Motor Shaft Patents (Class 415/107)
  • Patent number: 9840873
    Abstract: The disclosure of this application is directed to a downhole tool comprising a central element/member and a sleeve that is rotatably and orbitally disposed around the central element/member. The sleeve rotates and orbits around the central element/member responsive to fluid flowing through the downhole too. The disclosure is also related to a method of advancing the downhole tool in a well by flowing fluid through the tool.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: December 12, 2017
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Roger Schultz, Brock Watson, Andy Ferguson
  • Patent number: 9441607
    Abstract: In one embodiment, a marine current power generation device has rotary blades, rotating shaft, power generator, guide bearings, thrust collars and thrust bearings. The guide bearing has a second slide surface being slidable relative to the first slide surface of the rotating shaft. The thrust bearing has a fourth slide surface being slidable relative to the third slide surface of the rotary plate of the thrust collar. The materials of the first and third slide surfaces include ferrous materials, stainless materials, Ti, Ti alloy, Co, or Co alloy. The materials of the second and fourth slide surfaces include a resin material filled with a first fibrous member and a second fibrous member. The second fibrous member is smaller than the first fibrous member.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: September 13, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Than Trong Long, Tatsuo Yamashita, Yasuo Kabata
  • Patent number: 9039349
    Abstract: A turbocompressor for use with a process fluid and including an axial expansion turbine for expanding the process fluid and a centrifugal compressor for compressing the process fluid. The turbine and compressor share a common shaft, all of which can be housed by a common housing that encloses sealed spaces. The axial expansion turbine has a rotor located between two main bearings, and the centrifugal compressor includes an impeller mounted to one end of the shaft. In one embodiment, the main bearings are lubricated by a portion of the process fluid so that the only fluid in the sealed spaces is the process fluid. The turbocompressor can be used in a power-cycle system that includes a heat source and, optionally, an electrical generator.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: May 26, 2015
    Assignee: Concepts ETI, Inc.
    Inventors: Elia P. Demetri, Oleg Dubitsky, Louis Larosiliere, Robert Pelton, Karl Wygant
  • Publication number: 20150141188
    Abstract: Disclosed are embodiments of thrust absorbing planetary traction drives that utilize roller-shaft traction interfaces that are slanted to absorb thrust created on a turbo shaft by a turbine or compressor. Slanted traction surfaces on the sun portion of the turbo shaft are slanted inwardly so that the turbo shaft remains centered in the planetary traction drive. Either double roller planets or single roller planets can be used to absorb thrust in the axial direction of the turbo shaft. Various curved and slanted surfaces can be utilized to create traction interfaces that hold and stabilize the turbo shaft both axially and radially.
    Type: Application
    Filed: October 10, 2014
    Publication date: May 21, 2015
    Inventors: Ryan Sherrill, Sterling Holman, Jared William Brown
  • Publication number: 20150037138
    Abstract: A thrust shaft contains a shaft body having a disk at one axial end to provide a rotating surface in a thrust bearing, the disk having a first side and an opposite second side. The thrust shaft also contains a first section extending from the first side of the disk, the first section cylindrical in shape and having eleven holes uniformly spaced circumferentially about the first section, the holes being substantially axially equidistant from the first side of the disk. The thrust shaft also contains a second section cylindrical in shape having a smaller diameter than the first section, the second section extending from the first section to an end of the shaft remote from the disk.
    Type: Application
    Filed: July 30, 2013
    Publication date: February 5, 2015
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Craig M. Beers, Murtuza Lokhandwalla, John M. Beck
  • Patent number: 8911201
    Abstract: The invention concerns a turbine for the expansion of gas and vapor, comprising a body or case, a fixed external sleeve member, overhanging frontally from a frontal wall of said case, and a turbine shaft (15) extending coaxially and rotating in said external sleeve member (18) with the interposition of a supporting unit (19). The external sleeve member has a head flange to axially hold said supporting unit; the turbine shaft ends with a joint to connect it to a device to be operated. The supporting unit (19) includes ball bearings to support the turbine shaft (15) in said external sleeve member (18), and between said external sleeve member (18) and a contiguous end of said turbine shaft (15) an aggregate (50) is provided to generate an adjustable axial force so as to compensate the axial thrust of the turbine shaft to limit the application of improper axial loads on the ball bearings.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: December 16, 2014
    Assignee: TURBODEN S.r.l.
    Inventors: Mario Gaia, Roberto Bini
  • Patent number: 8894350
    Abstract: A centrifugal pump has a stationary diffuser with a bore. A thrust bearing is pressed into the diffuser bore and has a curved interior. A thrust runner having a curved exterior is correspondingly and closely received by the thrust bearing interior. The thrust runner is keyed to a shaft and transmits thrust from a rotating impeller to the diffuser via the thrust bearing. The curved surface of the thrust bearing allows for handling of both axial and radial thrust without the need for multiple thrust bearings. The increased surface area of the curved surface in the thrust bearing can also handle higher loads.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: November 25, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Christopher M. Brunner, David W. Chilcoat, Jason B. Ives
  • Patent number: 8893499
    Abstract: An expander-generator is disclosed having an expansion device and a generator disposed within a hermetically-sealed housing. The expansion device may be overhung and supported on or otherwise rotate a hollow expansion rotor having a thrust balance seal being arranged at least partially within a chamber defined in the expansion rotor. Partially-expanded working fluid is extracted from an intermediate expansion stage and a first portion of the extracted working fluid is used cool the generator and accompanying radial bearings. A second portion of the extracted working fluid may be introduced into the chamber defined within the expander rotor via a conduit defined in the thrust balance seal chamber. The second portion of extracted working fluid minimizes unequal axial thrust loads on the expander rotor due to the overhung arrangement.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: November 25, 2014
    Assignee: Dresser-Rand Company
    Inventor: William C. Maier
  • Patent number: 8845271
    Abstract: A bearing system for a turbocharger shaft comprising a rotatable elongated cylinder with axially spaced journal bearing surfaces on the inside diameter and a thrust face on each end. A sleeve on the shaft incorporates a flange on one end that transmits thrust force to one thrust face on the elongated cylinder. A flanged collar on the opposite end of the shaft transmits thrust force to the thrust face on the opposite end of the elongated cylinder. A radially extending flange on one end of the elongated cylinder transmits thrust forces to stationary housings.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: September 30, 2014
    Inventors: William E. Woollenweber, Joseph S. Delgado
  • Patent number: 8827636
    Abstract: A turbomachine includes a compressor having a cartridge that is configured to slide in and out of an external casing. The turbomachine further includes an electrical motor having a motor shaft configured to be connected to the compressor shaft. A conduit is configured to extend through the statoric part of the compressor or the motor, from a first magnetic bearing to the second magnetic bearing. The conduit includes conduit electrical cables provided inside the conduit and extending from a first end of the conduit to a second end of the conduit; and electrical cables connecting one of the first and second magnetic bearings to an external connector via the conduit electrical cables of the conduit.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: September 9, 2014
    Assignee: Nuovo Pignone S.p.A
    Inventors: Massimiliano Mariotti, Luciano Mei, Silvio Giachetti
  • Patent number: 8807920
    Abstract: A pump assembly with a rotatable rotor shaft (10), wherein the rotor shaft (10) includes at least one axial bearing (36, 40) and a radial bearing (30, 32), which are integrated into a common bearing assembly (16).
    Type: Grant
    Filed: October 18, 2008
    Date of Patent: August 19, 2014
    Assignee: Grundfos Management a/s
    Inventors: Helge Grann, Alfred Lisbjerg Pedersen
  • Publication number: 20140212269
    Abstract: A fluid flow machine, in particular a steam turbine, is provided having a piston-equalizing line which conducts a vapour from a fresh vapour region of a second flow duct to a thrust-equalizing piston, wherein the surface of the piston-equalizing line is enlarged, and wherein the inner surface of the piston-equalizing line is enlarged.
    Type: Application
    Filed: August 2, 2012
    Publication date: July 31, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Christoph Kastner, Rudolf Potter
  • Patent number: 8764378
    Abstract: A centrifugal pump assembly with at least one impeller (8) and with a thrust bearing (44) which includes a rotating (50) and a stationary (48) bearing part. The rotating (50) as well as the stationary (48) bearing part are designed in a self-aligning manner.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: July 1, 2014
    Assignee: Grundfos Management a/s
    Inventors: Bjarne Dindler Rasmussen, Peter Monster, Carl-Christian Danielsen
  • Patent number: 8616831
    Abstract: A compressor includes a shaft assembly including a thrust disk disposed on a main shaft and a housing having a first portion and a second portion, the first and second portions adapted to receive the shaft assembly and enclose the shaft assembly therebetween, wherein the shaft assembly is rotatably disposed within the housing, and wherein at least one of the first portion and the second portion includes a shaft assembly retention feature for receiving the thrust disk to regulate a motion of the shaft assembly.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: December 31, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Thomas Wollstadt, Grant William Brady, Gary L. Villeneuve
  • Patent number: 8529192
    Abstract: A thrust bearing shaft has an enlarged disk at one axial end to provide a rotating surface in a thrust bearing. A first cylindrical portion extends from the disk. A second cylindrical portion has a smaller diameter than the first cylindrical portion and extends from the first cylindrical portion to an end of the thrust shaft remote from the disk. The thrust shaft has a hollow bore with a ledge extending across the bore at a location within the first cylindrical portion. The ledge is formed with a central hole of a first hole diameter, and twelve air holes spaced circumferentially about the central hole. The twelve holes are formed of a second hole diameter, with a ratio of the first hole diameter to the second hole diameter being between 2.55 and 2.71. In addition, a bearing assembly, a compressor, and a method of assembling a compressor are disclosed.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: September 10, 2013
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Craig M. Beers, Brent J. Merritt
  • Patent number: 8517665
    Abstract: A thrust bearing shaft has a radially enlarged thrust disk to be mounted between two static housing surfaces in an air cycle machine. A first portion of the thrust bearing shaft extends from a first face of the thrust disk. A second portion extends from a second opposed face of the thrust disk. The second portion has sealing ribs and six holes. The sealing ribs are spaced closer to the thrust disk than are the holes. A ratio of a distance from an end of the second portion to a center of the holes compared to a distance from the end of the second portion to the second face of the thrust disk is between 0.20 and 0.22. In addition, an air cycle machine incorporating the thrust bearing shaft, and a method of assembling the thrust bearing shaft into an air cycle machine are disclosed.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: August 27, 2013
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Valentina Lugo, Darryl A. Colson, Craig M. Beers
  • Patent number: 8508062
    Abstract: A turbomachinery electric generator arrangement includes a rotary compressor, a generator having a rotary armature and a stator, a combustion chamber to which compressed gas is directed from the compressor, a rotary turbine to which combustion product is directed from the combustion chamber and a bearing arrangement supporting in rotation the rotary compressor, rotary armature and rotary turbine. Compressed gas for cooling components of the arrangement is directed from the rotary compressor, typically being tapped off from a subsidiary gas output upstream of a primary gas outlet. Bearing thermal shielding and modular construction of components are also features of the arrangement.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: August 13, 2013
    Assignee: Yorlan Holdings Limited
    Inventor: Richard Julius Gozdawa
  • Publication number: 20130189078
    Abstract: A turbine includes a stator (10) and a rotor (20); a plurality of turbine stages (30) through which a flow path of an operating fluid extends; an axial thrust balancing piston (40) arranged at the rotor and a first piston chamber (41) connected to one of the turbine stages (30.1) so that the operating fluid can be conveyed into the first piston chamber with a first fluid pressure, and a second piston chamber (42) has a counterpressure so that an axial thrust opposed to a flow direction of the operating fluid can be exerted on the rotor; and a pressure control device (60) connected to the second piston chamber. The pressure control device constructed to vary the counterpressure by controlled removal of fluid from the second piston chamber so that the axial thrust of the axial thrust balancing piston can be varied.
    Type: Application
    Filed: December 4, 2012
    Publication date: July 25, 2013
    Applicant: MAN Diesel & Turbo SE
    Inventor: MAN Diesel & Turbo SE
  • Publication number: 20130149101
    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: Application
    Filed: November 13, 2012
    Publication date: June 13, 2013
    Applicant: DRESSER-RAND COMPANY
    Inventor: Dresser-Rand Company
  • Patent number: 8425180
    Abstract: A steam turbine power plant that includes a first steam turbine, the steam turbine power plant including: a thrust piston operably connected to the first steam turbine via a shaft; and means for applying a supply of pressurized steam against the thrust piston such that the thrust piston applies a desired thrust force to the shaft. The desired thrust force may comprise a thrust force that partially balances a thrust force the first steam turbine applies to the shaft during operation.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: April 23, 2013
    Assignee: General Electric Company
    Inventors: Kristan B. Sears, Michael J. Bowman, John R. Powers
  • Patent number: 8376722
    Abstract: An electric turbo compressor is an air compressor to be used in a fuel cell system, and includes a housing comprised of a compression casing, a motor casing, and a canceller casing, and the housing houses therein an impeller, a rotary shaft, a thrust canceller (a load cancellation section), and a motor unit. The rotary shaft is supported by a thrust air bearing in its thrust direction, and is axially supported by a radial air bearing in its rotating direction. A thrust load is generated at the rotary shaft when the number of rotations of the impeller increases. The pressure of the compressed air acts to the pressure chamber from the compressed air lead-out section of the compression casing via the compressed air passage, and this pressure acts on the canceller flange of the canceller shaft so as to generate a load towards the rear of the rotary shaft. Therefore, the thrust load is cancelled out.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: February 19, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Junji Takado, Takaharu Sato
  • Patent number: 8337142
    Abstract: A technique is provided to facilitate pumping of fluids in a well environment. A submersible pumping system having a submersible pump incorporates features that manage thrust loads resulting from rotating impellers. The thrust reducing features cooperate with the action of the impellers in one or more pump stages to reduce forces otherwise acting on certain pump related components.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: December 25, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: David M. Eslinger, Matthew R. Hackworth
  • Patent number: 8333548
    Abstract: A turbomachine arranged with a rotor and a stator, including a radial positioning device ensuring that the rotor is radially positioned; and a contactless axial balancing device arranged on at least one bladed wheel for axially balancing the rotor at high speed. The turbomachine includes a thrust bearing distinct from the radial positioning device serving to balance the rotor axially at low speed, and without contact at high speed. In addition, the radial positioning device is constituted by hydrostatic bearings, the turbomachine including hydrostatic bearing feed circuits suitable for connecting the bearings to a source of fluid under pressure. As a result, it is possible to obtain operation at high speeds with a very long lifetime.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: December 18, 2012
    Assignee: Snecma
    Inventors: Valérie Begin, Frédéric Boudehen, François Danguy, Manuel Frocot
  • Patent number: 8235650
    Abstract: A cooling fan includes a fan housing (30) having a central tube (34) extending upwardly therefrom, a bearing (60) being received in the central tube, a stator (20) being mounted around the central tube, and a rotor (10) having a shaft (18) extending through the bearing. At least one notch (180, 184) is defined in an end of the shaft. A balance structure (62) is mounted around the shaft, and has a portion facing and surrounding an upper portion of the at least one notch of the shaft. The balance structure is made of magnetic material, which can attract the shaft downward to thereby counter the upward force generated by the rotor when it is driven to rotate. Accordingly, the noise problem incurred by the floating of the rotating rotor can be resolved by the present invention.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: August 7, 2012
    Assignees: Fu Zhun Precision Industry (Shen Zhen) Co., Ltd., Foxconn Technology Co., Ltd.
    Inventors: Bao-Hua Liang, Yong-Kang Zhang, Jian-Feng Yan, Ying-Min Huang
  • Patent number: 8202037
    Abstract: Disclosed is a steam turbine comprising an exterior housing and an interior housing. The exterior housing and the interior housing are provided with a fresh steam supply duct. A rotor that encompasses several impeller blades and a thrust-compensating piston is rotably mounted within the interior housing. The interior housing is equipped with several guide blades that are disposed such that a flow duct comprising several blade stages, each of which comprises a series of impeller blades and a series of guide blades, is formed along a specific direction of flow. The interior housing is further equipped with a recirculation duct which is embodied as a pipe that communicates between a space located between the interior housing and the exterior housing and the flow duct downstream of a blade stage.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: June 19, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Frank Deidewig, Yevgen Kostenko, Oliver Myschi, Michael Wechsung, Uwe Zander
  • Patent number: 8197183
    Abstract: A turbocharger thrust bearing assembly, which maintains a constant relationship between the thrust faces, for example by use of gimbal or spherical segment geometry. Spherical geometry, while more difficult to manufacture than that of a flat thrust bearing, provides a more constant relationship between the thrust pads and thrust washers than is possible with a typical flat thrust bearing. As a consequence of this more constant relationship the thrust bearing operates with less oil flow, which ultimately may reduce vehicle emissions.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: June 12, 2012
    Assignee: BorgWarner Inc.
    Inventors: Daniel Ward, Allan Kelly
  • Patent number: 8192151
    Abstract: In one embodiment, a turbine may include a bearing housing for a rotor with a passage along an axis of rotation of the rotor shaft. A cooling gland configured to transfer cooling fluid to the passage may be mounted to the bearing housing with a mounting structure configured to mount the cooling gland substantially in-line with the passage of the rotor.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: June 5, 2012
    Assignee: General Electric Company
    Inventor: Henry G. Ballard
  • Patent number: 8182201
    Abstract: There is provided an axial bearing load distribution system for a gas turbine engine of the type having a low pressure rotor supported by axial bearings. The system comprises a line having an inlet end positioned in a high-pressure compressor gas path downstream of any compressor stage provided with a variable geometry. The line is adapted to sense static pressure in the high-pressure compressor gas path. The line has an outlet end producing the static pressure. An air-tight pressure actuator is operatively connected to the outlet end and to one of the axial bearings to exert a force on the axial bearing proportionally to a pressure of the outlet end.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: May 22, 2012
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Daniel T. Alecu, John Watson
  • Patent number: 8157539
    Abstract: By inserting a protruding portion (8b), which is installed to a center position of a rear end surface (8x) of a fixed body (8), into a hole (4a), which is provided to a center position of an end surface (4x) on a side of a fixed body (8) of a fixed shaft (4) that is connected to a fixed body (3), the fixed bodies (3) and (8) and the fixed shaft (4) are connected. As a result, a sleeve (5) can be removed only by dismantling the fixed body (3).
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: April 17, 2012
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Tatsuya Hidaka, Toshiyuki Osada, Takeshi Okubo, Yohei Kakiuchi
  • Patent number: 8104972
    Abstract: A number of machines such as gas turbine engines have asymmetric axial loading along a shaft (2, 3, 4). In order to accommodate for this asymmetric loading, known as an end bearing load, a load share bearing (103) is typically provided. However, specifying the fixed bearing (11, 12) becomes increasingly difficult as space and weight considerations are taken into account. In such circumstances providing a combination of a fixed bearing (11, 12) and a load share bearing (103) to achieve an acceptable bearing end load capacity is more acceptable. The proportion of the combination provided respectively by the fixed bearing and the load share bearing can be varied dependent upon operational stage in order to achieve more efficient operation.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: January 31, 2012
    Assignee: Rolls-Royce PLC
    Inventor: Alan R. Maguire
  • Publication number: 20110188992
    Abstract: A pressure-balancing device for balancing pressure in at least one bearing enclosure of a turbojet, the enclosure including a mechanism feeding the bearing with lubricating liquid, an air intake, at least one sealing system placed between the stator and the rotor in front of and/or behind the bearing, a recovery mechanism recovering the lubricating liquid, and a removal mechanism removing the mixture of air and of traces of lubricating liquid towards a venting circuit. Downstream from the bearing enclosure and in the venting circuit, the balancing device includes a regulator system regulating the air removal flow rate, thereby enabling the flow rate to be variable as a function of the speed of the engine, to remain non-zero, and, at high speeds, to be lower than when the regulator system is not included.
    Type: Application
    Filed: March 24, 2009
    Publication date: August 4, 2011
    Applicant: SNECMA
    Inventors: Ion Fintescu, Laurent Gille, Jean-Pierre Mourlan
  • Publication number: 20110158790
    Abstract: A steam turbine power plant that includes a first steam turbine, the steam turbine power plant including: a thrust piston operably connected to the first steam turbine via a shaft; and means for applying a supply of pressurized steam against the thrust piston such that the thrust piston applies a desired thrust force to the shaft. The desired thrust force may comprise a thrust force that partially balances a thrust force the first steam turbine applies to the shaft during operation.
    Type: Application
    Filed: December 31, 2009
    Publication date: June 30, 2011
    Inventors: Kristan B. Sears, Michael J. Bowman, John R. Powers
  • Patent number: 7931436
    Abstract: Roller bearings, and struts and gas turbine engines using such bearings are provided. In this regard, a representative roller bearing for a gas turbine engine includes: a roller having a rolling surface and an end; a race having a flange and defining a raceway, the raceway terminating at the flange, the raceway being operative to receive the roller such that the rolling surface of the roller engages in rolling contact with the raceway; and a hard coating applied to the flange such that the end of the roller engages in sliding contact with the coating.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: April 26, 2011
    Assignee: United Technologies Corp.
    Inventors: Louis J. Dobek, Jr., David M. Daley
  • Patent number: 7857578
    Abstract: An assembly for preventing damage to bearings of a gas turbine engine during transportation is provided. The assembly comprises a turbofan gas turbine engine having an engine casing and at least one turbine shaft supported by a plurality of bearings, and, a brace secured relative to the engine casing and biasing the shaft along an axial direction of the shaft.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: December 28, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Tibor Urac, Yves Isabel, Gilles Beauvais, Sylvain Giroux
  • Publication number: 20100272556
    Abstract: There is provided an axial bearing load distribution system for a gas turbine engine of the type having a low pressure rotor supported by axial bearings. The system comprises a line having an inlet end positioned in a high-pressure compressor gas path downstream of any compressor stage provided with a variable geometry. The line is adapted to sense static pressure in the high-pressure compressor gas path. The line has an outlet end producing the static pressure. An air-tight pressure actuator is operatively connected to the outlet end and to one of the axial bearings to exert a force on the axial bearing proportionally to a pressure of the outlet end.
    Type: Application
    Filed: April 24, 2009
    Publication date: October 28, 2010
    Inventors: Daniel T. ALECU, John WATSON
  • Patent number: 7703290
    Abstract: A gas turbine engine comprises a rotary compressor (6) which is subject to forward thrust forces and is mounted on an axial shaft (50) which has a forward facing surface (67) located in a thrust bearing (52). A bleed of air under pressure (70, 74, 78) is provided from the compressor to the thrust bearing to form an air cushion (66, 68) opposing the forward thrust of the compressor transmitted by the shaft. The air cushion pressure automatically increases with engine speed. Other air cushion bearings (54, 56) are also provided along the shaft.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: April 27, 2010
    Assignee: Bladon Jets (UK) Limited
    Inventors: Christopher George Bladon, Paul Douglas Bladon, Heather Elizabeth Bladon, legal representative
  • Patent number: 7686572
    Abstract: A pump for the drawing-in of a fluid, including at least one centrifugal wheel having a fluid inlet edge and a fluid outlet edge, the pump further including an axial balancing system with a high-pressure flow space defined between the housing and an upstream face of the centrifugal wheel. The axial balancing system further includes a device for substantially increasing the hydrostatic pressure of the fluid circulating in the high-pressure flow space during operation of the pump.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: March 30, 2010
    Assignee: SNECMA
    Inventors: Fabien Wahl, Francois Danguy, Stephane Laffite, Philippe Bourdin
  • Patent number: 7614853
    Abstract: A turbine shaft may be used to remove a heat load from pliant bearings without requiring the use of a process fluid for cooling the turbine shaft. The turbine shaft comprises a heat conductive sleeve disposed between an outer surface of a tie rod shaft and an inner surface of a bearing journal; the heat conductive sleeve having a sleeve inner surface separated from a sleeve outer surface by a sleeve thickness; the heat conductive sleeve having a first end separated from a second end longitudinally about a center axis; the sleeve outer surface being in physical contact with the inner surface of the bearing journal; and the heat conductive sleeve having a thermal conductivity that is greater than a thermal conductivity of the bearing journal.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: November 10, 2009
    Assignee: Honeywell International Inc.
    Inventor: Marshall Saville
  • Publication number: 20090257895
    Abstract: An electric turbo compressor is an air compressor to be used in a fuel cell system, and includes a housing comprised o a compression casing, a motor casing, and a canceller casing, and the housing houses therein an impeller, a rotary shaft, a thrust canceller (a load cancellation section), and a motor unit. The rotary shaft is supported by a thrust air bearing in its thrust direction, and is axially supported by a radial air bearing in its rotating direction. A thrust load is generated at the rotary shaft when the number of rotations of the impeller increases. The pressure of the compressed air acts to the pressure chamber from the compressed air lead-out section of the compression casing via the compressed air passage, and this pressure acts on the canceller flange of the canceller shaft so as to generate a load towards the rear of the rotary shaft. Therefore, the thrust load is cancelled out.
    Type: Application
    Filed: April 14, 2009
    Publication date: October 15, 2009
    Inventors: Junji TAKADO, Takaharu SATO
  • Publication number: 20090252595
    Abstract: Apparatus is for spacing two relatively rotatable facing surfaces in use by entraining gas between the surfaces. The apparatus includes a first portion defining a generally frusto-conical surface, a second portion including at least one flat surface disposed on a carrier, the flat surface being located adjacent the first portion so that the generally frusto-conical surface and the flat surface face each other and define at least one point of closest engagement between the surfaces, with diverging gaps extending between the surfaces on either side of a plane which contains the point or points of closest engagement and which extends generally orthogonal to the direction of relative rotation, and a device for biasing the flat surface towards the frusto-conical surface to maintain a gap between the surfaces within a predetermined dimensional range. The carrier includes a plurality of portions releasably connected together.
    Type: Application
    Filed: March 25, 2009
    Publication date: October 8, 2009
    Applicant: CROSS MANUFACTURING CO. )1983) LTD.
    Inventors: Edward Henry Cross, Rodney Alan Cross
  • Patent number: 7575413
    Abstract: A centrifugal pump has a stationary diffuser with a bore. A thrust bearing has a tubular portion that inserts into the bore. The thrust bearing has an external shoulder that contacts a support surface in the bore of the diffuser for transmitting downward thrust from an upstream impeller to the diffuser. The thrust bearing has an internal shoulder for transmitting upward thrust from a downstream impeller to the diffuser.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: August 18, 2009
    Assignee: Baker Hughes Incorporated
    Inventors: Ryan P. Semple, Robert C. DeLong, Christopher Brunner, Arturo L. Poretti, Terry W. Shafer
  • Publication number: 20090136334
    Abstract: An exemplary clamp for clamping a bearing cartridge and shaft subassembly of a turbocharger includes an upper portion, a lower portion where the upper portion and the lower portion form a bore having a bore diameter sized to clamp a bearing cartridge and a fluid passage defined in part by the upper portion, the lower portion or the upper portion and the lower portion where the fluid passage includes an opening to the bore. Various other exemplary devices, systems, methods, etc., are also disclosed.
    Type: Application
    Filed: November 28, 2007
    Publication date: May 28, 2009
    Inventor: Anand Cornelio
  • Publication number: 20090067984
    Abstract: A method for axial thrust control of a gas turbine, and a gas turbine with a device for controlling axial thrust are provided. A gas turbine, with regard to aerodynamic forces and pressure forces, which exert an axial force upon the rotor, is configured such that at no-load and low partial load it has a negative thrust, and at high load it has a positive thrust. In order to ensure a resulting positive thrust upon the thrust bearing within the entire load range of the gas turbine, an additional thrust is applied in a controlled manner. The additional thrust for example can be controlled in dependence upon the gas turbine load. The resulting thrust force at full load is consequently less than in the case of a conventionally designed gas turbine without thrust balance.
    Type: Application
    Filed: July 3, 2008
    Publication date: March 12, 2009
    Applicant: ALSTOM TECHNOLOGY LTD.
    Inventors: Stefan Rofka, Rene Waelchli, Sven Olmes, Thomas Zierer
  • Patent number: 7465148
    Abstract: An air-guiding system between a compressor and a turbine of a gas turbine engine includes an air chamber (5) being delimited by the inner casing of the combustion chamber (4) and first and second seals (7, 8) towards the rotating compressor shaft cone (12). An axial thrust compensation chamber (6) is adjoined to said second seal (8) and respectively loaded with the turbine cooling air (B?, C) branched-off from the compressor air. Due to the higher pressure in said axial thrust compensation chamber with respect to said air chamber, the high axial forces are compensated. The air flowing back into said air chamber through said second seal (8) is guided and separated from components (10) and flowing-off air masses by a flow-guiding means (16) in said air chamber. This results in a high rinsing effect, a reduced vortex formation and finally, a reduced thermal stress.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: December 16, 2008
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventor: Holger Klinger
  • Patent number: 7402020
    Abstract: An air cycle machine includes a housing having a compressor housing portion. A shaft is supported by the housing and includes a thrust runner. A hydrodynamic thrust bearing is arranged adjacent to the thrust runner and includes upstream and downstream sides. A compressor rotor is mounted on the shaft. A seal is arranged between the compressor rotor and the compressor housing portion. An orifice is provided in the compressor housing portion at the downstream side of the hydrodynamic bearing. The orifice vents hot compressed air that may leak past the seal prior to reaching the hydrodynamic thrust bearing.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: July 22, 2008
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Craig Beers, Christopher McAuliffe, Brent Merritt
  • Patent number: 7396197
    Abstract: The non-axial force exerted on a pneumatic tool by a non-axial air supply is balanced to allow for uniformly radially distributed compliance forces on the tool. An annular air ring is disposed around the pneumatic tool, covering an air inlet port. Air is supplied by any route to a first air passage that supplies the air to the interior of the annular air ring, exerting a force on the annular air ring. Air flows in the annular space of the air ring, entering the tool air inlet port to drive the pneumatic tool. One or more second air passages are connected to the annular air ring in an even radial distribution. Each second air passage is connected to the air source, or terminates in an air blockage, creating a column of pressurized air that exerts a force on the annular air ring equal to the first air passage. The forces exerted on the air ring are thus balanced with respect to the axis of the tool.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: July 8, 2008
    Assignee: ATI Industrial Automation, Inc.
    Inventor: Douglas K. Lawson
  • Patent number: 7363762
    Abstract: A method of assembling a gas turbine engine includes providing a gas turbine engine including a compressor, a combustor downstream from the compressor, and a turbine coupled to the compressor, and coupling a seal assembly aft of the compressor such that air discharged through the seal assembly facilitates reducing the cavity pressure, and therefore reducing the axial forces induced to an aft side of the compressor.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: April 29, 2008
    Assignee: General Electric Company
    Inventors: Julius John Montgomery, Robert Proctor, Nathan Gerard Cormier, Christopher Charles Glynn, Glen William Royal
  • Patent number: 7338252
    Abstract: A pump for the transporting of fluids and/or of mixtures of fluids includes a housing (1) and at least one restrictor gap seal which is provided in the housing (1) to reduce the pressure in a restrictor gap along a rotatable part (2) of the pump, wherein the restrictor gap seal is formed as a brush seal arrangement (8). The brush seal arrangement (8) contains one or more individual brush seals (8?) which include as sealing members a plurality of sealingly arranged fibers, bristles and/or wires (8a) which are distributed and fastened in ring form and whose free ends extend towards the surface to be sealed.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: March 4, 2008
    Assignee: Sulzer Pumpen AG
    Inventor: Paul Meuter
  • Patent number: 7267523
    Abstract: A turbine shaft may be used to remove a heat load from pliant bearings without requiring the use of a process fluid for cooling the turbine shaft. The turbine shaft comprises a heat conductive sleeve disposed between an outer surface of a tie rod shaft and an inner surface of a bearing journal; the heat conductive sleeve having a sleeve inner surface separated from a sleeve outer surface by a sleeve thickness; the heat conductive sleeve having a first end separated from a second end longitudinally about a center axis; the sleeve outer surface being in physical contact with the inner surface of the bearing journal; and the heat conductive sleeve having a thermal conductivity that is greater than a thermal conductivity of the bearing journal.
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: September 11, 2007
    Assignee: Honeywell International, Inc.
    Inventor: Marshall Saville
  • Patent number: RE43363
    Abstract: A centrifugal pump has a stationary diffuser with a bore. A thrust bearing has a tubular portion that inserts into the bore. The thrust bearing has an external shoulder that contacts a support surface in the bore of the diffuser for transmitting downward thrust from an upstream impeller to the diffuser. The thrust bearing has an internal shoulder for transmitting upward thrust from a downstream impeller to the diffuser.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: May 8, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Ryan P. Semple, Robert C. de Long, Christopher Brunner, Arturo L. Poretti, Terry W. Shafer