Labyrinth Patents (Class 277/412)
  • Patent number: 10731653
    Abstract: An electric motor assembly includes a bearing assembly including a rotating component and at least one stationary component. The electric motor assembly also includes an impeller coupled to the rotating component. The impeller includes an inlet and an outlet and is configured to direct a fluid between the inlet and the outlet. The electric motor assembly also includes a rotor assembly directly coupled to the impeller. A fluid flow channel is defined between the rotating component and the at least one stationary component. The flow channel includes a first end proximate the impeller outlet and a second end proximate the impeller inlet.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: August 4, 2020
    Assignees: REGAL BELOIT AUSTRALIA PTY LTD, REGAL BELOIT AMERICA, INC.
    Inventors: Matthew J. Turner, Greg Heins, Mark Thiele, Jason Jon Kreidler
  • Patent number: 10731499
    Abstract: A seal device for a turbine is disposed around a rotor so as to separate a high-pressure space and a low-pressure space and includes: a plurality of thin plates arranged along an outer peripheral surface of the rotor. Each of the thin plates has a thin-plate tip surface facing the outer peripheral surface of the rotor; a first side plate disposed so as to face the high-pressure space and covering outer peripheral regions of first side surfaces; and a second side plate disposed so as to face the low-pressure space and covering outer peripheral regions of second side surfaces. The first side surface of each of the thin plates is covered with the first side plate in a region extending further to an inner side, in a radial direction of the rotor, than a region of the second side surface covered with the second side plate.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: August 4, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Azumi Yoshida, Hidekazu Uehara, Hiroharu Oyama, Kohei Ozaki, Katsuhisa Hamada, Hideaki Sugishita, Toyoharu Nishikawa, Yoshihiro Kuwamura, Kohei Hatano, Keisuke Matsuyama
  • Patent number: 10661906
    Abstract: A housing for an air cycle machine includes a housing with a first end and a second end opposite the first end, a first duct adjacent the first end of the housing with an air inlet and an air outlet, a second duct adjacent the second end of the housing with an air inlet and an air outlet, and a collar in the housing extending into the second duct. The collar includes a first annular surface facing radially inward and configured to engage a journal bearing and a second annular surface facing radially inward and configured to engage a rotating shaft, wherein the second surface is monolithic with the housing.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: May 26, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Craig M. Beers, Christopher McAuliffe, Brent J. Merritt
  • Patent number: 10641278
    Abstract: A sealing device includes: a sealing body that seals a gap between a rotor and the sealing body; a fastening bolt that fixes the sealing body to a stator; and a bolt sealing part that seals a gap around the fastening bolt. The sealing body includes: a facing surface that faces a fixing surface of the stator facing in an axial direction; and a body through-hole that penetrates the sealing body and opens on the facing surface. The bolt sealing part is disposed in a gap between a head portion and the inner peripheral surface of the body through-hole, or between the fixing surface and the facing surface.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: May 5, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventor: Hiroki Urushidani
  • Patent number: 10605369
    Abstract: A sealing apparatus includes a sealing apparatus body attached to an outer ring of a hub bearing, and a slinger attached to a hub, and the sealing apparatus body includes a reinforcement ring and an elastic body portion. The elastic body portion includes seal lips contacting the slinger, and a labyrinth lip forming a gap from the slinger. The slinger includes a slinger cylinder portion, a slinger flange portion, a slinger bent portion, and a slinger extended portion, and the slinger bent portion and the slinger extended portion form a labyrinth seal L1, having gaps between the elastic body portion and the outer ring.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: March 31, 2020
    Assignee: NOK CORPORATION
    Inventor: Takuya Kato
  • Patent number: 10458267
    Abstract: The present disclosure is directed to a gas turbine engine including a turbine rotor, a turbine frame at least partially surrounding the turbine rotor, and an outer diameter seal assembly. The turbine rotor includes an inner shroud, an outer shroud, and at least one connecting airfoil coupling the inner shroud and the outer shroud. The outer shroud includes a plurality of outer shroud airfoils extended inward along a radial direction. The outer diameter seal assembly includes a sliding portion disposed between the turbine frame and the outer shroud of the turbine rotor. The outer diameter seal assembly defines a secondary tooth at the outer shroud radially inward of a longitudinal face of the sliding portion, and a primary tooth defined axially adjacent to a radial face of the sliding portion.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: October 29, 2019
    Assignee: General Electric Company
    Inventors: Nathan Evan McCurdy Gibson, Darek Tomasz Zatorski
  • Patent number: 10359048
    Abstract: A sealing system for at least one floatingly mounted ring in a support for a rotary shaft rotatable about an axis directed along a longitudinal direction provides dynamic sealing between the shaft and the support. The system includes a coupling part interposed between the ring and the support, whereby the ring is secured to the support. A first cylindrical type joint directed with respect to a first transverse direction provides a joint between the support and the coupling part. A second cylindrical type joint directed with respect to a second transverse direction perpendicular to the first transverse direction provides a joint between the ring and the coupling part. A turbopump includes such rotary shafts and sealing systems.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: July 23, 2019
    Assignee: SAFRAN AIRCRAFT ENGINES
    Inventors: Laurent Paul Lattanzio Fabbri, Vincent Langlois, Cedric Sene
  • Patent number: 10323529
    Abstract: A turbine includes a rotor shaft having a plurality of rotating blades mounted on the rotor shaft, a bearing assembly rotatably supporting the rotor shaft, a casing forming a passage of a fluid and to include a space in which the rotating blades are disposed so that thermal energy of the fluid is converted into mechanical energy by rotation, a foundation fixedly supporting the bearing assembly, and a packing device installed in the rotor shaft for sealing between the casing and the rotor shaft and supported by the foundation. The casing comprises a connection unit extended toward the packing device and fixed to the casing so that a location of the connection unit is relatively changed with respect to the packing device. Accordingly, there is an advantage in that the leakage of a fluid is reduced because a clearance between the packing device and the rotor shaft is reduced.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: June 18, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Jun Ho Ahn
  • Patent number: 10316679
    Abstract: A seal structure (2) for sealing a gap between a first structure body (10) and a second structure body (51). The seal structure includes: a peripheral surface formed on one of the first structure body and the second structure body; a plurality of seal fins (5) provided at intervals in the axial direction so as to form clearances (m) together with the peripheral surface and protrusions that form re-adhesion edges between pairs of axially adjacent seal fins; the re-adhesion edges being locations at which leak currents (SL) re-adhere that have passed through a clearance (mA) of an upstream seal fin; and the protrusions forming first cavities in which eddies (B1) are created that flow along the upstream seal fin toward the second structure body, and second cavities in which currents (B2) are created that cause a contraction current effect on a clearance (mB) of a downstream seal fin.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: June 11, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Toyoharu Nishikawa, Yoshihiro Kuwamura, Hiroharu Oyama, Yoshinori Tanaka, Shin Nishimoto, Kazuyuki Matsumoto, Hidekazu Uehara
  • Patent number: 10208762
    Abstract: A device and method for reducing swirl in a gas compressor is provided. The device can include a tubular or annular seal body having an abradable interior surface for use in forming a seal. The tubular body can further have a plurality of swirl teeth arranged on a high pressure side of the seal body. The swirl teeth are disposed so as to form swirl slots between the adjacent swirl teeth. The swirl teeth can have a brake chord and a brake pitch describing the length and separation of each adjacent swirl tooth. The ratio of the brake pitch to the brake chord can be optimized in order to maximize creation of free vortices between the swirl teeth as the compressor rotates for swirl reduction.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: February 19, 2019
    Assignee: Solar Turbines Incorporated
    Inventors: Balaji Venkataraman, David Howard Moulton, Michael James Cave
  • Patent number: 10184347
    Abstract: A seal device includes a plurality of seal shoes, a seal base, a plurality of spring elements and a resilient biasing element. The seal shoes are arranged around an axis. The seal base circumscribes the seal shoes. Each of the spring elements is radially between and connects a respective one of the seal shoes and the seal base. A first of the spring elements includes a first mount, a second mount and a spring beam. The first mount is connected to a first of the seal shoes. The second mount is connected to the seal base. The spring beam connects the first mount to the second mount. The resilient biasing element is radially between and engaged with first and second components of the seal device, where the first component is configured as or otherwise includes the first mount or the second mount.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: January 22, 2019
    Assignee: United Technologies Corporation
    Inventor: Tara L. D'Ambruoso
  • Patent number: 10167901
    Abstract: A bearing isolator apparatus is for use in a piece of equipment which includes a rotatable shaft and a housing through which the shaft extends. The apparatus includes a static component for securing to the housing and a rotational component for securing to the shaft. A tortuous fluid path extends between the static component and the rotational component and a plurality of electrically conductive filaments extends between the static component and the rotational component, such that an electrical current can pass between the components. One or more conductive members electrically connect the rotor to the shaft.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: January 1, 2019
    Assignee: AES Engineering Ltd.
    Inventor: Oliver Pogmore
  • Patent number: 10161231
    Abstract: A plunger includes a sleeve having a passage therethrough and a valve member in the passage. When the plunger falls in a production string of a hydrocarbon well, the valve member is open and allows gas flow through the plunger. When the plunger contacts a liquid slug in the production string, the valve closes so that pressure from below reverses movement of the plunger so it pushes liquid above the plunger toward the earth's surface and ultimately to a well head where liquid and gas are separated.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: December 25, 2018
    Inventors: William Charles Harris, Edward Alexander Wells
  • Patent number: 10125785
    Abstract: A bladed rotor and a hub rotor for a gas turbine are provided. A bladed rotor may comprise a rotor interface comprising a radially inward surface, wherein the rotor interface comprises a constant diameter zone; and a reduced stress zone located adjacent to and aft of the constant diameter zone. A hub rotor may comprise a hub interface comprising a radially outward surface, wherein the hub interface comprises, a constant diameter zone, and a reduced stress zone located adjacent to and aft of the constant diameter zone.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: November 13, 2018
    Assignee: PRATT & WHITNEY
    Inventors: John E. Wilber, Bernard J. Reilly, Jeffrey M. Palitsch, Rimal Patel, Jesse T. Carmichael, Ryan H. Quinn
  • Patent number: 10100657
    Abstract: An assembly includes a monolithic carrier structure and a seal assembly. The monolithic carrier structure includes a carrier base and a support ring. The carrier base extends axially along the centerline. The support ring projects radially inward from the carrier base. The seal assembly is nested radially within the carrier base and axially next to the support ring. The seal assembly includes a seal base, a plurality of spring elements and a plurality of seal shoes arranged about the centerline in an annular array. The seal base circumscribes the annular array of the seal shoes. Each of the spring elements is radially between and connects a respective one of the seal shoes with the seal base.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: October 16, 2018
    Assignee: United Technologies Corporation
    Inventor: Conway Chuong
  • Patent number: 10054232
    Abstract: The invention relates to a sealing segment for sealing between a stationary component and a rotating component. The sealing segment having a passage that extends so as to enable pressure balancing between radial ends of the sealing segment so by providing a seal that can ensure a minimum seal distance is maintained without the need for the complexities of actuators or other mechanical devices.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: August 21, 2018
    Assignee: General Electric Technology GmbH
    Inventor: Jonathan David Seaton
  • Patent number: 10041579
    Abstract: A device includes a torque-proof first structural component and a second structural component rotatably connected to the first component. Hydraulic fluid is guided to lubrication points via the components. A sealing device seals an interface between the components. The interface includes a transition area limited by areas of the components that overlap in the radial direction and which carries hydraulic fluid, and which is connected to supply areas for hydraulic fluid of the first component and transmission areas for hydraulic fluid of the second component. The hydraulic fluid forms a floating hydrodynamic bearing between the components. The sealing device includes at least one thread area in the area of a surface of the second component or of the first component that is facing towards the surface of the first component or the second component.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: August 7, 2018
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventor: Gideon Venter
  • Patent number: 9970451
    Abstract: Embodiments of the present disclosure are directed towards a bearing of a rotor assembly having a first lubricant flow path configured to flow a first lubricant flow to a first bearing surface of the rotor assembly and a second lubricant flow path separate from the first lubricant flow path and configured to flow a second lubricant flow to a second bearing surface of the rotor assembly.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: May 15, 2018
    Assignee: Ingersoll-Rand Company
    Inventors: Thomas Edward Gerber, Johnathan David Clemons
  • Patent number: 9957817
    Abstract: A gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, an airfoil having a tip wall that joins outer spanwise ends of a suction sidewall and a pressure sidewall, a tip leakage control channel recessed into an outer surface of the tip wall, a tip leakage control vane integrally formed on the tip wall adjacent to the tip leakage control channel and an air seal radially outward of the tip wall and positioned to minimize leakage at the tip wall.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: May 1, 2018
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Mark F. Zelesky, Andrew S. Aggarwala
  • Patent number: 9951637
    Abstract: A rotary machine includes a machine rotor, a machine stator, a labyrinth seal disposed between the machine rotor and the machine stator, a dry gas seal disposed between the machine rotor and the machine stator, the dry gas seal being disposed downstream of the labyrinth seal, the labyrinth seal including a labyrinth seal rotor, and, a labyrinth seal stator, the labyrinth seal stator having a cavity containing a heat transfer medium configured to transfer heat between the labyrinth seal stator and a zone adjacent the labyrinth seal stator to cool or heat a pressurized process fluid before the process fluid bears against the dry gas seal.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: April 24, 2018
    Inventors: Matteo Berti, Stefano Bresciani, Ravindranath Ps, Lorenza Sassolini, Alessandro Ciani
  • Patent number: 9951629
    Abstract: An airfoil according to an exemplary aspect of the present disclosure includes, among other things, a suction sidewall and a pressure sidewall, each sidewall extending spanwise from an airfoil base and extending chordwise between a leading edge and a trailing edge. A tip wall extends chordwise from the leading edge to the trailing edge and joining respective outer spanwise ends of the suction and pressure sidewalls. A tip leakage control channel is recessed into the tip wall, the tip leakage control channel including a control channel floor that extends between a first control channel vane sidewall and a second control channel vane sidewall established by a corresponding tip leakage control vane. An internal cooling cavity is disposed between the suction sidewall and the pressure sidewall and a channel cooling aperture feeds airflow from the internal cooling cavity to the tip leakage control channel.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: April 24, 2018
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Mark F. Zelesky, Andrew S. Aggarwala
  • Patent number: 9909559
    Abstract: A method for performing uptower maintenance of a wind turbine in order to replace the main bearing on the turbine shaft is disclosed. Embodiments of this method to perform maintenance may include installing a rotor lock to resist rotation of the main shaft during maintenance, providing a lifting device in order to elevate the main shaft, removing the main bearing from its main bearing housing, and installing a replacement split main bearing. A crane may also be installed uptower to assist in the maintenance.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: March 6, 2018
    Assignee: Inventus Holdings, LLC
    Inventors: Martin E. Lohan, Per Eske Fenger, Charles Asheim, Miguel A. Gonzalez, Daniel M. Brake
  • Patent number: 9759091
    Abstract: A steam turbine of an opposed-current single-casing type has a high pressure turbine part and an intermediate-pressure turbine part housed in a single casing. A dummy ring partitions the high-pressure turbine part and the intermediate-pressure part, and a cooling steam supply path and a cooling steam discharge path are formed in the dummy ring in the radial direction. Extraction steam or discharge steam of the high-pressure turbine part, whose temperature is not less than that of the steam having passed through a first-stage stator blade, is supplied to the cooling steam supply path. The cooling steam is fed throughout the clearance to improve the cooling effect of the dummy ring and a turbine rotor. The cooling steam is then discharged through a cooling steam discharge path to a discharge steam pipe which supplies the steam to a subsequent steam turbine.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: September 12, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Junichi Ishiguro, Tatsuaki Fujikawa, Yoshinori Tanaka, Naoto Tochitani, Shin Nishimoto
  • Patent number: 9746085
    Abstract: A labyrinth seal for sealing a sealing region between a rotor and stator of a rotary machine includes, a base, and a plurality of sealing rings. The sealing rings are formed on the base, project into the sealing region and form, between them labyrinth valleys bounded, laterally, by the sealing rings and, in the floor of the valleys, by the base. The sealing rings, in at least one region, include at least one material which is different from that of the base.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: August 29, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Ralf Bode
  • Patent number: 9709056
    Abstract: In a hollow seal member kept in abutted-engagement with a shaft hole formed in a housing via an elastic body and kept in sliding-contact with an outer circumference of a drive shaft for sealing against a leakage of fluid from a pump chamber, the seal member is provided with a seal part formed within an area at one end and kept in sliding-contact with the outer circumference of the drive shaft over a given hollow inner circumferential surface, and a rotation-stopping part formed within an area at the other end for restricting a movement of the seal member in a rotation direction of the drive shaft. A rotational resistance of the rotation-stopping part to the drive shaft is set to be less than a rotational resistance of the seal part.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: July 18, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Chiharu Nakazawa, Masaki Misunou
  • Patent number: 9664198
    Abstract: An exhaust-gas turbocharger (1) having a turbine (2), which has a turbine wheel (3) surrounded by an intake duct (4), and having a VTG cartridge (5), which has a disk (6) and a vane bearing ring (7), which delimit the intake duct (4), and which has a plurality of vanes (8), which are arranged in the intake duct (4) and are mounted in the vane bearing ring (7) by way of rotatable vane shafts (9), which are connected to vane levers (10), the lever heads (11) of which engage into associated grooves (12) in a unison ring (13), which surrounds the vane bearing ring (7) on the outside, and which has an adjusting lever (14) which is operatively connected to an adjusting shaft (15) in order to transmit an adjusting torque to the unison ring (13). The adjusting lever (14) is of planar configuration.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: May 30, 2017
    Assignee: BorgWarner Inc.
    Inventors: Thomas Ramb, Dietmar Metz, Christian Haibt, Julia Nohl
  • Patent number: 9638052
    Abstract: There is described a seal assembly for a gas turbine engine comprising: a first seal having a sealing passage which defines a flow path trajectory for leakage air, the first seal for partitioning a first pressure area to a lower pressure area; a second seal located along the line of the flow path trajectory of the first seal, the second seal for partitioning a second pressure area and the lower pressure area; a deflection member located between the first seal and second seal, and in the trajectory of the flow path from the first seal.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: May 2, 2017
    Assignee: ROLLS-ROYCE plc
    Inventor: Andrew Shorney
  • Patent number: 9382813
    Abstract: Various embodiments include a turbomachine diaphragm ring. In various particular embodiments, a turbomachine diaphragm ring includes: a packing slot sized to house a dovetail section of a turbomachine packing, the packing slot extending circumferentially about a rotational axis of the turbomachine; a key slot connected with the packing slot sized to house a portion of a key member, the key slot extending at least one of radially or axially from the packing slot; and a retaining slot connected with the key slot and extending substantially circumferentially from the key slot, the retaining slot sized to house a retaining member for retaining the key member.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: July 5, 2016
    Assignee: General Electric Company
    Inventors: Thomas Robert Reid, James Peter Anderson, Steven Sebastian Burdgick, Mark Richard DeLorenzo
  • Patent number: 9297277
    Abstract: A power plant is provided and includes components for generating power from fluids at high and intermediate pressures, a pathway defined between the components along which a heated fluid flows to the one of the components for generating power from fluids at intermediate pressures and a circuit fluidly coupled to the pathway to cool a portion of the heated fluid prior to the portion of the heated fluid reaching the one of the components for generating power from fluids at intermediate pressures.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: March 29, 2016
    Assignee: General Electric Company
    Inventors: Debabrata Mukhopadhyay, Abhishek Agrawal, Vishwas Kumar Pandey, Nestor Hernandez Sanchez, Donkada Santhosh
  • Patent number: 9279324
    Abstract: Balance piston assembly, apparatus, and methods are provided. The assembly includes a balance piston coupled to a rotatable shaft and configured to rotate therewith, the balance piston including a first shelf and a second shelf, the first and second shelves being axially-overlapping and radially-offset. The assembly also includes a seal including a first sealing surface configured to seal with the first shelf and a second sealing surface configured to seal with the second shelf.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: March 8, 2016
    Assignee: Dresser-Rand Company
    Inventors: Stephen G. Clute, Mark J. Kuzdzal, Glenn R. Grosso, David J. Peer
  • Patent number: 9234434
    Abstract: An improved labyrinth seal is described with the seal including a group of several fins forming circumferential barriers against the flow of a working fluid between stationary and rotating parts in a turbine, wherein within the group the volume between the penultimate fin and the last fin is altered compared to the average volume between other adjacent fins of the group.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: January 12, 2016
    Assignee: ALSTOM Technology Ltd
    Inventors: Vasileios Stefanis, Christos Georgakis
  • Patent number: 9136151
    Abstract: An actuator comprising a first part and a second part, the first part being configured to move relative to the second part, wherein a labyrinth seal is provided between the first part and the second part, the labyrinth seal being configured to restrict the flow of gas from a first side of the labyrinth seal to a second side of the labyrinth seal, wherein one or more inlets and one or more outlets are provided within the labyrinth seal, the one or more inlets being configured to provide gas to a location within the labyrinth seal and the one or more outlets being configured to remove at least part of the gas from a location within the labyrinth seal.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: September 15, 2015
    Assignee: ASML Netherlands B.V.
    Inventors: Fredrik Wilhelm Van Der Blij, Edwin Johan Buis, Pieter Renaat Maria Hennus, Johannes Charles Adrianus Van Den Berg, Johannes Andreas Henricus Maria Jacobs
  • Patent number: 9016692
    Abstract: In sealing rings for a labyrinth seal that are arranged on a rotationally symmetrical component and in frictional contact with a stationary run-in layer, a part of the sealing ring (8) that contacts the run-in layer is in the form of a wear protection ring segment (15) that is built up on a truncated sealing ring (14) and which includes a metal matrix (16) with wear protection particles (13) embedded therein. The manufacture of the wear protection ring segment is carried out by laser build-up welding, wherein the proportion of wear protection particles contained in the metal powder flow supplied to the laser beam can be controlled and increased in an edge or tip region of the sealing ring.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: April 28, 2015
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventors: Thomas Haubold, Andreas Kohns
  • Publication number: 20150097342
    Abstract: One of the components (15), opposite a labyrinth seal (12), is arranged sliding on a conical interface (18) of its support (7, 19) and constructed from a material with different thermal expansions, so as to reduce the clearance with the component face to face (13, 14), at steady state, at high temperature. The sealing surface (25) may be assured by a circulation of oil.
    Type: Application
    Filed: October 8, 2014
    Publication date: April 9, 2015
    Applicant: SNECMA
    Inventors: Serge Rene MORREALE, Arnaud Jean-Marie PIERROT
  • Publication number: 20150098805
    Abstract: A seal assembly of an air cycle machine includes a seal plate with an outer diameter. A bore extends axially through a center of the seal plate and a seal land is disposed at least partially within the bore. The seal land includes an inner diameter and a minimum ratio between the inner diameter of the seal land and the outer diameter of the seal plate is approximately 0.1985.
    Type: Application
    Filed: October 9, 2013
    Publication date: April 9, 2015
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Craig M. Beers, Christopher McAuliffe
  • Patent number: 8991829
    Abstract: A non-contact labyrinth seal assembly, bearing assembly therewith, and method of construction thereof, has an outer rigid carrier and an inner sleeve. The carrier has an outer cylindrical flange and a radially inwardly extending leg and the sleeve has a cylindrical wall and a radially outwardly extending flange. A body is attached to at least one of the leg and the flange, wherein the body provides, at least in part, a purely non-contact labyrinth passage extending between the carrier and the sleeve.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: March 31, 2015
    Assignees: The Timken Company, Federal-Mogul Corporation
    Inventors: Scott B. Lattime, Kevin M. Dillon, Alicia Black, Richard Borowski, Roger Trentman, Stephen E. Brister, Carl F. Meadows, Brian M. Hupp, David G. Toth
  • Patent number: 8979093
    Abstract: A pressure balanced shaft seal assembly that allows a seal to dynamically respond to angular or radial misalignment of a shaft includes a fixed stator, a floating stator, and a labyrinth seal. In one embodiment, the floating stator and labyrinth seal are mounted within an annular groove formed in the fixed stator such that the floating stator and labyrinth seal may move a predetermined amount in the radial direction with respect to the fixed stator. A spherical interface between the labyrinth seal and floating stator may allow the labyrinth seal to pivot with respect to the floating stator during angular misalignment of a shaft around which the pressure balanced shaft seal assembly is mounted. A pressure balancing annular channel formed in the floating stator allows pressurized seal fluid to balance the axial pressure exerted on the floating stator by the process fluid.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: March 17, 2015
    Assignee: Inpro/Seal, LLC
    Inventors: David C. Orlowski, Neil F. Hoehle
  • Publication number: 20150071771
    Abstract: An inter-stage seal for a turbomachine includes a sealing member extending from a first end to a second end through an intermediate portion having a sealing surface, a first mounting member extending from a first end portion coupled to the sealing member adjacent the first end to a second, cantilevered end portion having a first rotor mounting element, and a second mounting member extending from a first end portion coupled to the sealing member adjacent the second end to a second, cantilevered end portion having a second rotor mounting element.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 12, 2015
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Thomas Joseph Farineau, Revanth Krishna Nallam
  • Patent number: 8936247
    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: Grant
    Filed: May 18, 2010
    Date of Patent: January 20, 2015
    Assignee: General Electric Company
    Inventor: Xiaoqing Zheng
  • Publication number: 20150014940
    Abstract: An illustrative embodiment of a shaft seal assembly generally includes a fixed stator, a floating stator, and a sealing member. In the illustrative embodiment the fixed stator may be formed with one or more fluid conduits that are in fluid communication with one or fluid conduits formed in the floating stator. The fluid conduits in the floating stator may be in fluid communication with one or more fluid conduits formed in a sealing member. A rotational interface may exist between the sealing member and a shaft, and the various fluid conduits may be configured to create a fluid barrier at that interface. Other embodiments of a shaft seal assembly may create a fluid barrier at a rotational interface between a rotor and a floating stator.
    Type: Application
    Filed: September 29, 2014
    Publication date: January 15, 2015
    Inventors: Neil F. Hoehle, Tom Horner
  • Publication number: 20150001812
    Abstract: An improved labyrinth seal is described with the seal including a group of several fins forming circumferential barriers against the flow of a working fluid between stationary and rotating parts in a turbine, wherein within the group the volume between the penultimate fin and the last fin is altered compared to the average volume between other adjacent fins of the group.
    Type: Application
    Filed: September 18, 2014
    Publication date: January 1, 2015
    Inventors: Vasileios STEFANIS, Christos GEORGAKIS
  • Publication number: 20150001811
    Abstract: A sealing device (1) is disclosed for sealing a radially inner gas channel (2) between a guide vane ring (4) and a rotor (6) of a turbomachine, wherein the sealing device (1) has a sealing ring (8) for forming a sealed space (10) with a rear segment, with an inner wall structure (30) oriented in the opposite direction, which are joined to each other via an annular arch (32), wherein the radial flange (18) transitions into the outer wall structure (28) and the cylinder (26) forms the sealing ring (8), wherein the inner wall structure (30) transitions, via an annular web (36), into at least one inner body segment (38, 50), wherein the sealing device (1) has a uniform, preferably relatively reduced wall thickness over its individual segments integrally formed with one another, so that the sealing device (1) is resilient within certain limits.
    Type: Application
    Filed: June 23, 2014
    Publication date: January 1, 2015
    Inventors: Manfred Feldmann, Thomas Hess
  • Patent number: 8919781
    Abstract: A self-adjusting non-contact seal for sealing the circumferential gap between a first machine component and a second machine component includes structure which undergoes wear in the event of inadvertent contact with one of the machine components in such a way as to allow a reset of its radial distance from such machine component, compared to initial installation tolerances, while minimizing leakage.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: December 30, 2014
    Assignee: Advanced Technologies Group, Inc.
    Inventor: John F. Justak
  • Patent number: 8911205
    Abstract: A knife edge seal assembly includes at least one knife edge and at least one honeycomb ring seal. The at least one knife edge has material removed to a first knife edge radial height and the least one honeycomb ring seal has material removed to a finished radial thickness for sealable engagement with the at least one knife edge. The finished radial thickness of the replacement honeycomb ring seal establishes a first radial gap between an inner annular surface of the replacement honeycomb ring seal and the knife edge before the knife edge seal assembly begins rotating in the gas turbine.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: December 16, 2014
    Assignee: United Technologies Corporation
    Inventors: William M. Rose, Robert A. Charbonneau
  • Publication number: 20140333032
    Abstract: A labyrinth seal includes a first labyrinth ring and a second labyrinth ring. In an installed state of the labyrinth seal, the first labyrinth ring and the second labyrinth ring engage in each other in an at least partially overlapping manner and are rotatable relative to each other. Furthermore, in the installed state, mutually-opposing surfaces of the first and of the second labyrinth ring have different wear resistances.
    Type: Application
    Filed: November 28, 2012
    Publication date: November 13, 2014
    Inventors: Andreas Kern-Trautmann, Mathias Seuberling
  • Publication number: 20140333031
    Abstract: A labyrinth sealing device is disclosed for use between a rotating shaft and a bearing housing. In some embodiments, an internal stator engages the housing and a rotor engages the shaft. A labyrinth pathway is defined between the rotor and stator to prevent the migration of lubricants and/or contaminants in either direction. The rotor acts as a running surface for the sealing element, but may also with a ground surface of the rotor to provide a pump that continuously draws lubricant away from the sealing lip toward a sump. In another embodiment, the stator and sealing element are combined as a single element formed from a sealing material. A recess in the sealing lip creates a pressure differential at the sealing surface and minimizes wear.
    Type: Application
    Filed: July 25, 2014
    Publication date: November 13, 2014
    Inventors: Christopher E. Tones, Gregory Burnett, Kwongvoon Wong, Earl J. Rogalski
  • Publication number: 20140319777
    Abstract: A rotating device includes a rotator on which a magnetic recording disk is to be mounted, and a stationary body that supports the rotator in a freely rotatable manner through a fluid dynamic bearing. A lubricant is continuously applied to a lubricant applied portion in a gap between the rotator and the stationary body and from a second capillary seal to a first capillary seal through a dynamic pressure generating portion of the fluid dynamic bearing. This rotating device is structured so as to reduce an amount of the lubricant spilled and eventually dissipated when shock of substantially 1200 G is applied to be less than 5% of the total amount of the lubricant.
    Type: Application
    Filed: April 28, 2014
    Publication date: October 30, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS JAPAN ADVANCED TECH. CO.
    Inventors: Ryusuke SUGIKI, Mitsuo KODAMA, Akira NISHIO
  • Patent number: 8864139
    Abstract: A non-contact labyrinth seal assembly includes a carrier having cylindrical outer flange with an annular leg extending inwardly therefrom. An elastomeric body is attached to the leg. The body has a first pair of seal lips extending radially inwardly in diverging relation from one another and a second pair of seal lips spaced radially outwardly from the first pair of seal lips. The second pair of seal lips includes radially outermost and a radially innermost seal lips. The radially outermost seal lip has a cylindrical inner surface and an inner surface of the radially innermost seal lip has a first portion extending substantially parallel to the cylindrical inner surface to form an annular channel and a second portion extending radially outwardly to an innermost lip free end that is radially aligned with the cylindrical inner surface to form an annular opening having a width less than a width of the channel.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: October 21, 2014
    Assignee: Federal-Mogul Corporation
    Inventors: Gerald A. Greca, Alicia Black
  • Patent number: 8844935
    Abstract: A sealing arrangement for a bearing assembly. The sealing arrangement can include a static seal carrier coupled to a static component of the bearing assembly and including a first plurality of rings, a rotating seal carrier coupled to a rotating component of the bearing assembly and including a second plurality of rings, the first plurality of rings and the second plurality of rings disposed in an interdigitated arrangement so as to define a tortuous passageway therebetween, the tortuous passageway having one end in communication with a high pressure area of the bearing assembly and a second end in communication with a low pressure area of the bearing assembly, and a scraper seal coupled to the rotating seal carrier and disposed over the second end of the tortuous passageway.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: September 30, 2014
    Assignee: Gamesa Innovation & Technology, S.L.
    Inventor: Juan Redin
  • Patent number: 8844936
    Abstract: According to one embodiment of the disclosure, an annular seal generally includes a hollow member having two ends and an inner surface. The hollow member has a number of depressions formed in and extending around its inner surface. Each of the depressions having a depth that is a function of its distance from one of the two ends.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: September 30, 2014
    Assignee: The Texas A&M University System
    Inventor: Dara W. Childs