EP2518328A1 - Accumulateur de pression et utilisation d'un corps d'équilibrage de pression associé - Google Patents

Accumulateur de pression et utilisation d'un corps d'équilibrage de pression associé Download PDF

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Publication number
EP2518328A1
EP2518328A1 EP11003411A EP11003411A EP2518328A1 EP 2518328 A1 EP2518328 A1 EP 2518328A1 EP 11003411 A EP11003411 A EP 11003411A EP 11003411 A EP11003411 A EP 11003411A EP 2518328 A1 EP2518328 A1 EP 2518328A1
Authority
EP
European Patent Office
Prior art keywords
pressure
accumulator
compensation body
vessel
pressure accumulator
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Withdrawn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
EP11003411A
Other languages
German (de)
English (en)
Inventor
Juergen Jaeckel
Marco Schoenwaelder
Michael Groesch
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
Priority to EP11003411A priority Critical patent/EP2518328A1/fr
Publication of EP2518328A1 publication Critical patent/EP2518328A1/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Withdrawn legal-status Critical Current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
    • 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
    • F15B1/086—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor the gas cushion being entirely enclosed by the separating means, e.g. foam or gas-filled balls
    • 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
    • F15B2201/3154—Accumulator separating means having flexible separating means the flexible separating means being completely enclosed, e.g. using gas-filled balls or foam
    • 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 pressure accumulator, comprising a pressure vessel which is flow-connected with a hydraulic system, wherein in the pressure vessel, a pressure peak compensation device is arranged.
  • the pressure vessel comprises two pressure chambers which are separated from one another by a separation chamber, of which the first chamber is filled with a compressed gas and the second chamber is connected to a hydraulic circuit.
  • the partition between the two chambers consists of at least one rotationally symmetrical metal diaphragm which has concentric corrugations and which is provided on its side facing the second chamber with an elastic covering.
  • the elastic covering on the side of the membrane facing the second chamber is provided in order to achieve complete emptying of the second chamber from the hydraulic fluid without damaging / destroying the metal membrane due to excessive mechanical stresses.
  • the pressure peak compensation device is formed in the known pressure accumulator by the filled with compressed gas first chamber, which is bounded by the partition wall in the form of elastically yielding metal membrane, the partition hermetically separates the two pressure chambers from each other.
  • the invention has for its object to further develop a pressure accumulator so that it has a simple structure and therefore is inexpensive to produce.
  • the pressure peak compensation device is formed by a compressible pressure compensation body, which is arranged loosely in the pressure vessel.
  • Such an accumulator can always be used when complete emptying of the pressure vessel from the hydraulic fluid is not required.
  • the pressure accumulator according to the invention is particularly simple and inexpensive to produce. This is mainly due to the fact that the compressible pressure compensation body is arranged loosely in the pressure vessel. A liquid-tight assignment within the pressure vessel, such as in a pressure accumulator with two pressure chambers, which are hermetically separated from each other by a partition, is not required in the pressure accumulator according to the invention. Where the pressure compensation body is located within the pressure vessel plays no role for the function of the pressure accumulator according to the invention. Occurs in the hydraulic system to a pressure peak, which is to be compensated by the pressure accumulator, the pressure compensation body is elastically yielding deformed by the pressure peak. If then normal normal pressure returns in the hydraulic system, the pressure compensation body expands and resumes its production-conditioned, original shape.
  • the pressure compensation body may be formed by a foam body.
  • Foam body are in different specification, which are adapted to the particular application, easy and inexpensive to produce.
  • the foam body is therefore according to an advantageous embodiment of a substantially closed-cell foam.
  • the pressure compensation body can, for. B. consist of a closed-cell polyurethane foam, which is finely porous and highly compressible.
  • foams may vary in hardness, depending on the particular Application, vary, are sufficiently elastic, rot-proof, resistant to the medium flowing in the hydraulic system and against heat and cold as well as against aging. Due to the structure and the material properties, the damping behavior of the foam body can be adapted to the respective application.
  • the foam body may be enclosed by an elastically resilient sheathing impermeable to the medium to be stored. Such an embodiment may, for. B. then apply, if the foam body consists of a not sufficiently closed-cell foam.
  • the jacket prevents the medium to be stored from penetrating into the foam body and therefore adversely affecting the effect of the pressure-peak compensation device.
  • the pressure chamber may be provided on the inside with a coating.
  • the coating can consist of PTFE or a bonded coating and thus has friction-reducing properties.
  • Such a configuration is advantageous because the pressure compensation body is arranged loosely in the pressure vessel, therefore, can move freely and thus also touches the inner wall of the pressure chamber during the intended use of the pressure accumulator. Due to the friction-reducing coating of the inner wall of the pressure chamber, the inner wall is smooth. Friction between the pressure compensation body and the inner wall and thereby abbrassiver wear on the pressure compensation body is therefore limited to a minimum, so that the Pressure accumulator consistently good performance characteristics during a long service life.
  • the accumulator has a very low-part construction.
  • the accumulator comprises only two components, namely the pressure vessel and the pressure vessel loosely arranged pressure compensation body. Such an accumulator is easy and inexpensive to produce.
  • the pressure compensation body may have different geometries and / or be made of different materials.
  • the pressure compensating body may be, for example, annular, cylindrical or spherical.
  • a pressure compensation body as described above, can be used according to the invention in a pressure vessel of a pressure accumulator.
  • a schematically illustrated pressure accumulator is shown.
  • the pressure accumulator comprises a pressure vessel 1, the z. B. consists of a metallic material.
  • the pressure vessel 1 is connected to a hydraulic system, not shown here.
  • the pressure vessel 1 has only one pressure chamber 6, which is provided on the inside with a friction-reducing coating 7, for example made of PTFE. This coating 7 is provided in order to limit friction and thus wear on the pressure compensation body 3 arranged loosely in the pressure vessel 1 to a minimum.
  • the pressure-peak compensation device 2 is formed by the compressible pressure compensation body 3, which is arranged loosely within the pressure vessel 1.
  • the pressure compensation body 3 consists of a closed-cell polyurethane foam. About the porosity of the foam its compressibility and thus the performance characteristics of the pressure accumulator can be adjusted.
  • pressure peaks occur in the hydraulic system, these pressure peaks are damped by the pressure compensation body 3. At high pressures, the pressure compensation body 3 is compressed in the pressure chamber 6 and thereby dissipates energy. Are the pressure peaks within the hydraulic system degraded again, the pressure compensation body 3 relaxes and resumes its shape, which he had before the introduction of the pressure peak in the pressure vessel 1.
  • a pressure compensation body 3 In Fig. 2 an embodiment of a pressure compensation body 3 is shown.
  • the pressure compensation body 3 consists of a closed-cell foam body. 4
  • a further embodiment of a pressure compensation body 3 is shown.
  • This pressure compensation body 3 consists of a foam body 4 with a core 8, which is surrounded by a compressible, impermeable to the medium to be stored sheath 5. It is advantageous that the core 8 of the foam body 4 is protected by the sheath 5 from direct exposure to the medium to be stored.
  • a pressure compensation body 3 which consists of a closed-cell foam body 4 and is formed of the same material.
  • the foam body may, for example, have the shape of a cylinder or a sphere.
  • a pressure compensation body 3 is shown in a perspective view.
  • the pressure compensation body 3 shown essentially corresponds to the pressure compensation body 3 Fig. 3 ,
  • the jacket 5 on the front side of the cylindrical pressure compensation body 3 has been removed in order to show the core of the pressure compensation body 3, which is designed as a foam body 4.

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)
EP11003411A 2011-04-26 2011-04-26 Accumulateur de pression et utilisation d'un corps d'équilibrage de pression associé Withdrawn EP2518328A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11003411A EP2518328A1 (fr) 2011-04-26 2011-04-26 Accumulateur de pression et utilisation d'un corps d'équilibrage de pression associé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11003411A EP2518328A1 (fr) 2011-04-26 2011-04-26 Accumulateur de pression et utilisation d'un corps d'équilibrage de pression associé

Publications (1)

Publication Number Publication Date
EP2518328A1 true EP2518328A1 (fr) 2012-10-31

Family

ID=44358288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11003411A Withdrawn EP2518328A1 (fr) 2011-04-26 2011-04-26 Accumulateur de pression et utilisation d'un corps d'équilibrage de pression associé

Country Status (1)

Country Link
EP (1) EP2518328A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120180755A1 (en) * 2011-01-13 2012-07-19 Uwe Jung Injector
DE102014213108B3 (de) * 2014-07-07 2015-11-05 Robert Bosch Gmbh Leistungsmodul mit Fluidkühlung
GB2566094A (en) * 2017-09-04 2019-03-06 Ideal Boilers Ltd Expansion vessel incorporating a foam core
WO2021146772A1 (fr) * 2020-01-21 2021-07-29 UGT Group Pty Ltd Accumulateur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1197524A (en) * 1968-03-25 1970-07-08 Automotive Prod Co Ltd Improvements in or relating to Liquid Pressure Storage Devices
DE1650095A1 (de) * 1967-11-07 1970-08-13 Langen & Co Hydro-pneumatischer Druckspeicher
DE3333597A1 (de) * 1983-09-16 1985-04-18 Wilkhahn Wilkening + Hahne GmbH + Co, 3252 Bad Münder Druckspeicher
DE10235080B3 (de) 2002-07-31 2004-01-22 Carl Freudenberg Kg Hydropneumatischer Druckspeicher
DE102004011443A1 (de) * 2004-03-09 2005-09-22 Bosch Rexroth Ag Niederdruck-Hydrospeicher

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1650095A1 (de) * 1967-11-07 1970-08-13 Langen & Co Hydro-pneumatischer Druckspeicher
GB1197524A (en) * 1968-03-25 1970-07-08 Automotive Prod Co Ltd Improvements in or relating to Liquid Pressure Storage Devices
DE3333597A1 (de) * 1983-09-16 1985-04-18 Wilkhahn Wilkening + Hahne GmbH + Co, 3252 Bad Münder Druckspeicher
DE10235080B3 (de) 2002-07-31 2004-01-22 Carl Freudenberg Kg Hydropneumatischer Druckspeicher
DE102004011443A1 (de) * 2004-03-09 2005-09-22 Bosch Rexroth Ag Niederdruck-Hydrospeicher

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120180755A1 (en) * 2011-01-13 2012-07-19 Uwe Jung Injector
DE102014213108B3 (de) * 2014-07-07 2015-11-05 Robert Bosch Gmbh Leistungsmodul mit Fluidkühlung
GB2566094A (en) * 2017-09-04 2019-03-06 Ideal Boilers Ltd Expansion vessel incorporating a foam core
GB2566094B (en) * 2017-09-04 2021-07-14 Ideal Boilers Ltd Expansion vessel incorporating a foam core
WO2021146772A1 (fr) * 2020-01-21 2021-07-29 UGT Group Pty Ltd Accumulateur

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