EP2287472A3 - Hydraulic assembly - Google Patents

Hydraulic assembly Download PDF

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Publication number
EP2287472A3
EP2287472A3 EP10172292.4A EP10172292A EP2287472A3 EP 2287472 A3 EP2287472 A3 EP 2287472A3 EP 10172292 A EP10172292 A EP 10172292A EP 2287472 A3 EP2287472 A3 EP 2287472A3
Authority
EP
European Patent Office
Prior art keywords
supply
consumer
priority
level
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
EP10172292.4A
Other languages
German (de)
French (fr)
Other versions
EP2287472A2 (en
EP2287472B1 (en
Inventor
Josef Peters
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of EP2287472A2 publication Critical patent/EP2287472A2/en
Publication of EP2287472A3 publication Critical patent/EP2287472A3/en
Application granted granted Critical
Publication of EP2287472B1 publication Critical patent/EP2287472B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F15B11/162—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for giving priority to particular servomotors or users
    • 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
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
    • F15B11/055—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive by adjusting the pump output or bypass
    • 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
    • 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
    • F15B2211/40—Flow control
    • F15B2211/41—Flow control characterised by the positions of the valve element
    • F15B2211/413—Flow control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a 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
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid 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
    • F15B2211/78—Control of multiple output members
    • F15B2211/781—Control of multiple output members one or more output members having priority

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Eine hydraulische Anordnung (12) umfasst eine Hydraulikpumpe (21) und wenigstens einen ersten, zweiten und dritten von der Hydraulikpumpe (21) über jeweilige Lastdruckleitungen (43, 46, 48, 52, 54) bedarfsgesteuert versorgten Verbraucher (30, 32, 34), wobei jeder Verbraucher (30, 32, 34) durch wenigstens ein Steuerventil (36, 38, 40) über eine eigene Versorgungsleitung (24, 26, 28) hydraulisch parallel mit der Hydraulikpumpe (21) verbunden ist und dem ersten Verbraucher (30) eine Versorgungspriorität erster Stufe, dem zweiten Verbraucher (32) eine der ersten Stufe untergeordnete Versorgungspriorität zweiter Stufe und dem dritten Verbraucher (34) eine der zweiten Stufe untergeordnete Versorgungspriorität dritter Stufe zugeordnet ist. Um eine kostengünstige Prioritätssicherung für die hydraulischen Verbraucher (30, 32, 34) zu schaffen wird vorgeschlagen, dass zur Steuerung der Versorgungsprioritätsstufen die Versorgungsleitungen (26, 28) des zweiten und dritten Verbrauchers (32, 34) über eine Verbindungsleitung (60) verbunden sind und zwischen der Hydraulikpumpe (21) und der Verbindungsleitung (60) in der Versorgungsleitung (28) zum dritten Verbraucher (34) ein lastdruckgesteuertes Prioritätsventil (66) und in der Versorgungsleitung (26) zum zweiten Verbraucher (32) Volumenstrom reduzierende Mittel (58) angeordnet sind, wobei ferner die Verbindungsleitung (60) Mittel (62) aufweist, die einen Volumenstrom von der zweiten Versorgungsleitung (26) in Richtung der dritten Versorgungsleitung (28) sperren.

Figure imgaf001
A hydraulic arrangement (12) comprises a hydraulic pump (21) and at least first, second and third consumers (30, 32, 34) supplied as required by the hydraulic pump (21) via respective load pressure lines (43, 46, 48, 52, 54) in which each consumer (30, 32, 34) is hydraulically connected in parallel to the hydraulic pump (21) by at least one control valve (36, 38, 40) via its own supply line (24, 26, 28) and to the first consumer (30). a first-level supply priority, the second consumer (32) having a second-level second-order supply priority associated with the second consumer, and the third-level third-level supply priority associated with the third consumer (34). In order to provide a cost-effective priority assurance for the hydraulic consumers (30, 32, 34), it is proposed that the supply lines (26, 28) of the second and third consumers (32, 34) are connected via a connecting line (60) to control the supply priority levels and between the hydraulic pump (21) and the connecting line (60) in the supply line (28) to the third load (34) a load pressure controlled priority valve (66) and in the supply line (26) to the second consumer (32) volume flow reducing means (58) Furthermore, the connecting line (60) has means (62) which block a volume flow from the second supply line (26) in the direction of the third supply line (28).
Figure imgaf001
EP10172292.4A 2009-08-21 2010-08-09 Hydraulic assembly Active EP2287472B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009028816A DE102009028816A1 (en) 2009-08-21 2009-08-21 Hydraulic arrangement

Publications (3)

Publication Number Publication Date
EP2287472A2 EP2287472A2 (en) 2011-02-23
EP2287472A3 true EP2287472A3 (en) 2014-09-03
EP2287472B1 EP2287472B1 (en) 2016-02-17

Family

ID=43033415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10172292.4A Active EP2287472B1 (en) 2009-08-21 2010-08-09 Hydraulic assembly

Country Status (6)

Country Link
US (1) US20110146258A1 (en)
EP (1) EP2287472B1 (en)
CN (1) CN101994725A (en)
BR (1) BRPI1002967A2 (en)
DE (1) DE102009028816A1 (en)
ES (1) ES2566638T3 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011089017B4 (en) 2011-12-19 2022-11-17 Zf Friedrichshafen Ag Hydraulic system of an agricultural or municipal utility vehicle, and method for operating a hydraulic system
JP5901378B2 (en) * 2012-03-23 2016-04-06 Ｋｙｂ株式会社 Travel control valve
CN102720710B (en) * 2012-06-26 2015-09-16 中联重科股份有限公司 Hydraulic system, control method of hydraulic system, and engineering machine
CN104214150B (en) * 2014-06-04 2016-03-23 上海中联重科桩工机械有限公司 Double-winch hydraulic control system and engineering machinery with same
US10001147B2 (en) * 2015-05-15 2018-06-19 Caterpillar Inc. Independent metering valve priority in open center hydraulic system
CN106050768A (en) * 2016-06-30 2016-10-26 江苏大学 Electric-hydraulic hitch system of tractor
CN110217737B (en) * 2019-06-20 2020-09-04 江苏建筑职业技术学院 Aerial work platform control valve working condition-division follow-up system and control method
CN110285102B (en) * 2019-07-01 2020-05-15 燕山大学 Multi-shaft emergency rescue vehicle hydraulic steering control system with active suspension
US20240359730A1 (en) * 2023-04-27 2024-10-31 Deere & Company Apparatus for operating a load-controlled hydraulic supply of an agricultural tractor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821416A1 (en) * 1988-06-24 1989-12-28 Rexroth Mannesmann Gmbh HYDRAULIC CONTROL CIRCUIT FOR A TRAILER BRAKE VALVE
DE202004010530U1 (en) * 2004-07-06 2004-12-09 Deere & Company, Moline Hydraulic circuit with priority valve for vehicle has at least one further priority valve with which priority of only one load is regulated and that also has pressure adaptation function

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
US2892311A (en) * 1958-01-08 1959-06-30 Deere & Co Hydraulic apparatus
US3520231A (en) * 1968-10-23 1970-07-14 Gen Signal Corp Hydraulic supply systems with flow rate-limiting control
BE755815A (en) * 1969-09-08 1971-02-15 Clark Equipment Co HYDRAULIC SYSTEM OF A LIFT TRUCK
US4023646A (en) * 1975-11-24 1977-05-17 Allis-Chalmers Corporation Load sensitive hydraulic system
US4070857A (en) * 1976-12-22 1978-01-31 Towmotor Corporation Hydraulic priority circuit
US4923362A (en) * 1988-06-06 1990-05-08 Deere & Company Bucket leveling system with dual fluid supply
DE59104897D1 (en) * 1990-12-15 1995-04-13 Barmag Barmer Maschf HYDRAULIC SYSTEM.
DK167322B1 (en) * 1991-10-28 1993-10-11 Danfoss As HYDRAULIC CIRCUIT
US5950429A (en) * 1997-12-17 1999-09-14 Husco International, Inc. Hydraulic control valve system with load sensing priority
DE19904616A1 (en) * 1999-02-05 2000-08-10 Mannesmann Rexroth Ag Control arrangement for at least two hydraulic consumers and pressure differential valve therefor
DE10308289B4 (en) * 2003-02-26 2010-11-25 Bosch Rexroth Aktiengesellschaft LS-way valve block
DE102004005606B3 (en) * 2004-02-05 2005-10-06 Hydac Fluidtechnik Gmbh circuitry
SE527434C8 (en) * 2004-07-28 2006-03-28 Volvo Constr Equip Holding Se Hydraulic system and work machine including such a system
DE202004014030U1 (en) * 2004-09-08 2006-01-12 Hawe Hydraulik Gmbh & Co. Kg Electrohydraulic control device
DE102004048684A1 (en) * 2004-10-06 2006-04-13 Bosch Rexroth Ag Hydraulic control arrangement
JP5042471B2 (en) * 2005-06-30 2012-10-03 コベルコ建機株式会社 Hydraulic control equipment for construction machinery
GB2435501A (en) * 2006-02-28 2007-08-29 Agco Gmbh Hydraulic system with priority assigned to different consumers
GB0603991D0 (en) * 2006-02-28 2006-04-05 Agco Gmbh Hydraulic systems for utility vehicles, in particular agricultural vehicles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821416A1 (en) * 1988-06-24 1989-12-28 Rexroth Mannesmann Gmbh HYDRAULIC CONTROL CIRCUIT FOR A TRAILER BRAKE VALVE
DE202004010530U1 (en) * 2004-07-06 2004-12-09 Deere & Company, Moline Hydraulic circuit with priority valve for vehicle has at least one further priority valve with which priority of only one load is regulated and that also has pressure adaptation function

Also Published As

Publication number Publication date
EP2287472A2 (en) 2011-02-23
CN101994725A (en) 2011-03-30
ES2566638T3 (en) 2016-04-14
BRPI1002967A2 (en) 2012-04-17
US20110146258A1 (en) 2011-06-23
DE102009028816A1 (en) 2011-02-24
EP2287472B1 (en) 2016-02-17

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