EP0203100B1 - Installation hydraulique - Google Patents

Installation hydraulique Download PDF

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Publication number
EP0203100B1
EP0203100B1 EP85905393A EP85905393A EP0203100B1 EP 0203100 B1 EP0203100 B1 EP 0203100B1 EP 85905393 A EP85905393 A EP 85905393A EP 85905393 A EP85905393 A EP 85905393A EP 0203100 B1 EP0203100 B1 EP 0203100B1
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EP
European Patent Office
Prior art keywords
pressure
line
valve
way
consumer
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
Application number
EP85905393A
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German (de)
English (en)
Other versions
EP0203100A1 (fr
Inventor
Wolfgang KÖTTER
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0203100A1 publication Critical patent/EP0203100A1/fr
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Publication of EP0203100B1 publication Critical patent/EP0203100B1/fr
Expired 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
    • F15B11/16—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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F15B2211/20507—Type of prime mover
    • F15B2211/20523—Internal combustion engine
    • 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
    • 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
    • F15B2211/30505—Non-return valves, i.e. check 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
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing 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
    • F15B2211/50—Pressure control
    • F15B2211/51—Pressure control characterised by the positions of the valve element
    • F15B2211/513—Pressure 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure 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
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/528—Pressure 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
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief 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
    • F15B2211/50—Pressure control
    • F15B2211/575—Pilot pressure control
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief valves

Definitions

  • the invention is based on a hydraulic system according to the preamble of the main claim.
  • part of the consumer flow is branched off at the directional control valves via a bypass, which has a check valve and a throttle, in order to adjust the controller of the motor driving the pump so that the actuation speed of the consumer does not exceed or exceed certain values falls below.
  • This control means does not work precisely enough for all applications, especially not when a certain consumer is to be operated (US-A-3 866 418).
  • a device for actuating the throttle valve of an internal combustion engine has become known, which has a hydraulic sensor device connected to the pressure line to the consumer. This is designed so that a constant flow of liquid flows to the consumer regardless of the load on the consumer.
  • the sensor device has a piston controlled by the differential pressure, which acts on a control circuit which is independent of the consumer circuit.
  • the actuating force for the actuating device comes from a compressed air system, which makes the device more expensive.
  • such a device is not suitable if several hydraulic consumers are combined in one block (US-A-3 967 625).
  • the required speed increase for small and medium-sized consumers, for example, is possible to a fixed value and proportional to the slide deflection for said consumer.
  • This object is achieved according to the invention by the means mentioned in the characterizing part of claim 1. In this way, an economical supply of the hydraulic system is possible because the power of the drive motor is better adapted to the requirements of the consumer.
  • FIGS. 1 and 2 Two embodiments of the invention are shown in the drawing and explained in more detail in the following description. These show a schematic representation of hydraulic systems in FIGS. 1 and 2, and a diagram in FIG. Description of the embodiment
  • 10 denotes a non-adjustable pump that draws pressure medium from a container 11 and displaces it into a delivery line 12.
  • the pump 10 is driven by an internal combustion engine 13, in particular a diesel engine, the member 14 determining the fuel supply - in the case of a diesel engine, the injection pump or its speed controller - is adjusted by means of a hydraulically actuated steep cylinder 15. This is pressurized via a line 16 with pressure medium, which leads to a valve control block 17.
  • this three series valves 18 to 20 are arranged in series, of which the directional valve 18 controls a single-acting consumer, the directional valves 19, 20 control double-acting consumers.
  • the delivery line 12 also leads to the control block 17.
  • a neutral circulation line 12A is connected to it, which starts from an end plate 22 closing the control block and ends at a pressure relief valve 23. From this line 24 leads to a return line 25, which is also passed through the control block 17. From the delivery line 12 branch in the control block 17 a line 26 which leads to the pressure relief valve, further a line 27 which leads to a pressure control valve 28, a line 29 which leads to the directional control valve 18, a line 30 which leads to the directional control valve 19 and a line 31 leading to the directional control valve 20.
  • a first line 32 leads to a single-acting consumer (not shown), a second line 33 to line 16 and a line 34 to a line 35, which leads from the return line 25 to the outflow side of the pressure control valve 28.
  • a line 37 branches off from the line 33 and leads to one end 28A of the pressure control valve 28, on the opposite end 28B of which a control spring 38 acts.
  • a throttle 39 is arranged in the line 33 shortly before the junction with the line 16.
  • the pressure control valve 28 either makes a connection from the line 27 connected to the delivery line 12 to the line 16 or to the line 35 connected to the return line 25.
  • the pressure control valve 28 is controlled by the liquid pressure acting on its surface 28 A against the force the spring 38.
  • the directional control valve 18 can assume three switch positions I, II and 111, position II being the blocking position, the position the working position, the position III the relief position.
  • This directional control valve is designed as a 6/3-way valve and in its position I on the one hand establishes a connection from line 29 to line 32 and thus to the consumer and on the other hand from line 34 to line 33 and thus to line 16.
  • a line 41 leads to the return line 25 and two lines 42, 43 to a double-acting consumer, not shown.
  • the situation is similar with the directional valve 20; here a line 44 leads to the return line 25 and two lines 45, 46 also to a double-acting consumer.
  • the directional control valves 19, 20 are also designed as 6/3 directional control valves and have the same switch positions I. To III as the directional control valve 18. This differs from the directional control valves 19, 20, however, in that in the working position I between the connections a and b, d. H. an adjustable throttle 48 is formed between the lines 33 and 34. In reality, this looks like that - as is known per se - there is a control groove on the spool edge, which opens more and more with increasing displacement of the spool, so that the flow cross-section from line 33 to line 34 is increasingly opened.
  • pressure medium flows from the consumers connected to the directional control valves 19, 20 via line 43 or 46 to the container. If the directional control valve 18 is now shifted from its neutral position II in the direction of the working position I - either alone or with simultaneous actuation of one of the valves 19, 20, pressure medium flows on the one hand via the line 32 to the consumer, and on the other hand from the pressure surface 28A of the pressure control valve 28 via the line 37 and the line 33 as well as the directional control valve 18 and the line 34 increasingly to the return line 25. This flow is limited by the throttle 48 in the directional control valve 18.
  • the exemplary embodiment according to FIG. 2 differs from that according to FIG. 1 essentially only in that it is a so-called load-sensing hydraulic circuit which has a flow control valve 55 which is connected to the delivery line 12 and which has a connecting line 56 to the return line 25 Has.
  • a control line 57 is provided in the control block, in which an alternating check valve 58 is assigned to each directional control valve.
  • the directional valves essentially correspond to those described above, but with the difference that there is still a connecting line to the shuttle valve 58. The highest pressure prevailing at a consumer is selected in each case via these alternating check valves and is brought to the flow control valve 55 via a line 60.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

L'installation hydraulique comporte une pompe (10), entraînée par exemple par un moteur diesel (13), qui transmet les moyens de pression aux utilisateurs par l'intermédiaire de distributeurs (18 à 20) à plusieurs voies. Le régulateur de vitesse (14) de la pompe d'injection du moteur diesel est commandé par un cylindre de positionnement (15) actionné par la pression, sur lequel agit, dans une ligne de commande (16), la pression produite pour augmenter la vitesse de rotation du moteur à combustion interne. Cette pression est commandée conjointement à l'aide de l'un des distributeurs à plusieurs voies (18) pour un utilisateur opérant seul et d'un régulateur de pression (28), de sorte que, lors du fonctionnement d'un distributeur à plusieurs voies normal, une pression constante est produite dans la ligne (16). Lors du fonctionnement de l'autre distributeur à plusieurs voies (18) pour l'utilisateur opérant seul, un rebord de commande spécial (48) se déclanche, ce qui produit une pression croissante dans la ligne (16), proportionnelle au débattement du tiroir de distribution. Il s'ensuit que la vitesse de rotation du moteur à combustion interne et par conséquent de la pompe (10) est augmentée et réglée de telle sorte que les utilisateurs reçoivent exactement la pression nécessaire. Ce système permet un fonctionnement économique.

Claims (4)

1. Installation hydraulique alimentant plusieurs utilisateurs par l'intermédiaire de vannes à plusieurs voies (18-20) comportant une pompe (12) entraînée par un moteur (13) à vitesse de rotation réglable, le régulateur (14) qui règle la vitesse de rotation du moteur étant réglé par un moyen de réglage (28) et un vérin de réglage (15) alimenté par une conduite (16) en fonction du réglage de la vanne à plusieurs voies (18-20), installation caractérisée en ce que le moyen de commande est une vanne de régulation de pression (28) qui commande la pression régnant dans la conduite 16 et la chambre de pression (28 A) de la vanne de régulation de pression (28) est reliée, d'une part, au vérin de réglage (15) par une première conduite de liaison comportant un organe d'étranglement (39) et, d'autre part, au retour (25) par une seconde conduite de liaison (33) allant au-delà et qui pour la position de travail (I) de l'une des vannes à plusieurs voies (18) réalise cette liaison par un organe d'étranglement (48) réglable prévu dans cette vanne, de manière que, lors-de la commande de cette vanne à plusieurs voies (18), la vanne de régulation de pression donne à l'utilisateur une pression croissante proportionnelle au mouvement du tiroir de cette vanne et que, lors de la mise en oeuvre d'une autre des vannes à plusieurs voies (19, 20), on obtienne une pression constante pour les autres utilisateurs.
2. Installation selon la revendication 1, caractérisée en ce que l'organe d'étranglement réglable est constitué par une arête de commande particulière (48) de l'une des vannes à plusieurs voies (18) avec une phase de commande fine.
3. Installation selon la revendication 1 et/ou 2, caractérisée en ce qu'une vanne à plusieurs voies (18) commande un utilisateur à simple effet et commande en position de travail (I) une liaison entre la conduite (16) et la conduite de retour (25).
4. Installation selon l'une des revendications 1 à 3, caractérisée en ce que la vanne de régulation de pression (28) est intégrée à l'une des vannes à plusieurs voies (18).
EP85905393A 1984-11-28 1985-10-28 Installation hydraulique Expired EP0203100B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3443354 1984-11-28
DE19843443354 DE3443354A1 (de) 1984-11-28 1984-11-28 Hydraulikanlage

Publications (2)

Publication Number Publication Date
EP0203100A1 EP0203100A1 (fr) 1986-12-03
EP0203100B1 true EP0203100B1 (fr) 1989-09-20

Family

ID=6251359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85905393A Expired EP0203100B1 (fr) 1984-11-28 1985-10-28 Installation hydraulique

Country Status (5)

Country Link
US (1) US4716727A (fr)
EP (1) EP0203100B1 (fr)
JP (1) JPH0625561B2 (fr)
DE (2) DE3443354A1 (fr)
WO (1) WO1986003264A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005966A1 (de) * 1990-02-26 1991-08-29 Rexroth Mannesmann Gmbh Ventilanordnung zum steuern mehrerer parallel betaetigter hydraulischer verbraucher
DE4005967A1 (de) * 1990-02-26 1991-08-29 Rexroth Mannesmann Gmbh Lastunabhaengige ventilsteuerung fuer mehrere gleichzeitig ansteuerbare hydraulische verbraucher

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3711233A1 (de) * 1987-04-03 1988-10-20 Linde Ag Antriebseinrichtung mit einer primaerenergiequelle, einem getriebe und einer pumpe
DE3714304A1 (de) * 1987-04-29 1988-11-10 Rexroth Mannesmann Gmbh Ventilanordnung
DE3821348C2 (de) * 1988-06-24 1997-09-11 Linde Ag Hydraulisches System
DE3902252C1 (fr) * 1989-01-26 1990-01-18 Alfred Kaercher Gmbh & Co, 7057 Winnenden, De
DE4020476A1 (de) * 1990-06-27 1992-01-02 Rexroth Mannesmann Gmbh Hydraulische steuereinrichtung
WO1994010454A1 (fr) * 1992-10-23 1994-05-11 Kabushiki Kaisha Komatsu Seisakusho Systeme d'alimentation en huile sous pression a soupape de compensation de pression
DE4316361C2 (de) * 1993-05-15 1999-04-01 Radosav Nikolic Hydraulisch arbeitendes Flurförderzeug
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Publication number Publication date
WO1986003264A1 (fr) 1986-06-05
JPS62500798A (ja) 1987-04-02
US4716727A (en) 1988-01-05
JPH0625561B2 (ja) 1994-04-06
EP0203100A1 (fr) 1986-12-03
DE3443354A1 (de) 1986-05-28
DE3573154D1 (en) 1989-10-26

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