Segmented Ring Patents (Class 277/543)
  • Patent number: 9829157
    Abstract: A machine for making and dispensing liquid and/or semi-liquid food products includes a tank for containing the product, and a dispensing tap mounted on the discharging outlet of the tank. The tap has a duct connected to the discharging outlet and a piston sliding in a sealed fashion inside the duct. The duct has a first stretch extending between a first end and a branch of the duct from which a dispensing outlet of the tap extends, and a second stretch extending between the branch of the duct and a second end of the duct. The first end is connected in a sealed fashion to the discharging outlet and the second end is closed by a plug The piston is movable between a position preventing the dispensing of the product and allowing the washing of the duct, and a position allowing dispensing of the product.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: November 28, 2017
    Assignee: ALI S.P.A.—CARPIGIANI GROUP
    Inventors: Andrea Cocchi, Roberto Lazzarini
  • Patent number: 9670935
    Abstract: Embodiments of the present disclosure are directed towards a seal assembly including a first seal and a second seal, wherein the first seal and the second seal axially abut one another within a retaining bore of a compressor, and cooperatively form an outer radial contour of the seal assembly that is retained by the retaining bore.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: June 6, 2017
    Assignee: Ingersoll-Rand Company
    Inventors: Thomas Edward Gerber, Johnathon David Clemons
  • Patent number: 9377109
    Abstract: A seal structure of a rotary machine is such that: an outer circumference side member has a ring-shaped flange which projects radially inward and extends about the axis; an inner circumference side member has a flange which is of a ring shape projecting radially outward and extending about the axis, and which is opposite to the flange of the outer circumference side member from the axial direction; in either flange, there is formed a ring-shaped groove part which is recessed from the end surface facing the other flange; in the groove part, a ring-shaped seal body advances and retracts to come in contact with the other flange; and there is a first biasing device biasing body toward the other flange side, and a second biasing device biasing it toward the wall surface of the groove part.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: June 28, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Eiichi Tsutsumi, Kenichi Arase
  • Patent number: 9309975
    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: Grant
    Filed: April 26, 2012
    Date of Patent: April 12, 2016
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Richard A. Kostka, Dean Carpenter, Tibor Urac, Adam Logan, Aaron Grey
  • 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: 9004491
    Abstract: An illustrative embodiment of a multi-shaft seal assembly generally includes a first seal, a second seal, and a collar. In the illustrative embodiment the collar may be integrally formed with a portion of the first seal, and may serve to axially space the second seal from the first seal. The second seal may be formed with a cutaway therein to ensure proper clearance between the second seal and one of the shafts. Other embodiments of the multi-shaft seal assembly use a collar formed with the equipment housing or second seal. Still other embodiments include additional seals for additional shafts.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: April 14, 2015
    Assignee: Inpro/Seal LLC
    Inventors: David C. Orlowski, Neil F. Hoehle, Robert A. Tejano, Morgan Pullias
  • Patent number: 8905407
    Abstract: A segment of a seal assembly for sealing against a rotating member is disclosed. The segment includes a radial external surface, a radial internal surface for sealing against said rotating member, a face groove, and a secondary sealing surface. In embodiments, the segment may include a radial feed groove, and the face groove has an axial depth from the surface of the secondary sealing surface that is greater than the axial depth of the radial feed groove. Additionally, in embodiments, the face groove may include a relief groove, the face groove has a radial length at the axial position of the secondary sealing surface, the relief groove is axially offset from the secondary sealing surface, and the relief groove includes a portion with a radial length greater than the radial length of the face groove at the axial position of the secondary sealing surface.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: December 9, 2014
    Assignee: Eaton Corporation
    Inventors: Edward N. Ruggeri, Gerald M. Berard
  • Patent number: 8827637
    Abstract: A seal arrangement for a gas turbine engine comprises a seal support having a hub portion and a peripheral rim portion. A seal member is mounted to a radially inner surface of the hub portion. A first set of circumferentially spaced-apart channel segments project from the peripheral rim portion of the seal support. A second set of circumferentially spaced-apart channel segments projects from a mating stationary structure of the gas turbine engine. The first and second sets of circumferentially spaced-apart channel segments circumferentially may be aligned to complementary form a circumferentially extending channel. A retaining ring may be mounted in the circumferentially extending channel for retaining the seal support on the mating stationary structure of the engine. The seal support may be provided with a diaphragm to provide flexibly between the seal member and the point of attachment of the seal support to the mating structure of the engine.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: September 9, 2014
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Richard Ivakitch, Andreas Eleftheriou
  • Publication number: 20140186152
    Abstract: A blade outer air seal system for a gas turbine engine includes a plurality of ring carriers made of a first material having a first coefficient of thermal expansion. A plurality of seal segments are carried, respectively, on the plurality of ring carriers. A ring member is carried in the plurality of ring carriers. The ring member is made of a second material that is different from the first material in composition. The second material has a second coefficient of thermal expansion such that the first coefficient of thermal expansion is 75-175% of the second coefficient of thermal expansion.
    Type: Application
    Filed: December 27, 2012
    Publication date: July 3, 2014
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Michael G. McCaffrey, Brandon T. Rouse, Thomas Almy, Igor S. Garcia, John R. Farris, Mark Borja
  • Publication number: 20140154053
    Abstract: A carbon seal assembly comprises an annular member adapted to be secured to a structure. An annular seal runner is sealingly mounted to a shaft to rotate therewith, with the seal runner being made of a material complementary to that of the annular member for magnetic attraction therebetween. An annular carbon seal element is mounted to the annular seal runner to rotate therewith and positioned in a gap between the annular member and the annular seal runner, the annular carbon seal element having an annular wear surface abutting against a face of the annular member. A cross-sectional area of the annular carbon seal element increases as the axial dimension of the annular seal runner decreases for at least a part of the seal.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 5, 2014
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventor: Ivor John Roberts
  • Publication number: 20140023490
    Abstract: A fastener is provided for connecting two or more structural elements having matching apertures which, when aligned, form a frusto-conical cavity. The fastener includes a body portion having a frusto-conical outer surface which is receivable in the aligned apertures of the structural elements such that the outer surface of the body portion is in mating engagement with the cavity formed by the aligned apertures. The fastener further includes an elongate member which extends from the body portion at the narrow end of the frusto-conical outer surface. The fastener further includes a fixing element carried by the elongate member. The fixing element is operable to exert a clamping force between the frusto-conical outer surface and the fixing element to retain the structural elements in connection therebetween. The fastener further includes a through-hole which extends along the elongate member and which allows fluid communication between opposing sides of the connected structural elements.
    Type: Application
    Filed: July 18, 2013
    Publication date: January 23, 2014
    Inventor: Steven HILLIER
  • Patent number: 8479524
    Abstract: A combustion chamber arrangement is described for operating a gas turbine, with a combustion chamber wall which encloses the combustion chamber space and in the region of the combustion chamber outlet encloses a flow passage for hot gases which develop inside the combustion chamber, has a combustion chamber wall edge which freely terminates in the axial flow direction of the hot gases. The combustion chamber wall edge is formed with a profile which blocks or at least inhibits a diffuser effect when a cooling air flow, which is guided axially through the flow passages into the annular spatial area, flows over the combustion chamber wall edge.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: July 9, 2013
    Assignee: Alstom Technology Ltd.
    Inventors: Madhavan Narasimhan Poyyapakkam, Fulvio Magni, Nadir Ince
  • Publication number: 20130022459
    Abstract: A seal assembly for a rotary machine is provided. The seal assembly includes multiple sealing device segments disposed intermediate to a stationary housing and a rotor. Each of the segments includes at least one plate and a sealing element. The seal assembly also includes multiple inter-segment gaps formed between the multiple sealing device segments. Further, for each pair of adjacent sealing device segments, at least one pair of adjacent plates includes one plate overlapping another plate at an inter-segment gap.
    Type: Application
    Filed: July 18, 2011
    Publication date: January 24, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Omprakash Samudrala, Christopher Edward Wolfe, Raymond Edward Chupp
  • Publication number: 20130001886
    Abstract: A seal assembly for a turbomachine is provided. The seal assembly includes multiple arcuate packing ring segments disposed intermediate to a stationary housing and a rotatable element about an axis. The seal assembly further includes multiple flexures mechanically coupled to the stationary housing and the multiple arcuate packing ring segments, wherein the multiple flexures are attached to the stationary housing and the arcuate packing ring segments at positions predetermined to control packing ring twist under differential pressure conditions.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 3, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Binayak Roy, Hrishikesh Vishvas Deo, Xiaoqing Zheng
  • Publication number: 20120261887
    Abstract: A segmented intershaft seal assembly for counter-rotating and co-rotating turbine engines is described. The assembly includes a pair of end rings, an annular seal element, and at least one resilient element. At least one end ring has a flange that extends from one side thereof. The flange has a lower annular surface. The seal element includes at least two seal segments. Each seal segment includes a ring segment and a ring flange segment. The ring segment has an upper radial surface. The ring flange segment directly contacts and extends from the upper radial surface forming either a substantially “T”-shaped or “L”-shaped cross section. The seal segments are disposed between the end rings. At least one resilient element biases each seal segment away from the inner shaft so that the upper radial surface contacts the lower annular surface and a portion of the ring flange segment extends beyond the flanges.
    Type: Application
    Filed: June 19, 2012
    Publication date: October 18, 2012
    Applicant: Stein Seal Company
    Inventor: Thurai Manik Vasagar
  • Patent number: 8251372
    Abstract: A cartridge for mounting around a movable shaft is provided. According to one exemplary embodiment, the cartridge features a cartridge housing, first and second rings having respective radial inner peripheries for establishing interfaces with a movable shaft, first and second pressure plates situated in the cartridge housing between the first and second rings, and a biasing member urging the first and second pressure plates towards the first and second rings, respectively. According to a second exemplary embodiment, the cartridge features a cartridge housing, a ring having a radial inner periphery for establishing an interface with a movable shaft, a pressure plate situated in the cartridge housing between the protruding portion and the ring, and a biasing member urging the pressure plate towards the ring. The cartridges of both embodiments may be designed to permit removal of the ring(s) from the cartridge housing without requiring removal of either the pressure plate (s) or the biasing member(s).
    Type: Grant
    Filed: May 8, 2009
    Date of Patent: August 28, 2012
    Assignee: Delaware Capital Formation, Inc.
    Inventor: Michael H. Wood
  • Patent number: 8100403
    Abstract: A seal and seal assembly for providing a seal between an outer shaft and an inner shaft. The assembly includes a seal subassembly disposed between the shafts. The subassembly includes a split carbon ring, a solid outer ring, and a spring mechanism provided between the split carbon ring and the solid outer ring. The carbon ring is radially split into a plurality of segments having splits between ends of adjacent segments. The segments include a circumferential inner radius and a sealing dam on the circumferential inner radius. The solid outer ring includes a sealing face and a plurality of hydrodynamic grooves provided on a radial face. The spring mechanism may be configured to engage a portion of an outer diameter of the split carbon ring and a portion of an inner diameter of the solid outer ring and to urge the split carbon ring radially towards the inner shaft.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: January 24, 2012
    Assignee: Eaton Corporation
    Inventor: John F. Short
  • Publication number: 20120003391
    Abstract: The invention relates to a sealing system for a melt dip coating apparatus for coating a metal strip with a metal melt (200). The melt dip coating apparatus comprises a roller dipping into the metal melt for deflecting or stabilizing the metal strip as the latter passes through the metal melt (200), the roller having a roller body and a roller journal (224) and an airlock which surrounds the roller journal (224) with an airlock chamber (232), and a means for feeding the gaseous medium with a gas pressure into the airlock chamber (232) in order to seal off the airlock chamber (232) with respect to the metal melt (200).
    Type: Application
    Filed: July 19, 2010
    Publication date: January 5, 2012
    Applicant: SMS SIEMAG AKTIENGESELLSCHAFT
    Inventors: Peter De Kock, Ronald Norman Jabs
  • Publication number: 20110163506
    Abstract: A seal plate assembly for use with a rotor wheel assembly of a turbine engine. The seal plate assembly may include a seal plate positioned about a rim of a rotor wheel. The seal plate may include a number of seal plate segments and a number of locking pins extending through the seal plate segments and into the rim of the rotor wheel.
    Type: Application
    Filed: January 5, 2010
    Publication date: July 7, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Matthew Troy Hafner
  • Publication number: 20110135445
    Abstract: A pressure balance seal includes a sealing surface facing an inward radial direction, and a stator interface comprising at least one surface interfacing with a stator. The pressure balance seal further includes a friction reducing feature. The friction reducing feature includes a cavity on the sealing surface. The cavity is configured to receive a fluid such that a normal force acting on the pressure balance seal is counterbalanced by a force generated by a pressure of the fluid.
    Type: Application
    Filed: December 4, 2009
    Publication date: June 9, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Norman Arnold Turnquist, Keith Michael Parker, Xiaoqing Zheng, Rodrigo Rodriguez Erdmenger, Robbert Christiaan Pannekeet, Alexander Kimberley Simpson, Biao Fang
  • Patent number: 7914007
    Abstract: A segment of a seal assembly for sealing a higher pressure area against a rotating member is disclosed. The segment may include a radial external surface, a radial internal surface for sealing against a rotating member, a feed cavity, a ramp portion in communication with the feed cavity, a segment trough in communication with the ramp portion, one or more hydrodynamically-configured pads including an entrance; and a sealing dam disposed between the lift pad and the radial internal surface. The ramp portion may be configured to pick up air flow with an increase in velocity from the rotating member, and the trough or a flow-control portion may be configured to prevent fluid from flowing around or circumventing the pad entrance to, at least in part, provide a dynamic feed.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: March 29, 2011
    Assignee: Eaton Corporation
    Inventors: Gerald M. Berard, Edward N. Ruggeri
  • Publication number: 20100247309
    Abstract: A lamellar seal for sealing a shaft which rotates around an axis, especially in a gas turbine, includes a multiplicity of lamella (13) which are spaced one beneath the other, arranged in a concentric circle around the axis, and fixed in their position, wherein the lamellae (13) by their surfaces are oriented essentially parallel to the axis. The lamellar seal is improved by the fact that the lamellae (13) have formed-on structures (19, 20, 21) in each case for positioning and retaining the lamellae (13) in the lamellar seal (12), which include one or more laterally projecting support arms (19, 20, 21) which engage in complementarily formed recesses (25, 26) of the end plates (15, 16).
    Type: Application
    Filed: March 26, 2010
    Publication date: September 30, 2010
    Inventors: Günter Ambrosy, Matthias Höbel, Ernst Vogt, Josef Hafner
  • Publication number: 20100201076
    Abstract: A segmented packing ring 20 includes a number of first sealing segments 21, a number of second sealing segments 22, and a number of support segments 23, the support segments 23 and the second sealing segments 22 being arranged in an alternating successively abutting manner in the circumferential direction, and the first sealing segments 21 being arranged in a manner axially abutting the second sealing segments 22 and the support segments 23, and including a nose 24 extending axially on the second sealing segments 22, which is arranged in the circumferential direction between two adjacent first sealing segments 21.
    Type: Application
    Filed: January 28, 2010
    Publication date: August 12, 2010
    Inventors: Christian Hold, Tino Lindner-Silwester, Alexander Jandl
  • Patent number: 7766340
    Abstract: Rings described herein can be installed in a stuffing box assembly about a rotary element without the need for dismantling the apparatus. A system can comprise at least two rings. Each ring can have a first section and a second section. The first section of the ring has an outer rounded edge, a first mating edge, an inner rounded edge, and a second mating edge. The second section has an outer rounded edge, a first mating edge for abutting the first mating edge of the first section to form a joint, an inner rounded edge, and a second mating edge for abutting the second mating edge of the second section to form a joint. The outer rounded edges of the first and second sections comprise the circumference of the outer edge of the ring when the first and second sections are mated. Each ring can be positioned on top of another ring to align the outer edges of the rings.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: August 3, 2010
    Assignee: Garlock Sealing Technologies LLC
    Inventor: James W. Suggs, III
  • Patent number: 7726940
    Abstract: Assembly of segmented seals can be problematic in areas of limited space for an introductory tapered mandrel and where there are the problems with damage to the seal surfaces 23, 24. By the present method and arrangement, a seal formed from segments 22 is expanded to an expanded state and then retained at that state by the use of a sacrificial material 26 in the gaps 25 between the segments 22 opened by expansion. The sacrificial material 26 is typically a low melting temperature wax and so is removed when the seal arrangement reaches its operating temperature.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: June 1, 2010
    Assignee: Rolls-Royce PLC
    Inventor: Guy David Snowsill
  • Patent number: 7717433
    Abstract: A dynamic seal assembly for a rotating member comprising a first split housing carrying a first split seal, a second split housing carrying at least one second split seal, each split seal being resiliently closed so that sealing contact is maintained when the rotating member wobbles. The free ends of the second split seal overlap with one another in either a side-by-side relationship or an over-under relationship, or both.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: May 18, 2010
    Assignee: Equistar Chemicals, LP
    Inventors: James E. Taylor, Milton R. Hertel
  • Patent number: 7631879
    Abstract: Disclosed herein is a seal assembly for a rotary machine having a plurality of arcuate segments and at least one seal. The plurality of arcuate segments are arrayed in an annulus and have butt joints, each of the arcuate segments has a radially outermost surface and a downstream face. The at least one seal is arranged to minimize leakage through the butt joints. The at least one seal has a first portion configured to minimize leakage at the radially outermost surface and a second portion configured to minimize leakage at the downstream face.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: December 15, 2009
    Assignee: General Electric Company
    Inventor: Gregory L. Diantonio
  • Patent number: 7543822
    Abstract: A composite seal assembly for providing a seal between a rotating shaft and a static surface. The composite seal assembly includes first and second axially adjacent annular seal elements. The first and second seal elements each include a sealing edge contacting the shaft to provide a respective seal between the first and second seal element and the shaft. A static housing receives the first and second seal elements and engages the static surface to provide a static stationary seal, while concomitantly providing a flex region that engages the seal elements to form a dynamic seal therewith.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: June 9, 2009
    Assignee: A.W. Chesterton Company
    Inventors: Michael P. Grimanis, Joseph K. Kaleshian
  • Patent number: 7540501
    Abstract: A segmented shaft seal is provided for circumferentially sealing an outer surface of a rotating shaft unit. The shaft seal includes a plurality of seal ring segments disposed within a housing having a circumferential spring holding the ring segments together. The ring segments further have lift grooves defined on the circumferential inner surfaces thereof to generate a radially outwardly directed lift force acting against the inwardly directed spring force. The lift grooves have a tapered profile radially and/or circumferentially to facilitate formation of the outwardly directed lift force as well as molding of the ring segments.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: June 2, 2009
    Assignee: Flowserve Management Company
    Inventor: Andrew L. Flaherty
  • Publication number: 20090026713
    Abstract: It is an object of the present invention to provide a sealing apparatus having high sealing performance, entailing a low cost, and satisfactory in assembly characteristics. The sealing apparatus is a differential pressure-responsive sealing apparatus which is inserted between seal grooves formed in the side surfaces of outlet flange portions of adjacent combustor transition pipes to seal clearance between the side surfaces, comprising: a minimum required number of seal pieces connected in the longitudinal direction for imparting flexibility, the seal piece comprising a heat resistant, wear resistant material, and having a pair of sealing ridges each having an arcuate surface contacting the wall surface of each seal groove.
    Type: Application
    Filed: August 13, 2008
    Publication date: January 29, 2009
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kiyoshi FUJIMOTO, Hiroaki KISHIDA, Kuniaki AOYAMA
  • Publication number: 20090020959
    Abstract: The invention relates to a segmented packing ring for sealed packages, comprising at least two annular segments (1), which, in the assembled state, are held together in the circumferential direction by means of springs (3). According to the invention, the assembly may be simplified and relatively small springs used as protection against damage as a result of spring breakages, whereby, at each contact point (2) of adjacent annular segments (1), at least one separate tension spring (3) is arranged between anchor elements (5) provided on both ends in the region of the ends (4) of the annular segments (1) and the fixing of the tension springs (3) to the anchor elements (5) has a preferably clip or locking mechanism for single-person operation.
    Type: Application
    Filed: April 13, 2006
    Publication date: January 22, 2009
    Inventors: Bill Shaw, David Ivone, Mark Wardle, Jaeseok Lee
  • Patent number: 7017916
    Abstract: A system and method of manufacturing improved wear ring assemblies and positive pressure shaft seals. The wear ring assemblies are made from stacked layers of flat metal. Different shaped component parts of the wear ring assemblies are cut from various sheets of metal. The component parts are stacked to form different sections of the wear ring assemblies. The stacked component parts are welded or otherwise bound together. The resulting sections of the wear ring assemblies are then assembled to form the annular structure of a full wear ring assembly. The result is a wear ring assembly that is both easy and inexpensive to produce.
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: March 28, 2006
    Inventor: David Sayers
  • Patent number: 6871858
    Abstract: A shaft sealing apparatus is provided which can easily be assembled and arranged to prevent leakage of a dope from an acetylator or the like system. A screw sleeve having a spiral groove provided in the outer side thereof is mounted on rotary shaft adjacent to a location where the rotary shaft extends through a housing. As the screw sleeve rotates together with the rotary shaft, it can return back the dope into the housing thus providing a sealing effect. The screw sleeve includes six segments fabricated by separating circumferentially into two and axially into three. The six segments are jointed together to assemble a generally cylindrical structure on the rotary shaft. The assembling process can be conducted from two radial directions on the rotary shaft between the housing and each bearing unit supporting the rotary shaft without disassembling the bearing units.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: March 29, 2005
    Assignee: Daicel Chemical Industries, Ltd.
    Inventor: Masanori Futai
  • Patent number: 6637753
    Abstract: In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a supplemental seal is disposed between the support ring and inner rail of each nozzle segment radially inwardly of the chordal hinge seal. To minimize or prevent leakage flow across the chordal hinge seal, the seal is formed of flexible sheet metal which extends between the inner rail and a seat projecting from the annular sealing surface of the support ring radially inwardly of the chordal hinge seal. A first margin of the flexible seal engages in an arcuate groove carried by the inner rail. The opposite margin extends arcuately in sealing engagement along the seat carried by the nozzle support ring.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: October 28, 2003
    Assignee: General Electric Company
    Inventors: Abdul-Azeez Mohammed-Fakir, Ahmad Safi, Iain Robertson Kellock, Gary Michael Itzel, Brian Peter Arness
  • Patent number: 6637751
    Abstract: In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a supplemental seal is disposed between the support ring and inner band of the nozzle segment on a high pressure side of the chordal hinge seal. The supplemental seal includes a pair of sheet metal shims overlaid by a woven metallic cloth supported by a bracket secured to the inner margin of the inner rail. The radially inner end of the cloth seal bears against the annular sealing surface of the nozzle support ring. The shims of the legs of the supplemental seal are slit along their distal margin and staggered circumferentially relative to one another to provide flexibility and effective sealing engagement with the nozzle support ring.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: October 28, 2003
    Assignee: General Electric Company
    Inventors: Mahmut Faruk Aksit, Ahmad Safi, Abdul-Azeez Mohammed-Fakir
  • Patent number: 6585271
    Abstract: A seal assembly and method according to which a plurality of seal members are provided, each of which is formed by a strip of material having two interlocking portions. One of the interlocking portion of each seal member interlocks with one interlocking portion of another seal member, and the other interlocking portion of the each seal member interlocks with one interlocking portion of another seal member.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: July 1, 2003
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Patrick N. Divan
  • Patent number: 6585270
    Abstract: A seal is provided at the intersegments of hydrogen seal rings for preventing oil leakage through this potential gap between the seal ring segments. By minimizing leakage through the gaps between the open rings, hydrogen consumption in hydrogen-cooled generators due to leakage oil is reduced. In a preferred embodiment, the seal is provided by a brush seal secured to one of the seal ring segments and received in a slot defined in the other of the seal ring segments.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: July 1, 2003
    Assignee: General Electric Company
    Inventor: Wei Tong
  • Publication number: 20030102633
    Abstract: A seal ring is provided, which is capable of maintaining a stable sealing performance for a long period, in which a cut portion S is provided at one position in a circumferential direction of a seal ring 1, a convex portion 41 is provided at a first cut end portion 4, a recess portion 51 is provided at a second cut end portion, and the end portions of a third surface 41c and a sixteenth surface 51c extending in the circumferential direction among the convex portion 41 and recess portion 51 correspond to a portion of a second seal portion 2 for sealing a side wall surface 81a of an annular groove 81.
    Type: Application
    Filed: October 22, 2002
    Publication date: June 5, 2003
    Inventor: Tadashi Abiko
  • Patent number: 6431550
    Abstract: A seal is provided at the intersegments of hydrogen seal rings for preventing oil leakage through this potential gap between the seal ring segments. By minimizing leakage through the gaps between the open rings, hydrogen consumption in hydrogen-cooled generators due to leakage oil is reduced. In a preferred embodiment, the seal is provided by a brush seal secured to one of the seal ring segments and received in a slot defined in the other of the seal ring segments.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: August 13, 2002
    Assignee: General Electric Company
    Inventor: Wei Tong
  • Patent number: 6145843
    Abstract: This invention discloses a completely different hydrodynamic gas seal configuration from both the Rayleigh bearing and other prior art. Instead of the shallow, wide, and short single pocket geometry for the Rayleigh bearing, and instead of the multiple depth grooves of the other prior art teachings, the hydrodynamic seal in this invention has a sealing face with lift pockets therein that are deep (normally in the range of about 0.010 inches to about 0.025 inches deep), narrow, long, multiple, coextensive, parallel, and single-depth. This invention incorporates the same basic hydraulic principle of generating pressure rise by the shearing gradient between the rotating shaft and stationary carbon elements, and therefore produces a force which is opposite in direction to the rubbing force generated by the ambient pressure drop across the seal. In this invention the forces are more evenly balanced across the axial face of the seal ring segments, thereby accommodating any conicity of the shaft race.
    Type: Grant
    Filed: October 19, 1998
    Date of Patent: November 14, 2000
    Assignee: Stein Seal Company
    Inventor: Mingfong Hwang
  • Patent number: 5997247
    Abstract: This seal (6) running between gaps (6) between two stator sectors of a gas urbine engine is made up of several thin flexible slabs, capable of sliding one over the other, which gives a better seal.
    Type: Grant
    Filed: January 14, 1998
    Date of Patent: December 7, 1999
    Assignee: Societe Nationale Detude et de Construction de Mothers d'aviation "Snecma"
    Inventors: Anne-Marie Arraitz, Eric Stephan Bil, Michel Gerard Paul Hacault, Laurent Philippe Yves Leray, Marc Roger Marchi, Didier Marie Mortgat
  • Patent number: 5997003
    Abstract: Methods and apparatus are described for improved sealing across an annular space between facing sealing surfaces. Methods for mechanically setting and pressure energizing sealing ring assemblies are also described. In one aspect, several sealing ring assemblies are described, each of which include an outer seal body formed of elastically deformable metal and having an annular base with a pair of legs extending from the base to form a channel. A plurality of predominately non-deformable segments are positioned between the legs. The use of segments substantially reduces detrimental hoop stress which would hinder effective setting of a seal between the inner and outer members. In preferred embodiments, the legs and the segments each present raised portions which are offset from each other. The offset arrangement of the raised portions permit the ring assembly to be mechanically set by radial spring loading through elastic deformation of portions of the seal body.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: December 7, 1999
    Assignee: Cooper Cameron Corporation
    Inventor: Edwin C Turner