EP2588761A1 - Accumulateur de pression - Google Patents

Accumulateur de pression

Info

Publication number
EP2588761A1
EP2588761A1 EP11726353.3A EP11726353A EP2588761A1 EP 2588761 A1 EP2588761 A1 EP 2588761A1 EP 11726353 A EP11726353 A EP 11726353A EP 2588761 A1 EP2588761 A1 EP 2588761A1
Authority
EP
European Patent Office
Prior art keywords
pressure accumulator
subspace
accumulator according
housing
fluid
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
EP11726353.3A
Other languages
German (de)
English (en)
Other versions
EP2588761B1 (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 EP2588761A1 publication Critical patent/EP2588761A1/fr
Application granted granted Critical
Publication of EP2588761B1 publication Critical patent/EP2588761B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F15B1/10—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
    • 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
    • F15B2201/3152—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
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3158—Guides for the flexible separating means, e.g. for a collapsed bladder

Definitions

  • the invention relates to a pressure accumulator comprising sub-spaces arranged in a housing, a first sub-space arranged between the housing and a flexible separating diaphragm, a second sub-space arranged between the separating diaphragm and a supporting body, and a third sub-volume encompassed by the supporting body, wherein the first sub-space comprises a first sub-space the first fluid can be filled, wherein the second subspace and the third subspace are fluidly connected to each other and filled with a second fluid, and wherein the first and the second subspace vary by movements of the separation membrane depending on the respective Beglal- lungs Congress in their respective size.
  • Such a pressure accumulator is known from DE 101 13 41 5 A1.
  • a flexible separating element is arranged in a storage housing, formed by a pipe end piece, and surrounds a support body having fluid passages.
  • the support body has at least sections on a non-circular cross-sectional shape.
  • the separating element is anchored to the storage housing so as to form a seal, so that separate receiving spaces are formed on the outside and inside of the separating element.
  • a central, continuous bore forms a passage for a storage medium leading to the inner receiving space of the storage. For filling the outside gas space a gas valve is provided.
  • the known pressure accumulator can be used for energy storage, for example in conjunction with vehicle suspensions, or as a pulsation damper. Furthermore, the known solution is particularly suitable for damping pressure peaks in hydraulic or other fluid power systems. For use as an accumulator for storage media in the form of chemically aggressive fluids, such as urea-water solution, the known solution leaves nothing to be desired.
  • Another pressure accumulator is known from DE 38 10 509 C2.
  • a pressure accumulator comprising a container main body with an outer tube of cylindrical shape, at one end of a side plate and at the other end a lid is arranged, at least one inlet opening and an outlet opening, which are formed on the outer tube, and a bladder or A membrane for dividing the interior of the container main body into a gas chamber and a liquid chamber, wherein an opening of the bubble is sealed by the lid.
  • An insert is arranged to project into the bladder for the purpose of reducing the volume of the gas chamber.
  • the insert is formed of a foot part, a middle part and a head part, wherein the head part is kept in contact with the bottom of the membrane, which makes it possible to prevent damage to the membrane by repeated contraction. In the contracted state, the bladder or membrane rests against the insert.
  • Pressure accumulators of this type are widely used in various sizes and structural designs to receive and deliver varying volumes of subject fluids that are under the operating pressure of a fluid system connected to the fluid side, with the bladder on its gas side under a biasing pressure of the working gas forming a pressure pad ,
  • the operational safety of the pressure accumulator depends primarily on the usually made of a plastic material, especially butyl, existing from memory bladder, which is not only exposed to mechanical stresses in operation, but should also be resistant to chemically aggressive storage fluids.
  • aggressive fluids such as urea-water solutions
  • the so-called "urea injection” is increasingly used in vehicle technology to reduce the nitrogen oxides (NOx) emissions by injecting into the exhaust gas flow of internal combustion engines ,
  • the invention has the object of providing a pressure accumulator which, in conjunction with aggressive storage media, is distinguished by improved operational reliability and is accordingly particularly suitable for use in urea injection in vehicle technology.
  • an essential feature of the invention is that the first fluid is a storage medium and the second fluid is a working medium, and that the second subspace increases upon removal of storage medium from the pressure accumulator and upon filling of the pressure accumulator with storage medium reduced.
  • the male amount of working medium is determined.
  • the flexible separation membrane is moved to the effect that the second subspace adjacent to the third subspace outside the support body is reduced. Accordingly, when a removal or decreasing Be Shel development of the first subspace with storage medium of the second subspace is increased.
  • the pressure accumulator is designed as a hydropneumatic bladder accumulator for a gaseous working medium and / or a liquid storage medium.
  • the pressure accumulator for filling a storage medium in the form of a chemically aggressive fluid, such as urea-water solution is formed.
  • a chemically aggressive fluid such as urea-water solution.
  • the support body and the separation membrane are shaped and dimensioned such that the support body at a fixed limit exceeding volume size of the first subspace, in other words at a maximum value for the recording medium to be recorded volume size, a support for the separation membrane forms.
  • the housing and the separating membrane are shaped and dimensioned in such a way that the separating membrane rests against the housing at least partially when the first subspace is completely emptied.
  • the separation membrane may be shaped and dimensioned such that it is spaced apart from the support body and spaced from the housing upon complete emptying of the first subspace.
  • the support body or the housing thus form an effective protection for the separation membrane against overstressing when pressure is exceeded.
  • tions in the first and second subspace in that the separation membrane or the storage bubble can abut the support body or on the housing and is thereby protected when pressure is exceeded against crushing.
  • the reduced mechanical stress leads to an increase in the safe life of the separation membrane, even when exposed to chemically aggressive media, such as a urea-water solution.
  • the housing has a head part which adjoins the second and / or third subspace and forms the closure of the housing.
  • the housing is expediently cup-shaped, wherein the first part is arranged on the bottom side.
  • a connection device for the second fluid can be provided.
  • a holding body is provided on the head part, on which the opening edge of the separating membrane is anchored.
  • the holding body preferably forms a holding part, on which the supporting body is arranged.
  • the holding body has the shape of a bell whose bell casing surrounds a fourth subspace adjoining the third subspace. In this way, the absorption capacity of the pressure accumulator for the second fluid or the typically gaseous working medium is increased and at the same time the material requirement for the formation of the pressure accumulator is reduced.
  • the support body has the shape of a body of revolution, rounded at the end facing the first part space and formed closed and with at least one lateral wall opening as a passage point between the second and third partial space is provided.
  • the arrangement can be made with advantage so that the head part has a 29aubbares with the housing cover part with inner wall parts in the form of a concentric to the axis of the housing spherical cap, and that is arranged within the cover part of the holding body such that between the outer wall in the form of spherical surface parts and the inner wall parts of the cover part, a gap for receiving a bordering on the edge of the opening edge region of the separation membrane is formed.
  • a particularly secure anchoring of the separating membrane can be achieved if the holding body has an annular groove machined into the outer wall in an area axially offset from its holding part in the direction of the connecting device, in which an edge bead surrounding the edge of its opening engages for anchoring the separating membrane.
  • connection device has a screw socket which engages through an opening concentric to the central axis of the lid part and which pulls the holding body against the inner wall of the lid part by screwing with the cover part and clamps the edge region of the separating membrane located in the gap.
  • the arrangement may be made such that the holding body forms a circular cylinder in the region of the holding part, on the edge region of which latching elements are formed which form a snap-in connection with counter-elements on the supporting body.
  • This kind the anchoring of the support body is particularly easy to install and allows low production costs.
  • the locking elements can be offset from the end edge of the outer wall of the holding part and formed by depressions of the outer wall of the holding part, in which a bead-like, radially inwardly projecting projection on the inside of the support body can be snapped.
  • the locking elements on the inner wall of the holding member by one of the end edge axially remote recess and a radially inwardly projecting, adjoining the end edge projection may be latched with counter-elements of over the circumference of the opening of the support body vertei Lten latching fingers.
  • the assembly is particularly simple and convenient.
  • individual locking fingers may be provided at the end edge of the support body.
  • the support body is preferably formed of a plastic material.
  • this glass fiber-reinforced polyarylamide IXEF ® a material, which is distinguished over conventional glass fiber reinforced plastics by a smooth, closed outer skin can be provided. Because of these properties, the holding body and / or the connection device can be formed from this material in an advantageous manner.
  • Fig. 1 shows a comparison with a practical embodiment only slightly enlarged illustrated longitudinal section of an embodiment of the pressure accumulator according to the invention
  • FIG. 2 shows a longitudinal section of only one holding body with supporting body fixed thereto for the embodiment of FIG. 1;
  • FIG. 3 is a comparison with FIG. 2 greatly enlarged detail of FIG.
  • FIG. 4 shows a longitudinal section similar to FIG. 2, in which a modified example of the latching of the supporting body on the holding body is shown.
  • a memory housing is denoted by 2, which has the shape of a large cylindrical pot on the closed bottom 4, a flow opening 6 is located on the whole.
  • the aligned on the central longitudinal axis 10 opening 6 allows the supply and removal of a first fluid, such as a urea-water solution, to or from the first compartment 8, which is located in the housing 2 adjacent to the bottom 4.
  • a screwed to the storage housing 2 head part 1 2 forms the fluid-tight closure of the upper, open end of the housing second
  • the head part 12 has an outer cover part 14 on which the screw connection with the housing 2 is formed and which may consist of a metallic material, for example of aluminum, as may also be the case with the housing 2. Alternatively, the cover part 14 may also be formed from a structurally stable plastic material.
  • the cover part 14 has a central, concentric with the axis 10 opening 16. At a slight distance from the opening 16, the cover part 14 has inner wall parts in the form of a spherical cap 18 concentric with the axis 10.
  • the head part 1 2 a holding body 20, with an integrally located thereon, the connection means for the second fluid forming screw 22, which passes through the opening 1 6 of the cover member 14 and by means of which, in cooperation with a nut 24 of the holding body 20th is set within the lid part 14.
  • Screw socket 22 extends a central fluid channel 26 to fill a third subspace 28 with the standing under bias pressure working fluid as a second fluid.
  • a located within the channel 26 valve insert is not shown in the drawing.
  • the holding body 20 has the shape of a bell whose shell surrounds a fourth subspace 30 which adjoins the third subspace 28.
  • the bell shell forms on its outer wall spherical surface parts 34 which define a clamping gap 36 for the anchoring region 38 located in the gap 36 of a separation membrane 40 between itself and the cap 18 of the cover part.
  • the bladder formed from a plastic suitable for such pressure accumulators, such as butyl, forms the flexible separating membrane 40 between the first subspace 28 and the second subspace 54.
  • the holding body 20 has an annular groove 42 between the end of the outer spherical surface part 34 and the screw neck 22, into which for particularly secure anchoring of the separation membrane 40 engages an edge rim 44 surrounding its opening edge.
  • the holder body 20 forms with which located within the bran by the Trennmem- 40 formed bubble cap, a holding portion 46 for anchorage of a projecting into the interior of the bladder support body 48.
  • This is formed of a sufficiently structurally rigid plastic material, with glass fiber-reinforced polyarylamide IXEF ® as has proved particularly well.
  • the support body 48 has the shape of a rotation body with a spherically rounded, closed lower end situated at a distance from the bottom 4 of the housing 2 and surrounding one The other, upper end 50 of the support body 48 is on Gartei l 46 by means of a
  • the support body 48 is approximately V-shaped in longitudinal section and has lateral wall openings 52 for the passage of the working fluid to the second partial space 54, which adjoins the third partial space 28.
  • FIG. 2 and 3 The details of the snap connection can be seen most clearly in Figures 2 and 3.
  • recesses 56 and 60 are formed at a small distance from the end edge 56 of the holding member, in which the end portion of the support body 48 is receivable, wherein a radially inwardly projecting projection 62 of the support body 48 can be snapped into the recess 60.
  • the holding body 20 is formed in the present example, as well as the support body 48 and located in the channel 26 of the nozzle 22 valve made of glass fiber reinforced polyarylamide IXEF ® , so that the holding body 20 is formed therewith a support body 48 is a completely made of plastic unit.
  • the first subspace 8 of the pressure accumulator is filled by means of a pump with the urea-water solution until an upper value of the system pressure is reached and the pump shuts off.
  • the accumulator pressure forces the metered injection storage medium into the system.
  • the pump switches on again. If there are unwanted pressure violations and a certain
  • FIG. 4 shows a variant of the design of the snap connection, wherein the locking elements now on the inner wall of the holding part 46 of the Holding body 20 are arranged. As shown in FIG. 4, this is a recess 64 axially remote from the end edge 56 and a radially inwardly projecting, adjoining the end edge 56 projection 66.
  • the counter-elements on the part of the support body 48 are formed by holding fingers 68, the are distributed over the circumference of the opening of the support body 48.
  • the latching on the outside of the holding member 46 of the holding body 20, the counter-elements of the support body 48 may be formed of individual, circumferentially distributed locking fingers.

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)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Accumulateur de pression à chambres partielles (8, 54, 28) disposées dans un boîtier (2), cet accumulateur comportant une première chambre partielle (8) disposée entre le boîtier (2) et une membrane de séparation (40) souple, une deuxième chambre partielle (54) disposée entre la membrane de séparation (40) et un corps d'appui (48) et une troisième chambre partielle (28) entourée par le corps d'appui (48), la première chambre partielle (8) pouvant être remplie d'un premier fluide, la deuxième chambre partielle (54) et la troisième chambre partielle (28) étant interconnectées pour un passage de fluide et pouvant être remplies d'un deuxième fluide, et la première et la deuxième chambre partielle (8,54) présentant des dimensions respectives variant en fonction du niveau de remplissage qui fait déplacer la membrane de séparation (40). L'invention est caractérisée en ce que le premier fluide est un agent d'accumulation et le deuxième fluide est un agent de travail, et en ce que la deuxième chambre partielle (54) augmente de volume lorsque l'agent d'accumulation est extrait de l'accumulateur de pression et qu'elle diminue de volume lors du remplissage de l'accumulateur de pression en agent d'accumulation.
EP11726353.3A 2010-06-30 2011-06-17 Accumulateur de pression Active EP2588761B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010025627A DE102010025627A1 (de) 2010-06-30 2010-06-30 Hydropneumatischer Blasenspeicher
PCT/EP2011/002989 WO2012000616A1 (fr) 2010-06-30 2011-06-17 Accumulateur de pression

Publications (2)

Publication Number Publication Date
EP2588761A1 true EP2588761A1 (fr) 2013-05-08
EP2588761B1 EP2588761B1 (fr) 2014-07-16

Family

ID=44627293

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11727121.3A Active EP2588762B1 (fr) 2010-06-30 2011-06-17 Accumulateur de pression et pièce d'insertion pour accumulateur de pression
EP11726353.3A Active EP2588761B1 (fr) 2010-06-30 2011-06-17 Accumulateur de pression

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11727121.3A Active EP2588762B1 (fr) 2010-06-30 2011-06-17 Accumulateur de pression et pièce d'insertion pour accumulateur de pression

Country Status (4)

Country Link
US (1) US9133859B2 (fr)
EP (2) EP2588762B1 (fr)
DE (1) DE102010025627A1 (fr)
WO (2) WO2012000617A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015010562A1 (de) * 2015-08-12 2017-02-16 Hydac Filtertechnik Gmbh Filtervorrichtung nebst Filterelement
JP2023508128A (ja) 2019-12-20 2023-03-01 エル イー エス エス・リミテッド 光導波路ベースの側面照明アセンブリ、細長い補強構造、及びレセプタクル
CN112032454B (zh) * 2020-09-21 2022-05-17 北京航空航天大学 气液耦合式流体脉动消振器
CN112555559B (zh) * 2020-11-24 2022-04-26 江苏大学 一种泵入口非均匀来流抑制装置
FR3119211A1 (fr) * 2021-01-26 2022-07-29 Dominique JOSSE La présente invention concerne un dispositif destiné à gérer le stockage d’un fluide dans des conditions de rendement et/ou sécurité de fonctionnement accrue.

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Also Published As

Publication number Publication date
DE102010025627A1 (de) 2012-01-05
EP2588761B1 (fr) 2014-07-16
EP2588762B1 (fr) 2015-04-15
WO2012000617A1 (fr) 2012-01-05
WO2012000616A1 (fr) 2012-01-05
US20130126026A1 (en) 2013-05-23
US9133859B2 (en) 2015-09-15
EP2588762A1 (fr) 2013-05-08

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