EP0528103B1 - Dispositif de commande électro-hydraulique - Google Patents
Dispositif de commande électro-hydraulique Download PDFInfo
- Publication number
- EP0528103B1 EP0528103B1 EP92104566A EP92104566A EP0528103B1 EP 0528103 B1 EP0528103 B1 EP 0528103B1 EP 92104566 A EP92104566 A EP 92104566A EP 92104566 A EP92104566 A EP 92104566A EP 0528103 B1 EP0528103 B1 EP 0528103B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- travel
- main piston
- force
- control
- 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.)
- Expired - Lifetime
Links
Images
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, according to the generic part of the first claim.
- 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 pressure means via control means for moving the part or is relieved.
- the control means is an electromagnetically actuated control valve which is assigned to each control chamber and which acts on the control valve via a mechanical return.
- the mechanical return is designed here as a spring, which is supported on the mutually facing end faces of the displaceable part and 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 current 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 adjusted depending on the spool position, i.e. there is only one setting value for a slide 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 because 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. As a result of the constant pressure, high losses in performance due to the circulating oil can be expected.
- DE-C 28 35 771 shows a cartridge valve with a device for actuating it by means of a hydraulic follow-up system, consisting of a cartridge element for regulating a hydraulic volume flow flowing through valve main flow connections, with an inlet throttle between the inflow main flow connection and the control side of the cartridge element and with a pilot piston of a pilot valve interacting via a linkage with an adjustable discharge throttle and with a control valve for actuating the pilot piston.
- the control valve in this case forms an independent control device for connecting the flow of the main flow connection to the top or bottom of the pilot piston with a return line which moves the pilot piston in proportion to a control signal, the control device having a connection via a pipe to the top or bottom of the pilot piston and is connected to the other side of the pilot piston by a further connection via a pipeline.
- a disadvantage of this embodiment is that only two positions can be achieved by this cartridge valve and that the main piston cannot be positioned within the housing independently of disturbance variables.
- the object of the invention is, based on DE-A 35 27 026, the further development of the electrohydraulic actuating unit in such a way that a closed position control loop is formed, which also with high disturbance, such as flow forces, pressure changes and the like. With high setting accuracy or reproducibility of position and speed of the components to be controlled can be maintained.
- 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.
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)
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4124140 | 1991-07-20 | ||
DE4124140A DE4124140C2 (de) | 1991-07-20 | 1991-07-20 | Einrichtung zur lagegerechten Positionierung des Hauptkolbens einer elektro-hydraulischen Stelleinheit |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0528103A1 EP0528103A1 (fr) | 1993-02-24 |
EP0528103B1 true 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)
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 |
Family Cites Families (5)
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 |
DE2835771A1 (de) * | 1978-08-16 | 1980-02-28 | Schwelm & Towler Hydraulics | Anordnung zur aussteuerung eines cartridgeelementes |
DE3125386A1 (de) * | 1981-06-27 | 1983-01-13 | Robert Bosch Gmbh, 7000 Stuttgart | Elektro-hydraulische stelleinrichtung insbesondere zur fernsteuerung eines wegeventils |
DE3527026A1 (de) * | 1985-07-27 | 1987-01-29 | Bosch Gmbh Robert | Elektrohydraulische stelleinheit |
-
1991
- 1991-07-20 DE DE4124140A patent/DE4124140C2/de not_active Expired - Fee Related
-
1992
- 1992-03-17 DE DE59203972T patent/DE59203972D1/de not_active Expired - Fee Related
- 1992-03-17 EP EP92104566A patent/EP0528103B2/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE4124140C2 (de) | 1995-04-13 |
DE4124140A1 (de) | 1993-01-21 |
EP0528103B2 (fr) | 2000-06-28 |
DE59203972D1 (de) | 1995-11-16 |
EP0528103A1 (fr) | 1993-02-24 |
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