EP2459879A2 - Gear pump - Google Patents
Gear pumpInfo
- Publication number
- EP2459879A2 EP2459879A2 EP10724490A EP10724490A EP2459879A2 EP 2459879 A2 EP2459879 A2 EP 2459879A2 EP 10724490 A EP10724490 A EP 10724490A EP 10724490 A EP10724490 A EP 10724490A EP 2459879 A2 EP2459879 A2 EP 2459879A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- stator
- gear pump
- toothed ring
- layer
- 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.)
- Granted
Links
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.
- 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 the direct motoring of the rotor.
- the problem with such configurations is the bearing of the toothed ring, which must take over the driving torque of the electric motor.
- EP 1 600 635 A2 describes an internal gear pump which has a pump section with an inner rotor formed on its outer periphery with teeth.
- An outer rotor has on its inner
- a gear pump for conveying a fluid with a rotatably mounted externally toothed gear and an internally toothed ring are provided, which are in mesh for generating a conveying effect, 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 generate an electromagnetic force, and wherein the toothed ring has a closed, homogeneous cylindrical surface and a sliding bearing is provided on the stator.
- 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 engine and in the toothed ring holes or special recesses are introduced to form by field weakening magnetic poles.
- 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 mecanicariaffyrad- or ring gear pump.
- the plain bearing serves primarily as a wear protection layer between see stator and rotor. In addition, the plain bearing provides a centering function for the
- Rotor ready and can reduce or prevent axial gap losses with appropriate design. This improves the efficiency of the electric motor.
- 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. It is even more preferable if the layer is designed with an extension, so that the stator rests against an inner wall of the housing with a bias voltage. In particular, 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.
- FIG. 1 shows a section through an internal gear pump according to the prior art
- FIG. 2 shows a cross section through an internal gear pump according to an embodiment.
- Fig. 1 shows a section through an internal gear pump 1 according to the prior art.
- the internal gear pump 1 comprises a gear pair, which consists of an internally toothed ring gear 2 and an externally toothed gear wheel 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 for the
- 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 1 1 is provided (permanent magnet motor). If the electric motor is alternatively designed as a reluctance motor, then, instead of the magnets, 1 1 holes (not shown here) are provided for weakening the field.
- 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 plain bearing 13 serves primarily as a wear protection layer between the stator 7 and the rotor or the toothed ring 2.
- the sliding bearing 13 has a centering function for the rotor or the toothed ring 2 and can reduce or prevent axial gap losses with a corresponding design, as will be explained in more detail in connection with FIG. 3.
- 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 or injected into the stator 7, as a layer with a thickness of less than 0.3 mm is formed, which is designed axially in the direction of an inner wall 14 of the housing 5 with an extension 15 such that a bias voltage 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009028148A DE102009028148A1 (en) | 2009-07-31 | 2009-07-31 | gear pump |
PCT/EP2010/057820 WO2011012362A2 (en) | 2009-07-31 | 2010-06-04 | Gear pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2459879A2 true EP2459879A2 (en) | 2012-06-06 |
EP2459879B1 EP2459879B1 (en) | 2013-08-14 |
Family
ID=43402326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10724490.7A Not-in-force EP2459879B1 (en) | 2009-07-31 | 2010-06-04 | Gear pump |
Country Status (8)
Country | Link |
---|---|
US (1) | US9163626B2 (en) |
EP (1) | EP2459879B1 (en) |
JP (1) | JP5563078B2 (en) |
CN (1) | CN102483057B (en) |
DE (1) | DE102009028148A1 (en) |
ES (1) | ES2426474T3 (en) |
RU (1) | RU2543106C2 (en) |
WO (1) | WO2011012362A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201600130240A1 (en) * | 2016-12-22 | 2018-06-22 | Bosch Gmbh Robert | GEAR ELECTRIC PUMP |
IT201600130258A1 (en) * | 2016-12-22 | 2018-06-22 | Bosch Gmbh Robert | GEAR ELECTRIC PUMP |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104136779B (en) | 2012-02-27 | 2016-10-26 | 麦格纳动力系巴德霍姆堡有限责任公司 | Pump installation |
KR102225785B1 (en) * | 2013-03-14 | 2021-03-11 | 알리손 트랜스미션, 인크. | Electric pump for a hybrid vehicle |
ITUB20155909A1 (en) * | 2015-11-25 | 2017-05-25 | Bosch Gmbh Robert | GEAR PUMP |
DE102016200013B4 (en) * | 2016-01-04 | 2022-11-03 | Röchling Automotive SE & Co. KG | pump |
ITUB20161058A1 (en) * | 2016-02-25 | 2017-08-25 | Bosch Gmbh Robert | PUMPING GROUP FOR FUEL SUPPLEMENTATION, PREFERABLY GASOIL, TO AN INTERNAL COMBUSTION ENGINE |
ITUA20163309A1 (en) * | 2016-05-10 | 2017-11-10 | Bosch Gmbh Robert | PUMPING GROUP FOR FUEL SUPPLEMENTATION, PREFERABLY GASOIL, TO AN INTERNAL COMBUSTION ENGINE |
DE102016224898A1 (en) * | 2016-12-14 | 2018-06-14 | Zf Friedrichshafen Ag | Pumping device for an automatic transmission |
IT201600130278A1 (en) * | 2016-12-22 | 2018-06-22 | Bosch Gmbh Robert | GEAR ELECTRIC PUMP |
EP3382888B1 (en) * | 2017-03-31 | 2020-06-17 | Grundfos Holding A/S | Pump assembly and controlling method |
CN107905997B (en) * | 2017-10-19 | 2019-03-08 | 浙江大学 | A kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics |
US10927833B2 (en) * | 2018-05-15 | 2021-02-23 | Schaeffler Technologies AG & Co. KG | Integrated eccentric motor and pump assembly |
IT201800006043A1 (en) * | 2018-06-05 | 2019-12-05 | METHOD OF ASSEMBLING A GEAR PUMP | |
CN111677662A (en) * | 2019-08-13 | 2020-09-18 | 涌镇液压机械(上海)有限公司 | Hydraulic pump driven by outer rotor to absorb oil |
DE102022129887A1 (en) | 2022-11-11 | 2024-05-16 | Schaeffler Technologies AG & Co. KG | Gerotor electric pump with rotor integrated in the external gear |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
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US2345975A (en) * | 1938-12-24 | 1944-04-04 | Vickers Inc | Power transmission pump or motor |
US2761078A (en) * | 1952-03-29 | 1956-08-28 | Wetmore Hodges | Electrical motor pump or compressor |
CH647048A5 (en) * | 1980-07-11 | 1984-12-28 | Maag Zahnraeder & Maschinen Ag | GEAR PUMP. |
US4750847A (en) * | 1987-09-03 | 1988-06-14 | Quadion Corporation | L-shaped bearing assembly |
JPH01174584U (en) * | 1988-05-27 | 1989-12-12 | ||
US5145329A (en) * | 1990-06-29 | 1992-09-08 | Eaton Corporation | Homoplanar brushless electric gerotor |
US5169242A (en) * | 1990-11-27 | 1992-12-08 | General Motors Corporation | Turbocharger assembly and stabilizing journal bearing therefor |
US6053705A (en) * | 1996-09-10 | 2000-04-25 | Sulzer Electronics Ag | Rotary pump and process to operate it |
DE19651683A1 (en) * | 1996-12-12 | 1998-06-18 | Otto Eckerle | Internal gear pump without filler |
JPH11210642A (en) * | 1998-01-20 | 1999-08-03 | Zexel:Kk | Internal gear pump |
DE10248933C1 (en) * | 2002-10-19 | 2003-12-11 | Pumpenfabrik Ernst Scherzinger | Electrically-driven internal cogwheel pump has casing screening stator of electric motor from internally toothed hollow wheel and cooperating externally toothed wheel pressed against bearing pin for latter |
JP2004232578A (en) * | 2003-01-31 | 2004-08-19 | Koyo Seiko Co Ltd | Electric trochoid pump |
JP4245997B2 (en) * | 2003-07-07 | 2009-04-02 | 直樹 宮城 | Small gear pump |
JP2005098268A (en) | 2003-09-26 | 2005-04-14 | Koyo Seiko Co Ltd | Electric internal gear pump |
DE10359820A1 (en) | 2003-12-19 | 2005-07-21 | Siemens Ag | Device for fixing a magnetic rail of an electric linear motor to a carrier |
US7137793B2 (en) | 2004-04-05 | 2006-11-21 | Peopleflo Manufacturing, Inc. | Magnetically driven gear pump |
JP4272112B2 (en) | 2004-05-26 | 2009-06-03 | 株式会社日立製作所 | Motor-integrated internal gear pump and electronic equipment |
US20060039815A1 (en) * | 2004-08-18 | 2006-02-23 | Allan Chertok | Fluid displacement pump |
JP2007009787A (en) * | 2005-06-30 | 2007-01-18 | Hitachi Ltd | Motor-integrated internal gear pump and electronic equipment |
DE102006007554A1 (en) | 2006-02-16 | 2007-08-23 | Hydraulik-Ring Gmbh | Feed pump for a urea solution, to treat heavy vehicle motor exhaust gases, is an electromotor with an integrated gear pump of two meshing cogwheels rotated by a magnetic field |
DE102007060906B3 (en) * | 2007-12-14 | 2009-10-15 | Ab Skf | Bearing arrangement for a carrying roller |
-
2009
- 2009-07-31 DE DE102009028148A patent/DE102009028148A1/en not_active Withdrawn
-
2010
- 2010-06-04 US US13/387,412 patent/US9163626B2/en not_active Expired - Fee Related
- 2010-06-04 ES ES10724490T patent/ES2426474T3/en active Active
- 2010-06-04 JP JP2012522052A patent/JP5563078B2/en not_active Expired - Fee Related
- 2010-06-04 CN CN201080038547.0A patent/CN102483057B/en not_active Expired - Fee Related
- 2010-06-04 WO PCT/EP2010/057820 patent/WO2011012362A2/en active Application Filing
- 2010-06-04 EP EP10724490.7A patent/EP2459879B1/en not_active Not-in-force
- 2010-06-04 RU RU2012107226/06A patent/RU2543106C2/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2011012362A3 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201600130240A1 (en) * | 2016-12-22 | 2018-06-22 | Bosch Gmbh Robert | GEAR ELECTRIC PUMP |
IT201600130258A1 (en) * | 2016-12-22 | 2018-06-22 | Bosch Gmbh Robert | GEAR ELECTRIC PUMP |
WO2018114619A1 (en) * | 2016-12-22 | 2018-06-28 | Robert Bosch Gmbh | Electric gear pump |
WO2018114622A1 (en) * | 2016-12-22 | 2018-06-28 | Robert Bosch Gmbh | Electric gear pump |
Also Published As
Publication number | Publication date |
---|---|
EP2459879B1 (en) | 2013-08-14 |
US20120171061A1 (en) | 2012-07-05 |
WO2011012362A3 (en) | 2011-12-22 |
ES2426474T3 (en) | 2013-10-23 |
CN102483057B (en) | 2015-05-20 |
JP2013500428A (en) | 2013-01-07 |
JP5563078B2 (en) | 2014-07-30 |
CN102483057A (en) | 2012-05-30 |
DE102009028148A1 (en) | 2011-02-03 |
US9163626B2 (en) | 2015-10-20 |
WO2011012362A2 (en) | 2011-02-03 |
RU2543106C2 (en) | 2015-02-27 |
RU2012107226A (en) | 2013-09-10 |
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