EP1111247B1 - Système de travail hydraulique avec deux pompes - Google Patents

Système de travail hydraulique avec deux pompes Download PDF

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Publication number
EP1111247B1
EP1111247B1 EP20000127327 EP00127327A EP1111247B1 EP 1111247 B1 EP1111247 B1 EP 1111247B1 EP 20000127327 EP20000127327 EP 20000127327 EP 00127327 A EP00127327 A EP 00127327A EP 1111247 B1 EP1111247 B1 EP 1111247B1
Authority
EP
European Patent Office
Prior art keywords
oil
control valve
power system
switch
hydraulic power
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.)
Expired - Lifetime
Application number
EP20000127327
Other languages
German (de)
English (en)
Other versions
EP1111247A3 (fr
EP1111247A2 (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
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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 farm tractor with a hoist, according to the generic term of claim 1.
  • this is between the neutral circulation and the oil socket provided first control valve directly by means of an operating element and that between the other neutral circulation line and the Oil 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 socket ensures (claim 4).
  • This allows interconnecting the branches via a simple electrical switch.
  • the coupling switch Make sure the two are the oil outlet supplying branches do not work against each other.
  • the first switch on the control element attached so that he served together with this can be (claim 5).
  • the second control valve by means of a second switch controllable be when the actuator for the first control valve is not actuated (claim 6). So can the second Branch alone to preselect the position or movement used the supplied via the oil socket attachment become. To prevent incorrect operation, the Coupling switch only the connection between the second Switch and the second control valve ago, when in Neutral position is located (claim 7). It will be an advantage provided as a second switch, a three-position switch (Claim 8). That allows a simple and good adjustable fine control.
  • Fig. 1 In the hydraulic diagram of Fig. 1 is the standard control block with 1 and the additional additional control block denoted by 2. The latter can be both as a WunschausScienceuiig retrofitted, as well as with the standard control block 1 be united into a single block.
  • the first standard control block 1 is a (first) constant displacement pump 3 and the another control block another (second) Constantpumpe 4th assigned.
  • a control block 5 for a hoist 6 is only indicated without details, since not affected by the invention.
  • the standard control block 1 consists of a first Connection plate 10 with a pressure relief valve 11, a Valve plate 12 with an example, mechanically operated control valve 13 of the type 6/3 or 6/4 (the Floating position is omitted for simplicity), as in Such hydraulic systems in use, with a connection 14 to a consumer, not shown, further from a valve plate 15 with a here mechanically actuated first control valve 16, also of type 6/3 for a first parallel oil feed branch 17 to an oil outlet 18, further from one the entire standard control block 1 passing through neutral circulation line 20, and a to an oil sump 22 open return 21st
  • 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 Control valve 33 type 6/3 for a second parallel Branch 34 for the supply of the oil socket 18.
  • the oil socket 18 is thus of the two parallel oil supply 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, including the two control lines 35, 36, each for a direction of movement provided are.
  • the control block 2 still contains a valve plate 37 with an example mechanically operated Control valve type 6/3 to a terminal 39 for a other consumers.
  • the additional control block 2 is from a second neutral circulation line 40 passes through and has another return 41, which also 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 diverted.
  • Essential and of special interest is the oil outlet 18 with their two in parallel switched oil supply 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 operated directly by an operating lever 51, wherein the Connection could also be hydraulic.
  • This operating lever 51 has on its handle a push-button formed first switch 52 and two motion sensors with sensor signal line 53, 54 which one the direction of movement provide the signal indicative of the operating lever 51.
  • a second 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 valve 33 schematically.
  • the second control valve 33 In the picturedii position the second control valve 33 is closed, the oil outlet 18 is only on the first oil inlet 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.
  • the first switch is followed by a coupling 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.
  • sensor line 54 provides a signal to the coil 59, whereby the coupling switch in the position a and the second control valve 33 in the same position as the first Control valve 16 is brought. Analogous to the actuation of the Operating lever in the other direction.
  • the first switch 52 could also be triggered automatically by an in various ways conceivable and not shown Sensor be connected.
  • the second switch (the three-position switch) 55 off Fig. 1 is found in Fig. 2 again. He is only in the Circuit switched when the coupling switch 57 in the neutral position B is located, so if the operating lever 51 is not actuated. Only then, for example, to Fine adjustment via the second switch 55, the second Control valve 33 are moved. Thanks to this priority circuit it is impossible to accidentally use the first control valve 16 in the "raise” position and the second control valve 33 is simultaneously in the "lower" position.

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  • 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)

Claims (9)

  1. Système hydraulique pour un tracteur agricole avec un système de levage, différents consommateurs et au moins une prise d'huile (18) pour l'entraínement d'un appareil agricole, et avec une pompe à cylindrée constante (3) qui refoule un fluide sous pression vers un circuit neutre (20) qui alimente les différents consommateurs par l'intermédiaire de soupapes de commande et la prise d'huile (18) par l'intermédiaire d'une première soupape de commande (16), et avec une autre pompe à cylindrée constante (4) qui, par un circuit neutre (40) supplémentaire, alimente également la prise d'huile (18) en fluide sous pression par l'intermédiaire d'une deuxième soupape de commande (33), les soupapes de commande (16, 33) pouvant être commutées indépendamment l'une de l'autre dans les embranchements parallèles d'entrée d'huile (17, 34) qui conduisent à la prise d'huile (18), caractérisé en ce que les soupapes de commande (16, 33) peuvent être commutées de telle sorte que la prise d'huile (18) soit alimentée alternativement par l'un ou l'autre circuit neutre (20, 40), soit par les deux circuits neutres (20, 40), un commutateur de couplage garantissant que les deux embranchements (17, 34) alimentant la prise d'huile ne fonctionnent pas de manière opposée l'un par rapport à l'autre grâce au fait que les soupapes de commande (16, 33) ont la même direction de commutation pour la prise d'huile (18).
  2. Système hydraulique selon la revendication 1, caractérisé en ce que les deux pompes à cylindrée constante (3, 4) ont des capacités de refoulement différentes.
  3. Système hydraulique selon la revendication 1, dans lequel les différents consommateurs (14, 18, 39) sont branchés en série aux circuits neutres (20, 40), caractérisé en ce que au moins une des deux soupapes de commande (16, 33) est disposée pour la prise d'huile (18) dans son circuit neutre (20; 40) à la première place après la pompe (3, 4).
  4. Système hydraulique selon la revendication 1, caractérisé en ce que la première soupape de commande (16), disposée entre le circuit neutre (20) et la prise d'huile (18), est actionnée directement à l'aide d'un organe d'actionnement (51) et la deuxième soupape de commande (33), disposée entre le circuit neutre (40) et la prise d'huile (18), est actionnée de manière électrique et peut être commutée à l'aide d'un premier interrupteur (52), des conduites de capteurs (53, 54) étant reliées à l'interrupteur de couplage (57) par l'intermédiaire de l'organe d'actionnement (51).
  5. Système hydraulique selon la revendication 4, caractérisé en ce que le premier interrupteur (52) est disposé sur l'organe d'actionnement (51), de telle sorte qu'il puisse être utilisé en même temps que celui-ci.
  6. Système hydraulique selon la revendication 4, caractérisé en ce que la deuxième soupape de commande (33) peut être commandée à l'aide d'un deuxième interrupteur (55) lorsque l'organe d'actionnement (51) pour la première soupape de commande (16) n'est pas actionné.
  7. Système hydraulique selon la revendication 4, caractérisé en ce que l'interrupteur de couplage (57) peut être amené dans trois positions différentes, l'interrupteur de couplage (57) dans la position neutre ne commandant pas la deuxième soupape de commande (33), cette-ci restant donc fermée.
  8. Système hydraulique selon la revendication 7, caractérisé en ce que le deuxième interrupteur (55) est un interrupteur à trois positions.
  9. Système hydraulique selon la revendication 3, caractérisé en ce que la deuxième soupape de commande (33) est ouverte automatiquement lorsqu'un débit d'huile plus important est nécessaire dans la prise d'huile.
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 1999-12-23
AT89499U AT4093U1 (de) 1999-12-23 1999-12-23 Arbeitshydrauliksystem mit zwei pumpen

Publications (3)

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

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Family Applications (1)

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EP20000127327 Expired - Lifetime EP1111247B1 (fr) 1999-12-23 2000-12-13 Système de travail hydraulique avec deux pompes

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN111577684B (zh) * 2020-04-15 2022-01-07 哈尔滨工业大学 一种液压阀性能测试实验系统

Family Cites Families (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
FI823729L (fi) * 1982-11-01 1984-05-02 Valmet Oy Hydrauliksystem foer en traktor eller liknande
US5156065A (en) * 1988-11-11 1992-10-20 Kabushiki Kaisha Kobe Seiko Sho Control lever apparatus and actuator operation apparatus
JP3511425B2 (ja) * 1995-09-18 2004-03-29 日立建機株式会社 油圧システム
JP3550260B2 (ja) * 1996-09-30 2004-08-04 コベルコ建機株式会社 アクチュエータ作動特性制御装置

Also Published As

Publication number Publication date
EP1111247A3 (fr) 2004-01-14
EP1111247A2 (fr) 2001-06-27
DE50009582D1 (de) 2005-03-31
AT4093U1 (de) 2001-01-25

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