EP1250533A1 - Accumulateur de pression hydropneumatique - Google Patents

Accumulateur de pression hydropneumatique

Info

Publication number
EP1250533A1
EP1250533A1 EP01902324A EP01902324A EP1250533A1 EP 1250533 A1 EP1250533 A1 EP 1250533A1 EP 01902324 A EP01902324 A EP 01902324A EP 01902324 A EP01902324 A EP 01902324A EP 1250533 A1 EP1250533 A1 EP 1250533A1
Authority
EP
European Patent Office
Prior art keywords
trough
valve
bellows
hydraulic fluid
space
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
EP01902324A
Other languages
German (de)
English (en)
Other versions
EP1250533B1 (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 EP1250533A1 publication Critical patent/EP1250533A1/fr
Application granted granted Critical
Publication of EP1250533B1 publication Critical patent/EP1250533B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F15B1/22—Liquid port constructions
    • 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
    • F15B1/103—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means the separating means being bellows
    • 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
    • F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows
    • 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
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid 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
    • F15B2201/415—Gas ports

Definitions

  • the invention relates to a hydropneumatic pressure accumulator with a bellows separating a gas space from an oil space within the storage housing, in particular a metal bellows, which is fastened at one end to the storage housing in such a way that the oil space adjoins the inside of the bellows, which its free other end is closed by a corresponding volume change of gas space and oil space closing body, and with a flow of hydraulic fluid from and into the oil space releasing or blocking valve, which upon movement of the closing body, which exceeds a predetermined maximum magnification of the Corresponds to the volume of the gas space through which the closing body can be moved into its blocking position.
  • the maximum value of the volume of the gas space essentially corresponds to the stroke volume, which is defined by the movement of the end plate when the metal bellows is pulled together and pulled out, the stroke length which the end plate can cover within the accumulator housing must be sufficient - Chosen long enough if a sufficient volume of the gas space is to be made available for the operation of the storage.
  • the invention has for its object to provide a pressure accumulator of the type under consideration, which in contrast is characterized by improved operating properties.
  • this object is achieved according to the invention in that the closing body is designed in the form of a trough, that the trough is connected with its edge located at the open end to the associated free end of the bellows, that the trough is connected to its side wall extends along the inside of the bellows and that the bottom of the trough is designed as a movable valve member of the valve controlling the flow of hydraulic fluid.
  • the design according to the invention in which the bellows surrounds the outside of a trough open on the gas side, is advantageous in several respects. Since the entire interior of the trough is available as part of the gas space, an optimal ratio between the total size of the storage housing and the volume of the gas space is achieved. While in the known pressure accumulator mentioned above, a sufficient volume of the gas space can only be achieved by using the
  • Metal bellows allows a sufficient stroke in the storage housing, which leads to the mentioned overload problems of the bellows, the stroke of the closing body corresponding to the extension of the bellows can be made practically arbitrarily small in the invention.
  • the storage housing can be shaped in such a way that it forms a mechanical stop after a short stroke movement of the trough, because the entire interior of the trough is available as a gas space volume.
  • the bellows is not only protected against excessive pulling out, but because it surrounds the outside of the trough, the bellows is also mechanically on the outside in the event of excess pressure in the gas space of the trough supported over the entire length.
  • This in turn enables the gas pre-filling pressure to be built up before the pressure accumulator is put into operation, ie before the hydraulic system is connected on the oil side. If the latter is the case and the operating pressure is built up in the oil space, the valve controlling the outflow of hydraulic fluid from the oil space maintains pressure equilibrium at the bellows.
  • the trough is preferably circular-cylindrical in shape and the depth of the trough is dimensioned such that its base, which serves as a valve member, interacts as a movable circular valve plate with a valve seat which is formed on the inner wall of the storage housing.
  • This not only results in a particularly simple construction of the valve, but, since the entire surface of the trough bottom is available as a valve plate, a particularly large-area seal can be achieved when the valve is locked.
  • an O-ring can be provided, for example, in the radially outer edge region of the round trough bottom to form an annular sealing surface.
  • a valve tappet fastened to the trough bottom is provided, which is connected to a second movable valve member which, with a movement of the trough exceeding a predetermined minimum value of the volume of the gas space, with a second valve seat blocking the flow of hydraulic fluid into the oil space interacts.
  • the valve lifter also has a guiding function during the lifting movement of the bellows, so that a perfect fit of the trough bottom serving as a valve member on the valve seat and thus a proper locking of the valve are ensured.
  • the invention is explained in detail below with reference to an exemplary embodiment shown in the drawing, in which a metal bellows is used.
  • the single figure shows a longitudinal section of the embodiment of the pressure accumulator.
  • the illustrated embodiment of the pressure accumulator is intended in particular for use in electrohydraulic brake systems and has a accumulator housing designated as a whole as 1.
  • This has an essentially circular-cylindrical main part 3, which is closed on the one hand by a welded-on base cover 5 and on the other hand by a welded-on, flat-curved end cap 7.
  • a central hydraulic connection 9 with passages 11 for the inflow and outflow of a hydraulic fluid to the oil space 13 within the storage housing 1 is provided in the floor cover 5.
  • a centrally located gas filling opening is provided on the end cap 7, which is closed by a stopper 15 and enables a desired gas pre-filling pressure to be produced by filling with a compressible gas in the adjoining gas space 17 of the storage housing 1, for example by filling it with Nitrogen.
  • the outer diameter of the metal bellows 19 is slightly smaller than the inner diameter of the cylindrical main part 3 of the storage housing 1.
  • the metal bellows 19 is sealed by a closing body in the form of a trough 21. In the exemplary embodiment shown, this is circular-cylindrical in shape and has an outer diameter which is somewhat smaller than the inner diameter of the metal bellows 19.
  • the trough 21 is fastened at its open end 23 to the associated free end of the metal bellows 19 with a flange-like edge 25 which is folded outwards , so that the side wall 27 of the trough 21 extends along the inside of the metal bellows 19 surrounding the trough and the interior of the metal bellows 19 merely with the narrow annular space 29 between the outside of the side wall
  • the gas space 17, on the other hand, has a much larger volume because not only the annular space within the storage housing 1 as the gas space
  • the hydraulic connection 9 is assigned a double-acting oil valve 31, which has two valve units which block or release the flow of hydraulic fluid through the passages 11 in opposite flow directions, which are controllable by movements of the metal bellows 19 and thus of the trough 21 if the metal bellows 19 contracts or expands due to pressure differences in the oil space 1 3 and the gas space 17 and the trough 21 executes a corresponding movement along the central longitudinal axis 33 of the storage housing 1.
  • the depth of the trough 21 is dimensioned such that when the metal bellows 19 is unloaded, for example when both the oil chamber 3 and the gas chamber 17 are depressurized, the trough bottom 35 extends into the vicinity of the inner wall 37 of the bottom cover 5.
  • the trough bottom 35 is designed as a circular valve plate, which, with the adjacent inner wall 37, which is designed as an associated valve seat, forms one of the valve units mentioned.
  • an O-ring 39 is provided on the radially outer edge of the trough bottom 35 and an O-ring 41 on the inner wall 37 of the bottom cover 5, the O-rings 39 and 41 being received in corresponding ring grooves. Due to the relatively large radial distance of the sealing surfaces from the central longitudinal axis 33 due to the diameter of the trough 21, a large-area sealing and thus a very secure locking of the valve is ensured.
  • the second valve unit has a valve body 43 which can be moved together with the trough 21 via a valve tappet 45 fastened to the trough bottom 35.
  • the valve lifter 45 extends out of the storage housing 1 through a central bore 47 in the base cover 5.
  • the valve body 43 interacts with a valve seat 49 formed in the hydraulic connection 9 and has an O-ring 50 which can be placed on the valve seat.
  • the trough 21 moves when the metal bellows 19 contracts due to an overpressure state in the gas chamber 17 relative to the oil chamber 13 with its trough bottom 35 serving as a valve plate on the inner wall 37 of the bottom cover 5, so that the O-rings 39 and 41 come to rest on corresponding surfaces of the valve seat or valve plate and an outflow of hydraulic fluid through the passages 11 from the oil space 13 is blocked.
  • the pressure accumulator according to the invention by the presence of the double-acting valve 31, that is to say in that both the outflow of hydraulic fluid and the inflow of hydraulic fluid are controlled, operates in a self-controlling manner in operation with regard to maintaining the pressure equalization on the metal bellows 19, as a result of which maximum operational reliability is guaranteed over long periods of operation and metal bellows of light construction can be used advantageously accordingly. It also results from the fact that a trough 21 extending into the interior of the metal bellows 19 is provided as the end of the open end of the metal bellows 19, not only the advantage of the simplified one

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)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Saccharide Compounds (AREA)
  • Vehicle Body Suspensions (AREA)
EP01902324A 2000-01-29 2001-01-17 Accumulateur de pression hydropneumatique Expired - Lifetime EP1250533B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10003648 2000-01-29
DE10003648A DE10003648A1 (de) 2000-01-29 2000-01-29 Hydropneumatischer Druckspeicher
PCT/EP2001/000442 WO2001055602A1 (fr) 2000-01-29 2001-01-17 Accumulateur de pression hydropneumatique

Publications (2)

Publication Number Publication Date
EP1250533A1 true EP1250533A1 (fr) 2002-10-23
EP1250533B1 EP1250533B1 (fr) 2005-05-18

Family

ID=7628993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01902324A Expired - Lifetime EP1250533B1 (fr) 2000-01-29 2001-01-17 Accumulateur de pression hydropneumatique

Country Status (7)

Country Link
US (1) US6622755B2 (fr)
EP (1) EP1250533B1 (fr)
JP (1) JP3971188B2 (fr)
AT (1) ATE295941T1 (fr)
DE (2) DE10003648A1 (fr)
ES (1) ES2240397T3 (fr)
WO (1) WO2001055602A1 (fr)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7614568B2 (en) * 2000-08-24 2009-11-10 Microlin, Llc Device employing gas generating cell for facilitating controlled release of fluid into ambient environment
JP2002276604A (ja) * 2000-08-09 2002-09-25 Nok Corp アキュムレータ
DE10101854A1 (de) * 2000-08-30 2002-06-13 Continental Teves Ag & Co Ohg Druckmittelspeicher
DE10142038A1 (de) * 2001-02-23 2002-09-05 Continental Teves Ag & Co Ohg Druckmittelspeicher
US7276529B2 (en) * 2002-03-20 2007-10-02 Celgene Corporation Methods of the treatment or prevention of exercise-induced asthma using (+)-2-[1-(3-ethoxy-4-methoxyphenyl)-2-methylsulfonylethyl]-4-acetylaminoisoindoline-1,3-dione
DE10253012A1 (de) * 2002-04-26 2003-11-06 Continental Teves Ag & Co Ohg Druckmittelspeicher
JP3906915B2 (ja) * 2002-07-15 2007-04-18 株式会社アドヴィックス 液圧回路
JP2004051005A (ja) * 2002-07-22 2004-02-19 Advics:Kk ブレーキアクチュエータ用圧入部品
DE10304288A1 (de) * 2002-10-24 2004-05-13 Continental Teves Ag & Co. Ohg Druckmittelspeicher
DE10320373B4 (de) * 2003-05-07 2009-01-15 Lucas Automotive Gmbh Gasdruckspeicher für eine Fahrzeugbremsanlage
DE10352406B4 (de) * 2003-11-10 2013-09-26 Volkswagen Ag Druckspeicher und Bremsanlage mit einem solchen
DE102004004341A1 (de) 2004-01-29 2005-08-18 Hydac Technology Gmbh Druckspeicher, insbesondere Pulsationsdämpfer
JP4272604B2 (ja) * 2004-08-23 2009-06-03 日本発條株式会社 圧力容器及び蓄圧・緩衝装置
DE102006025552B4 (de) * 2006-06-01 2008-07-31 Hydac Technology Gmbh Hydropneumatischer Druckspeicher
DE102007003723A1 (de) 2007-01-25 2008-07-31 Elringklinger Ag Strukturbauteil
US8113390B2 (en) 2007-04-18 2012-02-14 Microlin, Llc Gas generation dispenser apparatus and method for on-demand fluid delivery
DE102008016354A1 (de) * 2007-08-28 2009-05-28 Continental Teves Ag & Co. Ohg Druckspeicher
JP5474333B2 (ja) * 2008-11-05 2014-04-16 イーグル工業株式会社 アキュムレータ
WO2011079852A1 (fr) * 2009-12-30 2011-07-07 Hydac Technology Gmbh Accumulateur hydraulique, en particulier accumulateur à soufflet
EP2714102B1 (fr) 2011-06-03 2018-10-10 Microlin, LLC Dispositif pour délivrance de liquides volatils à un environnement gazeux
WO2015015882A1 (fr) * 2013-07-29 2015-02-05 イーグル工業株式会社 Accumulateur
EP3279481B1 (fr) * 2015-04-02 2020-06-10 Eagle Industry Co., Ltd. Accumulateur
US10323746B2 (en) * 2015-05-29 2019-06-18 Eagle Industry Co., Ltd. Metal bellows type accumulator
DE102018007279A1 (de) * 2018-09-14 2020-03-19 Hydac Technology Gmbh Balgspeicher
US11761507B2 (en) * 2021-02-10 2023-09-19 DRiV Automotive Inc. Weight optimized bellow accumulator

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Also Published As

Publication number Publication date
JP3971188B2 (ja) 2007-09-05
EP1250533B1 (fr) 2005-05-18
US20030000589A1 (en) 2003-01-02
DE10003648A1 (de) 2001-08-09
ATE295941T1 (de) 2005-06-15
ES2240397T3 (es) 2005-10-16
US6622755B2 (en) 2003-09-23
WO2001055602A1 (fr) 2001-08-02
DE50106255D1 (de) 2005-06-23
JP2003521643A (ja) 2003-07-15

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