Pivoted Fluid Pad Patents (Class 384/117)
  • Patent number: 6413043
    Abstract: An assembly for coupling together in a turbofan engine the guide vane and the inner vane shroud. The assembly includes a bushing positioned within a shroud port for receiving the inner trunnion of the vane. A washer located between the bushing and a trunnion button of the vane provides substantial retaining contact between the bushing and the vane. A shroud retainer affixed to the inner surface of the shroud captures the bushing in the shroud port. The retainer preferably spans a series of shroud sections for as much as about one-half of the entire circumference of the shroud. The combination of the washer and the retainer with significant span reduces movement between the shroud and the vane. Wear on the vane trunnion is therefore reduced and maintenance obligations correspondingly reduced.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: July 2, 2002
    Assignee: General Electric Company
    Inventor: Mark Jeffery Bouyer
  • Patent number: 6379046
    Abstract: A hydrodynamic bearing is constructed having a modular bearing pad support system which provides flexure pivot motion about an axis parallel to the axis of rotation of the supported shaft to provide hydrodynamic performance and a rocking motion about an axis transverse to the axis of rotation of the supported shaft to provide tolerance to misalignment and bending of the shaft.
    Type: Grant
    Filed: November 8, 2000
    Date of Patent: April 30, 2002
    Assignee: KMC, Inc.
    Inventor: Fouad Y. Zeidän
  • Patent number: 6361215
    Abstract: A journal bearing having a working surface for contacting a shaft, and channels provided on the working surface and being configured to collect lubricant and redirect lubricant across the bearing working surface. A method for lubricating a bearing assembly is provided where lubricant is delivered to the working surface of the bearing, the lubricant is collected on the surface and directed to areas of the bearing surface which are in need of lubricant to provide an even coverage of lubrication across a bearing working surface.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: March 26, 2002
    Assignee: Kingsbury, Inc.
    Inventors: Joseph J Wilkes, Ascanio M DeCamillo
  • Patent number: 6351721
    Abstract: A system and method for analyzing part clearance data compares stored design clearance data and tolerance data with actual measured clearance values to determine whether any of the actual clearance values are out of tolerance. Clearance values are measured and input using a digital gauge or like apparatus. The data may be displayed in a spreadsheet along with the design clearance data, and any values that are out of tolerance that therefore require adjustment can be highlighted. Out of tolerance values can be corrected via a manual adjustment or a virtual adjustment.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: February 26, 2002
    Assignee: General Electric Company
    Inventors: Dennis J. Werner, Kevin J. Lord
  • Patent number: 6203202
    Abstract: In order to monitor the function of the sliding block bearing elements in view of the hydrostatically and/or hydrodynamically generated compressed oil film or, respectively, compressed oil cushion, given rotating drums seated on sliding blocks such as, for example, tube mills, and to control the operation in conformity with the result of the monitoring, it is inventively proposed that the lubricating gap thickness, i.e., the distance between the bearing surface of the sliding bearing shoe and the running surface of the rotating drum supported thereon via the lubricating gap or, respectively, the compressed oil film, is directly measured during operation and the rotating drum operation is controlled dependent on this measured quantity.
    Type: Grant
    Filed: July 13, 1999
    Date of Patent: March 20, 2001
    Assignee: KHD Humboldt Wedeg AG
    Inventors: Alexander Hagedorn, Christoph Troeder
  • Patent number: 6200034
    Abstract: True-tilting pad of journal bearing has face with border region including engagement surface and defining pocket with generally longitudinal sidebars and a bottom. The pad has leading and trailing portions, with the face extending generally longitudinally therebetween. The leading and trailing portions can be positioned upstream and downstream, respectively, relative to rotation direction of rotatable shaft having convex surface. The pad is pivotally supported by (e.g., mechanical and/or hydrostatic) pivot and can cooperate with one or more other pads and fluid within housing to hydrodynamically and mechanically support the shaft. The pad tilts free of mechanical engagement with other pads. The leading portion can define an entrance to the pocket and the sidebars can converge along the rotation direction.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: March 13, 2001
    Assignee: WHM Holding Corporation
    Inventor: William H. Miller
  • Patent number: 6170989
    Abstract: A hydrodynamic bearing is constructed having a modular bearing pad support system which provides flexure pivot motion about an axis parallel to the axis of rotation of the supported shaft to provide hydrodynamic performance and a rocking motion about an axis transverse to the axis of rotation of the supported shaft to provide tolerance to misalignment and bending of the shaft.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: January 9, 2001
    Assignee: KMC, Inc.
    Inventor: Fouad Y. Zeidan
  • Patent number: 6079102
    Abstract: True-tilting pad of journal bearing has face with border region including engagement surface and defining pocket with longitudinal sidebars, bottom, and abrupt step. The pad has leading and trailing portions, with the face extending longitudinally therebetween. The portions can be positioned upstream and downstream, respectively, relative to rotation direction of rotatable shaft having convex surface. The pad is pivotally supported by pivot and can cooperate with one or more other pads and fluid within housing to hydrodynamically and mechanically support the shaft. The pad tilts free of mechanical engagement with other pads. The leading portion can define an entrance to the pocket and the sidebars can converge along the rotation direction. The pocket hydrodynamically increases pressure on the convex surface of the shaft during rotation, and generates pressure effecting on the face counteraction force about the pivot and upstream relative to the rotation direction in order to counteract spragging force.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: June 27, 2000
    Assignee: WHM Holdings Corporation
    Inventor: William Miller
  • Patent number: 6050727
    Abstract: Applicant's invention defines an improved tilting pad journal bearing having a shell with an inner surface which is dimensionally coincident with yet slightly larger than the geometry of the outer surface of its bearing pads, said pads provided with ramps on opposite radial edges to engage at least one pad stop, said pad having a conduit for passing lubricant such that when the shaft rotates, a hydrodynamic lubricant film is generated placing a hydrostatic pressure between said pads and said shell, said pressure measured by at least one pressure sensor which in turn provides an indication of direct loading of the bearing by the shaft.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: April 18, 2000
    Assignee: Pioneer Motor Bearing Company
    Inventors: George A. Messmer, Lyle A. Branagan
  • Patent number: 6012386
    Abstract: A bearing control system for a roll with hydrostatic bearings which is mounted by its axle on a bearing block or other equivalent frame member by hydraulically loaded hydrostatic bearing elements. A principal bearing element acts in a principal loading direction and another bearing element is a backup bearing element which acts in a direction opposite to the principal loading direction. The bearing elements include bearing shoes positioned freely around the axle in order to support the axle so that the roll revolves freely in relation to the bearing block or other frame member. The control system feeds a hydraulic pressure medium to the hydrostatic bearing elements so that the roll is displaceable in the principal loading direction, e.g., in the direction of the nip plane, by displacing the axle via the bearing elements.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: January 11, 2000
    Assignee: Valmet Corporation
    Inventors: Juha Lahtinen, Pekka Kivioja, Vesa Nokelainen, Kari Holopainen, Juha Ehrola
  • Patent number: 5795077
    Abstract: The bearing for supporting a rotatable shaft 2 comprises an annular housing 7 around the shaft 2; movable bearing members 6 arranged in the annular housing 7, each bearing member 7 making bearing contact with the rotatable shaft 2 or component 3, circumferential movement of bearing members 6 being prevented by location pins 9 mounted in the housing 7. Inwardly projecting pivot members 8 are located in the housing 7 having a concave surface portion contacting a bearing member 6 such that each bearing member 6 is pivotable about a respective pivot member 8, and/or being of a polymer material.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: August 18, 1998
    Assignee: Welsh Innovations Limited
    Inventor: Richard Gozdawa
  • Patent number: 5772335
    Abstract: True-tilting pad of journal bearing has face with border region including engagement surface and defining pocket with longitudinal sidebars, bottom, and abrupt step. The pad has leading and trailing portions, with the face extending longitudinally therebetween. The portions can be positioned upstream and downstream, respectively, relative to rotation direction of rotatable shaft having convex surface. The pad is pivotally supported by pivot and can cooperate with one or more other pads and fluid within housing to hydrodynamically and mechanically support the shaft. The pad tilts free of mechanical engagement with other pads. The leading portion can define an entrance to the pocket and the sidebars can converge along the rotation direction. The pocket hydrodynamically increases pressure on the convex surface of the shaft during rotation, and generates pressure effecting on the face counteraction force about the pivot and upstream relative to the rotation direction in order to counteract spragging force.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: June 30, 1998
    Assignee: WHM Holding Company
    Inventor: William Miller
  • Patent number: 5772334
    Abstract: A hydrodynamic fluid film bearing in which a plurality of circumferentially spaced bearing elements are provided, defining areas of support for the rotating part of the bearing. At least some of the bearing elements are adjustable during operation to vary lubrication conditions in the fluid film. The bearing elements are of sufficiently high stiffness that the position of the entire bearing surface of each element is essentially independent of the pressure in the fluid film encountered during operation.The bearing allows complete control of the lubrication conditions and can be adjusted for optimum performance over a wide range of speed and load.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: June 30, 1998
    Assignee: British Technology Group Limited
    Inventors: David Walter Parkins, James Keith Martin
  • Patent number: 5743654
    Abstract: A one piece hydrodynamic bearing which can include hydrostatic support features. The pads are supported on a single thin web for pivoting on a support structure which can include one or more beam-like members. The bearings may have hydrostatic and active control attributes and is very attractive in cryogenic applications where it is very difficult to prevent leakage in conventional hydrostatic tilt pad bearings. The hydrostatic feed through the post eliminates this problem completely and prevents the fretting at the pivots common with conventional tilt pad bearings. A cavity provided under a pad support membrane can be used as an active control device. The pressure can cause the bearing set or assembly clearance to be reduced thus providing better damping and centering capability. The preload in the pad can be actively controlled in this manner. The pad has a limiting device to prevent a negative pre-load condition from occurring.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: April 28, 1998
    Assignee: KMC, Inc.
    Inventors: Russell D. Ide, Fouad Y. Zeidan
  • Patent number: 5738447
    Abstract: A bearing assembly for supporting a rotatable member, which includes a bearing casing with an inner surface and a fluid drain outlet, and pads mounted on the inner surface of the casing, is provided. Each pad has a face facing the rotatable member and has a leading edge and a trailing edge with respect to the rotation of the rotatable member. A spray bar is positioned adjacent the leading edge of each of the pads, and the spray bar has a fluid ejecting conduit positioned to forcibly eject lubricating fluid toward the leading edge and onto the pad face. The spray bar also includes a fluid blocking segment adjacent the rotatable member for blocking heated fluid from being carried by the rotation of the rotatable member to the leading edge of the next pad in the direction of the rotation, and a fluid removal segment in fluid communication with the fluid drain outlet.
    Type: Grant
    Filed: April 1, 1997
    Date of Patent: April 14, 1998
    Assignee: Rotating Machinery Technology, Inc.
    Inventor: John C. Nicholas
  • Patent number: 5720558
    Abstract: A tilting bearing pad for use in a turbine engine in accordance with the present invention includes an opening extending between opposing inner and outer surfaces of the pad and a profiled area extending from the opening. More specifically, the opening comprises a feed hole which extends from the outer surface toward the inner surface of the pad and is connected to an axial feed groove which extends to and along the inner surface. The profiled area extends from one side of the axial feed groove towards the trailing edge of the bearing pad along the inner surface. The side of the profiled area facing the trailing edge of the pad may be squared or tapered. The side of the axial feed groove facing the leading edge remains substantially flush with the groove and does not extend towards the leading edge. A turbine engine with the tilting bearing pad as described above also includes two bearing cases, a rotor, and a fluid supply system. The bearing cases are located at opposing ends of the turbine case.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: February 24, 1998
    Assignee: Dresser-Rand Company
    Inventors: Stephen L. Edney, Nyhl M. Austin, George E. Hedrick
  • Patent number: 5716142
    Abstract: A radial journal bearing (5, 6) is indicated, with an interior bearing surface placed facing an exterior bearing surface, where one of the bearing surfaces comprises a slide shoe (7, 8), which has one end with a contact face loaded to contact against the other bearing surface, and where this end is movable in such a manner that the contact against the other bearing surface can be maintained by a relative displacement of the bearing surface at right angles to the direction of the load. Hereby it is achieved that the variation of the leakage between the slide shoe and the opposing bearing surface is essentially reduced, resulting in longer life and greater stability.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: February 10, 1998
    Assignee: Danfoss A/S
    Inventors: Egon Kristensen, Hardy Peter Jepsen
  • Patent number: 5702186
    Abstract: A journal bearing is disclosed with shoe segments. Each shoe segment has a supply groove for even distribution of oil across the shoe surface during shaft rotation. The supply grooves have bleed vents that relieve pressure build-up in the supply groove by bleeding oil out of the supply groove in a substantially circumferential direction. Directing oil in this way prevents the pressurized oil from impinging on any nearby seals and provides enhanced temperature profile characteristics.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: December 30, 1997
    Assignee: Westinghouse Electric Corporation
    Inventors: Louis F. Hackstie, Peter J. Clayton
  • Patent number: 5664888
    Abstract: A bearing for supporting a load for axial and rotational motion relative to a shaft is disclosed as including an outer shell having a cylindrical inner wall supporting a plurality of circumferentially spaced arcuate bearing pads for engaging the shaft. Each bearing pad includes a pair of elastically deformable lateral tip portions arranged for interference fit with the shaft to exert a static preload on the shaft, and a mid portion intermediate the lateral tip portions arranged for clearance fit with the shaft. A plurality of lubricant channels communicate with the shaft through gaps between the separate bearing pads.
    Type: Grant
    Filed: December 26, 1996
    Date of Patent: September 9, 1997
    Assignee: Leica Inc.
    Inventor: Jeffrey M. Sabin
  • Patent number: 5653582
    Abstract: Liquid ring pumps with rotating canisters are supported by at least one radial fluid bearing pad. The bearing fluid is either a gas or a liquid. The radial fluid bearing pads can be of either the hydrodynamic or hydrostatic type. Holes in each bearing pad are used to introduce bearing fluid to the clearance between the rotating canister and the housing of the pump. Each radial bearing pad can be mounted to the housing using a ball joint or a bladder. Access ports formed in the housing provide access to the radial bearing pads. Axial fluid bearings are mounted to the housing using shims or threaded bolts so that the axial position of the axial bearings can be adjusted.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: August 5, 1997
    Assignee: The Nash Engineering Company
    Inventors: Andrew C. Harvey, Richard G. Cadotte, Thomas R. Dardis, Harold K. Haavik, Ellis J. Cooper
  • Patent number: 5634725
    Abstract: A bearing assembly for supporting a rotatable shaft comprises a number of bearing pads supported in a housing and the mutually engaging surfaces of each bearing pad and the housing are two surfaces of closely similar shape.
    Type: Grant
    Filed: May 9, 1996
    Date of Patent: June 3, 1997
    Inventor: Keith I. Chester
  • Patent number: 5603574
    Abstract: A fluid-dampened support for a bearing such as a tilt pad bearing or a rolling element bearing such as a ball bearing, needle bearing, roller bearing and the like. The fluid dampened support includes a network of closely spaced beams which act as structural springs which support the outer race of the roller bearing for movement in any direction. The spring rate or constant of these structural springs can be caused to change after a selected amount of deflection. The amount of deflection needed to cause the change in spring rate can be adjusted to suit the particular application. A liquid is provided in the spaces between the beams to dampen movement of the pads. The damping rate can be made to change with movement of the pads. The structure and space between the beams is designed so as to provide virtually any reasonable damping characteristics.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: February 18, 1997
    Assignee: KMC, Inc.
    Inventors: Russell D. Ide, Fouad Y. Zeidan
  • Patent number: 5593232
    Abstract: An integral pivot pad bushing seal bearing, adapted for sealing about a rotating shaft, includes a carrier ring having a radially inner generally cylindrical surface for providing a fluid seal about the shaft. A plurality of cavities are formed in the carrier ring so as to open in the radially inner generally cylindrical surface. Each cavity contains a pivot pad having a radially inner generally cylindrical pad surface which is substantially flush with the radially inner generally cylindrical surface of the carrier ring. The carrier ring and the pivot pads are contained in the same axial length as a unitary structure and act together to both seal and support the shaft. Each cavity can have a longitudinally extending groove in its radially outermost portion for receiving high pressure fluid to press each pivot pad inwardly toward the shaft. A second groove, in communication with the first groove, can be formed in a cavity end wall to apply high pressure to an axial face of the pivot pad.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: January 14, 1997
    Assignee: Dresser-Rand Company
    Inventor: Martin D. Maier
  • Patent number: 5556208
    Abstract: A hydrodynamic thrust bearing and method of manufacturing the same. The bearing includes spaced planar pads supported on radially extending beams. The beams are connected to a base ring which is preferably circular. The radial beams support a circumferentially central region of the pads, but permit deflection of the circumferential edges of the pads for wedge formation.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: September 17, 1996
    Inventor: Russell D. Ide
  • Patent number: 5549392
    Abstract: The present disclosure concerns resiliently mounted pad type journal bearings. Compensation for lateral movement of a journal due to shifts in loading is achieved by varying the profile of the hydrodynamic wedge between one or more of the bearing pads and the journal. Journal bearings according to the present invention are appropriate for either mono-directional or bi-directional journal rotation.
    Type: Grant
    Filed: May 2, 1995
    Date of Patent: August 27, 1996
    Assignee: Nastec, Inc.
    Inventor: William J. Anderson
  • Patent number: 5547287
    Abstract: A method and bearing construction for inhibiting hot oil carryover in hydrodynamic bearings. The method includes supporting the pads so that they form a hydrodynamic wedge and supplying oil to the entrance of the wedge. The oil flowing through the wedge is pressurized and oil exiting the hydrodynamic wedge is directed away from the adjacent wedge. Oil is then supplied from another source to the adjacent wedge.Various bearing constructions can be used to practice the method of the present invention. These bearing constructions include some form of a scraper to inhibit flow of hot oil. The scraper is located between the trailing edge of one bearing pad and the fluid nozzle passage of an adjacent pad. The scraper may be integrally formed with the bearing pad or it may be separate. The scraper may be pushed toward or away from the shaft using electrical, mechanical, hydraulic or magnetic devices.An alternative form of hydrodynamic bearing including two different types of pads is also disclosed.
    Type: Grant
    Filed: December 7, 1993
    Date of Patent: August 20, 1996
    Assignee: KMC, Inc.
    Inventor: Fouad Y. Zeidan
  • Patent number: 5531523
    Abstract: An adjustable pad bearing for the rotor shaft journal of a steam turbine power system or the like provides a pre-load force on the top half of the journal so as to damp the system and move criticals away from the operating range. An adjustable pad bearing in accordance with the invention provides for maintenance of system vibrations at or below desirable levels. The pre-load force is applied to the top half of the journal as a result of oil or a like viscous fluid collected in a pressure dam in the pad. The position of the pad bearing in relation to the top half of the journal is adjustable to change the magnitude and location of the pre-load force, as well as the pressure dam angular orientation of that force.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: July 2, 1996
    Assignee: Westinghouse Electric Corporation
    Inventor: Rajagopal Subbiah
  • Patent number: 5489155
    Abstract: A one piece hydrodynamic bearing which replicates the function and performance of more costly tilt pad bearings. The pads are supported on a single thin web for pivoting on a support structure which can include one or more beam-like members. The support structure preferably includes a primary support portion, a secondary support portion and a tertiary support portion. The beams allow deflection of the pad by either deflecting or twisting in a torsional mode. The bearing pad support structure may include portions which are fluid dampened. The bearing may be made self lubricating through the provision of a lubricant absorbing and releasing material in the spaces between the bearing pads or within the support structure. The bearings may be made of a wide variety of materials including, plastics, ceramics, powdered metals, composites and metals.
    Type: Grant
    Filed: May 5, 1992
    Date of Patent: February 6, 1996
    Inventor: Russell D. Ide
  • Patent number: 5360273
    Abstract: A hydrostatic journal bearing system for a rotor or shaft includes bearing pads which are self-aligned and self-adjusting. The self-adjusting aspect includes providing for radial movement of the bearing pads. The self-aligning feature includes providing for pivoting of the bearing pads. In one embodiment a pressurizable piston area provides a radial load to establish a substantially constant clearance between the bearing pad and the rotor. Spring preload of the bearing pads, if provided, prevents relative motion between the bearing and shaft, e.g., during transportation and storage.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: November 1, 1994
    Assignee: Aerojet General Corporation
    Inventor: Paul S. Buckmann
  • Patent number: 5304006
    Abstract: A bearing and a shaft and bearing combination for replacing conventional rolling element bearing, washer and lock ring assemblies. The bearing is constructed so that it can be precisely positioned with respect to the shaft in the housing. Additionally, the bearing provides both radial and thrust support so that the need for separate bearings is eliminated. The assembly is ideally suited for use in small high speed low load cooling fans used in computers, peripherals and other office equipment.The shaft includes a radially inward extending groove, preferably conically tapered. The bearing includes a base member, which can include a beam mounted radial bearing, and a number of longitudinal beams extending axially away from the base member. Each of the longitudinal beams supports a bearing pad in a cantilever fashion.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: April 19, 1994
    Inventor: Russell D. Ide
  • Patent number: 5288153
    Abstract: In a tilting pad journal directly lubricated bearing the axially spaced apart sidewalls of the tilting pads are provided with extensions that have an axial space between them and contribute to defining the boundaries of a cool oil infeed well whose other boundaries are radially extending walls of adjacent pads or walls that are defined by slotting the leading ends of the pads. The pads are contained within the circular opening of a supporting ring member which has an oil infeed groove around its periphery. In line with each of the oil infeed wells there is an oil infeed passageway for delivering oil to the shaft surface exposed in the well by means of an interposed row of jets or orifices. Cool oil is fed into the wells, such that the interface between the bearing pad and the shaft, which only has oil from the well available to it, necessarily runs on cooler oil.
    Type: Grant
    Filed: January 4, 1993
    Date of Patent: February 22, 1994
    Assignee: Delaware Capital Formation, Inc.
    Inventor: Willis W. Gardner
  • Patent number: 5284392
    Abstract: A hydrodynamic thrust, journal or combined radial and thrust bearing and methods of manufacturing the same. The bearing includes a bearing pad structure that may change shape and move in any direction (six degrees of freedom) to optimize formation of a converging wedge for hydrodynamic operation, equalization of load on the bearing pads in thrust bearings and to adjust for any shaft misalignment. The bearing pad may be formed so as to contact the shaft in the installed state and to deflect under fluid film pressure. The shape of the pads may be altered to achieve desired deformations under load. The pads are supported by a support structure which can include one or more beam-like members. The support structure preferably includes a primary support portion, a secondary support portion and a tertiary support portion.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: February 8, 1994
    Inventor: Russell D. Ide
  • Patent number: 5271676
    Abstract: The bearing pedestal for the rotating shaft 12 includes journal and axial thrust bearings 16 and 26, respectively. Both of the journal and thrust bearings have passages 70 and 80, respectively, and recesses 74 and 82 in the respective pad faces for flowing high pressure lubricant between the pads and the shaft to displace the shaft and pads relative to one another to minimize the required breakaway torque and metal-to-metal contact. Each thrust bearing includes a plurality of circumferentially spaced pads 26 and lubricant directors 30 between the pads. The lubricant director includes a rib 34 extending generally tangentially and radially outwardly to channel lubricant from a preceding pad to a succeeding pad in the direction of shaft rotation and to channel the lubricant for flow tangentially from the thrust bearing into an annular cavity 39 for return to sump 42.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: December 21, 1993
    Assignee: General Electric Company
    Inventors: Richard K. Keck, Blake Wilson, Steve Hendricks, Thomas R. Byrne
  • Patent number: 5222815
    Abstract: A hydrodynamic thrust, journal or combined radial and thrust bearing and methods of manufacturing the same. The bearing includes a bearing pad structure that may change shape and move in any direction (six degrees of freedom) to optimize formation of a converging wedge for hydrodynamic operation, equalization of load on the bearing pads in thrust bearings and to adjust for any shaft misalignment. The bearing pad may be formed so as to contact the shaft in the installed state and to deflect under fluid film pressure. The pad is separated from the support member by a support structure which includes one or more beam-like members. The support structure preferably includes a primary support portion, a secondary support portion and a tertiary support portion. The beams allow deflection of the pad by either deflecting or twisting in a torsional mode. The bearing pad support structure may include portions which are fluid dampened.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: June 29, 1993
    Inventor: Russell D. Ide
  • Patent number: 5215384
    Abstract: A squeeze film damper bearing (100) has the means of automatically centering itself from the force associated with lateral shaft vibration. It utilizes a floating ring (108) positioned between a housing (102) and a cage (106) with O-rings (115, 116, 130, 131) positioned between adjacent parts to maintain proper clearances. Oil is introduced into the clearances to serve as a damping medium. Squeeze film damping action occurs in the clearances when the force associated with lateral shaft vibration is transmitted from the shaft (120) through the radial bearing (114) to the damper oil films. The mating cylindrical surfaces between the flowing ring (108) and housing (102) have a common longitudinal axis 100a which is inclined with respect to the longitudinal shaft centerline 120a by an angle (122) which provides the means for the floating ring (108) to reposition itself so that it can assume a centered position with respect to the housing (102) and the cage (106) when subjected to lateral forces.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: June 1, 1993
    Assignee: Dresser-Rand Company
    Inventor: Martin D. Maier
  • Patent number: 5137373
    Abstract: A hydrodynamic thrust, journal or combined radial and thrust bearing and methods of manufacturing the same. The bearing includes a bearing pad structure that may change shape and move in any direction (six degrees of freedom) to optimize formation of a conversion wedge for hydrodynamic operation, equalization of load on the bearing pads in thrust bearings and to adjust for any shaft misalignment. The bearing pad may be formed so as to contact the shaft in the installed state and to deflect under fluid film pressure. The pad is separated from the support member by a support structure which includes one or more beam-like members. The support structure preferably includes a primary support portion, a secondary support portion and a tertiary support portion. The beams allow deflection of the pad by either deflecting or twisting in a torsional mode. The bearing pad support structure may include portions which are fluid dampened.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: August 11, 1992
    Inventor: Russell D. Ide
  • Patent number: 5112143
    Abstract: A hydrodynamic bearing and methods of manufacturing the same. The bearing includes a bearing pad structure that may change shape and move in any direction (six degrees of freedom) to form a converging wedge for hydrodynamic operation, and to adjust for any shaft misalignment. The pad is separated from the support member by one or more beam-like members the beams extend substantially parallel to the plane of the face of the pad. The beams allow deflection of the pad by either deflecting or twisting in a torsional mode. The bearings may be made of a wide variety of materials including, plastics, ceramics, powdered metals, composites and metals. The bearings may be manufactured by injection molding, casting, powdered metal die casting, extrusion, electric discharge or laser cutting.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: May 12, 1992
    Inventor: Russell D. Ide
  • Patent number: 5102236
    Abstract: A hydrodynamic thrust, journal or combined radial and thrust bearing and methods of manufacturing the same. The bearing includes a continuous bearing surface and support structure which supports the surface such that the surface may change shape and move in any direction (six degrees of freedom) to optimize formation of a converging wedge for hydrodynamic operation, equalization of load across the bearing surface in thrust bearings and to adjust for any shaft misalignment. The support structure can include a repeating series of support structure portions each including a fully rigid portion a partially rigid portion and connecting portions connecting the spaced portions. Alternatively, the support structure can include a spaced series of deflectable ears which are arranged such that the continuous surface deforms when the ear portions are deflected. The bearing may also include an additional support portion which includes one or more beam-like or membrane members.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: April 7, 1992
    Inventor: Russell D. Ide
  • Patent number: 5066144
    Abstract: A hydrodynamic thrust, journal or combined radial and thrust bearing and methods of manufacturing the same. The bearing includes a continuous bearing surface and support structure which supports the surface such that the surface may change shape and move in any direction (six degrees of freedom) to optimize formation of a converging wedge for hydrodynamic operation, equalization of load across the bearing surface in thrust bearings and to adjust for any shaft misalignment. The support structure can include a repeating series of support structure portions each including a fully rigid portion a partially rigid portion and connecting portions connecting the spaced portions. Alternatively, the support structure can include a spaced series of deflectable ears which are arranged such that the continuous surface deforms when the ear portions are deflected. The bearing may also include an additional support portion which includes one or more beam-like or membrane members.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: November 19, 1991
    Inventor: Russell D. Ide
  • Patent number: 5054938
    Abstract: A hydrodynamic thrust, journal or combined radial and thrust bearing which may be mounted within a sealed housing assembly which can be, for example, be used to replace rolling element bearings. The bearing can be designed for mounting to either the shaft or housing. If mounted for rotation with the shaft, the bearing pads move relative to a smooth support surface. The bearing includes a bearing pad structure that may change shape and move in any direction (six degrees of freedom) to optimize formation of a converging wedge for hydrodynamic operation, equalization of load on the bearing pads in thrust bearings and to adjust for any shaft misalignment. The bearing pad may be formed so as to contact the shaft in the installed state and to deflect under fluid film pressure. The pad is separated from the support member by a support structure which includes one or more beam-like members. The support structure preferably includes a primary support portion, a secondary support portion and a tertiary support portion.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: October 8, 1991
    Inventor: Russell D. Ide
  • Patent number: 5033871
    Abstract: A hydrodynamic bearing constructed entirely of non-newtonian fluidic materials such as rubber, plastic and the like. The bearing is extrudable and includes a bearing pad support structure and a plurality of bearing pads formed with bearing pad support structure. The bearing pads may be formed of a material which is softer than the support structure. The bearing may also include a number of deflection control members fused to the bearing pads and/or the bearing pad support structure.The method of making the bearing inlcudes the steps of extruding one or more materials to form an uncured tubular extrusion, curing the tubular extrusion, cutting the tubular extrusion into bearing segments and sizing the bearing segments by machining the individual segments to the desired inner and outer diameters.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: July 23, 1991
    Inventor: Russell D. Ide
  • Patent number: 5030015
    Abstract: A fluid bearing assembly for a shaft comprising a plurality of rigid shells circumferentially spaced around the shaft. Each shell is provided with a profiled portion adjacent said shaft which in operation acts to provide an air cushion upon which the shaft rotates and a profiled end portion which prevents the shells moving radially inward beyond a predetermined point whilst allowing said shells to move radially outwardly.
    Type: Grant
    Filed: March 8, 1989
    Date of Patent: July 9, 1991
    Assignee: Rolls-Royce plc
    Inventors: Alan D. Baker, Peter M. Leslie
  • Patent number: 4927275
    Abstract: The hydrodynamic bearing assembly may be either a journal bearing or a thrust bearing. Bearing pads are located adjacent a shaft when a journal bearing or adjacent a collar on a shaft when a thrust bearing. The bearing pads are located on equalizing pads, two bearing pads for each equalizing pad. An elastomeric layer is disposed between the bearing pads and the equalizing pads.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: May 22, 1990
    Assignee: The Torrington Company
    Inventor: James L. Lawson
  • Patent number: 4919549
    Abstract: The spindle has a sleeve about a fixed shaft. Swing-type bearing pads are attached to the fixed shaft. The bearing pads are lubricated by flowing a lubricant through primary and secondary lubricating holes located in the fixed shaft.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: April 24, 1990
    Assignee: The Torrington Company
    Inventors: James L. Lawson, Ronald A. Peterson
  • Patent number: 4864703
    Abstract: In a press roll having a stationary support member and a roll shell rotatable about the stationary support member and movable in a predeterminate support or pressing direction throughout the entire width of the press roll, the provision of guide devices for the rotatable roll shell enable accomplishing an axial and radial guiding of the rotatable roll shell with minimum friction and without using roller bearings. These guide devices comprise hydrostatic support or pressure elements which can be adjusted in the predeterminate support or pressing direction. Bearing surfaces of the hydrostatic support elements and running or travel surfaces at the roll shell are spherically designed, for instance provided in mirror-image relationship to one another at both ends of the press roll, or at only one end thereof, or at the central or intermediate region of the press roll.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: September 12, 1989
    Assignee: Sulzer-Escher Wyss AG
    Inventors: Mario Biondetti, Wolf-Gunter Stotz
  • Patent number: 4815865
    Abstract: The bearing described comprises a bearing housing (1); a cylindrical outer race (2) for pivoting segments; pivoting segments inserted into said outer race and distributed around its circumference; and a lubricant feed system (4). The pivoting segments (3) have, on the shaft side, a sliding surface (5) with a transverse groove (6) for the lubricant supply on the stage of its sliding surface (5) which is opposed to the direction of movement of the shaft and one the other side a rocking surface (8), the radial cross-section of which corresponds to the sector of the circle having a radius which is smaller than the radius of the cylindrical outer race of the pivoting segments. Furthermore, the pivoting segments form, on both sides of the rocking surface (8) a gap (10, 11) in relation to the cylindrical outer race (2), the gap (10, 11) tapering off in a manner which matches that of the rocking surface (8).
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: March 28, 1989
    Assignee: Braunschweiger Huttenwerk GmbH
    Inventor: Paul Gerling
  • Patent number: 4743125
    Abstract: An aerodynamic slide bearing which uses air as a lubricant. A shaft is supported on substructures distributed about its circumference, which exhibit predetermined elasticity and dampening behavior. A dampening chamber is located between each substructure and an outer casing to give the aerodynamic slide bearing requisite dampening characteristics. Because of the modular design, the aerodynamic slide bearing is relatively insensitive to shifting of the shaft.
    Type: Grant
    Filed: December 1, 1986
    Date of Patent: May 10, 1988
    Assignee: Kloeckner-Humboldt-Deutz AG
    Inventors: Uwe Dammel, Bernd Domes
  • Patent number: 4676668
    Abstract: A hydrodynamic bearing is disclosed in which there are a plurality of bearing pads that each have a face member and a support member, the pad being separated from the support member by at least one leg-like ligament. Each leg-like ligament is arranged at an angle to the pad face to permit the pad to rock for shaft alignment and may be provided with a dog leg portion to permit movement of the pad in the direction of the load to compensate for unequal loads.
    Type: Grant
    Filed: April 24, 1986
    Date of Patent: June 30, 1987
    Inventor: Russell D. Ide
  • Patent number: 4643592
    Abstract: Unwanted vibrations in rotating machinery are controlled from an "active" point of view, meaning, that certain parameters, and thereby vibrations, can be controlled while the machine is operating. This is accomplished from the theoretical knowledge known about rotor dynamics, mechanical vibrations, automatic controls, fluid dynamics, and bearing design theory to produce an active remedy to fundamental vibration problems. From the known information about the critical speeds of a machine and while the speed transients are occuring, active controls cause these critical speeds to be made variable and always away from the actual running speed. By this means, the machine does not have to "run through" the critical speeds but rather, the critical speeds are jumped over by control of certain parameters. This approach is novel but may be accomplished by several different techniques, of which a variety are presented herein.
    Type: Grant
    Filed: November 9, 1984
    Date of Patent: February 17, 1987
    Inventors: David W. Lewis, James W. Moore, Julien LeBleu, Jr.
  • Patent number: 4636095
    Abstract: In a plain bearing, at least one adapter segment is used which includes a bearing body cooperating with an adapter piston to define a pressure chamber therebetween. The pressure chamber is connected with the lubricant gap extending between the plain surface of the bearing body and the shaft to be supported so that the pressure as exerted by the shaft and prevailing in the lubricant gap is deviated to the pressure chamber so that oscillations of the shaft can be automatically controlled.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: January 13, 1987
    Assignee: Glyco-Metall-Werke Daelen & Loos GmbH
    Inventor: Paul Gerling