EP2103813B1 - Dispositif de commande hydraulique - Google Patents

Dispositif de commande hydraulique Download PDF

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Publication number
EP2103813B1
EP2103813B1 EP08005381A EP08005381A EP2103813B1 EP 2103813 B1 EP2103813 B1 EP 2103813B1 EP 08005381 A EP08005381 A EP 08005381A EP 08005381 A EP08005381 A EP 08005381A EP 2103813 B1 EP2103813 B1 EP 2103813B1
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EP
European Patent Office
Prior art keywords
hydraulic
control device
consumer
blocking
dead space
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
EP08005381A
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German (de)
English (en)
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EP2103813A1 (fr
Inventor
Martin Heusser
Hilarius Hundschell
Sascha Rümenap
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.)
Hawe Hydraulik SE
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Hawe Hydraulik SE
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Publication date
Application filed by Hawe Hydraulik SE filed Critical Hawe Hydraulik SE
Priority to ES08005381T priority Critical patent/ES2363877T3/es
Priority to EP08005381A priority patent/EP2103813B1/fr
Priority to US12/407,496 priority patent/US8245507B2/en
Publication of EP2103813A1 publication Critical patent/EP2103813A1/fr
Application granted granted Critical
Publication of EP2103813B1 publication Critical patent/EP2103813B1/fr
Not-in-force 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • 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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
    • F15B11/127—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action with step-by-step action
    • F15B11/128—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action with step-by-step action by means of actuators of the standard type with special circuit controlling means
    • 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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
    • F15B11/13—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action using separate dosing chambers of predetermined volume
    • 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
    • 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
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3138—Directional 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
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31505—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and a return line
    • F15B2211/31511—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and a return line having a single pressure source
    • 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
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31552—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line
    • F15B2211/31558—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line having 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
    • F15B2211/35—Directional control combined with flow 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
    • F15B2211/625—Accumulators
    • 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
    • F15B2211/765—Control of position or angle 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
    • F15B2211/8855—Compressible fluids, e.g. specific to pneumatics

Definitions

  • the invention relates to a solar panel SonnenstandsnachGermanvortechnisch or machine tool adjusting device comprising a hydraulic control device according to the preamble of patent claim 1 and a method according to the preamble of claim 11.
  • Such demands on extremely small steps of a hydraulic consumer occur, for example, in machine tools for feed steps, and more recently especially on solar panels, the sun as accurately as possible, preferably every few minutes, tracked.
  • solar panels are usually adjusted in large numbers in solar power plants of individual tracking devices, the above-described high structural and control engineering effort is not to be tolerated cost factor.
  • tracking devices include an electro-hydraulic control device, which, of course, will only consume a fraction of the electrical energy gained from the solar panel. This requires extremely low-power magnets with minimal power consumption, which does not create extremely small positioning movements.
  • Out FR-A-2700811 is a device in hydraulic / pneumatic combination design known with the in a connected to a hydraulic part test tube rectangular pressure signals can be generated.
  • a series of 2/2-way valves, cam-operated against spring force, operates in such a way that a leak-free shut-off position can be temporarily set in each directional control valve.
  • the invention has for its object to provide a hydraulic control device and a method for adjusting at least one hydraulic consumer in minimal steps, with which in a structurally simple, cost-effective and energy-saving manner hydraulic consumers are controlled in extremely small setting steps.
  • hydraulic media such as hydraulic oil or the like
  • the practice shows that such hydraulic media may well have a compressibility of between about 0.15-1.0% under high working pressures.
  • This compressibility is used according to the invention in the hydraulic control device, in particular for machine tool actuators or solar panel sun tracking devices, and in the method for controlling at least one hydraulic consumer in extremely small setting steps. More specifically, in the metering device in the dead space hydraulic medium compressed and used by the compression in the given capacity of the dead space additionally housed hydraulic medium dose for controlling each step of adjusting the hydraulic consumer. This hydraulic medium dose is either discharged from the hydraulic consumer or fed into the hydraulic consumer.
  • a pressure difference built up via the metering device is used, in which the first shut-off valve is brought into the through position when the second obturator is in the blocking position and the exactly measured hydraulic medium dose is stored in compressed form at higher pressure from upstream in the dead space, before the first shut-off element in the blocking position is switched.
  • This generates a minimum setting step for an upstream-connected hydraulic consumer. If the hydraulic consumer, however, connected downstream, then by opening the second shut-off when switched back to the blocking position first shut-off then the lower pressure downstream displaced by expansion hydraulic medium dose fed into the hydraulic consumer to move it over a minimum setting step.
  • the dead space is a dense container of a given capacity and / or a corresponding long conduit portion between the obturators or at least partially provided in one or both of the obturators. In this case, it is important that both shut-off elements are leakproof, free seat valves in their blocking positions.
  • the time intervals between the setting steps can be selected arbitrarily short or as long as desired.
  • the hydraulic consumer is a one-sided against a load or a double-acting hydraulic cylinder for rotating or tilting a solar panel, optionally a differential cylinder, being provided either in a working line or in both working lines of the hydraulic cylinder, a metering device is.
  • the metering device may be used to meter hydraulic fluid from the piston rod side chamber to the piston side chamber, or vice versa.
  • a preload valve downstream of the second shut-off member it is expedient to arrange a preload valve downstream of the second shut-off member.
  • the hydraulic consumer in a working line at least one pressure accumulator is assigned, which is preferably fed from the pressure source or the hydraulic consumer itself, and the metering device in at least one via a directional control valve with optional arranged the pressure source or the return connectable working line of the hydraulic consumer.
  • the metering device belonging to the pressure source pump can be switched off or be.
  • An in Fig. 1 schematically indicated hydraulic control device S is designed, inter alia, that a hydraulic consumer H can be controlled by means of an at least limited compressible hydraulic medium in minimal small adjustment steps.
  • a setting step is controlled either by draining or feeding into the hydraulic consumer a dose of hydraulic medium which is precisely measured by utilizing the compressibility.
  • the hydraulic control device S has, for example, a pump P as a pressure source (or a pressure accumulator, not shown), which supplies a line 1 with hydraulic medium.
  • the line 1 is either a feed, a drain or a bypass line, to which, the hydraulic consumer H is connected.
  • a metering device D is included, which consists of a first shut-off member G1 and a downstream of this second shut-off member G2 and a dead space T arranged therebetween.
  • Each obturator G1, G2 is switchable between a leak-free shut-off position (as shown) and a passage position, either manually or, as shown, by means of a magnet 2, 3.
  • the dead space T is, for example, a container 6 which is formed dense and of a certain size. Alternatively (indicated by dashed lines), the capacity of the container 6 could be changed by a manually or hydraulically (indicated at 7) adjustable boundary wall 6.
  • the dead space T could be formed at least partially in the conduit 1 ', or, not shown, at least partially in the Absperrgliedern G1, G2. Downstream of the second shut-off member G2, a biasing valve 4 to a return R is provided as an option.
  • a pressure difference .DELTA.p is established via the metering device D.
  • the blocking members G1, G2 are e.g. both in their closed positions.
  • the hydraulic medium is, for example, hydraulic oil with a compressibility of about 0.7%.
  • the shut-off member G1 is switched to the passage position while the second shut-off member G2 is held in the locking position.
  • the hydraulic medium is compressed, i. it enters a hydraulic medium dose.
  • the first shut-off member G1 is switched to the shut-off position.
  • the hydraulic medium is compressed in the dead space T.
  • the second shut-off member G2 is then switched to the passage position, so that the compressed hydraulic medium in the dead space 6 can relax through the second shut-off member G2 and thereby a hydraulic medium dose is displaced.
  • the hydraulic consumer H If the hydraulic consumer H is connected upstream of the metering device D, it performs a small positioning step when switching the first shut-off element G1 into the passage position, depending on the dimensioning of the hydraulic medium dose flowing into the dead space T for compressing the hydraulic medium.
  • the hydraulic consumer H downstream of the second Absperrgliedes G2 connected he performs when switching the second Absperrgliedes G2 in the passage position from a small setting step.
  • the hydraulic consumers H can be acted on one side against a load, or double-acting acted upon. Upstream of the hydraulic consumer H shown on the left or downstream of the right-hand hydraulic consumer H, further components (not shown) may be provided so that the respective hydraulic consumer only responds to the moved hydraulic medium dose for a small positioning step.
  • Fig. 2 shows the metering device D integrated into a hydraulic control device S, which belongs, for example, to a solar panel sun tracking device V.
  • the hydraulic control device S is connected to a motor pump unit 8, in which an electric motor M and as a pressure source, a pump P and a reservoir or return R are housed. From the pump P, a connecting line 9 leads to a solenoid-way valve 12, from which also a return line 10 leads to the return R.
  • the hydraulic consumer H is, for example, a double-sided acted differential cylinder, to the working spaces of the solenoid-way valve 12 two working lines 13, 14 lead. In the working line 13, which is secured by a pressure relief valve 16 and a check valve, adjacent to the hydraulic consumer H a pressure accumulator 15 is arranged.
  • the hydraulic control device S in Fig. 3 is incorporated with the dosing device D in a solar panel sun tracking device V, here for rotating the solar panel according to the position of the sun.
  • the motor pump unit 8 contains in addition to the reversible pump P two pressure-responsive switching valves 18 and a solenoid-operated directional control valve 19, from the connecting lines 20 to a tilt adjustment of the solar panel, not shown, and a connecting line 9 for rotational adjustment, for example, a column 17, the solar panel leads.
  • the Verbin Medgs effet 9 branches to a magnetic Wegesitzventil 12 in two working lines 13, 14 which lead to the two Beauftschungslay two double-acting hydraulic consumers H (hydraulic cylinder) for rotating the column 17.
  • the column 17 is placed by means of the hydraulic consumer H in the correct position. Thereafter, the pump P.
  • the connecting line 9 is relieved via the solenoid-way valve 19 and the left valve 18 to the return R.
  • the solenoid directional seat valve 12 is in the position shown, in which the working line 13 and the charged pressure accumulator and the working line 14 between the Hydrotileem H and the metering device D are under pressure.
  • the dosing device D is actuated by alternately switching the first and second shut-off members G1, G2 at certain intervals in order to control both hydraulic consumers in small actuating steps and to track the column 17 to the position of the sun.
  • the two hydraulic consumers H are connected in series here, that is, hydraulic medium discharged from a hydraulic consumer H is fed into the admission space of the second hydraulic consumer.
  • Fig. 5 illustrates a hydraulic control device S for adjusting a hydraulic consumer H in small steps, eg in the exit direction against a load.
  • the hydraulic consumer H is a differential hydraulic cylinder whose Beauftschungsschreib are connected to the two working lines 13, 14.
  • the pump P is included with the pressure relief valve 16.
  • the pressure accumulator 15 is connected to the working line 14.
  • the bypass line 1 'connects the two working lines 13, 14 and contains the metering device D.
  • the working line circuit is closed here.
  • the hydraulic consumer H or the differential hydraulic cylinder is first retracted by means of the pump P. Then the pump P is turned off. By stepwise pressing the metering device D, the hydraulic differential cylinder is extended in small steps.
  • FIG. 6 which is largely the embodiment of Fig. 5 corresponds, the pressure accumulator 15 is connected to the working line 13. Again, the differential cylinder is extended from the fully retracted position in small steps by the metering device D is actuated.
  • Fig. 7 illustrates a hydraulic control device S for a one-sided acted upon by a load hydraulic differential cylinder as a hydraulic consumer H.
  • a load hydraulic differential cylinder as a hydraulic consumer H.
  • the working line 14 of the pressure accumulator 15 is connected to the piston-side chamber.
  • the working line 13 leads from the pump P to the piston-side chamber.
  • the metering device D is provided, which is actuated when the pump P is switched off for stepwise retraction of the differential hydraulic cylinder.
  • the metering device D can also be used in machine tools or other machines in which extremely small steps of Hydrosedem are needed, for example in a machine tool in a feed actuator.

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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)

Claims (15)

  1. Dispositif d'asservissement à la hauteur du soleil de panneaux solaires ou dispositif de réglage de machines-outils comprenant un dispositif de commande hydraulique (S) pour le déplacement d'au moins un consommateur hydraulique (H) au moyen d'un agent hydraulique de compressibilité limitée, qui est injecté sous pression dans une conduite d'alimentation, d'échappement ou de bipasse (1, 1', 13, 14), faisant partie du dispositif de commande (S), du consommateur hydraulique (H), au moins une source de pression (P, 15) et éventuellement une soupape de commande directionnelle (12) étant prévues, un dispositif de dosage (D) pour respectivement une dose d'agent hydraulique à envoyer dans le consommateur hydraulique ou à évacuer de ce dernier en utilisant la compressibilité de l'agent hydraulique étant prévu dans la conduite (1, 1', 13, 14), le dispositif de dosage (D) présentant de l'amont vers l'aval, dans un montage en série, un premier et un second organes d'arrêt (G1, G2), commutables chacun entre une position d'arrêt sans fuite et une position de passage, et un espace mort (T) intermédiaire, et les organes d'arrêt (G1, G2) étant commutables alternativement pour le dosage, caractérisé en ce que les organes d'arrêt (G1, G2) sont des soupapes à siège (V1, V2), de préférence des soupapes à siège à ressort (V1, V2) commutables manuellement, par voie hydraulique ou magnétique.
  2. Dispositif de commande hydraulique suivant la revendication 1, caractérisé en ce que l'espace mort (T) présente un récipient étanche (6).
  3. Dispositif de commande hydraulique suivant la revendication 2, caractérisé en ce que la dimension du récipient (6) est modifiable par voie mécanique ou hydraulique (7).
  4. Dispositif de commande hydraulique suivant la revendication 1, caractérisé en ce que l'espace mort (T) comporte une section de conduite (1') entre les organes d'arrêt (G1, G2).
  5. Dispositif de commande hydraulique suivant la revendication 1, caractérisé en ce que l'espace mort (T) est prévu au moins en partie dans un ou dans les deux organes d'arrêt (G1, G2).
  6. Dispositif de commande hydraulique suivant la revendication 1, caractérisé en ce que le consommateur hydraulique (H) est un cylindre hydraulique pouvant être sollicité unilatéralement contre une charge ou bilatéralement, et qu'un dispositif de dosage (D) est prévu dans uniquement une conduite de travail (13, 14) ou dans les deux conduites de travail du cylindre hydraulique.
  7. Dispositif de commande hydraulique suivant la revendication 6, caractérisé en ce que le consommateur hydraulique (H) est un cylindre différentiel.
  8. Dispositif de commande hydraulique suivant la revendication 1, caractérisé en ce qu'une soupape de précontrainte (4) est disposée en aval du second organe d'arrêt (G2).
  9. Dispositif de commande hydraulique suivant l'une au moins des revendications précédentes, caractérisé en ce que le consommateur hydraulique (H) et le dispositif de dosage (D) sont disposés dans le dispositif d'asservissement (V) à la hauteur du soleil de panneaux solaires ou dans le dispositif de réglage de machines-outils.
  10. Dispositif de commande hydraulique suivant l'une au moins des revendications précédentes, caractérisé en ce qu'au moins un accumulateur de pression (15), faisant partie du dispositif de commande (S), est associé au consommateur hydraulique (H) dans un circuit de conduites de travail, lequel accumulateur peut être alimenté, de préférence, à partir de la source de pression ou du consommateur hydraulique (H), et que le dispositif de dosage (D) est disposé dans au moins une conduite de travail (13, 14) du consommateur hydraulique, raccordable par l'intermédiaire d'un distributeur (19, 12), qui fait partie du dispositif de commande (S), et sélectivement à la source de pression (P) ou au retour (R).
  11. Procédé de déplacement d'au moins un consommateur hydraulique (H) en étapes minimales par un dispositif de commande (S) hydraulique, consommant un agent hydraulique de compressibilité limitée, d'un dispositif d'asservissement à la hauteur du soleil de panneaux solaires ou d'un dispositif de réglage de machines-outils, le dispositif de commande étant raccordé à au moins une source de pression (8, 15), caractérisé en ce qu'une différence de pression est établie et maintenue par l'intermédiaire d'au moins un dispositif de dosage hydraulique (D), constitué d'un premier et d'un second organes d'arrêt (G1, G2), montés l'un derrière l'autre de l'amont vers l'aval et commutables respectivement entre une position d'arrêt sans fuite et une position de passage, et d'un espace mort intermédiaire (T), et qu'une dose d'agent hydraulique est calculée dans le dispositif de dosage (D), en utilisant la compressibilité de l'agent hydraulique, le premier organe d'arrêt (G1), disposé en amont, étant commuté dans la position de passage dans la position d'arrêt du second organe d'arrêt (G2), de l'agent hydraulique étant comprimé dans l'espace mort (T), puis le premier organe d'arrêt (G1) étant commuté dans la position d'arrêt et le second organe d'arrêt (G2) dans la position de passage, et l'agent hydraulique, comprimé dans l'espace mort (T), étant détendu par déplacement de la dose d'agent hydraulique au travers du second organe d'arrêt (G2) à la pression régnant en aval de cet organe (G2), la dose d'agent hydraulique formée étant alors soutirée du consommateur hydraulique (H) ou envoyée dans ce dernier.
  12. Procédé suivant la revendication 11, caractérisé en ce que la dose d'agent hydraulique, formée lors d'un cycle de calcul défini par au moins une commutation successive alternative triple des organes d'arrêt (G1, G2), est calculée au moins par réglage de la différence de pression (Δp) et/ou de la durée respective de la position de passage du premier et/ou du second organe d'arrêt (G1, G2) et/ou d'un choix de la dimension de l'espace mort (T).
  13. Procédé suivant la revendication 11, caractérisé en ce que la dimension de l'espace mort (T) est modifiée par voie mécanique ou hydraulique (7) pour modifier la dose d'agent hydraulique.
  14. Procédé suivant la revendication 11, caractérisé en ce que les deux organes d'arrêt (G1, G2) sont commutés chacun alternativement et séparément pour le calcul.
  15. Procédé suivant la revendication 11, caractérisé en ce que les deux organes d'arrêt (G1, G2) sont commutés alternativement et avec un chevauchement mutuel pour le calcul.
EP08005381A 2008-03-20 2008-03-20 Dispositif de commande hydraulique Not-in-force EP2103813B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES08005381T ES2363877T3 (es) 2008-03-20 2008-03-20 Dispositivo de control hidráulico.
EP08005381A EP2103813B1 (fr) 2008-03-20 2008-03-20 Dispositif de commande hydraulique
US12/407,496 US8245507B2 (en) 2008-03-20 2009-03-19 Hydraulic control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08005381A EP2103813B1 (fr) 2008-03-20 2008-03-20 Dispositif de commande hydraulique

Publications (2)

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EP2103813A1 EP2103813A1 (fr) 2009-09-23
EP2103813B1 true EP2103813B1 (fr) 2011-05-18

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EP08005381A Not-in-force EP2103813B1 (fr) 2008-03-20 2008-03-20 Dispositif de commande hydraulique

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EP (1) EP2103813B1 (fr)
ES (1) ES2363877T3 (fr)

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Publication number Priority date Publication date Assignee Title
US8464742B2 (en) * 2010-02-11 2013-06-18 Honeywell International Inc. Injection or other system with anti-thermal lockdown mechanism and related method

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Publication number Priority date Publication date Assignee Title
US1888310A (en) * 1930-07-07 1932-11-22 Prosperity Co Inc Pressing machine with storage tanks
FR2700811B1 (fr) * 1993-01-28 1996-02-16 Sta Controle Dispositif pour générer une pression variable au sein d'un liquide.
US6269641B1 (en) * 1999-12-29 2001-08-07 Agip Oil Us L.L.C. Stroke control tool for subterranean well hydraulic actuator assembly
US7325398B2 (en) * 2004-03-05 2008-02-05 Deere & Company Closed circuit energy recovery system for a work implement

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US8245507B2 (en) 2012-08-21
ES2363877T3 (es) 2011-08-18
EP2103813A1 (fr) 2009-09-23
US20090235921A1 (en) 2009-09-24

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