EP1387090A2 - Dispositif à actionnement hydraulique - Google Patents

Dispositif à actionnement hydraulique Download PDF

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Publication number
EP1387090A2
EP1387090A2 EP03015768A EP03015768A EP1387090A2 EP 1387090 A2 EP1387090 A2 EP 1387090A2 EP 03015768 A EP03015768 A EP 03015768A EP 03015768 A EP03015768 A EP 03015768A EP 1387090 A2 EP1387090 A2 EP 1387090A2
Authority
EP
European Patent Office
Prior art keywords
pressure
hydraulic drive
line
pump
drive according
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
EP03015768A
Other languages
German (de)
English (en)
Other versions
EP1387090A3 (fr
EP1387090B1 (fr
Inventor
Michael Bökmann
Norbert Gwozdz
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.)
Bosch Rexroth AG
Original Assignee
Bosch Rexroth AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10329067A external-priority patent/DE10329067A1/de
Application filed by Bosch Rexroth AG filed Critical Bosch Rexroth AG
Priority to EP04029899.4A priority Critical patent/EP1564414B1/fr
Publication of EP1387090A2 publication Critical patent/EP1387090A2/fr
Publication of EP1387090A3 publication Critical patent/EP1387090A3/fr
Application granted granted Critical
Publication of EP1387090B1 publication Critical patent/EP1387090B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • 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"
    • F15B11/0423—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" by controlling pump output or bypass, other than to maintain constant speed
    • 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"
    • F15B11/0426—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" by controlling the number of pumps or parallel valves switched on
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1476—Special return means
    • 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
    • F15B2211/20515—Electric motor
    • 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
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20584—Combinations of pumps with high and low capacity
    • 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
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
    • F15B2211/41536—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve being connected to multiple ports of an 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
    • F15B2211/40—Flow control
    • F15B2211/47—Flow control in one direction only
    • F15B2211/473—Flow control in one direction only without restriction in the reverse direction
    • 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
    • F15B2211/505—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
    • F15B2211/515—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
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5153—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member 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
    • F15B2211/55—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
    • F15B2211/60—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
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
    • 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
    • F15B2211/75—Control of speed of the output member

Definitions

  • the invention relates to a hydraulic drive for a consumer, especially for a Hydraulic cylinder according to the preamble of the claim 1.
  • a hydraulic drive is known from US Pat. No. 6,379,119 known for a lifting cylinder.
  • a bottom one Cylinder space of the lifting cylinder is constant Pump with variable-speed electric motor with pressure medium supplied from a tank.
  • a piston rod side Annulus of the lifting cylinder is with a hydraulic accumulator connected.
  • the in the stroke direction (extension of the cylinder) effective pressure is thus through the constant pump and in the opposite direction effective pressure by the pressure in Hydraulic accumulator determined.
  • To retract the hydraulic cylinder is the control of the constant pump Reverse direction of rotation, so that pressure medium from the Cylinder space is flowing into the tank and the cylinder by the pressure in the hydraulic accumulator or annulus and the The weight of the load retracts.
  • the constant pump works as a motor and the electric motor as a generator, see above that the power gained is fed back into the network can be.
  • the hydraulic accumulator is filled via a Switching valve, which in normal operation of the lifting cylinder is in a locked position and in a resting phase of the or of the consumers connected to the constant pump in a through position is brought so that the Hydraulic accumulator can be charged via the constant pump can.
  • a hydraulic drive is in DE 196 31 804 A1 for a lifting cylinder of an elevator, which is disclosed as this is designed as a plunger cylinder.
  • the cylinder space becomes a load via a constant pump pressurized by a variable-speed drive is driven.
  • a variable-speed drive is driven.
  • the throttle becomes a pressure medium flow branched off to the tank so that the pump with higher Speed must run than this without the throttle open would be the case.
  • This increase in speed is a even supply of pressure medium to the consumer and Lubrication of the constant pump guaranteed.
  • To lower the load becomes the direction of rotation of the constant pump vice versa, so this as the motor and the connected Electric motor works as a generator.
  • the invention has for its object a hydraulic Drive for one of a pump arrangement and a hydraulic accumulator pressurized consumer to develop such that the pressure in the hydraulic accumulator constant with little expenditure on device technology can be held.
  • the hydraulic drive has a Bypass line, via which one from the pump arrangement to Consumer leading pressure line and one from the hydraulic accumulator storage line leading to the consumer with each other are connected.
  • a bypass line Current valve or a pressure reducing valve provided over that for filling the hydraulic accumulator pressure medium from the Pressure line can flow into the storage line, so that it is guaranteed that the hydraulic accumulator also during of the operation of the consumer can be charged.
  • the flow control valve can - preferably adjustable - choke or a flow control valve.
  • the consumer is preferably a hydraulic cylinder executed.
  • the pump arrangement is via a pressure line to a cylinder chamber on the bottom and the hydraulic accumulator via the storage line to a piston rod side Annulus is connected.
  • the Bypass line via a pressure relief valve with a Tank connected so that the maximum storage pressure through limits the value set on the pressure relief valve is.
  • the hydraulic accumulator via the bypass line can prevent in this one towards the storage line opening check valve are provided.
  • this bypass line can also be in the piston of the cylinder can be integrated.
  • the consumer preferably the cylinder, is at an advantageous embodiment, a displacement sensor assigned via which the stroke position of the piston is detected and a corresponding control of the pump arrangement and possibly the throttle device.
  • this can be a Safety valve upstream.
  • this is achieved by a Valve arrangement achieved via the at low consumer pressure both pumps are connected to the consumer and when a threshold pressure is reached, the pump with the larger stroke volume on pressureless circulation or the same is switched so that only the smaller pump is effective.
  • the hydraulic drive according to the invention can be particularly advantageous for a bending cylinder Insert bending press.
  • the single figure shows a circuit diagram of an inventive hydraulic drive for a bending press.
  • a bending press 1 has a double-acting design Bending cylinder 2, one over a machine bed clamped workpiece 4 with the one for bending required force can be applied.
  • the bending cylinder 2 is an open circuit hydraulic drive with a pump arrangement 6 and a Hydraulic accumulator 8 assigned.
  • the pump arrangement 6 can be drawn from a tank T and via a pressure medium Pressure line 10 in a bottom-side cylinder space 12 of the bending cylinder 2 are promoted.
  • the hydraulic accumulator 8 is via a storage line 14 with a piston rod side Annulus 16 of the bending cylinder 2 connected.
  • the pump arrangement 6 has a variable-speed drive 18, so that to extend the bending cylinder 2 to the workpiece 4 out pressure medium from the tank T via the pump arrangement 6, the pressure line 10 into the cylinder space 12 is promoted. This effective pressure in the direction of extension acts the pressure in the hydraulic accumulator 8 corresponding Pressure in the annular space 16 counter. To retract the bending cylinder 2, the direction of rotation of the pump assembly 6 over the variable-speed drive 18 reversed, so that Pressure medium from the cylinder chamber 12 via the pump arrangement 6 flows out to the tank. The pressure in the hydraulic accumulator 8 then acts in the retracting direction so that the piston of the Bending cylinder 2 is retracted. At this run-in the pump arrangement 6 acts as a motor, so that accordingly the drive 18, for example an asynchronous motor, as Generator works.
  • the stroke position of the bending cylinder 2 is via a Displacement sensor 20 detects, so that depending on whose signal the control of the drive 18 take place can.
  • bypass line 22 There is a special feature of the solution according to the invention in that the one shown in the figure Embodiment of the memory line 14 and the pressure line 10 connected to one another via a bypass line 22 are. There is an adjustable one in this bypass line Throttle device 24 arranged.
  • the bypass line 22 is also with a pressure relief valve 26 connected to the tank T. Via the pressure relief valve 26 the pressure in the hydraulic accumulator 8 to one predetermined, comparatively low limit set.
  • a check valve 28 is provided which in the direction of Storage line 14 opens.
  • This check valve 28 prevents that when the bending cylinder is retracted 2 Pressure medium from the annular space 16 or from the hydraulic accumulator 8 in the pressure line 10 flows in and thus the hydraulic accumulator 8 is discharged - in this case, the bending cylinder 2 stop or its return movement slowed down.
  • throttle device 24 can in the Bypass line 22 also a flow control valve (not shown) are provided, via which the Storage line 14 inflowing pressure medium volume flow regardless of the pressure difference in the pressure line 10 and is in memory line 14.
  • Another alternative solution may be for certain Applications include throttle 24 and if necessary, the pressure relief valve 26 by a Replace pressure reducing valve. Through this valve the pressure in the storage line 14 (secondary pressure) kept constant, with the valve increasing pressure in the storage line increasingly closes and eventually only leakage losses in the storage line balances.
  • the hydraulic accumulator 8 preceded a safety valve 30.
  • a flow of pressure medium for charging the Hydraulic accumulator 8 branched off from the pressure line 10 so that it is ensured that this is always on the predetermined limit is charged. Since that Pressure relief valve 26 when this limit is reached opens and thus a low pressure medium flow over the Bypass line 22 to tank T arises, the Pump arrangement 6 operated at a slightly higher speed be than this in the solutions according to the invention without Bypass line is the case. Through this speed increase pressure pulsation of the pump is reduced so that a smooth extension movement of the bending cylinder 2 is guaranteed.
  • the large pump 32 is via a low pressure pump line 42 and a switching valve 44 with the pressure line 10 connected.
  • This switching valve 44 opens in its spring-loaded basic position the connection between the low pressure pump line 42 and the pressure line 10.
  • a control surface acting against the force of a spring 46 of the switching valve 44 is via a control line 48 pressurized in the pressure line 10.
  • the switching valve 44 in switched a switching position in which the low pressure pump line 42 is connected to the tank T - the big one Pump 32 is then also switched to pressureless circulation. Similar to the small pump 30, the pressure of the large pump 32 via another pump pressure relief valve 50 limited to a maximum value.
  • the Low-pressure pump line 42 branches another suction line 52 with check valve 54.
  • both pumps 30, 32 from the variable-speed drive 18 driven.
  • the switching valve 44 is in its basic position so that the pressure medium flows both pumps 30, 32 added and via the pressure line 10 are conveyed into the cylinder chamber 12.
  • the Bending cylinder 2 runs with a comparatively high Speed off and builds up in the cylinder chamber 12 appropriate pressure on.
  • the switching valve 44 is in its second switching position switched so that the Low pressure pump line 42 is connected to the tank T. From this threshold pressure, only the small pump delivers 30 pressure medium to the bending cylinder 2nd i.e. to hold the Stroke position of the bending cylinder 2 and to build the Only the smaller pump 30 becomes the maximum pressure used so that at such high pressures on the Pump acting restoring torque is comparatively low and correspondingly the drive 18 with a lower torque can be interpreted.
  • the applicant reserves the right to do the two of one variable speed drive with driven pumps different stroke volumes to the subject of a Make divisional registration.
  • the Bypass line 22 with the associated valve arrangement executed as an independent component. In principle is it is also possible to bypass this 22 in the Integrate hydraulic cylinder 2.
  • a hydraulic drive for one is disclosed Consumer, preferably for a double-acting Cylinder, one of which is a pressure chamber via a pump arrangement can be supplied with pressure medium with variable-speed drive is, while a pressure chamber effective in the opposite direction with the pressure of a hydraulic accumulator is applied.
  • the hydraulic accumulator can be charged via a pressure medium Bypass line and a flow valve or a Pressure reducing valve from that of the pump assembly conveyed pressure medium flow are branched off, so that charging even while the or Consumer is possible.
  • the application discloses furthermore a pump arrangement in which two pumps with different stroke volumes from a common one variable-speed drive are driven, with high pressures on the consumer only with the pump lower displacement is effective, so the drive can be designed with comparatively small torque can.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
EP20030015768 2002-08-02 2003-07-10 Dispositif à actionnement hydraulique Expired - Lifetime EP1387090B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04029899.4A EP1564414B1 (fr) 2002-08-02 2003-07-10 Dispositif de commande hydraulique

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10235631 2002-08-02
DE10235631 2002-08-02
DE10329067 2003-06-27
DE10329067A DE10329067A1 (de) 2002-08-02 2003-06-27 Hydraulischer Antrieb

Related Child Applications (3)

Application Number Title Priority Date Filing Date
EP04029899.4A Division EP1564414B1 (fr) 2002-08-02 2003-07-10 Dispositif de commande hydraulique
EP04029899.4A Division-Into EP1564414B1 (fr) 2002-08-02 2003-07-10 Dispositif de commande hydraulique
EP04029899.4 Division-Into 2004-12-16

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EP1387090A2 true EP1387090A2 (fr) 2004-02-04
EP1387090A3 EP1387090A3 (fr) 2005-06-22
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007031163A1 (fr) * 2005-09-12 2007-03-22 Laeis Gmbh Procede et dispositif de commande d'un systeme piston-cylindre
EP2165878A1 (fr) 2008-09-23 2010-03-24 Interpump Hydraulics S.p.A. Dispositif de distribution pour circuits hydrauliques
WO2011021986A1 (fr) * 2009-08-18 2011-02-24 Demirer Teknolojik Sistemler Sanayi Ticaret Limited Sirketi Économie d’énergie dans des presses hydrauliques à cintrer
WO2012055579A1 (fr) 2010-10-27 2012-05-03 Coskunöz Metal Form Makina Endüstri Ve Tic. A.S. Presse servo-hydraulique
WO2012084093A1 (fr) 2010-12-22 2012-06-28 Robert Bosch Gmbh Mécanisme d'entraînement hydraulique
WO2012112130A1 (fr) 2011-02-16 2012-08-23 Ermaksan Miki̇na Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Presse plieuse à faible bruit et permettant des économies d'énergie
CN104854353A (zh) * 2012-11-22 2015-08-19 Hydac系统有限公司 涡轮机阀调整装置
WO2015185179A1 (fr) * 2014-06-03 2015-12-10 Liebherr-Aerospace Lindenberg Gmbh Unité motopompe à commande électrique
CN105673596A (zh) * 2016-04-05 2016-06-15 广东精铟海洋工程股份有限公司 一种具有自动保压功能的双液压控制系统及其试验方法
CN103261706B (zh) * 2010-12-22 2016-11-30 罗伯特·博世有限公司 液压驱动装置
CN110848181A (zh) * 2019-10-18 2020-02-28 中联重科股份有限公司 液压传动系统和起重机

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DE3233739A1 (de) * 1981-10-01 1983-04-21 Hoerbiger Ventilwerke AG, 1110 Wien Einrichtung zum selbsttaetigen rueckstellen eines stellzylinders
US4633665A (en) * 1983-08-25 1987-01-06 Bueter Josef Double-action piston/cylinder unit
DE3524790A1 (de) * 1985-07-11 1987-01-22 Rexroth Mannesmann Gmbh Digitale volumenstromregelung fuer konstantpumpen
DE9407123U1 (de) * 1994-04-29 1994-07-14 Schwarzwälder Edelputzwerk GmbH, 77833 Ottersweier Vorrichtung zur Geschwindigkeitsregelung hydraulischer Antriebe
US5638676A (en) * 1994-11-07 1997-06-17 Festo Kg Fluid power cylinder
DE19715157A1 (de) * 1997-04-11 1998-10-15 Rexroth Mannesmann Gmbh Hydraulische Anordnung zur Druckmittelversorgung eines Pressenzylinders, insbesondere einer Kakaopresse
DE19750815A1 (de) * 1997-11-17 1999-05-20 Schloemann Siemag Ag Biegevorrichtung für ein Metallband
US6379119B1 (en) * 1995-05-16 2002-04-30 Globemag L-P Hybrid electric and hydraulic actuation system

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Publication number Priority date Publication date Assignee Title
DE3233739A1 (de) * 1981-10-01 1983-04-21 Hoerbiger Ventilwerke AG, 1110 Wien Einrichtung zum selbsttaetigen rueckstellen eines stellzylinders
US4633665A (en) * 1983-08-25 1987-01-06 Bueter Josef Double-action piston/cylinder unit
DE3524790A1 (de) * 1985-07-11 1987-01-22 Rexroth Mannesmann Gmbh Digitale volumenstromregelung fuer konstantpumpen
DE9407123U1 (de) * 1994-04-29 1994-07-14 Schwarzwälder Edelputzwerk GmbH, 77833 Ottersweier Vorrichtung zur Geschwindigkeitsregelung hydraulischer Antriebe
US5638676A (en) * 1994-11-07 1997-06-17 Festo Kg Fluid power cylinder
US6379119B1 (en) * 1995-05-16 2002-04-30 Globemag L-P Hybrid electric and hydraulic actuation system
DE19715157A1 (de) * 1997-04-11 1998-10-15 Rexroth Mannesmann Gmbh Hydraulische Anordnung zur Druckmittelversorgung eines Pressenzylinders, insbesondere einer Kakaopresse
DE19750815A1 (de) * 1997-11-17 1999-05-20 Schloemann Siemag Ag Biegevorrichtung für ein Metallband

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8215108B2 (en) 2005-09-12 2012-07-10 Laeis Gmbh Control apparatus and control method for a piston/cylinder arrangement
JP2009508060A (ja) * 2005-09-12 2009-02-26 ラーイース ゲゼルシャフト ミット ベシュレンクテル ハフツング ピストン・シリンダ機構用の制御装置および制御方法
CN101305189B (zh) * 2005-09-12 2011-01-12 莱斯有限公司 用于活塞/液压缸装置的控制设备和控制方法
EP2280178A1 (fr) * 2005-09-12 2011-02-02 LAEIS GmbH Dispositif et méthode de contôle pour un ensemble piston-cylindre
WO2007031163A1 (fr) * 2005-09-12 2007-03-22 Laeis Gmbh Procede et dispositif de commande d'un systeme piston-cylindre
EP2165878A1 (fr) 2008-09-23 2010-03-24 Interpump Hydraulics S.p.A. Dispositif de distribution pour circuits hydrauliques
ITMO20080243A1 (it) * 2008-09-23 2010-03-24 Interpump Hydraulics Spa Dispositivo di distribuzione per circuiti idraulici.
WO2011021986A1 (fr) * 2009-08-18 2011-02-24 Demirer Teknolojik Sistemler Sanayi Ticaret Limited Sirketi Économie d’énergie dans des presses hydrauliques à cintrer
WO2012055579A1 (fr) 2010-10-27 2012-05-03 Coskunöz Metal Form Makina Endüstri Ve Tic. A.S. Presse servo-hydraulique
WO2012084093A1 (fr) 2010-12-22 2012-06-28 Robert Bosch Gmbh Mécanisme d'entraînement hydraulique
DE102011108285A1 (de) 2010-12-22 2012-06-28 Robert Bosch Gmbh Hydraulischer Antrieb
CN103261706A (zh) * 2010-12-22 2013-08-21 罗伯特·博世有限公司 液压驱动装置
CN103261706B (zh) * 2010-12-22 2016-11-30 罗伯特·博世有限公司 液压驱动装置
WO2012112130A1 (fr) 2011-02-16 2012-08-23 Ermaksan Miki̇na Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Presse plieuse à faible bruit et permettant des économies d'énergie
CN104854353A (zh) * 2012-11-22 2015-08-19 Hydac系统有限公司 涡轮机阀调整装置
WO2015185179A1 (fr) * 2014-06-03 2015-12-10 Liebherr-Aerospace Lindenberg Gmbh Unité motopompe à commande électrique
CN105673596A (zh) * 2016-04-05 2016-06-15 广东精铟海洋工程股份有限公司 一种具有自动保压功能的双液压控制系统及其试验方法
CN105673596B (zh) * 2016-04-05 2017-05-10 广东精铟海洋工程股份有限公司 一种具有自动保压功能的双液压控制系统及其试验方法
CN110848181A (zh) * 2019-10-18 2020-02-28 中联重科股份有限公司 液压传动系统和起重机

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