EP4130493A1 - Agencement de commande hydraulique - Google Patents

Agencement de commande hydraulique Download PDF

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Publication number
EP4130493A1
EP4130493A1 EP22186950.6A EP22186950A EP4130493A1 EP 4130493 A1 EP4130493 A1 EP 4130493A1 EP 22186950 A EP22186950 A EP 22186950A EP 4130493 A1 EP4130493 A1 EP 4130493A1
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EP
European Patent Office
Prior art keywords
valve
control
control arrangement
working lines
pressure
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
EP22186950.6A
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German (de)
English (en)
Other versions
EP4130493B1 (fr
Inventor
Andreas Guender
Henning Freigang
Marc Weigand
Jan Lukas Bierod
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP4130493A1 publication Critical patent/EP4130493A1/fr
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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
    • F15B11/02—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
    • 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
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • 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"
    • 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
    • F15B2211/3056—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
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
    • 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
    • F15B2211/32—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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
    • 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
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/634—Electronic controllers using input signals representing a state of a 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • 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
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6658—Control using different modes, e.g. four-quadrant-operation, working mode and transportation 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/765—Control of position or angle of the output member

Definitions

  • the invention relates to a hydraulic control arrangement for actuating a hydraulic actuator/consumer, in particular a differential hydraulic cylinder, according to the preamble of patent claim 1.
  • regeneration is understood to mean the feeding back of fluid from a (piston) rod side of the hydraulic cylinder to a piston side of the hydraulic cylinder, in that the two sides are fluidly connected to one another.
  • a load holding function is understood to mean blocking the movement of a piston of the hydraulic cylinder.
  • An internally known control arrangement has a directional valve for this purpose, which connects two working lines, which are connected to pressure chambers of the actuator (hydraulic cylinder) acting in opposite directions, to a pressure medium source or a pressure medium sink, depending on the switching position.
  • a check valve is arranged in each of the two working lines (power pressure lines), which can be unlocked by pressurizing the respective other working line.
  • a load-dependent valve is arranged in a short-circuit line connecting the two working lines, which switches between the functions of load holding and normal and regeneration switching. This means that the function switchover takes place without electrical control signals.
  • the disadvantage of the known control arrangement is that it cannot be used with switching loads can be used, so that a four-quadrant operation is not possible.
  • the mutually unlockable check valves may not have clearly defined switching states, which greatly impairs the control functionality.
  • the function switchover of the normal and regeneration switching must already be set mechanically during project planning or during commissioning.
  • Another internally known control arrangement also has a directional control valve, which applies pressure to or relieves pressure from the two working lines depending on the switching position, and a check valve arranged in each of the two working lines.
  • a first solenoid valve is used to unblock the check valves and a second solenoid valve is used to short-circuit the two working lines so that the functions of load holding and normal and regeneration switching can be switched under valve control. This means that the function switchover takes place by means of two electrical control signals.
  • the disadvantage of this solution is that two solenoid valves are required, so that this control arrangement is cost-intensive due to the number of solenoid valves and the power electronics required for an output stage for switching.
  • the invention is based on the object of providing a hydraulic control arrangement with which the hydraulic functions described can be implemented, but which at the same time has a simple, compact and inexpensive design.
  • the control arrangement serves to actuate a hydraulic actuator, in particular a differential hydraulic cylinder.
  • the control arrangement has two working lines, one of which can be connected to pressure chambers of the actuator that act in opposite directions in order to actuate the actuator, and in each of which a pilot-operated check valve is arranged, the blocked flow direction of which can be released or released from the direction of the pressure chambers by hydraulic actuation becomes.
  • the Control arrangement on a proportional valve through which the two working lines depending on the (switching) position of the proportional valve to pressurize the associated pressure chamber with a pressure medium source or to relieve the pressure of the associated pressure chamber with a pressure medium sink can be connected.
  • control arrangement has a short-circuit line which connects the two working lines to one another with the interposition of two non-return valves having opposite flow directions.
  • one of the check valves arranged in the short-circuit line can be locked and the other of the check valves arranged in the short-circuit line can be unlocked.
  • control arrangement has a preferably magnetically controlled switching valve, through which the pilot-operated check valves arranged in the working lines and the lockable check valve arranged in the short-circuit line can be controlled hydraulically in a switching position of the switching valve.
  • the control arrangement according to the present invention has a first working line, which can be (or is) connected to a first pressure chamber of an actuator, so that the actuator can be moved by pressurizing the first working line in a first direction, in particular in an extension direction of a hydraulic cylinder, for example of such an actuator, is adjustable, as well as a second working line, which can be (or is) connected to a second pressure chamber of the actuator, so that the actuator can be moved by pressurizing the second working line in a second direction, in particular a retraction direction of the hydraulic cylinder as an example of such an actuator , is adjustable.
  • a first non-return valve is arranged in the first working line and a second non-return valve is arranged in the second working line, which in each case allows a flow of pressure medium only in the direction of the actuator or the respective pressure chamber and blocks it in a blocking direction/opposite direction/opposite direction.
  • the first and second check valve are designed to be unlockable in the sense that the blocking direction is released/unblocked when pressure is applied to a control connection of the respective check valve (controlled).
  • the control arrangement has the proportional valve, which is used for the continuous regulation of a hydraulic resistance and, depending on the (switching) position, the first working line or second working line for pressurizing with a pump/the Pressure medium source or a tank / the pressure medium sink connects.
  • control arrangement has a short-circuit line, through which the two working lines are or can be fluidly connected to one another.
  • a third check valve arranged in the short-circuit line enables a flow of pressure medium in only one flow direction from one working line into the other working line, in particular from the second working line into the first working line, and blocks a flow of pressure medium in a blocking direction/opposite direction/opposite direction, in particular out the first working line into the second working line.
  • a fourth check valve arranged in the short-circuit line allows pressure medium to flow in only one flow direction from the other working line into one working line, in particular from the first working line into the second working line, and blocks a pressure medium flow in a blocking direction/opposite direction/opposite direction, in particular from the second line into the first line.
  • the third check valve is designed to be lockable, i.e. the direction of flow is closed/blocked when pressure is applied to a control connection of the third check valve (controlled).
  • the fourth check valve is designed to be unlockable in the sense that the blocking direction is released/unblocked when pressure is applied to a control connection of the fourth check valve (controlled).
  • the control arrangement has a switching valve which controls/switches the first, second and third check valve.
  • the switching valve in a first switching position relieves the pressure on the control connections of the first, second and third check valve, i.e. does not control these three check valves (in the above sense), and in a second switching position pressurizes the control connections of the first, second and third check valve, i.e. controls these three check valves (in the above sense).
  • control arrangement according to the invention has (only) one switching valve, by means of which three of the four check valves can be activated hydraulically at the same time.
  • the inventive structure of the control arrangement has the advantage that the three hydraulic functions of a normal circuit / force-position control, one Regeneration switching and load holding can be realized and at the same time it is possible to switch between the hydraulic functions in a defined manner only by means of a proportional valve (with integrated controller), a magnetically controlled switching valve and logic elements in the form of lockable/unlockable check valves.
  • a proportional valve with integrated controller
  • a magnetically controlled switching valve in the form of lockable/unlockable check valves.
  • the releasable check valve arranged in the short-circuit line can be activated hydraulically when pressure is applied to a first working line of the two working lines.
  • the short-circuit line can be connected to the working lines downstream of the pilot-operated check valves arranged in the working lines.
  • the proportional valve can have a zero position, in which the two working lines are depressurized, and control positions in which a hydraulic resistance between the working lines on the one hand and the pressure medium source and the pressure medium sink on the other hand can be adjusted.
  • a force-position control can be implemented in an actuated switching position of the switching valve and the control positions of the proportional valve
  • a regeneration circuit can be implemented in the actuated switching position of the switching valve and the control positions of the proportional valve, and in an unactuated switching position of the switching valve and the Zero position of the proportional valve be realized a load holding function.
  • control electronics and power electronics for controlling the proportional valve can be mounted directly on the proportional valve.
  • a particularly compact structure can thus be implemented.
  • the proportional valve can be designed as an integrated axle control valve (IAC valve), so that an already existing component can be used.
  • IAC valve integrated axle control valve
  • one of the two working lines or both working lines can be connected to the pressure medium sink via a pressure control valve/pressure limiting valve.
  • the first working line can be connected to the pressure medium sink via a first pressure control valve and/or the second working line can be connected to the pressure medium sink via a second pressure control valve.
  • a pressure sensor can be arranged in one of the two working lines or in both working lines. This means that a first pressure sensor is arranged in the first working line and/or a second pressure sensor is arranged in the second working line. By detecting the pressure in the working lines, force-position control can be implemented with the hydraulic control arrangement.
  • control arrangement can have a displacement sensor for detecting the position of the actuator and the proportional valve can have an input for a signal from the displacement sensor.
  • Efficient force-position control can be implemented by detecting the position of the actuator, in particular of the hydraulic cylinder, which is transmitted to the proportional valve.
  • the proportional valve can have a second travel sensor for detecting the position of a control piston of the proportional valve. That means that a displacement encoder in the Proportional valve is integrated so that the position data of the spool can be used for control.
  • FIG. 1 a simplified hydraulic circuit diagram of a hydraulic control arrangement.
  • the control arrangement 1 serves to actuate a hydraulic actuator 2.
  • the actuator 2 which is designed in particular as a differential hydraulic cylinder, can be supplied with pressure medium via a pressure medium source (not shown) and via a (not shown) pressure medium sink depressurized.
  • a first pressure chamber 3 of the actuator 2 on the piston side is connected to a first working line 4 of the control arrangement 1 and a second pressure chamber 5 of the actuator 2 on the piston rod side is connected to a second working line 6 of the control arrangement 1 .
  • the actuator 2 has a displacement sensor 7 for detecting the position of the actuator 2, ie the differential hydraulic cylinder.
  • the first working line 4 and the second working line 6 can be connected to the pressure medium source via a pressure connection 8/P connection of the control arrangement 1 or to the pressure medium sink via a tank connection 9/T connection of the control arrangement 1.
  • the control arrangement 1 has a proportional valve/proportional directional control valve 10 which, depending on the switching position, connects the pressure port 8 or the tank port 9 to the first working line 4 (A port) or to the second working line 6 (B port).
  • a first switching end position 11 of the proportional valve 10 the pressure port 8 is connected to the first working line 4 and the tank port 9 is connected to the second working line 6 .
  • a second switching end position 12 of the proportional valve 10 the tank port 9 is connected to the first working line 4 and the pressure port 8 is connected to the second working line 6 .
  • a switching center position 13 of the proportional valve 10 there is a pressure-free circulation between the pressure connection 8 and the tank connection 9 , and the first working line 4 and the second working line 6 are relieved towards the tank connection 9 .
  • Switching center position 13 is a floating position.
  • a zero position 14 of the proportional valve 10 the first working line 4 and the second working line 6 are connected to the tank port 9, and the pressure port 8 is blocked.
  • the neutral position 14 is a floating position.
  • the proportional valve 10 can be actuated by an electromagnet 15 .
  • the proportional valve 10 is in the neutral position 14 when it is not actuated.
  • the proportional valve 10 has control electronics 17 .
  • the proportional valve 10 can have an input for a signal from the displacement sensor 7 .
  • the control arrangement 1 has a switching valve 18 which, depending on the switching position, connects the pressure connection 8 or the tank connection 9 to a control line 19 .
  • a switching valve 18 which, depending on the switching position, connects the pressure connection 8 or the tank connection 9 to a control line 19 .
  • the control line 19 In a first switching position 20 of the switching valve 18 the control line 19 is connected to the tank connection 9 .
  • a second switching position 21 of the switching valve 18 the control line 19 is connected to the pressure port 8 .
  • the switching valve 18 can be actuated by an electromagnet 22 . When not actuated, the switching valve 18 is in the first switching position 20.
  • a first check valve 23 is arranged in the first working line 4 and is arranged between the proportional valve 10 and the actuator 2 .
  • the first check valve 23 enables a flow of pressure medium in the direction of the actuator 2/from the proportional valve 10 and blocks a flow of pressure medium from the actuator 2/back to the proportional valve 10.
  • the first check valve 23 is switchable/controllable.
  • the first check valve 23 can be actuated hydraulically through the control line 19, i.e. through the switching valve 18.
  • the first check valve 23 can be unlocked so that it is prevented from closing when it is actuated hydraulically.
  • a second check valve 24 is arranged in the second working line 6 and is arranged between the proportional valve 10 and the actuator 2 .
  • the second check valve 24 enables a flow of pressure medium in the direction of the actuator 2/from the proportional valve 10 and blocks a flow of pressure medium in the direction from the actuator 2/back to the proportional valve 10.
  • the second check valve 24 is designed to be switchable/controllable.
  • the second check valve 24 can be actuated hydraulically through the control line 19 , ie through the switching valve 18 .
  • the second check valve 24 can be unlocked so that it is prevented from closing when it is actuated hydraulically.
  • the control arrangement 1 has a short-circuit line 25 which connects the first working line 4 to the second working line 6 .
  • the short-circuit line 25 is connected to the first working line 4 downstream of the first check valve 23 and to the second working line 6 downstream of the second check valve 24 .
  • a third check valve 26 is arranged in the short-circuit line 25 , which enables a flow of pressure medium in the direction from the second working line 6 and blocks it in the direction back into the second working line 6 .
  • the third check valve 26 is switchable/controllable.
  • the third check valve 26 can be actuated hydraulically through the control line 19, i.e. through the switching valve 18.
  • the third non-return valve 26 can be blocked so that it is prevented from opening when it is actuated hydraulically.
  • a fourth non-return valve 27 is arranged in the short-circuit line 25 and allows a flow of pressure medium in the direction from the first working line 4 and blocks it in the direction back into the first working line 4 .
  • the fourth check valve 27 is switchable/controllable.
  • the fourth check valve 27 can be controlled hydraulically through the first working line 4 .
  • the fourth check valve 27 can be unlocked so that it is prevented from closing when it is actuated hydraulically.
  • control arrangement 1 has a first pressure sensor 28 connected to the first working line 4 and a second pressure sensor 29 connected to the second working line 6 . Furthermore, the control arrangement 1 has a first pressure-limiting valve 30 connecting the first working line 4 to the tank port 9 and a second pressure-limiting valve 31 connecting the second working line 6 to the tank port 9 .
  • the hydraulic control arrangement 1 works according to the following mode of operation: In a first operating state, a hydraulic function of a regeneration circuit is implemented, in which the hydraulic cylinder extends and the two pressure chambers 3 , 5 of the hydraulic cylinder are hydraulically connected via the short-circuit line 25 .
  • the proportional valve 1 is under control, ie the proportional valve 10 connects the pressure port 8 to the first working line 4, and the switching valve 18 is closed, ie in its first switching position 20.
  • the hydraulic cylinder moves out and can be controlled by means of force-position control through the proportional valve 10, while the pressure caused by friction in the first working line 4 or the first pressure chamber 3 the pilot-operated fourth check valve 27 in the short-circuit line 25 is opened so that the first working line 4 and the second working line 6 are connected to one another and the hydraulic cylinder can extend at a higher speed.
  • a hydraulic function of force-position control is implemented.
  • the proportional valve 1 is under control, i.e. the proportional valve 10 is not in the zero position 14, and the switching valve 18 is open, i.e. in its second switching position 21.
  • the force-position control is carried out by the proportional valve 10, in particular also by the Displacement sensor 16 and the input for the signal of the displacement sensor 7.
  • the lockable third check valve 26 is hydraulically controlled by the switching valve 18, so that the first working line 4 and the second working line 6 are separated.
  • the pilot-operated first check valve 23 and the pilot-operated second check valve 24 are controlled hydraulically by the switching valve 18 so that they are open in a defined manner and four-quadrant operation is possible.
  • a hydraulic function of a load-holding circuit is implemented.
  • the proportional valve 1 is not under control, i.e. the proportional valve 10 is in the zero position 14, and the switching valve 18 is closed, i.e. in a first switching position 20.
  • the check valves 23, 24, 26, 27 are not hydraulically activated and are located in their basic position.
  • the connection between the first working line 4 and the second working line 6 is closed in a defined manner and the first non-return valve 23 that can be opened and the second non-return valve 24 that can be opened are closed in a defined manner by the load.
  • the check valves 23, 24, 26, 27 are preferably designed as seat valves, so that no leakage and thus no creeping hydraulic cylinder movement is possible.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
EP22186950.6A 2021-08-02 2022-07-26 Agencement de commande hydraulique Active EP4130493B1 (fr)

Applications Claiming Priority (1)

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DE102021208330.7A DE102021208330B3 (de) 2021-08-02 2021-08-02 Hydraulische Steueranordnung

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EP4130493A1 true EP4130493A1 (fr) 2023-02-08
EP4130493B1 EP4130493B1 (fr) 2024-03-27

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CN (1) CN115701492A (fr)
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009001137A (ja) * 2007-06-21 2009-01-08 Shin Meiwa Ind Co Ltd コンテナ荷役車両用荷役装置
DE102018004769A1 (de) * 2018-06-13 2019-12-19 Hydac Mobilhydraulik Gmbh Steuervorrichtung
JP2020007160A (ja) * 2019-09-26 2020-01-16 古河ユニック株式会社 増速弁装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016106616B4 (de) 2016-04-11 2023-07-06 Schwing Gmbh Elektrohydraulischer Steuerkreis für einen Großmanipulator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009001137A (ja) * 2007-06-21 2009-01-08 Shin Meiwa Ind Co Ltd コンテナ荷役車両用荷役装置
DE102018004769A1 (de) * 2018-06-13 2019-12-19 Hydac Mobilhydraulik Gmbh Steuervorrichtung
JP2020007160A (ja) * 2019-09-26 2020-01-16 古河ユニック株式会社 増速弁装置

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EP4130493B1 (fr) 2024-03-27
DE102021208330B3 (de) 2022-12-22
CN115701492A (zh) 2023-02-10

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