EP1819928B1 - Cylindre pour l'hydraulique haute pression - Google Patents

Cylindre pour l'hydraulique haute pression Download PDF

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Publication number
EP1819928B1
EP1819928B1 EP05804672A EP05804672A EP1819928B1 EP 1819928 B1 EP1819928 B1 EP 1819928B1 EP 05804672 A EP05804672 A EP 05804672A EP 05804672 A EP05804672 A EP 05804672A EP 1819928 B1 EP1819928 B1 EP 1819928B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
inner tube
jacket
cylinder head
reinforced plastic
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.)
Active
Application number
EP05804672A
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German (de)
English (en)
Other versions
EP1819928A1 (fr
Inventor
Othmar HÖLZL
Martin Fiedler
Rudolf Mark
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.)
Holzl Margit
Original Assignee
Holzl Margit
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Publication date
Application filed by Holzl Margit filed Critical Holzl Margit
Publication of EP1819928A1 publication Critical patent/EP1819928A1/fr
Application granted granted Critical
Publication of EP1819928B1 publication Critical patent/EP1819928B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • 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
    • 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
    • F15B15/1438—Cylinder to end cap assemblies
    • 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
    • F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
    • F15B2215/30—Constructional details thereof
    • F15B2215/305—Constructional details thereof characterised by the use of special materials

Definitions

  • the invention relates to a cylinder for high-pressure hydraulics with a running between a cylinder base and a cylinder head cylinder jacket of an inner tube and an applied to the inner tube outer sheath made of fiber-reinforced plastic.
  • NL 1 017 640 C2 is a cylinder suitable for high-pressure hydraulics, with a running between a cylinder base and a cylinder head cylinder shell of an inner tube and an applied to the inner tube outer sheath of fiber reinforced plastic known.
  • the screwed to the cylinder bottom, with the outer shell shear-resistant connected inner tube of the cylinder jacket is connected to the cylinder head tension.
  • the US 4,867,044 A shows a hydraulic cylinder with a cylinder jacket of a tensile strength connected to a cup-shaped cylinder head and cylinder bottom jacket tube. On the jacket tube and opposite end faces of the cylinder head and cylinder base partially covering an outer layer of fiber reinforced plastic is applied.
  • a hydraulic cylinder in particular for use in aircraft, known in composite construction.
  • This consists of a substantially thin-walled inner tube with an internal thread, for fixing a cylinder base and a cylinder head, in thickened end sections.
  • the cylinder tube with the thickened end portions is provided on the outer surface with preferably a plurality of wound in the form of spiral wound fiber reinforced plastic layers.
  • A1 is a gas / oil pressure accumulator, in particular for hydraulic control circuits known, which is formed by a cylindrical body with closed-end bottoms. Inside a cylindrical shell portion is a displaceable piston, which divides the interior into two chambers, arranged, one of which is a hydraulic oil and the other is designed for a compressed gas.
  • a jacket which forms the cylindrical body is formed from an inner sheath of metal of lesser thickness, on which a spiral wound layer of fiber-reinforced plastic is applied, which surrounds at least one of the bottoms in certain regions.
  • the radial compressive forces are transmitted through the thin-walled inner tube to the fiber-reinforced outer jacket, which absorbs these compressive forces, without fear of leaking of the cylinder, because the outer sheath of fiber-reinforced plastic remains free of axial tensile loads.
  • the axial forces caused by high pressure hydraulics are absorbed exclusively by the tie rods.
  • a disadvantage of these known cylinders that the time required to absorb the axial forces tie rod not only increase the construction cost and the cylinder dimensions, but also bring an increase in weight with it.
  • the invention is therefore based on the object, a cylinder for high-pressure hydraulic of the type described in such a way that can be dispensed with simple structural means on the use of tie rods for receiving the axial forces.
  • the invention solves the problem set by the fact that the bolted to the cylinder bottom, with the outer shell shear-resistant connected inner tube of the cylinder jacket tensile strength acts on the cylinder head.
  • the axial forces can be recorded in a surprising manner even at a high pressure hydraulics through the cylinder jacket, if by a shear-resistant connection of the outer jacket made of fiber reinforced plastic with the inner tube a corresponding is provided in both the circumferential direction and in the axial direction of effective composite body.
  • a shear-resistant connection of the outer jacket made of fiber reinforced plastic with the inner tube a corresponding is provided in both the circumferential direction and in the axial direction of effective composite body.
  • the inner tube can be made in known manner of metal, but also of a polyetheretherketone (PEEK), because in both cases not only the axial tensile forces can be absorbed in combination with the outer sheath of fiber reinforced plastic, but also the outer sheath of an immediate Load is protected by the hydraulic fluid, so that the strength properties of the fiber reinforced plastic can not be affected by penetrating into micropores hydraulic fluid.
  • PEEK polyetheretherketone
  • connection conditions for the cylinder jacket to the cylinder bottom arise when the outer sheath made of plastic with the cylinder bottom is shear-resistant and the cylinder bottom overlaps the end face, so that the axial force is not introduced into the outer sheath exclusively on the shear forces between the inner tube and the outer sheath.
  • the shear-resistant connection between the outer sheath made of fiber-reinforced plastic with the inner tube or the cylinder base can be achieved in a simple manner by an adhesive layer.
  • the tensile connection of the cylinder head to the cylinder jacket can be solved in a similar manner as the connection of the cylinder base constructive, but this excludes a subsequent removal of the cylinder head from the cylinder jacket and thus a possible piston expansion.
  • the inner tube of the cylinder jacket on the cylinder head side on an end annular flange which is overlapped by a cylinder head provided on the union nut, so that with the help of this nut the necessary tensile connection between the inner tube of the cylinder jacket and the cylinder head can be ensured.
  • the outer sheath of fiber-reinforced plastic extends to the cylinder head side annular flange of the inner tube.
  • the illustrated cylinder has a cylinder bottom 1, a cylinder head 2 and a cylinder shell extending between cylinder bottom 1 and cylinder head 2 3 on.
  • the cylinder jacket 3 is formed by a composite body of a thin-walled, metallic inner tube 4 and an outer jacket 5 made of fiber-reinforced plastic that is connected to the inner tube 4 in a shear-resistant manner.
  • fiber reinforcement preferably carbon fibers are used. The choice of plastic is naturally made depending on the particular load requirements.
  • the inner tube 4 has on the side of the cylinder base 1 a thickened connection portion 6 with a thread 7, by means of which the inner tube 4 is connected in a tensile strength with the cylinder base 1.
  • the inner tube 4 is also provided with a thickened end portion 8, which, however, forms an end-side annular flange 9.
  • This annular flange 9 is overlapped by a screw-mounted on the cylinder head 2 screw nut 10, so that a tensile connection with the cylinder head 2 is made by the nut 10, which can be removed after loosening the nut 10 from the cylinder jacket 3.
  • the outer sheath 5 made of fiber-reinforced plastic extends in the region of the end portion 8 of the inner tube 4 to the annular flange 9 and is therefore enclosed by the union nut 10.
  • the outer shell 5 is extended beyond the thickened end portion 6 out and overlaps the cylinder base 1 frontally, whereby the axial connection of the cylinder jacket 3 is advantageously supported on the cylinder base 1, especially if the outer jacket 5 also with the Cylinder bottom 1 is shear-resistant connected by an adhesive layer.
  • the connections 11 and 12 are guided for the hydraulic fluid through the cylinder base 1 and the cylinder head 2, the load capacity of the cylinder jacket 3 is not affected by these connections 11 and 12.
  • the metallic inner tube 4 which preferably consists of a corrosion-resistant steel
  • the outer jacket 5 made of plastic from an immediate load Protected by the hydraulic fluid, so that any existing microporosity of the fiber-reinforced plastic leads to no strength restriction due to an immediate pressure load by the hydraulic fluid.
  • the inner tube 4 may also be made of plastic, namely of a polyetheretherketone. Also in this case, the inner tube 4 is screwed to the cylinder base to achieve a secure axial connection. In addition, the inner tube 4 can be glued to the cylinder bottom.
  • the piston 13 with the piston rod 14 may also be made of fiber-reinforced plastic, but this is not mandatory.
  • a metallic coating is recommended in order to improve the sealing conditions for a high-pressure hydraulics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Types And Forms Of Lifts (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Claims (6)

  1. Cylindre pour l'hydraulique haute pression avec une enveloppe de cylindre (3), s'étendant entre un fond de cylindre (1) et une tête de cylindre (2), en un tube intérieur (4) et une enveloppe extérieure (5) appliquée sur le tube intérieur (4), en matériau synthétique renforcé par des fibres, où le tube intérieur (4) de l'enveloppe de cylindre (3), vissé avec le fond de cylindre (1), relié d'une manière résistante à la poussée à l'enveloppe extérieure (5), s'applique d'une manière résistante à la traction à la tête de cylindre (2), caractérisé en ce que l'enveloppe extérieure (5) en matériau synthétique renforcé par des fibres s'étend, côté tête de cylindre, jusqu'à une bride annulaire (9) au côté frontal du tube intérieur (4), et en ce que la tête de cylindre (2) supporte un écrou-raccord (10) recouvrant la bride annulaire (9) par lequel est assurée la liaison résistant à la traction entre le tube intérieur (4) et la tête de cylindre (2).
  2. Cylindre selon la revendication 1, caractérisé en ce que le tube intérieur est réalisé d'une manière connue en métal, de préférence en acier.
  3. Cylindre selon la revendication 1, caractérisé en ce que le tube intérieur est réalisé en polyétherétherkétone.
  4. Cylindre selon l'une des revendications 1 à 3, caractérisé en ce que l'enveloppe extérieure (5) en matériau synthétique renforcé par des fibres, reliée d'une manière résistante à la poussée au fond de cylindre (1), recouvre le fond de cylindre (1) au côté frontal.
  5. Cylindre selon l'une des revendications 1 à 4, caractérisé en ce que l'enveloppe extérieure (5) en matériau synthétique renforcé par des fibres est reliée au tube intérieur (4) d'une manière résistante à la poussée par une couche de colle.
  6. Cylindre selon l'une des revendications 1 à 5, caractérisé en ce que le tube intérieur (4), au côté du fond de cylindre (1), est pourvu d'une section de raccord épaissie (6) et, au côté de la tête de cylindre, d'une section d'extrémité épaissie (8).
EP05804672A 2004-11-25 2005-11-24 Cylindre pour l'hydraulique haute pression Active EP1819928B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0198004A AT502447B1 (de) 2004-11-25 2004-11-25 Zylinder für hochdruckhydraulik
PCT/AT2005/000472 WO2006055997A1 (fr) 2004-11-25 2005-11-24 Cylindre pour l'hydraulique haute pression

Publications (2)

Publication Number Publication Date
EP1819928A1 EP1819928A1 (fr) 2007-08-22
EP1819928B1 true EP1819928B1 (fr) 2010-08-25

Family

ID=35953816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05804672A Active EP1819928B1 (fr) 2004-11-25 2005-11-24 Cylindre pour l'hydraulique haute pression

Country Status (5)

Country Link
US (1) US20100077918A1 (fr)
EP (1) EP1819928B1 (fr)
AT (2) AT502447B1 (fr)
DE (1) DE502005010149D1 (fr)
WO (1) WO2006055997A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014114498A1 (fr) * 2013-01-28 2014-07-31 Zf Friedrichshafen Ag Ensemble cylindre présentant une liaison par adhésif

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ561410A (en) 2007-09-11 2010-04-30 Parker Hannifin Gmbh End-fittings for composite tubes, method for joining fittings to the ends of composite tubes and composite tubes incorporating end-fittings
DE102010024126A1 (de) * 2010-06-17 2011-12-22 Carl Freudenberg Kg Kolbenspeicher
CN102705293B (zh) * 2012-06-14 2014-04-09 中联重科股份有限公司 致动缸的缸体及其制造方法和混凝土泵送设备
CN103075387B (zh) * 2013-01-21 2015-08-05 四川重汽王牌兴城液压件有限公司 2tg-e110×90液压油缸进油机构及其生产方法
FR3002187B1 (fr) * 2013-02-20 2016-07-22 Peugeot Citroen Automobiles Sa Dispositif d'amortissement a jambe de force hybride, pour un train avant de vehicule
DE102015211545B3 (de) * 2015-06-23 2016-11-10 Innotec Lightweight Engineering & Polymer Technology Gmbh Zylinderrohr für einen Hydraulik- oder Pneumatikzylinder
CN105673609B (zh) * 2016-03-17 2018-11-16 中联重科股份有限公司 复合材料套筒和液压缸
CN105587709B (zh) * 2016-03-17 2018-03-06 中联重科股份有限公司 液压缸
US10272991B2 (en) * 2016-06-23 2019-04-30 Goodrich Corporation Metallic composite joint
CN107693292A (zh) * 2017-10-26 2018-02-16 广州艾捷斯医疗器械有限公司 一种靠背可伸缩的儿童牙科综合治疗机
AU2018203763A1 (en) * 2018-05-29 2019-12-19 Turnbull, Sam Dominic Seaton MR Intrascopic Cylinder
DE102021209068A1 (de) * 2021-08-18 2023-02-23 Festo Se & Co. Kg Fluidbetätigter Arbeitszylinder und diesbezügliches Herstellungsverfahren
JP7431919B1 (ja) * 2022-10-19 2024-02-15 カヤバ株式会社 流体圧シリンダ
EP4261385A1 (fr) * 2023-01-24 2023-10-18 DWL Baumaschinen AG Unité de presse à dresser pour constructions de conduites sans tranchée

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014114498A1 (fr) * 2013-01-28 2014-07-31 Zf Friedrichshafen Ag Ensemble cylindre présentant une liaison par adhésif

Also Published As

Publication number Publication date
US20100077918A1 (en) 2010-04-01
WO2006055997A1 (fr) 2006-06-01
EP1819928A1 (fr) 2007-08-22
DE502005010149D1 (de) 2010-10-07
ATE479024T1 (de) 2010-09-15
AT502447B1 (de) 2007-06-15
AT502447A1 (de) 2007-03-15

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