EP1250533B1 - Accumulateur de pression hydropneumatique - Google Patents

Accumulateur de pression hydropneumatique Download PDF

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Publication number
EP1250533B1
EP1250533B1 EP01902324A EP01902324A EP1250533B1 EP 1250533 B1 EP1250533 B1 EP 1250533B1 EP 01902324 A EP01902324 A EP 01902324A EP 01902324 A EP01902324 A EP 01902324A EP 1250533 B1 EP1250533 B1 EP 1250533B1
Authority
EP
European Patent Office
Prior art keywords
valve
trough
bellows
pressure accumulator
oil chamber
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
EP01902324A
Other languages
German (de)
English (en)
Other versions
EP1250533A1 (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

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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
    • F15B1/22—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 within the storage housing a gas space of an oil chamber separating bellows, in particular a metal bellows, at its one End is attached to the storage housing so that the oil chamber to the inside adjacent to the bellows, which at its free other end by a movable according to volume changes of gas space and oil space Closure body is closed, and with a stream of Hydraulikfluidum from and in the oil room releasing or blocking Valve, the case of a movement of the closing body, the one given maximum value exceeding increase in the volume of Gas space corresponds, through which the closing body in its blocking Position can be transferred, the closure body in the form of a trough is formed, the trough with its located at the open end Edge is connected to the associated free end of the bellows, wherein the trough extends with its side wall along the inside of the bellows and wherein the bottom of the trough as a movable valve member of the Flows of Hydraulikfluid
  • GB-A-1 047 983 is a generic hydropneumatic Pressure accumulator known with a within the memory a gas space from an oil space separating bellows, at its one end to the storage enclosure is attached so that the oil space to the inside of the bellows adjoining at its free other end by a corresponding one Volume changes of gas space and . ⁇ lraum movable closure body is closed, and with a stream of Hydraulikfluidum from in the oil space releasing or blocking valve, the at a Movement of the shot body exceeding one of a predetermined value Magnification of the volume of the gas space corresponds, by the closure body in its blocking position can be transferred, wherein the Closure body is designed in the form of a trough, wherein the trough with its edge at the open end with the associated free End of the bellows is connected, the trough itself with its side wall extends along the inside of the bellows and the bottom of the trough as a movable Valve member of the flow of Hydraulikfluidum controlling
  • the invention has the object based, an accumulator of the generic type under consideration create, in contrast, by improved operating characteristics especially in areas of minimum volume the gas space of the store.
  • a trough mounted on the trough is provided which concentrically extends to the longitudinal axis of the storage enclosure and with a second movable valve member is connected, which is at a given Smallest value of the volume of the gas space exceeding movement of the trough with a stream of Hydraulikfluidum in the oil chamber locking, second valve seat cooperates, opens up the advantageous Possibility, even the smallest value of the volume of the gas space corresponding end position of the trough with the aid of an oil-side valve to control.
  • the used construction, in which the bellows the outside of a gas side Surrounding open trough is beneficial in several ways. As the whole Interior of the trough is available as part of the gas space is reached one optimal ratio between total size of the storage enclosure and volume of the gas space. While at the top of the beginning mentioned, known pressure accumulator sufficient volume of the gas space can only be realized that one for the end plate of the Metal bellows a sufficient stroke in the storage enclosure allows what leads to the mentioned overload problems of the bellows, can in the Invention of the extension of the bellows corresponding stroke of the closure body be made practically arbitrarily small. In other words said, the storage case can be shaped so that it after a short time Stroke movement of the trough forms a mechanical stop because the entire interior of the trough as gas volume available stands.
  • the bellows are protected in this way not only against overstretching, but, as it surrounds the outside of the trough, the bellows is included in the gas space prevailing overpressure also mechanically on the outside supported on the entire length of the trough This in turn allows the Build-up of the gas pre-charge pressure even before starting up the accumulator, i.e. before the hydraulic system is connected on the oil side. If the latter the case is and once the operating pressure is built up in the oil room, is controlled by the outflow of Hydraulikfluidum from the oil chamber Valve maintained pressure balance at the bellows.
  • the trough is circular cylindrical shaped, and the depth of the trough Is dimensioned so that its serving as a valve member bottom as a movable circular valve disc cooperates with a valve seat, the the inner wall of the storage housing is formed.
  • an O-ring to form an annular Be provided sealing surface.
  • the valve lifter also has a guiding function in the stroke movement of the Balges, so that a perfect fit of serving as Veritilglied trough floor at the valve seat and thus a perfect locking of the valve guaranteed are.
  • the bellows works in equilibrium, can be a lightweight construction of the bellows, which is not only for weight reduction, but also leads to a particularly good response.
  • FIGURE shows a longitudinal section of the embodiment of the Pressure accumulator.
  • the illustrated embodiment of the pressure accumulator is in particular intended for use in electrohydraulic brake systems and has a memory housing designated as a whole by 1.
  • This has a substantially nikzytinderförmigen main part 3, on the one hand by a welded bottom cover 5 and on the other hand by a welded, flat curved end cap 7 is closed.
  • a central hydraulic connection 9 with passages 11 for Inlet and outlet of a hydraulic fluid to the oil chamber 13 within the Storage enclosure 1 is provided.
  • a centrally located Gas filling opening provided which is closed by a plug 15 and it allows, by filling with a compressible gas in the adjacent Gas space 17 of the storage enclosure 1 a desired gas pre-charge pressure to produce, for example, by filling with nitrogen.
  • a metal bellows 19 which has a circular cylindrical shape has and is firmly connected at one end to the bottom cover 5.
  • Outer diameter of the metal bellows 19 is slightly smaller than the inner diameter of the cylindrical main part 3 of the storage enclosure 1.
  • An his bottom end 5 opposite free end is the metal bellows 19 sealed by a closure body in the form of a trough 21.
  • This is circular cylindrical in the embodiment shown shaped and has an outer diameter which is slightly less than the inner diameter of the metal bellows 19.
  • the trough 21 is at its open End 23 with an outwardly folded, flange-like edge 25 am associated free end of the metal bellows 19 attached so that the side wall 27 of the trough 21 along the inside of the trough surrounding Metal bellows 19 extends and the interior of the metal bellows 19 only with the narrow annular space 29 between the outside of the side wall 27 of the trough 21 and the inside of the metal bellows 19 a part of Oil space 13 forms.
  • the gas space 17 has a much larger volume, because inside the storage case 1 as the gas space not only the annulus 28 on the outside of the metal bellows 19 and the upper end cap. 7 adjacent room is available, but also the entire Interior of the trough 21.
  • the hydraulic connection 9 is associated with a double-acting oil valve 31, the two the flow of Hydraulikfluidum through the passages 11 in each mutually opposite flow direction blocking or releasing valve units, by movements of the metal bellows 19 and thus of the trough 21 are controllable when the metal bellows 19 due to pressure differences in the oil chamber 13 and the gas space 17 contracts or pulls out and the trough 21 a corresponding Movement along the central longitudinal axis 33 of the storage housing 1 executes.
  • the depth of the trough 21 is dimensioned so that when unloaded metal bellows 19, for example, if both ⁇ lrauml 3 and 17 gas space are depressurized, the trough bottom 35 to near the inner wall 37 the bottom lid 5 extends.
  • the trough bottom 35 is a circular valve plate designed with the adjacent inner wall 37, as assigned Valve seat is designed, which forms one of said valve units.
  • Valve seat is designed, which forms one of said valve units.
  • to Formation of sealing surfaces are an O-ring 39 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 is provided, wherein the O-rings 39 and 41 respectively in corresponding Ring grooves are added. Due to the due to Diameter of the trough 21 conditional, relatively large radial Distance of the sealing surfaces of the central longitudinal axis 33 is a large area Seal and thus a very safe locking of the valve ensured.
  • the second valve unit has a valve body 43, which has an on Trough bottom 35 attached valve lifter 45 together with the trough 21 movable is.
  • the valve stem 45 extends through a central bore 47 in the bottom cover 5 from the storage case 1 out.
  • the valve body 43 acts with a formed in the hydraulic connection 9 valve seat 49th together and has an attachable to the valve seat O-ring 50.
  • the trough 21 moves at a contraction the metal bellows 19 due to an overpressure state in the gas space 17th opposite the oil chamber 13 with its serving as a valve plate trough bottom 35 to the inner wall 37 of the bottom cover 5, so that the O-rings 39 and 41 for engagement with corresponding surfaces of the valve seat or valve disk come and a drain of Hydraulikfluidum through the passages 11th is blocked from the oil chamber 13.

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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)
  • 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)

Claims (5)

  1. Accumulateur de pression hydropneumatique comprenant un soufflet (19) séparant une chambre à gaz (17) d'une chambre à huile (13) à l'intérieur du logement d'accumulateur (1), en particulier un soufflet métallique, qui est fixé au niveau d'une de ses extrémités au logement d'accumulateur (1), de sorte que la chambre à huile (13) est adjacente au côté intérieur du soufflet (19), lequel soufflet est fermé au niveau de son autre extrémité libre par un obturateur (21) mobile en fonction des modifications du volume de la chambre à gaz (17) et de la chambre à huile (13), et comprenant une soupape (31) bloquant ou libérant l'écoulement du fluide hydraulique depuis la chambre à huile (13) ou dans celle-ci, qui, à l'occasion d'un déplacement de l'obturateur (21), qui correspond à une augmentation du volume de la chambre à gaz (17) dépassant une valeur maximale prédéfinie, à travers laquelle l'obturateur (21) peut être amené dans sa position de blocage, l'obturateur étant conçu sous forme d'un bac (21), le bac (21) étant relié avec son bord (25) situé sur l'extrémité ouverte (23) à l'extrémité libre associée du soufflet (19), le bac (21) s'étendant avec sa paroi latérale (27) le long du côté intérieur du soufflet (19) et le fond (35) du bac (21) étant conçu comme un élément de soupape mobile de la soupape (31) commandant l'écoulement du fluide hydraulique, caractérisé en ce qu'un poussoir de soupape (45) fixé sur le fond du bac (35) est prévu, qui s'étend de façon concentrique par rapport à l'axe longitudinal (33) depuis le logement d'accumulateur (1) et est relié à un second élément de soupape mobile (43), qui coopère, à l'occasion d'un déplacement du bac (21) dépassant une valeur minimale prédéfinie du volume de la chambre à gaz (17), avec un second siège de soupape (49), bloquant l'écoulement du fluide hydraulique dans la chambre à huile (13).
  2. Accumulateur de pression hydropneumatique selon la revendication 1, caractérisé en ce que le bac (21) présente une forme de type cylindrique circulaire et sa profondeur est dimensionnée de sorte que son fond (35) servant d'élément de soupape coopère comme une tête de soupape mobile circulaire avec un siège de soupape, qui est conçu sur la paroi intérieure (37) du logement d'accumulateur (1).
  3. Accumulateur de pression hydropneumatique selon la revendication 2, caractérisé en ce que le siège de soupape est disposé de façon concentrique par rapport à l'axe longitudinal central (33) du logement d'accumulateur (1) configuré comme un corps rotationnel et entoure un passage (11) pour le fluide hydraulique.
  4. Accumulateur de pression hydropneumatique selon la revendication 3, caractérisé en ce que des surfaces d'étanchéité (39, 41) sont prévues de manière concentrique à l'axe longitudinal (33) sur la tête de soupape et sur le siège de soupape dans leur zone marginale située à l'extérieur respectivement dans le sens radial.
  5. Accumulateur de pression hydropneumatique selon l'une des revendications 1 à 4, caractérisé en ce que des surfaces d'étanchéité sont formées sur les éléments de soupape mobiles et/ou les sièges de soupape associés par des joints toriques (39, 41) reposant dans des rainures annulaires.
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
DE10003648A DE10003648A1 (de) 2000-01-29 2000-01-29 Hydropneumatischer Druckspeicher
DE10003648 2000-01-29
PCT/EP2001/000442 WO2001055602A1 (fr) 2000-01-29 2001-01-17 Accumulateur de pression hydropneumatique

Publications (2)

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

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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
DK2519748T3 (en) * 2009-12-30 2017-01-30 Hydac Technology Gmbh Hydraulic accumulator, especially bellows accumulator
EP2714102B1 (fr) 2011-06-03 2018-10-10 Microlin, LLC Dispositif pour délivrance de liquides volatils à un environnement gazeux
CN105074229B (zh) * 2013-07-29 2016-12-28 伊格尔工业股份有限公司 蓄能器
JP6657188B2 (ja) * 2015-04-02 2020-03-04 イーグル工業株式会社 アキュムレータ
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
US6622755B2 (en) 2003-09-23
JP2003521643A (ja) 2003-07-15
ES2240397T3 (es) 2005-10-16
WO2001055602A1 (fr) 2001-08-02
US20030000589A1 (en) 2003-01-02
DE10003648A1 (de) 2001-08-09
JP3971188B2 (ja) 2007-09-05
DE50106255D1 (de) 2005-06-23
ATE295941T1 (de) 2005-06-15
EP1250533A1 (fr) 2002-10-23

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