EP1915538B1 - Montage pour commander un cylindre d'entrainement hydraulique a double effet - Google Patents

Montage pour commander un cylindre d'entrainement hydraulique a double effet Download PDF

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Publication number
EP1915538B1
EP1915538B1 EP06701053A EP06701053A EP1915538B1 EP 1915538 B1 EP1915538 B1 EP 1915538B1 EP 06701053 A EP06701053 A EP 06701053A EP 06701053 A EP06701053 A EP 06701053A EP 1915538 B1 EP1915538 B1 EP 1915538B1
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EP
European Patent Office
Prior art keywords
valve
control valve
directional control
drive cylinder
hydraulic oil
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
Application number
EP06701053A
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German (de)
English (en)
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EP1915538A1 (fr
Inventor
Ivan Hristov
Josef ZÜRCHER
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Bucher Hydraulics AG
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Bucher Hydraulics AG
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    • 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
    • F15B11/003—Systems with load-holding 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
    • 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
    • F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • 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
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • 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
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • 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
    • F15B13/021—Valves for interconnecting the fluid chambers of an actuator
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/30515—Load holding 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-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
    • F15B2211/30—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
    • F15B2211/3058—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 having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
    • 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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3122—Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
    • F15B2211/3127—Floating position connecting the working ports and 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
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3144—Directional 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
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
    • 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
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31588—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and multiple output members
    • 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
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional 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
    • F15B2211/30—Directional control
    • F15B2211/35—Directional control combined with flow control
    • F15B2211/351—Flow control by regulating means in feed line, i.e. meter-in 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
    • F15B2211/30—Directional control
    • F15B2211/35—Directional control combined with flow control
    • F15B2211/353—Flow control by regulating means in return line, i.e. meter-out 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
    • F15B2211/50—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
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
    • F15B2211/55—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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

Definitions

  • the invention relates to a circuit for controlling a double-acting hydraulic drive cylinder according to the preamble of claim 1.
  • the piping between the directional control valve and the double-acting drive cylinder is often very long, for example 8 m or more.
  • a long hydraulic oil line is a hydraulic resistance, which means energy losses and leads to heating of the hydraulic oil.
  • a controlled float circuit for an actuator is known.
  • additional control means namely a pilot-operated check valve, which is controlled by an electrically controlled valve.
  • the electrically controlled valve in turn is driven by a contact of a switch assembly.
  • a second pilot-operated check valve is also required, which is controlled by a proportional pressure control part.
  • an additional outlet valve is required, which requires actuation by a second proportional pressure control part.
  • a regeneration of the piston chamber to the rod space is therefore possible here in principle, but requires control interventions and is bound to the presence of pilot-operated check valves and their An horrorgane. Hydraulically controlled valves and their actuators, which also act hydraulically, lead to pressure losses and thus require a certain power requirement.
  • the invention has for its object to simplify the hydraulic circuit and at the same time further reduce the power requirement by hydraulic flow resistance and thus the ⁇ lericarmung be minimized.
  • a double-acting hydraulic drive cylinder 1 in which a load 4 is movable by a piston 2 and a piston rod 3 connected thereto. Can be controlled, the drive cylinder 1 by a directional control valve 5, which is controllable in a known manner by 6 drives.
  • the directional control valve 5 has a pump connection P, a tank connection T, a first working connection A and a second working connection B in a known manner.
  • a first drive 6.1 brings in a known manner the directional control valve 5 in that position in which the pump port P to the working port B and the tank port T are connected to the working port A.
  • a second drive 6.2 brings the directional control valve 5 in the position in which the pump port P to the working port A and the tank port T to the working port B are connected. If none of the drives 6 is activated, the directional control valve 5 assumes the drawn position, which represents the neutral position of the directional control valve 5.
  • the drive cylinder 1 has a piston chamber 11 and a rod space 12.
  • the function "lifting” can be achieved for the load 4 by feeding of hydraulic oil in the rod chamber 12 with simultaneous removal of hydraulic oil from the piston chamber 11, the function "lowering".
  • the inflowing and outflowing quantities of hydraulic oil are not the same because of the different cross sections of piston chamber 11 and rod space 12.
  • a flow of the hydraulic oil from the piston chamber port A 11 to the rod space port A 12 is possible, which will be described later.
  • the pressure limiting valve 21 causes the limitation of the pressure in the piston chamber 11.
  • this pressure relief valve 21 opens when the pressure in the piston chamber 11 is higher than the pressure set at the pressure relief valve 21, so that hydraulic oil the piston chamber 11 can flow to reduce the pressure, so limit.
  • the hydraulic oil flows in different ways depending on the operating conditions. With the pressure limiting valve 21, the drive cylinder 1 is secured against external loads.
  • the regeneration check valve 22 opens automatically when at its the piston chamber port A 11 side facing a higher pressure prevails than at its the rod space connection A 12 side facing. For a regeneration of the piston chamber 11 to the rod space 12 is possible without additional control means must be operated.
  • Fig. 1 is - as already mentioned - the neutral position of the directional control valve 5 shown.
  • the two drives 6 are not activated.
  • the two working ports A, B are connected to the tank port T.
  • the pump connection P is shut off.
  • the Load holding valve 26 can be controlled by a control pressure p X , which is present at a control pressure connection X.
  • a first automatic bypass check valve 28 is arranged. Thereby, the blocking effect of the first biasing valve 24 and load-holding valve 26 can be bypassed in one direction, so that hydraulic oil from the working port A of the directional control valve 5 to the piston chamber port A 11 can flow when the directional control valve 5 is driven accordingly. A control intervention is not required.
  • two check valves are connected in anti-parallel, namely a second biasing valve 30 and a second automatic bypass check valve 32.
  • the second biasing valve 30 is thus between the rod chamber 12 and the tank in series with the directional control valve fifth connected.
  • Fig. 2 is the same scheme as in the Fig. 1 shown, but now is the directional control valve 5 in another position, in which the pump port P to the working port B and the tank port T are connected to the working port A.
  • This other position is achieved in that the first drive 6.1 is acted upon by the already mentioned control pressure p X.
  • hydraulic oil flows from the piston chamber 11 because of the here also controlled load-holding valve 26 through this and the regeneration check valve 22 in the rod space 12. Because of Different cross sections of the piston chamber 11 and rod space 12, the difference in quantity over the first biasing valve 24 and thus via the working port A of the directional control valve 5 to the tank port T and thus flow into the tank here.
  • Fig. 1 and 2 are shown states in which the load 4 acts above the drive cylinder 1, because the drive cylinder 1 is inclined so that the load-side end of the piston rod 3 is higher than the piston-side end of the piston rod 3.
  • the extension means the lifting of Load 4 while retracting means lowering the load.
  • the hydraulic drive cylinder 1 always has this position.
  • the retraction is not only by driving the load-holding valve 26 according to here Fig. 1 possible because the load 4 does not press on the piston 2, but pulls on this. Accordingly, it is therefore necessary for retraction, which means in this case the lifting of the load 4, the necessary energy to lift the load 4 by the operation of the pump.
  • the circuit according to the invention also controls this operating state without problems. Additional control means and their operation is not required.
  • the control of load-holding valve 26 and directional control valve 5 is the same as in the Fig. 2 , With the control pressure p X both the load-holding valve 26 and the first drive 6.1 of the directional control valve 5 are acted upon. Therefore, the directional control valve 5 is in the position shown, in which the pump port P to the working port B and the tank port T are connected to the working port A. Thus, the pump delivers hydraulic oil from the pump port P via the working port B through the opening second bypass check valve 32 through the rod space connection A 12 in the rod space 12.
  • the directional control valve 5 assumes the position shown in the directional valve 5, the pump port P is connected to the working port A and the working port B to the tank port T.
  • the pumped by the pump hydraulic oil reads from the pump port P to the working port A and the automatically opening first bypass check valve 28 in the piston chamber 11.
  • hydraulic oil which flows via the self-opening second biasing valve 30 and existing in the directional control valve 5 connection from the working port B to the tank port T in the tank.
  • the load-holding valve 26 is not activated and the regeneration check valve 22 is closed.
  • the extension is independent of the spatial position of the hydraulic drive cylinder 1. If the drive cylinder 1 in the position shown, the extension means lifting the load 4. Is the drive cylinder 1 in the in the Fig. 3 shown position, the extension means lowering the load. Of course, the power to be applied by the pump is different in both cases.
  • associated pressure relief valve 21 has the purpose to protect the drive cylinder 1 during retraction from excessive load. If the pressure in the piston chamber 11 is greater than the pressure set on the pressure limiting valve 21, the pressure limiting valve 21 opens and hydraulic oil flows via the regeneration check valve 22 to the rod chamber 12 and / or via the biasing valve 24 and the directional control valve 5 to the tank. Which way it takes depends on the respective operating conditions.
  • the pressure relief valve 21, the regeneration check valve 22, the first biasing valve 24, the load holding valve 26, the first bypass check valve 28, the second biasing valve 30 and the second bypass check valve 32 in a single valve block 40 and assembled directly to the drive cylinder 1 ,
  • the circuit is the same as the one after Fig. 1
  • the parallel connection of the second biasing valve 30 and the second bypass check valve 32 is omitted.
  • the required for the operation of the circuit bias of the rod chamber 12 is achieved by a in the tank line between the Tank terminal T and the tank arranged further biasing valve 45. So this takes over the function of the second biasing valve 30 after the Fig. 1 to 4 , The described operating behavior does not change as a result.
  • the biasing valve 45 is connected between the rod space 12 and the tank in series with the directional control valve 5.
  • FIG. 6 two parallel working Artriebszylinder 1 are shown. Both attack on the same load 4 '. This is applied when the load 4 'is very heavy.
  • Each drive cylinder 1 is of a similar, that of Fig. 1 corresponding circuit activated.
  • the same reference numbers here mean the same parts as in the Fig. 1 ,
  • the Both drive cylinder 1 are driven in parallel by a single directional control valve 5, so that they are completely similar to the working ports A and B of the directional control valve 5 connected.
  • the two load-holding valve 26 are also driven in parallel by the control pressure p X.
  • each of the drive cylinders 1 is assigned a compensation line nozzle 50 and a compensation line check valve 51, which are arranged parallel to one another in the compensation line 49. This ensures that the pressures in the two piston chambers 11 are equal. If the pressure in one of the piston chambers 11 is greater, then hydraulic oil can flow from this piston chamber 11 into the piston chamber 11 of the other drive cylinder 1, with the hydraulic oil first passing through the closest compensation nozzle 50 and then the compensation power check valve 51 assigned to the other drive cylinder 1 ,
  • valve block 40 may also include the directional control valve 5, as well as the possibly existing additional biasing valve 45th

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Civil Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Analytical Chemistry (AREA)
  • Mining & Mineral Resources (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (5)

  1. Circuit pour le pilotage d'un vérin d'entraînement (1) hydraulique à double effet, étant pilotable par une soupape directionnelle (5) avec des connecteurs de travail A, B, de l'huile hydraulique étant alimentable dans une chambre arrière (11), et, pendant cela, de l'huile hydraulique s'écoulant au même temps hors d'une chambre avant (12), et de l'huile hydraulique étant alimentable dans la chambre avant (12) et, pendant cela, de l'huile hydraulique s'écoulant au même temps hors d'une chambre arrière (11), le circuit comprenant la soupape directionnelle (5), une soupape de décharge de pression (21), une soupape de retenue (26) contrôlable, une soupape anti-retour de régénération (22), une première et une deuxième soupape de précharge (24 et 30) et un premier clapet anti-retour bypass automatique (28),
    - la chambre arrière (11) du vérin d'entraînement (1) étant connectable avec la chambre avant (12) du vérin d'entraînement (1) par un couplage en parallèle de la soupape de décharge de pression (21) et de la soupape de retenue (26) contrôlable et, arrangée en série avec les deux, de la soupape anti-retour de régénération (22) automatique du côté de la chambre avant, qui bloque vers la chambre arrière,
    - la première soupape de précharge (24), qui bloque vers une jonction entre la soupape de décharge de pression (21), la soupape de retenue (26) et la soupape anti-retour de régénération (22), étant connectée dans la jonction, le deuxième accès de laquelle est connecté avec le premier connecteur de travail A de la soupape directionnelle (5),
    - le premier clapet anti-retour bypass automatique (28), qui bloque vers le premier connecteur de travail A, étant arrangé antiparallèle par rapport à la première soupape de précharge (24) et à la soupape de retenue contrôlable (26),
    - la deuxième soupape de précharge (30), qui bloque vers la chambre avant, étant connectable avec la chambre avant (12) et de l'autre côté avec le deuxième connecteur de travail B de la soupape directionnelle (5),
    et
    - la soupape directionnelle (5) ayant une position neutre, dans laquelle le connecteur de pompe P est fermé et les deux connecteurs de travail A, B sont connectés avec le connecteur du réservoir T.
  2. Circuit pour le pilotage d'un vérin d'entraînement (1) hydraulique à double effet, étant pilotable par une soupape directionnelle (5) avec des connecteurs de travail A, B, de l'huile hydraulique étant alimentable dans une chambre arrière (11), et, pendant cela, de l'huile hydraulique s'écoulant au même temps hors d'une chambre avant (12), et de l'huile hydraulique étant alimentable dans la chambre avant (12) et, pendant cela, de l'huile hydraulique s'écoulant au même temps hors d'une chambre arrière (11), le circuit comprenant la soupape directionnelle (5), une soupape de décharge de pression (21), une soupape de retenue (26) contrôlable, une soupape anti-retour de régénération (22), une première et une deuxième soupape de précharge (24 et 30) et un premier clapet anti-retour bypass automatique (28),
    - la chambre arrière (11) du vérin d'entraînement (1) étant connectable avec la chambre avant (12) du vérin d'entraînement (1) par un couplage en parallèle de la soupape de décharge de pression (21) et de la soupape de retenue (26) contrôlable et, arrangée en série avec les deux, de la soupape anti-retour de régénération (22) automatique du côté de la chambre avant, qui bloque vers la chambre arrière,
    - la première soupape de précharge (24), qui bloque vers une jonction entre la soupape de décharge de pression (21), la soupape de retenue (26) et la soupape anti-retour de régénération (22), étant connectée dans la jonction, le deuxième accès de laquelle est connecté avec le premier connecteur de travail A de la soupape directionnelle (5),
    - le premier clapet anti-retour bypass automatique (28), qui bloque vers le premier connecteur de travail A, étant arrangé antiparallèle par rapport à la première soupape de précharge (24) et à la soupape de retenue contrôlable (26),
    - la chambre avant (12) du vérin d'entraînement (1) étant connectable avec le deuxième connecteur de travail B de la soupape directionnelle (5), et
    - la deuxième soupape de précharge (45) étant arrangée au connecteur du réservoir de la soupape directionnelle (5) et
    - la soupape directionnelle (5) ayant une position neutre dans laquelle le connecteur de pompe P est fermé et les deux connecteurs de travail A, B sont connectés avec le connecteur du réservoir T.
  3. Circuit selon la revendication 1, caractérisé en ce qu'un deuxième clapet anti-retour bypass automatique (32) est connecté antiparallèle par rapport à la deuxième soupape de précharge (30).
  4. Circuit selon la revendication 3, caractérisé en ce que la soupape de décharge de pression (21), la soupape anti-retour de régénération (22), la soupape de retenue contrôlable (26), le premier clapet anti-retour bypass automatique (28), la deuxième soupape de précharge (30) et le deuxième clapet anti-retour bypass automatique (32) sont réunis dans un seul bloque de soupapes (40) et en ce que ce bloque de soupapes (40) peut être ajouté directement au vérin d'entraînement (1).
  5. Circuit selon la revendication 4, caractérisé en ce qu'un vérin d'entraînement (1) additionnel avec les mêmes éléments de pilotage (21, 22, 24, 26, 28, 30, 32) est connecté en parallèle avec le vérin d'entraînement (1) et ses éléments de pilotage (21, 22, 24, 26, 28, 30, 32), tous les deux vérins d'entraînement (1) étant pilotable collectivement par une seule soupape directionnelle (5), et en ce que les chambres arrières (11) des deux vérins d'entraînement (1) étant connectés par un tuyau de compensation (49) qui appartient au circuit, une buse du tuyau de compensation (50) et une soupape anti-retour du tuyau de compensation (51) étant attribuées à chaque vérin d'entraînement (1), étant arrangées mutuellement parallèle dans le tuyau de compensation (49).
EP06701053A 2005-08-19 2006-01-27 Montage pour commander un cylindre d'entrainement hydraulique a double effet Expired - Lifetime EP1915538B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH13662005 2005-08-19
PCT/CH2006/000057 WO2007019712A1 (fr) 2005-08-19 2006-01-27 Montage pour commander un cylindre d'entrainement hydraulique a double effet

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EP1915538B1 true EP1915538B1 (fr) 2012-04-04

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EP (1) EP1915538B1 (fr)
JP (1) JP2009505013A (fr)
KR (1) KR20080021779A (fr)
CN (1) CN101253335B (fr)
AT (1) ATE552425T1 (fr)
WO (1) WO2007019712A1 (fr)

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DE102021123223A1 (de) 2021-09-08 2023-03-09 Kramer-Werke Gmbh Hydraulikmaschine mit einem um eine Schwenkachse verschwenkbaren Ausleger
EP4350088A1 (fr) 2022-10-07 2024-04-10 Kramer-Werke GmbH Machine hydraulique avec bras pivotant autour d'un axe de pivotement

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US11225981B2 (en) 2017-05-03 2022-01-18 Cnh Industrial America Llc Vehicle with a boom comprising a hydraulic control circuit with a load control valve
DE102021123223A1 (de) 2021-09-08 2023-03-09 Kramer-Werke Gmbh Hydraulikmaschine mit einem um eine Schwenkachse verschwenkbaren Ausleger
EP4148192A1 (fr) 2021-09-08 2023-03-15 Kramer-Werke GmbH Machine hydraulique dotée d'une flèche pivotante autour d'un axe de pivotement
EP4350088A1 (fr) 2022-10-07 2024-04-10 Kramer-Werke GmbH Machine hydraulique avec bras pivotant autour d'un axe de pivotement
DE102022126009A1 (de) 2022-10-07 2024-04-18 Kramer-Werke Gmbh Hydraulikmaschine mit einem um eine Schwenkachse verschwenkbaren Ausleger

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Publication number Publication date
CN101253335A (zh) 2008-08-27
CN101253335B (zh) 2010-06-16
KR20080021779A (ko) 2008-03-07
WO2007019712A1 (fr) 2007-02-22
US7752842B2 (en) 2010-07-13
EP1915538A1 (fr) 2008-04-30
US20100083651A1 (en) 2010-04-08
JP2009505013A (ja) 2009-02-05
ATE552425T1 (de) 2012-04-15

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