EP0205925A2 - Dispositif de commande pour machine hydraulique de travail - Google Patents

Dispositif de commande pour machine hydraulique de travail Download PDF

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Publication number
EP0205925A2
EP0205925A2 EP86106864A EP86106864A EP0205925A2 EP 0205925 A2 EP0205925 A2 EP 0205925A2 EP 86106864 A EP86106864 A EP 86106864A EP 86106864 A EP86106864 A EP 86106864A EP 0205925 A2 EP0205925 A2 EP 0205925A2
Authority
EP
European Patent Office
Prior art keywords
pump
valve
control valve
electrically actuated
setpoint
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
EP86106864A
Other languages
German (de)
English (en)
Other versions
EP0205925B1 (fr
EP0205925A3 (en
Inventor
Erich Dipl.-Ing. Eckhardt
Gerhard Dipl.-Ing. Nonnenmacher
Roman Ing. Romes
Franz Dipl.-Ing.(Fh) Schwede
Dieter Dipl.-Ing. Weigle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0205925A2 publication Critical patent/EP0205925A2/fr
Publication of EP0205925A3 publication Critical patent/EP0205925A3/de
Application granted granted Critical
Publication of EP0205925B1 publication Critical patent/EP0205925B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/087—Control strategy, e.g. with block diagram

Definitions

  • the invention relates to a control device for hydraulic machines according to the preamble of the main claim.
  • Such machines are usually controlled with the aid of directional control valves which, in addition to the neutral position and the maximum working position, have a fine control range in which only a part of the pump delivery flow is directed to the consumer (working cylinder, hydraulic motor).
  • the pump can be designed as a constant pump or variable pump. In such hydraulic circuits, throttling losses inevitably occur in the neutral position (circulating pressure at maximum flow) and in the fine control range (outflow of unused hydraulic fluid), which worsens the energy balance of the system.
  • control device with the characterizing features of the main claim has the advantage that it is very simple and allows to work with the least losses, d. that is, always adjust the pump so that it only provides the flow required by the consumers.
  • 10 is an adjustable pump which draws pressure medium from a container and displaces it into a delivery line 12.
  • the delivery line leads to a 4/3-way valve 13 with proportional behavior, which can be actuated by electromagnets 14, 15.
  • Two lines 16, 17 lead from the directional control valve to the pressure chambers 18, 19 of a double-acting working cylinder 20.
  • the actuator 22 of the adjustable pump 10 is actuated by two actuating pistons 23, 24 pressurized by pressure medium, of which the one with the smaller diameter 24 is pressurized via a line 25 connected to the delivery line.
  • a line 26 leads from the larger area piston 23 to a 3/3-way valve 27 with proportional behavior; it is actuated by an electromagnet 28 against the force of a control spring 21, which is supported on the actuating piston 23.
  • a line 30 leads from the directional control valve 27 to the delivery line 12 on the one hand, and a line 31 to the container 11 on the other hand.
  • the control of the directional control valves 13, 27 takes place via an adjusting device 32 designed as a setpoint device with an actuating lever 32 ', the angular position of which is converted into a proportional electrical signal, e.g. B. by a setpoint transmitter 33 designed as a rotary potentiometer.
  • the setpoint signals of the electrical setpoint generator thus formed lead via two lines 35, 36 to the electromagnets 14, 15 of the directional control valve 13, and from a summing point 38 and its amplifier 44 a line 39 leads to the electromagnet 28 of the directional control valve 27.
  • the control lever 32 'of the setpoint generator can be pivoted to both sides (-a; + ct) - and generates and sends corresponding setpoint signals to the directional control valves.
  • power amplifiers 42, 43 are arranged which supply the magnetic current.
  • the pump 10 is driven by an internal combustion engine 48.
  • the electrical setpoint generator 33 in addition to the position signal for the directional control valve 13, a position signal for the directional control valve 27 and thus for the pump 10 is obtained, which in this exemplary embodiment is designed such that the adjustment of the pump is proportional to the adjustment of the directional control valve 13.
  • the setpoint for the pump delivery rate and the actuation of the working cylinder 20 is predetermined via the setting lever 32 for the electrical setpoint generator 33.
  • an additional summing point 50 with amplifier 50 ' is also provided in line 39, to which a signal is supplied which causes the Adjustment of the pump relative to the adjustment of the directional control valve 13 has an approximately constant flow, ie the pump is adjusted earlier than the directional control valve 13.
  • the speed of the internal combustion engine 48 is also included in the control circuit.
  • An electronic divider 52 is inserted into line 39, and the speed of the internal combustion engine is entered via line 53 as a divisor.
  • the power amplifier 45 which supplies the magnetic current, is located in line 39 behind the divider.
  • Figure 4 follows that of Figure 1, but with the difference that here a second cylinder 55 with associated 4/3-way proportional valve 56 is provided, and a second actuator 57 with lever 57 'and elec trical Setpoint generator 58. Details are - so far not readily understandable - only taken into account insofar as a line 59 leads from the actuating device 57 to a second summing point 60 of the line 39, so that also from the actuation of the second consumer 55 Signal is given to the directional control valve 27, whereby the pump flow is increased according to this additional need.
  • a combination of the last-mentioned exemplary embodiment with that according to FIG. 3 represents the exemplary embodiment according to FIG. 5, where the internal combustion engine 48 is again included in the control circuit. Their load state is compared in an electronic control unit with a target value for the maximum load. Two lines 63, 64 lead from the control device 62 to electrical limiters 65 and 66, which can reduce the setpoint signals of the actuating devices 32, 57. When a predetermined limit is reached, e.g. B. the power limit of the internal combustion engine, the setpoints for the adjustment of the directional control valves are reduced according to a preprogrammed priority plan. The pump 10 is then reset as in the case of the previous exemplary embodiments.
  • a predetermined limit e.g. B. the power limit of the internal combustion engine
  • the device according to the invention also has the advantage that an energy saving is achieved with conventional directional valves, which otherwise can only be achieved with load-sensing technology. Furthermore, the device according to the invention also offers intervention options for higher-level signals that far exceed previously known limit load regulations or power regulations. As can be seen from the above, the device makes use of the consideration of electrically adjusting the control valves to avoid long rods and hydraulic lines; the same applies to the pump.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Valve Device For Special Equipments (AREA)
EP19860106864 1985-06-19 1986-05-21 Dispositif de commande pour machine hydraulique de travail Expired - Lifetime EP0205925B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853521815 DE3521815A1 (de) 1985-06-19 1985-06-19 Steuereinrichtung fuer hydraulische arbeitsmaschinen
DE3521815 1985-06-19

Publications (3)

Publication Number Publication Date
EP0205925A2 true EP0205925A2 (fr) 1986-12-30
EP0205925A3 EP0205925A3 (en) 1989-03-22
EP0205925B1 EP0205925B1 (fr) 1992-02-05

Family

ID=6273575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860106864 Expired - Lifetime EP0205925B1 (fr) 1985-06-19 1986-05-21 Dispositif de commande pour machine hydraulique de travail

Country Status (2)

Country Link
EP (1) EP0205925B1 (fr)
DE (2) DE3521815A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648584A1 (fr) * 1989-06-16 1990-12-21 Rexroth Sigma Procede et systeme de regulation du courant moyen traversant une charge, et dispositif de telecommande electrique du type manipulateur en faisant application
FR2650635A1 (fr) * 1989-08-07 1991-02-08 Rexroth Sigma Procede de commande d'au moins une pompe a debit variable dans une installation electrohydraulique, et installation electrohydraulique mettant en oeuvre ce procede
EP0531746A1 (fr) * 1991-09-07 1993-03-17 KIWA MASCHINENFABRIK GmbH Procédé et installation de mise en circuit pour commander en particulier une installation de grue
DE19545657A1 (de) * 1995-12-07 1997-06-12 Rexroth Mannesmann Gmbh Hydraulische Ventilanordnung mit einem druckgesteuerten Wegeventil

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107917117A (zh) * 2016-10-11 2018-04-17 张利 一种机液伺服缸

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1807171A1 (de) * 1968-11-06 1970-06-18 Bosch Gmbh Robert Einrichtung zur elektrohydraulischen Fernsteuerung hydraulischer Wegeventile
GB1385099A (en) * 1972-08-25 1975-02-26 Coventry Climax Eng Ltd Industrial fork lift truck
EP0022104A2 (fr) * 1979-06-15 1981-01-07 Akermans Verkstad AB Système de réglage pour limitation de puissance d'un système hydraulique à servomoteurs
JPS5899501A (ja) * 1981-12-03 1983-06-13 Ishikawajima Harima Heavy Ind Co Ltd 油圧ポンプ制御回路

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1807171A1 (de) * 1968-11-06 1970-06-18 Bosch Gmbh Robert Einrichtung zur elektrohydraulischen Fernsteuerung hydraulischer Wegeventile
GB1385099A (en) * 1972-08-25 1975-02-26 Coventry Climax Eng Ltd Industrial fork lift truck
EP0022104A2 (fr) * 1979-06-15 1981-01-07 Akermans Verkstad AB Système de réglage pour limitation de puissance d'un système hydraulique à servomoteurs
JPS5899501A (ja) * 1981-12-03 1983-06-13 Ishikawajima Harima Heavy Ind Co Ltd 油圧ポンプ制御回路

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 199 (M-240)[1344], 3. September 1983; & JP-A-58 099 501 (ISHIKAWAJIMA HARIMA JUKOGYO K.K.) 13-06-1983 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648584A1 (fr) * 1989-06-16 1990-12-21 Rexroth Sigma Procede et systeme de regulation du courant moyen traversant une charge, et dispositif de telecommande electrique du type manipulateur en faisant application
FR2650635A1 (fr) * 1989-08-07 1991-02-08 Rexroth Sigma Procede de commande d'au moins une pompe a debit variable dans une installation electrohydraulique, et installation electrohydraulique mettant en oeuvre ce procede
EP0531746A1 (fr) * 1991-09-07 1993-03-17 KIWA MASCHINENFABRIK GmbH Procédé et installation de mise en circuit pour commander en particulier une installation de grue
DE19545657A1 (de) * 1995-12-07 1997-06-12 Rexroth Mannesmann Gmbh Hydraulische Ventilanordnung mit einem druckgesteuerten Wegeventil

Also Published As

Publication number Publication date
DE3521815A1 (de) 1987-01-02
EP0205925B1 (fr) 1992-02-05
DE3683805D1 (de) 1992-03-19
EP0205925A3 (en) 1989-03-22

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