EP3421818A1 - Accumulateur hydraulique - Google Patents

Accumulateur hydraulique Download PDF

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Publication number
EP3421818A1
EP3421818A1 EP18177868.9A EP18177868A EP3421818A1 EP 3421818 A1 EP3421818 A1 EP 3421818A1 EP 18177868 A EP18177868 A EP 18177868A EP 3421818 A1 EP3421818 A1 EP 3421818A1
Authority
EP
European Patent Office
Prior art keywords
membrane
opening edge
hydraulic accumulator
housing
accumulator according
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
EP18177868.9A
Other languages
German (de)
English (en)
Other versions
EP3421818B1 (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
Original Assignee
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
Application filed by Hydac Technology GmbH filed Critical Hydac Technology GmbH
Publication of EP3421818A1 publication Critical patent/EP3421818A1/fr
Application granted granted Critical
Publication of EP3421818B1 publication Critical patent/EP3421818B1/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
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/12—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery
    • F15B1/14—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery by means of a rigid annular supporting member
    • 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
    • F15B2201/315—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
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3156—Accumulator separating means having flexible separating means characterised by their attachment
    • 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
    • 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
    • F15B2201/43—Anti-extrusion means
    • F15B2201/435—Anti-extrusion means being fixed to the separating means
    • 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
    • F15B2201/60—Assembling or methods for making accumulators
    • F15B2201/605—Assembling or methods for making housings therefor

Definitions

  • the invention relates to a hydraulic accumulator, with a housing defining a longitudinal axis, in which a membrane consisting of elastomeric material as a movable separating element separates a liquid side from a gas side, wherein the membrane is fixed at its opening edge on the inside of the housing.
  • Hydraulic accumulators in the form of membrane accumulators are known, cf. DE 34 04 897 A1 or DE 41 31 524 A1 .
  • the housing in the membrane surrounding the housing part has a spherical shape.
  • the invention has for its object to provide a hydraulic accumulator in the form of a membrane memory available whose gas side, despite the slim design of the housing, has a high volume.
  • a significant feature of the invention is that the membrane in the undeformed state has a measured length along the longitudinal axis, which is at least twice the diameter of the opening edge, and that the undeformed membrane between the opening edge and its closed end region with straight generatrices which converge conically towards the end region.
  • a high volume of the gas side can be realized with a slender storage housing adapted to the shape of the membrane, comparable to a bubble reservoir.
  • the undeformed length of the membrane is at least 2.5 times the diameter of the free opening of the opening edge.
  • a relatively flat conical shape is provided for the main part of the membrane, in which the generatrices extending from the opening edge to the end region of the undeformed membrane converge to the longitudinal axis at an angle between 1.5 ° and 3 °.
  • the end of the membrane adjoining the straight generating lines is hemispherically curved.
  • the housing has a main part in the form of an elongated, circular-cylindrical, a closed bottom part having pot, wherein the opening edge of the membrane is fixed in the main part in the vicinity of the open end of the pot.
  • the pot is closed at the open end by a welded to the one edge of the pot edge, the curved head part.
  • the arrangement is advantageously made so that an annular groove-like notch is formed for the thickening in the inner wall of the housing, in which the thickening is held by a retaining ring, the one thickening Has partially comprehensive holding part.
  • the retaining ring on a ring of resilient fingers projecting away from the holding part in the direction of the head portion axially beyond the welding area and form a seat for a metallic guard ring, which covers the welding area between the pot and headboard inside.
  • the guard ring forms a thermal shield between the welding area and the retaining ring, so that it can be produced from a plastic material in an injection molding process in a rational and cost-effective manner.
  • the illustrated embodiment of the hydraulic accumulator according to the invention comprises a two-part housing 2 made of metallic material, which extends along a longitudinal axis 4 and has a main part in the form of a circular cylindrical pot 6 with a bottom part 8. This is arched in a circular arc and closed except for a coaxial to the axis 4 connection 10, which forms the hydraulic fluid access to the liquid side 12 in the housing 2.
  • a head part 14 is welded to the edge of the pot 6 at the open end of the pot 6 along a welding region 16, in the present example by means of an electron-welding process.
  • the head part 14 which has a similar curved shape as the bottom part 8, is closed except for a coaxial port 18, which forms the access for a working gas, such as N 2 , to the gas side 20 located inside the housing.
  • a working gas such as N 2
  • An optionally located on the port 18 filling valve and an associated pipe are not shown, as well as the connection of the located at the bottom part 8 terminal 10 is omitted with an associated hydraulic system.
  • the housing 2 with the elongated body formed by the pot 6 is in the form of a slender storage bottle receiving within the pot 6 an elastomeric membrane 22 having a correspondingly slender, elongated shape in the undeformed state shown in the figure.
  • the undeformed membrane 22 forms between its opening edge 24 and a transition point 26 to the end portion 28 a flat, elongated cone with straight generating lines 30.
  • the adjoining the transition point 26, curved end portion 28 has, as in the known diaphragm accumulators, an end reinforcement 32 ,
  • the membrane 22 has a bead-like thickening 34 at the opening edge 24.
  • the membrane 22 is formed in the pot 6 at a small distance from the welding area 16 forming pot end in the inner wall an annular groove-like notch 36 which forms a seat for the bead-like thickening 34.
  • a retaining ring 38 which has a holding part 40 which forms a from the outer periphery of the retaining ring 38 inwardly offset, partially enclosing the inside of the thickening 34.
  • the retaining ring 38 Extending axially from the holding portion 40 toward the head portion 14, the retaining ring 38 includes a rim of compliant fingers 42 separated by slots 44 and extending beyond the weld area 16.
  • the fingers 42 form an annular groove 46 as a seat for a guard ring 48, which is formed by a metallic flat ring. This can be snapped by sliding over inclined surfaces at the ends of the fingers 42 in the annular groove 46.
  • the membrane 22 is inserted with the pot 6 open together with the retaining ring 38 and the guard ring 48 in the pot 6, wherein in the inserted position of the guard ring 48 in a welding region 16 overlapping position.
  • a plastic material may advantageously be provided a glass fiber reinforced polyarylamide.
  • the undeformed membrane 22 in the direction of the axis 4 has a length which is a multiple of the diameter at the opening edge 24.
  • the undeformed length is approximately 2.5 times the diameter of the free opening of the opening edge 24.
  • the generatrices 30 of the opening between the edge 24th and end portion 28 extending, flat cone of the diaphragm 22 converge to the longitudinal axis 4 at a low angle, in the illustrated embodiment at an angle of 2 °. In this configuration, in comparison with the known diaphragm accumulators, an optimum ratio between the outer diameter of the housing 2 and usable volume of working gas in the gas side 20 results.

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)
EP18177868.9A 2017-06-27 2018-06-14 Accumulateur hydraulique Active EP3421818B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017006064.9A DE102017006064A1 (de) 2017-06-27 2017-06-27 Hydrospeicher

Publications (2)

Publication Number Publication Date
EP3421818A1 true EP3421818A1 (fr) 2019-01-02
EP3421818B1 EP3421818B1 (fr) 2021-12-29

Family

ID=62684636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18177868.9A Active EP3421818B1 (fr) 2017-06-27 2018-06-14 Accumulateur hydraulique

Country Status (3)

Country Link
EP (1) EP3421818B1 (fr)
DE (1) DE102017006064A1 (fr)
MA (1) MA46372A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025247666A3 (fr) * 2024-05-28 2026-02-19 Hydac Technology Gmbh Procédé

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021000139A1 (de) 2021-01-14 2022-07-14 Hydac Technology Gmbh Hydrospeicher

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1525961A1 (de) * 1967-02-24 1970-01-15 Elmer Dipl Ing Adam Hydrospeicher
DE2604959A1 (de) * 1975-02-24 1976-09-02 Greer Hydraulics Inc Druckbehaelter und verfahren zu seiner herstellung
DE4131524A1 (de) * 1991-09-21 1993-04-01 Hydac Technology Gmbh Membranspeicher mit befestigungsring

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847182A (en) * 1973-06-18 1974-11-12 E Greer Hydro-pneumatic flexible bladder accumulator
US4427028A (en) * 1979-11-13 1984-01-24 Vsi Corporation Resistance welded accumulator device
DE3404897A1 (de) 1984-02-11 1985-08-14 Integral Hydraulik & Co, 4000 Düsseldorf Hydrospeicher
DE29718588U1 (de) * 1997-10-20 1998-01-15 Böhm, Klaus, 09128 Chemnitz Hydropneumatischer Druckspeicher

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1525961A1 (de) * 1967-02-24 1970-01-15 Elmer Dipl Ing Adam Hydrospeicher
DE2604959A1 (de) * 1975-02-24 1976-09-02 Greer Hydraulics Inc Druckbehaelter und verfahren zu seiner herstellung
DE4131524A1 (de) * 1991-09-21 1993-04-01 Hydac Technology Gmbh Membranspeicher mit befestigungsring

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025247666A3 (fr) * 2024-05-28 2026-02-19 Hydac Technology Gmbh Procédé

Also Published As

Publication number Publication date
EP3421818B1 (fr) 2021-12-29
MA46372A (fr) 2019-08-07
DE102017006064A1 (de) 2018-12-27

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