EP2430318B1 - Accumulateur hydraulique - Google Patents

Accumulateur hydraulique Download PDF

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Publication number
EP2430318B1
EP2430318B1 EP10715709.1A EP10715709A EP2430318B1 EP 2430318 B1 EP2430318 B1 EP 2430318B1 EP 10715709 A EP10715709 A EP 10715709A EP 2430318 B1 EP2430318 B1 EP 2430318B1
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EP
European Patent Office
Prior art keywords
housing shell
hydraulic accumulator
housing
membrane
edge
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
EP10715709.1A
Other languages
German (de)
English (en)
Other versions
EP2430318A1 (fr
Inventor
Norbert Weber
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.)
Hydac Technology GmbH
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Hydac Technology 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
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Publication of EP2430318A1 publication Critical patent/EP2430318A1/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
    • 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
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/106—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means characterised by the way housing components are assembled
    • 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
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • 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
    • F15B2201/4056—Housings characterised by the attachment of housing components

Definitions

  • the invention relates to hydraulic accumulators with the features in the preamble of claim 1 or 11.
  • Hydraulic accumulators in hydraulic systems are used, among other things, to take up certain volumes of pressurized liquids and to give them back to the system when required.
  • Hydraulic systems with hydropneumatic accumulators with a separating element designed as a membrane are particularly widespread.
  • the membrane separates a liquid space as a working space from a gas space as a further working space.
  • the preferred working gas is nitrogen, with the membrane decoupling the gas and liquid space.
  • the fluid space is also connected to a hydraulic circuit of the system, so that when the pressure rises, the hydraulic accumulator takes up pressure medium and the gas is compressed in the process. When the pressure drops, the previously compressed gas expands again, displacing the pressure medium (hydraulic fluid) back into the hydraulic circuit.
  • a hydraulic accumulator is formed from two housing shells, which abut with their free opening edges and each one Limit partial volume or a working space of the hydraulic accumulator with the interposition of the membrane.
  • the end-to-end housing shells are usually welded to one another at the relevant joint by means of various welding processes, and depending on the welding process, it cannot be ruled out that hot metal beads or metal particles inside the hydraulic accumulator lead to damage to the membrane during the welding process. This can have a negative impact on the stability of the membrane.
  • the pressure accumulator consists of two spherical shells that are pushed into one another at the edges.
  • the outer spherical shell engages with its edge over the edge of the inner spherical shell and the edges are designed in such a way that, in the assembled state of the spherical shells, their metallic surfaces lie tightly on one another.
  • the inner spherical shell on its outer circumference and the outer spherical shell on its inner circumference each have a groove into which a snap ring is inserted.
  • a membrane is also arranged between the edges.
  • the invention has the object of specifying a hydraulic accumulator of the type under consideration, the membrane of which cannot be affected during its manufacture.
  • an essential feature of the invention is that an opening edge of the housing shell lying radially on the outside at the point of overlap is applied by reshaping to the circumference of the radially inside housing shell with the formation of a form fit.
  • the form-fit connection is preferably designed in a sealing manner and seals the interior of the memory from the environment. Furthermore, the form fit enables tensile stresses to be transmitted from the first to the second housing shell of the hydraulic accumulator. This prevents the membrane inside the hydraulic accumulator from being impaired in any way during assembly.
  • a separating element formed as a membrane made of elastomeric material comes into contact in a circumferential groove on the inside of the radially outer first housing shell and is held by an anchoring part which consists of a clamping ring that is essentially U-shaped in cross section.
  • an edge bead of the membrane is held between a hollow profile with a C-shaped cross section and drawn radially inward, which is an integral part of the upper housing shell.
  • At least one housing shell is placed against an axial stop in the interior of the accumulator housing, this being held in its end position after the opening edge of the radially outer housing shell has been deformed.
  • the wall thickness of the longitudinal edge of the opening edge coming to the forming process is reduced and a transition point from the longitudinal edge to the wall forming the working space for the pressure medium thus results in a radially inwardly directed shoulder which serves as a stop.
  • the opening edge of the housing shell lying radially on the outside at the point of overlap is attached to a connection body for the working gas, forming a connecting the stepless transition of the outer surface.
  • the opening edge is preferably connected to the connection body in a sealing manner, preferably in a materially bonded manner.
  • the separating element is formed by a membrane, the peripheral edge of which is held at the overlap of the two housing shells with an anchoring part on the radially inner and / or the radially outer housing shell.
  • the anchoring part is preferably formed from a thickened edge bead along the circumference of the membrane and from a clamping ring surrounding this edge bead radially on the inside, the clamping ring pressing the edge bead into a groove-like recess in the housing shell and axially and radially in the storage housing in a defined manner.
  • the housing shells can be formed from a light metal alloy, preferably in the form of an aluminum alloy.
  • connection bodies which are provided in one piece with these housing shells and which are positioned coaxially to the longitudinal axis of the hydraulic accumulator at opposite ends of the same. You go in one compared to the wall thickness on the connection bodies reduced wall thickness of the housing shells.
  • a hydraulic accumulator 1 in the form of a so-called diaphragm accumulator is shown in a longitudinal section.
  • Related hydraulic accumulators 1 can be used, for example, within a hydraulic system to compensate for pressure fluctuations, to store energy, to absorb pulsation shocks from a pump, etc.
  • the hydraulic accumulator 1 consists of a first housing shell 2 and a second housing shell 3, which are arranged rotationally symmetrically about a longitudinal axis 4 of the hydraulic accumulator 1.
  • the housing shells 2, 3 form a storage housing 8 and are preferably made of a lightweight construction from an aluminum alloy and are obtained in one operation by means of a press forming process or the like.
  • connection body 22 with a fluid inlet is formed in one piece with the first housing shell 2.
  • a connection body 14 for working gas, such as nitrogen, is also connected in one piece to the second housing shell 3.
  • a free opening edge 6 of the second housing shell 3 overlaps with its radial inside the first housing shell 2 along its outer circumference in the area of the upper half, in particular the upper third, viewed in the axial length of the storage housing 8.
  • a separating element 7 formed as a membrane 15 made of elastomeric material comes into contact in a circumferential groove 23 on the inside of the radially outer first housing shell 2 and is held by an anchoring part 17 which, when viewed in cross section, is essentially U-shaped Clamping ring 19 consists.
  • the clamping ring 19 is supported axially on the opening edge 6 of the second housing shell 3. Looking towards the Fig. 1 seen, the upper peripheral edge of the clamping ring 19 runs parallel and in horizontal contact with the lower foot section of the housing shell 3, the overlying annular groove-shaped cavity serving to accommodate a sealant (not shown), for example in the form of an O-ring or guide sealing tape.
  • the clamping force applied over the longitudinal edge 12 of the lower housing shell 2 is then transferred to the upper housing shell 3 and consequently to the upper part of the clamping ring 19, which in this way presses the edge bead 18 of the membrane against a step-like widening of the wall thickness of the lower housing shell 2 provided downwards and so fixes the membrane arrangement in a defined manner.
  • the membrane material is provided with a thickening, which in this way forms a valve body with which the fluid connection point can be closed as soon as the separating membrane device is brought into its lower closed position, not shown, under the influence of the working gas. So that the edge bead 18 is also supported downwards, the diameter of the clamping ring 19 in the lower area of the edge bead is again widened and in this respect also forms a support for the membrane-like separating element 7 towards the interior of the storage housing 8.
  • the beaded edge 18 is held between a hollow profile which is C-shaped in cross section and is drawn radially inward and which is an integral part of the upper housing shell 3. That is the cross section of the opening edge 6 of the second
  • the hollow profile defining the housing shell 3 is formed from a leg 20 extending radially inward and a leg 21 extending radially outward. If in the embodiment according to the Fig. 2 the same reference numerals are used as in the Fig. 1 , the statements made in this respect also apply to the further exemplary embodiment.
  • the bead 18 in turn effects a form fit in the axial direction between the two housing shells 2, 3.
  • the first housing shell 2 has a longitudinal edge 12 of reduced wall thickness, which extends axially in the manner of an encircling band along the circumferential side of the associated contact surface of the first housing shell 3. At a transition point 13, at which the wall thickness of the first housing shell 2 tapers to the longitudinal edge 12, an axial stop 11 is again formed for the second housing shell 3 to rest against the first housing shell 2.
  • the membrane 15 separates a working space 9 for working gas from a working space 10 for pressure medium, and the longitudinal edge 12 is preferably applied to the upper peripheral part of the second housing shell 3, seen in longitudinal section, by reshaping, forming an interference fit.
  • the wall thickness of the second housing shell 3 is, in order to form a resistant counter-bearing, for this purpose approximately twice as thick as the wall thickness of the first housing shell 2 in this area. In this case, it is advantageously provided that the opening edge 5 of the first housing shell 2 is connected to one another in a sealing manner with the second housing shell 3 in a materially bonded manner.
  • the bearing of the diaphragm 15 via its edge bead takes place approximately centrally in the longitudinal direction of the storage housing 8, so that the deflection movements of the diaphragm are approximately the same in both directions.
  • the bead reinforcement arranged on the bottom of the membrane 15 protects the membrane 15 even if it hits against the connection body 14 of the upper housing shell 3 in the area of the shut-off working gas connection.
  • the hydraulic accumulator shown in lightweight construction can, as shown, be produced very inexpensively and is particularly suitable for long-term operation even under high stress.

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  • 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)

Claims (11)

  1. Accumulateur hydraulique comprenant une première coque (2) de l'enveloppe et une deuxième coque (3) de l'enveloppe, qui se chevauchent chacune en ce qui concerne un axe (4) longitudinal de l'accumulateur (1) hydraulique par leurs bords (5, 6) d'ouverture dans une partie (16) d'ouverture de manière à ce qu'elles définissent un volume partiel de l'accumulateur (1) hydraulique, et comprenant un élément (7) de séparation constitué en membrane (15) en matière élastomère, qui sépare l'un de l'autre d'une manière étanche aux fluides des espaces (9, 10) de travail intérieurs de l'enveloppe (8), formés au moyen des coques (2, 3) de l'enveloppe, de l'accumulateur (1) hydraulique et dans lequel le bord (5) d'ouverture de la coque (2) de l'enveloppe se trouvant à l'extérieur radialement est mis, en formant une complémentarité de forme par déformation sur le pourtour de la coque (3) de l'enveloppe se trouvant à l'intérieur radialement, caractérisé en ce qu'au voisinage de la partie (16) de chevauchement, l'élément (7) de séparation vient en contact dans une rainure (23) de pourtour avec la face intérieure de la première coque (2) extérieure radialement de l'enveloppe et est maintenu par une partie (17) d'ancrage, qui est constituée d'un anneau (19) de serrage, sensiblement en forme de U considérée en section transversale.
  2. Accumulateur hydraulique suivant la revendication 1, caractérisé en ce que la au moins une coque (3) de l'enveloppe est insérée contre une butée (11) à intérieur de l'enveloppe (8) de l'accumulateur.
  3. Accumulateur hydraulique suivant la revendication 1 ou 2, caractérisé en ce qu'un bord (12) longitudinal du bord (5) d'ouverture, venant en déformation, de la première coque (2) de l'enveloppe est réduit en épaisseur de paroi.
  4. Accumulateur hydraulique suivant la revendication 3, caractérisé en ce qu'un point (13) de transition entre les épaisseurs de parois différentes forme la butée (11) pour la coque (3) de l'enveloppe se trouvant à l'intérieur radialement.
  5. Accumulateur hydraulique suivant l'une des revendications 1 à 4, caractérisé en ce que le bord (5) d'ouverture de la coque (2) de l'enveloppe se trouvant à l'extérieur radialement est voisine d'une pièce (14) de raccordement pour un gaz de travail et est relié à coopération de matière d'une manière étanche au gaz à la pièce (14) de raccordement.
  6. Accumulateur hydraulique suivant l'une des revendications 1 à 5, caractérisé en ce que l'élément (7) de séparation mobile est formé d'une membrane (15), dont le bord de pourtour sur la partie (16) de chevauchement des deux coques (2, 3) de l'enveloppe est maintenu par une partie (17) d'ancrage sur la coque (3) de l'enveloppe intérieure radialement et/ou la coque (2) de l'enveloppe extérieure radialement.
  7. Accumulateur hydraulique suivant la revendication 6, caractérisé en ce que la partie (17) d'ancrage est formée d'un bourrelet (8) de bord épaissi de la membrane (15) et/ou d'un anneau (19) de serrage du bord de pourtour de la membrane (15).
  8. Accumulateur hydraulique suivant l'une des revendications 1 à 6, caractérisé en ce que le bord (6) d'ouverture de la coque (3) de l'enveloppe se trouvant à l'intérieur radialement forme un profil creux à peu près en forme de C rentré vers l'intérieur radialement, qui forme une branche (20) s'étendant vers l'intérieur radialement et une branche (21) s'étendant à distance vers l'extérieur radialement, entre lesquelles le bourrelet (8) de bord de la membrane (5) peut être reçu.
  9. Accumulateur hydraulique suivant l'une des revendications 1 à 8, caractérisé en ce que les coques (2, 3) de l'enveloppe sont en un alliage en métal léger.
  10. Accumulateur hydraulique suivant l'une des revendications 1 à 9, caractérisé en ce que des raccords aux coques (2, 3) de l'enveloppe sont formées par des pièces (14, 22) de raccordement co-axiales à l'axe (4) longitudinal de l'accumulateur (1) hydraulique, auxquelles se raccorde la paroi de la coque (2, 3) respective de l'enveloppe en ayant une épaisseur de paroi diminuée par rapport à l'épaisseur de la pièce (14, 22) de raccordement.
  11. Accumulateur hydraulique, comprenant une première coque (2) de l'enveloppe et une deuxième coque (3) de l'enveloppe, qui se chevauchent chacune en ce qui concerne un axe (4) longitudinal de l'accumulateur (1) hydraulique par leurs bords (5, 6) d'ouverture dans une partie (16) d'ouverture de manière à ce qu'elles définissent un volume partiel de l'accumulateur (1) hydraulique, et comprenant un élément (7) de séparation constitué en membrane (15) en matière élastomère, qui sépare l'un de l'autre d'une manière étanche aux fluides des espaces (9, 10) de travail intérieurs de l'enveloppe (8), formés au moyen des coques (2, 3) de l'enveloppe, de l'accumulateur (1) hydraulique et dans lequel le bord (5) d'ouverture de la coque (2) de l'enveloppe se trouvant à l'extérieur radialement est mis, en formant une complémentarité de forme, par déformation sur le pourtour de la coque (3) de l'enveloppe se trouvant à l'intérieur radialement, caractérisé en ce qu'au voisinage de la partie (16) de chevauchement, l'élément (7) de séparation vient en contact dans une rainure (23) de pourtour avec la face intérieure de la première coque (2) extérieure radialement de l'enveloppe et en ce qu'un bourrelet (18) de bord de la membrane (15) est maintenu entre un profil (20, 21) creux, en forme de C en section transversale, rentré vers l'intérieur radialement, qui est une partie constitutive en une pièce de la coque (3) supérieure de l'enveloppe.
EP10715709.1A 2009-05-15 2010-04-22 Accumulateur hydraulique Active EP2430318B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009021463A DE102009021463A1 (de) 2009-05-15 2009-05-15 Hydrospeicher
PCT/EP2010/002465 WO2010130332A1 (fr) 2009-05-15 2010-04-22 Accumulateur hydraulique

Publications (2)

Publication Number Publication Date
EP2430318A1 EP2430318A1 (fr) 2012-03-21
EP2430318B1 true EP2430318B1 (fr) 2021-06-09

Family

ID=42497093

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10715709.1A Active EP2430318B1 (fr) 2009-05-15 2010-04-22 Accumulateur hydraulique

Country Status (6)

Country Link
US (1) US8746286B2 (fr)
EP (1) EP2430318B1 (fr)
JP (1) JP5695032B2 (fr)
CN (1) CN102428283A (fr)
DE (1) DE102009021463A1 (fr)
WO (1) WO2010130332A1 (fr)

Families Citing this family (10)

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WO2013071985A1 (fr) 2011-11-17 2013-05-23 Carl Freudenberg Kg Accumulateur hydraulique
BE1021285B1 (nl) * 2013-05-17 2015-10-20 Hydra Parts N.V. Verbeterde werkwijze
DE102014005511A1 (de) 2014-04-12 2015-10-15 Hydac Technology Gmbh Speichereinrichtungen und Montageverfahren zum Herstellen von solchen Speichereinrichtungen
WO2015183873A1 (fr) * 2014-05-28 2015-12-03 Flexcon Industries, Inc. Connecteur passe-paroi pour récipient sous pression multi-chambre
DE102015003673A1 (de) * 2015-03-20 2016-09-22 Hydac Technology Gmbh Verfahren zum Herstellen eines Schaumkörpers
CN106112415B (zh) * 2016-08-26 2018-08-17 浙江铂达科技有限公司 一种隔膜蓄能器的制造方法
DE102018003644A1 (de) * 2018-05-04 2019-11-07 Hydac Technology Gmbh Dämpfungsvorrichtung
GB2583541B (en) * 2019-05-03 2023-05-10 Polar Tech Management Group Limited Accumulator arrangement
CN111706739A (zh) * 2020-06-24 2020-09-25 华中科技大学 一种分频组合压力脉动衰减装置及方法
WO2022266373A1 (fr) * 2021-06-16 2022-12-22 Performance Pulsation Control, Inc. Bague de compression radiale à diaphragme (drcr tm) permettant d'améliorer la capacité d'étanchéité et la durée de vie des diaphragmes utilisés dans des amortisseurs/des accumulateurs/un équipement de commande de pulsations

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Also Published As

Publication number Publication date
JP5695032B2 (ja) 2015-04-01
US20120037253A1 (en) 2012-02-16
JP2012526951A (ja) 2012-11-01
US8746286B2 (en) 2014-06-10
WO2010130332A1 (fr) 2010-11-18
CN102428283A (zh) 2012-04-25
EP2430318A1 (fr) 2012-03-21
DE102009021463A1 (de) 2010-11-18

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