US3424201A - Bladder type accumulator with core tube - Google Patents

Bladder type accumulator with core tube Download PDF

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Publication number
US3424201A
US3424201A US557130A US3424201DA US3424201A US 3424201 A US3424201 A US 3424201A US 557130 A US557130 A US 557130A US 3424201D A US3424201D A US 3424201DA US 3424201 A US3424201 A US 3424201A
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United States
Prior art keywords
gas bag
valve
core tube
liquid
gas
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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.)
Expired - Lifetime
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US557130A
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English (en)
Inventor
Kazuo Sugimura
Nobuyuki Sugimura
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Individual
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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
    • F15B1/16—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means in the form of a tube
    • 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
    • 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
    • F15B2201/3152—Accumulator separating means having flexible separating means the flexible separating means being bladders
    • 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
    • F15B2201/415—Gas ports
    • F15B2201/4155—Gas ports having valve 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
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/43—Anti-extrusion means
    • F15B2201/435—Anti-extrusion means being fixed to the separating means

Definitions

  • This invention relates to the improvement of accumulators of pressure liquid type, consisting of a cylindrical and rigid pressure liquid tank, and of an elastic and flexible cylindrical gas bag, generally called a bladder, filled with gas under a certain standard pressure, and equipped 'within the liquid tank.
  • the important features of the bladder are that it inflates and deflates regularly in a certain designed manner, and that it does not collapse into irregular shapes both crosswise and longitudinally.
  • the bladder wrinkles and crumples, which causes sharp folds in its flexible wall, which is spoiled, torn and ruptured.
  • Useful life of the bladder is thus much shortened.
  • the random collapsing of bladders not only shortens their useful lives, but also reduces their shock absorbing capacity.
  • T o avoid the defect of random collapsing, some of the improved bladders have longitudinal reinforcements in their cylindrical Wall, so that the bladders deflates regularly to pre-designed forms in the cross section.
  • the liquid port is generally closed by the bladder by pushing the poppet valve down against its valve seat, equipped at the gate of liquid port.
  • the flexible wall of bladder which thus directly contacts With and pushes the valve, is easily spoiled by the sharp edge and corner of the valve, and by the projection of valve arrangement.
  • the flexible wall of bladder is often caught and pinched by and between the valve and its seat. Useful life of the bladder is thus again much shortened. This is also another defect of the conventional.
  • the present invention eliminates all these defects of conventional accumulators, and offers a sensible shock absorbing apparatus characterized by constant, steady, and ample accumulating capacity over its long entire lifetime.
  • FIG. 1 is the longitudinal section and FIG. 2 is the cross section of the accumulator, while FIG. 3' represents the 3,424,201 Patented Jan. 28, 1969 cross section of the bladder how its cross section changes in the source of deflation.
  • the liquid tank 1 is of a cylindrical shape and is tapered conically at the ends, to make openings 2 and 3 for gas and liquid respectively.
  • the gas bag 5 is also of a cylindrical shape and tapered conically towards the ends, one of which is opened and flanged as shown by 6, and is tightly fastened to the liquid tank at its opening 2 by a gas valve housing 10 and a nut 11.
  • a gas valve :12 is equipped on the gas valve housing 10 to charge the gas bag 5 with gas to a certain standard pressure.
  • the gas valve may be replaced by a pipe 13 to connect the gas bag to a certain pressure gas source.
  • the accumulator is called a transfer barrier to transfer fluid.
  • a poppet valve 9 is tightly and integrally equipped to compose the bottom of the gas bag, so that the valve faces its valve seat 4, which is equipped at the other opening end of the liquid tank to form a liquid port 3.
  • a core tube 7 is installed'within the gas bag 5 by being rigidly fixed to the gas valve housing 10 at the upper end.
  • a valve guide 14 is rigidly equipped to serve as a seat for the fully opened poppet valve 9 and to slidably support and guide the valve by its valve spindle 15.
  • a coil spring 17 is provided between the valve guide 14 and a spring seat 16, which is fixed at the end of the valve spindle 15 to push the poppet valve upwards to open.
  • a suitable number of longitudinal fins 8 of elastic and flexible material are radially fixed to the core tube 7 along its outer surface, to give resistance against the wall of deflating gas bag 5.
  • the core tube fitted with flexible longitudinal fins may easily be inserted into the bladder and the liquid tank through the flanged end and the opening 2 respectively, with fins bent as shown by chain line 8' in FIG. 2.
  • a suitable number of small communicating holes 18 are perforated so that gas can flow freely to follow the change of the volume of the gas bag.
  • the gas bag inflates and deflates smoothly and regularly in a certain designed manner, and that when it deflates, it does not collapse into irregular shapes both in crosswise and longitudinal directions, as to be described later.
  • the bag keeps its natural cylindrical shape, but in the course that the bag is compressed and deflated, as soon as the tension within the wall becomes zero (when the tension becomes zero, it will hereinafter be defined that the wall is at its inflection point), the cylindrical wall of the bag of uniform thickness begins to deform at random to an iregular shape in cross section, which is the defective feature of conventional accumulators, as already mentioned.
  • the gas bag is so made that the cylindrical wall is at its inflection point when the inner surface touches the tips of the longitudinal radial fins 8, as shown in the FIG. 2b. Therefore, when the gas bag has come to this condition in the course of deflation, the
  • gas bag begins to collapse at random. But due to the resistance oflFered by the longitudinal radial fins 8 against deflation, the gas bag 5 cannot deflate at random, but deflates as shown in FIG. 3c. When the gas bag further deflates, it will take the form as shown in the FIG. 3d, and further it will deflate to the extreme, so that the cylindrical wall touches the whole surface of fins 8 as well as the surface of core tube 7 as shown in the FIG. 3e, and this extremely deflated form is the pre-designed regular form of extreme deflation of the gas bag 5.
  • a flap 19 with a vent may be provided on the outer surface of core tube 7 over each communicating hole 18, so that the wall of extremely deflated gas bag may not protrude into the hole 18.
  • the gas bag 5 never fails to deflate regularly to the pro-designed form in its cross section as shown in the FIG. 3's, and thus supported by the core tube 7, the deflated gas bag is always kept straight without being bent longitudinally.
  • the deflated gas bag will inflate radially in the reverse way as shown in the FIG. 3s, until its cylindrical wall touches the cylindrical wall of liquid tank, and then the gas bag will inflate longitudinally towards the liquid port 3, until at last the poppet valve 9 which is integrally equipped to the gas bag at its bottom, will, being guided by the valve guide 14 and compressing the valve spring 17, approach is valve seat 4, and at last, will touch the seat to close the liquid port 3.
  • a full course of inflation from extreme deflation of the gas bag or of pressure liquid discharge is thus completed.
  • a bladder type accumulator comprising a cylindrical liquid tank made of rigid material and a cylindrical gas bag made of flexible and elastic material concentrically disposed within said tank, the outer diameter of said gas bag being smaller than that of said liquid tank, said liquid tank being provided with a gas inlet at one end and a valve seat at the other end, said gas bag being secured at one end to the gas inlet end of said liquid tank while the other lower end of said gas bag is free;
  • a core tube of rigid material disposed within said gas bag one end of which is secured to the gas inlet end of said liquid tank and the other lower end of which terminates adjacent the free lower end of said gas bag, said core tube having a plurality of longitudinal disposed fins radially extending therefrom a distance corresponding to the inflection point of the elastic gas bag, said core tube defining a plurality of small communicating holes therethrough, a flap with a vent on said core tube for each of said communicating holes;
  • poppet valve means at the lower end of said gas bag including a valve guide at the lower end of said core tube disposed within said gas bag, a valve spindle guided slidably within said valve guide, a valve member carried by said valve spindle integral with and closing the free end of said gas bag, and spring means along said spindle to bias said valve member away from said valve seat.
  • valve member is generally flat
  • said spring is a coil spring
  • said valve guide is rigidly attached to the bottom of said core tube and forms at its bottom a second valve seat for said generally flat member in which said spring normally biases said flat valve member
  • said spindle is provided at its upper end with a seat for said spring.
  • a device in accordance with claim 2 further comprising a gas valve at said gas inlet.

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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)
  • Reciprocating Pumps (AREA)
US557130A 1965-09-15 1966-06-13 Bladder type accumulator with core tube Expired - Lifetime US3424201A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5653065A JPS5340726B1 (id) 1965-09-15 1965-09-15

Publications (1)

Publication Number Publication Date
US3424201A true US3424201A (en) 1969-01-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US557130A Expired - Lifetime US3424201A (en) 1965-09-15 1966-06-13 Bladder type accumulator with core tube

Country Status (4)

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US (1) US3424201A (id)
JP (1) JPS5340726B1 (id)
DE (1) DE1298795B (id)
GB (1) GB1133496A (id)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483893A (en) * 1966-03-11 1969-12-16 Hydrotrole Ltd Hydropneumatic accumulator
US3822725A (en) * 1973-08-24 1974-07-09 Bosch Gmbh Robert Pulsation damping device for use with pressure fluid operated apparatus
US4392390A (en) * 1981-03-02 1983-07-12 Duff-Norton Company Shielding apparatus for linear actuator
US4838316A (en) * 1987-04-07 1989-06-13 Nobuyuki Sugimura Accumulator provided with an insert
US5044511A (en) * 1989-04-27 1991-09-03 Davey Products Pty. Ltd. Manufacture and method of producing a resilient diaphragm suitable for liquid pressure tanks
AU621220B2 (en) * 1989-04-27 1992-03-05 Davey Products Pty Ltd Pressure tank diaphragm and method of manufacture
WO2014197263A3 (en) * 2013-06-05 2015-04-23 Vickio Louis P Jr Hydraulic accumulator
US10731784B2 (en) * 2017-12-01 2020-08-04 Safran Aircraft Engines Accumulator integrated into a fuel line
CN112032454A (zh) * 2020-09-21 2020-12-04 北京航空航天大学 气液耦合式流体脉动消振器
CN114233695A (zh) * 2021-12-31 2022-03-25 中国第一汽车股份有限公司 一种蓄能器及变速器液压控制系统
US11346374B2 (en) 2020-09-08 2022-05-31 Blacoh Fluid Controls, Inc. Fluid pulsation dampeners
US11549523B2 (en) 2021-04-27 2023-01-10 Blacoh Fluid Controls, Inc. Automatic fluid pump inlet stabilizers and vacuum regulators
USD993359S1 (en) 2018-02-05 2023-07-25 Blacoh Fluid Controls, Inc. Valve

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2702133A1 (de) * 1977-01-20 1978-07-27 Bosch Gmbh Robert Speicher
US4182377A (en) * 1978-12-04 1980-01-08 Greer Hydraulics, Inc. Low cost accumulator device
GB2163488B (en) * 1984-07-11 1988-06-02 Nobuyuki Sugimura Pulsation absorbing means
US4705077A (en) * 1985-07-02 1987-11-10 Nobuyuki Sugimura Pulsation damping means incorporating therein an inner cylinder having laminated resilient valve shoes
DE3615177A1 (de) * 1985-08-06 1987-02-19 Nobuyuki Sugimura Isolierteil in einem einbauspeicher
US4610369A (en) * 1985-10-07 1986-09-09 Mercier Jacques H Pressure vessel
US4872486A (en) * 1987-04-07 1989-10-10 Nobuyuki Sugimura Accumulator having inclined communication holes
FR2669380A1 (fr) * 1990-11-21 1992-05-22 Leduc Rene Hydro Sa Perfectionnement aux accumulateurs du type comportant un corps tubulaire ferme a au moins l'une de ses extremites par un bouchon.
DE10113415A1 (de) * 2001-03-20 2002-10-02 Hydac Technology Gmbh Hydropneumatischer Druckspeicher
CN104896123A (zh) * 2014-03-06 2015-09-09 Jc卡特有限责任公司 提升阀组件
AT522152B1 (de) * 2019-02-19 2020-09-15 Hainzl Ind Gmbh Hydrospeicher zur Anspeisung von Stellgliedern mit einer Betriebsfrequenz von mehr als 100 Hz

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342356A (en) * 1938-09-13 1944-02-22 Mercier Jean Deformable or elastic accumulator
US3115162A (en) * 1959-07-16 1963-12-24 American Metal Prod Accumulator
US3138176A (en) * 1955-03-14 1964-06-23 Mercier Jean Pressure device
US3143144A (en) * 1961-11-27 1964-08-04 Peet William Harold Accumulator
US3182685A (en) * 1959-05-27 1965-05-11 Mercier Jean Closure valve for the outlet port of a pressure vessel
US3319420A (en) * 1965-07-20 1967-05-16 Olaer Patent Co Pressure vessel
US3364949A (en) * 1965-06-14 1968-01-23 Albert J Kramer Accumulators of pressure liquid type

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE895852C (de) * 1951-10-03 1953-11-05 Arnold Von Pohl Dipl Ing Druckkammer-Windkessel
GB826571A (en) * 1955-03-02 1960-01-13 Mercier Jean Pressure vessel
US2841181A (en) * 1956-01-31 1958-07-01 Westinghouse Air Brake Co Pulsation dampener device
FR1408181A (fr) * 1964-01-24 1965-08-13 Olaer Patent Co Organe de guidage pour séparateur souple dans un réservoir de pression

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342356A (en) * 1938-09-13 1944-02-22 Mercier Jean Deformable or elastic accumulator
US3138176A (en) * 1955-03-14 1964-06-23 Mercier Jean Pressure device
US3182685A (en) * 1959-05-27 1965-05-11 Mercier Jean Closure valve for the outlet port of a pressure vessel
US3115162A (en) * 1959-07-16 1963-12-24 American Metal Prod Accumulator
US3143144A (en) * 1961-11-27 1964-08-04 Peet William Harold Accumulator
US3364949A (en) * 1965-06-14 1968-01-23 Albert J Kramer Accumulators of pressure liquid type
US3319420A (en) * 1965-07-20 1967-05-16 Olaer Patent Co Pressure vessel

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483893A (en) * 1966-03-11 1969-12-16 Hydrotrole Ltd Hydropneumatic accumulator
US3822725A (en) * 1973-08-24 1974-07-09 Bosch Gmbh Robert Pulsation damping device for use with pressure fluid operated apparatus
US4392390A (en) * 1981-03-02 1983-07-12 Duff-Norton Company Shielding apparatus for linear actuator
US4838316A (en) * 1987-04-07 1989-06-13 Nobuyuki Sugimura Accumulator provided with an insert
US5044511A (en) * 1989-04-27 1991-09-03 Davey Products Pty. Ltd. Manufacture and method of producing a resilient diaphragm suitable for liquid pressure tanks
AU621220B2 (en) * 1989-04-27 1992-03-05 Davey Products Pty Ltd Pressure tank diaphragm and method of manufacture
WO2014197263A3 (en) * 2013-06-05 2015-04-23 Vickio Louis P Jr Hydraulic accumulator
US10731784B2 (en) * 2017-12-01 2020-08-04 Safran Aircraft Engines Accumulator integrated into a fuel line
USD993359S1 (en) 2018-02-05 2023-07-25 Blacoh Fluid Controls, Inc. Valve
US11346374B2 (en) 2020-09-08 2022-05-31 Blacoh Fluid Controls, Inc. Fluid pulsation dampeners
CN112032454A (zh) * 2020-09-21 2020-12-04 北京航空航天大学 气液耦合式流体脉动消振器
US11549523B2 (en) 2021-04-27 2023-01-10 Blacoh Fluid Controls, Inc. Automatic fluid pump inlet stabilizers and vacuum regulators
US11828303B2 (en) 2021-04-27 2023-11-28 Blacoh Fluid Controls, Inc. Automatic fluid pump inlet stabilizers and vacuum regulators
CN114233695A (zh) * 2021-12-31 2022-03-25 中国第一汽车股份有限公司 一种蓄能器及变速器液压控制系统

Also Published As

Publication number Publication date
JPS5340726B1 (id) 1978-10-28
GB1133496A (en) 1968-11-13
DE1298795B (de) 1969-07-03

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