EP3109485B1 - Systeme hydraulique destine a l'alimentation en fluide sous pression d'un verin hydraulique comprenant trois surfaces actives separees alimentees en fluide sous pression et procede de fonctionnement dudit systeme hydraulique - Google Patents

Systeme hydraulique destine a l'alimentation en fluide sous pression d'un verin hydraulique comprenant trois surfaces actives separees alimentees en fluide sous pression et procede de fonctionnement dudit systeme hydraulique Download PDF

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Publication number
EP3109485B1
EP3109485B1 EP16169921.0A EP16169921A EP3109485B1 EP 3109485 B1 EP3109485 B1 EP 3109485B1 EP 16169921 A EP16169921 A EP 16169921A EP 3109485 B1 EP3109485 B1 EP 3109485B1
Authority
EP
European Patent Office
Prior art keywords
hydraulic system
reservoir
piston
hydraulic
working chamber
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
EP16169921.0A
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German (de)
English (en)
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EP3109485A1 (fr
Inventor
Udo Froehlich
Matthias Oppelt
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Publication date
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Publication of EP3109485A1 publication Critical patent/EP3109485A1/fr
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Publication of EP3109485B1 publication Critical patent/EP3109485B1/fr
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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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/022—Installations or systems with accumulators used as an emergency power source, e.g. in case of pump failure
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • F15B1/033—Installations or systems with accumulators having accumulator charging devices with electrical control 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F15B11/036—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1466—Hollow piston sliding over a stationary rod inside the cylinder
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports
    • F15B2201/4155—Gas ports having valve 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators

Definitions

  • the invention relates to a hydraulic system according to claim 1.
  • the invention relates to a method for operating the hydraulic system according to the invention according to method claim 12.
  • the document D 10 2012 012 142 A1 describes a hydraulic adjusting device having a control function for a working and a special operation.
  • a dedicated double-acting actuator cylinder can be acted upon by a working pressure medium and to fulfill the control function in special operation with a pressure medium storage connected, which has a separate from the working pressure medium compressed gas.
  • the document EP 2 420 681 A2 describes a hydraulic linear drive with a running with three pressure chambers hydraulic cylinder, the active surfaces are coordinated so that in a rapid traverse and in a power stroke, a drive of the hydraulic cylinder with pressure medium supplying hydraulic machine operates in about the same speed / torque range.
  • the invention is based on the object to provide a hydraulic system for supplying pressure medium of a hydraulic cylinder with three separate druckstoffbeetzschlagbaren effective areas, which is less expensive to manufacture and / or to operate.
  • a hydraulic system includes a hydraulic cylinder having at least three separate pressure-sensitive surfaces. There are one first active surface and a second active surface for a movement of a piston / rod member of the hydraulic cylinder in its extension direction druckffenbeetzschlagbar.
  • a memory switching valve is provided, by means of which the second active surface can be acted upon by a pressure medium of a charged memory in the extension direction, in particular during an emergency operation for fast and / or maximum extension of the piston / rod element.
  • An advantage of the hydraulic system according to the present invention is that the solution according to the invention that the second active surface for extending the piston / rod element can be acted upon by pressure medium from the charged reservoir, allows a simpler special design of the hydraulic cylinder and thus saves on manufacturing costs.
  • the hydraulic system according to the invention is advantageously used, for example, in wind power plants for hydraulic pitch adjustment, in particular of a rotor or of rotor blades.
  • the second active surface in addition to the first effective area for the movement of the piston / rod element in the direction of the preferred position druckstoffbeetzbar, whereby a quick adjustment is possible.
  • a charging valve is provided, by means of which, in particular during a charging operation in which the accumulator is charged with pressure medium, a first working area delimited by the first working space of the hydraulic cylinder is fluidically connectable to a second working area bounded by the second working area of the hydraulic cylinder.
  • the memory in particular after execution of the emergency operation, can be charged with pressure medium.
  • the piston / rod element is advantageously moved completely counter to the extension direction in order to convey pressure medium from the second working space back into the hydraulic circuit when the storage switching valve and charging valve are open.
  • a further advantage of the hydraulic system according to the invention is that a low-pressure accumulator, from which pressure medium can be sucked by the hydraulic machine, can be dimensioned considerably smaller than the known hydraulic systems of this type.
  • the memory from which the second active surface can be acted upon with pressure medium is advantageously designed as a high-pressure accumulator.
  • the inventive hydraulic system is thus, in addition to the above-mentioned wind turbines, also in hydraulic presses and plastic injection machines, and generally used in hydraulic systems with a high-pressure accumulator and a low-pressure accumulator.
  • a negative pressure in particular a vacuum
  • the piston / rod element is movable in the closed second working space in or against the extension direction.
  • a hydraulic machine by means of which in each case the first active surface or a third active surface of the hydraulic cylinder in a closed hydraulic circuit can be acted upon with pressure medium, wherein the third active surface for moving the piston / rod element against the extension direction can be acted upon with pressure medium.
  • the first working space and the third working space are each directly controllable.
  • the first active surface for moving the piston / rod element in the extension direction is acted upon by a pressure medium and the third active surface is acted upon to move the piston / rod element against the extension direction with a pressure medium.
  • the hydraulic machine can in particular be designed to be variable in speed and / or in particular drivable to rotate and / or swivel through in the direction of rotation.
  • no pressure medium can flow into the second working space during normal operation of the hydraulic cylinder.
  • the first effective area is the same size as the third effective area.
  • the second effective area may deviate from the size of the two other active areas, in particular be larger than the first effective area or the third effective area. In emergency mode thus a differential behavior of the hydraulic cylinder is given.
  • the, in particular hollow cylindrical design, hydraulic cylinder in its housing a, in particular cylindrical, guide pin, on which the piston / rod member is mounted axially displaceable.
  • the first working space of the guide pin and the piston / rod element is limited
  • the second Working space is limited by the guide pin and the piston / rod element and the housing.
  • the third working space is limited by the piston / rod member and the housing.
  • the piston / rod member has a substantially annular radial collar at an open end portion, or at a position between a closed end portion of the piston / rod member and the open end portion.
  • the respective working spaces delimited by the piston / rod element, in particular the second working space and the third working space are limited by means of the radial collar or by means of its annular surfaces.
  • the piston / rod element protrudes with its closed end from an end section of the housing which points essentially in the direction of extension and from which a cylinder head is formed.
  • the guide pin can be arranged on a substantially pointing away from the extension direction end portion of the housing, of which a cylinder bottom is formed.
  • the guide pin is fixedly connected to the housing or formed integrally with the housing.
  • the first active surface may be arranged at the closed end portion of the, in particular hollow cylinder-shaped, piston / rod element on an inner contour, wherein the first active surface points substantially towards the cylinder base and away from the extension direction.
  • the second active surface may be arranged on an outer contour, in particular formed as an annular radial collar, of the piston / rod element, wherein the second active surface points substantially toward the cylinder base and away from the extension direction.
  • the third active surface may be arranged on the, in particular designed as an annular radial collar, the outer contour of the piston / rod element, wherein the third active surface is substantially toward the cylinder head and towards the extension direction.
  • the storage switching valve is connected in a storage flow path between the storage and the second working space, and the charging valve is connected in an intermediate branch of the storage flow path between the storage switching valve and the second working space.
  • the intermediate branch between the first working space and a pressure medium source is fluidly connected to a first flow path.
  • the second working space is divided into a first chamber and a second chamber by means of a fluid-tight partition wall or plate or steel plate.
  • a complete retraction of the piston / rod element in the charging operation is not necessary, since the resulting during normal operation in the first chamber negative pressure or the resulting vacuum is effectively separated by the partition from a pressure medium present in the second chamber.
  • the charging operation can be terminated at an almost arbitrary position, without negatively affecting the subsequent normal operation.
  • Another advantage of the partition is that, because pressure medium is kept away from the negative pressure / vacuum in the first chamber, so that outgassing dissolved in the pressure medium moisture and / or air or gas and thus cavitation is avoidable.
  • the partition wall is annular and arranged axially displaceable on the guide pin.
  • the partition in particular during emergency operation, by means of a pressure medium from the memory in the extension direction displaced, in particular together with the piston / rod element.
  • the partition wall is held in its respective position by means of a retaining device and / or a frictional force between the partition wall and the housing.
  • a travel path of the piston / rod element in the extension direction is marked by a cylinder-head-side extension stop on the housing and marked against the extension direction by a cylinder-bottom retraction stop on the housing or a position of the dividing wall.
  • the retaining device may be formed as a spring element, polyurethane being used as the material in particular.
  • the partition by means of a return device, in particular independently of the piston / rod element, against the extension direction displaced.
  • the memory is independent of the piston / rod element, in particular after execution of the emergency operation, charged with pressure medium.
  • the restoring device can be designed as a spring element, wherein a gas filling of the first chamber, in particular with nitrogen, acts as a spring element.
  • the second active surface may be arranged on an annular outer contour of the dividing wall, wherein the second active surface points substantially toward the cylinder base and away from the extension direction.
  • a drain valve is provided in the partition, which, in particular designed as a check valve, is permeable in the direction of the memory and can be flowed via the pressure medium from the first chamber into the second chamber.
  • the restoring device is advantageously designed as a particular consisting of polyurethane spring element.
  • a pressure monitoring device is provided, by means of which a pressure in the memory is monitored.
  • the pressure monitoring device is provided in the high-pressure accumulator and / or in the low-pressure accumulator.
  • an increased leakage safety of the hydraulic cylinder is ensured.
  • the hydraulic system is able to automatically reset itself to an original state and thus delay service.
  • a leakage amount can be returned to the hydraulic circuit.
  • An advantage of the method according to the invention is that it allows the hydraulic system according to the invention to be operated in a simple and effective manner, thus saving costs.
  • the charging operation is carried out after the emergency operation.
  • the memory in particular the high pressure accumulator, after the emergency operation can be recharged with pressure medium. Normal operation can then be performed again.
  • FIG. 1 illustrated first embodiment of the hydraulic system 1 according to the invention includes a hydraulic cylinder 2, which has a special construction according to the invention and can be referred to as differential cylinder in differential construction.
  • a cylindrical guide pin 6 is arranged on an end portion of the housing 4 pointing away from a direction of extension 8, of which a cylinder base 10 is formed.
  • the guide pin 6 is here formed integrally with the housing 4, alternatively it may be firmly connected to the housing 4.
  • a hollow cylinder-shaped piston / rod member 12 is mounted axially displaceable.
  • a first working space 14 is bounded by the guide pin 6 and the piston / rod element 12.
  • a second working space 16 is bounded by the guide pin 6 and the piston / rod element 12 and the housing 2.
  • a third working space 18 is bounded by the piston / rod element 12 and the housing 4.
  • the piston / rod element 12 protrudes in the illustrated Position with a closed end portion 20 of a substantially in the extension direction 8 facing end portion of the housing 4, of which a cylinder head 22 is formed.
  • a first flow path 24 extends to a pressure medium source 26.
  • the pressure medium source 26 is formed as a pump unit, which is a drive 28, here a variable speed and reversible controllable electric motor, and a hydraulic machine 30, which is designed here as a hydraulic pump is. Fluidically parallel to the hydraulic machine 30, a low-pressure accumulator 32 is connected, from which the hydraulic machine 30 via each one designed as a check valve Nachsaugventil 34 pressure medium can vacuum.
  • a storage flow path 36 up to a high-pressure accumulator designed memory 38.
  • From the storage flow path 36 leads a branch 39 to a second flow path 40, which extends from the hydraulic machine 30 to a third working space 18.
  • a check valve 41 is arranged, which blocks in the direction towards the second flow path 40.
  • a storage switching valve 40 is disposed between the second working chamber 16 and the memory 38, here a 2/2-way valve, which is normally open. Between the second working space 16 and the storage switching valve 42, an intermediate branch 44 of the storage flow path 36 can be fluidically connected to the first flow path 24 via a charging valve 46.
  • the charging valve 46 is designed here as a normally closed 2/2-way valve.
  • a first active surface 48 is arranged on a closed end section 20 on an inner contour of the piston / rod element 12.
  • the first active surface 48 points substantially toward the cylinder bottom 10 and away from the extension direction 8.
  • the second active surface 50 is arranged on an outer contour of the piston / rod element 12 which is designed here as an annular radial collar, wherein the second active surface 50 points essentially toward the cylinder base 10 and away from the extension direction 8.
  • the Radial collar is disposed at an open end portion 51 of the piston / rod member 12.
  • a third active surface 52 is arranged on the outer contour of the piston / rod element 12, which is embodied here as an annular radial collar, the third active surface 52 pointing essentially toward the cylinder head 22 and towards the extension direction 8.
  • the memory switching valve 42 is de-energized and thus open, whereby the second active surface 50 is acted upon by pressure medium from the memory 38 and the piston / rod member 12 is moved in its extension direction 8. If the storage switching valve 42 is switched off during normal operation, the second active surface 50 is acted upon in addition to the first active surface 48 with pressure medium - the first active surface 48, as described above, with pressure medium from the pressure medium source 26 and the hydraulic machine 30. In a power failure, which has a failure of the drive 28, for example, the electric motor, the result, the memory switching valve 42 is thereby quasi automatically de-energized and only the second active surface 50 with pressure medium from the memory 38 is applied. Thus, in emergency operation, the hydraulic cylinder 2 is also adjustable without the drive 28.
  • a charging operation must be performed to recharge the reservoir 38 with pressure medium and to promote pressure medium from the second working chamber 16 back into the hydraulic circuit.
  • the memory switching valve 42 is energized and is thus closed and the charging valve 46 energized and is thus open.
  • pressure medium from the hydraulic machine 30 via the second flow path 40 in the third working space 18 is promoted.
  • pressure medium from the first working chamber 14 and pressure medium from the second working chamber 16 is conveyed back into the hydraulic circuit, wherein pressure medium from the second working space 16 in the intermediate branch 44 from the storage flow path 36 via the open charging valve 46 in the first flow path 24 and towards the low pressure side the hydraulic machine 30 is promoted.
  • Pressure fluid from the first working chamber 14 is conveyed via the first flow path 24 toward the low-pressure side of the hydraulic machine 30.
  • pressure medium is conveyed via the branch 39 and the flow-through in the flow direction check valve 41 into the memory 38 and the memory 38 thus recharged. Normal operation can then be performed again.
  • FIG. 2 shows a second embodiment of the hydraulic system according to the invention in normal operation.
  • the hydraulic cylinder 2 of the second embodiment has a partition wall 54 in the second working space 16, whereby it is divided into a first chamber 56 arranged adjacently to the open end section 51 and a second chamber 58 arranged adjacently to the cylinder bottom 10.
  • a travel of the piston / rod member 12 in the extension direction 8 is marked in normal operation by a cylinder head side extension stop on the housing 4 and marked against the extension direction 8 of a position of the partition 54.
  • the partition 54 is in an intermediate position between the cylinder head side extension stop on the housing 4 and a cylinder bottom side retraction stop on the housing 4 and separated in the second chamber 58 pressure fluid effectively from the force acting in the first chamber 56 negative pressure / vacuum.
  • partition wall 54 designed as a check valve drain valve 60 is provided, which is permeable in the direction of the memory 38 out and on the pressure medium from the first chamber 56 into the second chamber 58 can be flowed.
  • FIG. 3 shows that too FIG. 2 described second embodiment of the hydraulic system according to the invention in emergency operation.
  • FIG. 1 described emergency operation here the formed on an annular outer contour of the partition 54 second active surface 50 is acted upon with pressure medium from the memory 38 to move the piston / rod member 12 in the extension direction 8 with power amplification.
  • the partition wall 54 shifts axially on the guide pin 6 until it rests against the piston / rod element 12 or at its annular radial collar, as in FIG. 3 shown.
  • the partition wall 54 is then moved together with the piston / rod element 12 in the extension direction 8 until the piston / rod element 12 bears against the housing 4 on the cylinder head side extension stop.
  • FIG. 4 shows that too FIG. 2 described second embodiment of the hydraulic system according to the invention in the charging mode.
  • a hydraulic system with a special hydraulic cylinder in particular a differential cylinder in differential construction, which has three separate tikstoffbeetzwegbare active surfaces. Operable in normal operation with a Gleichgangs characterizing, developed the hydraulic cylinder in emergency operation, a differential characteristic. This is advantageous when using the hydraulic system according to the invention, for example in a wind power plant for the hydraulic pitch adjustment of a rotor or its rotor blades.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
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Claims (12)

  1. Système hydraulique comprenant un cylindre hydraulique (2) qui présente au moins deux surfaces actives séparées (48, 50, 52) pouvant être sollicitées par du fluide sous pression, une première surface active (48) et une deuxième surface active (50) pouvant être sollicitées avec du fluide sous pression en vue d'un déplacement d'un élément de piston/tige (12) du cylindre hydraulique (2) dans sa direction de sortie (8), une soupape de mise en circuit d'accumulateur (42) étant prévue, au moyen de laquelle la deuxième surface active (50) peut être sollicitée dans la direction de sortie (8) avec un fluide sous pression d'un accumulateur chargé (38), et une soupape de charge (46) étant prévue, au moyen de laquelle un premier espace de travail (14) du cylindre hydraulique (2), limité par la première surface active (48), peut être raccordé fluidiquement à un deuxième espace de travail (16) du cylindre hydraulique (2), limité par la deuxième surface active (50), et une machine hydraulique (30) étant prévue, au moyen de laquelle la première surface active (48) ou une troisième surface active (52) du cylindre hydraulique (2) peut être sollicitée avec un fluide sous pression dans un circuit hydraulique fermé, la troisième surface active (52) pouvant être sollicitée avec du fluide sous pression en vue d'un déplacement de l'élément de piston/tige (12) dans la direction opposée à la direction de sortie (8), et la soupape de mise en circuit d'accumulateur (42) étant raccordée dans un chemin d'écoulement d'accumulateur (36) entre l'accumulateur (38) et le deuxième espace de travail (16), et la soupape de charge (46) étant raccordée dans une branche intermédiaire (44) du chemin d'écoulement d'accumulateur (36) entre la soupape de mise en circuit d'accumulateur (42) et le deuxième espace de travail (16), et la branche intermédiaire (44) entre le premier espace de travail (14) et la machine hydraulique (30) étant raccordée fluidiquement à un premier chemin d'écoulement (24), et s'étendant depuis le deuxième espace de travail (16) du chemin d'écoulement d'accumulateur (36) jusqu'à l'accumulateur (38) réalisé sous forme d'accumulateur haute pression, et une branche (39) conduisant depuis le chemin d'écoulement d'accumulateur (36) jusqu'à un deuxième chemin d'écoulement (40) qui s'étend depuis la machine hydraulique (30) jusqu'à un troisième espace de travail (18) limité par la troisième surface active (52), et un clapet antiretour (41) étant disposé dans la branche (39), lequel est fermé dans la direction allant vers le deuxième chemin d'écoulement (40).
  2. Système hydraulique selon la revendication 1, dans lequel, une dépression peut être produite dans le deuxième espace de travail (16) pendant un fonctionnement normal.
  3. Système hydraulique selon la revendication 1 ou 2, dans lequel aucun fluide sous pression ne peut s'écouler dans le deuxième espace de travail (16) pendant un fonctionnement normal du cylindre hydraulique (2).
  4. Système hydraulique selon l'une quelconque des revendications 1 à 3, dans lequel le cylindre hydraulique (2) présente dans son boîtier (4) un tourillon de guidage (6) sur lequel l'élément de piston/tige (12) peut être déplacé axialement, le premier espace de travail (14) étant limité par le tourillon de guidage (6) et l'élément de piston/tige (12), et le deuxième espace de travail (16) étant limité par le tourillon de guidage (6) et l'élément de piston/tige (12) et le boîtier (4), et un troisième espace de travail (18) étant limité par l'élément de piston/tige (12) et le boîtier (4).
  5. Système hydraulique selon l'une quelconque des revendications 1 à 4, dans lequel la soupape de mise en circuit d'accumulateur (42) est ouverte lorsqu'elle n'est pas alimentée en courant.
  6. Système hydraulique selon l'une quelconque des revendications précédentes 1 à 5, dans lequel le deuxième espace de travail (16) est divisé en deux chambres (56, 58) au moyen d'une paroi de séparation (54) réalisée de manière étanche aux fluides.
  7. Système hydraulique selon la revendication 6, dans lequel la paroi de séparation (54) est réalisée sous forme annulaire et est disposée de manière déplaçable axialement sur le tourillon de guidage (6), et dans lequel la paroi de séparation (54) peut être déplacée au moyen d'une sollicitation avec du fluide sous pression depuis l'accumulateur (38) dans la direction de sortie (8), ou peut être déplacée dans la direction opposée à la direction de sortie, de manière directe ou indirecte, au moyen d'une sollicitation avec du fluide sous pression de la troisième surface active (52) par le biais de l'élément de piston/tige (12).
  8. Système hydraulique selon la revendication 6 ou 7, dans lequel la paroi de séparation (54) peut être déplacée dans la direction opposée à la direction de sortie (8) au moyen d'un dispositif de rappel.
  9. Système hydraulique selon la revendication l'une quelconque des revendications 6 à 8, dans lequel il est prévu dans la paroi de séparation (54) une soupape d'écoulement (60) qui permet le passage dans la direction de l'accumulateur (38).
  10. Système hydraulique selon la revendication 8 ou 9, dans lequel le dispositif de rappel est disposé dans la première chambre (56) et est réalisé sous forme de remplissage de gaz ou sous forme d'élément de ressort essentiellement constitué de polyuréthane.
  11. Système hydraulique selon l'une quelconque des revendications 1 à 10, dans lequel la deuxième surface active (50), en fonctionnement d'urgence, peut être sollicitée avec du fluide sous pression de l'accumulateur chargé (38) dans la direction de sortie (8).
  12. Procédé pour faire fonctionner le système hydraulique selon l'une quelconque des revendications 1 à 11, caractérisé par les étapes suivantes :
    fermeture et/ou maintien fermé de la soupape de mise en circuit d'accumulateur (42) et fermeture et/ou maintien fermé de la soupape de charge (46) pour réaliser le fonctionnement normal en vue du déplacement de l'élément de piston/tige (12) dans la direction de sortie (8) ou dans la direction opposée,
    ouverture et/ou maintien ouvert de la soupape de mise en circuit d'accumulateur (42) et fermeture et/ou maintien fermé de la soupape de charge (46) pour réaliser un fonctionnement d'urgence en vue du déplacement de l'élément de piston/tige (12) dans la direction de sortie (8), et/ou
    fermeture et/ou maintien fermé de la soupape de mise en circuit d'accumulateur (42) et ouverture et/ou maintien ouvert d'une soupape de charge (46) pour réaliser une réinitialisation du système hydraulique après la réalisation du fonctionnement d'urgence avec charge de l'accumulateur (38).
EP16169921.0A 2015-06-25 2016-05-17 Systeme hydraulique destine a l'alimentation en fluide sous pression d'un verin hydraulique comprenant trois surfaces actives separees alimentees en fluide sous pression et procede de fonctionnement dudit systeme hydraulique Not-in-force EP3109485B1 (fr)

Applications Claiming Priority (1)

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DE102015211796.0A DE102015211796A1 (de) 2015-06-25 2015-06-25 Hydraulisches System zur Druckmittelversorgung eines Hydrozylinders mit drei getrennten druckmittelbeaufschlagbaren Wirkflächen und Verfahren zum Betreiben des hydraulischen Systems

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EP3109485B1 true EP3109485B1 (fr) 2019-03-27

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EP (1) EP3109485B1 (fr)
CN (1) CN106286437A (fr)
DE (1) DE102015211796A1 (fr)
DK (1) DK3109485T3 (fr)
ES (1) ES2732624T3 (fr)

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Publication number Priority date Publication date Assignee Title
DE102019105449A1 (de) * 2019-03-04 2020-09-10 Wacker Neuson Linz Gmbh Linearantrieb mit geschlossenem Hydraulikkreislauf
DE102021200096A1 (de) * 2021-01-08 2022-07-14 Robert Bosch Gesellschaft mit beschränkter Haftung Hydraulische Antriebseinheit für eine Presse

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Publication number Priority date Publication date Assignee Title
US3669151A (en) * 1969-11-25 1972-06-13 Kiddle Walter & Co Inc Hydraulic system accumulator arrangement
DE102007050350A1 (de) * 2007-09-21 2009-04-02 Thomas Sauer Hydraulikzylinder mit Energiespeicher
DE102009052531A1 (de) * 2009-11-11 2011-05-12 Hoerbiger Automatisierungstechnik Holding Gmbh Maschinenpresse
DE102010034610A1 (de) * 2010-08-18 2012-02-23 Robert Bosch Gmbh Hydraulischer Linearantrieb
DE102010053811A1 (de) * 2010-12-08 2012-06-14 Moog Gmbh Störungssicheres Betätigungssystem
DE102012012142A1 (de) * 2012-06-20 2013-12-24 Robert Bosch Gmbh Hydraulische Stelleinrichtung
DE102012013098B4 (de) * 2012-06-30 2014-08-07 Hoerbiger Automatisierungstechnik Holding Gmbh Maschinenpresse

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ES2732624T3 (es) 2019-11-25
EP3109485A1 (fr) 2016-12-28
DE102015211796A1 (de) 2016-12-29
CN106286437A (zh) 2017-01-04
DK3109485T3 (da) 2019-06-24

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