EP2397701A2 - Accumulateur à piston - Google Patents

Accumulateur à piston Download PDF

Info

Publication number
EP2397701A2
EP2397701A2 EP20110001989 EP11001989A EP2397701A2 EP 2397701 A2 EP2397701 A2 EP 2397701A2 EP 20110001989 EP20110001989 EP 20110001989 EP 11001989 A EP11001989 A EP 11001989A EP 2397701 A2 EP2397701 A2 EP 2397701A2
Authority
EP
European Patent Office
Prior art keywords
piston
housing
housing wall
accumulator according
sliding layer
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
EP20110001989
Other languages
German (de)
English (en)
Other versions
EP2397701B1 (fr
EP2397701A3 (fr
Inventor
Thorsten Hillesheim
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP2397701A2 publication Critical patent/EP2397701A2/fr
Publication of EP2397701A3 publication Critical patent/EP2397701A3/fr
Application granted granted Critical
Publication of EP2397701B1 publication Critical patent/EP2397701B1/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
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
    • 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
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • 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
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • 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
    • F15B2201/405—Housings
    • F15B2201/4053—Housings characterised by the material

Definitions

  • the invention relates to a piston accumulator, comprising a housing having a pressure chamber, which is delimited by a housing wall and a piston, wherein the piston is movable relative to the housing, wherein the volume of the pressure chamber is variable and wherein the piston along the housing wall is slidably displaceable.
  • the currently known piston accumulators which are used in the storage technology, have a piston made of aluminum or steel. This piston is used for media separation. In this case, gases of the pressure chamber are separated from hydraulic fluids.
  • the final contour of the known piston is produced in a cutting process.
  • the known piston play a game to the surrounding housing.
  • guide rings are made of polytetrafluoroethylene with a Graphiteinlagerung. These guide rings are relatively expensive and must be mounted separately.
  • the known piston accumulators are therefore relatively expensive and expensive to manufacture.
  • the invention is therefore an object of the invention to provide a piston accumulator, the piston can be easily manufactured and assembled.
  • a piston accumulator of the type mentioned is characterized in that the piston and / or the housing wall is associated with a sliding layer such that the piston is free of guide rings along the housing wall movable.
  • a sliding layer allows to move a piston without guide rings within a housing. It has been concretely recognized that by the action of a sliding layer, the clearance between the lateral surface of the piston and the housing wall can be adjusted such that no guide rings are more necessary, the piston accumulator according to the invention therefore has no associated with the piston Guide rings on. Therefore, the mounting of guide rings is eliminated. Since the piston accumulator according to the invention has no guide rings, its mounting is considerably simplified. The piston accumulator according to the invention can thus be manufactured inexpensively and easily.
  • the piston can be easily equipped with a sliding layer and used in a housing predetermined meetingses.
  • a sliding layer could be formed on the housing wall.
  • a sliding layer on the housing wall allows to compensate for manufacturing tolerances in their manufacture.
  • a sliding layer is formed either only on the piston or only on the housing wall or on the piston and on the housing wall.
  • a seal could be arranged without support ring.
  • a seal surrounding the piston made of an elastomer is used as the seal.
  • the piston could be made of plastic.
  • a piston made of plastic can be produced by a so-called tool-falling method.
  • a plastic piston can be manufactured by a plastic injection molding tool. In this case, the production can be carried out such that the piston already has its final dimensions or its final contour and without further processing is verbaudate.
  • the production of the piston made of plastic allows in particular the setting of a game between the piston and the housing wall, in which no support ring is necessary.
  • the piston accumulator therefore has no support ring associated with the piston.
  • the assembly of the support ring is eliminated.
  • the installation of guide rings is eliminated.
  • the piston accumulator therefore has no guide rings associated with the piston.
  • the sliding layer could be formed integrally and integrally with the piston, namely be formed as a lateral surface of the piston.
  • the sliding properties of the plastic used are used without providing a structurally or structurally separate from the piston sliding layer.
  • the sliding layer is virtually integrated in the plastic and given by its material properties.
  • the piston could be made of a thermosetting plastic.
  • the choice of plastic depends on tribological requirements and the permeation values for the gas within the piston accumulator. Surprisingly, thermosetting plastics have proven to be particularly impervious to the permeation of gases.
  • the piston could be made of a thermoplastic material. Thermoplastics can be easily processed by molding.
  • the piston could be made of aluminum and manufactured by a molding process, in particular by a cold extrusion process.
  • the piston could be made of a metal, preferably an aluminum material.
  • the games between the piston and the housing wall are adjusted so that can be dispensed with guide rings and / or support rings.
  • the tribological properties are optimized by creating a lubricating layer by a surface coating process.
  • the Slip layer can be applied to the piston and / or on the housing wall.
  • the initial contour of the piston can be produced by a callosing process, the final contour being created by a machining process.
  • the housing could be made of plastic. This can save costs and weight.
  • the housing could be made of a thermosetting plastic. As a result, a high gas tightness is realized.
  • the housing could be made of a thermoplastic material. These plastics can be processed without problems under suitable thermal conditions.
  • the housing could be made of steel, aluminum or a plastic.
  • the choice of material depends on its thermal expansion coefficient.
  • aluminum is readily machinable and does not require a burnishing process to achieve gas tightness in the motion seal by suitable methods. Through these process improvements, the housing can be manufactured inexpensively.
  • the piston accumulator described here can advantageously be used wherever stored hydraulic energy has to be made available.
  • the piston accumulator can be used in hydraulic systems of motor vehicles or industrial hydraulic systems.
  • Fig. 1 shows a piston accumulator 1, comprising a housing 2 with a pressure chamber 3, which is bounded by the housing wall 4 and a piston 5, wherein the piston 5 is movable relative to the housing 2, wherein the volume of the pressure chamber 3 is variable and wherein the piston along the housing wall 4 is slidably displaceable.
  • the piston 5 is assigned a sliding layer 6 such that the piston 5 is free of guide rings 7 along the housing wall 4 movable.
  • the piston 5 has no guide rings 7.
  • a piston accumulator 1 of the prior art according to Fig. 2 on the other hand has a piston 5, are attached to the guide rings 7 and a support ring 8 for a seal 9.
  • a seal 9 is arranged without support ring 8.
  • the seal 9 is formed as a sealing ring made of elastomer.
  • the seal 9 is received in a circumferential groove 10 in the piston 5 and is sealingly against the housing wall 4 at.
  • the piston 5 according to Fig. 1 is made of plastic.
  • the sliding layer 6 is formed directly on the piston 5, namely, is integrated in the piston 5.
  • the sliding layer 6 is formed integrally and integrally with the piston 5.
  • the sliding layer 6 is in fact formed as a lateral surface 11 of the piston 5. In this case, the sliding properties of the plastic are utilized without a structurally or structurally separate from the piston 5 sliding layer 6 is provided.
  • the piston 5 is made of a thermosetting plastic.
  • a compressible gas preferably nitrogen is added, which can be compressed by acting on the piston surface 12 hydraulic fluid.
  • the piston 5 When compressing the gas, the piston 5 is moved along the housing wall 4. The piston 5 slides along the housing wall. 4
  • the housing 2 is cup-shaped. It has an open end 13 into which the piston 5 is inserted and secured by a retaining ring 15. At the open end 13, a thread 14 is formed, through which the piston accumulator 1 is screwed as a whole in an existing arrangement can be.
  • the piston accumulator 1 can be used as Pulsationsdämpfier in hydraulic systems of motor vehicles.
  • the piston accumulator 1 can also be used together with a mechatronics, which controls a pressurized oil supply and / or automated transmission.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP11001989.0A 2010-06-17 2011-03-10 Accumulateur à piston Active EP2397701B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010024126A DE102010024126A1 (de) 2010-06-17 2010-06-17 Kolbenspeicher

Publications (3)

Publication Number Publication Date
EP2397701A2 true EP2397701A2 (fr) 2011-12-21
EP2397701A3 EP2397701A3 (fr) 2013-08-28
EP2397701B1 EP2397701B1 (fr) 2015-10-14

Family

ID=44675011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11001989.0A Active EP2397701B1 (fr) 2010-06-17 2011-03-10 Accumulateur à piston

Country Status (4)

Country Link
US (1) US20110308383A1 (fr)
EP (1) EP2397701B1 (fr)
CN (1) CN102287406B (fr)
DE (1) DE102010024126A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012021841A1 (de) * 2012-10-26 2014-04-30 Hydac Technology Gmbh Trennvorrichtung für Fluidmedien
US20150184746A1 (en) * 2013-12-27 2015-07-02 Ming-Chang Shih Non-metallic and non-magnetic pneumatic actuator
DE102015214202A1 (de) 2015-07-28 2017-02-02 Volkswagen Aktiengesellschaft Kolbendruckspeicher für ein hydraulisches Steuersystem eines Getriebes eines Kraftfahrzeuges
CN107120321A (zh) * 2017-03-02 2017-09-01 成都捷冠科技有限公司 一种节能蓄能器
JP6702905B2 (ja) * 2017-03-13 2020-06-03 日本発條株式会社 アキュムレータ
CN107013510A (zh) * 2017-04-27 2017-08-04 江苏创精锻有限公司 一种汽车用蓄能器
CN109340370A (zh) * 2018-12-18 2019-02-15 安徽聚力石油钻采设备科技有限公司 一种全复合材料活塞
US10634170B1 (en) * 2019-08-30 2020-04-28 Seal Aftermarket Products, Llc Accumulator piston for use in vehicle transmission system
US12188540B2 (en) 2022-04-22 2025-01-07 DRiV Automotive Inc. Method of assembling a bellows accumulator for suspension dampers
US12227047B2 (en) 2022-04-22 2025-02-18 DRiV Automotive Inc. Bellows accumulator fixation apparatus for suspension dampers
CN115163583A (zh) * 2022-06-28 2022-10-11 杰锋汽车动力系统股份有限公司 一种提高密封性的蓄能器结构
CN116480642A (zh) * 2023-04-28 2023-07-25 嘉兴晨人一信仪表有限公司 一种活塞式蓄能器
DE102024126961A1 (de) 2024-09-19 2026-03-19 Mahle International Gmbh Verfahren zur Herstellung eines Kolbens, Kolben und thermoakustische Wärmepumpe mit einem solchen Kolben

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US4738339A (en) * 1985-03-08 1988-04-19 Tayco Developments, Inc. Energy absorber device with composite plastic casing having high strength inner cylinder
US5044257A (en) * 1990-03-20 1991-09-03 Keystone International Holdings Corp. Rotary actuator and method for forming a rotary piston
DE4202905A1 (de) * 1992-02-01 1993-08-05 Bosch Gmbh Robert Zylinder, insbesondere druckmittelspeicher fuer hydraulische bremsanlagen
US6309508B1 (en) * 1998-01-15 2001-10-30 3M Innovative Properties Company Spinning disk evaporator
DE19847341A1 (de) * 1998-10-14 2000-04-20 Gkn Sinter Metals Holding Gmbh Kolben für eine Kolben-Zylinder-Anordnung, insbesondere Stoßdämpferkolben
DE10049913A1 (de) * 1999-10-18 2001-04-19 Luk Lamellen & Kupplungsbau Geberzylinder
US6318242B1 (en) * 1999-10-26 2001-11-20 Sauer-Danfoss Inc. Filled hydraulic piston and method of making the same
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DE10245404A1 (de) * 2002-09-28 2004-04-08 Gkn Sinter Metals Gmbh Pulvermetallurgisch hergestellter Kolbenkörper mit Stützstegen und Verfahren zu seiner Herstellung
WO2004055370A2 (fr) * 2002-12-13 2004-07-01 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Machine a pistons axiaux
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EP2058527A3 (fr) * 2007-11-08 2012-05-30 Parker-Hannifin Corporation Accumulateur composite à piston, réparable, à haute pression et léger doté d'une bride antidérapante
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Also Published As

Publication number Publication date
CN102287406B (zh) 2015-10-28
EP2397701B1 (fr) 2015-10-14
US20110308383A1 (en) 2011-12-22
DE102010024126A1 (de) 2011-12-22
CN102287406A (zh) 2011-12-21
EP2397701A3 (fr) 2013-08-28

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