Centrifugal Patents (Class 384/135)
  • Patent number: 10018183
    Abstract: A rotating system (1), such as a gear system or a bearing supporting system, for a wind turbine is disclosed. The rotating system (1) comprises a housing (2) arranged to substantially enclose the rotating system (1), said housing (2) defining a lubricant drain (5) towards the exterior of the housing (2), and a rotating part (3) accommodated in an interior part of the housing (2) in a manner which allows rotational movements of the rotating part (3) relative to the housing (2), and in such a manner that lubricant can be contained between the housing (2) and the rotating part (3). The housing (2) and/or the rotating part (3) is/are arranged to provide a pumping action forcing lubricant arranged in an interior part of the housing (2) towards the lubricant drain (5) during rotational movements of the rotating part (3) relative to the housing (2). Excess lubricant is quickly and efficiently removed from the rotating part (3) and led to the lubricant drain (5). Thereby a slip stream of lubricant is reduced.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: July 10, 2018
    Assignee: Vestas Wind Systems A/S
    Inventors: Thomas Korsgaard Nielsen, Simon Schjøtt, Jens Demtroder
  • Patent number: 9657595
    Abstract: A bearing unit of a turbocharger may be disposed on an inner side of a space in a center housing and carry axial load of a rotary shaft connecting a turbine wheel, a compressor wheel, and an electric motor. The bearing unit may include a bearing body fastened to a side of the center housing and has a through-hole substantially at a center of the bearing body, and a coupling disposed in the through-hole and on the rotary shaft, having a stepped portion in which the bearing body is inserted, and forming an oil chamber with the bearing body.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: May 23, 2017
    Assignee: Hyundai Motor Company
    Inventors: Kitae Yeom, Jaesik Yang, Sung Won Kim, Tae Won Hwang, Hong-Young Lee
  • Patent number: 8500332
    Abstract: A system is disclosed for use in a rolling mill oil film bearing to remove a laminar flow of oil exiting tangentially from between a rotating sleeve and a fixed bushing surrounding the sleeve. The system comprises confinement surfaces cooperating with the sleeve and the bushing to define an annular chamber arranged to receive the exiting laminar flow of oil. Impellers project into the chamber and are rotatable with and at the velocity of the sleeve to thereby propel the oil around the annular chamber. An outlet communicates tangentially with the annular chamber for removing oil being propelled around the chamber by the rotation of the impellers. The size of the outlet in relation to the volume of oil received in the annular chamber is such that the chamber remains filled with oil during steady state operation of the bearing.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: August 6, 2013
    Assignee: Siemens Industry, Inc.
    Inventors: Thomas C. Wojtkowski, Jr., Peter N. Osgood
  • Patent number: 8342753
    Abstract: A system is disclosed for use in a rolling mill oil film bearing to remove oil exiting from between a rotating sleeve and a fixed bushing surrounding the sleeve. The system comprises an annular chamber arranged to receive the exiting flow of oil. The chamber is isolated from a drainage sump by confinement surfaces including a seal interface defined by a flexible seal in contact with an adjacent rigid component of the bearing. Impellers project into the chamber and are rotable with and at the velocity of the sleeve to rotatively propel oil around the chamber. A discharge conduit communicates tangentially with the chamber and is arranged to receive a pressurized flow of the oil being rotatively propelled around the chamber. A venturi is located in the discharge conduit. A suction conduit connects the venturi to the drainage sump. Oil escaping from the annular chamber past the seal interface into the drainage sump is aspirated by the venturi for removal via the conduit.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: January 1, 2013
    Assignee: Siemens Industry, Inc.
    Inventors: Peter N. Osgood, Thomas C. Wojtkowski, Jr.
  • Patent number: 7134667
    Abstract: A sealing arrangement for turbomachines with a shaft bearing, a throw-off ring and a shaft seal which is assigned to a sealing gap and has a seal housing wherein opposing faces of the throw-off ring and the seal housing form an annular gap for centrifuging out dirt and oil particles.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: November 14, 2006
    Assignee: MTU Aero Engines GmbH
    Inventor: Wolfgang Weiler
  • Patent number: 6435722
    Abstract: An oil-impregnated bearing combination includes an axle tube whose upper end has an upper cap having an opening is secured in a tight fit manner inside the axle tube hole. After a rotor shaft extends through the opening of the upper cap, a retainer is snapped on the shaft. The retainer is provided with an annular wall protruding outward from the opening of the upper cap and rested on a shaft seat. The outer peripheral of the shaft under the retainer is sleeved with an oil-impregnated bearing, and the oil-impregnated bearing is placed in the inner hole of the axle tube in a non-tight fit manner. The lower end of the axle tube is sealed by a lower cap, so that the oil-impregnated bearing is retained between the upper cap and the lower cap, for supporting rotation of the rotor shaft.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: August 20, 2002
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventor: Alex Horng
  • Patent number: 6404087
    Abstract: Disk-drive motor having two hydrodynamnic bearing sections separated with respect to the shaft by an air intervention, each composed of a radial and a thrust dynamic-pressure bearing portion, and in each of which lubricant is retained continuously throughout the radial and thrust bearing portions At least one communicating pathway is formed in the sleeve, axially communicating the thrust faces that are constituents of, and retaining lubricant continuously with, the pair of thrust bearing portions. Via the communicating pathway, the lubricant retained in the two hydrodynamic bearing sections shifts mutually from the one section to the other, such that the radii of curvature of the meniscuses forming the respective boundaries arc equalized. The amount of lubricant held in the bearing sections is accordingly equalized and lubricant leaking out of the radial bearing portions is taken up and re-circulated.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: June 11, 2002
    Assignee: Nidec Corporation
    Inventor: Yoshikazu Ichiyama
  • Patent number: 6196722
    Abstract: It is an object of the present invention to provide a hydrodynamic bearing which is highly reliable and capable of preventing a lubricant contained therein from flowing out of the bearing. In the hydrodynamic bearing, lower and upper end portions of a stationary shaft are properly spaced from a sleeve and a thrust plate, respectively, and an air channel is provided inside the stationary shaft with one end thereof opening to a space defined between an outer circumferential portion of the stationary shaft and the sleeve and with the other end thereof communicating with the outside. Thus, the hydrodynamic bearing has a highly reliable construction which can assuredly prevent the flow-out of the lubricant.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: March 6, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takafumi Asada, Hiroaki Saito, Takao Yoshitsugu, Yasuo Saeki, Katsunori Sakuragi
  • Patent number: 6008557
    Abstract: A bearing for a driving shaft of an electrical machine is lubricated by a lubricant. Located between the bearing and rotating parts arranged on the driving shaft is a seal element for lubricant emerging from the bearing. The seal element is configured in the form of a slinger disk by which lubricant emerging from the bearing is returned to the bearing, thus resulting in a closed lubricant circulation. The slinger disk is produced entirely from an elastic material. Lubricant sent off from the slinger disk is returned directly to the bearing.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: December 28, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Gerd Dornhoefer, Hartmut Nitzsche, Bernd Wieland
  • Patent number: 5558445
    Abstract: A self-contained hydrodynamic bearing unit includes a shaft and a shaft housing defining an opening for receiving the shaft for relative rotation. The shaft and bearing define at least one radial hydrodynamic bearing and an annular thrust bearing, formed as a disk portion extending radially outward of a main cylindrical surface of the shaft which cooperates with an adjacent annular face of the shaft housing. A gap between an outer cylindrical wall of the thrust bearing disk portion and an adjacently facing cylindrical surface of the shaft housing provides a primary annular capillary seal segment. An annular bushing ring extends from the housing radially inwardly to enclose the thrust bearing disk, and cooperates with an adjacent outer face of the thrust bearing disk to provide a secondary containment capillary seal segment. Normally, lubricating liquid is in the bearing unit at the radial hydrodynamic bearing, at the hydrodynamic thrust bearing and in the primary annular capillary seal segment.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: September 24, 1996
    Assignee: Quantum Corporation
    Inventors: Shuo-Hao Chen, Yan Zang, Michael R. Hatch
  • Patent number: 5494355
    Abstract: A bearing assembly includes a shaft rotating about an axis and a bearing being acted upon by a liquid lubricant and supporting the shaft. A device for removing the lubricant from the bearing assembly includes at least one sealing assembly adjacent the bearing. The sealing assembly has a seal surrounding the shaft and a collector chamber disposed between the seal and the bearing. The collector chamber surrounds the shaft and receives the lubricant from the bearing along the shaft. The lubricant is removed from the collector chamber through a drain conduit. According to one embodiment, a funnel protrudes into the collector chamber for collecting the lubricant and removing the lubricant to the drain conduit.
    Type: Grant
    Filed: January 5, 1995
    Date of Patent: February 27, 1996
    Assignee: Siemens Aktiengesellschaft
    Inventor: Detlef Haase
  • Patent number: 5482378
    Abstract: A vacuum motor bearing protection system includes a barrier wall interposed between a motor assembly and a fan assembly. A shaft interconnecting the assemblies is rotatably received within a bearing received by the barrier wall. In order to prevent moisture and debris from attacking the bearing, apertures are position in the top plate of the fan assembly nearest the bearing and in juxtaposition thereto for drawing air away from the bearing and into the fan eye. Accordingly, this scavenging action draws any moisture or debris from the area of the bearing. To assist in the pumping action, the barrier wall, fan top plate, or a spacer interposed therebetween may be provided with vanes positioned and configured to direct moisture laden air to the apertures in the fan top plate and into the fan eye.
    Type: Grant
    Filed: June 22, 1994
    Date of Patent: January 9, 1996
    Assignee: Ametek, Inc.
    Inventors: Nick Vona, Jr., George E. Marsinek
  • Patent number: 5281035
    Abstract: An improvement in the leak proof construction and the rotating shaft attachment means for an oil-containing bearing includes a plurality of oil-storing grooves formed on the oil-containing bearing such that the lubricant oil required by the rotation of the rotating shaft can be received and contained therein. On an outlet portion of the rotating shaft and the oil-containing bearing, there is provided an oil guiding plate which rotates with the rotating shaft. The lubricant oil escaping along the rotating shaft will be expelled by the oil guiding plate into the oil-storing grooves of the oil containing bearing by the centrifugal force generated by the rotation of the oil guiding plate.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: January 25, 1994
    Assignee: Delta Electronics, Inc.
    Inventor: Jansen Lo
  • Patent number: 5246294
    Abstract: A self-lubricating hydrodynamic spindle bearing for support of a spindle of a magnetic disk drive assembly includes a crankcase design which provides large reservoirs for oil storage with an air cover in communication with the ambient environment through an air vents provided by clearance seals formed between respective central passages of housing-sealing endcaps and the shaft. The crankcase reservoir volume is defined within the bearing so that natural body force effects cause the lubricant to be fed into the hydrodynamic bearing. A leak-preventing capillary trap of minimal continuous axial length may be provided at the clearance seal for passive capture of wandering lubricant when the bearing is at rest. Full evacuation of lubricant trapped at the clearance seal is achieved toward the interior of the housing by centrifugal pumping, e.g.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: September 21, 1993
    Assignee: Digital Equipment Corporation
    Inventor: Coda H. T. Pan
  • Patent number: 5221095
    Abstract: An isolator mechanism is provided for use with a machinery housing and a rotatable shaft protruding through the housing. The isolator mechanism comprises a stator ring affixed to the housing and a rotor ring which is attached to the shaft and which nests within the stator. The stator and rotor are so shaped that the stator has a male cylindrical surface, and the rotor has a female cylindrical surface located radially outwardly of the stator male surface. A solid, circumferentially stretchable annular seal member is mounted on the rotor female surface and engages the stator male surface when the rotor and seal member are at rest. However, the deformable seal member is stretched circumferentially by centrifugal force out of engagement with the stator when the rotor and seal member are moving at operating speeds.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: June 22, 1993
    Assignee: Inpro Companies, Inc.
    Inventor: David C. Orlowski
  • Patent number: 5207291
    Abstract: A barrier system for the lubricating oil for the bearings of a centrifugal compressor with labyrinth seals installed in a confined environment, consisting of a disc concentrically rigid with the rotating compressor shaft in the chamber facing the bearing situated on the compressor suction side, in a position between said bearing and the relative suction side labyrinth seal, the disc having an inverted U-shaped rim housing a stator ring rigid with the wall of said chamber and arranged concentric with said shaft, which with said rotating disc forms a small passage continuously fed, and kept filled by the centrifugal effect of said rotating disc, with barrier oil bled from the lubricating oil feed, said stator ring being provided, on that side facing the disc, with a wedge which is inserted into a corresponding cavity in the disc, and with an annular deflector tooth projecting beyond the outer edge of said disc cavity.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: May 4, 1993
    Assignee: Nuovopignone-Industrie Meccaniche e Fonderia S.p.A.
    Inventors: Vasco Mezzedimi, Giampietro F. Aggradi
  • Patent number: 5074567
    Abstract: A unitary structure comprising a mechanical seal for rotating shafts consisting of a single ring member. The ring member has at one end a series of radial grooves in the internal bore and a trough extending across the grooves to an end of the ring. The ring also has at a second end at least one external labyrinth groove extending radially and serving to inhibit contamination. A sloped collection chamber having an expulsion port lies between the inner radial grooves and the external labyrinth groove. A non-metallic, flexible rotor is fitted within the sloped collection chamber whereby free flow across the axial width of the collection chamber is arrested and fluids are directed outwardly towards said expulsion port.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: December 24, 1991
    Inventor: David C. Orlowski
  • Patent number: 4992023
    Abstract: A slinger ring for a vehicle water pump shaft is given a scalloped outer lip, which causes the lip to undulate back and forth past vent holes in the bearing race as the pump shaft rotates. This provides a continual vent hole cleaning and scraping action.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: February 12, 1991
    Assignee: General Motors Corporation
    Inventors: Steven F. Baker, Joseph L. Tengowski, Brent R. Behrman
  • Patent number: 4962937
    Abstract: In the representative embodiment of the apparatus of the invention disclosed herein, a circular fluid deflector with a central opening to receive a pump shaft is arranged with a flat transverse face for facing the seal in the pump housing through which the shaft is extended. Fluid-deflecting surfaces are arranged on the deflector including a peripheral rim having an outwardly-diverging inclined surface and one or more annular ribs coaxially disposed between the central opening and the rim which respectively have surfaces facing the shaft seal so that whenever fluids leaking through the shaft seal strike any of these fluid-deflecting surfaces these fluids will be directed outwardly from the deflector member to provide a fluid screen to divert other leaking fluids that would otherwise pass around the deflector and contact adjacent equipment such as the prime mover for the pump.
    Type: Grant
    Filed: March 21, 1989
    Date of Patent: October 16, 1990
    Inventor: Jack E. Ashenfelder, Jr.
  • Patent number: 4892418
    Abstract: A hydrodynamic bearing device which includes a shaft, a ring-shaped member and a thrust bearing member, with a lubricating material being held in a space defined in the thrust bearing member and the inner peripheral face of the ring-shaped member. The ring-shaped member is formed, in its inner peripheral face, with a taper for feeding the lubricating material into the thrust bearing member based on centrifugal force, by which the lubricating material is prevented from flowing out.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: January 9, 1990
    Assignee: Matsushita Electrical Industrial Co., Ltd.
    Inventors: Takafumi Asada, Jiro Kataoka, Kouji Nakagawa
  • Patent number: 4827166
    Abstract: A water-resistant fan motor has a water spray deflector which includes a closed central portion fan blade and a closed, convex, coaxial deflector between the fan blade and the motor housing. This convex deflector establishes a first small gap between the periphery of the rotatable convex deflector and a portion of the housing substantially at the outer diameter thereof. A second small gap between a portion of the rotor and a portion of the housing is unaligned with the first small gap and an enlarged cavity is in series between the first and second small gaps. This construction establishes a labyrinth for any water spray, and hence inhibits any water spray entering the interior of the motor housing. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications and is not to be construed as a limitation on the scope of the claimed subject matter.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: May 2, 1989
    Inventor: Wayne J. Morrill
  • Patent number: 4820948
    Abstract: A d.c. electric motor has an oil collector located fast on a motor shaft, between a lubricated bearing and a commutator. Collector is of rubber and forms an oil tight seal with the motor shaft so that oil will migrate into a ring portion where the centrifugal force of the rotating motor will retain the oil in the ring. Preferably the collector has an oleophobic coating thereon.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: April 11, 1989
    Assignee: Johnson Electric Industrial Manufactory Limited
    Inventor: Dieter Rogelein
  • Patent number: 4711590
    Abstract: A self-aligning bearing and end shield mount for an electric motor or the like. The bearing mount has a spacer with a hub through which the rotor shaft extends and fingers that seat within an annular locating groove of the rotor shaft for securing the spacer to the shaft. The spacer also has a thrust surface. A spring has a hub portion through which the rotor shaft extends and a ring surrounding the hub with resilient arms therebetween. The spring also has a bearing seat and a thrust plate seat. A self-aligning bearing is seated in a bearing socket in the end shield of the motor housing and in the bearing seat of the spring. A thrust plate is seated within the thrust plate seat of the spring with the thrust surface of the spacer running against a surface portion of the thrust plate.
    Type: Grant
    Filed: December 6, 1985
    Date of Patent: December 8, 1987
    Assignee: Fasco Industries, Inc.
    Inventor: Bryan L. Lakin
  • Patent number: 4619409
    Abstract: A system for disposing of large amounts of infectious hospital waste includes a generally sealed enclosure containing an apparatus for delivery, disintegration, and decontamination of waste materials. A dual conveyor arrangement provides a positive delivery of large waste containers to be disposed to a disintegrator while preventing material from being thrown from the disintegrator. The disintegrator comprises two, large, counter-rotating hammermills capable of effectively disintegrating articles of substantial size. The system enclosure is maintained at a negative pressure and adapted to prevent escape of airborne contamination from the system. A variety of protective features is also incorporated into the system to clear the disintegrator in cases of overload, to avoid power surges upon system start-up, and to effect an orderly shutdown of the system.
    Type: Grant
    Filed: October 9, 1984
    Date of Patent: October 28, 1986
    Assignee: Medical Safetec, Inc.
    Inventors: Allan C. Harper, Joseph H. Wilson, Randall G. McKee, David N. Lasiter
  • Patent number: 4392752
    Abstract: An oil seal for bearing of turbocharger is constructed so as to have an excellent sealing effect in which a lubricating oil flowing through the oil seal is subjected to the centrifugal force in such a way that the lubricating oil is forced to return toward a lubricating oil chamber.
    Type: Grant
    Filed: August 6, 1981
    Date of Patent: July 12, 1983
    Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Masami Shimizu, Junji Yasunobe