WO2008138655A1 - Système hydraulique comprenant une pompe à roues dentées réversible - Google Patents

Système hydraulique comprenant une pompe à roues dentées réversible Download PDF

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Publication number
WO2008138655A1
WO2008138655A1 PCT/EP2008/052899 EP2008052899W WO2008138655A1 WO 2008138655 A1 WO2008138655 A1 WO 2008138655A1 EP 2008052899 W EP2008052899 W EP 2008052899W WO 2008138655 A1 WO2008138655 A1 WO 2008138655A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear pump
hydraulic system
pump
rotation
gear
Prior art date
Application number
PCT/EP2008/052899
Other languages
German (de)
English (en)
Inventor
Berthold Kaeferstein
Rene Schepp
Tilman Noack
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
Publication of WO2008138655A1 publication Critical patent/WO2008138655A1/fr

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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
    • 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
    • B60T8/40—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/404—Control of the pump unit
    • B60T8/4063—Control of the pump unit involving the direction of fluid flow
    • 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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/04—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for reversible 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
    • 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
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/16—Wear

Definitions

  • the invention is based on a hydraulic system with a gear pump according to the preamble of independent claim 1.
  • a conventional hydraulic system with gear pump for a vehicle brake system with two brake circuits is z. B. in DE 100 65 234 Al described.
  • an electronic control unit for controlling a pressure source is present, wherein the pressure of the pressure source associated with the wheel brake cylinders are to be acted upon.
  • the pressure source also comprises a separating piston unit, by means of which the brake circuits can be fluidly separated from one another. By using the separating piston unit, two brake circuits can be pressurized or supplied with a single gear pump.
  • gear pump Since the gear pump is reversibly driven, it can be used both for brake pressure build-up and for brake pressure reduction.
  • the hydraulic system according to the invention with gear pump according to the features of independent claim 1 has the advantage that the direction of rotation of the gear pump is used to extend the life of the gear pump significantly, the operating time of the gear pump in the ideal case in both directions of rotation is the same length. Since the wear of the tooth flanks in the intermeshing gears, in particular of pumps operating at high pressure level can be considerable and the pressure drop at worn tooth flanks to the functioning of the pump leads, to comply with the life inevitably in only one direction of rotation driven gear pumps constructive a corresponding Ü over-sizing of the gear pump are made, which can be omitted due to the invention. Thus, the gear pump can be interpreted cheaper, consequently significantly more compact and ultimately produce more cost-effective.
  • the direction of rotation of the gear pump can be achieved in a simple manner by switching the direction of rotation of the drive motor.
  • the switching of the direction of rotation of an electric motor can be conveniently done in the simplest case by a manually operated switch.
  • the pumping direction of the gear pump z. B. be changed at every maintenance service.
  • a frequent reversal of the direction of rotation of the gear pump, which can be expected a particularly uniform wear of the teeth is easily with an automatic reversal of rotation by a z. B.
  • time-dependent wiring to realize the z. B. can be initialized by means of an electronic control unit. Instead, it would also be possible, for. B. to provide for each restart of the motor vehicle, an automatic switching of the pump rotation direction.
  • a fluid control circuit can be provided, which, in spite of changing the pump rotation direction, ensures that the hydraulic fluid is always conveyed in one direction from an inflow line to an outflow line of the system.
  • a simple design for the quasi rectifier paths provided with control circuit results from the combination of a ring line with a connecting line between two strands of the loop and a valve assembly.
  • valve assembly which comprises only four check valves.
  • the capacity during operation is a quiet running internal gear pump with filler in both pumping directions equal
  • the filler can be advantageously designed mirror-symmetrically based on its center transverse axis.
  • Fig. 1 a shows a schematic representation of an external gear pump according to the invention in an associated line network in a direction of rotation of the gears.
  • Fig. Ib shows the illustration of FIG. Ia in the reverse direction of rotation of the gears.
  • FIG. 2a shows a schematic representation of an internal gear pump according to the invention in an associated line network in a direction of rotation of the gears. - A -
  • FIG. 2b shows the illustration according to FIG. 2b in the reverse direction of rotation of the toothed wheels.
  • a hydraulic system which is not shown in its entirety comprises a hydraulic system of a wheel-slip-controlled type which is known per se
  • Vehicle brake is, belonging to the piping fluid control circuit 10, in which an external gear pump 11 is integrated.
  • the gear pump 11 is connected between a branching ring line 12 of the fluid control circuit 10, which in turn connects a single inflow line 13 with a single outflow line 14.
  • the fluid control circuit 10 comprises a connection line 15 between the two line branches or line branches of the ring line 12. Before and behind the junction of the connection line 15 in the strands of the ring line 12 is in the ring line 12 each have a check valve sixteenth arranged so that a total of four check valves 16 are in the fluid control circuit 10.
  • the check valves 16 in the ring line 12 are all arranged so that they lock the associated strand in the direction of inflow line 13 and are permeable in the opposite direction after overcoming the valve spring force to be sustained. Which path the fluid takes in the fluid control circuit 10 now depends solely on the valve arrangement in which direction of rotation the gear pump 11 is driven.
  • Fig. 1 a is illustrated by arrows, which path takes the flow medium when in the lower strand of the loop 12, the suction side and in the upper strand of the ring line 12, the pressure side of the external gear pump 11 is effective.
  • This pumping direction arises because the right A-marked gear 17 is driven in rotation by means of an electric motor, not shown, in the counterclockwise direction, while the meshing in the toothing left gear 17 is driven along by the toothing engagement in a clockwise direction.
  • the lighter arrows mark the flow path on the suction side to the pump 11 and the dark arrows the flow path of the fluid from the pressure side of the pump 11 away to the discharge line 14.
  • the left check valve 16 By the suction of the pump 11 is the left check valve 16 is opened in the lower strand of the fluid control circuit 10 against the spring load, whereby the fluid from the inflow line 13 to the suction side of the pump 11 can flow.
  • the sealing element of the non-return valve 16 arranged next to the connection line 15 is only pressed more firmly onto its sealing seat by the suction of the pump 11.
  • the fluid can flow only to the suction side of the gear pump 11.
  • On the pressure side of the pump 11, a backflow of the fluid is prevented by the non-return valve 16 arranged between the inflow line 13 and the connecting line 15 in the blocking position.
  • the non-return valve 16 arranged on the pressure side between the connecting line 15 and the outflow line 14 is easily pushed open, after which the fluid can only be conveyed in the direction of the outflow line 14.
  • the non-return valve 16 arranged on the pressure side between the connecting line 15 and the outflow line 14 is easily pushed open, after which the fluid can only be conveyed in the direction of the outflow line 14.
  • the non-return valve 16 arranged on the pressure side between the connecting line 15 and the outflow line 14 is easily pushed open, after which the fluid can only be conveyed in the direction of the outflow line 14.
  • the non-return valve 16 arranged on the pressure side between the connecting line 15 and the outflow line 14 is easily pushed open, after which the fluid can only be conveyed in the direction of the outflow line 14.
  • Spielbehaftung of the toothing intervention quite ü predominantly the rotational force transmitting tooth flanks of the gears 17, so only one tooth flank of each tooth.
  • the fluid of the hydraulic system is therefore always conveyed independently of the conveying direction of the gear pump 11 from the inflow line 13 to the discharge line 14 or pressurized in this direction. That has that Advantage that it is possible without structural changes in the hydraulic system itself to drive the gear pump 11 alternately in both directions of rotation and thus to work towards a homogenization of Zahnflankenverschl devises. Especially with gear pumps of vehicle brake systems, this is very valuable because they are exposed to very high wear conditions. Compared to stationary systems z. B. an ABS gear pump of a vehicle brake system with large temperature differences, widely varying back pressures, form, speeds, viscosities and partial vacuum work.
  • FIGS. 2a and 2b show the fluid control circuit 10 already described with an internal gear pump 21 which is customary in ABS gear pumps. With regard to the function of the control circuit 10 with the check valves 16, there are no significant differences, since only the technical data of the pump change.
  • the internal gear pump 21 comprises in a conventional manner a ring gear 22 with internal teeth, in which a pinion 23 meshes with external teeth, wherein the pinion 23 is rotated by the drive motor.
  • the suction side of the internal gear pump 21 is in the lower strand of the control circuit 10 and the pressure side in the upper strand, so that the control of the fluid in the control circuit 10 of Fig. 1a corresponds.
  • the suction side of the internal gear pump 21 is now in the upper strand of the control circuit 10 and the pressure side in the lower strand of the control circuit 10, so that the control of the fluid corresponds to that of Fig. Ib.
  • a peculiarity of the internal gear pump 21 can still be seen in that it has a filler 24 in the space between the teeth, which has the shape of a cut off at both ends sickle, wherein the end-side cutting surfaces extend radially to the pinion 23. Since the filler 24 is designed mirror-symmetrically relative to its central transverse axis, there is thus advantageously no change in the pump characteristic when the conveying direction of the internal gear pump 21 is changed.

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)
  • Regulating Braking Force (AREA)

Abstract

La présente invention concerne un système hydraulique comprenant une pompe à roues dentées (11, 21) dont on peut faire s'inverser le sens de rotation, l'une des roues dentées (17, 23) de la pompe étant reliée du point de vue entraînement à un moteur d'entraînement, et couplée en rotation à l'autre roue dentée (17, 22) par encliquetage des dentures des roues dentées. Selon l'invention, l'inversion de sens de rotation de la pompe à roues dentées (11, 21) est utilisée pour augmenter la longévité de la pompe. Selon l'invention, un circuit de régulation de fluide assure, au moyen d'un dispositif de soupape (16), l'acheminement du liquide hydraulique toujours dans le même sens.
PCT/EP2008/052899 2007-05-11 2008-03-12 Système hydraulique comprenant une pompe à roues dentées réversible WO2008138655A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710022216 DE102007022216A1 (de) 2007-05-11 2007-05-11 Hydrauliksystem mit Zahnradpumpe
DE102007022216.7 2007-05-11

Publications (1)

Publication Number Publication Date
WO2008138655A1 true WO2008138655A1 (fr) 2008-11-20

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ID=39430747

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/052899 WO2008138655A1 (fr) 2007-05-11 2008-03-12 Système hydraulique comprenant une pompe à roues dentées réversible

Country Status (2)

Country Link
DE (1) DE102007022216A1 (fr)
WO (1) WO2008138655A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103702873A (zh) * 2011-07-26 2014-04-02 罗伯特·博世有限公司 用于车辆的制动系统以及用于运行车辆的制动系统的方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011079860A1 (de) * 2011-07-26 2013-01-31 Robert Bosch Gmbh Bremssystem für ein Fahrzeug und Verfahren zum Betreiben eines Bremssystems eines Fahrzeugs
DE102011055194B4 (de) * 2011-11-10 2018-01-18 Gkn Walterscheid Gmbh Hydraulikpumpenanordnung
DE102014111133A1 (de) * 2014-08-05 2016-02-11 Robert Bosch Automotive Steering Gmbh Filterung für reversierbare Zahnradmaschine
DE102014016173A1 (de) * 2014-11-03 2016-05-04 Audi Ag Antriebseinrichtung für ein Kraftfahrzeug
EP3374640B1 (fr) * 2015-11-12 2024-03-06 Pierburg Pump Technology GmbH Pompe à vide électrique
WO2022058442A1 (fr) 2020-09-18 2022-03-24 Vcst Industrial Products Bv Pompe volumétrique bidirectionnelle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928243A (en) * 1958-03-12 1960-03-15 Roper Hydraulics Inc Pump control system
US3091306A (en) * 1959-08-06 1963-05-28 Auto Research Corp Lubrication pump
GB927325A (en) * 1961-04-06 1963-05-29 W A Whitney Mfg Company Improvements in hydraulic pumps
US3343494A (en) * 1966-09-12 1967-09-26 Sundstrand Corp Automatically reversible gear pump
US4392799A (en) * 1979-12-17 1983-07-12 Kabushiki Kaisha Fujikoshi Internal gear pump motor
DE19643343A1 (de) * 1996-10-21 1998-04-23 Bosch Gmbh Robert Schlupfgeregelte hydraulische Fahrzeug-Bremsanlage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10065234A1 (de) 2000-01-28 2002-02-21 Continental Teves Ag & Co Ohg Elektrohydraulische Fahrzeugbremsanlage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928243A (en) * 1958-03-12 1960-03-15 Roper Hydraulics Inc Pump control system
US3091306A (en) * 1959-08-06 1963-05-28 Auto Research Corp Lubrication pump
GB927325A (en) * 1961-04-06 1963-05-29 W A Whitney Mfg Company Improvements in hydraulic pumps
US3343494A (en) * 1966-09-12 1967-09-26 Sundstrand Corp Automatically reversible gear pump
US4392799A (en) * 1979-12-17 1983-07-12 Kabushiki Kaisha Fujikoshi Internal gear pump motor
DE19643343A1 (de) * 1996-10-21 1998-04-23 Bosch Gmbh Robert Schlupfgeregelte hydraulische Fahrzeug-Bremsanlage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103702873A (zh) * 2011-07-26 2014-04-02 罗伯特·博世有限公司 用于车辆的制动系统以及用于运行车辆的制动系统的方法

Also Published As

Publication number Publication date
DE102007022216A1 (de) 2008-11-13

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