EP1711714B1 - Ensemble circuit - Google Patents

Ensemble circuit Download PDF

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Publication number
EP1711714B1
EP1711714B1 EP04801211A EP04801211A EP1711714B1 EP 1711714 B1 EP1711714 B1 EP 1711714B1 EP 04801211 A EP04801211 A EP 04801211A EP 04801211 A EP04801211 A EP 04801211A EP 1711714 B1 EP1711714 B1 EP 1711714B1
Authority
EP
European Patent Office
Prior art keywords
pressure
section
valve
parallel
load
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.)
Not-in-force
Application number
EP04801211A
Other languages
German (de)
English (en)
Other versions
EP1711714A1 (fr
Inventor
Gerd Anton Thiry
Alois Hoffmann
Harald BÄR
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.)
Hydac Fluidtechnik GmbH
Original Assignee
Hydac Fluidtechnik GmbH
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Filing date
Publication date
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Publication of EP1711714A1 publication Critical patent/EP1711714A1/fr
Application granted granted Critical
Publication of EP1711714B1 publication Critical patent/EP1711714B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
    • F15B11/0445—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out" with counterbalance valves, e.g. to prevent overrunning or for braking
    • 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
    • F15B11/162—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for giving priority to particular servomotors or users
    • 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
    • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
    • 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
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-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
    • F15B2211/305—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
    • F15B2211/3055—In combination with a pressure compensating valve the pressure compensating valve is arranged between directional control valve and 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
    • F15B2211/30—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
    • F15B2211/40515—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
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow 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
    • F15B2211/455—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
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means 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
    • F15B2211/50—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
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure 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
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief 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
    • F15B2211/50—Pressure control
    • F15B2211/575—Pilot pressure 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
    • F15B2211/60—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
    • F15B2211/70—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
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/7058—Rotary output members
    • 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
    • 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
    • F15B2211/78—Control of multiple output members
    • F15B2211/781—Control of multiple output members one or more output members having priority

Definitions

  • the invention relates to a circuit arrangement with a load-sensing system according to the feature configuration of the preamble of claim 1.
  • load-pressure signaling system is also used as a synonym for load-sensing system, whereby the named system is a hydraulic control system with pressure and volume flow adaptation to the current requirements of one or more consumers.
  • load-sensing systems which are customary on the market, can be realized with both a constant-displacement pump and a variable-displacement pump.
  • the respective consumers can in principle be arranged in series and / or parallel to one another in the supply circuit.
  • the speed of the consumer is preferably controlled by a proportional flow controller, consisting of proportional throttle valve and bypass pressure compensator, independent of the load pressure.
  • a proportional flow controller consisting of proportional throttle valve and bypass pressure compensator, independent of the load pressure.
  • the speeds of both consumers can be set independently, which makes sense for a variety of applications.
  • the highest load pressure is determined and the pump pressure is raised by a certain amount above this load pressure, for example by means of a circulation pressure compensator.
  • a circulation pressure compensator In a system consisting of a combination of parallel and above-described series connection, however, no higher pressure can build up than is required for the series connection section, since there the excess fluid (oil) is led to the tank via the bypass pressure compensators becomes. This is particularly undesirable if higher pressures are needed in the parallel section, for example, the function a work machine and its parts to ensure that.
  • the invention has the object, while maintaining the advantages of the known circuit arrangements with load-sensing system to further improve that in a particularly energy-efficient manner, the circuit arrangement can be actuated.
  • This object is achieved by a circuit arrangement with the features of claim 1 in its entirety.
  • each consumption of the series section is associated with a bypass pressure compensator and that the control inputs of the respective bypass pressure compensator of the series section each associated with the output of the series section Shuttle valve are connected.
  • the respective highest load pressure is forwarded as a control pressure to the valve unit such that, if the load pressure of the parallel section is higher than the load pressure of the series section, the valve unit throttles the return flow for fluid until the pressure of the supply pump on or above the in the parallel section required pressure increases, the consumers of the parallel section are independent of the pressure level of the consumers of the series section operable. In that regard, it is also possible, regardless of the number of consumers in the series section to ensure sufficient fluid pressure for each consumer in the parallel section. For energy-saving operation of said circuit arrangement also contributes to the fact that the pump pressure depending on the load pressure is always raised only as far as necessary.
  • the valve unit is composed of a hydraulically controllable proportional slide valve, preferably a 2-way proportional slide valve educated. Due to the proportional slide valve, it is possible to raise the pump pressure of the supply pump only as much as necessary, which benefits the energy-saving operation of the entire system and thus the circuit arrangement.
  • a circulation pressure compensator is connected in the supply circuit between the supply pump and the return line, to which the highest load pressure is applied in total.
  • circuit arrangement according to the invention is explained in more detail using an exemplary embodiment according to the drawing.
  • the single figure in the form of a circuit diagram shows the essential components of the circuit arrangement according to the invention.
  • the circuit arrangement according to the invention is equipped with a load-sensing system, which is denoted by LS in the circuit diagram.
  • the circuit arrangement is further characterized in that individual consumers 10 are arranged as series consumers of a series section in the fluid flow direction one behind the other.
  • a parallel consumer 14 is connected in the hydraulic supply circuit 12.
  • the series consumers 10 are formed from individual hydraulic motors and the parallel load 14 from a conventional hydraulically operating working cylinder.
  • Said hydraulic supply circuit 12 opens at its free ends in a supply pump P and in a tank T. The connected to the tank T line of the supply circuit 12 forms the so-called. Return 16 of the circuit arrangement.
  • the load-sensing system LS By means of the load-sensing system LS, it is possible to determine the highest load pressure in the series and the parallel section, which is shown in the circuit diagram with LS series and LS-parallel.
  • the respective highest load pressure is forwarded as control pressure to a valve unit 18 for its activation. If, for example, the load pressure of the parallel section with the parallel consumers 14 is higher than the load pressure of the series section with the series consumers 10, the valve unit 18 is throttled so much relative to the return 16 for fluid until the pressure of the supply pump P is on or above that in the parallel section required pressure for this consumer 14 increases.
  • the parallel consumer 14 regardless of the pressure level of the series consumers 10 and to drive in such a way, which was not possible with the previously known circuit arrangements with load-sensing system.
  • the series or parallel section consists of at least one consumer 10,14, wherein preferably two series-connected loads 10 of the series section are arranged in the fluid flow direction before the parallel section with a parallel load 14.
  • the above-mentioned valve unit 18, the control pressures processed by the load-sensing system consists of a hydraulically controllable proportional spool valve, preferably a 2-way proportional spool valve.
  • each consumer 10 of the series section is assigned a bypass pressure compensator 20, 22.
  • the one control pressure line for the valve unit 18 is connected to a shuttle valve 24 of the series section and the other control pressure line to a shuttle valve 26 of the parallel section and to a shuttle valve 28 of the load-sensing system LS. How the connection is made in detail results directly from the circuit arrangement according to the figure. Furthermore, the control inputs of the respective bypass pressure compensators 20,22 of the series section are each connected to the associated output of the changeover valve 24 associated with the series section. As is clear from the circuit diagram, the output of the pressure compensator 20 is fluidly connected to the input of the pressure compensator 22 and the output of the pressure compensator 22 opens into the return line 16, which is connected on the input side to the valve unit 18.
  • a circulation pressure compensator 38 is connected in the supply circuit 12.
  • the control pressures for this circulating pressure compensator 38 are in turn formed on the one hand via the load-sensing system LS and on the other side on the input pressure to the pressure compensator 38 itself.
  • the output of the pressure compensator 38 is fluidly connected to the return line 16 and the input side with the supply pump P.
  • the pending pump supply pressure is also on the line 40 at the entrance of a 4/3-way valve 42 at.
  • the load-sensing system LS is protected by a pressure limiting valve 44 and is connected via a throttle or orifice 46 with the LS - total side of the shuttle valve 28.
  • the output side of the 4/3-way valve 42 opens into two parallel strands in the shuttle valve 26 and in two mutually releasable check valves 48, which in turn are connected on the output side to the piston and rod space of the working cylinder as parallel consumers 14.

Claims (7)

  1. Circuit comprenant un système (LS) de détection de charge, dans lequel divers consommateurs (10, 14) sont montés tant en série en formant une section en série qu'également en parallèle en formant une section parallèle dans un circuit (12) d'alimentation hydraulique ayant au moins une pompe (P) d'alimentation et un retour (16) pour du fluide, le système (LS) de détection de charge déterminant la pression de charge respectivement la plus grande dans la section en série et dans la section en parallèle et la pression de charge effectivement la plus grande étant acheminée en tant que pression de commande à une unité (18) de vanne de façon à ce que, tant que la pression de charge de la section en parallèle est plus grande que la pression de charge de la section en série, l'unité de vanne étrangle le retour (16) pour du fluide jusqu'à ce que la pression de la pompe (P) d'alimentation s'élève à la pression nécessaire à la section en parallèle ou au delà, caractérisé en ce qu'il est affecté à chaque consommateur (10) de la section en série une balance de pression (20, 22) de dérivation et en ce que les entrées de commande des balances (20, 22) de pression de dérivation de la section en série sont raccordés respectivement à la sortie d'une vanne (24) à deux voies associés à la section en série.
  2. Circuit suivant la revendication 1, caractérisé en ce que l'unité (18) de vanne est formée d'une vanne à passage directe proportionnelle, pouvant être commandée hydrauliquement, de préférence d'une vanne à passage directe proportionnelle, à deux voies.
  3. Circuit suivant la revendication 1 ou 2, caractérisé en ce que l'une des lignes de pression de commande pour l'unité (18) de vanne est raccordée à la vanne (24) à deux voies de la section en série et l'autre ligne de pression de commande a au moins une vanne (26) à deux voies de la section en parallèle et a au moins une vanne (28) à deux voies du système (LS) de détection de charge.
  4. Circuit suivant l'une des revendications 1 à 3, caractérisé en ce que entre la pompe (P) d'alimentation et le retour (16) est montée une balance (38) de pression de recirculation dans le circuit (12) d'alimentation, à laquelle s'applique dans l'ensemble la pression de charge la plus grande.
  5. Circuit suivant l'une des revendications 1 à 4, caractérisé en ce qu'entre le premier consommateur (10) de la section en série dans le sens du courant de fluide et la pompe (P) d'alimentation est montée une vanne (30) d'étranglement proportionnelle, tout comme une autre vanne (32) d'étranglement proportionnelle entre le consommateur (10) respectivement précédent et le consommateur (10) respectivement suivant d'une section en série.
  6. Circuit suivant l'une des revendications 1 à 5, caractérisé en ce qu'entre la vanne (26) à deux voies de la section en parallèle et le consommateur (14) associé sont montés des clapets antiretours (48) pouvant être débloqués dans des sens opposés.
  7. Circuit suivant l'une des revendications 1 à 6 caractérisé en ce que le consommateur (10) respectif de la section en série est un moteur hydraulique et le consommateur (14) de la section en parallèle est un vérin de travail hydraulique.
EP04801211A 2004-02-05 2004-12-08 Ensemble circuit Not-in-force EP1711714B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004005606A DE102004005606B3 (de) 2004-02-05 2004-02-05 Schaltungsanordnung
PCT/EP2004/013927 WO2005075833A1 (fr) 2004-02-05 2004-12-08 Ensemble circuit

Publications (2)

Publication Number Publication Date
EP1711714A1 EP1711714A1 (fr) 2006-10-18
EP1711714B1 true EP1711714B1 (fr) 2008-06-11

Family

ID=34832524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04801211A Not-in-force EP1711714B1 (fr) 2004-02-05 2004-12-08 Ensemble circuit

Country Status (6)

Country Link
US (1) US7426884B2 (fr)
EP (1) EP1711714B1 (fr)
JP (1) JP4777910B2 (fr)
AT (1) ATE398240T1 (fr)
DE (2) DE102004005606B3 (fr)
WO (1) WO2005075833A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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JP4081487B2 (ja) * 2004-12-28 2008-04-23 東芝機械株式会社 油圧制御弁
DE102006037631A1 (de) * 2006-08-10 2008-02-14 Hydac Fluidtechnik Gmbh Betätigungsvorrichtung
DE102006060335B3 (de) * 2006-12-20 2008-08-21 Sauer-Danfoss Aps Hydraulische Ventilanordnung
DE102007014550A1 (de) 2007-03-27 2008-10-09 Hydac Filtertechnik Gmbh Ventilanordnung
DE102009028816A1 (de) * 2009-08-21 2011-02-24 Deere & Company, Moline Hydraulische Anordnung
DE102009052077A1 (de) * 2009-11-05 2011-05-12 Robert Bosch Gmbh Hydraulische Steueranordnung mit über ein LS-Ventil veränderbarem Regeldruckgefälle
US8596417B2 (en) * 2011-07-05 2013-12-03 Honeywell International Inc. Lubrication systems with nozzle blockage detection systems
CN103398034B (zh) * 2013-08-15 2015-08-26 中机美诺科技股份有限公司 一种用于马铃薯播种机的液压控制系统
DE102014110007B4 (de) * 2014-07-16 2016-02-04 Gebr. Heller Maschinenfabrik Gmbh Spanneinheit und Spannfuttereinheit einer Spannvorrichtung sowie Verfahren zur Ausführung einer Spann- oder Lösebewegung zum Einspannen oder Lösen eines Werkstücks
SG10201704185YA (en) * 2017-05-23 2018-12-28 Hock Hai Low Method of aligning a flat or profiled metal sheet
DE102017005479A1 (de) 2017-06-08 2018-12-13 Hydac Systems & Services Gmbh Druckversorgungsvorrichtung

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EP0221852A3 (fr) * 1985-11-07 1988-11-23 Fritz Haug AG Dispositif pour travailler des matériaux relativement durs
JPS63115903A (ja) * 1986-11-05 1988-05-20 Kobe Steel Ltd 油圧制御装置
FR2754571B1 (fr) * 1996-10-16 1998-12-24 Rexroth Sigma Dispositif de distribution hydraulique multiple
JP4668445B2 (ja) * 2001-03-29 2011-04-13 東芝機械株式会社 油圧制御装置、建設機械および油圧ショベル

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EP2927371A1 (fr) * 2014-04-05 2015-10-07 Hydac Fluidtechnik GmbH Circuit

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DE502004007371D1 (de) 2008-07-24
EP1711714A1 (fr) 2006-10-18
JP2007520674A (ja) 2007-07-26
WO2005075833A1 (fr) 2005-08-18
US20070137192A1 (en) 2007-06-21
JP4777910B2 (ja) 2011-09-21
US7426884B2 (en) 2008-09-23
WO2005075833A8 (fr) 2005-11-17
DE102004005606B3 (de) 2005-10-06
ATE398240T1 (de) 2008-07-15

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