Axial Thrust Balancing Means For Rotary Pump And Motor Patents (Class 417/365)
  • Patent number: 10975761
    Abstract: The present invention relates to a compression device driven by an electric machine, for which the rotor (1) comprises a rotor shaft (31), a cylindrical magnet (34), and a non-magnetic shrink ring (33). According to the invention, the rotor shaft (31) includes a bore (36) for inserting one end of the compressor shaft (3) to unitize the two shafts.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: April 13, 2021
    Assignee: IFP ENERGIES NOUVELLES
    Inventors: Misa Milosavljevic, Thomas Valin, Fabrice Le Berr, Stephane Venturi, Benjamin Gaussens, Julien Boisson, Abdenour Abdelli, Luca Favre
  • Patent number: 10948956
    Abstract: In the embodiments of the present disclosure, a device having time division multiplexing capability of heat dissipation is provided, including: a first component and a second component arranged in different orientations; and a heat sink arranged to guide an air flow flowing through the heat sink to the first component and the second component respectively during different time periods. Therefore, the device having time division multiplexing capability of heat dissipation of the present disclosure may reduce the number of heat sinks in the device and thus, reduce the overall size of the device.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: March 16, 2021
    Assignee: Dell Products L.P.
    Inventors: Haifang Zhai, Hendry Xiaoping Wu, David Dong, Yujie Zhou
  • Patent number: 10927844
    Abstract: A machine including: a main frame including at least one functional element and one control unit; an air compressor or water pump integrated in the main frame, including a frame in which are mounted a stator, a rotor interacting with the stator and including a shaft, at least one turbine carried by the shaft, a fluid-supply channel to the turbine, and an outlet channel for compressed fluid, the shaft being mounted rotatably on the frame about an axis by first and second bearings, including respectively first and second spherical elements provided on respective first and second ends of the shaft and centered relative to the axis of the shaft, and respective first and second housings provided in the frame centered relative to the axis of the shaft and to support the respective first and second spherical elements.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: February 23, 2021
    Assignee: Belenos Clean Power Holding AG
    Inventor: Rexhep Gashi
  • Patent number: 10874780
    Abstract: In one embodiment of the present invention, an implantable blood pump includes a housing defining a flow path, a rotor positioned within the flow path, and a motor including a stator, positioned outside of said housing, the stator including a length of silver wire, wherein the silver wire is not positioned within a hermetically sealed compartment once the blood pump is ready for implantation into a patient in need thereof. The present invention may also include a method of implanting the implantable blood pump including the step of implanting the blood pump within the patient and within or adjacent to the vasculature.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: December 29, 2020
    Assignee: HeartWare, Inc.
    Inventor: Jeffrey A. Larose
  • Patent number: 10683888
    Abstract: A hydrodynamic bearing assembly includes a first member including a first engaging surface. The first member is stationary in a non-operating mode of the bearing assembly and rotates about an axis in an operational mode of the bearing assembly. The first member includes a first bore and a shaft positioned within the first bore and including an end surface. The hydrodynamic bearing assembly also includes a second member including a second bore and a second engaging surface positioned adjacent the first engaging surface. The second member is stationary in both the non-operating mode and the operational mode of the bearing assembly. The hydrodynamic bearing assembly further includes a spacer member positioned within the second bore and is configured to engage the first member to define a first gap between the first engaging surface and the second engaging surface in the non-operational mode.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: June 16, 2020
    Assignee: REGAL BELOIT AMERICA, INC.
    Inventors: Matthew J. Turner, Greg Heins, Mark Thiele, Jason Jon Kreidler
  • Patent number: 10495099
    Abstract: A multistage centrifugal pump (1) has impellers (9) arranged on a common shaft (8), which is rotatably arranged within a pump casing (2-4). One end of the shaft (8) is led out of the casing (2-4) for connection to a drive motor and another shaft end (15) is rotatably mounted in the pump casing (2-4). The shaft end (15) which is mounted within the pump casing (2-4) is subjected to a counter-force which is produced by way of pressure subjection via a conduit connection to a delivery side of the pump. An axial seal (11) is provided on the shaft end (15) arranged within the pump casing (2-4). The rotating part of the axial seal is led on the shaft end and the non-rotating part is led, axially movably, within the pump casing (2-4). A sealing arrangement is provided between the pump casing and the axially movably mounted part.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: December 3, 2019
    Assignee: GRUNDFOS HOLDING A/S
    Inventors: Erik Bundesen Svarre, John Frigård Nielsen
  • Patent number: 10392763
    Abstract: A multipurpose blower assembly for stimulating flows in underwater environments, which includes a lower assembly connecting to an upper assembly by a rotating shaft and a mount post for connecting the blower assembly to a supportive structure near a water body and supporting the lower assembly below and the upper assembly above the water body's surface. The lower assembly includes a lower bracket for supporting a blower motor, whereas the upper assembly includes a top plate for mounting an electrical gear motor having an output shaft connecting to the rotating shaft and a system controller having a microcontroller communicatively coupled to logic circuits for controlling operation of the electrical gear motor for rotation of the lower assembly relative to the upper assembly and a linear actuator to move upward and downward the lower bracket to effect angular positioning of the blower motor.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: August 27, 2019
    Assignee: DC Lien
    Inventor: Martin William Stone
  • Patent number: 10090545
    Abstract: A structure of a fuel cell system and a controlling method thereof are provided. The structure of the fuel cell system includes a flow sensor that is configured to detect a flow of air introduced into the fuel cell system and an air compressor that is configured to compress the introduced air and has an air foil bearing to maintain minimum driving revolutions per minute or greater. Additionally, the system includes a flow adjuster that is connected to the fuel cell system. Accordingly, since an amount of air corresponding to a required amount of air of the fuel cell system is supplied by limiting or recirculating an excessive air supply while securing durability and durability of abrasion of the air compressor to which the air foil bearing is applied, a dry phenomenon of the fuel cell system including a stack due to the excessive supply of air is prevented.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: October 2, 2018
    Assignee: Hyundai Motor Company
    Inventors: Hyuck Roul Kwon, Kyoung Ku Ha, Hyun Yoo Kim, Chang Ha Lee
  • Patent number: 9989064
    Abstract: A rotating machine including a rotor operable to rotate about a centerline axis and subjected to axial thrust loads along the centerline axis during operation; a balance piston engaged with the rotor; a stator positioned around the balance piston and the rotor wherein a fluid passageway extends between the internal face of the stator and the external face of the balance piston; the fluid passageway including at least one cavity. A balance piston for a rotating machine including at least two segments arranged with a shift in diameter between each other.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: June 5, 2018
    Assignee: OneSubsea IP UK Limited
    Inventors: Knut Harald Klepsvik, Åsmund Valland
  • Patent number: 9453396
    Abstract: An oil well pumping apparatus for pumping oil from a well to a wellhead provides a tool body that is sized and shaped to be lowered into the production tubing string of the oil well. A working fluid is provided that can be pumped into the production tubing. A flow channel into the well bore enables the working fluid to be circulated from the prime mover via the production tubing to the tool body at a location in the well and then back to the wellhead area. A pumping mechanism is provided on the tool body, the pumping mechanism includes upper and lower impeller devices. The upper impeller device is driven by the working fluid. The lower impeller device is rotated by the upper impeller device. Each upper and lower impeller devices are connected with a shaft. A specially configured flow diverter directs the working fluid to an impeller blade in between the top and bottom of an upper impeller device.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: September 27, 2016
    Inventor: Raymond C. Davis
  • Publication number: 20150118075
    Abstract: The present invention provides a method and apparatus of inhibiting a thrust bearing capacity of a compression system from being exceeded during a surge event in which a thrust bearing is biased with a biasing force to increase the thrust bearing overload margin between the capacity of thrust bearing to absorb axial forces and the greatest force produced during the surge event. This biasing force can be produced by appropriately sizing the high pressure seal on the side of the impeller opposite to the inlet of a compressor of the compression system so that the back disk force produced in the high pressure region of the high pressure seal and the low pressure region located inwardly of the high pressure region creates the desired bias force value and direction.
    Type: Application
    Filed: January 5, 2015
    Publication date: April 30, 2015
    Inventors: John H. Royal, Michael J. Stanko
  • Publication number: 20150118067
    Abstract: A well fluid pump assembly includes a rotary pump having a rotatable pump shaft. A motor is cooperatively engaged with the pump shaft for rotating the pump shaft. An upthrust module has an upthrust module housing having a lower end secured by a threaded engagement to an upper end of the pump. An upthrust module shaft is rotatably mounted in the housing and has a lower end in engagement with an upper end of the pump shaft for transferring upthrust on the pump shaft to the upthrust module shaft. An upthrust base is stationarily mounted in the housing. An upthrust runner is mounted to the upthrust module shaft for rotation therewith and located below the upthrust base. The upthrust runner engages the upthrust base to transfer to the housing upthrust applied to the upthrust module shaft from the pump shaft.
    Type: Application
    Filed: October 29, 2014
    Publication date: April 30, 2015
    Inventors: Larry N. Childs, Leslie C. Reid
  • Patent number: 9017043
    Abstract: An apparatus, system and method for sealing an electrical submersible pump assembly are described. An electric submersible pump (ESP) system for pumping solid-laden fluid comprises a thrust chamber of an ESP seal section, the thrust chamber sealed from well fluid on a downstream side by a stationary sand barrier and on an upstream side by a mechanical seal, the thrust chamber further comprising, a rotatable shaft extending axially through the thrust chamber, a head tubularly encasing the thrust chamber and threadedly coupled to a centrifugal pump intake, and a diamond-coated hydrodynamic bearing set inside the thrust chamber, wherein well fluid enters and exits the chamber through cross-drilled apertures in the head of the chamber, and wherein the well fluid forms a hydrodynamic film between the bearing set.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: April 28, 2015
    Assignee: Summit ESP, LLC
    Inventors: Larry Parmeter, Brett Leamy, John Vanderstaay Kenner, David Lunk, Keith Johnson, Thomas John Gottschalk
  • Publication number: 20150023815
    Abstract: An electrical submersible pump assembly includes a centrifugal pump having impellers and diffusers. A thrust runner is coupled to a motor shaft for rotation along with the impellers. The runner receives thrust from at least one of the impellers and transfers the thrust to a bushing non rotatably mounted in one of the diffusers. The bushing has a thrust transferring end adjacent a thrust receiving shoulder in the diffuser. The bushing is axially movable in the receptacle. An annular spring located between the thrust receiving shoulder in the receptacle and the thrust transferring end of the bushing urges the bushing away from the thrust receiving shoulder.
    Type: Application
    Filed: July 19, 2013
    Publication date: January 22, 2015
    Inventors: Steven K. Tetzlaff, Dan L. Adams, Dewayne May
  • Patent number: 8905728
    Abstract: Rotodynamic pumps having an inner drive permanent magnet coupling disposed inside an impeller are provided. The impeller has a casing having a pumping region generally in a pumping plane that is perpendicular to the rotational axis of the impeller and aligned with a permanent magnet coupling that includes outer magnets that are connected to the impeller and at least partially aligned with the pumping region of the impeller, and inner magnets that are connected to an inner magnet ring and are axially aligned with the outer magnets. A canister is sealed to the casing and separates the outer magnets from the inner magnets.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: December 9, 2014
    Assignee: Peopleflo Manufacturing, Inc.
    Inventors: William R. Blankemeier, Radosav Trninich
  • Patent number: 8905729
    Abstract: Rotodynamic pumps having an inner drive permanent magnet coupling disposed inside an impeller are provided. The impeller has a casing having a pumping region generally in a pumping plane that is perpendicular to the rotational axis of the impeller and aligned with a permanent magnet coupling that includes outer magnets that are connected to the impeller and at least partially aligned with the pumping region of the impeller, and inner magnets that are connected to an inner magnet ring and are axially aligned with the outer magnets. A canister is sealed to the casing and separates the outer magnets from the inner magnets.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: December 9, 2014
    Assignee: PeopleFlo Manufacturing, Inc.
    Inventors: William R. Blankemeier, Radosav Trninich
  • Patent number: 8894387
    Abstract: An axial flow pump for a blood circulating pump for the circulation of blood, the rotor the rotor being constructed and arranged to impel blood in a downstream direction upon rotation of the rotor about its axis in a forward circumferential direction. The rotor is provided with hydrodynamic thrust bearing surfaces, each such thrust bearing surface being constructed and arranged to apply a hydrodynamic force to the rotor with a component of the force in the downstream direction upon rotation of the rotor in the forward circumferential direction.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: November 25, 2014
    Assignee: HeartWare, Inc.
    Inventor: Daniel G. White
  • Patent number: 8834133
    Abstract: Device for pumping fluid located under conditions of high ambient temperature and pressure which must deliver at high pressure including a hydraulic delivery pump (11) linked to a hydraulic motor (40), characterized in that the hydraulic motor (40) is connected to the hydraulic delivery pump (10) by a shaft (41), the shaft (41) passing through a leaktight rotating seal (50) which separates the hydraulic fluid (42) returned from the hydraulic motor (40) from the lubricating fluid (5) for the hydraulic pump (10).
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: September 16, 2014
    Assignee: BP Corporation North America Inc.
    Inventor: Louis-Claude Porel
  • Patent number: 8827661
    Abstract: A blood pump apparatus includes a housing having a blood inlet port and blood outlet port, a pump unit including an impeller that rotates within the housing, and an impeller rotational torque generation section. The housing includes a plurality of magnetic members embedded between the impeller and the impeller rotational torque generation section for transmitting a magnetically attractive force generated by the impeller rotational torque generation section to an impeller body. The pump device includes a non-contact bearing mechanism for rotating the impeller without contacting with the inner surface of the housing when the impeller is rotated by the impeller rotational torque generation section.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: September 9, 2014
    Assignee: Thoratec Corporation
    Inventor: Takehisa Mori
  • Publication number: 20140186199
    Abstract: Disclosed herein is an electric blower including: an impeller; a driving module including a rotor part coupled to the impeller in order to driving the impeller and a stator part, the rotator part including a magnet and the stator part including an armature formed of a core positioned so as to face the magnet and a coil; a motor housing having the driving module mounted thereon; and a control module mounted on the motor housing and controlling the driving module.
    Type: Application
    Filed: December 27, 2013
    Publication date: July 3, 2014
    Inventors: Sung Tai JUNG, Yong Wan CHO, Sang Ho SEO, Myung Geun OH, Hee Soo YOON
  • Publication number: 20140154111
    Abstract: A sealed compressor of the present invention comprises a sealed container (101) accommodating an electric component (105) and a compression component (106) and storing lubricating oil (102); wherein the compression component (106) includes a shaft (110) including a main shaft section (111), a main bearing unit (120), and a thrust ball bearing (132); wherein the main shaft section (111) is provided with a first oil feeding passage (150) to transport the lubricating oil (102); the thrust ball bearing (132) includes a cage (133), balls (134), an upper race (135) and a lower race (136), and the thrust ball bearing (132) is provided with a second oil feeding passage (160) communicated with the first oil feeding passage (150) and configured to feed the lubricating oil (102) to the raceway groove provided in at least one of the upper race (135) and the lower race (136), and a discharge passage (180) through which the lubricating oil (102) is discharged.
    Type: Application
    Filed: March 15, 2013
    Publication date: June 5, 2014
    Inventors: Hironari Akashi, Terumasa Ide, Kousuke Tsuboi, Kiwamu Watanabe, Hidenori Kobayashi, Makoto Katayama, Yasushi Hayashi
  • Publication number: 20140140867
    Abstract: This variable speed scroll compressor includes a closed casing including a low pressure volume and a high pressure volume, and an electric motor arranged in the low pressure volume and including a rotor and a stator, the rotor including permanent magnets, the stator including a stator core provided with a plurality of radially extending tooth portions and with a plurality of slots formed between the radially extending tooth portions, and stator windings each wound on the radially extending tooth portions. Each stator winding is wound around a respective tooth portion and includes winding portions extending respectively in the slots formed on each side of the respective tooth portion.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 22, 2014
    Inventors: Patrice BONNEFOI, Gael MELDENER
  • Publication number: 20140140866
    Abstract: This refrigeration compressor includes an electric motor having a stator and a rotor provided with an axial through passage, a compression unit adapted for compressing refrigerant, and a drive shaft adapted for driving the compression unit, the drive shaft extending into the axial through passage of the rotor. The rotor is slide-fitted on the drive shaft.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 22, 2014
    Inventors: Jean Michel PFISTER, Zhou XUEYOU, Patrice BONNEFOI, Gael MELDENER
  • Publication number: 20140140865
    Abstract: A turbocharger includes: a thrust bearing fixed to a turbocharger main body; and a supply oil passage provided in the turbocharger main body to the thrust bearing. The thrust bearing includes: an insertion hole in which to insert the turbine shaft; pressure receiving portions displaced from one another in phase in a rotational direction of the turbine shaft, and each configured to form an oil film between the pressure receiving portion and the thrust collar to receive a thrust load by use of oil film pressure; and intervening portions each located between two of the pressure receiving portions adjacent in the rotational direction of the turbine shaft, and being further away from the thrust collar than the pressure receiving portions. The intervening portion vertically under the insertion hole at least partially has a surface further away from the thrust collar than the other intervening portions.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 22, 2014
    Applicant: IHI Corporation
    Inventors: Yutaka Uneura, Atsushi Koike, Hideyuki Kojima
  • Publication number: 20140072459
    Abstract: The invention relates to an axial bearing for retaining a rotor on a shaft of an electric drive. The axial bearing has a multi-sided outer contour.
    Type: Application
    Filed: May 2, 2012
    Publication date: March 13, 2014
    Inventor: Michal Kalavsky
  • Publication number: 20140056736
    Abstract: A scroll compression mechanism 11 for compressing refrigerant and a driving motor 13 that is connected to the scroll compression mechanism 11 through a driving shaft 15 and drives the scroll compression mechanism 11 are accommodated in a casing 3, the scroll compression mechanism 11 is supported in the casing 3 by a main frame 21, a stator 37 of the driving motor 13 is directly or indirectly supported in the casing 3, and the driving shaft 15 is connected to a rotor 39 of the driving motor 13 and supported in the casing 3 by a bearing plate 8, and a lower end of the driving shaft 15 is supported by a thrust plate 6 provided to the bearing plate 8, and the center position of the rotor 39 is located to be lower than the center position of the stator 37.
    Type: Application
    Filed: December 20, 2011
    Publication date: February 27, 2014
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Satoshi Iitsuka, Tsutomu Kon, Akihiro Hayashi, Kenji Aida, Kazuyoshi Sugimoto, Yasunori Kiyokawa, Yoshihiko Nagase, Katsuki Akuzawa, Yoshiaki Nagasawa
  • Publication number: 20140049906
    Abstract: A fan assembly for a computing device is disclosed. The device can include an impeller having a number of blades and a motor for turning the blades. The motor can turn the blades via a magnetic interaction between the impeller and the motor. A fluid dynamic thrust bearing can be used to control a position of the impeller relative to the motor. In particular, the impeller can be configured to rotate around an axis and the thrust bearing can be used to control movement of the impeller in a direction aligned with the rotational axis. In one embodiment, the thrust bearing can be configured to stabilize the impeller when vibratory forces act upon the fan assembly. More particularly, parameters associated with the thrust bearing can be selected to counteract vibratory forces emitted by a speaker system.
    Type: Application
    Filed: October 23, 2013
    Publication date: February 20, 2014
    Applicant: Apple Inc.
    Inventors: Anthony Joseph Aiello, Jesse T. Dybenko, Brett W. Degner
  • Publication number: 20130343927
    Abstract: A compact electric centrifugal compressor particularly suitable for a heat ventilation air conditioning system for vehicles provides a motor portion (20) and a centrifugal compressor portion (10) driven by the motor portion (20) through a shaft (15). The motor portion includes first and second radial bearingless motors (140, 150). An active axial magnetic bearing or an axial bearingless motor (130) is located between the first and second radial bearingless motors (140, 150). The motor portion is further equipped with auxiliary landing bearings (8).
    Type: Application
    Filed: June 24, 2013
    Publication date: December 26, 2013
    Applicant: AKTIEBOLAGET SKF
    Inventors: Lateb Ramdane, Joaquim Da Silva, Eric Helene, Frederic Ponson, Ulrich Schroeder
  • Patent number: 8568111
    Abstract: A fluid flow machine includes a housing with a connecting piece for a working fluid on an intake side, and a pressure side. At least one impeller is mounted on a shaft, which is held in the housing by radial and axial bearings, and a cooling arrangement is provided for at least one bearing. A revolving part of the axial bearing is designed as a cooling fluid transportation device, wherein a suction connection leads to the intake side of the impeller.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: October 29, 2013
    Assignee: Daimler AG
    Inventor: Andreas Knoop
  • Patent number: 8529222
    Abstract: A surface pump assembly having a thrust chamber with a telescoping shaft. In some embodiments, the surface pump assembly has a pump with a pump shaft, a thrust chamber with a telescoping shaft extending therein, the telescoping shaft extendable to engage the pump shaft and retractable to disengage the pump shaft, and a motor coupled to the telescoping shaft and operable to rotate the telescoping shaft. In some embodiments, the telescoping shaft has a rotatable shaft member, an adjusting nut threadably disposed thereabout, wherein the adjusting nut is moveable axially relative to the shaft member by rotation, and a first sleeve translatably disposed about the shaft member.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: September 10, 2013
    Assignee: National Oilwell Varco, L.P.
    Inventors: Timothy Donald Burns, Jason Neal Whaley
  • Publication number: 20130183168
    Abstract: A surface mounted pump assembly includes a centrifugal pump having a plurality of impellers and an electric motor adapted to drive the pump such that a thrust load from the pump is transmitted to the motor.
    Type: Application
    Filed: December 3, 2012
    Publication date: July 18, 2013
    Applicant: Oilfield Equipment Development Center Limited
    Inventor: Oilfield Equipment Development Center Limited
  • Patent number: 8337142
    Abstract: A technique is provided to facilitate pumping of fluids in a well environment. A submersible pumping system having a submersible pump incorporates features that manage thrust loads resulting from rotating impellers. The thrust reducing features cooperate with the action of the impellers in one or more pump stages to reduce forces otherwise acting on certain pump related components.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: December 25, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: David M. Eslinger, Matthew R. Hackworth
  • Patent number: 8333575
    Abstract: A pump unit is provided having a wet-running electric motor, wherein a rotor of the pump unit can be driven by the electric motor at a maximum speed of greater than 20,000 rev/min, and the rotor is sealed off axially in the region of a suction port.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: December 18, 2012
    Assignee: Grundfos Management a/s
    Inventors: Helge Grann, Christian Rasmussen
  • Patent number: 8262369
    Abstract: A submersible pump unit having a wet-running electric motor and only a single impeller can be driven by the electric motor with a rotation speed greater than 20,000 rpm. The rotor of the electric motor has a diameter of less than 25 mm.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: September 11, 2012
    Assignee: Grundfos Management a/s
    Inventors: Kjeld Appel, Eigil D. Andersen, Jan Harding Gliemann, Christian Rasmussen
  • Patent number: 8215898
    Abstract: A compressor rotor 6a and a turbine rotor 7a are respectively attached at either end of the main shaft 13 so that the compressor rotor 6a is driven by the power generated by the turbine rotor 7a. The main shaft 13 is supported by rolling contact bearings 15 and 16 relative to the radial direction. The thrust force applied to the main shaft 13 is supported by electromagnets 17. A sensor 18 is provided to detect the thrust force which affects the main shaft 13 through air within the compressor 6 and the expansion turbine 7. In the sensor 18, sensor elements having the properties changeable in accordance with a pressing force and capable to electrically detect the change in the properties are arranged in a circumferential direction of the main shaft. The sensor 18 detects the thrust force from the output of the sensor elements.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: July 10, 2012
    Assignee: NTN Corporation
    Inventors: Tsugito Nakazeki, Takayoshi Ozaki, Hiroyuki Yamada
  • Patent number: 8137081
    Abstract: A compressor unit for underwater operation is provided. The compressor unit includes a compressor having a compressor rotor and a plurality of compressor stages. The compressor unit also includes an electric motor having a stator, a motor rotor, and a gastight housing which is provided with an inlet and an outlet. The motor rotor has two radial bearings, namely a first radial bearing and a second radial bearing, each arranged at the ends of the motor rotor. The compressor rotor has two radial bearings, namely a third radial bearing and a fourth radial bearing, each arranged at the ends of the compressor rotor. A coupling which transmits torque is arranged between the two rotors. The above arrangement provides a remedy for vibrations for especially large compressor units.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: March 20, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rainer Gausmann, Gaston Mathijssen
  • Patent number: 8133007
    Abstract: A multiple-stage centrifugal pump comprises a balancing drum coupled to the pump shaft, being axially locked, and turning in a pump body cavity with a minimum clearance; a rotary ring element mounted on the balancing drum and rotating therewith, but being able of axially moving with respect to the rotary shaft, and a fixed ring element mounted on the bottom of the body, a face of the rotary ring element having an annular surface and forming with the fixed ring element a radial breakage path therethrough the fluid flows, the outer diameter of the drum and rotary ring element forming an annular surface providing an axial pushing force, the outer diameter of the rotary ring element, forming a narrowed portion, being less than the diameter of the balancing drum, a pressure difference operating on these surfaces providing a contactless leakage between the rotary ring and fixed ring elements, the axial position of the rotary ring element depending on a combined action of two pushing forces, thereby providing a very
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: March 13, 2012
    Assignee: Pompe Garbarino S.p.A.
    Inventor: Alberto Marcelli
  • Publication number: 20120051952
    Abstract: A charging device for an energy conversion device, e.g., a fuel cell, of a motor vehicle, has a rotor rotatably mounted on a housing of the charging device, the rotor having a shaft and at least two compressor wheels which are connected in rotationally fixed fashion to the shaft. The compressor wheels have wheel rear parts facing away from respective compressor wheel inlets, by which a medium that is to be supplied to the energy conversion device, e.g., air, is compressible. The wheel rear parts of the compressor wheels are matched to one another such that respective forces which are opposed to one another and which result from respective compressor wheel outlet forces impressed on the wheel rear parts substantially balance one another.
    Type: Application
    Filed: August 24, 2011
    Publication date: March 1, 2012
    Inventors: Andreas Knoop, Thomas Steidten, Reiner Kimmich
  • Patent number: 8113798
    Abstract: A turbomachine has a housing and a rotor mounted radially and axially in the housing. The rotor has a shaft and at least one impeller attached to the shaft. Two tilt-segment bearings having tilt segments, which bearings act in opposite directions, are provided for axial mounting of the rotor. The bearings interact with an assigned contact surface of the shaft. At least one of the tilt segments has a force measurement device for direct detection of the axial force acting on the assigned tilt segment. The force measurement devices are connected with an electronic control device.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: February 14, 2012
    Assignee: Atlas Copco Energas GmbH
    Inventor: Werner Bosen
  • Patent number: 8104298
    Abstract: A vapor compression system includes a compressor, a condenser, an expansion device and an evaporator. Refrigerant circulates though the closed circuit vapor compression system. Touchdown bearings protect a rotor during power shutdown of the compressor. Liquid refrigerant from the condenser flows along a supply line and lubricates the touchdown bearings. The refrigerant from the touchdown bearings is discharged through an outlet and flows along a discharge line to the evaporator.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: January 31, 2012
    Assignee: Carrier Corporation
    Inventor: Vishnu M. Sishtla
  • Patent number: 8016571
    Abstract: A pump end assembly has a centrifugal pump and a motor separated by a chamber. The chamber contains a thrust bearing as well as an intake for the pump. Fluid flowing into the intake flows through the thrust chamber and to the inlet of the pump. Some of the fluid also flows through the thrust bearing for lubricating the thrust bearing.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: September 13, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Gary W. Speer, Terry W. Shafer, Mark C. James
  • Patent number: 7987913
    Abstract: A rotary pump having thrust bearings includes a system for equalizing the loading on the thrust bearings. The thrust bearings are each supported on pistons that are in fluid communication with a hydraulic circuit. The hydraulic circuit has substantially the same pressure throughout, thereby floating each piston at the same pressure to provide an equal support force to each thrust bearing via each piston.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: August 2, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Larry J. Parmeter, Scott C. Strattan, David W. Chilcoat
  • Patent number: 7942648
    Abstract: Lifetime required of mobile-use fuel cells is secured and prolonged, stabilized pump performance is maintained by preventing bearing seizure and abnormal wear. The shaft (101) of a pump mechanism section (100) and the shaft (201) of a motor section (200) are integrated, and the shafts (101, 201) are supported by two or more ball bearings disposed in the pump mechanism section (100), thereby making it possible to fill grease in the closed spaces of the ball bearings (300), and secure a sufficient lifetime basically with almost no possibility of the grease leaking out, even if it is used at a relatively high environmental temperature.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: May 17, 2011
    Assignee: Panasonic Corporation
    Inventors: Atsushi Sakuda, Noboru Iida, Tatsuya Nakamoto, Ryuichi Ohno, Kiyoshi Sawai, Hiroyuki Fukuhara, Hideki Murakami
  • Patent number: 7896626
    Abstract: An electric pump uses an inner-rotor type, brushless DC motor. A casing of the electric pump is formed by a pump casing and a main casing. A sensor-stator assembly is disposed in a space between a side wall portion of the main casing and a can and is sealed with resin. A first elastic seal member is disposed, in a fluid-tight manner, between the can and the main casing. A second elastic seal member is disposed, in a fluid-tight manner, between the pump casing and the main casing. In this condition, the pump casing and the main casing are fixed together.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: March 1, 2011
    Assignee: Minebea Co., Ltd.
    Inventors: Yukio Shibuya I, Satomi Uchiyama, Takanori Suzuki
  • Patent number: 7825558
    Abstract: A fan (100) has an electronically commutated drive motor (ECM 52) with a stator (50) connected to a bearing tube (54) and a rotor (22) on a shaft (34). The shaft (34) is journaled in the tube (54) using passive radial magnetic bearings (16, 18) to minimize friction and wear, is axially displaceable with respect to the tube (54), and is drivingly connected to a rotor magnet (44) forming a first magnetic yoke (46). A second magnetic yoke (27) is connected to the shaft (34), and has an inner surface (59) defining a substantially cylindrical air gap (57) through which, during operation, a radial magnetic flux (55?) extends. A plunger coil (64) extends into the air gap (57) and is mechanically connected to the tube (54) so that, upon axial displacement of the plunger coil (64), the position of the shaft (34) with respect to the tube (54) changes.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: November 2, 2010
    Assignee: EBM - Papst St. Georgen GmbH and Co. KG
    Inventors: Gerald Jungmayr, Wolfgang Amrhein
  • Patent number: 7785082
    Abstract: A rotating shaft is supported by journal bearings that can support without contacting the rotating shaft itself. Then, one end of both shaft end portions of the rotating shaft has a main impeller installed and the other end is provided with a sub impeller. By utilizing a force being generated by rotation of the main impeller, liquid being pumped (fluid being pumped) is sucked in through a suction port and discharged through a discharge port. On the other hand, by utilizing a force being generated by rotation of the sub impeller, fluid is transported to the journal bearings, thereby having the journal bearings support the rotating shaft.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: August 31, 2010
    Assignee: Mitsubishi Heavy Industries, Ltd
    Inventors: Kimihiko Mitsuda, Yasuharu Yamamoto, Toshiyuki Osada, Zenichi Yoshida
  • Patent number: 7708534
    Abstract: A well pump assembly has a rotary pump with an electrical motor that contains a motor lubricant. A thrust chamber is mounted between the motor and the pump, the thrust chamber containing a thrust chamber lubricant. Seals prevent the entry of thrust chamber lubricant into the motor chamber. A pressure equalizing chamber is mounted to the motor for admitting well fluid. A first pressure barrier in the equalizing chamber equalizes the pressure of the thrust chamber lubricant with that of the well fluid. A second pressure barrier contained within the first pressure barrier equalizes the pressure of the motor lubricant with thrust chamber lubricant.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: May 4, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Larry J. Parmeter, Arturo Luis Poretti
  • Publication number: 20090260388
    Abstract: The air cycle refrigerating/cooling system compresses air that has flown in with a compressor (6) in a turbine unit (5) and adiabatically expands the air with an expansion turbine (7) in a turbine unit (5). In the turbine unit (5), a compressor rotor (6a) of the compressor (6) and a turbine rotor (7a) of the expansion turbine (7) are attached to the same main shaft (13), the main shaft (13) is supported by bearings (15) and (16) so as to be freely rotatable, and part or the entirety of the thrust force applied to this main shaft (13) is supported by an electromagnet (17).
    Type: Application
    Filed: August 10, 2006
    Publication date: October 22, 2009
    Applicant: NTN CORPORATION
    Inventors: Tsugito Nakazeki, Takayoshi Ozaki, Hiroyuki Yamada, Yoshihide Umetsu
  • Publication number: 20090208352
    Abstract: A balance shaft function may be realized without employing a balance shaft, when an oil pump includes an inner rotor fixed to the rotation shaft and an outer rotor that rotates with the inner rotor if at least one rotor of the inner and outer rotors has a mass center formed apart from a rotation center.
    Type: Application
    Filed: January 23, 2008
    Publication date: August 20, 2009
    Inventors: Min Sig Shin, Myung Rae Cho, Hong Wook Lee, Wootae Kim, Jin Woo Cho
  • Patent number: 7566208
    Abstract: A non-electric drive mechanism connectable to a submersible pump for pumping a fluid from a wellbore to the surface, the drive mechanism including a shaft rotatably disposed within a housing, the shaft operationally connectable to the submersible pump, at least one fan connected to the shaft and a supply manifold positioned to pass a pressurized fluid across the at least one fan in a manner to rotate the fan and the shaft.
    Type: Grant
    Filed: November 8, 2005
    Date of Patent: July 28, 2009
    Assignee: Schlumberger Technology Corporation
    Inventor: Enrique C. Santos