EP1111247A2 - Système de travail hydraulique avec deux pompes - Google Patents

Système de travail hydraulique avec deux pompes Download PDF

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Publication number
EP1111247A2
EP1111247A2 EP00127327A EP00127327A EP1111247A2 EP 1111247 A2 EP1111247 A2 EP 1111247A2 EP 00127327 A EP00127327 A EP 00127327A EP 00127327 A EP00127327 A EP 00127327A EP 1111247 A2 EP1111247 A2 EP 1111247A2
Authority
EP
European Patent Office
Prior art keywords
oil
control valve
switch
hydraulic system
working hydraulic
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
EP00127327A
Other languages
German (de)
English (en)
Other versions
EP1111247A3 (fr
EP1111247B1 (fr
Inventor
Friedrich Vemmer
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen 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
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP1111247A2 publication Critical patent/EP1111247A2/fr
Publication of EP1111247A3 publication Critical patent/EP1111247A3/fr
Application granted granted Critical
Publication of EP1111247B1 publication Critical patent/EP1111247B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2282—Systems using center bypass type changeover valves
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • 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
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • 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
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open 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
    • F15B2211/32—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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
    • 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
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups

Definitions

  • the invention relates to a working hydraulic system for a tractor with a hoist, various consumers and at least one oil socket for the drive an attachment, and with a constant pump, the pressurized fluid into a neutral circulation line, from which the diverse consumers via control valves and at least one Oil outlet are supplied via a first control valve.
  • this is between the neutral circulation pipe and the oil socket provided first control valve directly by means of an operating element and that between the further neutral circulation line and the Oil control socket provided second control valve electrically operated and switchable by means of a first switch, wherein Sensors on the control unit with a coupling switch are connected, the same switching directions of the two Control valves for the oil outlet ensures (claim 4).
  • This enables the branches to be interconnected via a simple electrical switch. The coupling switch makes sure the two have the oil outlet supplying branches do not work against each other.
  • the first switch is conveniently located on the control element attached so that he serves together with it can be (claim 5). This allows the second branch be switched on without paying attention from the straight work to be carried out if the work from the first Oil quantity supplied to the branch of the oil socket is too small turns out.
  • Fig. 1 In the hydraulic diagram of Fig. 1 is the standard control block with 1 and the additional control block designated with 2. The latter can be used as a custom version retrofitted, as well as with the standard control block 1 be united in a single block.
  • the first standard control block 1 is a (first) constant pump 3 and the another control block another (second) constant pump 4 assigned.
  • a control block 5 for a hoist 6 is only indicated without details as not affected by the invention.
  • the standard control block 1 consists of a first one Connection plate 10 with a pressure relief valve 11, one Valve plate 12 with a mechanical, for example actuated control valve 13 of the type 6/3 or 6/4 (the Floating position is omitted for simplification), as in such hydraulic systems in use, with a connection 14 to a consumer, not shown, further from a valve plate 15 with a mechanical here actuated first control valve 16, also of the type 6/3 for a first parallel oil feed branch 17 to an oil socket 18, furthermore from the entire standard control block 1 continuous neutral circulation line 20, and one to an oil sump 22 open return 21.
  • the additional control block 2 consists of a second Connection plate 30 with a pressure relief valve 31, a valve plate 32 with a second electrically operated one Control valve 33 of type 6/3 for a second parallel Branch 34 for supplying the oil socket 18.
  • the oil socket 18 is thus from the two parallel oil feed branches 17, 34, controlled by the first control valve 16 and fed by the second control valve 33.
  • the second control valve 33 is electrically operated, for which purpose the two control lines 35, 36, each provided for one direction of movement are.
  • the control block 2 also contains a valve plate 37 with a mechanically operated one, for example Control valve of the type 6/3 to a connection 39 for one other consumers.
  • the additional control block 2 is from a second neutral circulation line 40 penetrates and has a further return 41, which also leads to the oil sump 22nd is open.
  • the additional control block 2 is also provided with an end plate 42 in which the neutral circulation line is redirected.
  • Essential and of special interest is the oil outlet 18 with their two in parallel switched oil feed branches 17, 34 and the first control valve 16 and the second control valve 33.
  • the first Control valve 16 is here by means of a connecting rod directly operated by an operating lever 51, the Connection could also be hydraulic.
  • This control lever 51 has a push button on its handle trained first switch 52 and two motion sensors with sensor signal line 53, 54 a the direction of movement of the control lever 51 provide the signal characteristic.
  • Switch 55 is provided, which, designed as a three-position switch, acts on the second control valve 33 (see Fig. 2).
  • Fig.2 shows the electrical actuation of the second Control valves 33 schematically.
  • the second control valve 33 is closed, the oil socket 18 is only on the first oil feed branch 17 and the first control valve 16 controlled by the operating lever 51, supplied. Since the first switch 52 is not actuated is, it is open, all subsequent switches are de-energized.
  • a coupling switch follows the first switch 57, by means of the sensor signals of the signal lines 53, 54 (see Fig. 1) and coils 58, 59 in three different Positions (a, b, c) can be brought.
  • the operating lever 51 is not moved, neither of the two coils 58 59 is live and the coupling switch 57 is in the neutral position b, no current flows to one of the two control coils 60, 61 of the second control valve 33, it remains closed.
  • sensor line 54 provides a signal to the coil 59, whereby the coupling switch in the position a and second control valve 33 in the same position as the first Control valve 16 is brought. Analogously when pressing the Control lever in the other direction.
  • the first switch 52 could also be triggered automatically by an in in various ways conceivable and not shown Sensor must be connected.
  • the second switch (the three-position switch) 55 off Fig. 1 can be found in Fig. 2 again. He is only in the Circuit switched when the coupling switch 57 in is in neutral position B, i.e. when the operating lever 51 is not actuated. Only then can for example Fine adjustment via the second switch 55 the second Control valve 33 are moved. Thanks to this priority circuit it is impossible that the first control valve accidentally 16 in the "lift” position and the second control valve 33 is simultaneously in the "lower" position.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
EP20000127327 1999-12-23 2000-12-13 Système de travail hydraulique avec deux pompes Expired - Lifetime EP1111247B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT89499U AT4093U1 (de) 1999-12-23 1999-12-23 Arbeitshydrauliksystem mit zwei pumpen
AT89499U 1999-12-23

Publications (3)

Publication Number Publication Date
EP1111247A2 true EP1111247A2 (fr) 2001-06-27
EP1111247A3 EP1111247A3 (fr) 2004-01-14
EP1111247B1 EP1111247B1 (fr) 2005-02-23

Family

ID=3502286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000127327 Expired - Lifetime EP1111247B1 (fr) 1999-12-23 2000-12-13 Système de travail hydraulique avec deux pompes

Country Status (3)

Country Link
EP (1) EP1111247B1 (fr)
AT (1) AT4093U1 (fr)
DE (1) DE50009582D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110185671A (zh) * 2019-04-25 2019-08-30 中国北方车辆研究所 一种双泵源并联供油的四足机器人液压动力系统
CN111577684A (zh) * 2020-04-15 2020-08-25 哈尔滨工业大学 一种液压阀性能测试实验系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995831A (en) * 1974-12-17 1976-12-07 The United States Of America As Represented By The Secretary Of The Army Force feedback controlled winch
US4046165A (en) * 1975-06-04 1977-09-06 Ibec Industries, Inc. Valve-positioning apparatus
US4164119A (en) * 1978-03-27 1979-08-14 J. I. Case Company Hydraulic pump unloading system
EP0108347A1 (fr) * 1982-11-01 1984-05-16 Valmet Oy Système hydraulique pour tracteur ou équivalent
US5156065A (en) * 1988-11-11 1992-10-20 Kabushiki Kaisha Kobe Seiko Sho Control lever apparatus and actuator operation apparatus
US5829252A (en) * 1995-09-18 1998-11-03 Hitachi Construction Machinery, Co., Ltd. Hydraulic system having tandem hydraulic function
US5970709A (en) * 1996-09-30 1999-10-26 Kabushiki Kaisha Kobe Seiko Sho Hydraulic control circuit in a hydraulic excavator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995831A (en) * 1974-12-17 1976-12-07 The United States Of America As Represented By The Secretary Of The Army Force feedback controlled winch
US4046165A (en) * 1975-06-04 1977-09-06 Ibec Industries, Inc. Valve-positioning apparatus
US4164119A (en) * 1978-03-27 1979-08-14 J. I. Case Company Hydraulic pump unloading system
EP0108347A1 (fr) * 1982-11-01 1984-05-16 Valmet Oy Système hydraulique pour tracteur ou équivalent
US5156065A (en) * 1988-11-11 1992-10-20 Kabushiki Kaisha Kobe Seiko Sho Control lever apparatus and actuator operation apparatus
US5829252A (en) * 1995-09-18 1998-11-03 Hitachi Construction Machinery, Co., Ltd. Hydraulic system having tandem hydraulic function
US5970709A (en) * 1996-09-30 1999-10-26 Kabushiki Kaisha Kobe Seiko Sho Hydraulic control circuit in a hydraulic excavator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110185671A (zh) * 2019-04-25 2019-08-30 中国北方车辆研究所 一种双泵源并联供油的四足机器人液压动力系统
CN110185671B (zh) * 2019-04-25 2022-06-24 中国北方车辆研究所 一种双泵源并联供油的四足机器人液压动力系统
CN111577684A (zh) * 2020-04-15 2020-08-25 哈尔滨工业大学 一种液压阀性能测试实验系统

Also Published As

Publication number Publication date
EP1111247A3 (fr) 2004-01-14
DE50009582D1 (de) 2005-03-31
EP1111247B1 (fr) 2005-02-23
AT4093U1 (de) 2001-01-25

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