EP0884476A3 - Pressure limiting control circuit for the safe operation of a variable displacement radial or axial hydraulic piston pump or vane cell machine - Google Patents

Pressure limiting control circuit for the safe operation of a variable displacement radial or axial hydraulic piston pump or vane cell machine Download PDF

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Publication number
EP0884476A3
EP0884476A3 EP98105057A EP98105057A EP0884476A3 EP 0884476 A3 EP0884476 A3 EP 0884476A3 EP 98105057 A EP98105057 A EP 98105057A EP 98105057 A EP98105057 A EP 98105057A EP 0884476 A3 EP0884476 A3 EP 0884476A3
Authority
EP
European Patent Office
Prior art keywords
control circuit
variable displacement
piston pump
safe operation
hydraulic piston
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
Application number
EP98105057A
Other languages
German (de)
French (fr)
Other versions
EP0884476A2 (en
EP0884476B1 (en
Inventor
Volkmar Leutner
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 EP0884476A2 publication Critical patent/EP0884476A2/en
Publication of EP0884476A3 publication Critical patent/EP0884476A3/en
Application granted granted Critical
Publication of EP0884476B1 publication Critical patent/EP0884476B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/06—Pressure in a (hydraulic) circuit
    • F04B2205/061—Pressure in a (hydraulic) circuit after a throttle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

Es wird eine verstellbare hydraulische Arbeitsmaschine (11) vorgeschlagen, die eine elektronisch zuschaltbare, hydraulische Sicherheitseinrichtung (60) aufweist. Die Sicherheitseinrichtung (60) verstellt die Arbeitsmaschine (11) bei einem Fehlverhalten der Verstelleinrichtung (14.1/2) auf konstanten Betriebsdruck und verhindert dadurch ein Leersaugen des Hydrauliksystems mit anschließender Selbstzerstörung der Arbeitsmaschine (11) in Folge von Schmierstoffmangel, sowie eine unbeabsichtigte Anstellung der Arbeitsmaschine (11) auf volle Fördermenge bei hohem Druck. Die Sicherheitseinrichtung (60) ist kosten- und bauraumgünstig in das Regelventil (26) der Verstelleinrichtung (14.1/2) integrierbar.

Figure 00000001
An adjustable hydraulic work machine (11) is proposed, which has an electronically switchable, hydraulic safety device (60). The safety device (60) adjusts the working machine (11) to constant operating pressure in the event of a malfunction of the adjusting device (14.1 / 2) and thereby prevents the hydraulic system from being sucked empty with subsequent self-destruction of the working machine (11) as a result of a lack of lubricant, and an unintentional starting of the working machine (11) to full delivery at high pressure. The safety device (60) can be integrated into the control valve (26) of the adjusting device (14.1 / 2) in a cost-effective and space-saving manner.
Figure 00000001
EP98105057A 1997-06-12 1998-03-20 Pressure limiting control circuit for the safe operation of a variable displacement radial or axial hydraulic piston pump or vane cell machine Expired - Lifetime EP0884476B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19724870 1997-06-12
DE19724870A DE19724870A1 (en) 1997-06-12 1997-06-12 Adjustable hydraulic work machine

Publications (3)

Publication Number Publication Date
EP0884476A2 EP0884476A2 (en) 1998-12-16
EP0884476A3 true EP0884476A3 (en) 1999-02-03
EP0884476B1 EP0884476B1 (en) 2003-10-22

Family

ID=7832281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105057A Expired - Lifetime EP0884476B1 (en) 1997-06-12 1998-03-20 Pressure limiting control circuit for the safe operation of a variable displacement radial or axial hydraulic piston pump or vane cell machine

Country Status (3)

Country Link
EP (1) EP0884476B1 (en)
JP (1) JPH1150968A (en)
DE (2) DE19724870A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100485196C (en) * 2006-02-11 2009-05-06 中国矿业大学 Electrohydraulic unloading valve with both hydraulic control mode and electrohydraulic control mode
WO2013037582A1 (en) 2011-09-16 2013-03-21 Robert Bosch Gmbh Adjustment device for a hydrostatic machine and hydrostatic machine
FR2993940B1 (en) * 2012-07-24 2018-11-09 Poclain Hydraulics Industrie HYDRAULIC CONTROL CIRCUIT WITH SAFETY IN CASE OF COMMAND BREAK
DE102016014361A1 (en) 2016-12-02 2018-06-07 Alpha Fluid Hydrauliksysteme Müller GmbH Proportional valve in hydraulic systems
DE102017222355A1 (en) * 2017-12-11 2019-06-13 Robert Bosch Gmbh Control device with electro-proportional control behavior and double solenoid
DE102021118806B3 (en) 2021-07-21 2022-10-13 Pierburg Pump Technology Gmbh Method for controlling an electrically driven fluid pump for a vehicle and an electrically driven fluid pump for a vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3140397A1 (en) * 1981-10-10 1983-04-28 Robert Bosch Gmbh, 7000 Stuttgart Pilot-controlled apparatus for the load-independent regulation of a pressure medium flow in proportion to an electric input signal
DE3629638A1 (en) * 1985-09-02 1987-03-12 Yuken Kogyo Co Ltd PISTON PUMP WITH VARIABLE DISPLACEMENT
DE4115606A1 (en) * 1991-05-14 1992-11-19 Putzmeister Maschf OVERLOAD PROTECTION DEVICE FOR A DRIVE ENGINE DESIGNED AS AN INTERNAL COMBUSTION ENGINE OF A MAIN PUMP OF A HYDRAULIC PRESSURE SUPPLY UNIT
DE4410719A1 (en) * 1994-03-28 1995-10-05 Bosch Gmbh Robert Electrohydraulically adjustable pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4327313C2 (en) * 1993-08-13 2001-07-05 Mannesmann Rexroth Ag Process for regulating the pressure of a hydrostatic machine with an adjustable delivery volume

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3140397A1 (en) * 1981-10-10 1983-04-28 Robert Bosch Gmbh, 7000 Stuttgart Pilot-controlled apparatus for the load-independent regulation of a pressure medium flow in proportion to an electric input signal
DE3629638A1 (en) * 1985-09-02 1987-03-12 Yuken Kogyo Co Ltd PISTON PUMP WITH VARIABLE DISPLACEMENT
DE4115606A1 (en) * 1991-05-14 1992-11-19 Putzmeister Maschf OVERLOAD PROTECTION DEVICE FOR A DRIVE ENGINE DESIGNED AS AN INTERNAL COMBUSTION ENGINE OF A MAIN PUMP OF A HYDRAULIC PRESSURE SUPPLY UNIT
DE4410719A1 (en) * 1994-03-28 1995-10-05 Bosch Gmbh Robert Electrohydraulically adjustable pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BOSCH GMBH: "Neues von Bosch", ÖLHYDRAULIK UND PNEUMATIK, vol. 27, no. 4, April 1983 (1983-04-01), Mainz, Deutschland, pages 275 - 276, XP002087125 *

Also Published As

Publication number Publication date
EP0884476A2 (en) 1998-12-16
DE19724870A1 (en) 1998-12-17
DE59809947D1 (en) 2003-11-27
EP0884476B1 (en) 2003-10-22
JPH1150968A (en) 1999-02-23

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