WO2014001138A2 - Pompe à engrenage - Google Patents

Pompe à engrenage Download PDF

Info

Publication number
WO2014001138A2
WO2014001138A2 PCT/EP2013/062571 EP2013062571W WO2014001138A2 WO 2014001138 A2 WO2014001138 A2 WO 2014001138A2 EP 2013062571 W EP2013062571 W EP 2013062571W WO 2014001138 A2 WO2014001138 A2 WO 2014001138A2
Authority
WO
WIPO (PCT)
Prior art keywords
pump
shaft
gear pump
gear
drive shaft
Prior art date
Application number
PCT/EP2013/062571
Other languages
German (de)
English (en)
Other versions
WO2014001138A3 (fr
Inventor
Rene Schepp
Edgar Kurz
Norbert Alaze
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
Priority to JP2015518971A priority Critical patent/JP6086979B2/ja
Publication of WO2014001138A2 publication Critical patent/WO2014001138A2/fr
Publication of WO2014001138A3 publication Critical patent/WO2014001138A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/02—Arrangements of bearings
    • 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
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
    • 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
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/52—Bearings for assemblies with supports on both sides

Definitions

  • the invention relates to a gear pump with the features of the preamble of claim 1, which is provided for a hydraulic vehicle brake system.
  • the published patent application DE 10 2009 047 626 A1 discloses an internal gear pump for a hydraulic vehicle brake system.
  • the internal gear pump has an internally toothed gear designated as a ring gear and an externally toothed gear designated as a pinion, which is arranged eccentrically in the ring gear in such a way that it meshes with the ring gear.
  • the pinion and the ring gear may also be referred to as gears of the internal gear pump.
  • the known réellebianradpumpe Axialusionn on both sides of the gears which are rotationally held and axially movable and are pressed by applying pressure in pressure fields on the outer side facing away from the gears against end faces of the gears. Comparable
  • axial discs are also referred to as pressure or control plates. It does not depend on a disc shape but on the function of the lateral sealing of the gears of the gear pump.
  • Axial discs are pressurized, extend approximately over a pressure range of a sickle-shaped pump space between the gears of the internal gear pump.
  • the known internal gear pump has a separating piece in the crescent-shaped pump space between the toothed wheels, which separates a suction region from a pressure region in the pump chamber.
  • Such separators are also known as segment pieces, filler pieces or due to their typical chelated as sickles or sickle pieces.
  • the gear pump according to the invention can also be designed without a separator, it is then also referred to as a gerotor pump.
  • the pinion of the known internal gear pump is rotatably mounted on a pump shaft which is radially slidably mounted on both sides of the gears in bearing bushes.
  • Both ends of the pump shaft are subjected to the same pressure, so that no axial force results.
  • a drive shaft which can also be referred to as an intermediate shaft and which can be driven by an electric motor as a pump motor.
  • the drive shaft is arranged coaxially to the pump shaft and rotatably connected via a square as a torsionally rigid form-locking coupling with the pump shaft.
  • the drive shaft is rotatably mounted with a radial ball bearing and sealed between the ball bearing and the pump shaft with a radial shaft seal. Radial play of the square of the drive shaft in a complementary
  • Inner square of the pump shaft increases seal and bearing wear, increases drive power and thereby reduces efficiency of the internal gear pump and causes running noise.
  • the gear pump according to the invention with the features of claim 1 has a pump shaft, on which a gear of the gear pump is arranged rotatably, and a drive shaft for the rotary drive of the pump shaft with a
  • the drive shaft is not only rotationally fixed and axially movable, but also radially fixed to the pump shaft.
  • the drive shaft is thereby rotatably radially mounted on its pump-side end.
  • the invention increases a smoothness of the gear pump and reduces one
  • the gear pump according to the invention may be an external gear pump, preferably it is an internal gear pump (claim 7).
  • the internal gear pump according to the invention is provided in particular as a hydraulic pump for a hydraulic, slip-controlled and / or external power vehicle brake system.
  • hydro pumps are also referred to as return pumps and today are predominantly as
  • FIGURE shows an internal gear pump according to the invention in axial section.
  • the gear pump according to the invention shown in the drawing is an internal gear pump 1, which is provided for a hydraulic, slip-controlled or foreign energy vehicle brake system.
  • the internal gear pump 1 has a pump shaft 2 on which a pinion 3 is arranged which meshes with a ring gear 4 at a circumferential point or in a peripheral section.
  • the pinion 3 is an externally toothed gear, which is non-rotatable with the pump shaft 2.
  • the pinion 3 is integral with the pump shaft 2.
  • other possibilities come into consideration, for example pressing the pinion 2 onto the pump shaft 3, a multi-tooth profile, a keyway connection, etc.
  • the ring gear 4 is an internally toothed gear , It surrounds the pump shaft 2 and the pinion 3 axially parallel and eccentric, so that it meshes with the pinion 3 in a peripheral portion as already mentioned.
  • the pinion 3 is driven in rotation and drives the ring gear 4 rotationally, whereby in a conventional manner fluid, in a hydraulic vehicle brake system of brake fluid is promoted.
  • the separator 8 is pivotally mounted on a pin 28 which passes through the separator 8 axially parallel and is held in blind holes in a pump housing. Teeth of teeth of the pinion 3 and the ring gear 4 are on the inside or outside of the separator 8 or slide in rotary drive of the internal gear pump 1 on an inner or outer side of the separator 8 along.
  • the separator 8 closes interdental spaces between the teeth of the pinion 3 and between the teeth of the ring gear 4 at the periphery, so that the rotary drive of the pinion 3 and the ring gear 4 promotes brake fluid.
  • the pinion 3 and the ring gear 4 are sealed with sealingly abutting them, rotationally fixed and axially movable axial discs 9 sealed.
  • the internal gear pump 1 is arranged in a stepped blind hole 10 of a hydraulic block 1 1 of the hydraulic vehicle brake system, which can be understood as a pump housing.
  • Such hydraulic blocks 11 are known in slip-controlled vehicle brake systems, in addition to hydraulic pumps, in the present case the internal gear pump 1, further hydraulic components such as solenoid valves, check valves, hydraulic accumulator installed and hydraulically interconnected by bores.
  • the ring gear 4 is pressed into a (sliding) bearing ring 12 which is rotatably mounted in the blind hole 10 of the pump housing forming hydraulic block 1 1.
  • the bearing ring 12 extends axially over both axial discs 9 and the ring gear 4.
  • the blind hole 10 is closed with a housing cover 13, to which then a bearing plate 14 is inserted into the blind hole 10.
  • the pump shaft 2 is rotatably mounted with plain bearings 15, one of which is pressed in a portion of the stepped blind hole 10 in which the pump housing forming hydraulic block 1 1 and the other in a bearing bore 16 in the housing cover 13. Both slide bearings 15 protrude axially into central holes 17 of the axial disks 9. Brake fluid from a pump inlet or from a suction region of the internal gear pump 1 acts on both ends 18 of the pump shaft 2 equally. At both ends 18 of the pump shaft 2, the same pressure prevails, the front ends 18 of the pump shaft 2 are subjected to the same pressure. Axial forces, which causes the pressurization of the front ends 18 of the pump shaft 2 cancel each other due to the same pressure at the two ends 18 of the pump shaft 2, so that the pump shaft 2 is free of axial force, they must not be axially supported.
  • the pump shaft 2 is rotatably connected by a form-locking coupling 19 with a drive shaft 20.
  • the form-locking coupling 19 allows an axial movement between the drive shaft 20 and the pump shaft 2, so that no axial force between the two shafts 2, 20 is transmitted.
  • the drive shaft 20 has a square pin 21 which engages in a square socket 22 of the pump shaft 2.
  • This design of the form-locking coupling 19 is not mandatory for the invention. Due to the axial mobility of the pump shaft 2, the not only rotationally but also axially fixed pinion 3 can center on the pump shaft 2 between the axial discs 9, whereby the friction is reduced.
  • the drive shaft 20 is rotatably mounted in the bearing plate 14 with a ball bearing 23 and held axially with a locking ring 24.
  • the pump shaft 20 is axially supported by a locking ring 25 on an inner ring of the ball bearing 23.
  • An axial pressurization of the front end of the drive shaft 20, which faces the pump shaft 2 is thus axially supported via the retaining rings 24, 25, the ball bearing 23 and the bearing plate 14.
  • the drive shaft 20 is an intermediate shaft for transmitting a torque from a drive motor, not shown, to the pump shaft
  • the drive motor is preferably an electric motor.
  • To drive the drive shaft 20 has a transverse web 27 on its end facing away from the internal gear pump 1 front end.
  • the shaft seal 26 can be considered as a seal of the drive shaft 20.
  • the retaining rings 24, 25, the ball bearing 23 and the bearing plate 14th form an axial support of the drive shaft 20 against a pressure which acts on one of the pump shaft 2 and the gear pump 1 facing front end of the drive shaft 20.
  • the separator 8 is located in a crescent-shaped space between the pinion 3 and the ring gear 4 of the circumferential point or the peripheral portion opposite, in which the pinion gear 3 and the ring gear 4 mesh.
  • the free space is also referred to as a pump chamber, in which there is a promotion of fluid in the interdental spaces between the teeth of the pinion 3 and the ring gear 4 in the circumferential direction inside and outside of the separator 8 over from a pump inlet to a pump outlet.
  • the pump inlet and the pump outlet open axially parallel through one of the axial discs 9.
  • the pump inlet and the pump outlet are located in front of or behind the cutting plane of the drawing and are therefore not visible in the drawing.
  • Pump inlet, pump outlet and pump chamber are known in internal gear pumps per se and will not be explained in detail here.
  • the drive shaft 20 has a cylindrical portion 29 which rests in the manner of a fit of a shaft in a bore in a cylindrical hole 30 in the pump shaft 2.
  • the cylindrical hole 30 continues into the inner square 22 in the pump shaft 2.
  • the cylindrical portion 29 and the square pin 21 of the drive shaft 20 and the cylindrical hole 30 and the square socket 22 of the pump shaft 2 are located in the sliding bearing 15 of the pump shaft 2.
  • the cylindrical portion 29 in the drive shaft 20 in the cylindrical hole 30 of the pump shaft 2 directs the drive shaft 20 coaxial with the pump shaft 2 and connects the drive shaft 20 by positive engagement radially fixed to the pump shaft 2.
  • the sliding bearing 15 of the pump shaft 2 supports the drive shaft 20 together with the pump shaft 2 radially. A radial movement of the drive shaft 20 is avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Regulating Braking Force (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

L'invention concerne une pompe à engrenage intérieur (1) pour un système de freinage hydraulique de véhicule. L'invention propose de découpler axialement l'arbre (2) de pompe par un arbre d'entraînement (20) entre un moteur d'entraînement et la pompe à engrenage intérieur (1) et de monter radialement l'arbre d'entraînement (20) avec l'arbre (2) de pompe dans un palier lisse (15). L'invention vise une pompe à engrenage intérieur (1) fonctionnant en douceur à sollicitation moindre du palier et faible usure des joints d'étanchéité.
PCT/EP2013/062571 2012-06-29 2013-06-18 Pompe à engrenage WO2014001138A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015518971A JP6086979B2 (ja) 2012-06-29 2013-06-18 ギヤポンプ

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102012211331.2 2012-06-29
DE102012211331 2012-06-29
DE201210212668 DE102012212668A1 (de) 2012-06-29 2012-07-19 Zahnradpumpe
DE102012212668.6 2012-07-19

Publications (2)

Publication Number Publication Date
WO2014001138A2 true WO2014001138A2 (fr) 2014-01-03
WO2014001138A3 WO2014001138A3 (fr) 2014-05-15

Family

ID=49754187

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/062571 WO2014001138A2 (fr) 2012-06-29 2013-06-18 Pompe à engrenage

Country Status (3)

Country Link
JP (1) JP6086979B2 (fr)
DE (1) DE102012212668A1 (fr)
WO (1) WO2014001138A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018099636A1 (fr) * 2016-11-30 2018-06-07 Robert Bosch Gmbh Générateur de pression à force extérieure électro-hydraulique

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015210798B4 (de) * 2015-06-12 2017-12-21 Continental Automotive Gmbh Kraftstoffhochdruckpumpe
DE102016214762A1 (de) * 2016-08-09 2018-02-15 Robert Bosch Gmbh Außenzahnradmaschine
DE102019118697A1 (de) * 2019-07-10 2021-01-14 Ipgate Ag Zahnradpumpe
DE102020118012A1 (de) 2020-07-08 2022-01-13 Nidec Gpm Gmbh Pumpe zur Förderung eines Fluids

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009047626A1 (de) 2009-12-08 2011-06-09 Robert Bosch Gmbh Zahnradpumpe

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS486467U (fr) * 1971-06-04 1973-01-24
JPS5315105U (fr) * 1976-07-20 1978-02-08
JP3899785B2 (ja) * 1999-07-09 2007-03-28 株式会社デンソー 車両用ブレーキ装置
GB0809966D0 (en) * 2008-06-02 2008-07-09 Artificial Lift Co Ltd Drive means
DE102008063983A1 (de) * 2008-12-19 2010-07-01 Dürr Systems GmbH Pumpe zum Fördern eines Fluids, insbesondere Dosierpumpe
DE102011075278A1 (de) * 2010-07-16 2012-02-23 Baumüller Nürnberg GmbH Pumpenaggregat

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009047626A1 (de) 2009-12-08 2011-06-09 Robert Bosch Gmbh Zahnradpumpe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018099636A1 (fr) * 2016-11-30 2018-06-07 Robert Bosch Gmbh Générateur de pression à force extérieure électro-hydraulique
CN109982907A (zh) * 2016-11-30 2019-07-05 罗伯特·博世有限公司 电动液压外力-压力发生器
US11208088B2 (en) 2016-11-30 2021-12-28 Robert Bosch Gmbh Electrohydraulic power pressure generator

Also Published As

Publication number Publication date
WO2014001138A3 (fr) 2014-05-15
DE102012212668A1 (de) 2014-01-02
JP2015528869A (ja) 2015-10-01
JP6086979B2 (ja) 2017-03-01

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