EP2724028A2 - Pompe à engrenages à denture intérieure - Google Patents

Pompe à engrenages à denture intérieure

Info

Publication number
EP2724028A2
EP2724028A2 EP12716442.4A EP12716442A EP2724028A2 EP 2724028 A2 EP2724028 A2 EP 2724028A2 EP 12716442 A EP12716442 A EP 12716442A EP 2724028 A2 EP2724028 A2 EP 2724028A2
Authority
EP
European Patent Office
Prior art keywords
internal gear
gear pump
filler
sealing element
inner part
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.)
Withdrawn
Application number
EP12716442.4A
Other languages
German (de)
English (en)
Inventor
Rene Schepp
Norbert Alaze
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 EP2724028A2 publication Critical patent/EP2724028A2/fr
Withdrawn legal-status Critical Current

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
    • F04C2/10—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
    • F04C2/101—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 with a crescent-shaped filler element, located between the inner and outer intermeshing members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/48—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
    • 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
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0007—Radial sealings for working fluid
    • F04C15/0019—Radial sealing elements specially adapted for intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
    • 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
    • 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

Definitions

  • the invention relates to an internal gear pump, in particular for a hydraulic vehicle brake system having the features of the preamble of claim 1.
  • Such internal gear pumps are used instead of commonly used piston pumps in slip-controlled and / or Fremdenergy vehicle brake systems, and often, although not necessarily apt as Recirculating pumps called.
  • the internal gear pump has a crescent-shaped clearance between the pinion and the ring gear, in which a filler is arranged.
  • the filler is normally pivotable about an axis parallel to the axis of the internal gear pump. Due to the curved shape of the filler is also called sickle, internal gear pumps with such a filler are also referred to as sickle pumps.
  • On a hollow round inside of the filler are tooth tips of teeth of the pinion and on an outwardly curved outside the filler are tooth tips of the ring gear on. With a driven gear pump, the tooth tips of the teeth of the pinion and the ring gear slide along the inside and the outside of the filler.
  • the filler circumferentially spaces between the teeth of the pinion and between the teeth of the ring gear, so that fluid volumes are trapped in the spaces between the teeth of the pinion and the ring gear, by the rotational drive of the pinion and the ring gear from a pump inlet to a Pump outlet be promoted.
  • the pump inlet forms a suction side and the pump outlet forms a pressure side of the internal gear pump.
  • the patent EP 1 760 315 A2 discloses such an internal gear pump whose filler is divided in the circumferential direction and has an inner part called a segment carrier and an outer part called a segment. Between the inner part and the outer part arranged leaf springs press the inner part and the outer part radially apart and against the tooth tips of the teeth of the pinion and the ring gear, in order to achieve a good contact with the tooth tips and thus a good sealing effect, the prerequisite for high efficiency Internal gear pump is. If the internal gear pump builds a pressure during operation, this pressure acts on a gap or gap between the inner part and the outer part of the filler. The pressure build-up in the operation of the internal gear pump presses the inner and outer parts of the filler of the known internal gear pump in addition to the leaf springs and against the tooth tips of the teeth of the pinion and the ring gear and thereby improves the sealing effect.
  • the known internal gear pump on axial plates, which are arranged rotationally fixed and axially movable on both sides of the gears and the filler.
  • the axial plates are on the gears and the filler facing away outer sides with a pressure of the conveyed fluid from a pressure side, d. H. an outlet, the inner gear pump applied and thereby pressed inwardly against the gears and the filler of the internal gear pump to seal there.
  • the known internal gear pump has many expensive components and their assembly is expensive. For small dimensions for an interior Gear pump of a hydraulic vehicle brake system is hardly achievable with economically feasible effort a precision of the components, which is necessary for a good volumetric efficiency.
  • the filler of the internal gear pump according to the invention with the features of claim 1 has an inner part and an outer part. On an inner side of the inner part are tooth tips of teeth of the pinion of the internal gear pump and on an outer side of the outer part tooth heads of teeth of the ring gear of the internal gear pump. Between the inner part and the outer part, an axial sealing element is arranged, which consists in particular of an elastomer and seals sides of the filler, ie between the filler and axial plates of the internal gear pump, provided that it has the axial plates.
  • Axial plates present seals the sealing element to the inner end faces of a pump housing or a pump chamber from which abut the gears and the filler of the internal gear pump.
  • the invention improves a seal between a suction and a pressure side, d. H. between an inlet and an outlet of the internal gear pump, thereby increasing their
  • FIGURE shows a side view of an internal gear pump according to the invention.
  • inventive internal gear pump 1 is provided as a hydraulic or so-called.
  • Recirculation pump in a hydraulic, a slip control vehicle brake system It has a pinion 2, so an externally toothed gear wheel, which is rotatably mounted on a pump shaft 3.
  • the pinion 2 is arranged eccentrically in an internally toothed ring gear 4 which is rotatably received in a pump housing 5. Housing covers are not drawn so that the inner parts of the internal gear pump 1 are visible.
  • the pinion 2 is in a peripheral portion with the ring gear 4. By rotary drive of the pinion 2 with the pump shaft 3, the ring gear 4 is driven in rotation, so that the internal gear pump 1 in known per se
  • the pinion 2 and the ring gear 4 are also referred to as gears 2, 4 of the internal gear pump 1.
  • the peripheral portion, in which the gears 2, 4 would come together, the internal gear pump 1 has a crescent-shaped space 6 between the
  • Pinion 2 and the ring gear 4 which can also be referred to as a pump room.
  • One of the two holes forms a pump inlet 7, the other a pump outlet 8.
  • the pump inlet 7 can also be considered as the suction side and the pump outlet 8 as the pressure side of the internal gear pump 1 become.
  • a filling piece 9 is arranged in the free space 6, which due to its shape is often referred to as a sickle or sickle piece.
  • the filler 9 separates a suction and inlet side of the free space 6 from a pressure and outlet side.
  • the filler 9 has an outer part 10 and an inner part 11.
  • the outer part 10 and the inner part 11 are circular arc-shaped corresponding to head circles of the gears 2, 4.
  • An outer side of the outer part 10 is located on tooth tips of teeth of the ring gear 4 and an inner side of the inner part 11 abuts against tooth tips of teeth of the pinion 2.
  • Outer part 10 is angled radially inwardly at a suction end and forms a yoke 12 of the filler 9. Instead, the inner part 1 1 could be angled radially outwardly at its suction end.
  • the filler 9 On the suction side, the filler 9 is supported with its yoke 12 on a stop pin 13 from which the free space 6 on the suction side of the filler 9 parallel to the pump shaft 3 interspersed.
  • the outer part 10 and the inner part 1 1 are bent sheet metal parts, they are made of metal strips by bending.
  • an axial sealing element 14 is arranged, which consists of an elastomer.
  • the axial sealing element 14 in side view U-shaped, it has a relatively massive yoke portion 15 and two legs 16, 17.
  • solid is meant that the yoke portion 15 extends relatively far from the yoke 12 of the filler 9 in the direction of the pressure side of the internal gear pump 1, in the illustrated embodiment of the invention, the extent of the yoke 15 in the circumferential direction is about as large as a radial distance of the head circles of the gears 2, 4 at the location of the yoke portion 15 of the axial sealing member 14.
  • the legs 16, 17 of the axial sealing member 14 extend integrally from the yoke portion 15 along an inner side of the outer part 10 and the outer side of the inner part 1 1 of the filler 9, wherein the legs 16, 17 of the sealing element
  • the axial sealing element 14 is connected to the outer part 10 and the inner part 1 1 of the filler 9, for example glued.
  • the sealing element 14 is vulcanized onto the outer part 16 and the inner part 17.
  • the outer part 10 and the inner part 11 of the filler 9 can be inserted for producing the sealing element 14 as shaping elements in, for example, an injection mold, so that the production of the sealing element 14 and the connection with the outer part 10 and the inner part 11 takes place in a single manufacturing step.
  • the axial sealing element 14 may also be manufactured by itself and then connected to the outer part 10 and the inner part 1 1 of the filler 9.
  • the sealing element 14 connects the outer part 10 and the inner part 1 1 with each other.
  • the massive yoke region 15 of the sealing element 14 presses the outer part 10 and the inner part 11 apart, d. H. the outer part 10 outwardly against the tooth tips of the teeth of the ring gear
  • the axial sealing element 14 bears laterally sealingly.
  • the loading of the cavity 18 between the legs 16, 17 of the sealing element 14 with the pressure from the pressure side of the internal gear pump 1 presses the legs 16, 17 radially, whereby the legs 16, 17 press laterally outwards, which the lateral sealing effect of the axial sealing element 14 improves with increasing delivery pressure of the internal gear pump 1.
  • the axial sealing element 14 ensures a good sealing effect both with pressureless internal gear pump 1 and during operation.
  • the internal gear pump 1 has on both sides of axial plates 19 which are axially movable and which are penetrated by the pump shaft 3 and the stopper pin 13 and thereby held against rotation.
  • the front axial plate is not drawn because it would obstruct the view.
  • the axial plates 19 in approximately the shape of circle segments which are higher than their radius.
  • a radius of the axial plates 19 is smaller than an outer radius of the ring gear 4 and larger than a réelle Vietnameseradius of the ring gear 4, so that the axial plates 19 tooth spaces between the teeth of the gears 2, 4 overlap.
  • the axial plates 19 completely cover the filling piece 9 and the free space 6 between the toothed wheels 2, 4 on the pressure side of the internal gear pump 1 and partially on the suction side, so that the pump inlet 7 remains free.
  • the axial disks 19 are acted upon by the pressure of the pump outlet 8, ie with the pressure from the pressure side of the internal gear pump 1 and are thereby in sealing contact with the end faces of the gear wheels 2, 4 and pressed or held the sides of the axial sealing element 14 in the filler 9.
  • the axial sealing element 14 makes, as already stated, the axial plates 19, which are provided for an axial compensation, dispensable, even if the axial plates 19 in the drawn and described embodiment of the invention are present.
  • the axial sealing element 14 allows lateral sealing of the filler 9 without axial compensation to rigid, inner, the gears 2, 4 and the filler 9 facing end faces of the pump housing 5 and on the not shown housing cover.
  • One of the two axial plates 19 has a punched and inwards, d. H. between the two gears 2, 4 bent tab, which forms an abutment 20 for the filler 9.
  • the abutment 20 is located at a pressure-side end of the outer part 10 and the inner part 11 of the filler 9 and secures the filler 9 against movement in the direction of the pressure side.
  • a punching 21, from which the abutment 21 is bent inwardly communicates the pressure range of the free space 6 with the pump outlet 8.
  • the abutment 20 forming tab is formed by bending inward, ie by forming, on an axial plate 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

L'invention concerne une pompe à engrenages à denture intérieure (1) en tant que pompe de refoulement pour un circuit de freinage d'un véhicule. L'invention propose de réaliser une pièce intercalaire (9) dotée de deux éléments pliés (10, 11) en tôle qui sont reliés par un élément d'étanchéité axial (14) fixé par vulcanisation et, vu de côté, en forme de U. L'élément d'étanchéité axial (14) améliore un rendement de la pompe à engrenages à denture intérieure (1) et permet des tolérances de fabrication plus importantes.
EP12716442.4A 2011-06-24 2012-04-25 Pompe à engrenages à denture intérieure Withdrawn EP2724028A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011078064A DE102011078064A1 (de) 2011-06-24 2011-06-24 Innenzahnradpumpe
PCT/EP2012/057538 WO2012175236A2 (fr) 2011-06-24 2012-04-25 Pompe à engrenages à denture intérieure

Publications (1)

Publication Number Publication Date
EP2724028A2 true EP2724028A2 (fr) 2014-04-30

Family

ID=45999843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12716442.4A Withdrawn EP2724028A2 (fr) 2011-06-24 2012-04-25 Pompe à engrenages à denture intérieure

Country Status (5)

Country Link
US (1) US20140119973A1 (fr)
EP (1) EP2724028A2 (fr)
KR (1) KR20140031331A (fr)
DE (1) DE102011078064A1 (fr)
WO (1) WO2012175236A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200485265Y1 (ko) * 2016-07-05 2017-12-13 훌루테크 주식회사 내접기어펌프
GB2588752B (en) * 2019-10-21 2022-06-15 Delphi Tech Ip Ltd Fuel pump assembly
WO2021126766A1 (fr) * 2019-12-17 2021-06-24 Cummins Inc. Croissant flexible pour pompe à carburant basse pression

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1653818A1 (de) * 1967-02-28 1971-06-09 Daimler Benz Ag Innenverzahnte Zahnradpumpe,insbesondere fuer die Druckmittelversorgung von selbsttaetig schaltenden Kraftfahrzeuggetrieben
DE2942417A1 (de) * 1979-10-19 1981-05-14 Otto Eckerle GmbH & Co KG, 7502 Malsch Innenzahnradmaschine
DE19854155B4 (de) * 1997-12-03 2012-04-26 Schaeffler Technologies Gmbh & Co. Kg Hydraulische Zahnradmaschine
DE19858483A1 (de) * 1998-12-18 2000-08-31 Mannesmann Rexroth Ag Hydraulische Verdrängermaschine, insbesondere Verdrängerpumpe
DE102005041579B4 (de) 2005-09-01 2015-06-11 Bosch Rexroth Aktiengesellschaft Innenzahnradpumpe mit Füllstück
DE102007049704B4 (de) * 2007-10-17 2019-01-31 Robert Bosch Gmbh Innenzahnradpumpe für eine Bremsanlage
DE102009047643A1 (de) * 2009-12-08 2011-06-09 Robert Bosch Gmbh Innenzahnradpumpen für eine hydraulische Fahrzeugbremsanlage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012175236A2 *

Also Published As

Publication number Publication date
KR20140031331A (ko) 2014-03-12
WO2012175236A2 (fr) 2012-12-27
CN103635690A (zh) 2014-03-12
DE102011078064A1 (de) 2012-12-27
WO2012175236A3 (fr) 2013-07-18
US20140119973A1 (en) 2014-05-01

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