EP2459879B1 - Zahnradpumpe - Google Patents

Zahnradpumpe Download PDF

Info

Publication number
EP2459879B1
EP2459879B1 EP10724490.7A EP10724490A EP2459879B1 EP 2459879 B1 EP2459879 B1 EP 2459879B1 EP 10724490 A EP10724490 A EP 10724490A EP 2459879 B1 EP2459879 B1 EP 2459879B1
Authority
EP
European Patent Office
Prior art keywords
stator
gear
gear pump
layer
annular gear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP10724490.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2459879A2 (de
Inventor
Josef Frank
Alexander Fuchs
Klaus Ortner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2459879A2 publication Critical patent/EP2459879A2/de
Application granted granted Critical
Publication of EP2459879B1 publication Critical patent/EP2459879B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/086—Carter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008—Prime movers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/20—Manufacture essentially without removing material
    • F04C2230/22—Manufacture essentially without removing material by sintering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/56—Bearing bushings or details thereof

Definitions

  • the present invention relates to a gear pump according to the preamble of claim 1.
  • Screw pumps include, inter alia, internal gear and gerotor pumps in which a driving gear is eccentric in the internal toothing of a toothed ring.
  • Internal gear pumps which are particularly suitable for providing high pressures, are used to deliver fluids, such as for example, to deliver fuel to an internal combustion engine.
  • a delivery pump which is integrated in an electric motor.
  • the feed pump comprises a first gear and a second gear. Between the two gears, a delivery chamber is formed.
  • the second gear is stored in its center on a thorn.
  • the first gear is an external gear and forms the rotor, the second gear is an internal gear, which is entrained in the eccentric center of the first gear.
  • the first gear comprises glued permanent magnets, which are distributed over the circumference. External magnetic field generators generate a rotating, rotating field which causes direct motor following of the rotor.
  • EP 1 600 635 A2 An internal gear pump is described which has a pump section with an inner rotor formed on its outer periphery with teeth.
  • An outer rotor has teeth formed on its inner periphery. Both rotors are housed in a housing. The storage of the outer rotor formed as a toothed ring takes place here by means of specially shaped additional components.
  • document JP 2005 098268 A discloses a gear pump with an electrically commutatable stator on which a sliding bearing is provided.
  • document DE 102 48 933 C1 discloses an internal gear pump having an electric drive formed by a ring gear forming the interior of a rotor and a stator disposed adjacent thereto.
  • a gear pump for conveying a fluid having a rotatably mounted externally toothed gear and an internally toothed ring, which are for generating a conveying effect in meshing engagement, and which are arranged together with an electrically commutatable stator in a housing, wherein the stator concentrically around extends around the toothed ring and cooperates with the toothed ring to produce an electromotive force, and wherein the toothed ring has a closed, homogeneous cylindrical surface and provided on the stator a sliding bearing is.
  • the toothed ring made of sintered steel or plastic.
  • the motor is designed as a permanent magnet synchronous motor and the magnets are integrated in the toothed ring.
  • the motor is designed as a reluctance motor and in the toothed ring holes or special recesses are introduced to form magnetic poles by field weakening.
  • the sliding bearing is formed on the stator as a layer applied to a surface of the stator opposite the toothed ring, so that the sliding bearing is integrated into the stator.
  • the stator which may be a stator of a permanent magnet or reluctance motor, therefore advantageously acts on the inner diameter at the same time as a radial bearing for the rotor, which is designed as a toothed ring or outer ring of mecanic leopardrad- or ring gear pump.
  • the sliding bearing serves primarily as a wear protection layer between stator and rotor.
  • the sliding bearing provides a centering function for the rotor and can reduce or prevent axial gap losses with appropriate design. This improves the efficiency of the electric motor.
  • the layer is designed with an extension, so that the stator rests against an inner wall of the housing with a bias voltage.
  • the layer is designed so that the bias acts to push the slide bearing in the axial direction corresponding to the top or against the inner wall when mounting the lid. This results in no or a very small axial air gap and consequently occur only very small gap loss.
  • the layer consists of plastic or of a non-ferromagnetic material, in particular of bronze.
  • the layer has a layer thickness which is less than or equal to 0.3 mm. Since a sliding bearing with a thin layer thickness is integrated into the stator, a correspondingly small air gap between the stator and the rotor can be ensured, in particular in the case of the embodiment with reluctance motor. Consequently, a good efficiency of the electric motor can be displayed.
  • the layer is sprayed, glued or vulcanized onto the stator.
  • Fig. 1 shows a section through an internal gear pump 1 according to the prior art.
  • the internal gear pump 1 comprises a pair of gears, which consists of an internally toothed ring gear 2 and an externally toothed gear 3.
  • the gear 3 is arranged eccentrically to the toothed ring 2 rotatably on a bearing journal 4. If the toothed ring 2 is set in a rotational movement, then the external toothing of the toothed wheel 3 meshes in the internal toothing of the toothed ring 2 and generates a delivery volume flow of the fluid in which the teeth run.
  • the gear pair of the toothed ring 2 and the gear 3 is arranged in a housing 5, wherein the bearing pin 4 is integrally formed or integrally with the housing 5.
  • the toothed ring 2 is also rotatable with a magnetic ring 6, wherein the magnetic ring 6 extends radially around the toothed ring 2.
  • the magnetic ring 6 runs in an inner side of a stator 7, which has an electric winding 8. If the electric winding 8 is commutated electrically by a controller, a circulating magnetic field is generated in the stator 7. Due to the rotating magnetic field of the magnet ring 6 is set in rotation, wherein due to the rotationally fixed connection of the magnet ring 6 with the toothed ring 2, the teeth consisting of the toothed ring 2 and the gear 3 is put into operation.
  • the magnetic ring 6 is slidably mounted on the stator 7.
  • the magnetic ring 6 is provided with a corresponding coating of a suitable sliding material. This design is problematic for the application of high discharge pressures and poorly lubricating liquids such as gasoline or diesel.
  • connection cover 9 The open side of the housing 5 of the internal gear pump 1 is closed by means of a connection cover 9, wherein a sealing element 10 is provided for the fluid-tight sealing of the gaps between the connection cover 9 and the housing 5.
  • the sealing element 10 is designed as an O-ring and is arranged in a corresponding circumferential groove (not shown) within the connection cover 9.
  • Fig. 2 shows a cross section through an internal gear pump 1 according to one embodiment.
  • a plurality of magnets 11 is provided (permanent magnet motor). If the electric motor is alternatively designed as a reluctance motor, then instead of the magnets 11 holes (not shown here) are provided for field weakening.
  • a sliding bearing 13 is provided on a cylindrical surface 12 opposite the toothed ring 2, or the sliding bearing 13 is integrated in the stator 7.
  • the slide bearing 13 serves primarily as a wear protection layer between the stator 7 and the rotor or the toothed ring 2.
  • the slide bearing 13 has a centering function for the rotor or the toothed ring 2 and can reduce or prevent axial gap losses with appropriate design, as in Related to Fig. 3 will be explained in more detail.
  • the sliding bearing 13 is formed by a thin layer of plastic sprayed onto the stator 7.
  • Fig. 3 shows a longitudinal section through the internal gear pump 1 of Fig. 2 ,
  • the sliding bearing 13 which is applied to the stator 7 and injected into the stator 7, is formed as a layer having a thickness of less than 0.3 mm, which axially with respect to an inner wall 14 of the housing 5 with an extension 15 is designed such that a bias by conditioning the layer on the inner wall 14 of the housing 5 is formed.
  • the sliding bearing 13 is pressed in the axial direction against the inner wall 14.
  • this special embodiment of the sliding bearing 13 can be used as an axial circumferential seal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP10724490.7A 2009-07-31 2010-06-04 Zahnradpumpe Not-in-force EP2459879B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009028148A DE102009028148A1 (de) 2009-07-31 2009-07-31 Zahnradpumpe
PCT/EP2010/057820 WO2011012362A2 (de) 2009-07-31 2010-06-04 Zahnradpumpe

Publications (2)

Publication Number Publication Date
EP2459879A2 EP2459879A2 (de) 2012-06-06
EP2459879B1 true EP2459879B1 (de) 2013-08-14

Family

ID=43402326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10724490.7A Not-in-force EP2459879B1 (de) 2009-07-31 2010-06-04 Zahnradpumpe

Country Status (8)

Country Link
US (1) US9163626B2 (ja)
EP (1) EP2459879B1 (ja)
JP (1) JP5563078B2 (ja)
CN (1) CN102483057B (ja)
DE (1) DE102009028148A1 (ja)
ES (1) ES2426474T3 (ja)
RU (1) RU2543106C2 (ja)
WO (1) WO2011012362A2 (ja)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104136779B (zh) 2012-02-27 2016-10-26 麦格纳动力系巴德霍姆堡有限责任公司 泵装置
WO2014143303A1 (en) * 2013-03-14 2014-09-18 Allison Transmission, Inc. Electric pump for a hybrid vehicle
ITUB20155909A1 (it) * 2015-11-25 2017-05-25 Bosch Gmbh Robert Pompa ad ingranaggi
DE102016200013B4 (de) * 2016-01-04 2022-11-03 Röchling Automotive SE & Co. KG Pumpe
ITUB20161058A1 (it) * 2016-02-25 2017-08-25 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
ITUA20163309A1 (it) * 2016-05-10 2017-11-10 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
DE102016224898A1 (de) * 2016-12-14 2018-06-14 Zf Friedrichshafen Ag Pumpeneinrichtung für ein Automatikgetriebe
IT201600130258A1 (it) * 2016-12-22 2018-06-22 Bosch Gmbh Robert Pompa elettrica a ingranaggi
IT201600130240A1 (it) * 2016-12-22 2018-06-22 Bosch Gmbh Robert Pompa elettrica a ingranaggi
IT201600130278A1 (it) * 2016-12-22 2018-06-22 Bosch Gmbh Robert Pompa elettrica a ingranaggi
EP3382888B1 (en) * 2017-03-31 2020-06-17 Grundfos Holding A/S Pump assembly and controlling method
CN107905997B (zh) * 2017-10-19 2019-03-08 浙江大学 一种耐磨损的水液压内啮合齿轮泵的齿圈结构
US10927833B2 (en) * 2018-05-15 2021-02-23 Schaeffler Technologies AG & Co. KG Integrated eccentric motor and pump assembly
IT201800006043A1 (it) * 2018-06-05 2019-12-05 Metodo di assemblaggio di una pompa ad ingranaggi
CN111677662A (zh) * 2019-08-13 2020-09-18 涌镇液压机械（上海）有限公司 由外转子驱动吸油的液压泵
DE102022129887A1 (de) 2022-11-11 2024-05-16 Schaeffler Technologies AG & Co. KG Gerotor-Elektropumpe mit im Außenzahnrad integriertem Rotor

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US4750847A (en) * 1987-09-03 1988-06-14 Quadion Corporation L-shaped bearing assembly
JPH01174584U (ja) * 1988-05-27 1989-12-12
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DE19651683A1 (de) * 1996-12-12 1998-06-18 Otto Eckerle Füllstücklose Innenzahnradpumpe
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DE10248933C1 (de) * 2002-10-19 2003-12-11 Pumpenfabrik Ernst Scherzinger Innen-Zahnradpumpe mit einem verzahnten Hohlrad und einem damit kämmenden Laufrad
JP2004232578A (ja) * 2003-01-31 2004-08-19 Koyo Seiko Co Ltd 電動トロコイドポンプ
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DE10359820A1 (de) * 2003-12-19 2005-07-21 Siemens Ag Einrichtung zum Fixieren einer Magnetschiene eines elektrischen Linearmotors an einem Träger
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Also Published As

Publication number Publication date
DE102009028148A1 (de) 2011-02-03
EP2459879A2 (de) 2012-06-06
US20120171061A1 (en) 2012-07-05
WO2011012362A3 (de) 2011-12-22
CN102483057B (zh) 2015-05-20
ES2426474T3 (es) 2013-10-23
RU2012107226A (ru) 2013-09-10
RU2543106C2 (ru) 2015-02-27
JP5563078B2 (ja) 2014-07-30
US9163626B2 (en) 2015-10-20
WO2011012362A2 (de) 2011-02-03
JP2013500428A (ja) 2013-01-07
CN102483057A (zh) 2012-05-30

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