Gap Or Clearance Patents (Class 277/411)
  • Patent number: 10077672
    Abstract: A ring-shaped compliant support for a gas turbine engine includes, among other things, an annular case, and an adjustment member that will turn relative to the annular case if exposed to thermal energy.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: September 18, 2018
    Assignee: United Technologies Corporation
    Inventor: Dmitriy A. Romanov
  • Patent number: 9951625
    Abstract: A turbine wheel for a turbine engine, comprising a disk carrying blades each having a platform, carrying an impeller connected by a stilt to a root. Each blade comprises an upstream radial wall and a downstream radial wall extending inwards from the platform of the blade. The roots of the blades are engaged into slots on the periphery of the disk, so that the radial walls of the blades and the platforms of the blades are circumferentially arranged end-to-end, and define inter-blade cavities radially inside the platforms, each accommodating an inter-blade sealing and vibration damping member. At least one member comprises an elastically deformable element configured so as to be elastically prestressed against the walls of a cavity in the member mounting position.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: April 24, 2018
    Assignee: SNECMA
    Inventors: S├ębastien Serge Francis Congratel, Maurice Guy Judet
  • Patent number: 9771817
    Abstract: A sealing system for a rotatable element defining an axis of rotation includes a rotor blade including a shank and an angel wing extending axially from the shank. The sealing system also includes a stator vane positioned axially adjacent the rotor blade. The stator vane includes a platform extending in an axial direction over the angel wing such that a clearance gap is defined therebetween. The sealing system also includes a sealing mechanism including a portion of the platform and a portion of the angel wing. The sealing mechanism includes at least one obliquely oriented surface such that the clearance gap defines a converging nozzle.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: September 26, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Eric John Ruggiero, Gregory Paul Rodebaugh, Rinaldo Luigi Miorini
  • Patent number: 9702371
    Abstract: The invention relates to a sealing arrangement for a high-pressure space having a bounding element and a termination element. The bounding element has an outer sealing surface and the termination element has an inner sealing surface. The outer sealing surface and the inner sealing surface are arranged such that a sealing-off of the high-pressure space is achieved via a contact of the two sealing surfaces. In accordance with the invention the bounding element is designed such that a force in the direction of the inner sealing surface can act on the outer sealing surface due to a pressure in the high-pressure space. Thereby a sealing function is also achieved then when the termination element deforms due to the pressure in the high-pressure space. The sealing arrangement in accordance with the invention can be used particularly advantageously in pumps.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: July 11, 2017
    Assignee: Sulzer Management AG
    Inventors: Paul Meuter, Thomas Welschinger
  • Patent number: 9695940
    Abstract: A circumferential shaft seal segment includes a radial outer face, a radially inner face, a first axial face extending from the radial outer face to the radial inner face and a second axial face axially spaced from the first axial face and extending from the radially outer face to the radially inner face. The seal has a bleed slot in the radially inner face extending from the first axial face toward the second axial face, and there are first and second recesses in the radially inner face in communication with the bleed slot that extend from circumferentially opposite sides of the bleed slot.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: July 4, 2017
    Assignee: KAYDON RING & SEAL, INC.
    Inventors: George Perry Haynes, Jared Daniel Manry
  • Patent number: 9551232
    Abstract: A non-contacting seal is provided, including a first sealing face formed on an end of a primary ring and a second sealing face formed on an end of a mating ring. Grooves may be formed in at least one of the first and second sealing faces, such that the grooves extend from one edge of the respective sealing face to an intermediate radius of the respective sealing face. At least one groove may include an entrance edge along the one edge of the respective sealing face and a dam wall opposite the entrance edge. The at least one groove may also include two symmetric side walls extending from the entrance edge to the dam wall. The two symmetric side walls may include a first convex curve extending from the entrance edge to a transition point and a second concave curve extending from the transition point to the dam wall.
    Type: Grant
    Filed: May 14, 2014
    Date of Patent: January 24, 2017
    Assignee: Dresser-Rand Company
    Inventor: Olivier Lebigre
  • Patent number: 9441650
    Abstract: A fluid resistance reducing method and a resistance reducing propulsion device are disclosed, wherein vane-shaped devices are inserted in the fluid at a certain interval along a vertical direction to a moving velocity direction of the fluid, and thus the fluid is divided into several limited zones to limit the fluid and solidify moving state; resultantly the fluid is prevented from directly crashing with fixed wall of a surface of an object to be resistance-reduced and thus a moving velocity direction of the vane-shaped device accords with a predetermined direction of a tangent line of the fixed wall and reaction force on the fluid provides a centripetal force for the fluid to turn, so as to force the fluid to gradually change the velocity direction along the fixed wall and manually intervene with parts of the object to force the fluid near a boundary face to moves stratifiedly and orderly.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: September 13, 2016
    Inventor: Lisong Zou
  • Patent number: 9405836
    Abstract: A continuous flow centrifuge system is provided. The system includes a rotor, a stator, a stator housing, upper and lower bearing plates, upper and lower bearings, first and second snap rings, and lip seal. The upper bearing rotatably secures a shaft of the rotor in the upper bearing plate. The first snap ring secures the upper bearing to the rotor shaft. The lip seal is over the upper bearing and forms a rotatable seal with the upper bearing plate. The second snap ring secures the lip seal to an inner diameter of the upper bearing plate. The upper and lower bearing plates are secured to the stator housing so that the rotor is operatively aligned with the stator.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: August 2, 2016
    Assignee: ALFA WASSERMANN, INC.
    Inventors: Kurt Spiegel, Sorin Weissman, Bill Lepse, Blaine J. Marsh
  • Patent number: 9303554
    Abstract: The power-assisted supercharger (10) includes: a turbocharger (12) in which a turbine (12a) is rotationally driven by exhaust gas (7) from an engine (40), a compressor (12b) rotationally driven by the turbine compresses intake air (5) and supplies the intake air to the engine; an electric motor (14) connected to a rotary shaft (12c) connecting the turbine and the compressor, the electric motor to add rotational force to the turbocharger; and a motor controller (20) to control a drive current (I) to the electric motor required for an assist operation for the turbocharger, by open loop, based on an accelerator opening degree (A) of the engine and a rotational speed (NE) of the engine. In this power-assisted supercharger, a turbo lag can be reduced by itself, power consumption can be small even in a range in which the rotational speed is high, malfunctions or unnecessary power consumption can be prevented, a control system can be simplified, and the installation space and the weight thereof can be small.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: April 5, 2016
    Assignee: IHI CORPORATION
    Inventors: Yuichiro Mizuno, Kazuhiko Shinagawa
  • Publication number: 20150132116
    Abstract: A hydrodynamic face seal ring for use in a rotary machine includes a support ring having at least two support ring segments and a radially-extending, first face. The support ring is configured to releasably couple to an inner surface of an outer casing of the rotary machine. The face seal ring also includes a sealing ring substantially concentric with the support ring. The sealing ring includes at least two sealing ring segments and a radially-extending, second face. The sealing ring is releasably coupled to the support ring such that the first face is mated against the second face.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 14, 2015
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Roderick Mark Lusted, Azam Mihir Thatte, Christopher David Suttles
  • Patent number: 9017018
    Abstract: An annular seal positionable in a gap is disclosed herein. The annular seal includes a plurality of leaves positioned about a center axis. Each leaf extends to a distal end that is elastically deflectable relative to the center axis to accommodate changes in a size of the gap. The annular seal also includes a ring encircling the center axis and at least partially interconnecting the plurality of leaves together for concurrent installation and removal. The annular seal also includes a plurality of tabs projecting from the ring along the center axis. Each of the tabs is directly connected to at least one of the plurality of leaves such that elastic deformation of one of the plurality of leaves induces bending in the corresponding tab before inducing bending in the ring.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: April 28, 2015
    Assignee: Rolls-Royce Corporation
    Inventor: Wade Alan Vest
  • 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
  • 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
  • Publication number: 20150078893
    Abstract: The present invention relates to a process for producing a seal arrangement (1) for a turbomachine which comprises a seal support (2) and a stripping lining (3) which is arranged on the seal support, wherein the seal support comprises a fiber-reinforced plastic and the stripping lining comprises polysiloxane, and wherein the seal support and the stripping lining are prepared in a non-cured state and are arranged in direct contact with one another in accordance with the configuration of the seal arrangement, and are subsequently subjected to a common curing process such that fiber-reinforced plastic and polysiloxane cross-link with one another. The present invention further relates to a correspondingly produced seal arrangement and to a turbomachine having such a seal arrangement.
    Type: Application
    Filed: September 19, 2014
    Publication date: March 19, 2015
    Inventors: Siegfried SCHMID, Michael SCHOBER, Siegfried SIKORSKI, Axel MATTSCHAS, Robert BADER
  • 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: 20140341733
    Abstract: A non-contacting seal is provided, including a first sealing face formed on an end of a primary ring and a second sealing face formed on an end of a mating ring. Grooves may be formed in at least one of the first and second sealing faces, such that the grooves extend from one edge of the respective sealing face to an intermediate radius of the respective sealing face. At least one groove may include an entrance edge along the one edge of the respective sealing face and a dam wall opposite the entrance edge. The at least one groove may also include two symmetric side walls extending from the entrance edge to the dam wall. The two symmetric side walls may include a first convex curve extending from the entrance edge to a transition point and a second concave curve extending from the transition point to the dam wall.
    Type: Application
    Filed: May 14, 2014
    Publication date: November 20, 2014
    Applicant: DRESSER-RAND SA
    Inventor: Olivier Lebigre
  • 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: 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
  • Publication number: 20140265146
    Abstract: A hydrodynamic mating ring includes a base and an insert coupled to the base. In embodiments, an insert has a coefficient of thermal expansion greater than the coefficient of thermal expansion of the base. A hydrodynamic seal assembly including a corresponding stator is also disclosed.
    Type: Application
    Filed: May 28, 2013
    Publication date: September 18, 2014
    Inventor: Adam Matthew Danaher
  • Patent number: 8820749
    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: Grant
    Filed: November 11, 2010
    Date of Patent: September 2, 2014
    Assignee: Garlock Sealing Technologies, LLC
    Inventors: Christopher E. Tones, Gregory Burnett, Kwongvoon Wong, Earl Rogalski
  • Patent number: 8807914
    Abstract: The present invention provides a seal device comprising a sealing passage which allows communication between a first space and a second space, and evacuation lines individually connected to the first space and the sealing passage. A gas feed line for feeding dry gas is connected to the sealing passage.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: August 19, 2014
    Assignee: Ebara Corporation
    Inventor: Hiroyuki Shinozaki
  • Patent number: 8800133
    Abstract: Gas turbine engine systems involving rotor bayonet coverplates and tools for installing such coverplates are provided. In this regard, a representative turbine assembly for a gas turbine engine includes: a turbine disk operative to mount a set of turbine blades; and a coverplate having an annular main body portion and a spaced annular arrangement of tabs extending radially inwardly from the main body portion with open-ended gaps being located between the tabs, the tabs being operative to secure an inner diameter of the coverplate to the turbine disk.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: August 12, 2014
    Assignee: United Technologies Corporation
    Inventors: Joseph T. Caprario, Daniel J. Griffin
  • Publication number: 20140205440
    Abstract: A seal assembly for rotary machine is provided. The seal assembly includes multiple compliant plates disposed between a stationary component and a rotary component of the rotary machine, and coupled circumferentially along the stationary component. Each compliant plate comprises a tip configured to be disposed facing the rotary component, and at least one plate slot extending from the stationary component towards the rotary component. The seal assembly also includes at least one annular resistance member configured to be coupled to the stationary component and disposed in the at least one plate slot in the compliant plates and one or more rotor slots or grooves located circumferentially on a surface of the rotary component proximate the tip of each of the plurality of compliant plates.
    Type: Application
    Filed: January 18, 2013
    Publication date: July 24, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Ajay Keshava Rao, Hrishikesh Vishvas Deo
  • Patent number: 8784045
    Abstract: A seal assembly including first and second components; a seal arranged between the first and second components to seal a secondary flow region from a primary flow region; and a second recess portion provided on a surface of the second component between the seal and the primary flow region, the second recess portion further being arranged to receive a first portion of a flow from the secondary flow region and being configured to promote a second flow feature within the second recess portion, wherein the second recess portion is set back from the surface of the second component such that a second portion of the flow from the secondary flow region bypasses the second recess portion.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: July 22, 2014
    Assignee: Rolls-Royce PLC
    Inventors: Tatjana Zoric, James D. Godwin
  • Patent number: 8777202
    Abstract: A tool is disclosed for adjusting a seal. The tool includes an engagement block. The engagement block defines a slot configured to capture a portion of the seal. The tool further includes an impact surface connected to the engagement block, and a hammer head movable along a strike axis with respect to the engagement block and configured for striking the impact surface. Striking of the impact surface with the hammer head can cause movement of the seal.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: July 15, 2014
    Assignee: General Electric Company
    Inventors: John William Herbold, Charles V. Spanos
  • Publication number: 20140191475
    Abstract: A seal for a turbomachine is disclosed. The seal assembly includes a rotatable shaft having a stepped outer circumferential surface that defines one or more annular protrusions axially-spaced thereon. A seal is radially-offset dially-offset from the rotatable shaft and has one or more annular recesses that extend radially-outward from the inner circumferential surface of the seal. A plurality of holes are defined in both the inner circumferential surface and the one or more annular recesses of the seal, the one or more annular recesses being axially-spaced from each other and configured to receive the one or more annular protrusions in an interlocking fit.
    Type: Application
    Filed: March 23, 2012
    Publication date: July 10, 2014
    Applicant: DRESSER-RAND COMPANY
    Inventors: Manoj K. Gupta, Steven Nove, Thomas Soulas, Krishnaswamy Ramesh, Glenn Grosso
  • Publication number: 20140183825
    Abstract: An assembly for a gas turbine engine includes a component and a finger seal. The component has a first surface and a second surface. The first surface has an elevation that differs from an elevation of the second surface. The finger seal is connected to the first surface and extends above the second surface. The disposition of the second surface relative to the finger seal creates a cavity below a curved portion of the finger seal.
    Type: Application
    Filed: December 29, 2012
    Publication date: July 3, 2014
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Conway Chuong, Matthew Budnick
  • Patent number: 8757047
    Abstract: A fluid control device for use in a high pressure fluid system, the device including a device body with a cavity and a high pressure circuit, a plunger positioned for reciprocal movement in the cavity, and a leakage reduction cap mounted to the plunger for reducing fluid leakage flow. In one implementation, the leakage reduction cap includes a flexible portion positioned between the device body and the plunger, and defining an annular clearance gap between the leakage reduction cap and the device body. The flexible portion of the leakage reduction cap resiliently flexes radially outwardly in response to fluid pressure forces to reduce the annular clearance gap so as to minimize fluid leakage flow through the annular clearance gap.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: June 24, 2014
    Assignee: Cummins Inc.
    Inventors: Donald J. Benson, David L. Buchanan, Scott R. Simmons
  • Publication number: 20140159317
    Abstract: There is disclosed a rotary air-riding seal between a first structure and an adjacent second structure, including: first and second seal members defining respective seal surfaces facing to one another. The first seal member is provided on the first structure and the second seal member is mounted to the second structure towards the first seal member. At least one of said seal members is configured to generate a riding film of air between said seal surfaces. One of said seal members is supported for axial oscillation relative to the other seal member by a secondary support arrangement configured to bias said seal member towards the other seal member. The said secondary support arrangement accommodates relatively high frequency axial movements between the seal members.
    Type: Application
    Filed: November 15, 2013
    Publication date: June 12, 2014
    Applicant: ROLLS-ROYCE PLC
    Inventor: Ingo Henry Johannes JAHN
  • Publication number: 20140044607
    Abstract: A seal device is provided for sealing intermediate spaces formed between bodies arranged to be relatively movable, wherein the seal device has a resilient, gas-tight main body which is extendable in a peripheral direction and through which a portion of the first of the two bodies is guided, and a first end portion, which fastenable to the second body, and a second end portion, which is settable against the first movable body, wherein the second end portion is movable with respect to the first end portion in a first transverse direction which extends at an angle different from 0┬░ with respect to a longitudinal direction. A sliding seal device, which is applicable to the first movable body so that a relative rotation is made possible between the first body and the second body by a pre-set angle, is arranged on the second end portion of the seal device.
    Type: Application
    Filed: July 31, 2013
    Publication date: February 13, 2014
    Applicant: KRONES AG
    Inventors: Florian Geltinger, Michael Neubauer
  • Publication number: 20140035231
    Abstract: A system includes an electrodynamically suspended seal. The electrodynamically suspended seal includes a first element that includes an electrically conducting material and a second element that includes a magnetic material. At least one of the first and second elements is configured to rotate about an axial axis. The first and second elements are disposed adjacent one another. The rotational movement of at least one of the first and second elements creates a levitation force such that the first and second elements are repelled away from one another. The electrodynamically suspended seal also includes a third element configured to create a counteracting force.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 6, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Anurag Singh, Nestor Hernandez Sanchez, James Michael Fogarty
  • Publication number: 20130285331
    Abstract: A controlled gap seal device is adapted to surround a shaft with an annular seal element. A ring is positioned on an outer surface of the seal element, the ring adapted to modify a diametrical dimension of the seal element by thermally expanding/contracting as a function of temperature variations. A housing assembly has an interior enclosing the seal element and the ring, with the seal configured to be generally stationary in the interior. The housing assembly has an air inlet and air outlet in fluid communication with a surrounding environment for directing a flow of gas from the surrounding environment onto the ring to controllably cool and shrink the ring. A method for modifying a diameter of a controlled gap seal relative to the shaft is also provided.
    Type: Application
    Filed: April 26, 2012
    Publication date: October 31, 2013
    Inventors: Richard A. KOSTKA, Dean CARPENTER, Tibor URAC, Adam LOGAN, Aaron GREY
  • Patent number: 8561997
    Abstract: An adverse pressure gradient seal mechanism for use with variable speed components. The adverse pressure gradient seal mechanism may include a number of labyrinth teeth positioned on a component and an adverse pressure gradient seal positioned between a pair of the labyrinth teeth. The adverse pressure gradient seal may include a number of strips with each of the strips having an angled end.
    Type: Grant
    Filed: January 5, 2010
    Date of Patent: October 22, 2013
    Assignee: General Electric Company
    Inventors: Anantha Padmanabhan Bhagavatheeswaran, Ravi Shankar Venkata Kasibhotla, Rohit Pruthi
  • Publication number: 20130234399
    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: Application
    Filed: March 15, 2013
    Publication date: September 12, 2013
    Inventor: John F. Justak
  • Publication number: 20130189085
    Abstract: The present invention relates to a seal arrangement for a turbomachine, in particular a gas turbine, having a plurality of rows, arranged in succession in the axial direction (A), of shells (1-3) connected to one another in the circumferential direction (U), wherein shells adjacent in the axial direction have cross sections opened counter to a throughflow direction (A) and/or a thread axis inclined counter to the throughflow direction.
    Type: Application
    Filed: January 22, 2013
    Publication date: July 25, 2013
    Applicant: MTU Aero Engines GmbH
    Inventor: MTU Aero Engines GmbH
  • Patent number: 8490982
    Abstract: The present invention relates to a windback device and method of use to prevent lubricant from leaking from a lubricant sump. More specifically, the present invention is comprised of a windback device within a lubricant sump formed from the coupling of an annular sump housing, an annular fluid seal assembly, and a bearing. The annular housing substantially surrounds the runner to form a chamber. The seal assembly is coupled to a sump housing both of which are adapted to receive a rotatable runner such that a sealed chamber is formed around the runner. A plurality of inclined threads extend along an inner face of the windback device and are angled such that lubricant or fluid splashed from the rotating shaft is redirected away from a shaft seal element of the annular fluid seal and through leak off slots leading to the sump housing chamber.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: July 23, 2013
    Assignee: Stein Seal Company
    Inventors: Brian Roche, Glenn Garrison, Hiren Patel, John Eppehimer, Manik Vasagar, Mark Sanville, Saji Pillai
  • Patent number: 8474827
    Abstract: In accordance with embodiments of this invention, a pressure actuated leaf seal assembly is provided that includes film riding, hydrodynamic/hydrostatic runners under seal member leaf ends. Leaf seal assemblies according to embodiments of this invention maintain the runner away from a rotating body until adequate rotating speed is present to generate lift required to allow the runner to float on a thin film of operating fluid on the rotating body, so that the runner does not rub the rotating body. In addition, runners are attached, or added, to leaf seal members such that the runners move in a radial direction, while remaining parallel to the rotating body. In one embodiment, a runner can comprise a separate structure coupled to a leaf seal member, and in another embodiment, a runner can comprise a wear-resistant pad on a distal end of a leaf seal member.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: July 2, 2013
    Assignee: CMG Tech, LLC
    Inventors: Clayton M. Grondahl, Richard Lee Smith, James Carlton Dudley
  • Publication number: 20130161911
    Abstract: The present relates to a seal for an energy recovery wheel. The seal comprises a main body defining an inner surface, and a pair of lateral walls extending from each lateral side of the main body. Each lateral wall respectively comprises a free edge defining a lip. The inner surface and lateral walls define a space therebetween. The seal provides for air travelling from one section of the energy recovery wheel to another to turbulate within the space. The inner surface is generally flat and the space may comprise a cavity. The lateral walls may be flexible or rigid. The present also relates to a combination of the seal with the energy recovery wheel.
    Type: Application
    Filed: December 17, 2012
    Publication date: June 27, 2013
    Applicant: INNERGY TECH INC.
    Inventor: INNERGY TECH INC.
  • Patent number: 8454023
    Abstract: The present application thus provides a retractable seal system for use between a high pressure side and a low pressure side of a turbine engine. The retractable seal system may include a seal positioned in a slot of a stationary component, a pressure balance pocket positioned about the seal, and a conduit in communication with the pressure balance pocket and the high pressure side.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: June 4, 2013
    Assignee: General Electric Company
    Inventors: Omprakash Samudrala, Siddarth Kumar, Gregory A. Crum, Karimulla Shaik Sha
  • Publication number: 20130106061
    Abstract: A hydrodynamic sealing system for use in an oxidizing environment includes a rotor and a sealing stator. The stator includes a solid lubricant or a surface treatment and the rotor is hardened or the stator is hardened and the rotor includes the solid lubricant or the surface treatment. The stator is located proximate to the rotor to provide a seal. The stator and the rotor are robust at extreme temperatures above 700 degrees Fahrenheit (F) such that at least one of the stator and the rotor have a wear rate and a surface roughness sufficient to maintain an operating gap between the stator and rotor.
    Type: Application
    Filed: October 28, 2011
    Publication date: May 2, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Eric RUGGIERO, Bala CORATTIYIL, Thomas Lowell STEEN
  • Patent number: 8413992
    Abstract: A shaft seal that is constituted by annularly arranging a plurality of seal segments in the circumferential direction of a rotating shaft, in which each seal segment has a plurality of thin plates that are provided in a predetermined arrangement in the circumferential direction of the rotating shaft, side plates that sandwich the plurality of thin plates from both sides thereof in the axial direction, and retention rings that retain the base ends of the plurality of thin plates and the base ends of the side plates; the distal ends of the thin plates protrude farther toward the rotating shaft than the distal ends of the side plates, and the protrusion length of the distal ends of the thin plates in the vicinity of the end portions in the circumferential direction where adjacent seal segments are connected is set to be less than the protrusion length of the distal ends of the thin plates that are located at the middle of the seal segment in the circumferential direction.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: April 9, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Takashi Nakano, Shin Nishimoto
  • Publication number: 20130034438
    Abstract: A sealing arrangement, for example for providing an intershaft seal between shafts of a gas turbine engine, includes an air-riding sealing ring disposed between runners. A buffer fluid, such as air, is conveyed to a buffer cavity through a passage in the sealing ring. The buffer air provides a positive pressure drop along fluid-riding gaps, preventing leakage across the sealing arrangement. The sealing ring may be a split carbon ring, and measures may be provided to minimise leakage of buffer air at the split.
    Type: Application
    Filed: June 28, 2012
    Publication date: February 7, 2013
    Applicant: ROLLS-ROYCE PLC
    Inventor: INGO H. J. JAHN
  • Patent number: 8356819
    Abstract: The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. Each additional groove is an axial bore groove extending perpendicularly to a longitudinal axis of the seal ring segment in fluid communication with the dead end circumferential groove so as to direct fluid flow generated from a rotating shaft into the dead end circumferential groove.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: January 22, 2013
    Assignee: Stein Seal Company
    Inventors: Thurai Manik Vasagar, Glenn M. Garrison, Diane R. McNickle
  • Patent number: 8342535
    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: November 19, 2008
    Date of Patent: January 1, 2013
    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: 8342534
    Abstract: The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. The additional groove(s) directs and creates pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. A bleed hole may also be provided to create a seal between each sealing segment.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: January 1, 2013
    Assignee: Stein Seal Company
    Inventors: Thurai Manik Vasagar, Glenn M. Garrison, Alan D. McNickle, Diane R. McNickle, legal representative
  • Publication number: 20120315138
    Abstract: A seal assembly for a turbo machine is provided. The turbo machine includes a rotary component and a stationary component. The seal assembly is disposed between the rotary component and the stationary component. The seal assembly is configured to provide a sealing between a high pressure area and a low pressure area of the turbo machine. The seal assembly includes a plurality of compliant plates coupled circumferentially along the stationary component. Each of the compliant plate includes a tip disposed facing the rotary component. A tip slot is provided on the tip of the compliant plates, wherein the tip slots is provided at the portion of the tip proximate the high pressure area. The compliant plates further include a plate slot extending from the stationary component towards the tip. An annular resistance member coupled to the stationary component is disposed in the plate slot in the compliant plates.
    Type: Application
    Filed: June 10, 2011
    Publication date: December 13, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Ajay Keshava Rao, Hrishikesh Vishvas Deo
  • Publication number: 20120280458
    Abstract: A hydrodynamic non-contacting seal wherein the sealing surface of a rotatable sealing member is grooved in a spiral pattern such that the depth of the grooves decreases in a direction opposite to the direction of rotation of the rotatable sealing member.
    Type: Application
    Filed: May 4, 2011
    Publication date: November 8, 2012
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Antonio F. Artiles, Ethan K. Stearns
  • Publication number: 20120261884
    Abstract: There is provided a shaft seal device comprising a seal piece-laminated body (12) where a plurality of thin seal pieces (20) are laminated in the circumferential direction along a rotating shaft, outer ends of the plurality of thin seal pieces in the radial direction are connected to each other, inner ends (20b) of the thin seal pieces in the radial direction are formed as free ends, a small gap (s) is formed at every two thin seal pieces adjacent to each other, and a small gap (s) is formed between the rotating shaft and the seal piece-laminated body (12). A wear-resistant treatment layer (25) is formed on the surface of a portion of the thin seal piece close to the inner end.
    Type: Application
    Filed: January 28, 2011
    Publication date: October 18, 2012
    Inventors: Hidekazu Uehara, Tanehiro Shinohara, Takashi Nakano, Shin Nishimoto
  • Publication number: 20120223483
    Abstract: The present application provides an aerodynamic seal assembly for use with a turbo-machine. The aerodynamic seal assembly may include a number of springs, a shoe connected to the springs, and a secondary seal positioned about the springs and the shoe.
    Type: Application
    Filed: March 4, 2011
    Publication date: September 6, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Rahul Anil Bidkar, Christopher Wolfe, Biao Fang