EP0528103A1 - Dispositif de commande électro-hydraulique - Google Patents

Dispositif de commande électro-hydraulique Download PDF

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Publication number
EP0528103A1
EP0528103A1 EP92104566A EP92104566A EP0528103A1 EP 0528103 A1 EP0528103 A1 EP 0528103A1 EP 92104566 A EP92104566 A EP 92104566A EP 92104566 A EP92104566 A EP 92104566A EP 0528103 A1 EP0528103 A1 EP 0528103A1
Authority
EP
European Patent Office
Prior art keywords
piston
main piston
pilot valve
electro
displacement
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
EP92104566A
Other languages
German (de)
English (en)
Other versions
EP0528103B1 (fr
EP0528103B2 (fr
Inventor
Detlef Tolksdorf
Gerd Pidde
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.)
Gft Gesellschaft fur Hydraulik-Technologie GbR
Original Assignee
Pidde Gerd
Tolksdorf Detlef
O&K Orenstein and Koppel 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6436652&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0528103(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Pidde Gerd, Tolksdorf Detlef, O&K Orenstein and Koppel GmbH filed Critical Pidde Gerd
Publication of EP0528103A1 publication Critical patent/EP0528103A1/fr
Publication of EP0528103B1 publication Critical patent/EP0528103B1/fr
Application granted granted Critical
Publication of EP0528103B2 publication Critical patent/EP0528103B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
    • F15B13/0435—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves the pilot valves being sliding 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
    • 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
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool 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
    • 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
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot 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
    • 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
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
    • F15B13/0433—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves the pilot valves being pressure control 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/16—Special measures for feedback, e.g. by a follow-up device

Definitions

  • the invention relates to an electro-hydraulic control unit, in particular for controlling construction machines, with a displaceable main piston, on the two end faces of which a control chamber is provided, which can be acted upon or relieved of pressure medium by means of electro-magnetically actuatable control means.
  • a generic electro-hydraulic actuating unit which has a displaceable piston-like part, in particular a control slide, on the two end faces of which a control chamber is arranged, which can be acted upon by control means for moving the part with pressure medium or is relieved.
  • the control means is an electro-magnetically actuable control valve which is assigned to each control chamber and acts on the control valve via a mechanical return.
  • the mechanical return is designed as a spring, which is supported on the mutually facing end faces of the displaceable part and the control valve. Further centering springs are provided for the piston-like part.
  • This setting unit is intended to provide feedback for the position control of the displaceable part, the setting being intended to be particularly precise.
  • the control valves are designed as 3/2-way valves.
  • a disadvantage of this control unit is that due to the interaction of magnetic force and spring force at the valve, a pressure is set (according to the flow divider principle), which acts as an adjusting force over the surface of the displaceable part. It follows that with constant proportional magnetic force, the control pressure is only set as a function of the spool position, ie there is only exactly one setting value for a spool position. However, since the disturbances which occur which adjust the piston slide occur in a wide range, the control pressure must also be adjustable in a wide range with constant magnetic force in order to be able to position the piston in a position-controlled manner. In addition, this control unit has a poor efficiency, since the control oil volume flow requirement is high due to the flow divider function for generating control pressure. Furthermore, a high control pressure requirement is required, since the main piston is moved against a spring.
  • the object of the invention is the further development of the electro-hydraulic control unit described in the generic part of the first claim to the effect that a closed position control loop is formed which also with occurring disturbance variables such as flow forces, pressure changes and the like. With high setting accuracy or reproducibility of position and speed the components to be controlled can be maintained.
  • a single control means which can be actuated by means of two electromagnets in the form of a pilot valve, which is arranged essentially in series with the main piston, and at least one displacement-force converter, which is in operative connection with the main piston and the piston of the pilot valve stands.
  • a method for actuating the electro-hydraulic actuating unit is characterized in that control oil flows into the associated control chamber by actuating one of the electro-magnets via the pilot valve and the main piston is moved in the corresponding direction, the main piston being adjusted until the spring force of the displacement-force converter and the magnetic force are in equilibrium and the piston of the pilot valve is closed via the displacement-force converter by the main piston.
  • the field of application of the subject matter of the invention essentially relates to the control of hydraulic cylinders and hydraulic motors in the stationary industrial sector, a preferred field of application being formed by the mobile construction machinery sector.
  • FIG. 2 shows a schematic diagram of the electro-hydraulic actuating unit according to the invention, which essentially contains the following components: a main piston 2, which can be moved in the longitudinal direction within a housing 1, a pilot valve 3 together with piston 4, electro-magnets 5, 6 and a spiral spring 7 (can also be a different type of spring) as a displacement-force converter.
  • the pilot valve 3 is a directionally proportional 4/3 valve. Through the electronic control of the magnet 6, for example, the valve 3 opens the connection P to A and B to T.
  • the piston 4 moves in the direction of the main piston 2 and the control oil flows into the control chamber 8 and moves the main piston 2 in the direction of the piston 4.
  • the main piston 2 is connected to the piston 4 of the pilot valve 3 via the spiral spring 7, which is designed as a compression spring, in such a way that it is fastened to the mutually facing end faces 9, 10 of the two pistons 2, 4.
  • the main piston 2 is adjusted until the compression spring 7 has adjusted due to its characteristic curve so that the spring force of the compression spring 7 and the magnetic force of the magnet 6 are in equilibrium. This means that the main piston 2 closes the piston 4 of the pilot valve 3 via the compression spring 7. Any positive or negative positional deviation of the main piston 2 causes an imbalance of forces between the compression spring 7 and the electronic magnetic force, so that the piston 4 moves into the control position until the main piston 2 is positioned again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Servomotors (AREA)
  • Fluid-Pressure Circuits (AREA)
EP92104566A 1991-07-20 1992-03-17 Dispositif de commande électro-hydraulique Expired - Lifetime EP0528103B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4124140A DE4124140C2 (de) 1991-07-20 1991-07-20 Einrichtung zur lagegerechten Positionierung des Hauptkolbens einer elektro-hydraulischen Stelleinheit
DE4124140 1991-07-20

Publications (3)

Publication Number Publication Date
EP0528103A1 true EP0528103A1 (fr) 1993-02-24
EP0528103B1 EP0528103B1 (fr) 1995-10-11
EP0528103B2 EP0528103B2 (fr) 2000-06-28

Family

ID=6436652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92104566A Expired - Lifetime EP0528103B2 (fr) 1991-07-20 1992-03-17 Dispositif de commande électro-hydraulique

Country Status (2)

Country Link
EP (1) EP0528103B2 (fr)
DE (2) DE4124140C2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4302130C2 (de) * 1993-01-27 1995-04-13 Orenstein & Koppel Ag Elektro-hydraulische Stelleinheit
US5921279A (en) * 1998-04-29 1999-07-13 Husco International, Inc. Solenoid operated dual spool control valve
DE19823529A1 (de) * 1998-05-26 1999-12-09 Mannesmann Rexroth Ag Wegbestimmungssystem

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2835771A1 (de) * 1978-08-16 1980-02-28 Schwelm & Towler Hydraulics Anordnung zur aussteuerung eines cartridgeelementes
FR2508565A1 (fr) * 1981-06-27 1982-12-31 Bosch Gmbh Robert Positionneur electrohydraulique, destine en particulier a la telecommande d'un distributeur
DE3527026A1 (de) * 1985-07-27 1987-01-29 Bosch Gmbh Robert Elektrohydraulische stelleinheit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2213439C3 (de) † 1972-03-20 1978-12-07 Robert Bosch Gmbh, 7000 Stuttgart Elektrohydraulische Stelleinrichtung
US4201116A (en) † 1977-07-11 1980-05-06 The Cessna Aircraft Company Electro-hydraulic proportional control servo valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2835771A1 (de) * 1978-08-16 1980-02-28 Schwelm & Towler Hydraulics Anordnung zur aussteuerung eines cartridgeelementes
FR2508565A1 (fr) * 1981-06-27 1982-12-31 Bosch Gmbh Robert Positionneur electrohydraulique, destine en particulier a la telecommande d'un distributeur
DE3527026A1 (de) * 1985-07-27 1987-01-29 Bosch Gmbh Robert Elektrohydraulische stelleinheit

Also Published As

Publication number Publication date
DE59203972D1 (de) 1995-11-16
DE4124140C2 (de) 1995-04-13
EP0528103B1 (fr) 1995-10-11
EP0528103B2 (fr) 2000-06-28
DE4124140A1 (de) 1993-01-21

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