EP1252449B1 - Procede et dispositif de commande d'un verin hydraulique notamment d'engins de travail - Google Patents

Procede et dispositif de commande d'un verin hydraulique notamment d'engins de travail Download PDF

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Publication number
EP1252449B1
EP1252449B1 EP01902390A EP01902390A EP1252449B1 EP 1252449 B1 EP1252449 B1 EP 1252449B1 EP 01902390 A EP01902390 A EP 01902390A EP 01902390 A EP01902390 A EP 01902390A EP 1252449 B1 EP1252449 B1 EP 1252449B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
pressure
channel
suction
control
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
EP01902390A
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German (de)
English (en)
Other versions
EP1252449A1 (fr
Inventor
Jürgen Weber
Volker BÖSEBECH
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.)
CNH Industrial Baumaschinen GmbH
Original Assignee
O&K Orenstein and Koppel GmbH
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Filing date
Publication date
Application filed by O&K Orenstein and Koppel GmbH filed Critical O&K Orenstein and Koppel GmbH
Publication of EP1252449A1 publication Critical patent/EP1252449A1/fr
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Publication of EP1252449B1 publication Critical patent/EP1252449B1/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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • 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
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/021—Valves for interconnecting the fluid chambers of an actuator
    • 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
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F15B2011/0243—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits the regenerative circuit being activated or deactivated automatically
    • 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
    • F15B2211/20546—Type of pump variable 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
    • 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
    • F15B2211/35—Directional control combined with flow control
    • F15B2211/353—Flow control by regulating means in return line, i.e. meter-out 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/76—Control of force or torque of the 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/775—Combined control, e.g. control of speed and force for providing a high speed approach stroke with low force followed by a low speed working stroke with high force, e.g. for a hydraulic press
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

Definitions

  • the invention is directed to a method and a device for controlling a lifting cylinder of claim 1 or 2 specified genus.
  • a device is z. From EP-A-262 098, EP-A-629 781 or US-A-4 434 708.
  • Hydraulic lifting cylinders of working machines can, if they are under load, lowered without additional energy where it is common, both on the piston side, i.e. in the impression cylinder, as well as on the rod side, i.e. in the suction cylinder space, make an oil filling.
  • the object of the invention is a procedure or to create a device under the setting of the Spool under all pressure conditions during the lowering process sufficiently filling the suction space of the cylinder, wherein automatically switching to normal operation of the cylinder is made as soon as an additional cylinder force in the lowering direction is needed.
  • the above object is achieved by solved that in the control acted upon by the hydraulic pump Distribution channel with two via a control piston Switchable and disconnectable output channels with connecting cables to the impression cylinder space or suction cylinder space is provided of the lifting cylinder, wherein between the one Outlet channel and the distribution channel a check valve, in the distribution channel a check valve influencing the pump flow, between the one Ausganskanal and pressure cylinder space a pressure sensor and an activatable switch for actuating a Hydraulic valve provided for actuating the check valve is.
  • check valve is an integral unit with forms a secondary pressure limiting valve.
  • the invention also allows the use of two pumps, it is then appropriate, at least one controlled in the system Lock and a controlled check valve provided.
  • the device generally designated 1 in the figures for controlling the movement of a lifting cylinder designated 2 is partly symbolic and otherwise in the figures drawn in section and consists essentially of a control element 3 with a control piston which can be displaced therein 4, over the different channels that continue will be described in more detail below, opened, closed or can be connected to each other.
  • control 3 is in the example of FIG. 1 is a cross-sectionally about U-shaped representing distribution channel 5 is provided, which is approximately symmetrical from a pumping channel. 6 is acted upon, to which a hydraulic oil pump 7 is connected is. To shut off the inflow via the pumping channel 6 to the distribution channel 5 is approximately centrally a check valve 8 is provided, which via a switching valve by means of a Pump inlet line 10 with the pump 7 is connectable.
  • the cylinder 2 has a designated suction chamber 11 and with 12 designated pressure chamber defined by one of external load (arrow P), on, via lines with one after the aforementioned pressure definition in the same Way defined pressure channel 13 and a suction channel 14 in Control 3 are connected, wherein the pressure channel 13 and the suction channel 14 parallel to the two partial arms of the pump distribution channel 5 arranged and all these channels over the control piston 4 or fold away.
  • Check valve within a secondary backup 16 may be at sufficiently high pressure in the channel 13 hydraulic fluid from there into the distribution channel 5 flow what is described in more detail below.
  • the device 1, i.e. the control element 3, in the axis of the control piston 4th at one end to a control terminal 17, on at Pressure application of the control piston 4 against a spring 18th can be moved, which is within a spring cap 19th is housed.
  • the pressure in the pressure cylinder chamber 12, or in the thereof to Pressure channel 13 leading line, is via a pressure sensor 20 measurable.
  • a switch 22 Via a line 21 from the spring cap 19 is a switch 22 can be activated, which in turn is connected to the pressure sensor 20, the valve 9 switches.
  • two more parallel Tank channels 23 and 24 are provided, on the one of a respective Secondary backup 16 are applied and the other the supply lines to the tank designated 25, to ensure an overflow depending on the switching process.
  • the Pump 7 can be controlled to zero-promotion or by appropriate Switching means are directed to other consumers.
  • the distribution channel 5 is depressurized and the Shut-off valve 8 also closes automatically in this case.
  • the pressure in the cylinder chamber 12 are in the range of zero.
  • the pressure sensor 20 detects this condition and relieves the check valve 8 from the pump pressure and thus provides for the lowering process the normal operation ago.
  • the switch 22 interrupts the signal from the pressure sensor 20 to the valve 9, the check valve 8 is depressurized and can open.
  • the switch 22 is controlled by the control signal for the "lift” (Fig. 1b) connected, here as an example via the line 21 is removed from the spring cap 19.
  • the river of Hydraulic oil when lifting is also dotted in Fig. 1b indicated.
  • a check valve 29 are provided in a second embodiment of the invention according to FIG. 2 in which when switching the lowering process for the Cylinder 2, the pump flow to the channel 5 is interrupted.
  • FIG. 1 A third embodiment of the invention is shown in FIG.
  • two pumps 7a and 7b in the spool initiated, the pump 7a only for lowering when switched off regenerative circuit and pump 7a and 7b are provided for lifting.
  • This is the pump pressure the pumps 7a connected via the valve 9 to the valve 8a.
  • the pump 7a is lowering switched off by other consumers or depressurized, so that provided for this circuit, the check valve is.
  • Fig. 4 is an advantageous arrangement of the check valve 15 is shown.
  • Valve blocks for working machines have secondary hedges 16.
  • An advantageous and economically more economical design is when the Check valve 15 in the housing of secondary fuses 16 is arranged so that the check valve 15 the Channel 13 connects to the distribution channel 5.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
  • Servomotors (AREA)

Claims (7)

  1. Procédé de commande d'un vérin hydraulique (2) d'engins de travail du type pelles excavatrices, chargeuses sur roues ou similaire, dans lequel le vérin hydraulique (2) peut être alimenté, en direction d'abaissement, par une force externe (charge externe P), en sorte que la chambre de pression (12) et la chambre d'aspiration (11) du vérin hydraulique (2) sont alimentées en fluide de pression par le biais d'une ligne reliant ces deux chambres (11, 12) l'une à l'autre avec un organe de commande (3) prévu à l'intérieur, de telle sorte que l'organe de commande (3) contrôle, par le biais d'une pompe hydraulique (7), les arrivées et écoulements des chambres (12, 11) ainsi que l'écoulement dans un réservoir pour le fluide de travail,
    caractérisé en ce que
    un canal distributeur (5) est alimenté par la pompe hydraulique (7) dans l'organe de commande (3), en sorte que la mise en circuit de la chambre de pression (12) et de la chambre d'aspiration (11) est effectuée via un piston pilote (4) dans l'organe de commande (3),
    en ce que, en présence d'une pression prédéfinie, provoquée par la force/charge externe (P) dans la chambre de pression (12), celle-ci est reliée, par le biais d'une soupape de retenue (15) à ce canal distributeur (5) et en ce que l'arrivée de la pompe (7) au canal distributeur (5) est bloquée par l'intermédiaire d'un clapet antiretour (8) soumis à un capteur de pression (20) ainsi qu'à un commutateur (22) activable par celui-ci, où la chambre d'aspiration (11) est mise en circuit avec le canal (5) et
    en ce que, lorsqu'une autre pression prédéfinie est atteinte, la soupape de retenue (15) se ferme et le clapet antiretour (8), et avec lui l'arrivée de la pompe hydraulique (7) au canal distributeur (5), s'ouvre pour que s'applique une force supplémentaire dans la chambre d'aspiration (11).
  2. Dispositif de commande (1) d'un vérin hydraulique (2) d'engins de travail, du type pelles excavatrices, chargeuses sur roues ou similaire, dans lequel le vérin hydraulique (2) peut être alimenté, en direction d'abaissement, par une force externe (charge extérieure P), en sorte que la chambre de pression (12) et la chambre d'aspiration (11) du vérin hydraulique (2) sont alimentées en fluide hydraulique par l'intermédiaire d'une ligne reliant ces deux chambres (11, 12) avec un organe de commande (3) prévu à l'intérieur, de telle sorte que l'organe de commande (3) contrôle, par l'intermédiaire d'une pompe hydraulique (7), les arrivées et écoulements des chambres (11,12) ainsi que l'écoulement dans un réservoir (25) pour le fluide de travail,
    caractérisé en ce que
    il est prévu dans l'organe de commande (3) un canal distributeur (5) pouvant être alimenté par la pompe hydraulique (7) doté de deux canaux de sortie (13, 14) pouvant être mis en circuit ou hors circuit par le biais d'un piston pilote (4), de lignes de raccordement à la chambre de pression (12), respectivement à la chambre d'aspiration (11) du vérin hydraulique (2), de telle sorte que, entre le premier canal de sortie (13) et le canal distributeur (5), il est prévu une soupape de retenue (15), dans le canal distributeur (5), un clapet antiretour (8) agissant sur l'arrivée de la pompe, entre le premier canal de sortie (13) et la chambre de pression (12), un capteur de pression (20) ainsi qu'un commutateur (22) pouvant être activé par celui-ci permettant d'actionner une soupape hydraulique (9) servant à actionner le clapet antiretour (8).
  3. Dispositif selon la revendication 2,
    caractérisé en ce que
    au niveau des rampes de commande du piston pilote (4), au niveau de l'arrivée et de l'écoulement tant du côté levage que du côté aspiration du vérin (2), il est prévu des rainures de dégagement (26, 27), les rainures côté levage et côté aspiration correspondant au rapport de section des côtés levage et aspiration du vérin.
  4. Dispositif selon la revendication 2 ou 3,
    caractérisé en ce que
    la soupape de retenue (15) constitue avec une soupape de limitation de pression secondaire (16) une unité intégrée dans un ensemble.
  5. Dispositif selon la revendication 5 ou l'une quelconque des suivantes,
    caractérisé en ce que
    l'on prévoit, dans l'organe de commande (3a), deux pompes (7a, 7b) avec une soupape de retenue (15), une autre soupape de retenue (29) ainsi qu'un clapet antiretour (8a) pouvant être alimenté en pression.
  6. Dispositif selon la revendication 2 ou l'une quelconque des suivantes,
    caractérisé en ce que
    l'on prévoit un régulateur de pompe (28) servant à régler la pompe de refoulement (7) en fonction de la pression dans la chambre de pression (12) du vérin (2).
  7. Dispositif selon la revendication 2 ou l'une quelconque des suivantes,
    caractérisé en ce que
    l'on prévoit des rainures de commande pour raccordement du canal de pression (13), respectivement du canal d'aspiration (14) aux canaux de réservoirs associés (16, respectivement 23) pour dérivation d'un excédent d'huile hydraulique dans le réservoir hydraulique (25).
EP01902390A 2000-02-04 2001-02-02 Procede et dispositif de commande d'un verin hydraulique notamment d'engins de travail Expired - Lifetime EP1252449B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10004905 2000-02-04
DE10004905A DE10004905C2 (de) 2000-02-04 2000-02-04 Verfahren und Vorrichtung zur Steuerung eines Hubzylinders insbesondere von Arbeitsmaschinen
PCT/EP2001/001121 WO2001057405A1 (fr) 2000-02-04 2001-02-02 Procede et dispositif de commande d'un verin hydraulique notamment d'engins de travail

Publications (2)

Publication Number Publication Date
EP1252449A1 EP1252449A1 (fr) 2002-10-30
EP1252449B1 true EP1252449B1 (fr) 2004-08-25

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EP01902390A Expired - Lifetime EP1252449B1 (fr) 2000-02-04 2001-02-02 Procede et dispositif de commande d'un verin hydraulique notamment d'engins de travail

Country Status (6)

Country Link
US (1) US6701823B2 (fr)
EP (1) EP1252449B1 (fr)
JP (1) JP4652655B2 (fr)
KR (1) KR20020080338A (fr)
DE (2) DE10004905C2 (fr)
WO (1) WO2001057405A1 (fr)

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CN108626189B (zh) * 2018-05-18 2019-12-24 江苏南京白马现代农业高新技术产业园有限公司 一种控制阀门
CN108644418B (zh) * 2018-05-18 2019-12-24 江苏南京白马现代农业高新技术产业园有限公司 一种用于农机的液压控制装置
CN108626196B (zh) * 2018-05-18 2019-12-24 江苏南京白马现代农业高新技术产业园有限公司 一种用于双液压缸顺序动作的液压阀装置

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DE50103395D1 (de) 2004-09-30
JP2003521652A (ja) 2003-07-15
US20030000373A1 (en) 2003-01-02
US6701823B2 (en) 2004-03-09
EP1252449A1 (fr) 2002-10-30
JP4652655B2 (ja) 2011-03-16
KR20020080338A (ko) 2002-10-23
WO2001057405A1 (fr) 2001-08-09
DE10004905C2 (de) 2002-10-24
DE10004905A1 (de) 2001-08-16

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