Auxiliary Resilient Support Patents (Class 384/106)
  • Patent number: 10487870
    Abstract: The present invention provides a foil bearing (10), including: a top foil portion (Tf); and a back foil portion (Bf), which is arranged on a back of the top foil portion (Tf), and is configured to elastically support the top foil portion (Tf), wherein the back foil portion (Bf) includes: an intermediate portion (23) being flat; first projecting portions (21) projecting on a front side of the intermediate portion (23); and second projecting portions (22) projecting on a back side of the intermediate portion (23).
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: November 26, 2019
    Assignee: NTN CORPORATION
    Inventors: Masato Yoshino, Hiroki Fujiwara, Mitsuo Kawamura
  • Patent number: 10473154
    Abstract: Embodiments disclosed herein are directed to tilting pad bearing assemblies, bearing apparatuses including the tilting pad bearing assemblies, and methods of using the bearing apparatuses. The tilting pad bearing assemblies disclosed herein include a plurality of tilting pads. At least some of the superhard tables exhibit a thickness that is at least about 0.120 inch and/or at least two layers having different wear and/or thermal characteristics.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: November 12, 2019
    Assignee: US SYNTHETIC CORPORATION
    Inventor: Jair J. Gonzalez
  • Patent number: 10221885
    Abstract: A thrust bearing is a thrust bearing disposed facing a thrust collar provided on a rotary shaft and includes a top foil, a back foil and a base plate. The back foil includes a plurality of back foil pieces. The top foil includes a plurality of top foil pieces. In addition, a leading side of the top foil piece in the rotation direction of the rotary shaft is provided with a fixed part fixed to the base plate, an inner circumferential edge side of the top foil piece is provided with an inner circumferential edge-side thin part in which a part is removed from the surface of the top foil piece facing the back foil piece, and the inner circumferential edge-side thin part is formed to be thinner than an outer circumferential edge side of the top foil piece.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: March 5, 2019
    Assignee: IHI CORPORATION
    Inventor: Naomichi Omori
  • Patent number: 10161444
    Abstract: An air foil thrust bearing includes a base plate and a bump foil structure attached to the base plate. The bump foil structure has two or more bump foils and one or more first rings connecting the two or more bump foils. and the air foil thrust bearing includes a top foil structure attached to the base plate. The top foil structure has two or more top foils and one or more second rings connecting the two or more top foils.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: December 25, 2018
    Assignee: Hyundai Motor Company
    Inventor: Chang Ha Lee
  • Patent number: 10012109
    Abstract: A foil bearing includes: a tubular foil holder (31); and a plurality of foils (32) having a radial bearing surface (S1) and being arrayed on an inner peripheral surface (31a) of the foil holder (31) in a circumferential direction. Both circumferential ends (projecting portions (32e) and projecting portion (32c)) of each of the foils (32) are held on the foil holder (31). The foil bearing is configured to support a shaft (6) inserted along an inner periphery thereof in a freely rotatable manner. The plurality of foils (32) are held on the foil holder (31) under a circumferentially movable state.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: July 3, 2018
    Assignee: NTN CORPORATION
    Inventors: Masato Yoshino, Hiroki Fujiwara
  • Patent number: 9976595
    Abstract: In one embodiment, a hybrid foil bearing includes a bearing sleeve, multiple inner foils provided within the sleeve, the foils having gas outlets from which pressurized gas can be injected into an interior of the bearing, and integrated gas flow paths that radially extend through the bearing sleeve and deliver the gas to the gas outlets.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: May 22, 2018
    Assignee: Board of Regents, The University of Texas System
    Inventor: Daejong Kim
  • Patent number: 9695868
    Abstract: A bearing arrangement (28) having at least one radial air bearing (1) and/or having an axial air bearing (15?). The radial air bearing (1) has an inner annular bearing plate (7) and a spring plate (10) which surrounds the bearing plate (7) at the outside. The bearing plate and spring plate being formed as a single-piece component.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: July 4, 2017
    Assignee: BorgWarner Inc.
    Inventors: Dietmar Metz, Martin Mueller
  • Patent number: 9689277
    Abstract: A gas turbine engine including a compressor, a turbine and a static structure is disclosed herein. The gas turbine engine further includes a foil bearing system operative to transmit rotor loads from at least one of the compressor and the turbine to the static structure. The foil bearing system includes a foil bearing and a self-aligning foil bearing mount to align the foil bearing with an axis of rotation of the compressor and the turbine. A snubber operative to transmit rotor loads to the static structure in parallel with the foil bearing is also disclosed.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: June 27, 2017
    Assignee: ROLLS-ROYCE CORPORATION
    Inventor: Steven A. Klusman
  • Patent number: 9366286
    Abstract: A radial foil bearing (3) that supports a rotating shaft (1). This radial foil bearing (3) is provided with a top foil (10), a back foil (11), and a bearing housing (12) that houses them. A through-slot (13) is formed in the inner circumferential surface of the bearing housing (12), and engagement slots (20) are formed in the through-slot (13) by a fixing tool (16).
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: June 14, 2016
    Assignee: IHI CORPORATION
    Inventor: Naomichi Omori
  • Patent number: 9360042
    Abstract: An air bearing assembly is provided that includes a bearing sleeve that has two slots side-by-side having rectangular profiles for engaging the ends of first and second bearing foils for supporting a shaft of a dual-stage compressor. The first rectangular-profile slot, which may be made using a broaching process, is designed to receive first ends of the first bearing foil and the second bearing foil. The second rectangular-profile slot, which may also be made using a broaching process, is designed to receive a second end of the second bearing foil. This dual-slot design replaces the complex ā€œLā€ shaped single slot design of conventional bearing sleeves, allowing for high-volume, low-cost manufacturing of the bearing sleeves. The dual-slot design also provides for robust engagement of the bearing foils with the bearing sleeves, while allowing easy assembly and installation of the air bearing assemblies.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: June 7, 2016
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Glenn F. Thompson, Mark Mackey, John Sontag, John Mason, Rick Johnson, Mike Guidry, Patrick Beresewicz, Keith Alan Hurley, Marshall Saville
  • Patent number: 9028149
    Abstract: Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.222 and 3.224 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: May 12, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Seth E. Rosen, Ronald M. Struziak
  • Patent number: 9011008
    Abstract: The radial foil bearing (3, 20) includes, a cylindrical top foil (10, 21), a back foil (11) disposed on a radially outer side of the top foil (10, 21), and a cylindrical bearing housing (12, 25) accommodating the top foil (10, 21) and the back foil (11). The top foil (10, 21) is formed by winding a rectangular metal foil around a rotary shaft (1) in a circumferential direction thereof. The metal foil includes a first uneven portion (17a, 23a) which has a first projecting portion (15a, 22a) and a first depressed portion (16a, 23a) on a first side thereof, and a second uneven portion (17b, 24b) which has a second projecting portion (15b, 22b) and a second depressed portion (16b, 23b) on a second side opposite to the first side. The metal foil is wound in a cylindrical shape so that the first uneven portion (17a, 23a) and the second uneven portion (17b, 24b) overlap with each other.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: April 21, 2015
    Assignee: IHI Corporation
    Inventor: Naomichi Omori
  • Patent number: 8998493
    Abstract: A split combo bearing including a damper body that has a through-hole through which a rotor shaft passes, a cover that covers both axial sides of the damper body and a predetermined area of the outer circumference of the damper body, a thrust bump that is fixed to the side of the cover, which is in contact with the impeller on a rotor shaft, and is arranged circumferentially around the through-hole, a thrust top foil that is axially fixed to the outermost side of the thrust bump, and a radial top foil that is formed to cover the rotor shaft, and is disposed between the outer side of the rotor shaft and the inner side of the through-hole of the damper body.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: April 7, 2015
    Assignee: Korea Institute of Machinery & Materials
    Inventors: Cheol-hoon Park, Sang-Kyu Choi, Sung Hwi Lee, Sang-Yong Ham, Doo Euy Hong, Tae Gwang Yoon
  • Publication number: 20150086141
    Abstract: The present invention provides an air-foil bearing including a damper body, a front welding plate, and a front top foil for increasing durability, and which has a first bending mode. The damper body includes a front body portion, a rear body portion, and a front protruded portion protruded upward from the front body portion to have a flat protruded surface, and the front welding plate includes a front first contact portion in surface contact with a top surface of the front protruded portion and a front second contact portion which is a portion that is bent from the front first contact portion in surface contact with the front welding plate.
    Type: Application
    Filed: September 18, 2014
    Publication date: March 26, 2015
    Inventors: Cheol-hoon PARK, Sang-Kyu Choi, Doo Euy Hong, Tae Gwang Yoon, Sung Hwi Lee, Sang-Yong Ham
  • Patent number: 8944687
    Abstract: The radial foil bearing (3) for supporting a rotary shaft (1) includes a cylindrical top foil (10) disposed to face the rotary shaft (1), a back foil (11) disposed on a radially outer side of the top foil (10), and a cylindrical bearing housing (12) accommodating the top foil (10) and the back foil (11). The back foil (11) is formed in a cylindrical shape using at least one back foil piece (11a). The back foil piece (11a) includes peak portions (11c) and valley portions (11b) which are alternately formed in a circumferential direction of the top foil (10) and is fixed to the bearing housing (12) at an intermediate portion between both end portions in a circumferential direction of the back foil piece.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: February 3, 2015
    Assignee: IHI Corporation
    Inventor: Naomichi Omori
  • Patent number: 8944688
    Abstract: This relates to a radial foil bearing (3) that supports a rotating shaft (1). The radial foil bearing (3) is provided with a top foil (10), a back foil (11), and a bearing housing (12) that houses them. An engagement notch (15) that extends from the inner circumferential edge to the outer circumferential edge of the bearing housing (12) is formed at both sides of the bearing housing (12). An engagement protruding piece (30) that engages with each engagement notch (15) is provided at both side end portions of the back foil (11) on one side in the circumferential direction of the bearing housing (12).
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: February 3, 2015
    Assignee: IHI Corporation
    Inventors: Naomichi Omori, Tohru Tanaka
  • Publication number: 20150030270
    Abstract: A foil journal bearing applicable to high speed machining and grinding machines for machining microscopic features. A single foil is secured to and supported by a hollow, generally cylindrical, housing. The foil has a length substantially equal to twice the interior circumference of the housing and a mounting feature, extending across its width, for engagement with a feature of complementary shape in the housing. One portion of the foil has a length approximately equal to one half of the foil length, and comprises a bump foil and a plurality of regions comprising groups of generally uniformly-spaced ridges and flats, the regions being separated by extended flat regions. The other portion of the foil has a length approximately equal to one half of the foil length, and comprises the top foil and is generally flat and overlies the bump foil which overlies the interior of the housing.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 29, 2015
    Applicant: Mohawk Innovative Technology, Inc.
    Inventor: Hooshang Heshmat
  • Patent number: 8845193
    Abstract: The radial foil bearing includes a top foil, a back foil, and a bearing housing accommodating the top and back foils, and supports a rotary shaft. Engagement grooves are formed on both side surfaces of the bearing housing to extend from the outer circumferential edge to the inner circumferential edge of the side surface. Notches are formed in circumferential edges on both sides of the back foil. A locking member is locked into the engagement grooves of the bearing housing and the notches of the back foil, and includes a pair of engagement legs engaging with the engagement grooves and the notches, and a connection portion connecting the engagement legs together to be disposed near one ends of the engagement legs.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: September 30, 2014
    Assignee: IHI Corporation
    Inventor: Naomichi Omori
  • Publication number: 20140241653
    Abstract: The radial foil bearing for surrounding and supporting a rotary shaft includes a cylindrical top foil disposed so as to face the rotary shaft, a back foil disposed at a radially outer side of the top foil, and a cylindrical bearing housing accommodating the top foil and the back foil. Engagement-projecting portions are provided on both ends of an inner circumferential surface of the bearing housing. Engagement notches engaging with the engagement-projecting portions are formed on both ends of the back foil.
    Type: Application
    Filed: May 6, 2014
    Publication date: August 28, 2014
    Applicant: IHI Corporation
    Inventor: Naomichi OMORI
  • Patent number: 8801290
    Abstract: A foil journal bearing applicable to high speed machining and grinding machines for machining microscopic features. A single foil is secured to and supported by a hollow, generally cylindrical, housing. The foil has a length substantially equal to twice the interior circumference of the housing and a mounting feature, extending across its width, for engagement with a feature of complementary shape in the housing. One portion of the foil has a length approximately equal to one half of the foil length, and comprises a bump foil and a plurality of regions comprising groups of generally uniformly-spaced ridges and flats, the regions being separated by extended flat regions. The other portion of the foil has a length approximately equal to one half of the foil length, and comprises the top foil and is generally flat and overlies the bump foil which overlies the interior of the housing.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: August 12, 2014
    Assignee: Mohawk Innovative Technology, Inc.
    Inventor: Hooshang Heshmat
  • Publication number: 20140219590
    Abstract: This relates to a radial foil bearing (3) that supports a rotating shaft (1). The radial foil bearing (3) is provided with a top foil (10), a back foil (11), and a bearing housing (12) that houses them. An engagement notch (15) that extends from the inner circumferential edge to the outer circumferential edge of the bearing housing (12) is formed at both sides of the bearing housing (12). An engagement protruding piece (30) that engages with each engagement notch (15) is provided at both side end portions of the back foil (11) on one side in the circumferential direction of the bearing housing (12).
    Type: Application
    Filed: April 7, 2014
    Publication date: August 7, 2014
    Applicant: IHI Corporation
    Inventors: Naomichi OMORI, Tohru TANAKA
  • Publication number: 20140169708
    Abstract: The radial foil bearing (3) for supporting a rotary shaft (1) includes a cylindrical top foil (10) disposed to face the rotary shaft (1), a back foil (11) disposed on a radially outer side of the top foil (10), and a cylindrical bearing housing (12) accommodating the top foil (10) and the back foil (11). The back foil (11) is formed in a cylindrical shape using at least one back foil piece (11a). The back foil piece (11a) includes peak portions (11c) and valley portions (11b) which are alternately formed in a circumferential direction of the top foil (10) and is fixed to the bearing housing (12) at an intermediate portion between both end portions in a circumferential direction of the back foil piece.
    Type: Application
    Filed: July 25, 2012
    Publication date: June 19, 2014
    Applicant: IHI Corporation
    Inventor: Naomichi Omori
  • Publication number: 20140154058
    Abstract: A rotating assembly of turbomachinery is provided. The rotating assembly includes a plurality of components mounted on a rotatable shaft within a housing of the turbomachinery and at least one foil journal bearing assembly for mounting the rotatable shaft to the housing. The foil journal bearing assembly includes an annular bearing carrier mounted to the housing. An annular bearing sleeve is disposed within the annular bearing carrier and attached thereto. The annular bearing sleeve is lined with a plurality of foils. A journal is mounted to the rotatable shaft. The journal has an outer surface engaging the foils. The journal is configured to at least one of the following: resist operational deflection thereof and reduce the effects of misalignment. A method for producing the journal of the foil journal bearing assembly is also provided.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Walter Lee Meacham, Alan Margolis, Yates Wong
  • Publication number: 20140153850
    Abstract: The radial foil bearing (3, 20) includes, a cylindrical top foil (10, 21), a back foil (11) disposed on a radially outer side of the top foil (10, 21), and a cylindrical bearing housing (12, 25) accommodating the top foil (10, 21) and the back foil (11). The top foil (10, 21) is formed by winding a rectangular metal foil around a rotary shaft (1) in a circumferential direction thereof. The metal foil includes a first uneven portion (17a, 23a) which has a first projecting portion (15a, 22a) and a first depressed portion (16a, 23a) on a first side thereof, and a second uneven portion (17b, 24b) which has a second projecting portion (15b, 22b) and a second depressed portion (16b, 23b) on a second side opposite to the first side. The metal foil is wound in a cylindrical shape so that the first uneven portion (17a, 23a) and the second uneven portion (17b, 24b) overlap with each other.
    Type: Application
    Filed: July 6, 2012
    Publication date: June 5, 2014
    Inventor: Naomichi Omori
  • Patent number: 8672549
    Abstract: An improved air foil bearing assembly is disclosed. The air foil bearing assembly includes a bearing housing having an axially extending bore therein and a shaft arranged within the bore for relative coaxial rotation with respect to the bearing housing. The shaft cooperates with the bearing housing to define an annular gap therebetween. A foil assembly is disposed in the annular gap, including at least one foil having at least one laterally extending tab. The tab is adapted to be received in and extend axially from the annular gap and is further adapted to be bent into frictional contact with an outer surface of the bearing housing to militate against axial movement of the foil.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: March 18, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Brian S. Flora, Steven L. Clark, Jon R. Sienkowski, Stephan M. Ruchenewitz
  • Patent number: 8602653
    Abstract: A foil thrust bearing applicable to high speed machining and grinding machines for machining microscopic features. Top foil segments are circumferentially spaced relative to a rotating runner for engagement by the runner when the bearing is mounted to bearingly support runner rotation. Bump foil segments underlie and support and engage the top foil segments respectively. A thrust plate supports and engages the bump foil segments. Each top foil segment and each bump foil segment is secured only along an edge portion which is trailing relative to the runner rotation leaving an edge which is leading relative to runner rotation and a pair of side edges unsecured. Each bump foil segment includes tabs separated by slots extending from the leading edge at least partially to the secured edge portion. Each bump foil tab has substantially parallel ridges separated by flats.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: December 10, 2013
    Assignee: Mohawk Innovative Technology, Inc.
    Inventor: Hooshang Heshmat
  • Patent number: 8500331
    Abstract: An air foil bearing includes a top foil, one or more orifice tubes and two or more bump foil strips disposed within a housing. The top foil is forms a substantially circular shape having one or more sets of top foil orifice holes. Each set of top foil orifice holes has at least three top foil orifice holes along a circumference of the top foil. An orifice tube is provided for each set of top foil orifice holes. The orifice tube includes a flat side having a set of tube orifice holes connected to an outer surface of the top foil. The bump foil strip is attached to the outer surface of the top foil adjacent to each side of each orifice tube. Another embodiment uses a housing with an inner surface having a curved polygonal cross-sectional shape with an odd number of curved sides.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: August 6, 2013
    Assignees: Board of Regents, The University of Texas System, Korea Institute of Machinery and Materials
    Inventors: Daejong Kim, An Sung Lee, Young-Cheol Kim
  • Patent number: 8475048
    Abstract: A dynamic foil gas bearing includes a foil group comprising a corrugated-sheet-like bump foil, a flat-sheet-like middle foil, and a flat-sheet-like top foil which are arranged successively toward the center axis of a bearing case. The top foil includes a second linkage surface joined to a second fixed surface fixed to an inner circumferential surface of the bearing case and also joined to a second rotatable shaft holding surface. The second linkage surface is provided by a curved portion of the top foil which is convex toward the center axis of the bearing case. The middle foil includes a first linkage surface joined to a first fixed surface fixed to the inner circumferential surface of the bearing case and also joined to a first rotatable shaft holding surface. The first linkage surface is provided by a bent straight portion of the middle foil.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: July 2, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasuhisa Kume, Noriyuki Mizojiri
  • Patent number: 8419283
    Abstract: An example journal air bearing for a rotatable shaft of an air cycle machine includes a top foil configured to receive a rotatable shaft, and an intermediate foil radially outboard the top foil. A journal sleeve is radially outboard the intermediate foil. The top foil and the intermediate foil establish apertures configured to communicate fluid between a first position radially inboard the top foil and a second position radially outboard the intermediate foil.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: April 16, 2013
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Christopher McAuliffe, Ronald M. Struziak
  • Patent number: 8414191
    Abstract: An improved air foil bearing assembly is disclosed. The air foil bearing assembly includes a bearing housing having an axially extending bore therein and a shaft arranged within the bore for relative coaxial rotation with respect to the bearing housing. The shaft cooperates with the bearing housing to define an annular gap therebetween. A foil assembly is disposed in the annular gap, including at least one foil having at least one laterally extending tab. The tab is adapted to be received in and extend axially from the annular gap and is further adapted to be bent into frictional contact with an outer surface of the bearing housing to militate against axial movement of the foil.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: April 9, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Brian S. Flora, Steven L. Clark, Jon R. Sienkowski, Stephan M. Ruchenewitz
  • Patent number: 8360645
    Abstract: A foil bearing supports a cylindrical rotary shaft 2, the foil bearing including: a hollow cylindrical outer ring 4 which is supported by a stationary member, and surrounds the rotary shaft with a predetermined gap therebetween; a thin-film-shaped top foil 3a which surrounds the outer surface of the rotary shaft, and of which one circumferential end is fixed to the inner surface of the outer ring; and a back foil 3b which is formed by a thin film sandwiched between the top foil and the inner surface of the outer ring and elastically supporting the top foil. The back foil 3b includes a support portion which comes into contact with the inner surface of the outer ring and is immovable in the circumferential direction, and an elastic portion which is supported by the support portion and is elastically bent in the radial direction by surface pressure from the top foil.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: January 29, 2013
    Assignee: IHI Corporation
    Inventor: Naomichi Omori
  • Patent number: 8353631
    Abstract: A journal foil air bearing 5000 according to the present invention is provided with one top foil 300 along an inner periphery of a hole 18 of a bearing housing 10. Bump foils 20c and 20d are installed at the inner periphery of the hole 18 of the bearing housing 10 where they are distanced from each other. Both ends of the top foil 300 form bent portions 308a and 308b and the bent portions 308a and 308b are mounted in a slot 414 of a slot body 40 mounted in a slot 140 provided in the inner periphery of the hole 18 in the bearing housing 10 and the top foil 300 is elastically movable therein.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: January 15, 2013
    Assignee: Neuros Co., Ltd.
    Inventor: Kyeong Su Kim
  • Publication number: 20120281937
    Abstract: A foil journal bearing applicable to high speed machining and grinding machines for machining microscopic features. A single foil is secured to and supported by a hollow, generally cylindrical, housing. The foil has a length substantially equal to twice the interior circumference of the housing and a mounting feature, extending across its width, for engagement with a feature of complementary shape in the housing. One portion of the foil has a length approximately equal to one half of the foil length, and comprises a bump foil and a plurality of regions comprising groups of generally uniformly-spaced ridges and flats, the regions being separated by extended flat regions. The other portion of the foil has a length approximately equal to one half of the foil length, and comprises the top foil and is generally flat and overlies the bump foil which overlies the interior of the housing.
    Type: Application
    Filed: April 6, 2012
    Publication date: November 8, 2012
    Inventors: Hooshang Heshmat, Michael J. Tomaszewski
  • Publication number: 20120251300
    Abstract: A bearing foil assembly includes a top foil, an intermediate foil, and a bump foil. The bump foil is provided with corrugations at circumferentially spaced locations. The bump foil has an end that is bent radially outwardly from a center of the foil assembly. The top foil has a bent portion extending radially outwardly and adjacent to the bent end of the bump foil. A first radius of curvature is defined to a curved portion leading into the bent portion at a first end adjacent to the bent end. A second radius of curvature is defined at an end of the bent portion on an end opposed to the bent end. A ratio of the first radius of curvature to the second radius of curvature is between 0.6 and 10. A bearing assembly, a shaft sub-assembly, an air machine, and a method of assembling a bearing into an air machine are also disclosed.
    Type: Application
    Filed: April 4, 2011
    Publication date: October 4, 2012
    Inventor: Ronald M. Struziak
  • Publication number: 20120224797
    Abstract: A pre-stressed air bearing includes: a seat member having a seat body and an adjustment section outward extending from a connection end face of the seat body along a geometrical central axis thereof by a predetermined length, an extension end of the adjustment section being slidably connected with a platform, at least one air passage being formed in the seat body, the air passage having at least one air outlet formed on a working end face of the seat body opposite to the connection end face; at least one reception section formed on the working end face in the form of a recess; at least one magnetic member received in the reception section; and a resilient section slidably disposed on the adjustment section between the seat body and the platform for providing a resilient force to keep the seat body spaced from the platform by a buffering gap.
    Type: Application
    Filed: March 5, 2011
    Publication date: September 6, 2012
    Inventors: Wei-Lin Chang, Chang-Cheng Ho
  • Patent number: 8202003
    Abstract: A gas turbine engine bearing assembly for a portion of a shaft that rotates around an axis, including a substantially cylindrical bearing having a length extending between a first end and a second end along the axis of the rotating shaft. A plurality of segmented damper springs are positioned around an exterior perimeter of a portion of the cylindrical bearing. Each spring has a width along the axis of the rotating shaft and a portion of each spring defines an outer spherically contoured joint. The width of each spring is less than the length of the bearing.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: June 19, 2012
    Assignee: Rolls-Royce North American Technologies, Inc.
    Inventors: Steven Arlen Klusman, Preston Earl Light
  • Patent number: 8100586
    Abstract: A rotary machine includes a rotary component disposed to rotate with respect to a stationary component. A foil bearing is disposed between the stationary component and the rotary component and configured to rotatably support the rotary component. A fiber optic sensing system including one or more fiber optic sensors is disposed in the foil bearing and configured to detect one or more parameters related to the foil bearing.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: January 24, 2012
    Assignee: General Electric Company
    Inventors: Eric John Ruggiero, Hua Xia, Bugra Han Ertas, Matthew Kaminske
  • Patent number: 8092158
    Abstract: A method of positioning a shaft and associated seal in turbomachinery utilizing electromagnetic bearings. The method includes applying electrical power to the electromagnetic bearings' windings, the shaft center being in a first position and the shaft being in contact with the associated seal. Power adjustment to the electromagnetic bearings moves the shaft. Shaft movements can manipulate the seal, the movements being of decreasing amplitude to a position in which the seal is out of contact with the shaft when the shaft is rotated at its centered position during normal operation. The shaft is in its centered position during normal operation when the shaft axis is substantially coaxial with an axis of the electromagnetic bearings. Movements of decreasing amplitude may include oscillations of decreasing amplitude about one or more axes, or may include a spiral rotation with a decreasing radius to move the shaft center from initial to final positions.
    Type: Grant
    Filed: August 11, 2008
    Date of Patent: January 10, 2012
    Assignee: Johnson Controls Technology Company
    Inventor: Paul Marie De Larminat
  • Publication number: 20110243485
    Abstract: A dynamic foil gas bearing includes a foil group comprising a corrugated-sheet-like bump foil, a flat-sheet-like middle foil, and a flat-sheet-like top foil which are arranged successively toward the center axis of a bearing case. The top foil includes a second linkage surface joined to a second fixed surface fixed to an inner circumferential surface of the bearing case and also joined to a second rotatable shaft holding surface. The second linkage surface is provided by a curved portion of the top foil which is convex toward the center axis of the bearing case. The middle foil includes a first linkage surface joined to a first fixed surface fixed to the inner circumferential surface of the bearing case and also joined to a first rotatable shaft holding surface. The first linkage surface is provided by a bent straight portion of the middle foil.
    Type: Application
    Filed: March 30, 2011
    Publication date: October 6, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Yasuhisa KUME, Noriyuki MIZOJIRI
  • Patent number: 8029194
    Abstract: A hydrodynamic fluid film bearing assembly has a stationary retaining member defining a central opening and having an inner surface lined by a foil assembly comprised of a plurality of foil subassemblies. Each foil subassembly comprises a first compliant foil, a second compliant foil, and a spring foil, and subtending a rotational segment, less than all, of the inner surface of the retaining member. The complaint foils and the spring foil of each foil subassembly are held within the retaining member in such a way that sliding travel of one compliant foil along the inner surface of the opening is in the opposite rotational direction of sliding travel of the other compliant foil and the spring foil. The foil subassemblies may be restrained from undesired movement during operation by a retention tab extending from the foil subassembly which engages a channel and recess feature formed in the retaining member.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: October 4, 2011
    Assignee: R&D Dynamics Corporation
    Inventors: Giridhari L. Agrawal, Thomas A. Accomazzo, Michael Brophy
  • Publication number: 20110229065
    Abstract: An improved air foil bearing assembly is disclosed. The air foil bearing assembly includes a bearing housing having an axially extending bore therein and a shaft arranged within the bore for relative coaxial rotation with respect to the bearing housing. The shaft cooperates with the bearing housing to define an annular gap therebetween. A foil assembly is disposed in the annular gap, including at least one foil having at least one laterally extending tab. The tab is adapted to be received in and extend axially from the annular gap and is further adapted to be bent into frictional contact with an outer surface of the bearing housing to militate against axial movement of the foil.
    Type: Application
    Filed: March 19, 2010
    Publication date: September 22, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Brian S. Flora, Steven L. Clark, Jon R. Sienkowski, Stephan M. Ruchnewitz
  • Patent number: 7954998
    Abstract: A hydrodynamic bearing set, for use with a thrust disk disposed between planar surfaces of a housing, includes first and second topfoils disposed adjacent first and second thrust disk axial bearing surfaces and removably secured to the housing. An underspring is secured between each planar housing surface and the corresponding topfoil. Dual-leaf spring pairs attached to at least one topfoil periphery function to urge the topfoils away from the thrust disk axial bearing surfaces by applying a force against a planar housing surface, another topfoil, or a spacer washer secured between adjacent topfoil dual-leaf pairs or frictionally retained within the housing. Alternatively, a wavy washer, a conical spring, a Belleville washer, or a coil spring can be substituted for the dual-leaf spring pairs.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: June 7, 2011
    Assignee: Honeywell International, Inc.
    Inventors: Marshall Saville, Keith A Hurley, Aileen Mah, Sun Goo Alan Kang
  • Publication number: 20110052110
    Abstract: A journal foil air bearing 5000 according to the present invention is provided with one top foil 300 along an inner periphery of a hole 18 of a bearing housing 10. Bump foils 20c and 20d are installed at the inner periphery of the hole 18 of the bearing housing 10 where they are distanced from each other. Both ends of the top foil 300 form bent portions 308a and 308b and the bent portions 308a and 308b are mounted in a slot 414 of a slot body 40 mounted in a slot 140 provided in the inner periphery of the hole 18 in the bearing housing 10 and the top foil 300 is elastically movable therein.
    Type: Application
    Filed: September 29, 2009
    Publication date: March 3, 2011
    Applicant: NEUROS CO., LTD.
    Inventor: Kyeong Su Kim
  • Publication number: 20110033142
    Abstract: An air foil bearing includes a top foil, one or more orifice tubes and two or more bump foil strips disposed within a housing. The top foil is forms a substantially circular shape having one or more sets of top foil orifice holes. Each set of top foil orifice holes has at least three top foil orifice holes along a circumference of the top foil. An orifice tube is provided for each set of top foil orifice holes. The orifice tube includes a flat side having a set of tube orifice holes connected to an outer surface of the top foil. The bump foil strip is attached to the outer surface of the top foil adjacent to each side of each orifice tube. Another embodiment uses a housing with an inner surface having a curved polygonal cross-sectional shape with an odd number of curved sides.
    Type: Application
    Filed: January 26, 2010
    Publication date: February 10, 2011
    Applicants: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM, KOREA INSTITUTE OF MACHINERY AND MATERIALS
    Inventors: Daejong Kim, An Sung Lee, Young-Cheol Kim
  • Patent number: 7658545
    Abstract: A foil-fluid bearing assembly adapted for supporting a shaft within an outer bearing housing and is adapted for accommodating angular misalignment of the rotating shaft relative to the housing.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: February 9, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Jean Dubreuil, Denis Leclair
  • Patent number: 7648280
    Abstract: A hydrodynamic fluid film journal bearing system includes a journal sleeve and one or more hydrodynamic fluid film foils positioned at least partially within the journal sleeve. The journal sleeve defines an inner diameter surface, an outer diameter surface, a wall thickness between the inner and outer diameter surfaces, and opposite first and second ends. The wall thickness of the journal sleeve is reduced at a first region located between the first and second ends, and a chamfered region is formed on the outer diameter surface of the journal sleeve between the first o-ring land and the first end of the journal sleeve.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: January 19, 2010
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Ronald M. Struziak, Christopher McAuliffe, Jeffery L. Stark
  • Patent number: 7648279
    Abstract: A hydrodynamic fluid film journal bearing assembly includes a journal sleeve having a key slot formed therein in a substantially longitudinal direction, a bump foil wrapped in a substantially cylindrical shape adjacent to the journal sleeve and having a bent end portion engaged with the key slot, an intermediate foil wrapped in a substantially cylindrical shape adjacent to the bump foil, a top foil wrapped in a substantially cylindrical shape adjacent to the intermediate foil, a first top foil cutout window formed adjacent to the bent region, and a first end tab formed at a free end of the top foil. The first end tab is wrapped with the top foil in the substantially cylindrical shape of the top foil, and extends into the first top foil cutout window to reduce skewing. The top and intermediate foils are joined at a bent region that engages the key slot.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: January 19, 2010
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Ronald M. Struziak, Christopher McAuliffe, Jeffery L. Stark
  • Patent number: 7614792
    Abstract: A compliant foil fluid film bearing or seal apparatus includes a bushing having a plurality of peripherally separate bushing segments. The bushing has a bore defined therethrough, with a peripheral portion of the bore being defined on each bushing segment. A plurality of compliant foils is carried by the bushing, with at least one of the compliant foils being disposed on each bushing segment. A plurality of foil undersprings is disposed beneath the plurality of compliant foils.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: November 10, 2009
    Assignee: Capstone Turbine Corporation
    Inventors: Jonathan Wade, Daniel Lubell
  • Publication number: 20090185766
    Abstract: A foil-fluid bearing assembly adapted for supporting a shaft within an outer bearing housing and is adapted for accommodating angular misalignment of the rotating shaft relative to the housing.
    Type: Application
    Filed: April 2, 2004
    Publication date: July 23, 2009
    Inventors: Jean Dubreuil, Denis Leclair
  • Patent number: RE48269
    Abstract: A thrust foil bearing includes a thrust member, and a foil member mounted to an end surface of the thrust member and having a thrust bearing surface that forms a thrust bearing gap. The foil member includes a foil that integrally includes a plurality of leaves each having a free end on one side in a circumferential direction and the thrust bearing surface, and a coupling portion for coupling the plurality of leaves to each other.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: October 20, 2020
    Assignee: NTN CORPORATION
    Inventor: Masato Yoshino