EP0719947A3 - Load-sensing Schaltung - Google Patents

Load-sensing Schaltung Download PDF

Info

Publication number
EP0719947A3
EP0719947A3 EP95120626A EP95120626A EP0719947A3 EP 0719947 A3 EP0719947 A3 EP 0719947A3 EP 95120626 A EP95120626 A EP 95120626A EP 95120626 A EP95120626 A EP 95120626A EP 0719947 A3 EP0719947 A3 EP 0719947A3
Authority
EP
European Patent Office
Prior art keywords
hydraulic pump
delivery volume
working position
counterforce
volume
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
EP95120626A
Other languages
English (en)
French (fr)
Other versions
EP0719947B1 (de
EP0719947A2 (de
Inventor
Werner Hörmann
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
Application filed by Brueninghaus Hydromatik GmbH filed Critical Brueninghaus Hydromatik GmbH
Publication of EP0719947A2 publication Critical patent/EP0719947A2/de
Publication of EP0719947A3 publication Critical patent/EP0719947A3/de
Application granted granted Critical
Publication of EP0719947B1 publication Critical patent/EP0719947B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • 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
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
    • 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
    • F04B2205/09—Flow through the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/25—Pressure control functions
    • F15B2211/253—Pressure margin control, e.g. pump pressure in relation to load pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6058—Load sensing circuits with isolator valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/67—Methods for controlling pilot pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Abstract

Die Erfindung betrifft eine Load-Sensing-Schaltung für eine wenigstens einen Verbraucher (2) über mindestens eine Arbeitsleitung (3) antreibende, nullhubgeregelte Hydropumpe (1) verstellbaren Fördervolumens (V), mit einem auf einen Sollwert des Volumenstroms (Q) der Hydropumpe (1) einstellbaren Regelventil (16), dessen Ventilkörper (22) über eine erste Meßfläche (MF1, MF'1) vom Arbeitsdruck (pA) der Hydropumpe (1) gegen eine Gegenkraft (FG) in Richtung einer Arbeitsstellung und über eine zweite Meßfläche (MF2, MF'2) vom Lastdruck (pL) des Verbrauchers (2) gleichsinnig mit der Gegenkraft (FG) in Richtung einer anderen Arbeitsstellung beaufschlagbar ist, wobei das Regelventil (16) in der einen Arbeitsstellung eine Verstellung der Hydropumpe (1) auf kleineres und in der anderen Arbeitsstellung auf größeres Fördervolumen (V) hervorruft. Um mit geringerem konstruktiven Aufwand ein stabileres Betriebsverhalten zu erreichen, ist eine Rückmeldeeinrichtung (17, 36) vorgesehen zur Erzeugung einer dem Volumenstrom (Q) oder dem eingestellten Fördervolumen (V) der Hydropumpe (1) entsprechenden und auf den Ventilkörper (22) wirkenden Rückmeldekraft (FR), die die Beaufschlagung des Ventilkörpers (22) durch die Gegenkraft (FG) und damit die Sollwerteinstellung des Regelventils (16) gegensinnig zu Änderungen des Volumenstroms (Q) bzw. Fördervolumens (V) ändert.
EP95120626A 1994-12-29 1995-12-27 Load-sensing Schaltung Expired - Lifetime EP0719947B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4447154A DE4447154C2 (de) 1994-12-29 1994-12-29 Load-Sensing-Schaltung
DE4447154 1994-12-29

Publications (3)

Publication Number Publication Date
EP0719947A2 EP0719947A2 (de) 1996-07-03
EP0719947A3 true EP0719947A3 (de) 1998-02-11
EP0719947B1 EP0719947B1 (de) 2004-07-21

Family

ID=6537452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95120626A Expired - Lifetime EP0719947B1 (de) 1994-12-29 1995-12-27 Load-sensing Schaltung

Country Status (2)

Country Link
EP (1) EP0719947B1 (de)
DE (2) DE4447154C2 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19713934B4 (de) 1997-04-04 2004-06-03 Brueninghaus Hydromatik Gmbh Lastdruckgeführter Förderstromregler mit Spülkreislauf
DE10134747B4 (de) * 2001-07-17 2017-05-04 Liebherr-Machines Bulle S.A. Verfahren und Vorrichtung zur lastabhängigen Steuerung der Fluidversorgung eines Fluidkreises
DE10209964A1 (de) * 2002-03-06 2003-09-25 Zf Lenksysteme Gmbh System zur Steuerung einer hydraulischen Verstellpumpe
DE102005016181B4 (de) * 2005-04-08 2018-05-09 Robert Bosch Automotive Steering Gmbh Regelvorrichtung für eine hydraulische Fördereinrichtung
DE102006002959A1 (de) * 2006-01-21 2007-07-26 Zf Lenksysteme Gmbh Hydrauliksystem mit volumenstromgeregelter Pumpe
DE102006014074B4 (de) * 2006-03-28 2017-04-06 Robert Bosch Gmbh Dosiersystem und Verfahren zur Abgabe eines Zuschlagstoffes in ein Abgassystem einer Brennkraftmaschine
DE102007039589A1 (de) * 2007-08-22 2009-02-26 Voigt, Dieter, Dipl.-Ing. Regelölpumpe mit verstellwegabhängiger Öldruckregelung
DE102008031768A1 (de) * 2008-07-04 2010-01-07 Alpha Fluid Hydrauliksysteme Müller GmbH Regelanordnung für proportionale Winkelverstellung
DE102012112879B4 (de) * 2012-12-21 2014-08-07 Pierburg Gmbh Ventilvorrichtung für einen Hydraulikkreislauf sowie Ölpumpenregelanordnung
DE102013216395B4 (de) * 2013-08-19 2019-01-17 Danfoss Power Solutions a.s. Steuereinrichtung für hydraulische verstellpumpen und verstellpumpe mit einer steuereinrichtung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2910611A1 (de) * 1979-03-17 1980-09-18 Bosch Gmbh Robert Hydraulikanlage
DE2913534A1 (de) * 1979-04-04 1980-10-16 Bosch Gmbh Robert Einrichtung zur regelung des foerderstroms und zur begrenzung des foerderdrucks einer verstellbaren pumpe
US4292805A (en) * 1979-09-24 1981-10-06 Rexnord Inc. Servo-valve convertible construction
DE3200885A1 (de) * 1982-01-14 1983-07-21 Robert Bosch Gmbh, 7000 Stuttgart Leistungsregler fuer eine hydrostatische pumpe
DE3340332A1 (de) * 1983-11-08 1985-05-23 Hydromatik GmbH, 7915 Elchingen Leistungs-regelvorrichtung fuer einen hydrostatischen antrieb mit foerdermengeneinstellung
DE3805061A1 (de) * 1988-02-18 1989-08-31 Linde Ag Hydraulische schaltanordnung
EP0586214A1 (de) * 1992-08-31 1994-03-09 Kayaba Industry Co., Ltd. Steuereinrichtung für Verbraucher
GB2291986A (en) * 1994-07-29 1996-02-07 Daewoo Heavy Ind Co Ltd Fluid pressure control system for hydraulic excavators

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2910611A1 (de) * 1979-03-17 1980-09-18 Bosch Gmbh Robert Hydraulikanlage
DE2913534A1 (de) * 1979-04-04 1980-10-16 Bosch Gmbh Robert Einrichtung zur regelung des foerderstroms und zur begrenzung des foerderdrucks einer verstellbaren pumpe
US4292805A (en) * 1979-09-24 1981-10-06 Rexnord Inc. Servo-valve convertible construction
DE3200885A1 (de) * 1982-01-14 1983-07-21 Robert Bosch Gmbh, 7000 Stuttgart Leistungsregler fuer eine hydrostatische pumpe
DE3340332A1 (de) * 1983-11-08 1985-05-23 Hydromatik GmbH, 7915 Elchingen Leistungs-regelvorrichtung fuer einen hydrostatischen antrieb mit foerdermengeneinstellung
DE3805061A1 (de) * 1988-02-18 1989-08-31 Linde Ag Hydraulische schaltanordnung
EP0586214A1 (de) * 1992-08-31 1994-03-09 Kayaba Industry Co., Ltd. Steuereinrichtung für Verbraucher
GB2291986A (en) * 1994-07-29 1996-02-07 Daewoo Heavy Ind Co Ltd Fluid pressure control system for hydraulic excavators

Also Published As

Publication number Publication date
DE4447154C2 (de) 2002-05-29
EP0719947B1 (de) 2004-07-21
EP0719947A2 (de) 1996-07-03
DE59510929D1 (de) 2004-08-26
DE4447154A1 (de) 1996-07-11

Similar Documents

Publication Publication Date Title
DE3248622C2 (de) Hochdruckreinigungsgerät
DE19650798B4 (de) Wegeventil mit variabler Rückgewinnung für Baufahrzeuge
DE3118576A1 (de) Regeleinrichtung fuer eine verstellpumpe
CH624231A5 (de)
EP0719947A3 (de) Load-sensing Schaltung
EP0826110A1 (de) Verschiebbare hydraulische leistungs- bzw. momentenregeleinrichtung
DE60221290T2 (de) Eine ventileinheit für modulation von auslassdruck eines gasses
CH635655A5 (en) System for controlling an actuating member with a flow medium
DE2504270A1 (de) Vorrichtung zur versorgung zweier verbraucher mit druckfluessigkeit
DE3712310A1 (de) In einer kraftstoffeinspritzvorrichtung fuer eine brennkraftmaschine verwendetes kraftstoffeinspritzventil
EP1253326A3 (de) Pneumatikventil
CH676024A5 (de)
DE3823892C2 (de) Hydraulikanlage mit zwei Pumpen
DE2035275A1 (de) Steuervorrichtung fur Motorkompressoren
DE1601732B2 (de) Hydraulische vorrichtung
DE4135277C2 (de) Regeleinrichtung für eine verstellbare Hydraulikpumpe
DE10261634B4 (de) Kombinationsverschraubung für eine Vorrichtung zur Regelung des Flusses von Druckflüssigkeit in einer Durchfluss-Kontrolleinrichtung
WO1988006114A1 (en) Hydraulic device with regulable pump
EP0402871A3 (de) Regeleinrichtung für eine verstellbare Pumpe
DE10134747B4 (de) Verfahren und Vorrichtung zur lastabhängigen Steuerung der Fluidversorgung eines Fluidkreises
DE3922829A1 (de) Regelventil fuer eine hydraulisch verstellbare regelpumpe
DE2813791A1 (de) Regelvorrichtung fuer pumpen mit veraenderlichem ausstoss
DE2655966B2 (de) Hydraulisches Fördermengenstellsystem für die Stellpumpe eines hydrostatischen Getriebes
DE2303567C3 (de) Hochdruckreinigungsgerät
DE3150117A1 (de) Durchflussmengenregler fuer fluessige und bzw. oder gasfoermige stoffe

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19980313

17Q First examination report despatched

Effective date: 20010330

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59510929

Country of ref document: DE

Date of ref document: 20040826

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20040909

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20050422

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20071222

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20071213

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20071218

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20071221

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20071217

Year of fee payment: 13

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20081227

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081227