds and is radially spaced apart from the rotor. The insert assembly comprises a channel circumferentially disposed on the rotor and an insert circumferentially disposed in such channel such that the insert assembly is configured to thermally isolate frictional heat from the rotor to the insert.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: February 17, 2004
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Christopher Edward Wolfe, Frederick George Baily, John Francis Nolan, George Ernest Reluzco
  • Patent number: 6685427
    Abstract: A seal is provided for controlling flow of a fluid in a fluid path in a rotary machine. The seal comprises a brush seal carrier having a front plate and a back plate disposed therein. A brush seal is disposed between the front plate and the back plate. In addition, a flexible member is disposed between the brush seal and the back plate for reducing stress in the brush seal.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: February 3, 2004
    Assignee: General Electric Company
    Inventors: Vikas Bhushan Dhar, Norman Arnold Turnquist, Ramesha Guntanur Venkatesh, Lokesh Agrawal
  • Publication number: 20040018085
    Abstract: A seal is provided for controlling flow of a fluid in a fluid path in a rotary machine. The seal comprises a brush seal carrier having a front plate and a back plate disposed therein. A brush seal is disposed between the front plate and the back plate. In addition, a flexible member is disposed between the brush seal and the back plate for reducing stress in the brush seal.
    Type: Application
    Filed: July 23, 2002
    Publication date: January 29, 2004
    Applicant: General Electric Company
    Inventors: Vikas Bhushan Dhar, Norman Arnold Turnquist, Ramesha Guntanur Venkatesh, Lokesh Agrawal
  • Patent number: 6679678
    Abstract: One or more stator seal assemblies are mounted in the housing of a rotating machine such as, for example, an air turbine starter for a gas turbine engine, and surround a rotating shaft. The seal assemblies each include a seal case and a seal. The seal has a face that engages an axial face of a face seal rotor to form a seal. One or more anti-rotation tabs in the seal case engage anti-rotation notches formed in the peripheral surface of the seal. The anti-rotation notches each include substantially arcuate sections formed in notch end surfaces. The arcuate sections increase the amount of wear in the notches that can be tolerated before a potential seal lock-up, thus increasing seal assembly lifetime.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: January 20, 2004
    Assignee: Honeywell International, Inc.
    Inventors: William Giesler, Kellan Geck
  • Patent number: 6669443
    Abstract: In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and a radially outwardly projecting platform between axially adjacent wheels on the rotor. The brush seal is located upstream of the labyrinth seal teeth. The platform has at least one and preferably a pair of flanges or fins projecting in opposite axial directions adjacent radial outer ends of the platform. Non-uniform heat distribution resulting from the frictional contact between the bristles of the brush seal and a sealing surface on the platform along the rotor surface affecting rotor dynamics is thereby eliminated or minimized.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: December 30, 2003
    Assignee: General Electric Company
    Inventors: Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Norman Arnold Turnquist, Bruce William Brisson, David Alan Caruso
  • Patent number: 6666460
    Abstract: A joint sealing key assembly includes a sealing key having a sealing face and one or more posts projecting in a direction away from the sealing face. The sealing key is disposed in a key slot of a first part with the post extending into an opening through the bottom of the key slot. The post includes a laterally opening elongated hole for receiving a lateral pin to retain the sealing key in the slot during assembly. Upon formation of the joint by bringing the seal faces of the first and second parts together, the sealing key is displaced against the bias of a leaf spring thereby retaining the sealing face of the sealing key in sealing engagement with the seal face of the second part.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: December 23, 2003
    Assignee: General Electric Company
    Inventor: Stephen Anthony Diana
  • Patent number: 6648333
    Abstract: In a gas turbine including a nozzle retaining ring having a first annular axially facing sealing surface and a shroud segment having an axial registering second surface. To minimize or prevent leakage flow between the retaining ring and shroud segments, a generally U-shaped seal having reversely folded U-shaped marginal portions is received in a cavity formed in the second surface. At operating conditions, the marginal portions seal against the base of the cavity and the first surface of the retaining ring to prevent leakage flow past the retaining ring/shroud segment interface. To install the seal, the seal body is first compressed and maintained in a compressed state by applying one or more wraps about the seal body and an epoxy is used to secure the seal when compressed in the cavity. At operating temperatures, the retention means releases the seal to engage marginal portions against opposite sealing surfaces of the shroud segments and retaining ring.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: November 18, 2003
    Assignee: General Electric Company
    Inventors: Mahmut Faruk Aksit, Ahmad Safi, Abdul-Azeez Mohammed-Fakir
  • Patent number: 6637751
    Abstract: In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a supplemental seal is disposed between the support ring and inner band of the nozzle segment on a high pressure side of the chordal hinge seal. The supplemental seal includes a pair of sheet metal shims overlaid by a woven metallic cloth supported by a bracket secured to the inner margin of the inner rail. The radially inner end of the cloth seal bears against the annular sealing surface of the nozzle support ring. The shims of the legs of the supplemental seal are slit along their distal margin and staggered circumferentially relative to one another to provide flexibility and effective sealing engagement with the nozzle support ring.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: October 28, 2003
    Assignee: General Electric Company
    Inventors: Mahmut Faruk Aksit, Ahmad Safi, Abdul-Azeez Mohammed-Fakir
  • Patent number: 6622490
    Abstract: An axially loaded floating brush seal useful in a stationary gas turbine engine having a first rotary compressor component having a rotor having a radial surface, a second non-rotary component having an end ending near the radial surface with the floating brush seal being positioned between the first and the second components to substantially reduce the flow of air between the first and second components. A method for controlling the flow of cooling air into a chamber in the second component using the rotary brush seal is also disclosed.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: September 23, 2003
    Assignee: Watson Cogeneration Company
    Inventor: Steve Ingistov
  • Patent number: 6589012
    Abstract: In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and a sealing surface on a rotatable component radially outwardly of the rotor surface. The contact between the brush seal and sealing surface lies along an axially upstream projecting flange of an annular platform such that heat generated by frictional contact between the bristles and the sealing surface has minimal effect on the rotor surface and hence rotor dynamics. A backup labyrinth seal is provided between the web and platform. Additionally, axially upstream projecting flanges are provided on the downstream buckets and which flanges are spaced radially outwardly of the rotor surface and lie in registration with the diaphragm web. Labyrinth teeth seal between the diaphragm web and the bucket flanges serving as a backup seal.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: July 8, 2003
    Assignee: General Electric Company
    Inventors: Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Norman Arnold Turnquist, Bruce William Brisson, David Alan Caruso
  • Publication number: 20030123978
    Abstract: A compliant woven tubular seal is provided in an arcuate cavity opening through an axial face of a plurality of shroud segments in opposition to a nozzle retaining ring. The annular composite tubular woven compliant seal includes a stainless steel inner metal core surrounded by an annular layer of silica fiber. Surrounding the silica fiber is a metal foil which prevents flow past the supplemental seal. An outer wear-resistant braiding serves as a protective covering and wear surface.
    Type: Application
    Filed: December 28, 2001
    Publication date: July 3, 2003
    Inventors: Mahmut Faruk Aksit, Ahmad Safi, Abdul-Azeez Mohammed-Fakir, Srikanth Vedantam, Ning Fang, Gayle Hobbs Goetze, Brian Peter Arness, John Ellington Greene, Wei-Ming Chi
  • Publication number: 20030095865
    Abstract: In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and a radially outwardly projecting platform between axially adjacent wheels on the rotor. The brush seal is located upstream of the labyrinth seal teeth. The platform has at least one and preferably a pair of flanges or fins projecting in opposite axial directions adjacent radial outer ends of the platform. Non-uniform heat distribution resulting from the frictional contact between the bristles of the brush seal and a sealing surface on the platform along the rotor surface affecting rotor dynamics is thereby eliminated or minimized.
    Type: Application
    Filed: November 16, 2001
    Publication date: May 22, 2003
    Inventors: Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Norman Arnold Turnquist, Bruce William Brisson, David Alan Caruso
  • Patent number: 6565316
    Abstract: An adjustable and stable pre-loading device equipped fan includes a stator, a first rigid spacer, a first bearing, an elastic device, a second bearing, a second rigid spacer, a rotor and a shaft. Among these, the stator includes a receptacle. The first bearing is formed on the first rigid spacer in the receptacle. The elastic device is formed in the receptacle and further on the first bearing. The second rigid spacer is formed on the second bearing on the elastic device. The rotor is coupled to the stator and has a blade structure. The first rigid spacer compresses the elastic device by means of the first bearing. The second rigid spacer compresses the elastic device by means of the second bearing. The distance between the first rigid spacer and the second rigid spacer is adjustable, thereby altering pre-loading applied on the first bearing and the second bearing.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: May 20, 2003
    Assignee: Delta Electronics Inc.
    Inventor: Chien-Chung Li
  • Patent number: 6565314
    Abstract: The knife edge air seal ring of a gas turbine is modified to receive a replacement or second seal ring portion having a wire brush seal. The replacement or wire brush air seal ring is mounted with the existing knife edge air seal mounting ring at a location so that the existing mounting ring may be used, while providing adequate strength and structural support for installation of the second, wire brush seal ring. The replacement seal ring may be provided with knife edge seals as well, if desired.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: May 20, 2003
    Assignee: General Electric Company
    Inventors: Keith A. Marler, Matthew C. Lau, Shawn K. Smith
  • Patent number: 6561756
    Abstract: To provide a water pump capable of preventing coolant leaked from a shaft sealing member from invading a bearing by a simple construction, a water pump has an outer ring of a bearing attached to an inner peripheral face of a pulley, an inner ring of the bearing attached to an outer peripheral face of a cylindrical portion of a housing and a shaft sealing member attached to an inner peripheral face of the cylindrical portion.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: May 13, 2003
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Yasuo Ozawa, Atsushi Chiba, Masaki Chujo, Junya Yamamoto
  • Patent number: 6558118
    Abstract: A steam turbine has a rotor mounting axially spaced rotor wheels having male dovetails for mounting a plurality of axially spaced buckets having female dovetails. A plurality of arcuate bridging members extend axially between the axially adjacent bucket dovetails at locations spaced radially outwardly of the surface of the rotor shaft. A diaphragm in radial opposition to the bridging member mounts a brush seal having bristles engaging the bridging member. The bridging member carries backup labyrinth seal teeth for sealing with the diaphragm. The friction generated by contact between the brush seal bristles and bridging members lies radially outwardly of the rotor whereby non-uniform distribution of heat about the rotor surface due to frictional contact with the brush seal is avoided, with consequent avoidance of rotor bowing.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: May 6, 2003
    Assignee: General Electric Company
    Inventors: Bruce William Brisson, Mark Edward Burnett, Frederick George Baily, David Alan Caruso, Norman Arnold Turnquist, Christopher Edward Wolfe
  • Publication number: 20030082049
    Abstract: A steam turbine has a rotor mounting axially spaced rotor wheels having male dovetails for mounting a plurality of axially spaced buckets having female dovetails. A plurality of arcuate bridging members extend axially between the axially adjacent bucket dovetails at locations spaced radially outwardly of the surface of the rotor shaft. A diaphragm in radial opposition to the bridging member mounts a brush seal having bristles engaging the bridging member. The bridging member carries backup labyrinth seal teeth for sealing with the diaphragm. The friction generated by contact between the brush seal bristles and bridging members lies radially outwardly of the rotor whereby non-uniform distribution of heat about the rotor surface due to frictional contact with the brush seal is avoided, with consequent avoidance of rotor bowing.
    Type: Application
    Filed: November 1, 2001
    Publication date: May 1, 2003
    Inventors: Bruce William Brisson, Mark Edward Burnett, Frederick George Baily, David Alan Caruso, Norman Arnold Turnquist, Christopher Edward Wolfe
  • Patent number: 6551058
    Abstract: A rotatory pump has a housing (20) and an impeller wheel (40) which is mounted on a driving shaft (30) to rotate integrally therewith. The driving shaft is rotatably supported in the housing. The driving shaft also has a disk (44) disposed to be concentric with the driving shaft. Radially extending blades (46) are directed along the axial direction of the driving shaft (30) being provided on the disk, and the blades, together with the inner wall portions (22a) of the housing (20) which face the blades (46), form flow channels for the fluid to be pumped. At least one raised portion (48) is on each of the radially extending edges (46a) of preferably three blades (46), to bear against the inner wall portions (22a) of the housing (20) which face the blades (46) of the impeller wheel housing.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: April 22, 2003
    Assignee: Ritz Pumpenfabrik GmbH & Co., KG
    Inventor: Olaf Nowack
  • Patent number: 6547257
    Abstract: A transition piece seal assembly includes a transition piece seal support having a first flange for supporting a transition piece seal, and a second flange adapted for mounting in an adjacent nozzle; and at least one spring seal element having a mounting flange adapted to engage the second flange of the transition piece seal support, and a flex portion having a free edge adapted to engage a forward face of the nozzle.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: April 15, 2003
    Assignee: General Electric Company
    Inventor: Robert Harold Cromer
  • Patent number: 6540483
    Abstract: A bearing assembly for a gas turbine engine rotor includes a damper bearing configured to support the rotor, a bearing centering sub-assembly configured to position the damper bearing relative to the rotor, and a retainer. The damper bearing includes a frame that defines a bearing bore, an inner race, and an outer race, said inner and outer races within said bearing bore. The bearing centering apparatus sub-assembly includes a plurality of first springs and a plurality of second springs. The retainer is coupled to the bearing housing and is configured to maintain an axial position of the bearing outer race with respect to the support structure.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: April 1, 2003
    Assignee: General Electric Company
    Inventors: Barry Lynn Allmon, Morris Green Penn