EP0987446A1 - Vérin hydraulique - Google Patents

Vérin hydraulique Download PDF

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Publication number
EP0987446A1
EP0987446A1 EP98117519A EP98117519A EP0987446A1 EP 0987446 A1 EP0987446 A1 EP 0987446A1 EP 98117519 A EP98117519 A EP 98117519A EP 98117519 A EP98117519 A EP 98117519A EP 0987446 A1 EP0987446 A1 EP 0987446A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston
hydraulic cylinder
hydraulic
pressure cylinder
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.)
Withdrawn
Application number
EP98117519A
Other languages
German (de)
English (en)
Inventor
Carsten Heinrich Dr.-Ing. Müller
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.)
LINGK & STURZEBECHER LEICHTBAU GMBH
Original Assignee
Lingk & Sturzebecher Leichtbau 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 Lingk & Sturzebecher Leichtbau GmbH filed Critical Lingk & Sturzebecher Leichtbau GmbH
Priority to EP98117519A priority Critical patent/EP0987446A1/fr
Publication of EP0987446A1 publication Critical patent/EP0987446A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • 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
    • F15B15/1404—Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block
    • 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
    • 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
    • F15B15/1414—Characterised by the construction of the motor unit of the straight-cylinder type with non-rotatable piston
    • 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
    • F15B15/1428—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7107—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being mechanically linked

Definitions

  • the invention relates to a hydraulic cylinder with a hydraulic piston charged with hydraulic medium.
  • Hydraulic cylinder is used in particular Clamping ground anchors and earth phases in the basic structure and for Tensioning tendons used in building construction.
  • a number of hydraulic cylinders are used in practice known that have a pressure cylinder in which one or several actuating pistons are guided. As a rule, they exist Pressure cylinder walls of these hydraulic cylinders made of metal. The adjusting pistons and the piston rods are usually solid and also consist of a metal. These known hydraulic cylinders have a disadvantage heavy weight. Hydraulic cylinders have already been installed in the Developed with a view to reducing weight. Here become light metal components or plastic components used for the hydraulic cylinder. These well-known Hydraulic cylinders, however, have the disadvantage that deformations of the hydraulic medium at high pressures Printing cylinders can result, leading to impairment tightness. To achieve high These known hydraulic cylinders are therefore actuating forces not very suitable.
  • Hydraulic cylinders are also known (DE 44 30 502), in which the pressure cylinder wall a metallic liner in the form of a circular cylindrical Inner tube and a fiber-reinforced Plastic pipe is made. These hydraulic cylinders, in particular used for high pressure hydraulic actuators have proven their worth. Nonetheless are especially for certain uses of hydraulic cylinders Improvements possible.
  • the invention is based on the technical problem, one Specify hydraulic cylinder of the type mentioned, the on the one hand has a very low weight, in which nonetheless a reliable and effective Power transmission is guaranteed and at the same time characterized by a high mechanical resistance.
  • the invention teaches a hydraulic cylinder with actuating pistons acted upon by a hydraulic medium, wherein the hydraulic cylinder consists of a plurality of pressure cylinders, which pressure cylinders are arranged parallel to one another to form a cylinder-shell-shaped unit, wherein at least one actuating piston with a piston rod is guided in each pressure cylinder, the pressure cylinder walls having circular cylindrical fiber-reinforced plastic tubes and in each case one end component connected to the end faces of the pressure cylinders is provided on the two end faces of the hydraulic cylinder, and the piston rods of the pressure cylinders are guided in recesses of at least one end component.
  • the hydraulic cylinder according to the invention So a pressure cylinder unit in which the individual Printing cylinders are arranged in a ring and thus, as it were form the cylinder jacket of the hydraulic cylinder.
  • This ring-shaped arrangement is expedient the impression cylinder is a cylindrical cavity inside the pressure cylinder unit or inside the hydraulic cylinder educated.
  • the number of Any pressure cylinder of the hydraulic cylinder according to the invention if the requirement is observed that the printing cylinder be arranged in a ring or cylinder jacket have to.
  • the number of printing cylinders is preferably in the hydraulic cylinder 6 to 14 according to the invention, preferred 8 to 12.
  • the pressure cylinder designed as a hollow piston cylinder.
  • Hollow piston cylinder means in the context of the invention in particular that the Piston rods of the pressure cylinder are hollow on the inside are.
  • the piston rods are expediently over hollow at least two thirds of their length. Preferably at least half of the piston rods are preferred at least two thirds of their diameter (based on the outer diameter) hollow.
  • the Piston rods can be made of steel.
  • the invention consist of the piston rods a light metal. Basically, it is also in the frame of the invention to hollow the actuating piston inside.
  • the Adjusting piston expediently consists of a light metal.
  • the pressure cylinder walls are as circular cylindrical fiber-reinforced plastic tubes.
  • Fiber-reinforced plastic pipes mean preferred Embodiment of the invention in particular with carbon fibers reinforced plastic pipes (so-called CFRP pipes).
  • CFRP pipes carbon fibers reinforced plastic pipes
  • the Printing cylinder walls each as a composite unit a metallic liner in the form of a circular cylindrical Inner tube and the fiber-reinforced Plastic tube trained.
  • Impression cylinder or the impression cylinder wall only from the aforementioned composite aggregate of metallic Liner and fiber-reinforced plastic tube.
  • the expression Liner means that the inner tube is very thin-walled is executed.
  • the metallic liner preferably has a wall thickness of less than 2 mm, very preferably less than 1 mm.
  • the metallic liner is expediently a drawn one Pipe in the form of a precision pipe with a wall thickness of less than 1 mm.
  • the metallic liner preferably consists of Steel or an alloy from the group "steel alloy, Aluminum alloy, magnesium alloy, aluminum / magnesium alloy ".
  • the fiber-reinforced plastic tube can via a shrink connection or via an adhesive connection be connected to the metallic liner. It is also in the Within the scope of the invention to realize the association by that the plastic outer tube on the metallic liner is wound directly.
  • Hydraulic medium on the first end component on the piston side Printing cylinder spaces of the printing cylinder can be fed.
  • Appropriate are appropriate in the first end component Channels and / or chambers for the feed and / or discharge of the hydraulic medium is provided. It is within the scope of the invention that the hydraulic medium piston-side impression cylinder spaces of all impression cylinders can be fed evenly.
  • the hydraulic medium is preferably also on the piston rod side via the second end component Printing cylinder spaces of the printing cylinder can be fed.
  • the second end component expediently has corresponding ones Channels and / or chambers for the feed and / or Drain the hydraulic medium.
  • the hydraulic medium on the piston rod side Printing cylinder spaces of all printing cylinders evenly is feedable.
  • at least one Safety overflow valve arranged. If, for example the piston rods are fully extended, can be convenient Hydraulic medium via the safety overflow valves flow into the second end component. A such opening of a safety overflow valve can occur after an embodiment of the invention thereby achieved that a mechanical release device is actuated when the actuating piston is the second end component approaches or if the actuating piston the second end component reached.
  • the mechanical release device can Adjusting piston and / or arranged on the associated piston rod his.
  • the mechanical release device can it is, for example, a corresponding trigger pin act.
  • a safety relief valve when a certain pressure in the associated piston side Open the pressure cylinder room. If according to this embodiment the piston rods are fully extended and the control piston reached the second final component, the Safety relief valves open when the pressure in the piston-side pressure cylinder spaces is further increased. are on the other hand, the piston rods can be fully retracted Hydraulic medium via the safety overflow valves in drain the first final component. In this case, too can use a safety relief valve either a mechanical described above Tripping device can be opened or the safety overflow valve opens when a certain one is reached Pressure in the pressure cylinder chambers on the piston rod side.
  • - Oil is preferably used as the hydraulic medium. It However, is also within the scope of the invention as Use hydraulic medium water.
  • each end component very preferably both end components a light metal and / or a light metal alloy, preferably from at least one material from the group "Aluminum, aluminum alloy, magnesium alloy, aluminum / magnesium alloy".
  • each a composite unit made of fiber-reinforced plastic outer tube and metallic inner liner is preferred the final components of the hydraulic cylinder with the metallic inner liner is positively connected.
  • Other control rooms expediently engage end component extensions preferably on each end of the pressure cylinder into the pressure cylinder and lie positively and sealing against the metallic inner liner. Then can dispense with complex seals of the pressure cylinder become.
  • two end components connected by tie rods By adjusting the pulling force of the pull rods can effectively counter the pressure cylinder according to the invention Deformations caused by high pressure medium are stabilized. - If according to a preferred embodiment of the invention in a safety overflow valve between each pressure cylinder piston-side pressure cylinder space and piston rod-side Pressure cylinder space is arranged, the Tension rods in the operation of the hydraulic cylinder usually not overburdened.
  • the invention is based on the knowledge that the invention Hydraulic cylinders compared to other known ones Hydraulic cylinders with considerably reduced weight can be executed and still with regard to its functionality meets all requirements.
  • At remarkable reduced weight can with the invention Hydraulic cylinders nonetheless a very reliable one and, above all, surprisingly effective power transmission can be achieved.
  • the weight of the invention Hydraulic cylinder can be compared to known hydraulic cylinders, which transmit comparable high forces, except for one Quarters are reduced. Nevertheless, with that Pressure cylinder unit according to the invention high actuating forces to be produced.
  • the hydraulic cylinder according to the invention has high mechanical resistance, so that pressure cylinder-related deformations of the pressure cylinder do not occur. This is especially true for the preferred one Execution of the invention in which the impression cylinder a composite unit of a fiber-reinforced plastic outer tube and a metallic inner liner.
  • This pressure cylinder of the hydraulic cylinder according to the invention can absorb very high pressures of a pressure medium, without bulging deformations of the printing cylinders. In this respect, the tightness of the pressure cylinder remains guaranteed.
  • the pressure cylinder each has a safety overflow valve is arranged.
  • the result is an extreme lightweight hydraulic cylinder created with the nonetheless generates high actuating forces in a reliable manner can be.
  • the individual arranged in a cylinder jacket Printing cylinders can be surprisingly effective apply the required total force of the hydraulic cylinder. The applied by the individual printing cylinders Forces add up to that of the hydraulic cylinder total force applied.
  • the hydraulic cylinder according to the invention shown in the figures consists of a plurality of pressure cylinders 1, which impression cylinder 1 parallel to each other to form a cylinder jacket Aggregate are arranged.
  • the impression cylinders 1 are put together as it were circular and close a cylindrical in the embodiment Cavity.
  • the control piston 2 is preferably made of a light metal.
  • the control piston is preferably present aluminum or an alloy of the group "Aluminum alloy, magnesium alloy, aluminum / magnesium alloy".
  • the pressure cylinder 1 as a hollow piston cylinder executed.
  • the piston rods 3 almost over their entire length hollow (Fig. 3).
  • the pressure cylinder walls 4 each as a composite unit from a metallic liner in the form of a circular cylindrical metallic inner tube 5 and one on it attached fiber-reinforced plastic tube 6 formed.
  • Final component 7, 8 provided on each of the two faces of the hydraulic cylinder one connected to the end faces of the impression cylinder 1
  • a first final component 7 forms in the embodiment as it were Bottom of the hydraulic cylinder.
  • a second final component 8 is located at the top of the hydraulic cylinder.
  • the final components 7, 8 are preferably made of aluminum.
  • the final components 7, 8 are preferred and in the exemplary embodiment with final component extensions 10 in the pressure cylinder 1 and these final component extensions 10 are form-fitting and thus sealing against the circular cylindrical Inner pipe of the metallic liner connected.
  • the hydraulic medium is first end component 7 the piston-side pressure cylinder spaces 11 of the printing cylinder 1 can be fed.
  • the first end component 7 does not correspond in the figures shown channels and / or chambers.
  • 1 and 2 is a feed opening 12 for the feed (and / or Discharge) of the hydraulic medium in the first end component 7 trained. It is understood that the hydraulic medium all piston-side impression cylinder spaces 11 of the impression cylinder 1 is equally feedable.
  • the Adjusting piston 2 moves in the direction of the end component 8 and the piston rods 3 extend.
  • Preferably and in The embodiment is on the piston rods 3 of the pressure cylinder 1 an end plate 13 connected with the piston rods 3 is moved.
  • the second end component 8 channels and / or not shown in the figures Chambers on.
  • a safety overflow valve 16 is arranged in each case.
  • a mechanical release device not shown which actuates the safety relief valve 16 opens so that the hydraulic medium on the second end member 8 can drain.
  • the mechanical release device can be a trigger pin, for example acts by contact with the second end member 8 is actuated so that the safety overflow valve 16 opens.
  • the safety relief valve at another Pressure increase in the piston-side pressure cylinder spaces 11, that means when a certain pressure is reached, opens.
  • the actuating piston 2 is the first end component 7 approaches the safety overflow valve 16 open so that the hydraulic medium over the first end member 7 can drain.
  • a trigger pin mentioned above be the safety overflow valve 16 when reached of the first end component 7 opens.
  • the safety overflow valve 16 opens when a certain pressure in the assigned piston rod side pressure cylinder space 14 exceeded becomes.
  • the two end components are preferably and in the exemplary embodiment 7, 8 connected to each other by tie rods 17.
  • the tie rods 17 expediently consist of one Light metal or from a light metal alloy. In the embodiment like the tie rods 17 as aluminum tie rods be executed. By adjusting the pulling force the tie rods 17 can the pressure cylinder 1 very much effectively stabilized against deformation caused by high pressure medium become.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP98117519A 1998-09-15 1998-09-15 Vérin hydraulique Withdrawn EP0987446A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98117519A EP0987446A1 (fr) 1998-09-15 1998-09-15 Vérin hydraulique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98117519A EP0987446A1 (fr) 1998-09-15 1998-09-15 Vérin hydraulique

Publications (1)

Publication Number Publication Date
EP0987446A1 true EP0987446A1 (fr) 2000-03-22

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ID=8232646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98117519A Withdrawn EP0987446A1 (fr) 1998-09-15 1998-09-15 Vérin hydraulique

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EP (1) EP0987446A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1022536C2 (nl) * 2003-01-31 2004-08-04 Seatools B V Systeem voor het opslaan, afgeven en terugwinnen van energie.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3157032A (en) * 1962-09-20 1964-11-17 Hercules Galion Prod Inc Hydraulic flow equalizer
DE2362234A1 (de) * 1972-12-22 1974-07-04 Asea Atom Ab Anordnung zum positionieren und fixieren linear verschiebbarer gegenstaende
US5431087A (en) * 1994-06-15 1995-07-11 Kambara; Goro Extended stroke linear actuator assembly
DE4414907A1 (de) * 1994-04-28 1995-11-02 Rexroth Mannesmann Gmbh Mehrfachzylinder, insbesondere für Pressen
DE4430502A1 (de) * 1994-08-27 1996-02-29 Lingk & Sturzebecher Gmbh Verwendung eines Verbundaggregates aus einem Liner und einem faserverstärkten Kunststoffrohr als Druckzylinder eines Stelltriebes der Hochdruckhydraulik

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3157032A (en) * 1962-09-20 1964-11-17 Hercules Galion Prod Inc Hydraulic flow equalizer
DE2362234A1 (de) * 1972-12-22 1974-07-04 Asea Atom Ab Anordnung zum positionieren und fixieren linear verschiebbarer gegenstaende
DE4414907A1 (de) * 1994-04-28 1995-11-02 Rexroth Mannesmann Gmbh Mehrfachzylinder, insbesondere für Pressen
US5431087A (en) * 1994-06-15 1995-07-11 Kambara; Goro Extended stroke linear actuator assembly
DE4430502A1 (de) * 1994-08-27 1996-02-29 Lingk & Sturzebecher Gmbh Verwendung eines Verbundaggregates aus einem Liner und einem faserverstärkten Kunststoffrohr als Druckzylinder eines Stelltriebes der Hochdruckhydraulik

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1022536C2 (nl) * 2003-01-31 2004-08-04 Seatools B V Systeem voor het opslaan, afgeven en terugwinnen van energie.
WO2004067435A1 (fr) * 2003-01-31 2004-08-12 Seatools B.V. Systeme pour stocker, fournir et recuperer de l'energie

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