Flexible Member Patents (Class 384/103)
  • Patent number: 10826360
    Abstract: A motor, a rotor and a sleeve are provided. The motor includes a stator and a rotor which includes a shaft, a rotor core, a sleeve, a commutator, and a rotor winding wound on the rotor core. The sleeve is arranged between the rotor core and the commutator. The sleeve includes a first end portion close to the commutator, a second end portion close to the rotor core, and a middle portion therebetween. An outer diameter of the first end portion is smaller than an outer diameter of the middle portion, and the outer diameter of the middle portion is smaller than an outer diameter of the second end portion. An end of the commutator close to the sleeve has a groove, and the first end portion of the sleeve is placed in the groove. The rotor has a good seismic performance.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: November 3, 2020
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Siukin Tam, Huaping Zeng, Zhengsheng Chen
  • Patent number: 10781853
    Abstract: The radial foil bearing (3, 3A, 3B) includes: a housing (12) provided with an insertion hole (12a), a pair of engagement grooves (15) extending outward in a radial direction from an inner peripheral edge of the insertion hole being provided in both end surfaces in an axial direction of the housing; a back foil (11) disposed on an inner circumferential surface of the insertion hole; an intermediate foil (10) supported by the back foil; and an engagement member (30) including a pair of engagement legs (31) engaging with the pair of engagement grooves, and a connection portion (32) connecting the pair of engagement legs. The intermediate foil is provided with a recess (10c) recessed and protruding toward the back foil, and the connection portion is disposed in the recess.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: September 22, 2020
    Assignee: IHI CORPORATION
    Inventor: Naomichi Omori
  • Patent number: 10533606
    Abstract: An example embodiment of an air bearing assembly includes a first member and a shaft with a flange configured to rotate with respect to the first member. The first member has a first coating on at least one first surface facing at least one second surface on the flange or the shaft. The first coating includes tungsten carbide, a nonpolymeric self-lubricating coating, or a combination thereof. At least one of the second surfaces has a second coating on a surface facing the first coating.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: January 14, 2020
    Inventors: Steven Poteet, Blair A. Smith, Kevin M. Rankin, William R. Fiske
  • Patent number: 10520024
    Abstract: An electromagnetically enabled active dynamic pressure gas bearing is provided and includes an electromagnetic bearing and an elastic foil bearing sleeved between the electromagnetic bearing and a rotor shaft. The elastic foil bearing includes a top layer elastic foil and a bottom layer elastic foil, the top layer elastic foil is made of non-magnetic material, and a plurality of separate magnetic material areas are distributed on a surface of the top layer elastic foil.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: December 31, 2019
    Assignee: Technologies' Xanadu of Resonatory-Solar-Systemed Co., Ltd.
    Inventor: Pu Jin
  • Patent number: 10480568
    Abstract: Particles (23) are supplied to a bearing gap of a foil bearing. A step (24) is formed in a top foil portion (12a1), to thereby generate an air flow from both end portions (121 and 122) in a direction (N) along a surface of the top foil portion (12a1) and orthogonal to a rotation direction (R) of a shaft (6) toward a region between the both end portions.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: November 19, 2019
    Assignee: NTN CORPORATION
    Inventor: Masato Yoshino
  • Patent number: 10473153
    Abstract: An air foil bearing assembly is provided. The air foil bearing assembly includes a bearing housing that has a hollow into which a rotary shaft is fitted and a slot of which both ends are open toward front and rear sides formed on an inner circumference surface of the hollow. A bump foil is provided to have a combining portion inserted to the slot and disposed in the inner circumference surface of the hollow. A top foil having a combining portion is inserted to the slot and is disposed in an inner side of the bump foil. A stopper is disposed on one of the combining portions of the bump foil or the top foil to prevent the combining portion of the bump foil or the top foil from being displaced from the slot toward the front and rear sides.
    Type: Grant
    Filed: July 15, 2018
    Date of Patent: November 12, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporatlion
    Inventors: Kyoung Ku Ha, Chang Ha Lee
  • Patent number: 10465743
    Abstract: A foil bearing for supporting a shaft includes a sleeve-type baring housing, at least one elastic corrugated foil arranged on the inner circumference of the bearing housing, and a respective top foil covering each corrugated foil and forming a bearing surface. The bearing housing includes insertion grooves defined therein that extend from the inner surface of the bearing housing and outwardly. The fop foil and the corrugated foil each have ends that are inserted into and received by the insertion grooves.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: November 5, 2019
    Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KG
    Inventors: Wolfgang Braun, Simon Wehner, Philipp Wirth
  • Patent number: 10408232
    Abstract: A turbo machine according to present disclosure includes a rotating shaft, a first impeller, a first fluid bearing, a first holding member, a first lubricating liquid casing, a first supplying passage, and a first squeeze film damper. The first fluid bearing rotatably supports the first taper portion and the first cylindrical portion. The first fluid bearing is attached to the first holding member. The first lubricating liquid casing forms a first storing space. The first supplying passage is a passage through which a lubricating liquid is supplied to the first storing space. The first squeeze film damper is a space located between the first fluid bearing and the first holding member. The first squeeze film damper communicates with the first supplying passage.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: September 10, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takeshi Ogata, Tadayoshi Shoyama, Akira Hiwata, Hidetoshi Taguchi, Kazuyuki Kouda, Hiroshi Hasegawa
  • Patent number: 10352356
    Abstract: A foil bearing includes a foil holder and a plurality of foils fixed to the foil holder and arrayed in a circumferential direction. Each of the foils includes a top foil portion having a bearing surface, an extending portion formed on one circumferential side of the top foil portion, an underfoil portion formed on another circumferential side of the top foil portion, and an insertion slot formed between the top foil portion and the underfoil portion in the circumferential direction. The insertion slot includes a positioning portion and a wide portion that is larger in circumferential width than the positioning portion and is opened to an end portion of each of the foils. An edge of the top foil portion, which is opposed to the wide portion, retreats toward the one circumferential side with respect to an edge opposed to the positioning portion.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: July 16, 2019
    Assignee: NTN CORPORATION
    Inventors: Masato Yoshino, Hiroki Fujiwara
  • Patent number: 10309256
    Abstract: A bumper bearing assembly includes a bearing housing having a level of radial spring stiffness, wherein the bearing housing defines a bearing seat. A bumper bearing is connected to the bearing housing by a spring having a level of radial spring stiffness lower than that of the bearing housing. The bumper bearing is configured to apply the level of radial spring stiffness of the spring against a rotor with the bumper bearing spaced apart from the bearing seat. The bearing housing is configured to apply the level of radial spring stiffness of the bearing housing against the rotor with the bumper bearing seated against the bearing seat.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: June 4, 2019
    Assignee: UNITED TECHNOLOGIES CORPOATION
    Inventors: Loc Quang Duong, Xiaolan Hu
  • Patent number: 10309450
    Abstract: A foil bearing includes a bearing back, a foil arrangement, and a setting mechanism. The bearing back includes a passage opening configured to receive a shaft, such that a gap is formed between the shaft and the bearing back. The foil arrangement defines a first inner circumference and includes a first segment-shaped foil arranged in the gap adjacent to the bearing back, a second segment-shaped foil arranged in the gap adjacent to the first segment-shaped foil, and a third segment-shaped foil arranged in the gap between the shaft and the second segment-shaped foil. The setting mechanism is configured to set the first inner circumference.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: June 4, 2019
    Assignee: Robert Bosch GmbH
    Inventor: Andreas Vogt
  • Patent number: 10228015
    Abstract: A hybrid dynamic pressure gas radial bearing, which comprises a bearing outer sleeve, an inner sleeve and a foil type elastic part arranged between the bearing outer sleeve and the inner sleeve, the outer circumferential face and the left and right end faces of the bearing inner sleeve are respectively provided with regular groove-type patterns, and the groove-type patterns in one end face is in mirror symmetry with the groove-type pattern in the other end face, and the axial contour lines of the groove-type patterns in the outer circumference face and the radial contour lines of the groove-type patterns in the left and right end faces are in one-to-one correspondence and are connected with each other, has the rigidity characteristic of the high-limit rotating speed of the radial bearing of the groove-type dynamic pressure gas.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: March 12, 2019
    Inventor: Lifeng Luo
  • Patent number: 9989085
    Abstract: A journal foil bearing includes a bearing retainer having one slot configured to receive a top foil leading edge tab and another slot configured to receive a top foil trailing edge tab. A backup support structure, integral to the bearing retainer, extends between and is at least partially defined by the slots. The retainer is configured so that, during operation, the trailing edge tab further contacts, at an increased contact pressure, the support structure at a position close to the friction force, thereby minimizing top foil bending stress and improving bearing strength.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: June 5, 2018
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Marshall Saville, Keith Alan Hurley
  • Patent number: 9915286
    Abstract: A radial foil bearing includes: a cylindrical top foil disposed so as to face a rotary shaft; a back foil disposed outside in the radial direction of the top foil; and a cylindrical bearing housing accommodating the top foil and the back foil. The bearing housing is provided with a limiting member which limits movement of the back foil. A locking recess is provided in a central part in the axial direction of an inner circumferential surface of the bearing housing. In addition, the limiting member includes a locking protrusion and is fixed to the bearing housing by the locking protrusion being locked into the locking recess.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: March 13, 2018
    Assignee: IHI CORPORATION
    Inventor: Naomichi Omori
  • Patent number: 9797303
    Abstract: Turbochargers typically have separate hydrodynamic journal and thrust bearings. A turbocharger thrust bearing for a turbocharger is provided that merges the function of a journal bearing into a thrust bearing while maintaining the thrust bearing function to produce a turbocharger with a reduced axial space envelope. Such a thrust bearing includes a bore contoured to have a plurality of taper-land pairs distributed circumferentially about the bore. As a result, the axial length of the turbocharger bearing housing and shaft can be reduced.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: October 24, 2017
    Assignee: BorgWarner Inc.
    Inventor: Daniel N. Ward
  • Patent number: 9732789
    Abstract: A journal air bearing is provided. The bearing includes a top foil configured to receive the shaft, an intermediate foil disposed radially outboard the top foil, and a journal sleeve disposed radially outboard the intermediate foil. The intermediate foil defines a plurality of holes configured to act as a vent to communicate fluid to an increased supply area to an air film.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: August 15, 2017
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Christopher McAuliffe, Ronald M. Struziak, Darryl A. Colson
  • Patent number: 9644670
    Abstract: A gas bearing within a cylinder is provided. The gas bearing comprises an anti-rotation tab sitting within a key way of the cylinder. Further, the gas bearing comprises a first foil forming an inner loop and an intermediary loop. The inner loop extends in a first direction from a first end to an intermediary portion. The intermediary loop extends from the intermediary to the anti-rotation tab.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: May 9, 2017
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Christopher McAuliffe, Anthony Santiago
  • Patent number: 9631556
    Abstract: A foil bearing includes an outer member (11), and a plurality of foils (13) that are mounted to an inner circumferential surface (11a) of the outer member (11) and directly face the inner circumferential surface (11a) of the outer member (11) in a radial direction without interposition of another member (such as back foils). The foils (13) each include: holding portions (13a, 13b) that are formed at both circumferential ends and held while in contact with the outer member (11); and a body portion (13c) that is formed circumferentially between the holding portions (13a, 13b) and has a bearing surface (A). At least an end portion on one side in a circumferential direction of the body portion (13c) is raised radially inward with respect to the inner circumferential surface (11a) of the outer member (11).
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: April 25, 2017
    Assignee: NTN CORPORATION
    Inventors: Masato Yoshino, Hiroki Fujiwara
  • Patent number: 9568042
    Abstract: The radial foil bearing includes: a top foil disposed facing a rotary shaft; an intermediate foil disposed outside of the top foil in the radial direction thereof; a back foil disposed outside of the intermediate foil in the radial direction; and a cylindrical bearing housing accommodating the top foil, the intermediate foil and the back foil. Engagement recesses are formed on both side surfaces of the bearing housing so as to be opposite to each other. The intermediate foil includes intermediate foil pieces disposed in the circumferential direction of the bearing housing. An engagement-projecting piece engaging with the engagement recess is formed in each intermediate foil piece.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: February 14, 2017
    Assignee: IHI CORPORATION
    Inventor: Naomichi Omori
  • Patent number: 9556899
    Abstract: A journal foil bearing includes a bearing retainer having one slot configured to receive a top foil leading edge tab and another slot configured to receive a top foil trailing edge tab. A backup support structure, integral to the bearing retainer, extends between and is at least partially defined by the slots. The retainer is configured so that, during operation, the trailing edge tab further contacts, at an increased contact pressure, the support structure at a position close to the friction force, thereby minimizing top foil bending stress and improving bearing strength.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: January 31, 2017
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Marshall Saville, Keith Alan Hurley
  • Patent number: 9551375
    Abstract: The radial foil bearing includes: a top foil; an intermediate foil; a back foil; and a bearing housing accommodating the top foil, the intermediate foil and the back foil. The top foil is formed by winding a rectangular metal foil which includes a first uneven portion and a second uneven portion, into a cylindrical shape so as to overlap the first and second uneven portions with each other, wherein the first uneven portion is composed of a projecting portion and a depressed portion formed on one edge of the metal foil, and the second uneven portion is composed of a depressed portion, and a projecting portion formed on another edge of the metal foil. The projecting portions of the first and second uneven portions pulled out near the bearing housing engage with engagement grooves of the hearing housing.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: January 24, 2017
    Assignee: IHI Corporation
    Inventor: Naomichi Omori
  • Patent number: 9534629
    Abstract: A bearing system and method may include a first bearing assembly that may have an inner race. An outer race may be disposed around the inner race and may be rotatable relative to the inner race. A second bearing assembly may be disposed around the first bearing assembly. The second bearing assembly may be an air bearing. The outer race may be engageable with the inner race through the engagement mechanism that acts on the outer race so that the inner and outer races rotate together.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: January 3, 2017
    Assignee: BorgWarner Inc.
    Inventors: Evan Lucas, Christian Longacre, Zachary Ashton, Sean Hastings, Srikar Yellapragada
  • Patent number: 9394945
    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: August 17, 2012
    Date of Patent: July 19, 2016
    Assignee: BorgWarner Inc.
    Inventors: Dietmar Metz, Martin Mueller
  • Patent number: 9394941
    Abstract: This invention provides a turbocharger bearing assembly having foil bearing assemblies (21, 22, 23, 24, 30, 35, 36, 37, 40, 41, 42, 45, 46, 47, 50, 52) supporting conical rotor elements (3, 4, 10, 11, 16, 17, 31, 32).
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: July 19, 2016
    Assignee: BorgWarner Inc.
    Inventor: Keun Ryu
  • Patent number: 9388848
    Abstract: A radial gas foil bearing extending along a rotation axis including a carrier element provided with an opening extending along the axis, further including at least one foil extending circumferentially along a radial inner side of the opening of the carrier element, wherein the foil is attached to the carrier element is provided. In order to enable an easy manufacturing as well as safe operation it is proposed to provide at least one radial through hole in the carrier ring, wherein at least one fixation section of the foil is formed to be inserted into the through hole, wherein the fixation section and the through hole are made such that fixation section becomes by insertion into the through hole accessible from radial outside of the carrier element to be fixed to the carrier element.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: July 12, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Jon Steffen Larsen, Joergen Lyquist
  • Patent number: 9322433
    Abstract: Embodiments of the invention relate to bearing assemblies, bearing apparatuses, and methods of assembling and operating such bearing assemblies and apparatuses. For instance, first bearing assembly and/or the second bearing assembly may include one or more tapered sections, which may facilitate entry of the first bearing assembly into the second bearing assembly.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: April 26, 2016
    Assignee: US SYNTHETIC CORPORATION
    Inventors: S. Barrett Peterson, Jair J. Gonzalez
  • Patent number: 9194422
    Abstract: A foil bearing includes a cylindrical outer member, a shaft inserted on an inner periphery of the cylindrical outer member, and a plurality of leaves arranged at a plurality of positions in a circumferential direction between an inner peripheral surface of the cylindrical outer member and an outer peripheral surface of the shaft. A region including a front end of each of the plurality of leaves serves as a top foil that has a bearing surface, and a region including a rear end of each of the plurality of leaves serves as a back foil that supports, from behind, the top foil of an adjacent one of the plurality of leaves. Any one or both of the front end and the rear end of each of the plurality of leaves are inclined with respect to an axial direction.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: November 24, 2015
    Assignee: NTN CORPORATION
    Inventors: Masato Yoshino, Hiroki Fujiwara
  • Patent number: 9151322
    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: July 24, 2013
    Date of Patent: October 6, 2015
    Assignee: Mohawk Innovative Technology, Inc.
    Inventor: Hooshang Heshmat
  • 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: 9004765
    Abstract: An air foil bearing has a bearing housing having a shaft hole in which a rotary shaft is inserted and a top foil fixed to the shaft hole to support the circumference of the rotary shaft, an air flow path is formed at the top foil by means of a plurality of dams protruding on the inner surface of the top foil, and the air flow path is formed so that air between the top foil and the rotary shaft flows along the circumference of the inner surface of the top foil.
    Type: Grant
    Filed: January 3, 2014
    Date of Patent: April 14, 2015
    Assignee: Korea Institute of Science and Technology
    Inventors: Yong Bok Lee, Se Na Jeong, Bokseong Choe
  • Patent number: 8944686
    Abstract: The present invention relates to a radial foil bearing for supporting a rotary shaft. The radial foil bearing includes a top foil, a back foil, and a bearing housing accommodating the top and back foils. The top foil is formed by winding a rectangular metal foil into a cylindrical shape so that one end of the metal foil is extended out in a tangential direction of a cylinder formed by the metal foil. An engagement groove is formed on an inner circumferential surface of the bearing housing in an axial direction of the bearing housing, and the engagement groove is formed so that a depth direction thereof corresponds to one tangential direction of the cylinder of the top foil. The one end of the top foil engages with the engagement groove.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: February 3, 2015
    Assignee: IHI Corporation
    Inventor: Naomichi Omori
  • 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
  • Publication number: 20150030269
    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: Application
    Filed: September 25, 2014
    Publication date: January 29, 2015
    Inventor: Naomichi OMORI
  • Patent number: 8926182
    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. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: January 6, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Seth E. Rosen, Ronald M. Struziak
  • Patent number: 8920032
    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 3.214 and 3.216 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. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: December 30, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Seth E. Rosen, Ronald M. Struziak
  • 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: 20140270603
    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 3.214 and 3.216 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. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.
    Type: Application
    Filed: April 30, 2013
    Publication date: September 18, 2014
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Seth E. Rosen, Ronald M. Struziak
  • Publication number: 20140270605
    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: Application
    Filed: April 30, 2013
    Publication date: September 18, 2014
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Seth E. Rosen, Ronald M. Struziak
  • Publication number: 20140270604
    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. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.
    Type: Application
    Filed: April 30, 2013
    Publication date: September 18, 2014
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Seth E. Rosen, Ronald M. Struziak
  • Publication number: 20140226925
    Abstract: In order have a leaf type foil bearing that is rotatable with high accuracy and adaptable to higher speed rotation, a foil bearing includes a cylindrical outer member, a shaft inserted on an inner periphery of the outer member, and leaves arranged at a plurality of positions in a circumferential direction between an inner peripheral surface of the outer member and an outer peripheral surface of the shaft. A region including a front end of each of the leaves serves as a top foil that has a bearing surface, and a region including a rear end of each of the leaves serves as a back foil that supports, from behind, the top foil of the adjacent leaf. Any one or both of the front end and the rear end of each of the leaves are inclined with respect to an axial direction.
    Type: Application
    Filed: September 20, 2012
    Publication date: August 14, 2014
    Applicant: NTN CORPORATION
    Inventors: Masato Yoshino, Hiroki Fujiwara
  • Patent number: 8794838
    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 3.214 and 3.216 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: August 5, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Seth E. Rosen, Ronald M. Struziak
  • Patent number: 8783952
    Abstract: A journal bearing including a cylindrical sleeve structure has an anti-rotation slot for receiving a portion of a foil layer. The anti-rotation slot extends radially into the cylindrical sleeve structure, relative to an axis defined by the cylindrical sleeve structure, from said inner diameter surface.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: July 22, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Craig M. Beers, Darryl A. Colson
  • Publication number: 20140185969
    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: Application
    Filed: August 17, 2012
    Publication date: July 3, 2014
    Applicant: BORGWARNER INC.
    Inventors: Dietmar Metz, Martin Mueller
  • Patent number: 8740593
    Abstract: Vane pump mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring is supported by a journal bearing. A relatively low sliding velocity is imposed between the cam ring and the vanes. This permits the use of less expensive and less brittle materials in the pump by allowing the pump to operate at much higher speeds without concern for exceeding vane tip velocity limits.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: June 3, 2014
    Assignee: Eaton Industrial Corporation
    Inventors: Martin A. Clements, Lowell D. Hansen
  • Publication number: 20140147063
    Abstract: The present invention relates to a radial foil bearing for supporting a rotary shaft. The radial foil bearing includes a top foil, a back foil, and a bearing housing accommodating the top and back foils. The top foil is formed by winding a rectangular metal foil into a cylindrical shape so that one end of the metal foil is extended out in a tangential direction of a cylinder formed by the metal foil. An engagement groove is formed on an inner circumferential surface of the bearing housing in an axial direction of the bearing housing, and the engagement groove is formed so that a depth direction thereof corresponds to one tangential direction of the cylinder of the top foil. The one end of the top foil engages with the engagement groove.
    Type: Application
    Filed: January 29, 2014
    Publication date: May 29, 2014
    Inventor: Naomichi OMORI
  • Publication number: 20140147064
    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: Application
    Filed: January 29, 2014
    Publication date: May 29, 2014
    Inventor: Naomichi OMORI
  • Patent number: 8726503
    Abstract: A method of positioning a bearing of a turbomachine in a squeeze film annulus is disclosed. The method includes providing a bearing in which a rotor shaft is disposed and a bearing support mounted about and radially supporting the bearing, with the bearing support at least in part defining the squeeze film annulus. A further step typically includes providing a plurality of centering elements associated with the bearing and bearing support and acting to center the bearing within the squeeze film annulus, with the centering elements provided at radially spaced locations around the bearing. An additional step in the method may include individually machining or shimming the centering elements to adjust the positioning of the bearing in the squeeze film annulus or to impart pre-load to improve the resiliency of the centering elements.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: May 20, 2014
    Assignee: Elliott Company
    Inventors: Brian C. Pettinato, Pranabesh De Choudhury
  • 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: 8651741
    Abstract: A bearing housing of a hydrodynamic foil bearing assembly has an opening for allowing flow of a fluid into the bearing housing. Also included in the a hydrodynamic foil bearing assembly is at least one foil having at least one opening and defining a cylindrical hollow space for receiving a rotating shaft therein. Fluid is supplied from the opening of the bearing housing to a gap between the at least one foil and the rotating shaft through the at least one opening of the at least one foil to form a pressurized fluid film therein.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: February 18, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Vitaly Malinin
  • 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