Brush Seal Patents (Class 277/355)
  • 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: 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
  • 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
  • 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: 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: 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: 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: 20100320697
    Abstract: The present invention provides a leaf seal device which is available to assemble easily and to control and to set an inclination angle and a space of a sealing section. In the leaf seal device of the present invention, a connection holding section 21 of a sealing plate 12 is bent at a first bending section 22. Thereby, since laminated a plurality of sealing plates 12 are engaged sequentially at the first bending section 22, a radial direction is defined so as to become easily assemble. Also, according to inclining a face 24 at an inner circumferential side of the connection holding section 21, a pitch and a space of a sealing section 31 are changed. Therefore, the space of the sealing section can be controlled, if controlling a bend angle of the first bending section 22.
    Type: Application
    Filed: February 9, 2009
    Publication date: December 23, 2010
    Applicant: EAGLE INDUSTRY CO., LTD.
    Inventor: Toru KONO
  • 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
  • Patent number: 7854584
    Abstract: A rotary machine includes a machine rotor, a bearing coupled to the machine rotor, a machine stator, and a sealing device disposed between the machine rotor and the machine stator. The sealing device includes a dry gas seal and first and second seals disposed between the dry gas seal and the bearing. One or both of the first and second seals includes a brush seal or more specifically a brush seal including a plurality of non-metallic fibers.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: December 21, 2010
    Assignee: General Electric Company
    Inventors: Roderick Mark Lusted, Christopher Edward Wolfe, Eric John Ruggiero, Gabriele Mariotti
  • Patent number: 7832734
    Abstract: A seal arrangement for a turbo-engine, for sealing a peripheral gap between a rotor and a stator is provided. The stator a seal holder provided with at least one groove for respectively receiving a segmented, dynamic seal. Segments of the dynamic seal are made up of a plurality of brush seal segments, and free ends of bristles of the brush seal segments extend in the radial direction project from the respective groove and lie on the rotor. The or every groove for receiving the brush-type seal segments is designed without an undercut, the brush-type seal segments being received in the respective groove without an undercut in a positive manner.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: November 16, 2010
    Assignee: MTU Aero Engines GmbH
    Inventors: Stefan Beichl, Alfons Gail
  • Patent number: 7828297
    Abstract: A leaf seal for sealing a shaft rotating about an axis, in particular in a gas turbine, includes a plurality of spaced-apart leaves disposed in a concentric circle around the axis and fixed in position. Each of the leaves includes a surface oriented essentially parallel to the axis and an integrally formed element configured to position and retain the leaves in the leaf seal.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: November 9, 2010
    Assignee: Alstom Technology Ltd.
    Inventors: Matthias Hoebel, Nigel Anthony Rhodes, Ian James Summerside
  • Patent number: 7827685
    Abstract: A seal and method of making seals utilises folds in order to form creases in a length of material such that the creases reinforce individual seal elements or surfaces whilst perforations or slots in a seal edge allow air leakage from one side of the seal element or surface to the other. Thus, air pressurisation can take place between spaced seal elements or surfaces and this allows air flotation or riding of a rotating component relative to a static housing component. The perforations are typically graduated from the seal edge in order to provide the best pressurisation and air-riding effect for proximity or gap control between the sealing edge and the rotating component surface. The slots effectively provide flexibility to the sealing edge such that the seal component emulates a brush seal.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: November 9, 2010
    Assignee: Rolls-Royce plc
    Inventor: Alison J McMillan
  • Publication number: 20100276890
    Abstract: The invention relates to a multistage brush seal of a steam turbine, the brush seal comprising several brushes which in turn comprise several bristles. Conventional multistage brush seals have a conservative configuration because a precise prediction regarding the pressure difference of a single stage is not possible. The aim of the invention is therefore to provide a brush seal that allows a more precise prediction in respect of the pressure difference in a single stage or brush and thus provides a more precise dimensioning of the brush seal while achieve possible savings. The invention proposes that the adjacently arranged brushes have a varying configuration in respect of different parameters.
    Type: Application
    Filed: January 23, 2007
    Publication date: November 4, 2010
    Inventors: Matthias Neef, Norbert Sürken, Karl Urlichs
  • Publication number: 20100270747
    Abstract: The invention provides, in one aspect, a brush seal comprising brush seal bristles made up of component brush seal filaments. The component brush seal filaments comprise a polyether ketone comprising structural units derived from a diaryl ketone and a diphenolic compound and having a glass transition temperature in excess of 100° C. In a particular embodiment, the component brush seal filaments comprise PEEK. The novel brush seals provided by the present invention present a number of advantages over conventional non-metallic brush seals comprising KEVLAR filaments, such as enhanced friction characteristics and greater stability to fluid lubricants comprising groups reactive with the amide moieties present in aramid filaments such as KEVLAR.
    Type: Application
    Filed: April 24, 2009
    Publication date: October 28, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Farshad Ghasripoor, Biao Fang, Eric John Ruggiero, Vasanth Srinivasa Kothnur
  • Patent number: 7785010
    Abstract: In order to provide a long-life, highly-reliable guide apparatus which exhibits dustproof performance and prevents intrusion of dust into the moving block in environments where there are lots of fine dust such as gypsum and ceramic powder and where no oil contents or oil contents are not liked, there is provided a guide apparatus having a track rail 11, in which rolling-element raceway grooves 12-1 to 12-4 are formed along a longitudinal direction thereof, and a moving block 20 attached to the track rail by way of a plurality of rolling elements in a relatively-movable manner, wherein an end-face dustproof brush 25, which has a brush member 36 whose tip end contacts a surface of the track rail 11 and which eliminates extraneous matters adhering to the surface of the track rail 11 by means of the brush member 36, is attached to outside of each of the side covers 22 with respect to the direction of relative movement.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: August 31, 2010
    Assignee: THK Co., Ltd.
    Inventors: Hidekazu Michioka, Daisuke Yatsushiro, Tadashi Hirokawa, Yoshiaki Saito
  • Patent number: 7775527
    Abstract: A shaft sealing arrangement for a pump for delivering hot fluids includes a dynamic shaft seal (4), in particular a slide ring seal, in order to seal a rotatable shaft (2) relative to a housing (1), and a cooling ring (5) which is mounted in front of the dynamic shaft seal (4) in the direction of the pump interior and which surrounds the shaft (2) at a small spacing. The shaft sealing arrangement further includes an additional seal (8) which seals the shaft (2) in the region of the cooling ring (5) in order to reduce the feed of hot fluid into the gap between the shaft (2) and the cooling ring (5), with the additional seal (8) being formed as a brush seal.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: August 17, 2010
    Assignee: Sulzer Pumpen AG
    Inventor: Paul Meuter
  • Publication number: 20100201073
    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: February 6, 2009
    Publication date: August 12, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: William Edward Adis, Bernard Arthur Couture, JR., Marshall Gordon Jones, Michael Dennis Mack, Daniel Frederick Purdy
  • Publication number: 20100181043
    Abstract: A regenerative air preheater with brush seals (23) is proposed.
    Type: Application
    Filed: July 18, 2007
    Publication date: July 22, 2010
    Inventors: Ulrich Mueller, Ewald Kitzmann, Volker Schuele
  • 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
  • Publication number: 20100171270
    Abstract: A sealing device for a coolant supply on a rotating spindle is characterized in that a first brush seal (4) and a second brush seal (5) are arranged one after another in series on the spindle (2). Hereby the technical problems of the prior art are avoided and an improved device is made available, which makes possible a reliable sealing of the supply of coolant to a quickly rotating tool spindle, which exhibits no sudden failure, and which nonetheless is cost-advantageous in production and installation.
    Type: Application
    Filed: July 2, 2008
    Publication date: July 8, 2010
    Applicant: MTU AERO ENGINES GMBH
    Inventors: Alfons Gail, Stefan Beichl
  • Publication number: 20100164177
    Abstract: A multi-stage brush seal and assembly for sealing a circumferential gap with respect to a sealed component is disclosed. The brush seal includes a first stage including a first plurality of bristles and a second stage including a second plurality of bristles. In an embodiment, the first stage is configured with an initial first-stage clearance and seals said sealed component at high pressure and low pressure conditions, and the second stage is configured to have an initial second-stage clearance greater than the initial first-stage clearance so that the second stage does not seal said sealed component at the low pressure condition but is configured to be activated by a blow-down effect to seal said sealed component at the high pressure condition. In embodiments the brush seal includes features to enhance or reduce pressure blow-down with respect to the first-stage clearance.
    Type: Application
    Filed: December 30, 2008
    Publication date: July 1, 2010
    Applicant: Eaton Corporation
    Inventors: Xiaoqing Zheng, Joshua J. Duquette
  • Publication number: 20100164178
    Abstract: A front plate and brush seal assembly for providing a seal between a high pressure area and a low pressure area. An embodiment of a front plate includes a front plate body. The front plate body includes an inner peripheral edge and an outer peripheral edge. A plurality of cuts or slots are provided in the front plate body and extend from the outer peripheral edge of the front plate body toward the inner peripheral edge of the front plate body, such that the plurality of cuts or slots do not extend to the inner peripheral edge, and the plurality of cuts or slots define a plurality of fingers in the front plate body. In an embodiment of a brush seal assembly, the assembly includes a retaining plate that is connected to a front plate.
    Type: Application
    Filed: December 31, 2008
    Publication date: July 1, 2010
    Applicant: Eaton Corporation
    Inventor: John F. Short
  • Patent number: 7744092
    Abstract: A method and seal assembly for sealing a rotary machine including a rotary component and a stationary component is provided. The method includes providing a plurality of flexible leaf plates in an opening defined between a pair of spaced walls that include an adjustable front wall and an adjustable back wall that is opposed to the front wall. The method also includes adjusting a width of the opening by axially adjusting at least one of the front and back walls with respect to a central rotational axis of the rotary component.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: June 29, 2010
    Assignee: General Electric Company
    Inventor: Jason Paul Mortzheim
  • Patent number: 7744093
    Abstract: A seal and method of making seals utilizes folds in order to form creases in a length of material such that the creases reinforce individual seal elements or surfaces while perforations or slots in a seal edge allow air leakage from one side of the seal element or surface to the other. Thus, air pressurization can take place between spaced seal elements or surfaces and this allows air flotation or riding of a rotating component relative to a static housing component. The perforations are typically graduated from the seal edge in order to provide the best pressurization and air-riding effect for proximity or gap control between the sealing edge and the rotating component surface. The slots effectively provide flexibility to the sealing edge such that the seal component emulates a brush seal.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: June 29, 2010
    Assignee: Rolls-Royce plc
    Inventor: Alison J McMillan
  • Patent number: 7743498
    Abstract: A method of processing seals (20), like leaf seals, in which seals (20) an annular gap, formed between two coaxial, cylindrical surfaces, is sealed off in the axial direction by a multiplicity of individual, thin sealing elements (22; 22a, b) which, with an orientation deviating from the radial direction, extend transversely through the gap and are fixed at their end assigned to the one cylindrical surface and bear loosely with the other, free end against the other cylindrical surface.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: June 29, 2010
    Assignee: ALSTOM Technology Ltd.
    Inventor: Nigel Anthony Rhodes
  • 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