EP0823559A2 - Dispositif de commande hydraulique - Google Patents

Dispositif de commande hydraulique Download PDF

Info

Publication number
EP0823559A2
EP0823559A2 EP97112410A EP97112410A EP0823559A2 EP 0823559 A2 EP0823559 A2 EP 0823559A2 EP 97112410 A EP97112410 A EP 97112410A EP 97112410 A EP97112410 A EP 97112410A EP 0823559 A2 EP0823559 A2 EP 0823559A2
Authority
EP
European Patent Office
Prior art keywords
valve
proportional throttle
control
throttle valve
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
EP97112410A
Other languages
German (de)
English (en)
Other versions
EP0823559A3 (fr
EP0823559B1 (fr
Inventor
Heinrich Loedige
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 EP0823559A2 publication Critical patent/EP0823559A2/fr
Publication of EP0823559A3 publication Critical patent/EP0823559A3/fr
Application granted granted Critical
Publication of EP0823559B1 publication Critical patent/EP0823559B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003—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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
    • 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
    • F15B2211/30—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
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F15B2211/3053—In combination with a pressure compensating valve
    • F15B2211/3054—In combination with a pressure compensating valve the pressure compensating valve is arranged between directional control valve and 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
    • F15B2211/31—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
    • F15B2211/31523—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
    • F15B2211/31529—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member 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
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant 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
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/41—Flow control characterised by the positions of the valve element
    • F15B2211/411—Flow control characterised by the positions of the valve element the positions being discrete
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the 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
    • F15B2211/50—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
    • F15B2211/51—Pressure control characterised by the positions of the valve element
    • F15B2211/513—Pressure control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/57—Control of a differential 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief valves
    • 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
    • F15B2211/6346—Electronic controllers using input signals representing a state of input means, e.g. joystick position
    • 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
    • F15B2211/65—Methods of control of the load sensing pressure
    • F15B2211/652—Methods of control of the load sensing pressure the load sensing pressure being different from the load 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
    • F15B2211/70—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
    • F15B2211/7052—Single-acting output members

Definitions

  • the invention is based on a hydraulic Control device according to the preamble of claim 1 specified genus.
  • Such a hydraulic control device is already out DE 44 46 145 A1 known for controlling a single-acting Motor serves and for lifting and lowering the load has two proportional throttle valves that act as two-way valves are trained, electromagnetically controlled and are structurally separate from each other.
  • a additional pressure compensator ensures a load-compensated Volume flow control when lifting. Although one Load compensation when lifting in many applications such a load pressure compensated control is sufficient in some cases also desirable when lowering, which is the case with previously known control device is not possible. Since the Control device to safely shut off the simple Acting load should be particularly tight, are seat valves used to shut off the motor connection.
  • the pressure compensator is here upstream of the Proportional throttle valve switched, being optional is designed as a two-way or four-way valve. The The load is lowered depending on the load pressure.
  • DE 34 22 978 is a hydraulic one Control device known in the in a working line between a proportional valve and a motor Pressure compensator is switched.
  • the hydraulic motor is here trained as a double-acting consumer and accordingly the one used for control Proportional valve designed as a four-way valve that for the load pressure feedback additional control connections having.
  • the pressure compensator here in the inlet flow and once in the drain current, is to switch to the Pressure compensator acting pressure difference a magnetic Actuable 4/2 switching valve provided, which depends on actuation of the proportional valve got to.
  • This control device is not suitable for one Circuit with 2-way proportional throttle valves; is also the effort for the control circuit of the pressure compensator is relatively high.
  • This control device also does not use seat valves in the working line influenced by the pressure compensator, so that it is not easy to shut off a leak acting load is suitable.
  • the hydraulic control device according to the invention with the characteristic features of claim 1 has in contrast the advantage that they can be low-leakage design a pressure-compensated Volume flow control also possible with sinks, so that now a load pressure independent control of the engine in its is possible in both directions.
  • the advantages of building with Two-way proportional valves remain unchanged maintained. While in the working group itself no additional effort is required, it is only relatively simple, space-saving and cost-effective changes in the control circuit the control device.
  • the figure shows a in a simplified representation hydraulic control device 10 for load-compensated Volume flow control for a hydraulic motor 11, the is designed as a single-acting cylinder, like in hoists for lifting, holding and lowering loads, is used in particular in forklifts or tractors.
  • the control device 10 here has a valve block 12 on the between a connecting plate 13 and one additional valve block 14 is flanged and that of one continuous pump channel 15 and a continuous Return channel 16 is penetrated.
  • these Pump channel 15 outgoing and to a motor connection 17th leading inlet line 18 are a first one after the other Proportional throttle valve 19, a motor 11 securing Check valve 21 and a pressure compensator 22 switched.
  • one of the return channel 16 to Motor connection 17 leading drain line 23 a second Proportional throttle valve 24 switched that as a seat valve is executed.
  • the inlet line 18 and the return line 23 form in the area between the motor connection 17 and one Branch 25 a common line section 26 in which the pressure compensator 22 is located.
  • the check valve 21 is in the feed line 18 upstream of the branch 25.
  • Both proportional throttle valves 19, 24 are related to their working flows run as two-way valves that each work proportionally and operated electromagnetically what their proportional magnets from one electronic control unit 27 can be controlled. Accordingly, the proportional throttle valves 19, 24 each have two working connections P, A, of which in the P position is blocked in the respective starting position.
  • the first proportional throttle valve 19 has a first one Control connection 28 with a first control line 31 the non-spring-loaded end face of the pressure compensator 22 in Connection is established.
  • a second control line 32 also leads from the working port A of the first proportional valve 19 to that end face of the pressure compensator 22, which by a Control spring 33 is loaded.
  • a shuttle valve 34 is also connected, which via a third control line 35 with the working connection P of the second proportional throttle valve 24 is connected.
  • the shuttle valve 34 is arranged in the control circuit and switched that it was the higher pressure in the first Control port 28 or in the working port P of the second Proportional throttle valve 24 selects and to the pressure compensator 22 forwards.
  • the first Proportional throttle valve 19 In the shown starting position 29 of the first proportional throttle valve 19 is its first Control connection 28 via a fourth control line 40 to Return channel 16 relieved, this relief via a Cross connection 30 in the control element of the first Proportional throttle valve 19 also for the working connection A is effective.
  • the control link of the first Proportional throttle valve 19 is from his Proportional magnets against the force of a spring from the Starting position 29 adjustable in working positions 36, a measuring choke 37 proportional to the size of the electrical input signal is controllable. In the Working positions 36, the pressure upstream of the Measuring throttle 37 always led to the first control connection 28.
  • the second Proportional throttle valve 24 Like the simplified representation of the second Proportional throttle valve 24 shows, it is despite its proportional mode of operation as a throttle valve too designed as a seat valve so that it is in its Starting position 38 the motor 11 safely hydraulically cordoned off. In the working positions 39 is accordingly Function as a proportional throttle valve the measuring throttle more or stepped up less.
  • a control slide 41 arranged in the pressure compensator 22 becomes from the control spring 33 in the direction of a connection in Line section 26 opening position 42 pressed while moving from a pressure differential against the Force of the control spring 33 in the direction of a blocking position 43 is deflectable.
  • the pressure in the feed line 18 in the area between the first Proportional throttle valve 19 and check valve 21 is tapped from a fifth control line 44 and to one second shuttle valve 45, which in a control circuit 46 is switched for a system pressure compensator 47.
  • a system pressure compensator 47 lies the system pressure compensator 47 in a bypass 48 between that of a pump 49 supplied with pressure medium pump channel 15 and the return duct 16.
  • control device 10 The operation of the control device 10 is as follows explained, the basic function of such Proportional throttle valves 19, 24 as known per se is assumed.
  • the first Proportional throttle valve 19 To lift the motor 11 is the first Proportional throttle valve 19 in the direction of it Working position 36 deflected so that the pump channel 15th a volume flow through the inlet line 18, the first Proportional throttle valve 19, the check valve 21 and the pressure compensator 22 flows to the motor 11.
  • the first Proportional throttle valve 19 arises at the Measuring throttle 37 a pressure drop, the pressure tapped upstream of the measuring throttle 37 and over the first control connection 28, the first control line 31 with the Shuttle valve 34 to the springless end face of the pressure compensator 22 is conducted while the pressure downstream of the Measuring choke 37 via the second control line 32 to the of the end of the pressure compensator 22 acted upon by the control spring 33 works.
  • the Pressure compensator 22 the pressure drop at the measuring throttle 37 constant, so that a load-compensated when lifting Volume flow control to the engine 11 is achieved, the Measuring throttle 37 with the pressure compensator 22 a two-way flow controller forms.
  • the control unit 27 uses the Proportional solenoid on the second proportional throttle valve 24 controlled, whereby its control member against the force of Spring is deflected into the working position 39.
  • the on Working port P existing load pressure of the engine 11 is tapped from the third control line 35 and via the Shuttle valve 34 and part of the first control line 31 led to the springless end face of the pressure compensator 22.
  • the end face of the pressure compensator 22 loaded by the control spring 33 is via the second control line 32, the in Starting position 29 located first Proportional throttle valve 19 and the fourth control line 40 with the working connection A of the second Proportional throttle valve 24 connected and thus to Return channel 16 relieved.
  • the pressure compensator 22 is now upstream of the second proportional throttle valve 24 in switched the volume flow, being known in itself Way the pressure drop across the orifice in the second Proportional throttle valve 24 keeps constant. Thus, too load-compensated volume flow control when lowering reached.
  • the pump 49 conveyed volume flow either via the system pressure compensator 47 and the bypass 48 returned to the tank 52 are not closer or if necessary to supply one drawn additional motor via the pump channel 15 be led to this consumer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
EP97112410A 1996-08-09 1997-07-19 Dispositif de commande hydraulique Expired - Lifetime EP0823559B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19632201 1996-08-09
DE19632201A DE19632201A1 (de) 1996-08-09 1996-08-09 Hydraulische Steuereinrichtung

Publications (3)

Publication Number Publication Date
EP0823559A2 true EP0823559A2 (fr) 1998-02-11
EP0823559A3 EP0823559A3 (fr) 1998-07-15
EP0823559B1 EP0823559B1 (fr) 2001-10-31

Family

ID=7802252

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97112410A Expired - Lifetime EP0823559B1 (fr) 1996-08-09 1997-07-19 Dispositif de commande hydraulique

Country Status (2)

Country Link
EP (1) EP0823559B1 (fr)
DE (2) DE19632201A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0965763A1 (fr) 1998-06-17 1999-12-22 HEILMEIER & WEINLEIN Fabrik für Oel-Hydraulik GmbH & Co. KG Dispositif de commande hydraulique
EP0987444A3 (fr) * 1998-09-18 2002-07-31 HydraForce, Inc. Régulateur de flux proportional et prioritaire avec régulation de contreflux
WO2005093164A1 (fr) * 2004-03-17 2005-10-06 Hydac System Gmbh Dispositif pour piloter et actionner un mecanisme a vibrations
CN102979774A (zh) * 2012-05-24 2013-03-20 山东弘宇机械有限公司 一种拖拉机液压悬挂专用控制阀块
CN105035979A (zh) * 2015-08-05 2015-11-11 常德中联重科液压有限公司 平衡阀组和液压系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10023583B4 (de) * 2000-05-13 2012-05-24 Robert Bosch Gmbh Elektrohydraulischer Senken-Modul
US6457487B1 (en) * 2001-05-02 2002-10-01 Husco International, Inc. Hydraulic system with three electrohydraulic valves for controlling fluid flow to a load

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422978A1 (de) 1984-06-22 1986-01-02 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur steuerung einer hydraulischen stelleinrichtung
DE4446145A1 (de) 1994-12-23 1996-06-27 Bosch Gmbh Robert Hydraulische Steuerung in Monoblockbauweise zum Heben und Senken einer Last mit mindestens zwei elektromagnetisch betätigbaren Proportionalwegeventilelementen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3844400C2 (de) * 1988-12-30 1993-12-02 Rexroth Mannesmann Gmbh Ventilanordnung für ein hydraulisches System
DE4307872C2 (de) * 1993-03-12 2001-05-17 Orenstein & Koppel Ag Lastdruckunabhängige Steuerung der Geschwindigkeit von hydraulischen Stellelementen
DE9405872U1 (de) * 1994-04-08 1994-05-26 Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 81673 München Senkbremsventil und Mengenregel-Vorrichtung für die Hochdruck-Hydraulik

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422978A1 (de) 1984-06-22 1986-01-02 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur steuerung einer hydraulischen stelleinrichtung
DE4446145A1 (de) 1994-12-23 1996-06-27 Bosch Gmbh Robert Hydraulische Steuerung in Monoblockbauweise zum Heben und Senken einer Last mit mindestens zwei elektromagnetisch betätigbaren Proportionalwegeventilelementen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0965763A1 (fr) 1998-06-17 1999-12-22 HEILMEIER & WEINLEIN Fabrik für Oel-Hydraulik GmbH & Co. KG Dispositif de commande hydraulique
US6176261B1 (en) 1998-06-17 2001-01-23 Heilmeier & Weinlein Fabrik F. Oel-Hydraulik Gmbh & Co. Kg Hydraulic control device
EP0987444A3 (fr) * 1998-09-18 2002-07-31 HydraForce, Inc. Régulateur de flux proportional et prioritaire avec régulation de contreflux
WO2005093164A1 (fr) * 2004-03-17 2005-10-06 Hydac System Gmbh Dispositif pour piloter et actionner un mecanisme a vibrations
CN102979774A (zh) * 2012-05-24 2013-03-20 山东弘宇机械有限公司 一种拖拉机液压悬挂专用控制阀块
CN102979774B (zh) * 2012-05-24 2015-05-06 山东弘宇农机股份有限公司 一种拖拉机液压悬挂专用控制阀块
CN105035979A (zh) * 2015-08-05 2015-11-11 常德中联重科液压有限公司 平衡阀组和液压系统

Also Published As

Publication number Publication date
DE19632201A1 (de) 1998-02-12
DE59705151D1 (de) 2001-12-06
EP0823559A3 (fr) 1998-07-15
EP0823559B1 (fr) 2001-10-31

Similar Documents

Publication Publication Date Title
DE102004050294B3 (de) Hydraulische Ventilanordnung
EP0016719B1 (fr) Dispositif de commande pour moteur hydraulique
DE4140409A1 (de) Elektrohydraulische steuereinrichtung
DE102012203386A1 (de) Steueranordnung
DE102005011395A1 (de) Hydraulische Steueranordnung
DE102008064064A1 (de) Hydraulische Steueranordnung
DE102004025322A1 (de) Hydraulische Ventilanordnung
EP2157320B1 (fr) Commande hydraulique pour un moteur hydraulique
EP0823559B1 (fr) Dispositif de commande hydraulique
EP0115590B1 (fr) Dispositif de commande hydraulique
DE19709958B4 (de) Hydrostatisches Antriebssystem
EP2466154B1 (fr) Dispositif de commande hydroélectrique
DE19646427B4 (de) Ventilanordnung
DE102007014550A1 (de) Ventilanordnung
EP0057355B1 (fr) Dispositif de levage hydraulique
EP2157319B1 (fr) Commande hydraulique pour un moteur hydraulique
EP1574720B1 (fr) Commande électro-hydraulique et méthode de sa déactivation
EP1253327B1 (fr) Circuit de commande hydraulique
DE10119276B4 (de) Hydraulischer Steuerkreis
DE10114042B4 (de) Hydraulikanlage für zwei Konstantpumpen
DE4026849C2 (de) Ventilanordnung zum Erzeugen eines Steuerdrucks in einer hydraulischen Anlage
DE102008064138A1 (de) Hydraulische Steueranordnung
DE3938560A1 (de) Hydraulische steuereinrichtung
EP1729014B1 (fr) Bloc de commande et section de bloc de commande
DE3139635A1 (de) Hydraulische steuereinrichtung mit mindestens zwei wegeventilen zur steuerung hydraulischer verbraucher

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

RHK1 Main classification (correction)

Ipc: F15B 11/05

17P Request for examination filed

Effective date: 19990115

AKX Designation fees paid

Free format text: DE FR GB IT

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20000904

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 59705151

Country of ref document: DE

Date of ref document: 20011206

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20020124

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040720

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060331

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060331

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20100729

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20100726

Year of fee payment: 14

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20110719

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110719

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110719

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20120927

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59705151

Country of ref document: DE

Effective date: 20140201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140201