EP0457207A1 - Dispositif de commande hydraulique - Google Patents

Dispositif de commande hydraulique Download PDF

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Publication number
EP0457207A1
EP0457207A1 EP91107590A EP91107590A EP0457207A1 EP 0457207 A1 EP0457207 A1 EP 0457207A1 EP 91107590 A EP91107590 A EP 91107590A EP 91107590 A EP91107590 A EP 91107590A EP 0457207 A1 EP0457207 A1 EP 0457207A1
Authority
EP
European Patent Office
Prior art keywords
piston
pressure
pump
load pressure
space
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.)
Withdrawn
Application number
EP91107590A
Other languages
German (de)
English (en)
Inventor
Ortwin Dr. Eich
Franz-Peter Salz
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.)
Oerlikon Barmag AG
Original Assignee
Barmag AG
Barmag Barmer Maschinenfabrik AG
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 Barmag AG, Barmag Barmer Maschinenfabrik AG filed Critical Barmag AG
Publication of EP0457207A1 publication Critical patent/EP0457207A1/fr
Withdrawn legal-status Critical Current

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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
    • F15B11/02—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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
    • F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves

Definitions

  • the solution according to claim 2 has the advantage that the controllability is independent of the level of the respective load pressure.
  • a hydraulic piston 13 is in a cylinder space 16 movable.
  • the piston 13 acts on the back of the balance piston 2 by means of a piston rod 10 which penetrates the load pressure chamber 8.
  • the piston rod 10 can be an independent component.
  • the piston rod 10 is fixedly attached to the piston 13 while it lies loosely on the rear of the balance piston 2.
  • the piston rod 10 is sealingly guided in the wall between the load pressure chamber 8 and the cylinder chamber 16.
  • the cylinder space 16 is relieved of pressure on the side 22 facing the load pressure space 8. For this purpose, this side 22 is connected via the relief channel 17 to the tank outlet 7 of the differential pressure balance.
  • a three-way pressure compensator was described here. However, the invention is also applicable to a two-way pressure compensator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
EP91107590A 1990-05-16 1991-05-10 Dispositif de commande hydraulique Withdrawn EP0457207A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4015688 1990-05-16
DE4015688 1990-05-16

Publications (1)

Publication Number Publication Date
EP0457207A1 true EP0457207A1 (fr) 1991-11-21

Family

ID=6406515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107590A Withdrawn EP0457207A1 (fr) 1990-05-16 1991-05-10 Dispositif de commande hydraulique

Country Status (1)

Country Link
EP (1) EP0457207A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986004963A1 (fr) * 1985-02-23 1986-08-28 Barmag Barmer Maschinenfabrik Aktiengesellschaft Soupape proportionnelle avec precharge variable du ressort d'equilibrage non proportionnelle a la pression de la charge

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986004963A1 (fr) * 1985-02-23 1986-08-28 Barmag Barmer Maschinenfabrik Aktiengesellschaft Soupape proportionnelle avec precharge variable du ressort d'equilibrage non proportionnelle a la pression de la charge

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Legal Events

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

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17P Request for examination filed

Effective date: 19910924

AK Designated contracting states

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Designated state(s): DE FR GB IT NL

17Q First examination report despatched

Effective date: 19930518

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18W Application withdrawn

Withdrawal date: 19930702