DE19953934A1 - Linear drive for space travel applications has folding bellows connected to actuator, fixed and movable end plates connected to bellows ends, tension spring elements and hydraulic system - Google Patents

Linear drive for space travel applications has folding bellows connected to actuator, fixed and movable end plates connected to bellows ends, tension spring elements and hydraulic system

Info

Publication number
DE19953934A1
DE19953934A1 DE1999153934 DE19953934A DE19953934A1 DE 19953934 A1 DE19953934 A1 DE 19953934A1 DE 1999153934 DE1999153934 DE 1999153934 DE 19953934 A DE19953934 A DE 19953934A DE 19953934 A1 DE19953934 A1 DE 19953934A1
Authority
DE
Germany
Prior art keywords
bellows
actuator
linear drive
hydraulic system
spring elements
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
DE1999153934
Other languages
German (de)
Other versions
DE19953934C2 (en
Inventor
Manfred Schmid
Reiner Barho
Harald Langenbach
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.)
Airbus DS GmbH
Original Assignee
Dornier 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 Dornier GmbH filed Critical Dornier GmbH
Priority to DE1999153934 priority Critical patent/DE19953934C2/en
Publication of DE19953934A1 publication Critical patent/DE19953934A1/en
Application granted granted Critical
Publication of DE19953934C2 publication Critical patent/DE19953934C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
    • F15B9/09—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor with electrical control means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
    • B64G1/00—Cosmonautic vehicles
    • B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
    • B64G1/66—Arrangements or adaptations of apparatus or instruments, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • F15B11/0426—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling the number of pumps or parallel valves switched on
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
    • 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
    • F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm type
    • F15B15/103—Characterised by the construction of the motor unit the motor being of diaphragm type using inflatable bodies that contract when fluid pressure is applied, e.g. pneumatic artificial muscles or McKibben-type actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20592—Combinations of pumps for supplying high and low pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40592—Assemblies of multiple valves with multiple valves in parallel flow paths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
    • 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
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6654—Flow rate control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/765—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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/77—Control of direction of movement of the output member
    • F15B2211/7716—Control of direction of movement of the output member with automatic return

Abstract

The linear drive has a folding bellows (1) connected to an actuator (10), a fixed end plate (12) forming part of the structure (14) connected to one end of the bellows, a movable end plate (16) connected to the other end, tension spring elements (7) attached to both end plates and a hydraulic system that acts on the folding bellows with two pressure containers, two precision needle valves, pressure lines to the bellows and lines from the bellows.

Description

Die Erfindung betrifft hochgenaue Positioniersysteme, z. B. für exterrestrische optische Spiegel. Hochgenaue Positioniersysteme benötigen spielfreie, vibrations­ freie und wartungsfreie Präzisionsantriebe für lineare Bewegungen von maximal ca. 50 mm Hub.The invention relates to highly accurate positioning systems, e.g. B. for extraterrestrial optical mirrors. High-precision positioning systems require backlash-free, vibrations Free and maintenance-free precision drives for linear movements of a maximum of approx. 50 mm stroke.

Aufgabe der Erfindung ist es, einen Präzisions-Linearantrieb mit folgenden Merkma­ len zu schaffen:
The object of the invention is to provide a precision linear drive with the following features:

  • - spielfrei,- free of play,
  • - Wege (je nach Auslegung) ca. 50 mm,- paths (depending on the design) approx. 50 mm,
  • - sehr kleine Geschwindigkeiten möglich (0 bis einige µm/s),- very low speeds possible (0 to a few µm / s),
  • - sehr gute Geschwindigkeitskonstanz,- very good speed constancy,
  • - hohe Stellkräfte.- high actuating forces.

Diese Aufgabe wird erfindungsgemäss durch den Gegenstand des Hauptanspruchs gelöst. Die Unteransprüche betreffen vorteilhafte Ausgestaltungen der Erfindung.This object is achieved by the subject matter of the main claim solved. The subclaims relate to advantageous refinements of the invention.

Die Erfindung wird nachfolgend anhand einer Figur näher erläutert, die einen Linear­ antrieb in Seitenansicht zeigt.The invention is explained in more detail below with reference to a figure which is a linear side view of actuator.

Der erfindungsgemässe Linearantrieb besteht aus einem Metallbalg 1 oder Kunst­ stoffbalg, der mit einer Hydraulikflüssigkeit gefüllt und mittels einer Hydraulikleitung 2 mit einem Präzisionsnadelventil 3 und einem Druckbehälter 4 verbunden ist. Der Druckbehälter ist teilweise mit Flüssigkeit gefüllt, wobei ein Innendruck durch ein über der Flüssigkeit stehendes Gaspolster erzeugt wird. The linear drive according to the invention consists of a metal bellows 1 or plastic bellows, which is filled with a hydraulic fluid and connected by means of a hydraulic line 2 with a precision needle valve 3 and a pressure vessel 4 . The pressure vessel is partially filled with liquid, an internal pressure being generated by a gas cushion above the liquid.

Bei Öffnung des Präzisionsventils 3 strömt Flüssigkeit vom Druckbehälter 4 in den Balg 1, der dadurch eine lineare Stellbewegung in axialer Richtung ausführt. Mittels eines zweiten Ventils 5 kann Flüssigkeit aus dem Balg 1 in einen drucklosen Behälter 6 zurückströmen. Dadurch kann bei gleichzeitiger Öffnung beider Ventile 3, 5 eine differentielle (sehr kleine) Geschwindigkeit am Balg 1 erzeugt werden.When the precision valve 3 is opened , liquid flows from the pressure container 4 into the bellows 1 , which thereby executes a linear actuating movement in the axial direction. By means of a second valve 5 , liquid can flow back from the bellows 1 into an unpressurized container 6 . As a result, a differential (very low) speed can be generated on the bellows 1 when both valves 3 , 5 are opened simultaneously.

Wird das mit Behälter 4 verbundene Ventil 3 geschlossen, wird die Bewegung reversiert, da jetzt die parallel zum Balg 1 geschalteten Federelemente 7 Flüssigkeit aus dem Balg 1 zum Behälter 6 fördern. Um schnelles Vor- oder Zurückstellen des Aktuatorsystems zu initiieren, sind Bypassventile 8 grossen Querschnitts vorgese­ hen, über die der Balg 1 schnell mittels der Behälter 4 oder 6 befüllt oder entleert werden kann. Durch Öffnen des Ventils 9 kann die Flüssigkeit bei Bedarf aus dem Behälter 6 in den Behälter 4 zurückströmen (bei entsprechend eingestellter Druck­ differenz P2 < P1). Der Piezoaktuator 10 dient der Kompensation hochfrequenter Störsignale (z. B. von Rauschsignalen aus der Umgebung).If the valve 3 connected to the container 4 is closed, the movement is reversed since the spring elements 7 connected parallel to the bellows 1 now convey liquid from the bellows 1 to the container 6 . In order to initiate rapid advancement or resetting of the actuator system, bypass valves 8 with a large cross section are provided, via which the bellows 1 can be quickly filled or emptied by means of the containers 4 or 6 . By opening the valve 9 , the liquid can flow back from the container 6 into the container 4 if necessary (with a correspondingly set pressure difference P2 <P1). The piezo actuator 10 is used to compensate for high-frequency interference signals (e.g. noise signals from the environment).

Alternativ kann die lineare Stellbewegung des Balgs 1 auch mittels zweier Mikro­ pumpen (nicht gezeigt) erzeugt werden, die die Ventile 3 und 5 ersetzen. Beide Volumenströme können dann aus einem druckfreien Tank entnommen oder in diesen zurückgeführt werden.Alternatively, the linear actuating movement of the bellows 1 can also be generated by means of two micro pumps (not shown) which replace the valves 3 and 5 . Both volume flows can then be taken from a pressure-free tank or returned to it.

Für die Volumenströme und Bewegungen gilt:
Q in < Q out: Bewegung in Richtung +X
Q in < Q out: Bewegung in Richtung -X
Q in = Q out: keine Bewegung.The following applies to the volume flows and movements:
Q in <Q out: movement towards + X
Q in <Q out: movement in direction -X
Q in = Q out: no movement.

In der Figur ist weiter dargestellt:The figure also shows:

Eine Endplatte 12, die Teil einer Struktur 14 ist. An dieser ortsfesten Endplatte stützt sich ein Ende der Federelemente 7 ab, während das andere Ende der Federele­ mente mit einer beweglichen Endplatte 16 in Verbindung steht.An end plate 12 that is part of a structure 14 . At this fixed end plate, one end of the spring elements 7 is supported , while the other end of the Federele elements with a movable end plate 16 is in communication.

Zur Geradführung der Platte 16 sind ölgeschmierte hermetisch abgedichtete Gleitla­ ger 18 vorgesehen, die auf Stangen 20 laufen, wobei die Stangen 20 an der Struktur 14 befestigt sind. Die hermetische Abdichtung der Gleitlager 16 erfolgt mittels der Faltenbalge 22.For straight guidance of the plate 16 , oil-lubricated hermetically sealed Gleitla ger 18 are provided, which run on rods 20 , the rods 20 being attached to the structure 14 . The slide bearings 16 are hermetically sealed by means of the bellows 22 .

Gesteuert wird das System mittels einer Steuerung über elektrische Leitungen, die nachfolgend erläutert werden:
Leitung (Kabel) 26 verbindet die Steuerung mit P1 und Druckbehälter 4,
Leitung (Kabel) 28 verbindet die Steuerung mit P2 und Behälter 6,
Leitung (Kabel) 30 verbindet die Steuerung mit dem Präzisionsnadelventil 3,
Leitung (Kabel) 32 verbindet die Steuerung mit dem Präzisionsnadelventil 5,
die elektrischen Leitungen 24, 36 verbinden die Steuerung mit dem Piezo-Aktuator 10 und die elektrische Leitung 38 verbindet die Steuerung mit einer Laser- Messeinrichtung 40.The system is controlled by means of a control via electrical lines, which are explained below:
Line (cable) 26 connects the control with P1 and pressure vessel 4 ,
Line (cable) 28 connects the control with P2 and container 6 ,
Line (cable) 30 connects the control with the precision needle valve 3 ,
Line (cable) 32 connects the control with the precision needle valve 5 ,
the electrical lines 24 , 36 connect the control to the piezo actuator 10 and the electrical line 38 connects the control to a laser measuring device 40 .

Claims (3)

1. Linearantrieb zur hochgenauen Positionierung optischer Geräte oder dergleichen, insbesondere für Anwendungen in der Raumfahrt, gekennzeichnet durch:
  • - einen Faltenbalg (1), der mit einem Aktuator (10) verbunden ist.
  • - eine ortsfeste Endplatte (12), die ein Teil der Struktur (14) ist und mit einem Ende des Faltenbalgs (1) verbunden ist.
  • - eine bewegliche Endplatte (16), die mit dem anderen Ende des Faltenbalgs (1) verbunden ist.
  • - Zugfederelemente (7), die an beiden Endplatten (12; 16) befestigt sind.
  • - ein Hydrauliksystem, das den Faltenbalg beaufschlagt.
1. Linear drive for high-precision positioning of optical devices or the like, in particular for applications in space travel, characterized by :
  • - A bellows ( 1 ) which is connected to an actuator ( 10 ).
  • - A stationary end plate ( 12 ) which is part of the structure ( 14 ) and is connected to one end of the bellows ( 1 ).
  • - A movable end plate ( 16 ) which is connected to the other end of the bellows ( 1 ).
  • - Tension spring elements ( 7 ) which are attached to both end plates ( 12 ; 16 ).
  • - A hydraulic system that acts on the bellows.
2. Linearantrieb nach Anspruch 1, dadurch gekennzeichnet, dass das Hydraulik­ system aus folgenden Bauteilen besteht:
  • - einem ersten Druckbehälter (4),
  • - einem Präzisionsnadelventil (3),
  • - Druckleitungen zum Faltenbalg (2),
  • - Leitungen vom Faltenbalg (2),
  • - einen zweiten Präzisionsventil (5) und
  • - einem zweiten Behälter (6) für Hydraulikmittel.
2. Linear drive according to claim 1, characterized in that the hydraulic system consists of the following components:
  • - a first pressure vessel ( 4 ),
  • - a precision needle valve ( 3 ),
  • - pressure lines to the bellows ( 2 ),
  • - pipes from the bellows ( 2 ),
  • - A second precision valve ( 5 ) and
  • - A second container ( 6 ) for hydraulic fluid.
3. Linearantrieb nach Ansprüchen 1 und 2, gekennzeichnet durch je ein Bypass­ ventil (8), das jedem Präzisionsventil (3; 5) zugeordnet ist.3. Linear actuator according to claims 1 and 2, characterized by a bypass valve ( 8 ) which is assigned to each precision valve ( 3 ; 5 ).
DE1999153934 1999-11-10 1999-11-10 Linear actuator for space applications Expired - Fee Related DE19953934C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1999153934 DE19953934C2 (en) 1999-11-10 1999-11-10 Linear actuator for space applications

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1999153934 DE19953934C2 (en) 1999-11-10 1999-11-10 Linear actuator for space applications

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DE19953934A1 true DE19953934A1 (en) 2001-06-28
DE19953934C2 DE19953934C2 (en) 2002-03-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116816768A (en) * 2023-08-10 2023-09-29 中国科学院空间应用工程与技术中心 Long-life fluid drive assembly with space capable of being rapidly disassembled

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4027899A1 (en) * 1990-09-03 1992-03-12 Gerhard Prof Dr Ing Wendt Hydraulic servo for linear drive of piston - functions dependent on position of control unit formed as rocker
DE4136119A1 (en) * 1991-11-02 1993-05-06 Erno Raumfahrttechnik Gmbh, 2800 Bremen, De LINEAR ACTUATOR
DE4244643A1 (en) * 1991-11-27 1993-11-25 Ortmann Albert Damping device for actuation of space vehicle equipment - has oil-filled housing sealed by expansion bellows or by sealing membrane
DE68922968T2 (en) * 1988-09-08 1996-03-21 Selenia Spazio Spa Linear drive for antenna alignment, especially for space applications.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68922968T2 (en) * 1988-09-08 1996-03-21 Selenia Spazio Spa Linear drive for antenna alignment, especially for space applications.
DE4027899A1 (en) * 1990-09-03 1992-03-12 Gerhard Prof Dr Ing Wendt Hydraulic servo for linear drive of piston - functions dependent on position of control unit formed as rocker
DE4136119A1 (en) * 1991-11-02 1993-05-06 Erno Raumfahrttechnik Gmbh, 2800 Bremen, De LINEAR ACTUATOR
DE4244643A1 (en) * 1991-11-27 1993-11-25 Ortmann Albert Damping device for actuation of space vehicle equipment - has oil-filled housing sealed by expansion bellows or by sealing membrane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116816768A (en) * 2023-08-10 2023-09-29 中国科学院空间应用工程与技术中心 Long-life fluid drive assembly with space capable of being rapidly disassembled
CN116816768B (en) * 2023-08-10 2024-05-07 中国科学院空间应用工程与技术中心 Long-life fluid drive assembly with space capable of being rapidly disassembled

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Publication number Publication date
DE19953934C2 (en) 2002-03-21

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