Fluid Force On Opposite Face Of Blade Or Blade Support Member Patents (Class 415/106)
  • Patent number: 11306726
    Abstract: A bearing system includes a bearing housing that includes a sleeve and a mounting structure for connecting the bearing system to a compressor housing. The sleeve has a radial inner surface that defines a cylindrical bore, and includes a locking feature located along the radial inner surface. The mounting structure is located radially outward from the sleeve. The bearing system also includes a foil bearing assembly positioned within the cylindrical bore. The foil bearing assembly includes an outer foil, an inner foil, and a bump foil positioned between the outer foil and the inner foil. At least one of the outer foil and the inner foil includes a bearing retention feature cooperatively engaged with the locking feature to maintain the foil bearing assembly within the bearing housing at a fixed rotational position.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: April 19, 2022
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Michael M. Perevozchikov, Chris N. Siefring, Craig F. Robillard, Zheji Liu
  • Patent number: 11215232
    Abstract: The preferred embodiments of the present invention provide two advantageous features, which are especially beneficial in combination, but which can be advantageously and beneficially employed independently of one another: (1) firstly, a self-cooling motor bearing system; and (2) secondly, a self-lubricating motor bearing system. In the preferred embodiments, one or both of these two advantageous features are integrated inside an electric motor (e.g., within the electric motor's enclosure housing) in such a manner as to greatly enhance bearing operating conditions (e.g., maintaining adequate bearing lubrication and/or bearing operating temperature) without the use of external lubrication units and/or external cooling units.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: January 4, 2022
    Inventors: James W. Gray, Chetan Channapatana, Sergio Hernandez
  • Patent number: 11181119
    Abstract: An impeller includes a base plate, a hub protruding from the base plate, and a number of blades connected to the base plate and extending from a lateral surface of the hub toward an edge of the base plate. Opposite sides of each of the blades are a working surface and a non-working surface. The base plate is divided into a plurality of sub-plates by the plurality of blades. Each of the sub-plates is located between two adjacent blades and connected to the non-working surface of one of the two adjacent blades and the working surface of the other one of the two adjacent blades. A distance from an edge of each of the sub-plates to a center of rotation of the impeller is varied.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: November 23, 2021
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Chuanjiang Guo, Chuanhui Fang, Feng Xue, Hongguang Li, Shaopeng Mo, Guilin Li
  • Patent number: 11136989
    Abstract: An impeller designed for use in radial pumps. The impeller compensates for axial forces during pumping operations. The impeller utilizes vanes having 3D geometry which extend from the impeller intermediate plate eye to the external diameter of the intermediate plate. On the backside of the intermediate plate, the vanes define a plurality of hydraulic passages. The hub plate also includes a series of balancing holes.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: October 5, 2021
    Inventors: Yubal Sakanassi García, Victor de Jesús Melendez-Leal, Ovidio Montalvo Fernández, Tine Gantar
  • Patent number: 10738892
    Abstract: A rotary machine includes a seal device capable of restricting a flow of a fluid in a clearance between a stationary member and a rotational member. The seal device includes a pressure loss element mounted to the stationary member, a first non-contact type seal protruding from the rotational member toward the pressure loss element and facing the pressure loss element via a first gap, and a second non-contact type seal protruding from the stationary member toward the rotational member, facing the rotational member via a second gap, and being positioned on one side of the pressure loss element in a flow direction of the fluid. The seal device also includes a contact type seal protruding from the stationary member toward the rotational member and being disposed downstream of the pressure loss element and the second non-contact type seal in the flow direction of the fluid.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: August 11, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Masato Araki, Yoshiyuki Okabe, Ryosuke Mito, Keita Takamura, Shinya Hashimoto
  • Patent number: 10690139
    Abstract: A multi-stage pump featuring first and second stages, each stage having an impeller arranged on a rotor of the pump, each impeller having a hub-side and an eye-side, and each impeller configured to pump a liquid through the pump that applies an axial thrust load caused by a pressure difference in an axial direction from the hub-side to the eye-side of each impeller; and a first and second stage pump casing, each casing configured to form a casing enclosure to contain components of the first stage and the second stage, including each impeller, and configured with one or more pump casing openings formed therein and passing thru the pump casing to leak at least some liquid being pumped from inside to outside the casing enclosure to reduce substantially the axial thrust load caused by the pressure difference in the axial direction from the hub-side to the eye-side of each impeller.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: June 23, 2020
    Assignee: ITT MANUFACTURING ENTERPRISES LLC
    Inventors: Paul Walter Behnke, Timothy Michael Dach, Carlos Preciado
  • Patent number: 10539146
    Abstract: A centrifugal pump includes a motor having a shaft, and an impeller engaged with an end portion of the shaft such that a rotation of the impeller relative to the shaft is limited. The impeller includes a main panel engaged with the shaft, a plurality of passage walls extending from the main panel in an axial direction, a side panel in contact with end surfaces of the passage walls that face away from the main panel, the side panel having an inflow opening at a radially center part, and a fluid passage that is defined by the passage walls adjacent to each other in a circumferential direction, the fluid passage communicating with the inflow opening. The side panel includes an engagement portion configured to be engaged with a fixation jig that limits a rotation of the impeller during fixing the impeller to the shaft by screwing a nut.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: January 21, 2020
    Assignee: DENSO CORPORATION
    Inventor: Kunio Nanba
  • Patent number: 10480514
    Abstract: A pump arrangement, particularly a magnetic clutch pump arrangement, includes a containment can with a central longitudinal axis which hermetically seals an enclosed chamber with respect to the inner chamber formed by the pump housing. The containment can has a base with at least one bead extending into the inner chamber. The at least one bead is radially spaced from the central longitudinal axis of the containment shell by at least one defined distance relationship. A method for producing a containment can for a pump arrangement is also provided.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: November 19, 2019
    Assignee: KSB Aktiengesellschaft
    Inventor: Patrick Drechsel
  • Patent number: 10465713
    Abstract: An object is to provide a rotary fluid element and a method of correcting unbalance of a rotary fluid element, whereby unbalance of the rotary fluid element can be corrected multiple times in a necessary and sufficient amount without sacrificing strength of blades. A rotary fluid element includes: a plurality of blades extending in a centrifugal direction on an outer peripheral surface of a boss portion and disposed at intervals in a circumferential direction; and a cut-remove portion for reducing unbalance disposed in a blade gap between the blades adjacent in the circumferential direction. The cut-remove portion includes a first cut-remove portion which is cut and removed on a radially-outer rim portion between the blades, and an additional cut-remove portion which is cut and removed on a radially-inner portion disposed inside the first cut-remove portion with respect to a radial direction.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: November 5, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Nariaki Seike, Hideo Mori, Hiroshi Nakagawa
  • Patent number: 10233881
    Abstract: An outer wall surface of an output end portion includes a pair of first plane surfaces which are formed at different positions in its circumferential direction. An inner wall surface of a fitting hole includes a pair of second plane surfaces which are formed at different positions in the circumferential direction. A clearance between one of the pair of first plane surfaces and one of the pair of second plane surfaces is made larger from one side toward the other side in an axial direction in a state that a rotary shaft and an impeller are concentric with each other.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: March 19, 2019
    Assignee: DENSO CORPORATION
    Inventors: Yuuji Hidaka, Masaya Ootake
  • Patent number: 10233944
    Abstract: An impeller for used in a fluid pump device includes a shaft controlled to revolve in a first direction; an impeller body coupled to the shaft and driven by the revolving shaft to rotate, the impeller body having a top surface, a bottom surface and a circumferential surface; a first set of fluid-guiding members disposed on the top surface of the impeller body for driving a fluid to flow along a centrifugal direction of the revolving shaft; and a second set of fluid-guiding members disposed on the circumferential surface of the impeller body. Each or at least one of the second set of fluid-guiding members has a titling structure for driving the fluid to flow from the top to the bottom of the impeller along a designated path on the circumferential surface.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: March 19, 2019
    Assignee: COOLER MASTER CO., LTD.
    Inventors: Fu-Lung Lin, Shui-Fa Tsai, Tsung-Wei Lin
  • Patent number: 10161406
    Abstract: A compressor (22) has a housing assembly (50) with a suction port (24) and a discharge port (26). An impeller (54) is supported by a shaft (70) which is mounted for rotation to be driven in at least a first condition so as to draw fluid in through the suction port (24) and discharge the fluid from the discharge port (26). A magnetic bearing system (66, 67, 68) supports the shaft (70). A controller (84) is coupled to an axial position sensor (80) and is configured to control impeller position.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: December 25, 2018
    Assignee: Carrier Corporation
    Inventor: Vishnu M. Sishtla
  • Patent number: 10094222
    Abstract: The present invention relates to a centrifugal pump, the impeller of which comprises a shroud (34) with at least one solid and rigid working vane (36), and at least one solid and rigid rear vane (38), the at least one working vane (36) having a leading edge region (46), a trailing edge region (48), a central region (C), a side edge, a pressure face (42) and a suction face (44), the at least one solid and rigid rear vane (38) having a trailing edge region, a side edge, a pressure face and a suction face. The trailing edge region (48) of the at least one working vane (36) is rounded by means of a rounding to have a thickness greater than that in the central region (C).
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: October 9, 2018
    Assignee: Sulzer Management AG
    Inventors: Matti Koivikko, Kalle Tiitinen, Sami Virtanen, Jussi Matula
  • Patent number: 10001141
    Abstract: A compressor that includes a frame, a rotor assembly, and a heat sink assembly. The rotor assembly includes a bearing assembly to which the heat sink assembly is secured. The compressor is configured such that, during use, air is drawn through the interior of the frame. The heat sink assembly then extends radially from the bearing assembly into the air path through the frame such that the air flows over the heat sink assembly.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: June 19, 2018
    Assignee: Dyson Technology Limited
    Inventors: Gary King, Paul Adrian Graham Jacob
  • Patent number: 9840122
    Abstract: A shock absorber comprising a generally tubular body defining a working chamber. A piston is slidable in the working chamber and separates a compression chamber from a rebound chamber of the working chamber. The working chamber contains damping fluid. The shock absorber comprises an electric generator fitted thereto. The generator comprises a turbine rotatably coupled to at least one magnet and coils adjacent the magnet. The shock absorber comprising a turbine flow path between the compression chamber and the rebound chamber, the turbine being supported for rotation in the turbine flow path driven to rotate by flow of damping fluid. Preferably the turbine flow path comprises a compression flow path and a rebound flow path and a turbine chamber, the compression flow path providing for flow of damping fluid from the compression chamber though the turbine chamber to the rebound chamber.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: December 12, 2017
    Inventor: Vilo Niumeitolu
  • Patent number: 9829008
    Abstract: A centrifugal compressor including: a casing; at least one impeller supported for rotation in the casing and provided with a hub, a shroud and an impeller eye; an impeller-eye sealing arrangement, for sealing the impeller in the region of said impeller eye. The centrifugal compressor further includes at least one cooling-medium portlocated at the impeller-eye sealing arrangement, arranged for delivering a cooling medium around the impeller eye.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: November 28, 2017
    Assignee: Nuovo Pignone Srl
    Inventors: Manuele Bigi, Massimo Camatti, Bhaskara Kosamana, Rajesh Mavuri, Massimiliano Borghetti, Rajesh Mamidi
  • Patent number: 9822797
    Abstract: A turbomachine having a cooling device for supplying cooling air onto a compressor region from an air distribution chamber is disclosed, the air distribution chamber being arranged between an outlet diffuser of a compressor and a combustion chamber, where the cooling device has cooling air pipes for supplying cooling air from the air distribution chamber into a cavity between the outlet diffuser and a rotor segment of the compressor.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: November 21, 2017
    Assignee: MTU AERO ENGINES AG
    Inventor: Alexander Boeck
  • Patent number: 9784282
    Abstract: A compressor that includes an impeller, a diffuser and a shroud. The diffuser includes vanes and one or more projections, each of which extends from a top of a vane. The shroud includes one or more holes. The shroud covers the impeller and the diffuser such that each projection protrudes through one of the holes. The shroud is then secured to the projections by an adhesive.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: October 10, 2017
    Assignee: Dyson Technology Limited
    Inventors: Donald Victor Robson, Gary King
  • Patent number: 9726041
    Abstract: A cooling option for a steam turbine is provided, wherein the steam turbine includes a high-pressure zone and a medium-pressure zone, wherein the saturated steam streaming out of the high-pressure zone is discharged via a saturated steam conduit to a first pressure chamber in a second flow channel of the medium-pressure zone and thus the possibility of the saturated steam causing damage by corrosion and erosion in the high-pressure zone is prevented.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: August 8, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Henning Almstedt, Peter Dumstorff, Martin Kuhn, Thomas Müller, Rudolf Pötter, Norbert Thamm, Uwe Zander
  • Patent number: 9377027
    Abstract: Apparatus, including a vertical double-suction pump, is provided featuring a pump casing and a double suction impeller arranged therein on a shaft. The pump casing has a pump casing wall. The double suction impeller has upper and lower shrouds with metal rims configured to form upper and lower isolating annuli between the double suction impeller and the wall of the pump casing in order to impede a recirculation flow from an impeller discharge to be able to act of the upper and lower shrouds and create a controlled axial thrust load from differentiated hydraulic pressure on the upper and lower shrouds. The upper and lower isolating annuli may also be geometrically varied between the upper and lower shrouds of the double suction impeller to create a pressure differential in a direction parallel to an axis of rotation of the double suction impeller.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: June 28, 2016
    Assignee: ITT MANUFACTURING ENTERPRISES LLC.
    Inventors: Paul W. Behnke, Matthew J. Koren
  • Patent number: 9353754
    Abstract: A multi-stage axial compressor for counter rotation. A first series of rotor blade assemblies are mounted on and rotate with the driveshaft, each rotor blade assembly of the first series comprising a rotating stage of the multi-stage axial compressor. A second series of rotor blade assemblies provide a counter-rotating stage of the multi-stage axial compressor. An accessory drive links the second series of rotor blade assemblies to the driveshaft and causes counter-rotation of the second series of rotor blade assemblies.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: May 31, 2016
    Assignee: Embry-Riddle Aeronautical University, Inc.
    Inventors: Vinod Gehlot, Magdy S. Attia
  • Patent number: 9109606
    Abstract: The pump includes a stator and a rotor having an impeller in which a fluid duct passes. An axial balancing device arranged on this wheel includes a rear balancing chamber and a passage arranged between the wheel and the stator, enabling evacuation of fluid from the fluid duct to the balancing chamber. The pressure of fluid in the balancing chamber compensates the pressures exerted by the fluid on the rest of the rotor allowing axial balancing of the rotor. The passage includes an upstream nozzle and a downstream nozzle, as well as an intermediate annular chamber, arranged between walls of the wheel and of the stator, the intermediate chamber being arranged downstream of the upstream nozzle and upstream of the downstream nozzle.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: August 18, 2015
    Assignee: SNECMA
    Inventors: Sébastien Boufflert, Nicolas Juhel, Patrice Fayolle, Stéphane Laffite
  • Patent number: 9046112
    Abstract: A mechanical coolant pump for an internal combustion engine includes a pump rotor wheel comprising a blocking ring and rotor blades. The rotor blades are configured to pump a coolant radially outwardly. Variable pump stator blades are pivotably supported by a static blade holding ring at a first axial blade end. The variable pump stator blades are arranged radially outwardly of the pump rotor wheel. The blocking ring is arranged to partially overlap a second axial blade end.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: June 2, 2015
    Assignee: PIERBURG PUMP TECHNOLOGY GMBH
    Inventors: Laurent Finidori, Jean-Michel Durand, Arnaud Fournier
  • Publication number: 20150118021
    Abstract: A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller.
    Type: Application
    Filed: December 11, 2014
    Publication date: April 30, 2015
    Inventors: Jeffrey A. LaRose, Charles R. Shambaugh, JR.
  • Patent number: 8935926
    Abstract: An impeller includes a plurality of vanes formed around a hub, each of the plurality of vanes defines an offset between a leading edge and a trailing edge.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: January 20, 2015
    Assignee: United Technologies Corporation
    Inventors: Joel H. Wagner, Shankar S. Magge, Keith A. Santeler
  • Patent number: 8932006
    Abstract: A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: January 13, 2015
    Assignee: HeartWare, Inc.
    Inventors: Jeffrey A. LaRose, Charles R. Shambaugh
  • Patent number: 8801364
    Abstract: An impeller or axial stage compressor disk backface shroud for use with a gas turbine engine is disclosed. The backface shroud includes, but is not limited to, a substantially funnel shaped body having a surface. The substantially funnel shaped body is configured to be statically mounted to the gas turbine engine substantially coaxially with the impeller or axial stage compressor disk. The surface and a backface of the impeller or axial stage compressor disk form a cavity that guides an airflow portion to a turbine when the substantially funnel shaped body is mounted coaxially with the impeller or axial stage compressor disk and axially spaced apart therefrom. The airflow portion has a tangential velocity and a recessed groove in the surface of the backface shroud is oriented generally transversely to the tangential velocity to at least partially interfere with the airflow portion, thus affecting static pressure in the cavity.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: August 12, 2014
    Assignee: Honeywell International Inc.
    Inventors: Mark C. Morris, Alexander MirzaMoghadam, Khosro Molla Hosseini, Kin Poon, Jeff Howe, Alan G. Tiltman
  • Patent number: 8753077
    Abstract: A slinger shield structure is provided and includes a first annular disc, having a body, opposing faces defining an aperture extending through the body and through-holes extending through the body, which are arrayed around the aperture, a second annular disc having a body and opposing faces defining an aperture extending through the body, a hub for connection with the first and second annular discs at the respective apertures and radial vanes suspended between the first and second annular discs at a distance from the hub to define radial channels between adjacent radial vanes and drainage channels between the radial vanes and the hub.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: June 17, 2014
    Assignee: General Electric Company
    Inventors: Sanjay Gupta, Subbiah Natarajan, Bansidhar Jagannath Phansalkar
  • Patent number: 8622691
    Abstract: The invention provides a supercharger which is provided with a thrust bearing in an outer side of a radial bearing, and can smoothly discharge a fed lubricating oil from a bearing portion so as to reduce a resistance generated by the lubricating oil. The supercharger is provided with a thrust bearing (30) rotatably supporting a thrust force applied to a turbine shaft (12). The thrust bearing (30) is constituted by a disc-shaped thrust collar (32) rotating together with the turbine shaft, and a turbine side thrust bearing (34) and a compressor side thrust bearing (36) inhibiting a movement in an axial direction of the thrust collar.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: January 7, 2014
    Assignee: IHI Corporation
    Inventors: Masatoshi Eguchi, Kazuhiro Onitsuka, Masahiro Shimizu
  • Patent number: 8568081
    Abstract: An electrical submersible pumping system having a pump, a motor, a shaft connecting the pump and motor. Coaxially stacked rotating impellers and stationary diffusers are coaxially housed within the pump. Radial ports are formed in a hub of the diffusers that direct fluid pressurized by an impeller to a cavity formed on the shroud of the impeller. Axial ports are formed in the shrouds of the impellers that direct fluid from the cavity to a fluid flow passage within the impeller. Strategic placement and sizing of the radial and axial ports balances thrust forces exerted onto the impeller.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: October 29, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: Baojun Song, David Chilcoat
  • Patent number: 8540477
    Abstract: A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: September 24, 2013
    Assignee: HeartWare, Inc.
    Inventors: Jeffrey A. LaRose, Charles R. Shambaugh
  • Patent number: 8529191
    Abstract: A fluid machine and method of operating the same includes a pump portion having a pump impeller chamber, a pump inlet and a pump outlet and a turbine portion having a turbine impeller chamber, a turbine inlet and a turbine outlet. A shaft extends between the pump impeller chamber and the turbine impeller chamber. The shaft has a shaft passage therethrough. A turbine impeller is coupled to the impeller end of the shaft disposed within the impeller chamber. The turbine impeller has vanes at least one of which comprises a vane passage therethrough. A thrust bearing is in fluid communication with said vane passage.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: September 10, 2013
    Assignee: Fluid Equipment Development Company, LLC
    Inventor: Eli Oklejas, Jr.
  • Patent number: 8506238
    Abstract: Systems and methods for improving seal performance in a centrifugal water pump for an internal combustion engine increase static pressure at the seal by incorporating a combination of slots and ribs into a seal cavity of the pump housing that are positioned to convert dynamic fluid pressure into static pressure at the seal while reducing coolant velocity at the seal. Vent holes in the impeller having an appropriate size and location may also be used to increase the static pressure at the seal to enhance seal performance.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: August 13, 2013
    Assignee: Ford Global Technologies, LLC
    Inventors: Jody Slike, Patrick Hertrich, Paul Po-Wen Yu
  • Patent number: 8469654
    Abstract: A rotary-type fluid machine which enables practical and effective operation in an extremely low specific speed range. The rotary-type fluid machine (1, 1?) has an impeller (10, 10?) integrally connected to a rotating drive shaft (2). The impeller is accommodated in a casing (3). Fluid (a) of a suction fluid passage (4) to be pumped flows into a center part (11) of the impeller. The fluid (b) is discharged from a peripheral portion (12) of the impeller by the effect of the centrifugal force of the rotating impeller, so that the fluid is delivered through a delivery fluid passage (5) outside of the casing. Many grooves (15) extending toward a peripheral edge of the impeller from the center part of the impeller are formed on the impeller. The groove opens on an outer circumferential surface (18) of the impeller, and causes strong recirculation vortices (R) to be formed in the vicinity of the peripheral edge of the impeller when the impeller rotates.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: June 25, 2013
    Assignee: National University Corporation Yokohama National University
    Inventors: Junichi Kurokawa, Shuusaku Kagawa
  • Patent number: 8333548
    Abstract: A turbomachine arranged with a rotor and a stator, including a radial positioning device ensuring that the rotor is radially positioned; and a contactless axial balancing device arranged on at least one bladed wheel for axially balancing the rotor at high speed. The turbomachine includes a thrust bearing distinct from the radial positioning device serving to balance the rotor axially at low speed, and without contact at high speed. In addition, the radial positioning device is constituted by hydrostatic bearings, the turbomachine including hydrostatic bearing feed circuits suitable for connecting the bearings to a source of fluid under pressure. As a result, it is possible to obtain operation at high speeds with a very long lifetime.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: December 18, 2012
    Assignee: Snecma
    Inventors: Valérie Begin, Frédéric Boudehen, François Danguy, Manuel Frocot
  • Patent number: 8297913
    Abstract: A fuel pump has a casing and an impeller. The impeller is substantially disk shaped having an upper surface and a lower surface The impeller is rotatable within the casing around a rotational axis. A plurality of impeller depressions is formed in at least the lower surface of the impeller. The plurality of impeller depressions is located on at least one of the inside and the outside of a group of concavities. The plurality of impeller depressions is arranged on a circle around the rotational axis of the impeller. Each of the impeller depressions has its deepest portion in a rear half thereof with respect to the rotational direction of the impeller.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: October 30, 2012
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventor: Kazumichi Hanai
  • Patent number: 8282340
    Abstract: A turbo-machine including a volute casing, a rotating shaft, an impeller, seals, an axial thrust control member and a bellows unit. The volute casing defines therein a fluid passage. The rotating shaft is rotatably provided in the volute casing. The impeller is coupled to the rotating shaft to draw fluid using centrifugal force. The seals are provided around the front and rear ends of the impeller to prevent leakage of fluid. The axial thrust control member is installed in the volute casing behind the impeller. The bellows unit includes the piston installed in the volute casing in a shape surrounding a circumferential outer surface of the axial thrust control member; and a bellows connected with one surface of the piston, the bellows having the predetermined elasticity; and an internal space, between the piston and the volute casing, isolated from the fluid drawn behind the impeller.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: October 9, 2012
    Assignee: Korea Aerospace Research Institute
    Inventors: Dae-Jin Kim, Jinhan Kim
  • Patent number: 8241005
    Abstract: In one embodiment a centrifugal impeller has an axis of rotation, a plurality of blades, and a plurality of pitches defined between the blades. A cavity may be formed in a back side of the impeller, opposite with at least one of the plurality of pitches. In one form the cavity may not extend below a radius determined according to a stress criteria or stress limitation.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: August 14, 2012
    Assignee: Rolls-Royce North American Technologies, Inc.
    Inventors: Calvin W. Emmerson, Robert A. Ress, Jr., Stephen N. Hammond
  • Patent number: 8221070
    Abstract: An impeller for a centrifugal pump that includes a disk-shaped shroud having a central axis, a front surface, a rear surface, and a circular perimeter, and a hub at the center of the shroud, the hub having an axial bore. The impeller further includes a first set of vanes on the front surface of the shroud, the first set of vanes extending radially inward from the perimeter towards the hub, a second set of vanes on the rear surface of the shroud, the second set of vanes extending radially inward from the perimeter towards the hub, a balancing area on the rear surface of the shroud, the balancing area extending radially outward from the hub, and a number of openings in the shroud, the number of openings configured to allow a fluid to pass from one side of the shroud to the other.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: July 17, 2012
    Assignee: Woodward, Inc.
    Inventor: Dmitriy Baryshnikov
  • Patent number: 8202037
    Abstract: Disclosed is a steam turbine comprising an exterior housing and an interior housing. The exterior housing and the interior housing are provided with a fresh steam supply duct. A rotor that encompasses several impeller blades and a thrust-compensating piston is rotably mounted within the interior housing. The interior housing is equipped with several guide blades that are disposed such that a flow duct comprising several blade stages, each of which comprises a series of impeller blades and a series of guide blades, is formed along a specific direction of flow. The interior housing is further equipped with a recirculation duct which is embodied as a pipe that communicates between a space located between the interior housing and the exterior housing and the flow duct downstream of a blade stage.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: June 19, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Frank Deidewig, Yevgen Kostenko, Oliver Myschi, Michael Wechsung, Uwe Zander
  • Patent number: 8128341
    Abstract: Disclosed is a steam turbine with a casing, wherein a turbine shaft having a thrust-compensating piston is rotatably mounted inside the casing and directed along a rotation axis, wherein a flow passage is formed between the casing and the turbine shaft. The turbine shaft has in its interior a cooling line for directing cooling steam in the direction of the rotation axis. The cooling line, on one end, is connected to at least one inflow line for the inflow of cooling steam into the cooling line from the flow passage, and on the other end, is connected to an outflow line for directing cooling steam onto a lateral surface of the thrust-compensating piston. An essential aspect is, the cooling steam discharging onto the lateral surface of the thrust-compensating piston mixes with some of the live steam and is directed back into the flow passage via a return line arranged in the casing.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: March 6, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventor: Kai Wieghardt
  • Patent number: 8047767
    Abstract: A high pressure first stage turbine and seal assembly are described. In one embodiment, a high pressure turbine section is provided. The turbine section includes at least one stage, at least one rotor and a bucket assembly. The bucket assembly includes a bucket and an attachment fixture. The stage has a high root reaction during operation. An intermediate space is between the bucket assembly and a stationary component of the turbine section. A seal is provided between the stationary member and the rotor to facilitate preventing leakage from the intermediate space toward an end of the stage. Steam balance holes are provided in the rotor or the bucket to facilitate feeding steam towards an end of the turbine stage.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: November 1, 2011
    Assignee: General Electric Company
    Inventor: Michael Earl Montgomery
  • Patent number: 8016545
    Abstract: A centrifugal pump includes a casing having an impeller chamber, an inlet, an outlet, and a bearing chamber. A shaft disposed within the casing has an impeller end and a motor end. The impeller is coupled to the impeller end of the shaft and is disposed within the impeller chamber. A bearing is disposed within the bearing portion. The bearing has an inboard end with an inboard-bearing surface and an outboard end with an outboard-bearing surface. The bearing and the shaft have a bearing clearance therebetween. A disc is coupled to the shaft on the impeller end which is spaced apart from the inboard-bearing surface. A seal ring is disposed between the disc and the inboard-bearing surface. The shaft, the seal ring, the disc, and the inboard-bearing surface define a thrust chamber therebetween. The thrust chamber is in fluid communication with the impeller chamber through the bearing clearance so that an axial thrust in an inboard direction is generated by the thrust chamber.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: September 13, 2011
    Assignee: Fluid Equipment Development Company, LLC
    Inventor: Eli Oklejas, Jr.
  • Patent number: 7997854
    Abstract: A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: August 16, 2011
    Assignee: Heartware, Inc.
    Inventors: Jeffrey A. LaRose, Charles R. Shambaugh
  • Publication number: 20100237619
    Abstract: A machine for recovering power from a flow of compressed gas, for example, natural gas includes a turbo-expander having a turbo-expander wheel, and a generator having a rotor able to be driven by the turbo-expander wheel and a stator about the rotor. The turbo-expander and the generator are housed in a length of pipe. The turbo-expander wheel has an obverse side facing the generator. There is a flow passage for the flow of expanded gas that places the obverse side of the wheel in gas flow communication with an outer surface of the stator. This outer surface typically carries fins to facilitate cooling of the stator by expanded gas from the turbo-expander.
    Type: Application
    Filed: September 10, 2007
    Publication date: September 23, 2010
    Inventors: Josef Pozivil, Jean-Louis Galelli, Patrice Pflieger
  • Patent number: 7690887
    Abstract: A first centrifugal impeller and a second centrifugal impeller are arranged in such an orientation that back sides of the first centrifugal impeller and the second centrifugal impeller face to each other. Bearings are cylindrical roller bearings and a thrust bearing. The cylindrical roller bearings are arranged at two axially spaced supporting positions respectively, and support a radial load applied to the rotating shaft. The thrust bearing supports a thrust load applied to the rotating shaft.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: April 6, 2010
    Assignee: Ishikawajima-Harima Heavy Industries, Co., Ltd.
    Inventors: Toshio Takahashi, Yutaka Hirata, Kazuo Kobayashi, Kazuaki Kurihara, Kentaro Oda
  • Patent number: 7686572
    Abstract: A pump for the drawing-in of a fluid, including at least one centrifugal wheel having a fluid inlet edge and a fluid outlet edge, the pump further including an axial balancing system with a high-pressure flow space defined between the housing and an upstream face of the centrifugal wheel. The axial balancing system further includes a device for substantially increasing the hydrostatic pressure of the fluid circulating in the high-pressure flow space during operation of the pump.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: March 30, 2010
    Assignee: SNECMA
    Inventors: Fabien Wahl, Francois Danguy, Stephane Laffite, Philippe Bourdin
  • Patent number: 7648332
    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: August 30, 2006
    Date of Patent: January 19, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: David M. Eslinger, Matthew R. Hackworth
  • Patent number: 7572097
    Abstract: An impeller pump including a body and a cover assembled onto the body to form a housing. The body has a fluid inlet and a fluid outlet and an opening for receiving a rotating drive shaft. An impeller is rotatably positioned in the housing with paddles at a periphery thereof. The impeller includes a sleeve with a central pocket formed therein for receiving a drive shaft, a circumferential support ring, and a plurality of radially extending paddles extending from the circumferential support ring. The body and cover define an annular space circumferentially extending around an interior of the housing for receiving the paddles of the impeller. The cover has a wall portion enlarging the annular space in the housing through a portion of the circumference of the annular space.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: August 11, 2009
    Assignee: Whirlpool Corporation
    Inventor: Laurel B. Jaeger
  • 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