EP2541071A3 - Valve assembly for a hydraulic control system - Google Patents

Valve assembly for a hydraulic control system Download PDF

Info

Publication number
EP2541071A3
EP2541071A3 EP12004137.1A EP12004137A EP2541071A3 EP 2541071 A3 EP2541071 A3 EP 2541071A3 EP 12004137 A EP12004137 A EP 12004137A EP 2541071 A3 EP2541071 A3 EP 2541071A3
Authority
EP
European Patent Office
Prior art keywords
connection
control system
hydraulic control
valve assembly
pressure
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
EP12004137.1A
Other languages
German (de)
French (fr)
Other versions
EP2541071B1 (en
EP2541071A2 (en
Inventor
Michael Dipl.-Ing. Deeken
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.)
Liebherr Machines Bulle SA
Original Assignee
Liebherr Machines Bulle SA
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 claimed from CH01393/11A external-priority patent/CH705150A1/en
Application filed by Liebherr Machines Bulle SA filed Critical Liebherr Machines Bulle SA
Publication of EP2541071A2 publication Critical patent/EP2541071A2/en
Publication of EP2541071A3 publication Critical patent/EP2541071A3/en
Application granted granted Critical
Publication of EP2541071B1 publication Critical patent/EP2541071B1/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
    • F15B11/006—Hydraulic "Wheatstone bridge" circuits, i.e. with four nodes, P-A-T-B, and on-off or proportional valves in each link
    • 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
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20592—Combinations of pumps for supplying high and low 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
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/30575—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve in a Wheatstone Bridge arrangement (also half bridges)
    • 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
    • F15B2211/41563—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a return line
    • 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
    • F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the return line
    • 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
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members

Abstract

Die vorliegende Anmeldung zeigt eine Ventilanordnung für ein hydraulisches Steuerungssystem zum Ansteuern eines hydraulischen Verbrauchers (11), mit einem Druckanschluss (P) zur Verbindung mit einer Druckversorgung, einem Tankanschluss (T) zur Verbindung mit einer Rücklaufleitung, und zwei Verbraucheranschlüssen (A, B) zur Verbindung mit den Anschlüssen des hydraulischen Verbrauchers, wobei zur Ansteuerung der Verbindung der beiden Verbraucheranschlüsse mit Druckanschluss und Tankanschluss mindestens zwei separate Ventile (1, 2, 3, 4) eingesetzt werden. Dabei umfasst die Ventilanordnung ein Ventil (5) zur Verbindung von Druckanschluss und Tankanschluss.

Figure imgaf001
The present application shows a valve arrangement for a hydraulic control system for actuating a hydraulic consumer (11), having a pressure connection (P) for connection to a pressure supply, a tank connection (T) for connection to a return line, and two consumer connections (A, B) for connection to the terminals of the hydraulic consumer, wherein at least two separate valves (1, 2, 3, 4) are used to control the connection of the two consumer connections with pressure connection and tank connection. In this case, the valve arrangement comprises a valve (5) for connecting the pressure connection and the tank connection.
Figure imgaf001
EP12004137.1A 2011-06-30 2012-05-29 Valve assembly for a hydraulic control system Active EP2541071B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011106081 2011-06-30
CH01393/11A CH705150A1 (en) 2011-06-30 2011-08-25 Valve arrangement for hydraulic control system for controlling e.g. hydraulic cylinder for lifting extension arm of crane, has valve i.e. separate valve, connecting pressure connection and tank connection

Publications (3)

Publication Number Publication Date
EP2541071A2 EP2541071A2 (en) 2013-01-02
EP2541071A3 true EP2541071A3 (en) 2016-12-07
EP2541071B1 EP2541071B1 (en) 2020-11-11

Family

ID=46245447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12004137.1A Active EP2541071B1 (en) 2011-06-30 2012-05-29 Valve assembly for a hydraulic control system

Country Status (1)

Country Link
EP (1) EP2541071B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105987036B (en) * 2015-02-05 2018-01-09 徐工集团工程机械股份有限公司 Supporting leg control combination valve, hydraulic system and crane
WO2023080930A1 (en) * 2021-11-08 2023-05-11 Pdc Machines Inc. High-throughput diaphragm compressor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411536A (en) * 1966-07-06 1968-11-19 Koehring Co Pilot operated control valve mechanism
EP0211497B1 (en) * 1985-06-24 1990-06-06 Fluidcircuit Technologies, Inc. Improved fluid power control system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19500749C2 (en) * 1995-01-12 2000-12-07 Danfoss As Three-way or multi-way valve
US6467264B1 (en) * 2001-05-02 2002-10-22 Husco International, Inc. Hydraulic circuit with a return line metering valve and method of operation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411536A (en) * 1966-07-06 1968-11-19 Koehring Co Pilot operated control valve mechanism
EP0211497B1 (en) * 1985-06-24 1990-06-06 Fluidcircuit Technologies, Inc. Improved fluid power control system

Also Published As

Publication number Publication date
EP2541071B1 (en) 2020-11-11
EP2541071A2 (en) 2013-01-02

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