Brush Seal Patents (Class 277/355)
  • Patent number: 8191898
    Abstract: A brush seal assembly including a pair of annular plates defining an annular slot between them and a radially outer chamber opening into the slot; and an annular brush seal having bristles and an enlarged portion at its outer periphery formed by welding the bristles together, the brush seal extending through the slot with its enlarged portion retained in the chamber wherein at least a portion of one of the plates has an extension thereof which is deformed over the other plate to hold the plates together to form the assembly characterized in that one of the plates has a flat face in the region of the slot.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: June 5, 2012
    Assignee: Cross Manufacturing Company (1938) Limited
    Inventor: Peter Francis Crudgington
  • Publication number: 20120126484
    Abstract: The invention concerns a system for providing a seal between two volumes (V1, V2) delimited by a part (2A) mounted to rotate about an axis (A) and a stator (6), said system (S) including an annular brush seal (7) that comprises: a brush body (8) pivotally mounted in the stator; and fibers (10) fixed to the brush body and inclined at an angle ? relative to a plane (P) orthogonal to the rotation axis (A), wherein it includes means (11, 12) for adjusting the angle ? of the fibers (10) so as to be able to adjust precisely the clearance between the free end (10A) of the fibers and the rotary part (2A).
    Type: Application
    Filed: November 18, 2011
    Publication date: May 24, 2012
    Applicant: SNECMA
    Inventors: Nelson DOS SANTOS, Dominik Igel, Gérard Philippe Gauthier
  • Patent number: 8181965
    Abstract: The present invention relates to replaceable brush seal assemblies for use with turbines such as industrial gas turbines. In accordance with the present invention, a brush seal assembly comprises a flange, a brush seal mounted to the flange, and retainers preventing rotation of the brush seal relative to the flange. A method of repairing a brush seal having a back plate, side plate, and bristles is also disclosed. The method comprises the steps of removing the side plate and the bristles from the back plate, and securing a second brush seal to the back plate.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: May 22, 2012
    Assignee: United Technologies Corporation
    Inventor: Mark E. Addis
  • Publication number: 20120104700
    Abstract: A brush seal is disclosed that may include a spring-ioaded seal arrangement configured to conform to a wide range of sealing diameters along the length of a rotor of a turbomachine. In particular, the brush seal may be manufactured with free ends configured to overlap and provide a finite amount of radially expandable/contractible play and yet maintain an effective seal. Consequently, the same brush seal design may be used in a range of locations along a rotor length without the need to specifically manufacture separate brush seals for each variance in dimension.
    Type: Application
    Filed: June 23, 2010
    Publication date: May 3, 2012
    Applicant: Dresser-Rand Company
    Inventors: David J. Peer, Robert E. Kunselman
  • Patent number: 8167313
    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: Grant
    Filed: March 24, 2009
    Date of Patent: May 1, 2012
    Assignee: General Electric Company
    Inventors: Steven Sebastian Burdgick, Andrew Greif
  • Patent number: 8162323
    Abstract: A leaf seal arrangement is provided in which within a housing there are edge portions to inter associate with non parallel chamfer edges in leaf seal elements. In such circumstances, deflection of the leaf seal elements in an outward direction or inward direction relative to a rotating shaft creates variation in a control gap X, XX between the edges and the chamfer edge. Such increase or decrease in the control gap X, XX adjusts the aerodynamic radial force that is presented to the leaf seal elements whereby those elements can be more accurately maintained at a desired leaf position for optimizing leakage while achieving better wear resistance performance.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: April 24, 2012
    Assignee: Rolls-Royce PLC
    Inventors: Richard Nicholson, Terence Valentine Jones
  • Patent number: 8157266
    Abstract: A seal assembly for a regenerative heat exchanger can include a sealing member with a mounting base and a flexible contact portion having a contact edge that resiliently contacts a sector plate of the heat exchanger housing when the seal assembly is mounted to the heat exchanger. The seal assembly can also include a curvilinear support with a mounting section and a curved extended portion attached to the mounting section and having a predetermined curvature that gradually contacts the flexible contact portion as flexion of the flexible contact portion is increased, thereby gradually moving a flex point of the flexible contact portion toward the contact edge of the curvilinear support and gradually increasing a spring constant of the unsupported end of the flexible contact portion to resist further flexion of the flexible contact portion.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: April 17, 2012
    Assignee: Paragon Airheater Technologies, Inc.
    Inventors: Frank Klisura, Stephan Hastings
  • Publication number: 20120086172
    Abstract: A brush seal and brush seal segment for use in a rotary device are provided. In one embodiment, the invention provides a brush seal comprising: a plurality of brush seal segments, each segment including: an arcuate fence; an arcuate backplate substantially circumferentially coextensive with the arcuate fence, the arcuate backplate including a first end and a second end; and a plurality of brush seal bristles between the arcuate backplate and the arcuate fence, the plurality of brush seal bristles being angled with respect to a radial axis of the arcuate backplate and at least one of the first end and the second end of the arcuate backplate; and a static member to which at least one of the plurality of brush seal segments is affixed.
    Type: Application
    Filed: October 6, 2010
    Publication date: April 12, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Xiaoqing Zheng, William Edward Adis, Bernard Arthur Couture, JR., Michael Dennis Mack
  • Patent number: 8152462
    Abstract: A card seal with an annular arrangement of cards that are positioned within an annular groove of a casing, and a conical flexible seal is secured to the casing on the low pressure side of the cards. The cards and the flexible seal both includes slanted surfaces that interact during operation such that the flexible seal gap decreases with the rotor shaft and the cards are secured within the annular groove during assembly and installation of the card seal. The flexible seal blocks leakage through the cards and includes an axial extending inner end that can include an abradable material to allow for rub with the shaft while decreasing the gap to prevent leakage across the cards.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: April 10, 2012
    Assignee: Florida Turbine Technologies, Inc.
    Inventor: Gregory C Williams
  • Patent number: 8132815
    Abstract: A card seal with an annular arrangement of cards that form the card seal, where the cards each form an L-shape cross section with a wide front face and a narrow side face, where the side face has a constant width from a top end to a location greater than a mid-point, and from this point decreases in width to zero width at the bottom end. The side faces form a blockage against leakage flowing between adjacent cards in a cards seal assembly.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: March 13, 2012
    Assignee: Florida Turbine Technologies, Inc.
    Inventor: Daniel R Dillon
  • Patent number: 8118310
    Abstract: A brush seal including a bristle pack mounted in a holder, and having a free end for sealing with a member, a front plate for lying on a high pressure side of the seal and extending part way along the length of the bristle pack to a free end being spaced from the bristle pack characterized in that the front plate is formed for or carries a formation for reducing the influence of swirling fluid on the high pressure side on the bristle pack.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: February 21, 2012
    Assignee: Cross Manufacturing Company (1938) Limited
    Inventors: Peter Francis Crudgington, Aaron Bowsher
  • Publication number: 20120025472
    Abstract: A labyrinth seal has a plurality of arcuate labyrinth seal segments 14 in which the confronting ends of adjacent arcuate labyrinth seal segments 14 have planar faces 26 which are oriented radially and axially but which are canted away from a strictly axial orientation 28 by a cant angle. A plurality of arcuate brush seal segments 16 may be retained in the plurality of arcuate labyrinth seal segments 14, thereby forming a combined labyrinth and brush seal.
    Type: Application
    Filed: May 19, 2011
    Publication date: February 2, 2012
    Inventors: Wilhelm Reiter, Christos Georgakis, Ivan Ramirez, Venkatesan Palaniappan
  • Publication number: 20120027582
    Abstract: A packing ring assembly for use between a rotating and a stationary component in a turbomachine is disclosed, the assembly including an arcuate packing ring casing, an arcuate packing ring segment positioned at least partially within the packing ring casing, and a resistance component configured to allow movement of the packing ring segment in an axial direction, relative to the rotating component, between a first and second position in response to a pressure condition. In one embodiment, the resistance component allows movement when the pressure condition comprises approximately 30% of the turbomachine load. Also disclosed is an altered surface topography of the rotating component to accommodate variable length teeth extending from the packing ring segment, such that when the packing ring segment is in the first position, a clearance between the packing ring segment and the rotating component is larger than when the packing ring segment is in the second position.
    Type: Application
    Filed: August 2, 2010
    Publication date: February 2, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Rajasekar Natarajan, Rakesh Vamsi Alamsetty, Mahendra Singh Mehra, Nestor Hernandez Sanchez, Manikandan Srinivasan
  • Publication number: 20120017594
    Abstract: A seal assembly (50, 60) for a gas turbine engine for controlling air flow between a diffuser (48) and rotor disks comprising first and second annular flange ends (52, 54) and an annular seal mid-section (56) between and operatively connected to the flange ends (52, 54). The first and second annular flange ends (52, 54) abut respective outer frame members (46) of the diffuser, whereby a fluid flow path is formed between the seal assembly (50, 60) and the rotor disks (42). The first and second end flanges (52, 54) are composed of a material having a coefficient of thermal expansion that is substantially the same as a coefficient of thermal expansion of the material of the outer frame members (46). In addition, the material of the seal mid-section (56) has a coefficient of thermal expansion that is different than that of the materials of the annular flange ends (52, 54) and outer frame members (46).
    Type: Application
    Filed: July 8, 2011
    Publication date: January 26, 2012
    Inventors: Christian Kowalski, Fan Zhang, Uwe Lohse, Robert W. Sunshine, Burkhard Voss
  • Patent number: 8100405
    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: Grant
    Filed: January 6, 2009
    Date of Patent: January 24, 2012
    Assignee: General Electric Company
    Inventors: Andrew Ray Kneeland, Eric David Roush
  • Patent number: 8100406
    Abstract: A gap 6 between a stationary component 2 and a rotating component 4 is sealed by means of a leaf seal comprising an array of leaves 8, 9. The leaves 8, 9 are disposed in pairs, comprising a higher curvature leaf 8 and a lower curvature leaf 9 which contact each other resiliently at their tips 12. The contact at the tips 12 provides a damping effect. As a result, the tips 12 of the leaves 8, 9 are relatively stable when subjected to an air flow F, enabling damaging flutter to be suppressed.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: January 24, 2012
    Assignee: Rolls-Royce PLC
    Inventor: Christopher Wright
  • Patent number: 8100404
    Abstract: In order to provide simpler manufacture and lift up and blow down control, leaf elements are provided which have profile edges arranged to associate with each other in order to create a ring carousel, either about the front or rear edge of a leaf seal arrangement. In such circumstances gas flow through the leaf seal arrangement encounters the profile edge in order to adjust leaf section position for appropriate sealing efficiency.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: January 24, 2012
    Assignee: Rolls-Royce PLC
    Inventor: David S Williams
  • Patent number: 8082680
    Abstract: A shoe device secured to a syphon is disclosed for removing condensate from an internal surface of a rotating cylinder. The shoe device includes a shoe portion which is disposed adjacent to the internal surface of the rotating cylinder. The shoe portion defines a passageway having an upstream and a downstream end. The passageway permits a flow there through of the condensate from the internal surface of the rotating cylinder, through the upstream end of the passageway to the downstream end of the passageway. The shoe portion has a first and a second side, a surface extending between the first and second sides of the shoe portion. The surface is disposed adjacent to the internal surface of the cylinder. The shoe portion also has a leading and a trailing end and a face extending between the leading and trailing ends of the shoe portion. A clamp is secured to a distal end of the syphon and is connected to the shoe portion for clamping the shoe portion to the syphon.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: December 27, 2011
    Assignee: Kadant Inc.
    Inventors: Alan T Ives, Gregory L. Wedel
  • Patent number: 8066286
    Abstract: The invention relates to a multistage brush seal of a steam turbine that comprises several brushes which in turn comprise several bristles. A plurality of brushes are arranged next to each other and are configured different from each other with regard to the length of the bristles, or to the bristle thicknesses, or to the bristle rigidities, or to the lay angle of the bristles, or to the height of a first guard ring in front of or behind the brush seal in the flow direction, which delimits this brush seal, or to a gap between the bristles and an opposing surface.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: November 29, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Matthias Neef, Norbert Sürken, Karl Urlichs
  • Publication number: 20110285090
    Abstract: A seal assembly for sealing a stationary component and a rotating component including a seal tooth mating surface for mating with a seal tooth, the seal tooth mating surface including a plateau portion for sealingly receiving the seal tooth during a steady-state operation of the seal assembly and a first concave portion adjacent to the plateau portion for receiving the seal tooth with a clearance during a first non-steady-state operation of the seal assembly, wherein the seal tooth is coupled to one of the stationary component and the rotating component and the seal tooth mating surface is coupled to the other of the stationary component and the rotating component.
    Type: Application
    Filed: May 18, 2010
    Publication date: November 24, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Xiaoqing Zheng
  • Publication number: 20110272891
    Abstract: A method for fabricating a brush seal assembly comprising, bending a first plate member to a helical shape, bending a second plate member to a helical shape, securing the first plate member to a drum, winding a wire material around the drum and the first plate member, securing the second plate member to the drum, attaching the second plate member and the first plate member to the wire, and cutting the wire to define a bristle length.
    Type: Application
    Filed: July 18, 2011
    Publication date: November 10, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: William Edward Adis, Bernard Arthur Couture, JR., Marshall Gordon Jones, Michael Dennis Mack, Daniel Frederick Purdy
  • Patent number: 8055315
    Abstract: There are a first packing 31 and a second packing 32 for covering and sealing a first opening portion 11a and a second opening portion 12a other than a groove portion 31a and a groove portion 32a for leading an FPC 20. The first packing 31 and the second packing 32 wipe surfaces of the FPC 20 coming in and going out of the groove portion 31a and the groove portion 32a by sliding operation of a second frame 12.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: November 8, 2011
    Assignee: NEC Corporation
    Inventor: Takehiko Komiyama
  • Patent number: 8043012
    Abstract: A seal arrangement for sealing a bearing comprising a first component and a second component which are rotatably movable with respect to each other is provided. The seal arrangement includes brush seal having an annular brush body carried by the first component and a bundle of resiliently bendable bristles. The brush seal is adapted to maintain a sealing condition when the first and second component are moved relative to each other in a non-rotational manner. Further, a brush seal and a wind turbine having a brush seal are provided.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: October 25, 2011
    Assignee: General Electric Company
    Inventors: Peter Rogall, Meng Gao, Yuanyuan Qiu
  • Patent number: 8028996
    Abstract: A brush sealing system includes a plurality of bristles, each having a first end coupled to a holding device and a second end protruding outwards from the holding device. One or more shims are disposed between the first end of each of the bristles and the holding device; wherein the shims are configured to controlling a pinch point diameter of the bristles.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: October 4, 2011
    Assignee: General Electric Company
    Inventors: Eric John Ruggiero, Roderick Mark Lusted
  • Patent number: 8028977
    Abstract: The invention relates to a device for supporting sheet-like materials for at least one separating process in the sheet-like materials, with at least one jet cutter device which may be displaced in the Y-direction during a separation process, with a first and second support surface together forming a support table for supporting the sheet-like material and with a jet trapping device, arranged between the first and second support surfaces and provided to be able to be displaced in the X-direction. The first and the second support surfaces are made from a flexible material forming part of at least one enclosed chamber, filled with a gas under pressure.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: October 4, 2011
    Assignee: TRUMPF Werkzeugmaschinen GmbH + Co. KG
    Inventors: Martin Blaser, Daniel Graf, Eberhard Wahl
  • Patent number: 8025296
    Abstract: In a shaft sealing mechanism which prevents fluid from flowing in an axial direction of a rotor through an annular gap between the rotor and a stator, there are provided a high pressure side plate positioned on a high pressure side region of a plurality of sheets, and a low pressure side plate positioned on a low pressure side region of the plurality of sheets, and construction is such that in a state in which the plurality of sheets is fixed on a stator side, and when under gas pressure, the sheets make contact with each other.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: September 27, 2011
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Takashi Nakano, Shin Nishimoto, Hirokazu Shirai, Toshio Asada
  • Publication number: 20110227289
    Abstract: The invention relates to a brush seal to seal a gap between two structural components, in particular between a rotor and a stator, having a bristle packet comprising bristles, with the bristles of the bristle packet being firmly attached to a bristle carrier via a fixation element. According to the invention, the bristle packet comprises several layers of bristles that are made of different materials.
    Type: Application
    Filed: December 2, 2009
    Publication date: September 22, 2011
    Applicant: MTU AERO ENGINES GMBH
    Inventor: Beichl Stefan
  • Patent number: 8011666
    Abstract: A seal capable of providing a seal for an air gap between a rotor and a stator. The seal incorporates a container for the textile insulators fixed on the rotor or the stator. The textile insulators are subjected, on one side, to an upstream pressure and, on another side, to downstream pressure, the upstream pressure being greater than the downstream pressure. The textile insulators are supported on the stator or the rotor so as to be at an angle to the side of the seal where the pressure is lower, namely the downstream pressure.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: September 6, 2011
    Assignee: Snecma
    Inventor: Daniel Georges Plona
  • 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: 20110204573
    Abstract: A brush seal, brush seal segment, and brush seal backplate for use in a rotary device are provided. In one embodiment, the invention provides a brush seal for a rotary device, the brush seal comprising: a plurality of brush seal segments, each segment including: an arcuate fence; an arcuate backplate circumferentially coextensive with the arcuate fence, the arcuate backplate including: a plurality of circumferentially-oriented cavities; a first dam along a first end of the arcuate backplate, the first dam substantially closing an end of at least one of the plurality of circumferentially-oriented cavities; and a second dam along a second end of the arcuate backplate, the second dam substantially closing an end of at least one of the plurality of circumferentially-oriented cavities; a plurality of brush bristles between the arcuate backplate and the arcuate fence; and a static member to which at least one of the plurality of brush seal segments is affixed.
    Type: Application
    Filed: February 23, 2010
    Publication date: August 25, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Xiaoqing Zheng, William Edward Adis, Michael Dennis Mack
  • Publication number: 20110200432
    Abstract: A reverse flow tolerant brush seal arrangement for restricting the transfer of a pressurized fluid between a first and a second chamber along a moving shaft. Opposing backing plates are provided to stiffen brush bristle alignment on the moving shaft. Differential pressure between the chambers is aided by spring biasing to seat axial movement of a sliding brush seal against one of the opposing backing plates for stiffening to maintain a design clearance with a shaft being sealed.
    Type: Application
    Filed: February 16, 2010
    Publication date: August 18, 2011
    Inventors: Rakesh V. Alamsetty, William E. Adis, Mahendra S. Mehra, Nestor Hernandez Sanchez, Rajasekar Natarajan, Akshay A. Datye
  • Publication number: 20110175296
    Abstract: A brush seal having bristles of a diameter of between 0.005 mm to 0.02 mm manufactured from an oxidation resistant metal alloy including between 10 and 60% cobalt as a base alloy having no more than 1% creep after a 1000 hours at 650° C. at a pressure of at least 345 Pa.
    Type: Application
    Filed: August 18, 2008
    Publication date: July 21, 2011
    Applicant: Cross Manufacturing Company (1938) Ltd
    Inventor: Aaron Bowsher
  • Patent number: 7980562
    Abstract: Seal arrangements utilizing leaf seal elements are susceptible to excessive wear at their tips due to blow-down pressures. When the seal element is forced against a rear surface across the pressure differential between the sides A, B of an arrangement. These tips may be forced into engagement with the rotating shaft and therefore wear on the shaft as well as at the tip occurs. By providing channels which extend laterally across more than one seal element pressure relief is maintained and therefore a limit to blow-down force maintained. The channels also extend radially and normally on a low pressure side of the seal arrangement.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: July 19, 2011
    Assignee: Rolls-Royce PLC
    Inventor: David S Williams
  • Patent number: 7976026
    Abstract: A method and seal assembly for a rotary machine including a rotary component and a stationary component is provided. The method includes providing a seal housing including a front plate and a back plate that is spaced from the front plate such that a cavity is defined between the front plate and the back plate. The method also includes coupling a plurality of flexible compliant plates to at least one of the seal housing and the stationary component such that the compliant plates are spaced from the front plate and the back plate within the cavity, and coupling at least one projection to at least one of the seal housing and the compliant plates such that the at least one projection facilitates reducing flow through at least one of a first axial gap and a second axial gap that are defined between the seal housing and the compliant plates.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: July 12, 2011
    Assignee: General Electric Company
    Inventors: Nikhil Kumar Verma, Imdad Imam, Vineet Ghate, Sean Douglas Feeny, William Edward Adis, Shorya Awtar, Jason Paul Mortzheim
  • Patent number: 7967297
    Abstract: A brush seal for use with a housing and sealing a high pressure area from a low pressure area is provided. In an embodiment, the brush seal includes a retainer and a plurality of bristles. The retainer is comprised of a thermally-sensitive material having a thermal expansion rate. The bristles are connected to and extend from the retainer. In an embodiment, the retainer is not fixedly connected to the housing, and the thermal expansion rate of the retainer is greater than the thermal expansion rate of a portion of the housing adjacent the retainer. In another embodiment, a joint associated with a plurality of bristles is permitted to move into a headspace provided above the joint. A method for making a control-gap brush seal assembly for use in connection with a shaft is also disclosed.
    Type: Grant
    Filed: March 13, 2007
    Date of Patent: June 28, 2011
    Assignee: Eaton Corporation
    Inventors: Xiaoqing Zheng, Charles A. Trabert, Anthony G. O'Meara, Joshua J. Duquette
  • Publication number: 20110135453
    Abstract: A leaf seal 10 in a rotary machine is located between a higher pressure region 14 and a lower pressure region 16 of the machine. Blow-down forces are greater on the lower pressure side 16 of the leaf seal 10 than on its higher pressure side 14, resulting in greater inward deflection of the leaves 20 on the lower pressure side of the seal than on its higher pressure side, leading in turn to greater wear of the leaves and the contacting rotor surface 44 on the lower pressure side 16 of the seal. To counteract this, the free ends 36 of the leaves 20 can be given a tapered profile 42 to gradually reduce the length of each leaf 20 over its width ‘w’ from its higher pressure side 14 to its lower pressure side 16, so that the leaves 20 are free to deflect under the blow-down forces by the amount of their reduction in length (a maximum of ‘x’), before they contact the rotor surface.
    Type: Application
    Filed: January 21, 2011
    Publication date: June 9, 2011
    Inventor: Neil Howes
  • Patent number: 7950671
    Abstract: A brush seal assembly including a pair of annular plates (11,12) defining an annular slot (14) between them and a radially outer chamber (15) opening into the slot (14); and an annular brush seal (13) having bristles (16) and an enlarged portion (17) at its outer periphery formed by welding the bristles (16) together, the brush seal (13) extending through the slot (14) with its enlarged portion (17) retained in the chamber (15) wherein at least a portion of one of the plates (11, 12) has an extension thereof which is deformed over the other plate (11, 12) to hold the plates (11, 12) together to form the assembly characterised in that one of the plates (12) has a flat face in the region of the slot (14).
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: May 31, 2011
    Assignee: Cross Manufacturing Company (1938) Limited
    Inventor: Peter Francis Crudgington
  • Publication number: 20110121517
    Abstract: A brush seal assembly including a pair of annular plates defining an annular slot between them and a radially outer chamber opening into the slot; and an annular brush seal having bristles and an enlarged portion at its outer periphery formed by welding the bristles together, the brush seal extending through the slot with its enlarged portion retained in the chamber wherein at least a portion of one of the plates has an extension thereof which is deformed over the other plate to hold the plates together to form the assembly characterised in that one of the plates has a flat face in the region of the slot.
    Type: Application
    Filed: February 4, 2011
    Publication date: May 26, 2011
    Inventor: Peter Francis Crudgington
  • Patent number: 7938403
    Abstract: A circumferentially extending brush seal positioned between static and rotary components of a machine and, during operation of the machine, the brush seal having a higher pressure region at an upstream side and a lower pressure region at a downstream side. The brush seal may include a plurality of bristles forming a bristle pack carried by the static component and cantilevered toward the rotary component such that tips of at least some of the bristles engage the rotary component. The brush seal further may include a pressure plate and a bristle pack backing plate. The bristle backing plate may include a plurality of radially extending and circumferentially spaced slots opening through opposite sides thereof. The slots may be disposed on an inner radial edge and an outer radial edge of the bristle backing plate.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: May 10, 2011
    Assignee: General Electric Company
    Inventors: Vishwas K. Pandey, Bernard A. Couture, Jr., William E. Adis, Michael D. Mack, Xiaoqing Zheng, Hemant V. Gedam
  • Patent number: 7931276
    Abstract: A brush seal, comprising: a bristle arrangement with a plurality of bristles; and a joint securing the bristles together; plates flanking the bristle arrangement; and a feature on the plates to receive the joint. A brush seal, comprising: a plurality of bristles, each having a first end and an opposed second end; and plates receiving the bristles therebetween, each having a first end and a second end. The first ends of the bristles extend past the first end of the plates and the second ends of the bristles reside between the first and second ends of the plates. A method of repairing a brush seal, comprising the steps of: providing a brush seal having a bristle arrangement secured between plates; removing the bristle arrangement from the plates; providing a replacement bristle arrangement; and placing said replacement bristle arrangement between the plates.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: April 26, 2011
    Assignee: United Technologies Corporation
    Inventors: John A. Szymbor, Mark E. Addis
  • Publication number: 20110072831
    Abstract: An apparatus is provided for sealing a channel fluidly connecting between a high pressure zone and a low pressure zone. The apparatus has at least two brush seal elements provided in the channel in series in a direction from the high pressure zone toward the low pressure zone to define an intermediate zone between the brush seal elements. The intermediate zone is fluidly connected to the low pressure zone through a bypass or passage, allowing a fluid in the intermediate zone to flow in part through the bypass to the low pressure zone.
    Type: Application
    Filed: September 22, 2010
    Publication date: March 31, 2011
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventor: Kazuhiko TANIMURA
  • Patent number: 7909335
    Abstract: A seal arrangement for sealing the space between a rotating element and a stationary element, the sealing arrangement comprising a compliant plate seal housing supported adjustably in the stationary element, the compliant plate seal housing supporting a compliant plate seal; and a spring system provided between the compliant plate seal housing and the stationary element to bias the compliant plate seal housing in a direction away from a surface of the rotating element. Alternatively, or additionally, one or more actuators may be provided to move the compliant plate seal housing in a direction away from a surface of the rotating element.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: March 22, 2011
    Assignee: General Electric Company
    Inventors: Norman A. Turnquist, Frederick G. Baily, Bernard A. Couture, Jr., Jason P. Mortzheim, Sean D. Feeny, William E. Adis, Shorya Awtar, Nikhil K. Verma
  • Patent number: 7909334
    Abstract: A sealing arrangement for a non-hermetic seal between a stator and a rotor includes a brush gasket having a plurality of bristles wound around a core element and affixed to the core element with a clamping element. The brush gasket is disposed at least partially in a receiving space delimited by a support element and by a cover element. The support element, the cover element, and the brush gasket are secured using at least one fitting element in at least one recess, especially in an axial groove or bore, in the stator. In addition to being positioned by using the at least one fitting element, the components may also be affixed to the stator using an attachment element.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: March 22, 2011
    Assignee: MTU Aero Engines GmbH
    Inventors: Stefan Beichl, Christoph Cernay, Alfons Gail, Erhan Ücgül
  • Publication number: 20110049810
    Abstract: A brush seal usable in high temperature sealing applications having brush bristles and a sealing membrane of stress and deflection accommodating construction capable of longitudinal extensibility. Sealing membrane has one portion slidably overlapped with another portion. In one embodiment, membrane is folded over itself providing slidable overlapping in one direction and is formed of overlapping membrane sheets providing slidable overlapping in another direction. In another embodiment, membrane has spaced apart deformation regions providing longitudinal extensibility in accommodating stress and/or deflection. Membrane can be made of metallic foil having a thickness no greater than brush bristle width or diameter and is embeddable in bristles of the brush seal.
    Type: Application
    Filed: March 25, 2010
    Publication date: March 3, 2011
    Inventors: Roger Ferryman, Patrick Fitzgerald
  • Publication number: 20110018204
    Abstract: A brush seal and a method for mounting a brush seal is disclosed. The brush seal includes a sealing element provided with a plurality of filaments or wires that are joined at a filament or wire end to form a filament or wire bundle and a clamp-like sealing housing for receiving and fixing the filament or wire end between a first and a second limb and for fixing the brush seal in a mounting recess of a housing. A free end of the filament or wire bundle of the sealing element is clamped between a partial area of an inner contour of the second limb that is adjacent to a region of an outlet opening of the mounting recess of the housing and an area of the outlet opening that is opposite from the partial area.
    Type: Application
    Filed: January 20, 2009
    Publication date: January 27, 2011
    Applicant: MTU Aero Engines GmbH
    Inventor: Stefan Beichl
  • Patent number: 7862047
    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: Grant
    Filed: October 17, 2008
    Date of Patent: January 4, 2011
    Assignee: MTU Aero Engines GmbH
    Inventors: Stefan Beichl, Carsten Butz, Christoph Cernay
  • Publication number: 20100327535
    Abstract: A fiber brush seal attached with metallic structure, suitable for use with SiC-SiC ceramic matrix composite (CMC) components. The fibers may be selected from oxides, carbides and nitrides of silicon, tungsten, chromium, iron, titanium, boron, zirconium and aluminum, and may optionally be coated with a boron nitride based coating.
    Type: Application
    Filed: March 17, 2010
    Publication date: December 30, 2010
    Applicant: General Electric Company
    Inventors: Christopher Grace, Mark Stewart Schroder, Paul Stephen Dimascio
  • Publication number: 20100327534
    Abstract: A magnetic brush seal system for use with a rotating component and a stationary component. The magnetic brush seal system may include a brush seal for engagement with the rotating component and a magnetic system positioned about the stationary component. The magnetic system may he in communication with the brush seal so as to retract the brush seal from the rotating component.
    Type: Application
    Filed: June 26, 2009
    Publication date: December 30, 2010
    Applicant: General Electric Company
    Inventors: Shridhar R. Powar, Shubhra Bhatnagar
  • Publication number: 20100327536
    Abstract: A brush seal and a method for mounting a brush seal is disclosed. The brush seal includes a sealing element provided with a plurality of filaments or wires that are joined at a filament or wire end to form a filament or wire bundle. The filament or wire end is arranged in a mounting recess of a housing. A free end of the filament or wire bundle protrudes from the housing and is opposite from the filament or wire end. At least one projection is formed on an inner contour of the mounting recess in such a manner that the filament or wire bundle is clamped by the projection at a predefined distance from the filament or wire end.
    Type: Application
    Filed: January 20, 2009
    Publication date: December 30, 2010
    Applicant: MTU Aero Engines GmbH
    Inventor: Stefan Beichl
  • Publication number: 20100320696
    Abstract: The invention relates to a sealing arrangement for a non-hermetic seal of a gap (11) between a stator and a rotor with a brush seal (13), wherein the brush seal (13) has a bristle package (14) with several bristles (15), the bristles are wound about a core element (16) and fixed to the core element (16), wherein the brush seal (13) is disposed at least sectionally in an accommodating space, which is bounded by a supporting element (18) and a covering element (19), and wherein the bristles (15) have sealing bristle sections (21), which are at an angle to the bristle shafts (20) and the ends of which run against a sealing surface (22) of the rotor (12). According to the invention, the covering element (19) has a support surface (23) at an end adjacent to the sealing bristle sections (21), wherein the supporting surface (23) contacts the bristle shafts (20) in a defined, locally limited region, so that the radial mobility of the sealing bristle sections (21) is limited in the direction of the rotor (12).
    Type: Application
    Filed: October 11, 2007
    Publication date: December 23, 2010
    Applicant: MTU AERO ENGINES GMBH
    Inventors: Alfons Gail, Wilhelm Gräbeldinger, Alexander Rauschmeier