EP3418583B1 - Akkumulator - Google Patents

Akkumulator Download PDF

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Publication number
EP3418583B1
EP3418583B1 EP17752981.5A EP17752981A EP3418583B1 EP 3418583 B1 EP3418583 B1 EP 3418583B1 EP 17752981 A EP17752981 A EP 17752981A EP 3418583 B1 EP3418583 B1 EP 3418583B1
Authority
EP
European Patent Office
Prior art keywords
diameter
bladder
peripheral edge
edge portion
side bladder
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
EP17752981.5A
Other languages
English (en)
French (fr)
Other versions
EP3418583A1 (de
EP3418583A4 (de
Inventor
Shinya Kamimura
Katsumi Matsui
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.)
Eagle Industry Co Ltd
Original Assignee
Eagle Industry Co Ltd
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Filing date
Publication date
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Publication of EP3418583A1 publication Critical patent/EP3418583A1/de
Publication of EP3418583A4 publication Critical patent/EP3418583A4/de
Application granted granted Critical
Publication of EP3418583B1 publication Critical patent/EP3418583B1/de
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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
    • F15B2201/3155—Accumulator separating means having flexible separating means characterised by the material of the flexible 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
    • F15B2201/30—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
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3157—Sealings for the flexible 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
    • F15B2201/30—Accumulator separating means
    • F15B2201/32—Accumulator separating means having multiple separating means, e.g. with an auxiliary piston sliding within a main piston, multiple membranes or combinations thereof
    • 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
    • F15B2201/61—Assembling or methods for making separating means therefor

Definitions

  • the present invention relates to an accumulator configured such that a bladder is disposed on the inside of a shell to divide an internal space of the shell into a gas chamber and a liquid chamber.
  • a bladder type of accumulator which is configured such that a peripheral edge portion of a bladder is in close contact with an inner peripheral face of a shell to divide an internal space of the shell into a gas chamber and a liquid chamber.
  • an accumulator having a bladder structure made of two materials consisting of a first material with favorable gas shielding properties and a second material with favorable liquid resistance has been proposed, the material with favorable gas shielding properties being used as the material of a bladder disposed on a gas side and the material with favorable liquid resistance being used as the material of a bladder disposed on a liquid chamber side (e.g., Patent Citation 1).
  • Patent Citation 1 Japanese Laid-open Utility Model Publication 2-128801 ( FIG. 1 )
  • a bladder-type accumulator in US5117873 , includes a hollow housing having an inner wall surface including a cylindrical surface of a predetermined width, a sheet-like elastically flexible bladder disposed in the hollow housing and dividing an interior space of the hollow housing into a first fluid chamber and a second fluid chamber and a holder which holds a peripheral edge of the bladder against the cylindrical surface of the hollow housing.
  • the peripheral edge of the bladder is shaped such that a relatively large pressure will be applied to at least a partial annular area, having a predetermined width, of the bladder along the peripheral edge thereof.
  • JPH0484803U discloses a bladder for accumulator.
  • a gas shielding material (forming an inner-diameter-side bladder) and a liquid resistant material (forming an outer-diameter-side bladder) do not come into sufficient close contact with each other at a peripheral edge portion of the bladder made of the two materials. For this reason, gas enters a space between the gas shielding material and the liquid resistant material through a joint between the gas shielding material and the liquid resistant material. This leads to the following problems: after the entering, the gas leaks to the liquid chamber through the liquid resistant material having low gas shielding properties, or remains between the gas shielding material and the liquid resistant material to degrade the function as an accumulator.
  • the present invention has been made in view of such problems, and is intended to provide an accumulator having excellent sealing performance at a joint between bladders.
  • an accumulator with the features set forth in claim 1 comprises a shell and a bladder disposed on the inside of a shell to divide an internal space of the shell into a gas chamber and a liquid chamber.
  • the bladder comprises an outer-diameter-side bladder having a peripheral edge portion disposed on an inner peripheral portion of the shell, and an inner-diameter-side bladder disposed on an inside of the outer-diameter-side bladder and having a peripheral edge portion formed to protrude toward an inner diameter side.
  • the accumulator further comprises a holder configured to face the inner peripheral portion of the shell to hold, from the inner diameter side, the peripheral edge portion of the outer-diameter-side bladder and the peripheral edge portion of the inner-diameter-side bladder.
  • the peripheral edge portion of the outer-diameter-side bladder includes, on an outer diameter side thereof, an outer annular protrusion
  • the peripheral edge portion of the inner-diameter-side bladder includes, on the inner diameter side thereof, an inner annular protrusion configured to contact the holder.
  • the inner annular protrusion of the peripheral edge portion of the inner-diameter-side bladder and the outer annular protrusion of the peripheral edge portion of the outer-diameter-side bladder can be compressed in a radial direction by compression force of the holder in the radial direction, and thus a great tightening margin can be ensured. As a result, sealing performance at a joint between the bladders can be improved.
  • the accumulator may be characterized in that the inner-diameter-side bladder is made of a material having low gas permeability, the outer-diameter-side bladder is made of a material having liquid resistance, the gas chamber is disposed on the inner diameter side of the inner-diameter-side bladder, and the liquid chamber is disposed on the outer diameter side of the outer-diameter-side bladder.
  • the inner-diameter-side bladder made of the material having low gas permeability (specifically having lower gas permeability than that on the side of the liquid chamber and resistance to deterioration) is disposed on the side of the gas chamber
  • the outer-diameter-side bladder made of the material having liquid resistance (specifically having resistance to deterioration and swelling due to liquid) is used on the side of the liquid chamber.
  • the two bladders can be provided as one bladder not allowing gas transmission and not deteriorated due to liquid, and the structure can be made such that leakage of liquid on one side to the fluid chamber on the other side is prevented by each bladder.
  • the accumulator is characterized in that the peripheral edge portion of the inner-diameter-side bladder further includes, on the outer diameter side thereof, an outer annular protrusion.
  • the inner annular protrusion and the outer annular protrusion are provided so that for gas with small fluid particles, its leakage can be prevented. This means that the gas can be prevented from entering the liquid chamber or a space between the two bladders.
  • the inner annular protrusion of the inner-diameter-side bladder is provided at a position facing the outer annular protrusion of the outer-diameter-side bladder or the outer annular protrusion of the inner-diameter-side bladder.
  • the inner annular protrusion of the inner-diameter-side bladder is pressed against the outer annular protrusion of the outer-diameter-side bladder or the outer annular protrusion of the inner-diameter-side bladder so that a great tightening margin can be ensured.
  • sealing performance between the shell and the bladder and between the bladders can be ensured.
  • the peripheral edge portion of the outer-diameter-side bladder is, in a nesting manner, surrounded by the peripheral edge portion of the inner-diameter-side bladder.
  • the peripheral edge portion of the outer-diameter-side bladder is, in the nesting manner, surrounded by the peripheral edge portion of the inner-diameter-side bladder, and therefore, sealing performance between the outer-diameter-side bladder and the inner-diameter-side bladder can be ensured.
  • the peripheral edge portion of the outer-diameter-side bladder further includes, on the inner diameter side thereof, an inner annular protrusion.
  • the peripheral edge portion of the outer-diameter-side bladder can further ensure a great tightening margin by the outer annular protrusion of the inner-diameter-side bladder, and thus sealing performance between the outer-diameter-side bladder and the inner-diameter-side bladder can be ensured.
  • the accumulator 10 mainly includes a shell 20, a bladder 30 disposed on an inner peripheral portion 20b of the shell 20 to divide an internal space of the shell 20 into a gas chamber G and a liquid chamber R, and a holder 40 configured to face the shell 20 to hold a peripheral edge portion 30a of the bladder 30 from an inner diameter side, i.e., an inner side of the accumulator.
  • the shell 20 is made of metal and is formed as a spherical body defining hemispherical portions 21, 22 to have a step portion to be engaged with the holder 40 and including a substantially spherical cavity inside.
  • the hemispherical portion 21 is provided in a bottom portion thereof with an opening 21a, and a liquid port member 23 is welded and fixed to the opening 21a.
  • a gas plug 24 is detachably disposed at a bottom portion of the hemispherical portion 22 in opposition to the opening 21a.
  • the bladder 30 is a film body having flexibility, and has, in a pressure-free state, a double-layered structure of an outer-diameter-side bladder 31 disposed facing the inner peripheral portion 20b of the shell 20 and an inner-diameter-side bladder 32 disposed on the inner diameter side of the outer-diameter-side bladder 31.
  • the outer-diameter-side bladder 31 is made of a liquid resistant material, such as rubber or a resin film, having resistance to deterioration due to liquid such as oil and keeping high sealing performance even when the material contacts the liquid.
  • the inner-diameter-side bladder 32 is made of a gas shielding material, such as rubber or a resin film, having resistance to deterioration even when the material contacts gas such as nitrogen, not allowing gas transmission, and having high shielding properties.
  • the peripheral edge portion 30a of the bladder 30 includes a peripheral edge portion 31a of the outer-diameter-side bladder 31, and a peripheral edge portion 32a of the inner-diameter-side bladder 32.
  • the peripheral edge portion 31a and the peripheral edge portion 32a each contact the inner peripheral portion 20b of the shell 20, and the internal space of the shell 20 is hermetically divided into the gas chamber G filled with gas and the liquid chamber R filled with liquid such as oil.
  • the outer-diameter-side bladder 31 includes the annular peripheral edge portion 31a having a substantially rectangular cross section and thickly formed to protrude toward the inner diameter side, and a film body portion 31f extending in a bowl shape along the entire circumference from a lower end portion 31e of the annular peripheral edge portion 31a.
  • the peripheral edge portion 31a is provided on an outer peripheral portion 31b thereof with an annular protrusion 31g protruding outward in a radial direction from the outer peripheral portion 31b along the entire circumference thereof, and the annular protrusion 31g contacts the inner peripheral portion 20b of the shell 20 to seal the liquid.
  • the inner-diameter-side bladder 32 includes the annular peripheral edge portion 32a formed in a substantially angular U-shape in cross section, and a film body portion 32f extending in a bowl shape from a lower end portion 32e of the annular peripheral edge portion 32a along the entire circumference.
  • the peripheral edge portion 32a includes an upper end portion 32c covering an upper end portion 31c of the peripheral edge portion 31a of the outer-diameter-side bladder 31 along the entire circumference, an inner peripheral portion 32d covering an inner peripheral portion 31d of the peripheral edge portion 31a along the entire circumference, and the lower end portion 32e covering the lower end portion 31e of the peripheral edge portion 31a along the entire circumference.
  • the peripheral edge portion 32a of the inner-diameter-side bladder 32 having the substantially angular U-shaped cross section is disposed to cover, from an inner peripheral side, the peripheral edge portion 31a of the outer-diameter-side bladder 31 having the substantially rectangular cross section in a nesting manner.
  • the upper end portion 32c of the peripheral edge portion 32a of the inner-diameter-side bladder 32 is provided on an outer peripheral portion thereof with an annular protrusion 32g formed outward in the radial direction along the entire circumference of the upper end portion 32c, and the annular protrusion 32g is brought into contact with the inner peripheral portion 20b of the shell 20 to seal the gas.
  • peripheral edge portion 32a of the inner-diameter-side bladder 32 is provided on the inner peripheral portion 32d thereof with an annular protrusion 32h protruding inward in the radial direction from the inner peripheral portion 32d along the entire circumference thereof.
  • the annular protrusion 32h is pressed and held by the inner peripheral portion 20b of the shell 20 and the below-described holder 40 so that the peripheral edge portion 31a of the outer-diameter-side bladder 31 and the peripheral edge portion 32a of the inner-diameter-side bladder 32 can be compressed in the radial direction to ensure a great tightening margin and enhance sealing performance.
  • the holder 40 is disposed at the peripheral edge portion 30a of the bladder 30 for pressing and holding the peripheral edge portion 30a toward the inner peripheral portion 20b of the shell 20 is, from the inner diameter side of the peripheral edge portion 30a.
  • the holder 40 is formed in a substantially L-shape in cross section.
  • the holder 40 includes an annular flange portion 40a extending in the radial direction, and an annular extending portion 40b extending from an inner diameter portion of the flange portion 40a in an axial direction.
  • the extending portion 40b of the holder 40 is formed to have a greater diameter than that of the inner peripheral portion 32d of the peripheral edge portion 30a of the bladder 30 (see FIG. 2A ).
  • the peripheral edge portion 30a of the bladder 30 is compressed between the holder 40 and the inner peripheral portion 20b of the shell 20.
  • the annular protrusion 31g of the peripheral edge portion 31a of the outer-diameter-side bladder 31 and the annular protrusion 32g of the peripheral edge portion 32a of the inner-diameter-side bladder 32 are further compressed in the radial direction. This can ensure to provide a great tightening margin, and can enhance sealing performance.
  • the annular protrusion 31g of the outer-diameter-side bladder 31 is tightly in contact with the inner peripheral portion 20b of the shell 20 to seal the liquid
  • the annular protrusion 32h of the inner-diameter-side bladder 32 is also tightly in contact with the inner peripheral portion 20b of the shell 20 to seal the gas.
  • sealing performance for the liquid and the gas can be maintained without allowing the liquid and the gas to enter a space between the annular protrusion 31g and the annular protrusion 32g.
  • the inner peripheral portion of the peripheral edge portion 30a of the bladder 30, i.e., the inner peripheral portion 30d of the inner-diameter-side bladder 32, further includes the annular protrusion 32h.
  • the annular protrusion 32h when the annular protrusion 32h is compressed between the holder 40 and the inner peripheral portion 20b of the shell 20, greater compression force is generated at the peripheral edge portion 30a of the bladder 30, and as a result the annular protrusion 31g of the outer-diameter-side bladder 31 and the annular protrusion 32g of the inner-diameter-side bladder 32 are more tightly in contact with the inner peripheral portion 20b of the shell 20 so that sealing performance can be further enhanced.
  • annular protrusion 31g of the peripheral edge portion 31a of the outer-diameter-side bladder 31 and the annular protrusion 32h of the peripheral edge portion 32a of the inner-diameter-side bladder 32 are formed at opposing positions, and therefore, a greater tightening margin can be ensured.
  • the accumulator 50 mainly includes a shell 60, a bladder 70 disposed on an inner peripheral portion 60b of the shell 60 to divide an internal space of the shell into a gas chamber G and a liquid chamber R, a gas port member 61 (a holder of the present invention) having one end provided with an opening for gas injection and configured to face the inner peripheral portion 60b of the shell 60 to press and hold, from an inner diameter side, a peripheral edge portion 70a of the bladder 70, and a plug 62 configured to retainably support the gas port member 61 in an axial direction.
  • the shell 60 is formed of a cylindrical member made of metal, opening at an upper end thereof, and having a closed bottom to form a cavity inside.
  • the shell 60 is provided in a bottom portion thereof with a hole 60a, and, e.g., a liquid port is hermetically connected to the hole 60a.
  • An upper end portion of the shell 60 is provided on an inner peripheral face thereof with an internal thread potion 63, and the plug 62 with an external thread portion is screwed into the internal thread potion 63. In this manner, the gas port member 61 is supported.
  • the bladder 70 is a cylindrical film body having flexibility and having a closed bottom in a pressure-free state.
  • the bladder 70 has, in a pressure-free state, a double-layered structure of an outer-diameter-side bladder 71 disposed facing the inner peripheral portion 60b of the shell 60 and an inner-diameter-side bladder 72 disposed on the inner diameter side of the outer-diameter-side bladder 71.
  • the outer-diameter-side bladder 71 is made of a liquid resistant material, such as rubber or a resin film, having resistance to deterioration due to liquid such as oil and high sealing performance even when the material contacts the liquid.
  • the inner-diameter-side bladder 72 is made of a gas shielding material, such as rubber or a resin film, having resistance to deterioration due to gas, not allowing gas transmission, and having high shielding properties.
  • the peripheral edge portion 70a of the bladder 70 includes a peripheral edge portion 71a of the outer-diameter-side bladder 71, and a peripheral edge portion 72a of the inner-diameter-side bladder 72.
  • the peripheral edge portion 71a of the outer-diameter-side bladder 71 is brought into contact with the inner peripheral portion 60b of the shell 60, and the peripheral edge portion 72a of the inner-diameter-side bladder 72 is brought into contact with an inner peripheral portion of the outer-diameter-side bladder 71.
  • the cavity is hermetically divided into the gas chamber G filled with gas and the liquid chamber R filled with liquid such as oil.
  • the outer-diameter-side bladder 71 includes thickly-formed annular peripheral edge portions 71b, 71c having a substantially rectangular cross section, an annular portion 71d connecting the peripheral edge portions 71b, 71c, and a cylindrical portion 71f having a closed bottom and extending from a lower end portion of the peripheral edge portion 71c along the entire circumference.
  • peripheral edge portions 71b, 71c are provided on outer peripheral portions thereof with annular protrusions 71g, 71e, respectively, each of which protrudes outward in a radial direction along the entire circumference thereof, and the peripheral edge portions 71b, 71c are provided on inner peripheral portions thereof with annular protrusions 71h, 71j respectively, each of which protrudes inward in the radial direction along the entire circumference thereof.
  • the peripheral edge portions 71b, 71c are compressed between the gas port member 61 and the inner peripheral portion 60b of the shell 60, and the peripheral edge portions 71b, 71c of the outer-diameter-side bladder 71 are sealed in close contact with the gas port member 61 and the inner peripheral portion 60b of the shell 60.
  • the annular protrusions 71g, 71e formed respectively at the outer peripheral portions of the peripheral edge portions 71b, 71c and the annular protrusions 71h, 71j formed respectively at the inner peripheral portions of the peripheral edge portions 71b, 71c are compressed in the radial direction between the gas port member 61 and the inner peripheral portion 60b of the shell 60, thereby ensuring a great tightening margin.
  • the peripheral edge portions 71b, 71c of the outer-diameter-side bladder 71 are more tightly in contact with the gas port member 61 and the shell 60 so that sealing performance can be enhanced.
  • the inner-diameter-side bladder 72 includes a thickly-formed annular peripheral edge portion 72b having a substantially rectangular cross section, and a cylindrical portion 72f having a closed bottom and extending from a lower end portion of the peripheral edge portion 72b along the entire circumference.
  • the annular peripheral edge portion 72b is provided on an outer peripheral portion thereof with two annular protrusions 72g, 72e each protruding outward in the radial direction along the entire circumference thereof, and the peripheral edge portion 72b is provided on an inner peripheral portion thereof with a single annular protrusion 72h protruding inward in the radial direction along the entire circumference thereof.
  • the inner peripheral portion of the peripheral edge portion 72b of the inner-diameter-side bladder 72 is pressed and held by the metal gas port member 61, and is sealed by a surface pressure generated between the inner peripheral portion of the peripheral edge portion 72b and the metal gas port member 61.
  • the outer peripheral portion of the peripheral edge portion 72b is sealed by a surface pressure generated between the rubber peripheral edge portion 72b and the rubber cylindrical portion 71f of the outer-diameter-side bladder 71.
  • the surface pressure generated by the contact between rubber and rubber is lower than the surface pressure generated by the contact between metal and rubber, and for this reason, sealing performance between the rubber peripheral edge portion 72b and the rubber cylindrical portion 71f is lowered.
  • the two annular protrusions 72g, 72e are provided on the outer peripheral portion of the peripheral edge portion 72b, and the single annular protrusion 72h is further provided on the inner peripheral portion of the peripheral edge portion 72bc.
  • the annular protrusions 72g, 72e, 72h and the cylindrical portion 71f are compressed between the shell 60 and the metal gas port member 61 so that a great surface pressure can be generated between the rubber peripheral edge portion 72b and the rubber cylindrical portion 71f. Consequently, sealing can be reliably made between the peripheral edge portion 72b of the inner-diameter-side bladder 72 and the cylindrical portion 71f of the outer-diameter-side bladder 71.
  • annular raised portions 61a, 61b, 61c are formed at an outer peripheral portion of the gas port member 61.
  • the annular raised portions 61a, 61b, 61c are, in a close contact state, fitted respectively in recessed portions 73a, 73b of the outer-diameter-side bladder 71 and an end portion 73c of the inner-diameter-side bladder 72, thereby forming a labyrinth. This can further improve sealing performance of gas and a gaseous substance.
  • the peripheral edge portion 30a of the bladder 30 is provided with the annular protrusion 31g on an outer diameter side, i.e., an outer side of the accumulator and the annular protrusion 32h on the inner diameter side.
  • an annular protrusion may be further provided on the outer diameter side of the inner-diameter-side bladder 32 at a position corresponding to the annular protrusion 32h such that a great tightening margin is provided by further compressing the peripheral edge portion 30a of the bladder 30 in the radial direction. In this manner, sealing performance can be improved.
  • the further annular protrusion may be provided on one of the outer-diameter-side bladder 31 or the inner-diameter-side bladder 32, or may be provided on both of the outer-diameter-side bladder 31 and the inner-diameter-side bladder 32.
  • the space between the peripheral edge portion of the outer-diameter-side bladder and the peripheral edge portion of the inner-diameter-side bladder is sealed by the surface pressure generated therebetween.
  • the peripheral edge portion of the outer-diameter-side bladder and the peripheral edge portion of the inner-diameter-side bladder may be bonded together with, e.g., an adhesive, and in this manner, the surface pressure may be used in combination with bonding.

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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 (2)

  1. Akkumulator (50), umfassend eine Verkleidung (60) und einer Blase (70), die an einer Innenseite der Verkleidung (60) angeordnet ist, um einen Innenraum der Verkleidung (60) in eine Gaskammer (G) und eine Flüssigkeitskammer (R) zu unterteilen, wobei die Blase (70) umfasst:
    eine Außendurchmesser-Seitenblase (71) mit einem Umfangskantenabschnitt (71a), der an einem inneren Umfangsabschnitt (60b) der Verkleidung (60) angeordnet ist; und
    eine Innendurchmesser-Seitenblase (72), die an einer Innenseite der Außendurchmesser-Seitenblase (71) angeordnet ist und einen Umfangskantenabschnitt (72a) aufweist, der so ausgebildet ist, dass er in Richtung einer Innendurchmesserseite der Innendurchmesser-Seitenblase (72) vorsteht,
    wobei der Akkumulator (50) ferner einen Halter (61) umfasst, der so konfiguriert ist, dass er dem inneren Umfangsabschnitt (60b) der Verkleidung (60) zugewandt ist, um von der Innendurchmesserseite der Innendurchmesser-Seitenblase (72) den Umfangskantenabschnitt (71a) der Außendurchmesser-Seitenblase (71) und den Umfangskantenabschnitt (72a) der Innendurchmesser-Seitenblase (72) zu halten,
    wobei der Umfangskantenabschnitt (71a) der Außendurchmesser-Seitenblase (71) auf einer Außendurchmesserseite davon einen äußeren ringförmigen Vorsprung (71e, 71g) enthält, und wobei der Umfangskantenabschnitt (72a) der Innendurchmesser-Seitenblase (72) auf der Innendurchmesserseite davon einen inneren ringförmigen Vorsprung (72h) enthält, der so konfiguriert ist, dass er den Halter berührt,
    wobei der Umfangskantenabschnitt (71a) der Außendurchmesser-Seitenblase (71) ferner auf der Innendurchmesserseite davon einen inneren ringförmigen Vorsprung (71h, 71j) enthält, und
    den Akkumulator (50), dadurch gekennzeichnet, dass der Umfangskantenabschnitt (72a) der Innendurchmesser-Seitenblase (72) ferner an der Außendurchmesserseite davon einen äußeren ringförmigen Vorsprung (72e, 72g) enthält.
  2. Akkumulator (50) nach Anspruch 1, wobei
    die Innendurchmesser-Seitenblase (72) aus einem Material mit geringer Gasdurchlässigkeit besteht,
    die Außendurchmesser-Seitenblase (71) aus einem Material mit Flüssigkeitsbeständigkeit besteht,
    die Gaskammer (G) an der Innendurchmesserseite der Innendurchmesser-Seitenblase (72) angeordnet ist, und
    die Flüssigkeitskammer (R) auf der Außendurchmesserseite der Außendurchmesser-Seitenblase (71) angeordnet ist.
EP17752981.5A 2016-02-15 2017-02-02 Akkumulator Active EP3418583B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016026285 2016-02-15
PCT/JP2017/003819 WO2017141718A1 (ja) 2016-02-15 2017-02-02 アキュムレータ

Publications (3)

Publication Number Publication Date
EP3418583A1 EP3418583A1 (de) 2018-12-26
EP3418583A4 EP3418583A4 (de) 2019-08-28
EP3418583B1 true EP3418583B1 (de) 2021-08-04

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EP17752981.5A Active EP3418583B1 (de) 2016-02-15 2017-02-02 Akkumulator

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EP (1) EP3418583B1 (de)
JP (1) JP6860546B2 (de)
WO (1) WO2017141718A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2583541B (en) * 2019-05-03 2023-05-10 Polar Tech Management Group Limited Accumulator arrangement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5323923Y2 (de) * 1972-03-18 1978-06-20
JPH0629521Y2 (ja) 1989-03-31 1994-08-10 エヌオーケー株式会社 アキュムレータ
US5117873A (en) * 1990-10-22 1992-06-02 Honda Giken Kogyo Kabushiki Kaisha Bladder edge seal and holder for hydraulic fluid pressure accumulator
JPH0484803U (de) * 1990-11-29 1992-07-23
JPH04117901U (ja) * 1991-04-05 1992-10-22 エヌオーケー株式会社 アキユムレータ

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Title
None *

Also Published As

Publication number Publication date
JPWO2017141718A1 (ja) 2018-12-06
JP6860546B2 (ja) 2021-04-14
EP3418583A1 (de) 2018-12-26
WO2017141718A1 (ja) 2017-08-24
EP3418583A4 (de) 2019-08-28

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