US3580290A - Accumulator - Google Patents

Accumulator Download PDF

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Publication number
US3580290A
US3580290A US828120A US3580290DA US3580290A US 3580290 A US3580290 A US 3580290A US 828120 A US828120 A US 828120A US 3580290D A US3580290D A US 3580290DA US 3580290 A US3580290 A US 3580290A
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United States
Prior art keywords
bladder
valve
container
rod
valve element
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.)
Expired - Lifetime
Application number
US828120A
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English (en)
Inventor
Kazuo Sugimura
Nobuyuki Sugimura
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Individual
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Individual
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Publication date
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Publication of US3580290A publication Critical patent/US3580290A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/18—Anti-extrusion means
    • F15B1/20—Anti-extrusion means fixed to the separating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/04—Devices damping pulsations or vibrations in fluids
    • F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
    • F16L55/05—Buffers therefor
    • F16L55/052—Pneumatic reservoirs
    • 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

Definitions

  • An accumulator comprises a rigid container having a valve seat at its fluid inlet and a bladder therein ca [54] ACCUMULATOR ing a valve element that engages the valve seat when the bladder is fully expanded. There is a dashpot connection 3 Claims, 4 Drawing Figs. [52] between the valve element and a fixed spider in the inlet, to guide the valve element and so retard its motion when it is near the valve seat as to encourage radial rather than axial expansion and contraction of the bladder, thus preventing rubbing of the bladder on the container.
  • Patented May 25, 1971 yzmuri k: 5 1mm 27 flazva in 017 ACCUMULATOR' This invention relates to an improved accumulator comprising a cylindrical liquid container and a gas bladder of approximately the same shape housed in said container.
  • the liquid container has at its lower end a port which communicates with an oil circuit comprising various kinds of pres sure liquid apparatus. When liquid is let in or out of the container through this port said gas bladder expands or contracts.
  • the object of the present invention is to provide an improved accumulator wherein there is a valve element on the gas bladder cooperable with a valve seat at the port to close the port when the bladder fully expands and liquid in the container is completely expelled from said port without any liquid left in the container.
  • Another object of the present invention is to provide such an accumulator wherein, when the gas bladder expands suddenly, the valve provided at the lower end of the gas bladder will not abruptly engage the valve seat provided around the port of the container so as not to injure these parts.
  • Still another object of the present invention is to slow the longitudinal movement of the bladder as the valve element on the bladder comes closer to the valve seat on the container.
  • a further object of the present invention is to provide means that overcomes the tendency of the bladder to float upwardly by buoyancy when liquid is present in the container, so that the bladder is not deformed into an irregular shape.
  • the accumulator of the present invention has the following features.
  • the accumulator comprises a cylindrical liquid container having a port at one end thereof provided with a valve seat and a gas bladder enclosed in said container having a valve at its lower end.
  • a liquid damper comprising a cylinder in which a piston is slidable with a loose fit, which piston bridges the port portion of said liquid container and the valve at the lower end of gas bladder.
  • FIG. 1 is a longitudinal section 'view of an accumulator of the present invention.
  • FIG. 2 is a longitudinal section view of an accumulator of a second embodiment of the present invention.
  • FIG. 3 is a fragmentary longitudinal section view of an accumulator of a third embodiment.
  • FIG. 4 is a fragmentary section view of an accumulator of a fourth embodiment.
  • an accumulator of the present invention comprising a liquid container 1 made of rigid material such as steel having substantial pressure resistance, in which is housed an elastic gas bladder 2 made of rubber or any other elastic material. Pressure liquid is introduced into the space between said container 1 and gas bladder 2.
  • a gas valve 3 is provided on the top end of said gas bladder, projecting from the container 1, through which gas is forced into the bladder 2.
  • a cap 4 is provided on this part to protect it against dust.
  • the container 1 has at its bottom a liquid port 5 through which liquid is let into and out of the container 1.
  • Avalve seat 6 is formed at the inner periphery of said port 5.
  • a rod 7 extends through the center of said valve seat 6 and the lower end of the rod 7 is secured to a boss 6" which is supported by a plurality of arms 6' extending to the valve seat 6.
  • the bladder 2 has at its lower end a valve 8 which serves to close or open said port 5 in moving into and out of engagement with said valve seat 6.
  • Said valve 8 has a cylinder portion 9 projecting inwardly of the bladder.
  • a piston 10 is slidably engaged with a loose tit so that a clearance 11 is provided between the inner wall of the cylinder portion 9 and the piston 10.
  • the piston 10 is rigidly attached to the top end of said rod 7 which extends with some clearance through an opening 8 provided in the center of said valve 8, the clearance between said rod 7 and valve 8 being designated by 12.
  • the upper cylinder chamber 9' above the piston 10 and the lower cylinder chamber 9" below the piston 10 are filled with liquid of the container through said clearances 11 and 12 respectively.
  • the gas bladder 2 will expand substantially more in a radial direction than in a longitudinal direction before the valve 8 contacts the valve seat 6, to insure that no liquid will be left sealed within the cylinder 1. Nor will there be a damage to any part caused by a hard hit of the valve 8 against the valve seat 6.
  • the bladder is kept in the position shown in the drawings and will never be susceptible to local damage by its irregular deformation. This is also true when the container 1 of the accumulator is set invertedly from the position shown in FIG. 1 or is set horizontally to suit convenience of installation.
  • FIG. 2 there is shown another type of container 21, the top end of which is wide open, and a bladder 22 is enclosed therein with its upper flanged portion 23 being inserted between the upper rim of the container 21 and a cover 24.
  • a gas valve 25 extends through the cover by which gas is forced into the bladder 22 and is provided with a cap 26 against dust.
  • the container 21 has a port 36 through which liquid is introduced and which has a valve seat 30 on a part of its inner periphery. Inside this valve seat 30 there is provided a cylinder 27 which extends downwardly and is supported by arms 30' extending to the valve seat 30.
  • a piston 28 is mounted with a loose fit so that there is provided clearance 29 between the wall of the cylinder 27 and the piston 28.
  • a hole 31 through which extends, with a clearance 34, a rod 33 hereinafter described, and there is a small opening 35 at the lower end of the cylinder 27.
  • a valve 32 is provided at the lower end of the bladder 22 which moves toward and from engagement with said valve seat 30.
  • a rod 33 projecting downwardly from the center of said valve 32 loosely fits in said guide hole 31, and the other end of the rod 33 is securely attached to said piston 28.
  • the accumulator shown in FIG. 3 is a somewhat different i from that shown in FIG. 1 in that the rod 7 has at its lower end a larger diameter portion 7'.
  • the gas bladder 2 expands from the position shown in solid lines to the position shown in chain lines the liquid in the upper cylinder chamber 9' flows through the clearance ll to the lower cylinder chamber 9" and further therefrom flows through the clearance 12 into the liquid container 1.
  • the clearance 12 is reduced so that the'flow resistance of the liquid is increased, thus slowing the expansion speed in a longitudinal direction of the bladder 2.
  • the accumulator shown in FIG. 4 is similar to that shown in FIG. 2 except that the cylinder 27 has a smaller diameter portion 27 so that there is a variation in the clearance 29 between the piston 28 and the wall of the cylinder 27.
  • clearance 29 is relatively large until the piston moves from the position shown in solid lines to the position shown in chain lines. However after it has moved beyond the position shown with the chain lines, clearance 29 becomes relatively smaller so that the expansion speed in a longitudinal direction of the bladder is retarded.
  • an accumulator comprising a rigid container having a port at one end thereof through which liquid can flow in and out, a valve seat element on the container surrounding said port, a resilient gas filled bladder in the container, one end of which is secured to the container remotely from the port and which contracts and expands as liquid moves into and out of the container, and a valve element carried by said bladder at its other end for movement toward and from engagement with the valve seat element in consequence of expansion and contraction of the bladder, means for guiding the valve element in its motion toward and from the valve seat element and for retarding motion of the valve element when it is near the valve seat element so as to constrain-the bladder to expanding and contracting motion mainly in directions transverse to the axis of the port and thus minimizerubbing of the bladder against the interior of the container, said means comprising:
  • said rod having an enlarged diameter portion near its first named end which enters said hole as the valve element nears the seat element to reduce the clearance between the rod and said wall and thus afford additional retardation of valve element motion when the valve element is near the seat element.
  • the bore of said cylinder having a reduced diameter portion at its end nearer said wall, cooperable with the piston when the valve element is near the seat element to afford additional retardation of valve element motion when the valve element is near the seat element.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
US828120A 1968-06-01 1969-05-27 Accumulator Expired - Lifetime US3580290A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP43037716A JPS495847B1 (it) 1968-06-01 1968-06-01

Publications (1)

Publication Number Publication Date
US3580290A true US3580290A (en) 1971-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
US828120A Expired - Lifetime US3580290A (en) 1968-06-01 1969-05-27 Accumulator

Country Status (5)

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US (1) US3580290A (it)
JP (1) JPS495847B1 (it)
DE (1) DE1927711B2 (it)
GB (1) GB1264214A (it)
SU (1) SU361583A3 (it)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045861A (en) * 1975-02-24 1977-09-06 Greer Hydraulics, Inc. Method of forming a pressure accumulator
US4067360A (en) * 1975-08-16 1978-01-10 Robert Bosch Gmbh Valve for controlling an opening for the passage of fluid into and out of a pressure accumulator
US4166478A (en) * 1977-12-21 1979-09-04 Kazuo Sugimura Accumulator having a bladder to be filled with liquid
US4181156A (en) * 1978-12-04 1980-01-01 Greer Hydraulics, Inc. Pressure accumulator with anti-extrusion gas charging valve assembly
US4214611A (en) * 1979-03-19 1980-07-29 Structural Fibers, Inc. Tie-down for accumulator bags
US4448217A (en) * 1982-09-27 1984-05-15 The Normand Trust Accumulator having bladder in expansion limiting contact with casing
US4676323A (en) * 1984-05-24 1987-06-30 Atlas Copco Aktiebolag Hydraulically operated percussive machine and an accumulator therefor
US20040084958A1 (en) * 2002-07-22 2004-05-06 Advics Co., Ltd. Element for brake actuator
FR2893096A1 (fr) * 2005-11-04 2007-05-11 Hydro Leduc Soc Par Actions Si Accumulateur oleopneumatique.
US20130000735A1 (en) * 2010-03-19 2013-01-03 Blaze Martin J Pressure relief apparatus for hydropneumatic vessel
CN104595258A (zh) * 2013-10-30 2015-05-06 北京精密机电控制设备研究所 电爆式充气蓄压器
CN110748535A (zh) * 2018-07-05 2020-02-04 曼纽尔·卡尔·希梅诺 脉动阻尼器
US11499543B2 (en) 2018-05-25 2022-11-15 Graco Minnesota Inc. Pneumatic surge suppressor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240443B2 (it) * 1973-05-21 1977-10-12
US5388720A (en) * 1994-04-15 1995-02-14 Essef Corporation Flanged diffuser and air cell retainer for pressure vessel
AT402340B (de) * 1994-10-31 1997-04-25 Vaillant Gmbh Druckausdehnungsgefäss

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US399905A (en) * 1889-03-19 Water-closet valve
US2342356A (en) * 1938-09-13 1944-02-22 Mercier Jean Deformable or elastic accumulator
US2947326A (en) * 1955-03-14 1960-08-02 Mercier Jean Pressure device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US399905A (en) * 1889-03-19 Water-closet valve
US2342356A (en) * 1938-09-13 1944-02-22 Mercier Jean Deformable or elastic accumulator
US2947326A (en) * 1955-03-14 1960-08-02 Mercier Jean Pressure device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045861A (en) * 1975-02-24 1977-09-06 Greer Hydraulics, Inc. Method of forming a pressure accumulator
US4067360A (en) * 1975-08-16 1978-01-10 Robert Bosch Gmbh Valve for controlling an opening for the passage of fluid into and out of a pressure accumulator
US4166478A (en) * 1977-12-21 1979-09-04 Kazuo Sugimura Accumulator having a bladder to be filled with liquid
US4181156A (en) * 1978-12-04 1980-01-01 Greer Hydraulics, Inc. Pressure accumulator with anti-extrusion gas charging valve assembly
US4214611A (en) * 1979-03-19 1980-07-29 Structural Fibers, Inc. Tie-down for accumulator bags
US4448217A (en) * 1982-09-27 1984-05-15 The Normand Trust Accumulator having bladder in expansion limiting contact with casing
US4676323A (en) * 1984-05-24 1987-06-30 Atlas Copco Aktiebolag Hydraulically operated percussive machine and an accumulator therefor
US20040084958A1 (en) * 2002-07-22 2004-05-06 Advics Co., Ltd. Element for brake actuator
FR2893096A1 (fr) * 2005-11-04 2007-05-11 Hydro Leduc Soc Par Actions Si Accumulateur oleopneumatique.
US20130000735A1 (en) * 2010-03-19 2013-01-03 Blaze Martin J Pressure relief apparatus for hydropneumatic vessel
CN104595258A (zh) * 2013-10-30 2015-05-06 北京精密机电控制设备研究所 电爆式充气蓄压器
CN104595258B (zh) * 2013-10-30 2017-08-18 北京精密机电控制设备研究所 电爆式充气蓄压器
US11499543B2 (en) 2018-05-25 2022-11-15 Graco Minnesota Inc. Pneumatic surge suppressor
CN110748535A (zh) * 2018-07-05 2020-02-04 曼纽尔·卡尔·希梅诺 脉动阻尼器

Also Published As

Publication number Publication date
DE1927711A1 (de) 1969-12-11
GB1264214A (it) 1972-02-16
JPS495847B1 (it) 1974-02-09
DE1927711B2 (de) 1971-11-25
SU361583A3 (it) 1972-12-07

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