EP3536976A1 - Actionneur avec accumulateur - Google Patents

Actionneur avec accumulateur Download PDF

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Publication number
EP3536976A1
EP3536976A1 EP18160844.9A EP18160844A EP3536976A1 EP 3536976 A1 EP3536976 A1 EP 3536976A1 EP 18160844 A EP18160844 A EP 18160844A EP 3536976 A1 EP3536976 A1 EP 3536976A1
Authority
EP
European Patent Office
Prior art keywords
energy
hydraulic fluid
actuator
chamber
storage
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.)
Granted
Application number
EP18160844.9A
Other languages
German (de)
English (en)
Other versions
EP3536976B1 (fr
Inventor
Georg Bachmaier
Patrick Fröse
Wolfgang Zöls
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.)
Metismotion GmbH
Original Assignee
Metismotion GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Metismotion GmbH filed Critical Metismotion GmbH
Priority to EP18160844.9A priority Critical patent/EP3536976B1/fr
Priority to DK18160844.9T priority patent/DK3536976T3/da
Publication of EP3536976A1 publication Critical patent/EP3536976A1/fr
Application granted granted Critical
Publication of EP3536976B1 publication Critical patent/EP3536976B1/fr
Active 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
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/202—Externally-operated valves mounted in or on the actuator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3152—Accumulator separating means having flexible separating means the flexible separating means being bladders
    • 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
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows
    • 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
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/625—Accumulators

Definitions

  • the invention relates to a memory actuator and a method for operating a memory actuator.
  • an actuator is understood to mean a device or device which converts electrical signals into mechanical motion or some other physical quantity and thus performs work.
  • actuator concepts such as hydraulic or pneumatic actuators.
  • solid state actuators and polymer actuators One form of solid state actuator is the piezoelectric actuator in which a directional deformation of a piezoelectric material (short: piezo) is utilized to perform work. If a piezoactuator is combined with a hydraulic system, a so-called piezohydraulic actuator is obtained.
  • the power provided by the actuator in particular mechanical, power essentially depends on the product of force and speed.
  • This product results in a characteristic characterizing the actuator of the actuator. If more power is required in an application than the actuator can provide, a larger variant of the actuator is usually frequently used, for example. For example, in the case of piezo actuators, this can be a version with a larger volume, for example the drive. However, a simple enlargement of the actuator can lead to high costs. In addition, the space required for the corresponding actuator grows, which is undesirable or unrealizable in some applications, such as in special medical applications. As an alternative to larger actuator versions, it is also possible to use actuators which have a different actuator concept. However, this is often not possible because desired efficiencies and thus Services can not be realized by an alternative actuator concept.
  • Object of the present invention is therefore to provide a memory actuator and a method for operating such a memory actuator, the output device is operable with a particularly large power.
  • a first aspect of the invention relates to a memory actuator for actuating a power take-off device, with at least one energy store and with a drive device.
  • energy can be stored in the energy store in at least one first operating state of the memory actuator.
  • the memory actuator has at least one second operating state in which at least part of the energy stored in the energy store can be provided by the energy store, as a result of which the output device can be supplied with the provided energy and thereby actuated.
  • the first operating state may be referred to as a storage state.
  • the second operating state may be referred to as AktuierPark.
  • the output device is operable with a particularly large power.
  • the output device is preferably a mechanical output device.
  • At least one reservoir is provided for providing a hydraulic fluid.
  • the hydraulic fluid can be conveyed into the energy store in the first operating state by means of the drive device, whereby the energy can be stored in the energy store in the second operating state, at least part of the hydraulic fluid stored in the energy store and thereby at least the part of the energy store stored in the energy store Provides energy, whereby the output device is actuated by means of the provided hydraulic fluid.
  • the components may be a weight, which is raised to a storage position, wherein the kinetic energy is converted into potential energy, so potentially energy.
  • the component may comprise at least one, in particular elastic, deformable element and / or a compressible fluid, wherein the element is deformed and / or the fluid is compressed, the hydraulic fluid is introduced into the energy store.
  • the component stores energy, which is transmitted by means of the hydraulic fluid.
  • energy is stored by means of the energy storage.
  • the energy storage can store the energy.
  • the energy can also be converted into pressure and / or deformation energy instead of in position energy, for example by deforming and / or compressing the component.
  • the stored energy in particular back into or on the hydraulic fluid, can be released again.
  • the hydraulic fluid energy can be stored, in particular in the form of pressure energy, so that energy can be stored in the energy store by means of the hydraulic fluid.
  • the energy store can be filled particularly easily with energy, so that the output device can be operated particularly advantageously with a particularly high power.
  • the memory actuator according to the invention comprises at least the drive device having a drive device for conveying the hydraulic fluid.
  • the memory actuator comprises the energy store for storing hydraulic fluid or energy that can be transmitted by the hydraulic fluid.
  • the, in particular hydraulic, storage actuator comprises a chamber with a piston element arranged movably in the chamber, which subdivides the chamber in a first chamber region, in which the hydraulic fluid can be conveyed by means of the drive device, and a second chamber region. The piston element can be moved from a first position to a second position by or by means of conveying the hydraulic fluid into the first chamber area.
  • the piston element In the second position, the piston element releases a first flow-through opening and obstructs a second flow-through opening, so that the hydraulic fluid delivered into the first chamber region can be introduced from the first chamber region into the energy store via the first flow-through opening.
  • the memory actuator according to the invention comprises at least one restoring device, by means of which the piston element is movable from the second position to the first position, in which the piston element releases the second flow-through opening and blocks the first flow-through opening, so that at least a part of the hydraulic fluid introduced into the energy store emerges from the first Energy storage via the second flow opening in the second chamber area can be introduced.
  • the storage actuator has an output device which is connected to at least part of the hydraulic fluid introduced into the second chamber region can be supplied and thus drivable.
  • the first position in which the piston element can be located can also be referred to as the actuation position and characterizes an actuation phase or the actuation state of the entire memory actuator.
  • the second position can also be referred to as a storage position in which the storage actuator, in particular its drive actuator comprehensive drive device, mechanical energy provides, by means of which the hydraulic fluid is supplied to the energy storage, so that by means of the hydraulic fluid energy is stored in the energy storage. If the piston element is in the storage position, then the actuator, in particular the piston element, is in the storage state or the first operating state.
  • the piston element according to the invention which subdivides the chamber into a first chamber region and a second chamber region, makes it possible to store a particularly large, predefinable amount of energy through the ingestible first position and ingestible second position and a corresponding amount in the form of power to provide or deliver to the output device of the memory actuator.
  • the memory actuator operates quasi in two phases, and this at least knows the two mentioned operating conditions: The memory state during which the piston element is in the second position or storage position, and the AktuierDirect, during which the piston element is in the first position or Aktuier too ,
  • the memory actuator according to the invention is particularly suitable for applications in which a trip time of the memory actuator plays a secondary role in which, however, a particularly large power is desired with constant force and speed over the entire Aktu réellesphase on the output device.
  • the period during which the actuation takes place ie the duration of the actuation phase, the actuation time, that is, the time during which a position or movement takes place on the output device.
  • the tripping time is the time that elapses from the first actuation of the drive actuator or its switching on until the beginning of the actuation.
  • the beginning of the actuation is the starting of a movement on the output device.
  • the energy provided by the drive device or the at least one drive actuator in particular mechanical, energy, for example in the form of hydraulic energy stored in the, in particular hydraulic, energy storage.
  • the hydraulic fluid is conveyed or moved by means of the drive actuator into the first chamber region of the chamber.
  • the piston element If the piston element is initially in the first position, and if the hydraulic fluid is conveyed to or into the first chamber area by means of the drive actuator, then the piston element is moved from the first position to the second position. In this case, the piston element releases the first flow-through opening, which leads at least indirectly from the first chamber region to the energy store designed to store the hydraulic fluid. As a result, the hydraulic fluid can flow from the first chamber area into the energy store. By releasing the first flow-through opening, it is thus possible to store the hydraulic fluid or the energy contained in the hydraulic fluid in the energy store, in particular by means of an introduction of the hydraulic fluid into the energy store. In this case, the energy contained in the hydraulic fluid, in particular by pressurization of the hydraulic fluid with a pressure, by means of which in particular mechanical work, in particular on the output device, causes or can be performed.
  • the piston element can move from the second position into the first position by means of the return device first position to be moved.
  • the second flow opening is released and the first flow opening blocked.
  • no hydraulic fluid can flow or flow from the energy store back into the first chamber area.
  • the hydraulic fluid can now flow from the energy store into the second chamber area, or the hydraulic fluid can be introduced or conveyed into it.
  • the hydraulic fluid introduced or pumped in via the second flow-through opening into the second chamber area or a part of this hydraulic fluid can be further directed or conveyed into the output device.
  • the output device with at least a portion of the hydraulic fluid can be supplied and driven by them, so that the memory actuator can perform mechanical work on the output device and thus at its output.
  • the memory actuator is particularly suitable for applications in which the triggering time plays a secondary role. Therefore, the storage phase or the memory state is not time-critical, which can be ensured to a particularly large extent that the energy storage can be filled with sufficient energy to provide the required power for the AktuierPark, or the Aktu réelle itself.
  • the memory actuator according to the invention can be designed such that it has a particularly high power density, which can represent a boundary condition for operating the memory actuator. In this case, the required power density of alternative actuator concepts often also not be provided.
  • the force density can be understood as the ratio of the volume of the output device that can be filled with hydraulic fluid relative to the entire volume of the storage actuator, that is to say a totality of all components that can be filled with hydraulic fluid, such as, for example, the chamber and the energy store.
  • the memory unit of the actuator is implemented or embodied such that the power stored in it in the form of energy, in particular due to the storage position of the piston element, is not released during the storage of the energy provided by the drive device.
  • the energy storage sufficiently filled with hydraulic fluid, so for example, in the energy storage a predetermined or desired and thus sufficient amount of energy is stored, which is sufficient for example for an actuation of the output device, so for example, caused by the drive device promotion of the hydraulic fluid to the or finished in the first chamber area.
  • the piston element in particular automatically releases the stored energy in the energy storage, in particular by the fact that the piston element is moved from the second position to the first position by means of the return device.
  • the release of energy is thus passive, that is without further action, for example, a user and / or the drive device of the memory actuator.
  • the memory actuator according to the invention can deliver particularly constant output parameters, in particular at force and / or speed, during the actuation phase, in particular if a certain amount of energy is already contained in the energy store before the storage state preceding the actuation phase. That is, the storage actuator is filled with hydraulic fluid or with a corresponding amount of hydraulic fluid, so that during the storage process only so much volume of the hydraulic fluid must be pumped into the energy storage to ensure a required stroke AS of the output or the output device. In this case, the amount of hydraulic fluid required or the volume of the required hydraulic fluid ⁇ V depends on the product of ⁇ S and an output cross-section A of the output device.
  • the energy can advantageously be stored and released only when sufficient, available amount selbiger. Another advantage is that the energy is released automatically and without a separate trip unit, so in a passive way.
  • the actual drive actuator can provide little actual power to the drive device, which costs can be kept very low.
  • space can be saved by the memory actuator according to the invention.
  • a particularly high, realizable Energy density generated with the memory actuator and this can be integrated particularly advantageous in possible application scenarios.
  • the memory actuator can be designed to be able to provide a particularly large mechanical power.
  • the drive actuator is designed as a solid-state actuator, in particular as a piezoelectric actuator, and / or polymer actuator.
  • an actuator concept of the drive device can be selected from a variety of actuator concepts.
  • Solid and polymer actuators are often in common that they have a travel or travel, which is particularly short, so that certain applications are not feasible with these actuator concepts.
  • a piezocator the travel is limited by a maximum deformability of the piezos.
  • a piezoactuator can provide a particularly large force density.
  • an application range of, for example, solid state actuators, such as the piezoactuator can advantageously be increased.
  • a combination of power density and power can be designed particularly advantageous.
  • the memory actuator according to the invention can thus be designed, in particular, as a piezohydraulic memory actuator.
  • the memory actuator has a check valve arranged in the first flow-through opening, which block in the direction of the first chamber area.
  • the drive device comprises a drive chamber which can be supplied with the hydraulic fluid and a drive piston element which partially limits the drive chamber and can be driven by the drive actuator, by means of which the hydraulic fluid from the drive chamber is driven into the first chamber region and via the first chamber region and by driving the drive piston element first flow opening in the energy storage is to promote.
  • the drive piston element is driven by means of the drive actuator and thereby moved, at least part of the hydraulic fluid initially received in the drive chamber is conveyed out of the drive chamber by means of the drive piston element.
  • the drive device has a hydraulic cylinder formed at least partially by the drive chamber and the drive piston element, which acts as a so-called work cylinder.
  • the energy from the hydraulic fluid is converted into a particularly easily controllable or manageable, acting force by means of which the energy storage can be filled particularly advantageous with energy or hydraulic fluid.
  • a particularly simple and thus low-maintenance drive device can be realized.
  • the drive piston element performs strokes caused by the drive actuator for conveying the hydraulic fluid at a frequency of less than 10,000 hertz, in particular less than 1,000 hertz.
  • the output device has a driven chamber into which the hydraulic fluid can be introduced, and a driven piston partially limiting the output piston element, which has an acted upon by the introduced into the output chamber hydraulic fluid output surface.
  • the output piston element is driven.
  • the output piston element and the output chamber at least partially form a hydraulic cylinder, which particularly advantageously converts or uses the hydraulic fluid stored in the energy store to operate the actuator, whereby, for example, a desired output speed and / or a desired output force are particularly advantageously provided by the memory actuator can.
  • the output piston element has a hydraulically effective output surface, which can be acted upon by the hydraulic fluid introduced into the output chamber.
  • the output piston element By applying this to the output surface with the hydraulic fluid introduced into the output chamber during the actuation state, the output piston element can be driven and thus, in particular translationally, moved.
  • the output piston element By the described design of the output device, for example, a lot of power at the output or the output piston element can be made available.
  • the restoring device has at least one spring, which is stretched in the second position stronger than in the first position and thereby at least in the second position provides a spring force or restoring force, by means of which the piston member from the second position, the storage position , in the first position, the Aktuier too, is movable.
  • the energy storage is designed as a bellows pressure accumulator, which has at least one storage chamber and at least one arranged in the storage chamber bellows, which is elastically compressible by introducing the hydraulic fluid into the storage chamber.
  • the bellows is compressed, in particular elastically, whereby energy can be stored in the memory.
  • AktuierPark in which no hydraulic fluid is conveyed in the energy storage, the compressed in the storage state bellows, so that the energy of the bellows is transferred to the hydraulic fluid to drive the output device relaxes.
  • the energy store which is thus designed as a so-called gas pressure accumulator, for example, have an inner and an outer bellows, which are each formed in particular at least partially made of metal. Furthermore, the bellows can have a, in particular mechanical, stop, by means of which it is prevented that energy is already released during the storage state.
  • a Belg réelle Runds as energy storage of the memory actuator according to the invention, for example, particularly compact and / or be formed particularly inexpensive.
  • Other types of hydraulic and / or gas pressure accumulators may additionally or alternatively be used as energy storage.
  • a second check valve is provided, via which the hydraulic fluid from the drive device can be introduced into the first chamber area.
  • a backflow of hydraulic fluid into the drive device can be prevented in a particularly advantageous manner, whereby charging of the energy storage device can be carried out particularly efficiently.
  • hydraulic fluid can additionally be introduced into the energy store, instead of flowing back into the drive device or flowing.
  • a third check valve is provided, via which the output device can be supplied with the hydraulic fluid from the second chamber area.
  • the third check valve a return flow of the hydraulic fluid from the output device, in particular from the output chamber, is prevented or kept particularly low in the second chamber area, whereby the actuation of the output device can be particularly efficient and, for example, a move back from the Aktuier ein in the storage position the output piston member can be prevented or kept particularly low.
  • the energy storage is within 10 seconds at most, especially within at most one second, during which the piston element is continuously in the second position or the storage position, at least predominantly, in particular completely, filled with the hydraulic fluid. That is, the energy storage device can be at least predominantly, in particular completely, charged with the energy during the memory state, in particular within at most one second in order to operate the output device with the required power during the following Aktuier gleichs.
  • a time interval which takes place with the switching on of the drive actuator for storing the energy until the actual switching over of the memory actuator into the actuation state can, as already mentioned, be understood as a so-called tripping time. That is, the trip time of the memory actuator according to the invention is less than ten or one second and is thus particularly low, resulting in a particularly wide range of applications for a use of the memory actuator according to the invention.
  • a second aspect of the invention relates to a method for actuating an output device by means of a memory actuator, in which in a first operating state of the memory actuator at least one energy storage by means of a drive device of the memory actuator is energized, whereby the energy is stored in the energy storage, wherein in a second Operating state of the memory actuator of the energy storage provides at least a portion of the energy stored in the energy storage, whereby the output device is supplied with the energy provided and thereby actuated by means of the energy provided.
  • the method according to the invention can advantageously be carried out in such a way that an automatic release of the stored energy takes place.
  • the energy can be stored or stored as long as possible, that is to say one or the storage state can be locked until, for example, the energy is released manually.
  • the energy can be stored up to a specific, in particular predeterminable amount of energy. If this amount is reached, for example, an automatic driving of the output device is flown.
  • the memory actuator according to the invention is operated by means of the method according to the invention or the method according to the invention is carried out on the memory actuator according to the invention.
  • Advantages and advantageous embodiments of the first aspect of the invention are to be regarded as advantages and advantageous embodiments of the second aspect of the invention, and vice versa.
  • FIG. 1 shows a schematic sectional view of a memory actuator 10, which has a driven device 32.
  • the output device 32 represents an output of the memory actuator 10.
  • the memory actuator 10 is designed to actuate the output device 32 and comprises at least one energy store 18 and a drive device 14, by means of which energy can be stored in the energy store 18 in at least one first operating state of the memory actuator 10.
  • the memory actuator 10 may have at least one second operating state in which at least part of the energy stored in the energy store 18 can be provided by the energy store 18, as a result of which the output device 32 can be supplied with the provided energy and thereby actuated.
  • the drive device 14 comprises a drive actuator 12.
  • the drive actuator 12 is advantageously embodied as a piezoactuator, for example, it may alternatively be formed by another solid-state actuator and / or as a polymer actuator. In principle, any actuator concepts as drive actuator 12 are possible.
  • the storage actuator 10 comprises a chamber 16 and the energy store 18.
  • a piston member 20 is arranged translationally movable, which divides the chamber 16 into a first chamber portion 22 and a second chamber portion 24.
  • the hydraulic fluid can be conveyed by means of the drive device 14 into the first chamber region 22.
  • At least one, in particular designed as a tank, reservoir 38 is provided for providing the hydraulic fluid, which is in the first operating state by means of the drive device 14 in the energy storage 18 can be conveyed, whereby the energy in the energy storage 18 can be stored.
  • the energy store 18 can provide at least part of the hydraulic fluid stored in the energy store 18 and thereby at least part of the energy stored in the energy store 18, whereby the output device 32 can be actuated by means of the hydraulic fluid provided.
  • the piston element 20 By conveying the hydraulic fluid into the first chamber region 22, the piston element 20 is movable from a first position, which is also referred to as Aktuier ein, in a second position, which is also referred to as storage position.
  • Aktuier ein a first position
  • second position which is also referred to as storage position.
  • the piston element In this case, the piston element is in the first operating state in the storage position and during the second operating state in the Aktuier ein.
  • the first operating state is therefore referred to as memory state and the second operating state as AktuierPark.
  • the piston element 20 releases a first flow-through opening 26 of the memory actuator 10.
  • the piston element 10 obstructs a second throughflow opening 28 of the storage actuator 10, so that in the second position the hydraulic fluid delivered into the first chamber region 22 can be introduced from the first chamber region 22 into the energy store 18 via the first throughflow opening 26 or flows.
  • the memory actuator 10 has at least one restoring device 30, by means of which the piston element 20 can be moved from the second position into the first position, in which the piston element 20 releases the second throughflow opening 28 and obstructs the first throughflow opening 26, so that at least part of the in the energy storage 18 introduced hydraulic fluid from the energy storage 18 via the second flow opening 28 into the second chamber portion 24 can be introduced.
  • the memory actuator 10 includes the output device 32, which is supplied with at least a portion of the introduced into the second chamber portion 24 hydraulic fluid and thereby driven.
  • the chamber 16 and a second chamber 34 of the storage actuator 10, which is fluidically connected to the chamber 16, can be substantially cylindrical.
  • The, in particular hydraulic, storage actuator 10 is, while the piston member 20 is in the storage position, in a first phase (storage phase) or the first operating state, which also referred to as a storage state becomes.
  • the memory actuator 10 in particular its drive device 14, provides mechanical energy which is stored in the energy store 18 by means of the hydraulic fluid.
  • the memory actuator 10 is in a second phase (actuation phase) or the second operating state, which is also referred to as the actuation state.
  • the output device 32 is actuated by means of the energy stored in the energy store 18 and thereby, for example, moved, whereby an actuation can be effected by means of the output device 32.
  • the memory actuator 10 can be operated such that the memory state or the storage of the energy is not time-critical, that is, sufficient energy can be stored to provide the required or required in AktuierPark power for the entire Aktu réellesphase.
  • the memory actuator 10 shown is of interest for applications in which, for example, an increase in the power of an actuator would be associated with excessive costs and alternative actuator concepts, for example, can not achieve the desired power density compared with the drive actuator 12 embodied as a piezoactuator.
  • the drive actuator 12 of the drive device 14 in the embodiment shown pumps the hydraulic fluid via a second check valve 36 from the drive device 14 into the first chamber region 22, so that the hydraulic fluid can be introduced into the first chamber region 22.
  • the drive device 14 has a drive chamber which can be supplied with the hydraulic fluid and a drive piston element which partially limits the drive chamber and can be driven by the drive actuator 12, by means of which the hydraulic fluid from the drive chamber is driven into the first chamber region 24 by driving the drive piston element and the first chamber portion 24 through the first flow opening 26 is to be conveyed into the energy store 18.
  • the drive chamber and the drive piston element are in for clarity FIG. 1 Not shown.
  • the hydraulic fluid may be provided, for example, by the reservoir formed as a reservoir 38, which is in the reverse direction on the same side of the second check valve 36 as the drive device 14.
  • a first check valve 40 is arranged, which blocks in the direction of the first chamber region 24.
  • the hydraulic fluid is pumped or conveyed via the second check valve 36 and via an opening 42 into the first chamber region 22 of the chamber 16 by means of the drive device 14. Due to a low compressibility of the hydraulic fluid, the piston element 20 is pressed against the return device 30, whereby the first flow-through opening 26 and thus the first check valve 40 is released.
  • the return device 30 advantageously has at least one spring 44.
  • the spring 44 is in the second position, that is stretched in the storage position, stronger than in the Aktuier ein, thereby, the spring 44 at least in the storage position provides a spring force by means of which the piston member 20 is movable from the storage position to the Aktuier too.
  • the hydraulic fluid flows via the first check valve 40 at least indirectly into the energy store 18, which is fluidically connected via the chamber 34 and a further opening 46 during the storage state with the first chamber portion 22.
  • the first check valve 40 prevents hydraulic fluid from the second chamber 34 can flow back into the first chamber portion 22. Due to the position of the piston element 20 in the storage position, in particular automatically, the second flow-through opening 28 is blocked, whereby no hydraulic fluid from the second chamber 34 and thus the energy storage 18 can flow into the second chamber region 24. If the hydraulic fluid is not conveyed by means of the drive device 14, the piston element 20 is moved in translation within the first chamber by the restoring force of the spring 44, so that the piston element 20 is displaced from the storage position into the actuation position, in particular translationally.
  • the piston element 20 is designed so that a leakage over the, in particular radial, gap between the piston element 20 and a wall of the chamber 16 is particularly low. That is, a fluidic exchange of the hydraulic fluid between the first chamber portion 22 and the second chamber portion 24 past the piston member 20 is particularly low, in particular negligible.
  • the in FIG. 1 shown energy storage 18 is designed for example as a pneumatic and / or hydraulic storage, that is, the more fluid or hydraulic fluid of the drive actuator 12 pumps via the second check valve 36, the more energy is stored in the energy storage 18.
  • the energy storage device 18 is already filled with sufficient hydraulic fluid before the start of the storage state or contains sufficient energy, so that only so much fluid volume .DELTA.V must be pumped into the energy store 18 or the second chamber 34 in order to ensure a required stroke .DELTA.S of the output device 32 ,
  • the pressure within the hydraulic fluid to be filled components of, in particular hydraulic, Speicheraktors 10, in particular the energy storage 18, reach or apply a certain initial pressure, which is for example above ambient pressure in an environment of the Speicheraktors 10.
  • the output device 32 has an output chamber 48 into which the hydraulic fluid can be introduced. Furthermore, the output device 32, the output chamber 48 partially limiting output piston member 50, which has an acted upon by the introduced into the output chamber 48 hydraulic fluid output surface 52. By applying the output surface 52 with the introduced into the output chamber 48 hydraulic fluid, the output piston member 50 is driven.
  • the memory actuator 10 has a third check valve 54, via which the output device 32 can be supplied with the hydraulic fluid from the second chamber region 24. If the energy storage stops, that is, the drive actuator 12 stops pumping the hydraulic fluid via the check valve 36 in at least the first chamber portion 22, the hydraulic fluid in the connection, after returning the piston member 20 through the return means 30, flow into the output device 32, whereby the Output force and the output speed and thus the power, in particular on the output piston member 50, is provided. In this case, the, in particular translational, movement of the output piston element 50 takes place by applying the hydraulic fluid to the hydraulically effective output surface 52.
  • the drive piston element of the drive device 14 which carries out strokes caused by the drive actuator 12 for conveying the hydraulic fluid, with a frequency of less than 1000 Hertz reciprocable or movable ioloswies, whereby the drive actuator 12 and thus the entire drive device 14, for example, particularly wear thus can be operated with low maintenance.
  • the memory state and thus the storage of energy takes less than a second.
  • the piston member 20 is continuously in the second position, and the energy storage 18 is at least predominantly, in particular completely, filled with the hydraulic fluid during the said time period or can be filled with this.
  • Said period is also referred to as a triggering time, whereby the triggering time of the memory actuator 10 may be less than one second.
  • FIG. 2 shows a schematic sectional view of another embodiment of, in particular piezohydraulic, Speicheraktors 10, the second chamber 34 and the energy storage 18 is designed as a bellows pressure accumulator, which has at least one storage chamber, the second chamber 34, and at least one arranged in the storage chamber bellows 56 which is elastically compressible by introducing the hydraulic fluid into the storage chamber, the second chamber 34.
  • the FIG. 2 shows only one half of the chambers of the Speicheraktors 10, since for reasons of symmetry, in particular by a cylindrical configuration of the chamber 16 and 34 of the embodiment, by a complete sectional view no further information in FIG. 2 could be won.
  • the embodiment shows a mechanical stop 62 of the bellows 56.
  • this stop 62 can be ensured that already a certain energy of the hydraulic fluid can be kept, so that only the fluid volume .DELTA.V in the chamber portion 22 and in the chamber 16 and thus in the energy storage 18 must be introduced, which is required to ensure the required stroke .DELTA.S on the output piston 50, wherein the required volume calculated over the area A of the output surface 52 and the length .DELTA.S of the stroke.
  • the mechanical stop 62 serves not already deliver the already stored energy during the memory state.
  • the stopper 62 can be acted upon by hydraulic fluid such that the pressurization of the bellows 56 compresses or compresses it.
  • the hydraulic fluid by means of the drive device 14, in particular from the reservoir 38 or tank, via the second check valve 36 and the opening 42 in the first chamber portion 22 and further through the flow opening 26 and the first check valve 40 into the chamber 34th and thus is introduced into the energy storage 18, this deforms the bellows 56 there elastic, whereby a storage of energy by means of the hydraulic fluid by compression of the bellows 56 is possible.
  • piezohydraulic, memory actuator 10 in which the energy storage 18 is combined with the drive device 14 and the output device 32 such that the memory actuator 10 by means of two phases, the storage and the Aktu istsphase, is operable, can be a lot of power which the drive actuator 12 itself can not provide, thereby opening up manifold possibilities of using the memory actuator 10.

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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)
  • Reciprocating Pumps (AREA)
EP18160844.9A 2018-03-09 2018-03-09 Actionneur avec accumulateur Active EP3536976B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18160844.9A EP3536976B1 (fr) 2018-03-09 2018-03-09 Actionneur avec accumulateur
DK18160844.9T DK3536976T3 (da) 2018-03-09 2018-03-09 Lageraktuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18160844.9A EP3536976B1 (fr) 2018-03-09 2018-03-09 Actionneur avec accumulateur

Publications (2)

Publication Number Publication Date
EP3536976A1 true EP3536976A1 (fr) 2019-09-11
EP3536976B1 EP3536976B1 (fr) 2020-11-11

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EP (1) EP3536976B1 (fr)
DK (1) DK3536976T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021160289A1 (fr) * 2020-02-14 2021-08-19 Metismotion Gmbh Dispositif actionneur ainsi que procédé pour faire fonctionner un tel dispositif actionneur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6070408A (en) * 1997-11-25 2000-06-06 Caterpillar Inc. Hydraulic apparatus with improved accumulator for reduced pressure pulsation and method of operating the same
EP3045737A1 (fr) * 2015-01-14 2016-07-20 BAE Systems PLC Actionneurs hydrauliques
DE102017205404A1 (de) * 2016-04-01 2017-10-05 Yamada Manufacturing Co., Ltd. Hydraulische steuervorrichtung und hydraulisches steuerungsverfahren

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6070408A (en) * 1997-11-25 2000-06-06 Caterpillar Inc. Hydraulic apparatus with improved accumulator for reduced pressure pulsation and method of operating the same
EP3045737A1 (fr) * 2015-01-14 2016-07-20 BAE Systems PLC Actionneurs hydrauliques
DE102017205404A1 (de) * 2016-04-01 2017-10-05 Yamada Manufacturing Co., Ltd. Hydraulische steuervorrichtung und hydraulisches steuerungsverfahren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021160289A1 (fr) * 2020-02-14 2021-08-19 Metismotion Gmbh Dispositif actionneur ainsi que procédé pour faire fonctionner un tel dispositif actionneur

Also Published As

Publication number Publication date
EP3536976B1 (fr) 2020-11-11
DK3536976T3 (da) 2021-01-25

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