EP0869285A3 - Load sensing control with flushing circuit - Google Patents

Load sensing control with flushing circuit Download PDF

Info

Publication number
EP0869285A3
EP0869285A3 EP98103929A EP98103929A EP0869285A3 EP 0869285 A3 EP0869285 A3 EP 0869285A3 EP 98103929 A EP98103929 A EP 98103929A EP 98103929 A EP98103929 A EP 98103929A EP 0869285 A3 EP0869285 A3 EP 0869285A3
Authority
EP
European Patent Office
Prior art keywords
pressure
load
line
delivery
hydraulic pump
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
EP98103929A
Other languages
German (de)
French (fr)
Other versions
EP0869285A2 (en
EP0869285B1 (en
Inventor
Reinhold Schniederjan
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.)
Brueninghaus Hydromatik GmbH
Original Assignee
Brueninghaus Hydromatik 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
Priority to DE19713934 priority Critical
Priority to DE1997113934 priority patent/DE19713934B4/en
Application filed by Brueninghaus Hydromatik GmbH filed Critical Brueninghaus Hydromatik GmbH
Publication of EP0869285A2 publication Critical patent/EP0869285A2/en
Publication of EP0869285A3 publication Critical patent/EP0869285A3/en
Application granted granted Critical
Publication of EP0869285B1 publication Critical patent/EP0869285B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18Lubricating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00Control, 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
    • F04B49/08Regulating by delivery pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08Cooling; Heating; Preventing freezing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00Fluid parameters
    • F04B2205/06Pressure in a (hydraulic) circuit
    • F04B2205/061Pressure in a (hydraulic) circuit after a throttle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00Fluid parameters
    • F04B2205/06Pressure in a (hydraulic) circuit
    • F04B2205/062Pressure in a (hydraulic) circuit before a throttle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00Fluid parameters
    • F04B2205/09Flow through the pump
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00Fluid parameters
    • F04B2205/15By-passing over the pump

Abstract

The invention relates to a load pressure-controlled flow controller (1) for one under Delivery pressure in a working line (5) promoting hydraulic pump (2). The flow controller (1) has a measuring throttle (6) arranged in the working line (5), one downstream the measuring throttle (6) connected to the working line (5) load pressure signaling line (7) for detecting a load pressure of one connected to the working line (5) Consumer and for transmitting a load reporting pressure dependent on the load pressure and an upstream of the measuring throttle (6) connected to the working line (5) Delivery pressure signaling line (8) for detecting the delivery pressure of the hydraulic pump (2) and for transferring a delivery pressure dependent on the delivery pressure. Further is one with the load pressure signaling line (7) and with the delivery pressure signaling line (8) connected control valve (6) regulating the delivery volume of the hydraulic pump (2) provided that the delivery volume of the hydraulic pump (2) with increasing difference between feed pressure and load signal pressure reduced and with decreasing Difference increased.
According to the development according to the invention, a flushing circuit (30, 38, 40, 39) branching off the working line (5) upstream of the measuring throttle (6) is provided for flushing the interior of the hydraulic pump (2). The flushing circuit has a flushing valve (30) connected to the load pressure signaling line (7) which interrupts the flushing circuit when the load signaling pressure prevailing in the load pressure signaling line (7) exceeds a predetermined first threshold value.
EP19980103929 1997-04-04 1998-03-05 Load sensing control with flushing circuit Expired - Lifetime EP0869285B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19713934 1997-04-04
DE1997113934 DE19713934B4 (en) 1997-04-04 1997-04-04 Load pressure-controlled flow regulator with flushing circuit

Publications (3)

Publication Number Publication Date
EP0869285A2 EP0869285A2 (en) 1998-10-07
EP0869285A3 true EP0869285A3 (en) 1999-09-22
EP0869285B1 EP0869285B1 (en) 2002-09-11

Family

ID=7825449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980103929 Expired - Lifetime EP0869285B1 (en) 1997-04-04 1998-03-05 Load sensing control with flushing circuit

Country Status (2)

Country Link
EP (1) EP0869285B1 (en)
DE (1) DE19713934B4 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19930618A1 (en) * 1999-07-02 2001-01-04 Mannesmann Rexroth Ag Hydraulic control arrangement for supplying pressure medium to preferably several hydraulic consumers
DE10351930A1 (en) * 2003-11-07 2005-06-09 Linde Ag Hydrostatic machine
DE102005051482A1 (en) * 2005-10-27 2007-05-03 Brueninghaus Hydromatik Gmbh Load-pressure-controlled flow regulator with vibration damping
DE102009012560B4 (en) 2009-03-11 2019-09-12 Robert Bosch Gmbh Valve device for a control device
CN102878153B (en) * 2012-11-06 2015-03-18 南京贝奇尔机械有限公司 Pump-controlled switching device of multi-way valve testing platform, and switching controlling method of pump-controlled switching device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1284310A (en) * 1969-06-25 1972-08-09 Task Corp Improvements relating to fluid pumping systems
US3753627A (en) * 1971-04-09 1973-08-21 E Ward Pump bypass liquid control
US3856436A (en) * 1972-12-18 1974-12-24 Sperry Rand Corp Power transmission
US4072443A (en) * 1975-10-04 1978-02-07 Lucas Industries Limited Control valve arrangements for variable stroke pumps
DE2925236A1 (en) * 1979-06-22 1981-01-15 Danfoss As Variable output pump with spring loaded servo piston - which is pressure actuated and coupled to idling valve with throttling action

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4447154C2 (en) * 1994-12-29 2002-05-29 Brueninghaus Hydromatik Gmbh Load-sensing circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1284310A (en) * 1969-06-25 1972-08-09 Task Corp Improvements relating to fluid pumping systems
US3753627A (en) * 1971-04-09 1973-08-21 E Ward Pump bypass liquid control
US3856436A (en) * 1972-12-18 1974-12-24 Sperry Rand Corp Power transmission
US4072443A (en) * 1975-10-04 1978-02-07 Lucas Industries Limited Control valve arrangements for variable stroke pumps
DE2925236A1 (en) * 1979-06-22 1981-01-15 Danfoss As Variable output pump with spring loaded servo piston - which is pressure actuated and coupled to idling valve with throttling action

Also Published As

Publication number Publication date
DE19713934A1 (en) 1998-10-08
EP0869285A2 (en) 1998-10-07
DE19713934B4 (en) 2004-06-03
EP0869285B1 (en) 2002-09-11

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