EP1327081A2 - Hydroaccumulator, in particular a bladder accumulator - Google Patents

Hydroaccumulator, in particular a bladder accumulator

Info

Publication number
EP1327081A2
EP1327081A2 EP01987851A EP01987851A EP1327081A2 EP 1327081 A2 EP1327081 A2 EP 1327081A2 EP 01987851 A EP01987851 A EP 01987851A EP 01987851 A EP01987851 A EP 01987851A EP 1327081 A2 EP1327081 A2 EP 1327081A2
Authority
EP
European Patent Office
Prior art keywords
fluid
valve body
piston
bore
hydraulic accumulator
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
EP01987851A
Other languages
German (de)
French (fr)
Other versions
EP1327081B1 (en
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 EP1327081A2 publication Critical patent/EP1327081A2/en
Application granted granted Critical
Publication of EP1327081B1 publication Critical patent/EP1327081B1/en
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
    • F15B1/16—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means in the form of a tube
    • F15B1/165—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means in the form of a tube in the form of a bladder
    • 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
    • F15B2201/41—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
    • F15B2201/43—Anti-extrusion means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7784—Responsive to change in rate of fluid flow
    • Y10T137/7792—Movable deflector or choke

Definitions

  • Hydraulic accumulators especially bladder accumulators
  • the invention relates to a hydraulic accumulator, in particular a bladder accumulator, with a pressure container, a separating element arranged therein, which separates a gas space adjacent to a gas-side access from a fluid space in the pressure container, which adjoins a fluid-side access which has a fluid connecting piece. and with a valve arrangement located on the connecting piece with a valve body having at least one transverse bore, which is normally pretensioned into its open position which opens the fluid passage and can be moved into its closed position by movement of the separating element, the inner surface of the connecting piece for the valve body which is in direct contact with it forms the guide for its movement between the open position and the closed position.
  • Hydraulic accumulators of this type are commercially available.
  • a bladder accumulator of the above-mentioned type is shown and described on page 165.
  • the valve arrangement is designed as a seat valve, with the end edge of the connecting piece facing the fluid chamber as fixed valve seat a conical surface is formed which with a corresponding conical surface on a Valve plate of the movable valve body interacts.
  • valve disk is located on a shaft which is guided in a valve guide for the valve stroke movement between the open position and the closed position and which is installed in the connecting piece.
  • a disadvantage here is the resulting high manufacturing costs due to the effort required to manufacture and process the large number of individual parts caused by this valve construction.
  • the valve guide installed in the connecting piece must be carefully designed with regard to the manufacturing tolerances, both in terms of alignment and fit.
  • a corresponding machining of the conical surfaces forming the valve seat is also necessary.
  • a generic hydraulic accumulator is known from PCT / WO 00/31420, the separating element of which is formed from a metal bellows.
  • a compression spring is arranged within the bellows and holds the separating element in the prestressed state.
  • the metal bellows is provided with an end plate which interacts with a valve body which is held under spring preload in the fluid connection piece of the housing of the known hydraulic accumulator.
  • the valve body is designed as a valve tappet and is larger in its longitudinal orientation than in the transverse direction, so that the known valve body takes up a lot of installation space in its direction of movement in the connecting piece.
  • the end of the valve body cooperating with the end plate is dome-shaped, so that in connection with the different diameters, grooves and recesses, bevelled surfaces and one Cross bore at the other end of the valve body creates a complex geometry that requires a complex and costly machining process in the manufacture.
  • the complicated geometric structure of the closing body also continues in the area of the fluid guide and due to the multiple deflection of the fluid flow, an unfavorable flow pattern is realized, in particular in the area of the inflow of the medium into the fluid space, so that the known solution for hydraulic accumulators with sensitive membrane bubbles is not proves suitable.
  • the task is to further improve the known hydraulic accumulator in such a way that the valve body takes up little installation space, that it has a simple geometric design and is therefore inexpensive to implement, and allows an optimized flow pattern in the region of the inflow into the fluid space.
  • a related problem is solved by a hydraulic accumulator with the features of claim 1 in its entirety.
  • the valve body on its side facing the separating element is designed as a flat plate, that the respective transverse bore delimited by the plate at least partially opens into the fluid space in the open position and that the diameter of the valve body is larger is measured as its height measured in the direction of movement of the valve body, the valve arrangement is constructed in the manner of a plate valve, which takes up little space and can be realized inexpensively.
  • the fluid channels required for controlling the fluid flow are integrated in their entirety into the interior of the valve body, so that complex processing for a differentiated shape of the outer surface of the valve body is eliminated.
  • valve arrangement is designed in the manner of a slide valve and the connecting piece serving as the valve housing, with its circular cylindrical inner surface, defines the piston bore for the valve body designed as a slide piston.
  • the arrangement can be such that the end edge of the piston bore of the connecting piece adjoining the fluid space forms the control edge for releasing and closing one or more fluid channels of the slide piston.
  • the number and cross-sectional size of bores formed in the slide piston, which serve as fluid channels, can be selected so that a desired throttling results when the fluid passes through, so that the optimum damping conditions result in each case depending on the intended use during operation of the hydraulic accumulator.
  • the piston bore guiding the slide piston can preferably have a tapered bore section at its end region adjacent to the fluid space, through which a ring shoulder surface is formed which, in cooperation with a radial projection on the slide piston the counter shoulder surface forms a stop against which the slide piston rests in the open position of the valve.
  • FIG. 1 shows a broken longitudinal section of an exemplary embodiment of a bladder accumulator according to the invention, only the part of the accumulator adjacent to the fluid-side connecting piece being shown with the valve arrangement assigned to the connecting piece and being in the open position;
  • FIG. 2 shows a longitudinal section of the fluid connecting piece of a second exemplary embodiment, shown on a much larger scale in comparison to FIG. 1, the valve arrangement being shown in the closed position, and
  • FIG. 3 shows a section similar to FIG. 1, a third embodiment and fourth embodiment being shown on the left and right and the valve arrangement being shown in the open position.
  • FIG. 1 In the drawing of FIG. 1, only the section adjacent to the fluid-side access 3 of the pressure vessel 1 is shown. At the opposite end region of the pressure vessel 1, not shown, there is a gas-side access to the interior of a storage bladder 5, which is only indicated in FIG. 3 and which forms the movable separating element. det, which separates the gas space 7 located in its interior from the fluid space 9.
  • a fluid connection stub 11 at the adjacent end of the fluid space 9 is welded into the wall of the pressure container 1 as the fluid-side access 3.
  • the connecting piece 1 1 is designed in the form of a circular cylindrical sleeve which has an internal thread 13 in the section adjoining its free, outer end for the connection of a fluid line, not shown.
  • the connecting piece 11 forms a piston bore 15, in which a slide piston 17 is displaceably guided.
  • connection piece 1 1 thus forms the valve housing for a slide valve with the slide piston 1 7 serving as a movable valve body, which is guided on the inner surface of the piston bore 15 of the connection piece 1 1 directly for its movement along the longitudinal axis 19 of the piston bore 15 and between an in 1 and 3 and a closed position shown in Fig. 2 is movable.
  • the slide piston 17 is biased by a helical compression spring 21 into the open position shown in FIGS. 1 and 3. From this position, it can be moved against the force of the compression spring 21 into the closed position shown in FIG. 2 when the storage bladder 5 is correspondingly expanded when it presses against the upper side 23 of the storage piston 17.
  • the compression spring 21 is supported with its end facing away from the spool 17 on a support plate 25 which rests in the connecting piece 11 on a shoulder located at the adjacent end of the piston bore 15 : and is held in the embodiment of FIG. 1 by a retaining ring 27.
  • the support plate 25 secured by means of a flat snap ring 29.
  • the embodiment of FIG. 2 corresponds to that of FIG. 1.
  • the piston bore 15 forms in its end section a tapered bore section with an annular shoulder surface 39, which in cooperation with a counter-shoulder surface provided on the slide piston 1 7 41 (see FIG. 2)
  • the support plate 25 which forms the abutment for the compression spring 21 is provided with an external thread and is screwed into the internal thread 13 formed at the end in the connecting piece 11.
  • the connecting piece 11 in the section adjacent to the end edge 37 has an external thread 43 which is screwed to a corresponding internal thread of the wall of the pressure vessel 1.
  • the wall thickness of the pressure vessel 1 is made larger in the threaded area.
  • the exemplary embodiment shown on the right in FIG. 3 has a connecting piece 11 integrally formed on the pressure vessel 1 by hot or cold forming and does not differ from the example shown on the left in the same figure.

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)

Abstract

The invention relates to a hydroaccumulator, in particular a bladder accumulator. Said accumulator comprises a pressurised container (1), a separation element (5) which is located in said container and separates a gas chamber (7) in the pressurised container (1), lying adjacent to an inlet on the gas side from a fluid chamber (9), lying adjacent to an inlet on the fluid side (3), said inlet having a fluid connecting sleeve (11) and a valve arrangement located on the connecting sleeve (11), said arrangement having at least one valve body (17) that has a transversal bore (33). The valve body is usually pretensioned in an open position which allows the passage of fluid and can be displaced into a closed position by a displacement of the separation element (5), the interior surface (15) of the connecting sleeve (11), which lies directly against the valve body (17), guiding the displacement of said body between the open and closed positions. As the side of the valve body (17') that faces the separation element (5) is configured as a plate running on one plane, as the respective transversal bore (33), which is delimited by the plate (17') in the open position, opens at least partially into the fluid chamber (9) and as the diameter of the valve body (17) is greater than its height, measured in the direction of displacement of said valve body (17), the valve arrangement has a plate-valve construction of small proportions and can be cost-effectively produced.

Description

Hydrospeicher, insbesondere Blasenspeicher Hydraulic accumulators, especially bladder accumulators
Die Erfindung bezieht sich auf einen Hydrospeicher, insbesondere Blasenspeicher, mit einem Druckbehälter, einem in diesem angeordneten Trennelement, das im Druckbehälter einen an einen gasseitigen Zugang angrenzenden Gasraum von einem Fluidraum trennt, der an einen fluidseitigen Zugang angrenzt, welcher einen Fluid-Anschlußstutzen aufweist, und mit einer am Anschlußstutzen befindlichen Ventilanordnung mit einem mindestens eine Querbohrung aufweisenden Ventilkörper, der normalerweise in seine den Fluiddurchgang freigebende Offenstellung vorgespannt und durch eine Bewegung des Trennelementes in seine Schließstellung beweg- bar ist, wobei die Innenfläche des Anschlußstutzens für den an ihr unmittelbar anliegenden Ventilkörper die Führung für dessen Bewegung zwischen Offenstellung und Schließstellung bildet.The invention relates to a hydraulic accumulator, in particular a bladder accumulator, with a pressure container, a separating element arranged therein, which separates a gas space adjacent to a gas-side access from a fluid space in the pressure container, which adjoins a fluid-side access which has a fluid connecting piece. and with a valve arrangement located on the connecting piece with a valve body having at least one transverse bore, which is normally pretensioned into its open position which opens the fluid passage and can be moved into its closed position by movement of the separating element, the inner surface of the connecting piece for the valve body which is in direct contact with it forms the guide for its movement between the open position and the closed position.
Hydrospeicher dieser Art sind handelsüblich. In einem von der Firma Mannesmann Rexroth GmbH herausgegebenen Fachbuch „Der Hydraulik Trainer Band \ " ist auf Seite 165 ein Blasenspeicher der obengenannten Art dargestellt und beschrieben. Bei dem bekannten Blasenspeicher ist die Ventilanordnung als Sitzventil ausgebildet, wobei am dem Fluidraum zugekehrten Endrand des Anschlußstutzens als feststehender Ventilsitz eine Kegelflä- ehe ausgebildet ist, die mit einer entsprechenden Kegelfläche an einem Ventilteller des beweglichen Ventilkörpers zusammenwirkt. Dieser ist ähnlich gestaltet wie die bei ventilgesteuerten Verbrennungsmotoren üblichen Steuerventile, d.h. der Ventilteller befindet sich an einem Schaft, der für die zwischen Offenstellung und Schließstellung verlaufende Ventil hubbewe- gung in einer Ventilführung geführt ist, die in den Anschlußstutzen eingebaut ist.Hydraulic accumulators of this type are commercially available. In a specialist book published by Mannesmann Rexroth GmbH, "The Hydraulic Trainer Band \", a bladder accumulator of the above-mentioned type is shown and described on page 165. In the known bladder accumulator, the valve arrangement is designed as a seat valve, with the end edge of the connecting piece facing the fluid chamber as fixed valve seat a conical surface is formed which with a corresponding conical surface on a Valve plate of the movable valve body interacts. This is designed in a similar way to the control valves customary in valve-controlled internal combustion engines, ie the valve disk is located on a shaft which is guided in a valve guide for the valve stroke movement between the open position and the closed position and which is installed in the connecting piece.
Nachteilig hierbei sind die sich ergebenden hohen Herstellungskosten aufgrund des erforderlichen Aufwandes für Herstellung und Bearbeitung der durch diese Ventilbauweise bedingten Vielzahl von Einzelteilen. Um eine einwandfreie Funktion der Ventilanordnung zu gewährleisten, muß die in den Anschlußstutzen eingebaute Ventilführung hinsichtlich der Fertigungstoleranzen, sowohl bezüglich der Fluchtung als auch der Passung, sorgfältig gestaltet sein. Außerdem ist eine entsprechende Bearbeitung der den Ventilsitz bildenden Kegelflächen erforderlich.A disadvantage here is the resulting high manufacturing costs due to the effort required to manufacture and process the large number of individual parts caused by this valve construction. In order to ensure proper functioning of the valve arrangement, the valve guide installed in the connecting piece must be carefully designed with regard to the manufacturing tolerances, both in terms of alignment and fit. A corresponding machining of the conical surfaces forming the valve seat is also necessary.
Durch die PCT/WO 00/31420 ist ein gattungsgemäßer Hydrospeicher bekannt, dessen Trennelement aus einem Metallfaltenbalg gebildet ist. Innerhalb des Faltenbalges ist eine Druckfeder angeordnet, die das Trennelement im vorgespannten Zustand hält. Auf der Unterseite ist der Metallfaltenbalg mit einer Abschlußplatte versehen, die mit einem Ventilkörper zusammenwirkt, der unter Federvorspannung gehalten im Fluidanschlußstutzen des Gehäuses des bekannten Hydrospeichers aufgenommen ist. Der Ventilkörper ist als Ventilstößel ausgebildet und in seiner Längsausrichtung größer dimensioniert als in Querrichtung, so daß der bekannte Ventilkörper in seiner Bewegungsrichtung im Anschlußstutzen viel Bauraum einnimmt. Das mit der Abschlußplatte zusammenwirkende Ende des Ventilkörpers ist kalottenartig ausgebildet, so daß in Verbindung mit den unterschiedlichen Durchmessern, Nuten und Einstichen, abgeschrägten Flächen sowie einer Querbohrung am anderen Ende des Ventilkörpers eine komplexe Geometrie entsteht, die einen aufwendigen und kosten intensiven Bearbeitungsprozeß bei der Herstellung erfordert. Die kompliziert aufbauende geometrische Struktur des Schließkörpers setzt sich auch im Bereich der Fluidführung fort und aufgrund der Mehrfachumlenkung des Fluidstromes ist insbesondere im Bereich der Einströmung des Mediums in den Fluidraum ein ungünstiger Strömungsverlauf realisiert, so daß die bekannte Lösung für Hydrospeicher mit empfindlichen Membranblasen sich als nicht geeignet erweist.A generic hydraulic accumulator is known from PCT / WO 00/31420, the separating element of which is formed from a metal bellows. A compression spring is arranged within the bellows and holds the separating element in the prestressed state. On the underside, the metal bellows is provided with an end plate which interacts with a valve body which is held under spring preload in the fluid connection piece of the housing of the known hydraulic accumulator. The valve body is designed as a valve tappet and is larger in its longitudinal orientation than in the transverse direction, so that the known valve body takes up a lot of installation space in its direction of movement in the connecting piece. The end of the valve body cooperating with the end plate is dome-shaped, so that in connection with the different diameters, grooves and recesses, bevelled surfaces and one Cross bore at the other end of the valve body creates a complex geometry that requires a complex and costly machining process in the manufacture. The complicated geometric structure of the closing body also continues in the area of the fluid guide and due to the multiple deflection of the fluid flow, an unfavorable flow pattern is realized, in particular in the area of the inflow of the medium into the fluid space, so that the known solution for hydraulic accumulators with sensitive membrane bubbles is not proves suitable.
Ausgehend von diesem nächstkommenden Stand der Technik stellt sich die Aufgabe, den bekannten Hydrospeicher derart weiter zu verbessern, daß der Ventilkörper wenig Bauraum einnimmt, daß er geometrisch einfach aufbaut und mithin kostengünstig realisierbar ist sowie einen optimierten Strömungsverlauf im Bereich des Einströmens in den Fluidraum zuläßt. Eine dahingehende Aufgabe löst ein Hydrospeicher mit den Merkmalen des Patentanspruches 1 in seiner Gesamtheit.Starting from this closest prior art, the task is to further improve the known hydraulic accumulator in such a way that the valve body takes up little installation space, that it has a simple geometric design and is therefore inexpensive to implement, and allows an optimized flow pattern in the region of the inflow into the fluid space. A related problem is solved by a hydraulic accumulator with the features of claim 1 in its entirety.
Dadurch, daß gemäß dem kennzeichnenden Teil des Patentanspruches 1 der Ventilkörper an seiner dem Trennelement zugewandten Seite als eben - verlaufende Platte ausgebildet ist, daß die jeweilige Querbohrung von der Platte begrenzt in der Offenstellung zumindest teilweise in den Fluidraum mündet und daß der Durchmesser des Ventilkörpers größer bemessen ist als seine Höhe gemessen in der Bewegungsrichtung des Ventil körpers, ist die Ventilanordnung in der Art eines Plattenventils aufgebaut, welches wenig Bauraum einnimmt und sich kostengünstig realisieren läßt. Die für die An- steuerung des Fluidstromes erforderlichen Fluidkanäle sind in ihrer Gesamtheit in das Innere des Ventilkörpers integriert, so daß eine aufwendige Bearbeitung für eine differenzierte Formgebung der Außenfläche des Ventilkörpers entfällt. Dadurch, daß die jeweilige Querbohrung unterhalb der eben verlaufenden Platte des Ventilkörpers in den Fluidraum in der Offenstellung mündet, ist ein homogenes Ausströmverhalten des Fluids in den Fluidraum gewährleistet, so daß insbesondere bei der Realisierung eines Blasenspeichers die gegenüber Druckspitzen empfindliche Trennmembran, die üblicherweise aus einem gummielastischen Werkstoff besteht, schonend umströmt wird, was zur Erhöhung der Standzeit des erfindungsgemäßen Hydrospeichers führt.Characterized in that, according to the characterizing part of patent claim 1, the valve body on its side facing the separating element is designed as a flat plate, that the respective transverse bore delimited by the plate at least partially opens into the fluid space in the open position and that the diameter of the valve body is larger is measured as its height measured in the direction of movement of the valve body, the valve arrangement is constructed in the manner of a plate valve, which takes up little space and can be realized inexpensively. The fluid channels required for controlling the fluid flow are integrated in their entirety into the interior of the valve body, so that complex processing for a differentiated shape of the outer surface of the valve body is eliminated. The fact that the respective cross hole below the flat plate of the valve body opens into the fluid space in the open position, a homogeneous outflow behavior of the fluid into the fluid space is ensured, so that, particularly when a bladder accumulator is implemented, the separation membrane, which is sensitive to pressure peaks and is usually made of a rubber-elastic material, is gently flowed around, which leads to an increase in the service life of the hydraulic accumulator according to the invention.
Die Herstellung gestaltet sich besonders einfach, wenn die Ventilanordnung in der Art eines Schieberventiles gestaltet ist und der als Ventilgehäuse dienende Anschlußstutzen mit seiner kreiszylindrischen Innenfläche die Kolbenbohrung für den als Schieberkolben ausgebildeten Ventilkörper definiert.The production is particularly simple if the valve arrangement is designed in the manner of a slide valve and the connecting piece serving as the valve housing, with its circular cylindrical inner surface, defines the piston bore for the valve body designed as a slide piston.
Bei derartigen Ausführungsbeispielen kann die Anordnung so getroffen sein, daß der an den Fluidraum angrenzende Endrand der Kolbenbohrung des Anschlußstutzens die Steuerkante für das Freigeben und Verschließen eines oder mehrerer Fluidkanäle des Schieberkolbens bildet.In such exemplary embodiments, the arrangement can be such that the end edge of the piston bore of the connecting piece adjoining the fluid space forms the control edge for releasing and closing one or more fluid channels of the slide piston.
Anzahl und Querschnittsgröße von im Schieberkolben ausgebildeten Bohrungen, die als Fluidkanäle dienen, können so gewählt werden, daß sich beim Fluiddurchtritt eine gewünschte Drosselung ergibt, so daß sich beim Betrieb des Hydrospeichers je nach vorgesehenem Einsatzzweck die jeweils optimalen Dämpfungsverhältnisse ergeben.The number and cross-sectional size of bores formed in the slide piston, which serve as fluid channels, can be selected so that a desired throttling results when the fluid passes through, so that the optimum damping conditions result in each case depending on the intended use during operation of the hydraulic accumulator.
Die den Schieberkolben führende Kolbenbohrung kann vorzugsweise an ihrem dem Fluidraum benachbarten Endbereich einen verjüngten Bohrungsabschnitt aufweisen, durch den eine Ringschulterfläche gebildet wird, die in Zusammenwirkung mit einer am Schieberkolben radial vorspringen- den Gegenschulterfläche einen Anschlag bildet, an dem der Schieberkolben in der Offenstellung des Ventils anliegt.The piston bore guiding the slide piston can preferably have a tapered bore section at its end region adjacent to the fluid space, through which a ring shoulder surface is formed which, in cooperation with a radial projection on the slide piston the counter shoulder surface forms a stop against which the slide piston rests in the open position of the valve.
Nachstehend ist die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen im einzelnen erläutert.The invention is explained in detail below on the basis of exemplary embodiments illustrated in the drawing.
Es zeigen:Show it:
Fig. 1 einen abgebrochenen Längsschnitt eines Ausführungsbeispie- les eines erfindungsgemäßen Blasenspeichers, wobei lediglich der dem fluidseitigen Anschlußstutzen benachbarte Teil des Speichers mit der dem Anschlußstutzen zugeordneten Ventilanordnung, die sich in der Offenstellung befindet, gezeigt ist;1 shows a broken longitudinal section of an exemplary embodiment of a bladder accumulator according to the invention, only the part of the accumulator adjacent to the fluid-side connecting piece being shown with the valve arrangement assigned to the connecting piece and being in the open position;
Fig. 2 einen im Vergleich zu Fig. 1 in wesentlich größerem Maßstab gezeigten Längsschnitt nur des Fluid-Anschlußstutzens eines zweiten Ausführungsbeispieles, wobei die Ventilanordnung in der Schließstellung gezeigt ist, undFIG. 2 shows a longitudinal section of the fluid connecting piece of a second exemplary embodiment, shown on a much larger scale in comparison to FIG. 1, the valve arrangement being shown in the closed position, and
Fig. 3 einen der Fig. 1 ähnlichen Schnitt, wobei linksseitig und rechtsseitig ein drittes Ausführungsbeispiel bzw. viertes Ausführungsbeispiel dargestellt sind und die Ventilanordnung jeweils in der Offenstellung gezeigt ist.3 shows a section similar to FIG. 1, a third embodiment and fourth embodiment being shown on the left and right and the valve arrangement being shown in the open position.
In der Zeichnung von Fig. 1 ist vom Druckbehälter 1 nur der dem fluidseitigen Zugang 3 benachbarte Abschnitt dargestellt. Am nicht gezeigten, gegenüberliegenden Endbereich des Druckbehälters 1 befindet sich ein in üblicher Weise gestalteter gasseitiger Zugang zum Innenraum einer nur in ■.. Fig. 3 angedeuteten Speicherblase 5, die das bewegliche Trennelement bil- det, welches den in ihrem Innern befindlichen Gasraum 7 vom Fluidraum 9 trennt.In the drawing of FIG. 1, only the section adjacent to the fluid-side access 3 of the pressure vessel 1 is shown. At the opposite end region of the pressure vessel 1, not shown, there is a gas-side access to the interior of a storage bladder 5, which is only indicated in FIG. 3 and which forms the movable separating element. det, which separates the gas space 7 located in its interior from the fluid space 9.
Bei dem in Fig. 1 gezeigten Ausführungsbeispiel ist als fluidseitiger Zugang 3 ein Fluid-Anschlußstutzen 1 1 am benachbarten Ende des Fluidraumes 9 in die Wand des Druckbehälters 1 eingeschweißt. Der Anschlußstutzen 1 1 ist in Form einer kreiszylindrischen Hülse ausgebildet, die in dem an ihr freies, äußeres Ende anschließenden Abschnitt ein Innengewinde 13 für den Anschluß einer nicht gezeigten Fluidleitung aufweist. In dem dem Flui- draum 9 benachbarten Endbereich bildet der Anschlußstutzen 1 1 eine Kolbenbohrung 15, in der ein Schieberkolben 17 verschiebbar geführt ist. Der Anschlußstutzen 1 1 bildet somit das Ventilgehäuse für ein Schieberventil mit dem als beweglicher Ventilkörper dienenden Schieberkolben 1 7, der an der Innenfläche der Kolbenbohrung 15 des Anschlußstutzens 1 1 unmittel- bar für seine Bewegung entlang der Längsachse 19 der Kolbenbohrung 15 geführt und zwischen einer in Fig. 1 und 3 gezeigten Offenstellung und einer in Fig. 2 gezeigten Schließstellung bewegbar ist.In the embodiment shown in FIG. 1, a fluid connection stub 11 at the adjacent end of the fluid space 9 is welded into the wall of the pressure container 1 as the fluid-side access 3. The connecting piece 1 1 is designed in the form of a circular cylindrical sleeve which has an internal thread 13 in the section adjoining its free, outer end for the connection of a fluid line, not shown. In the end region adjacent to the fluid space 9, the connecting piece 11 forms a piston bore 15, in which a slide piston 17 is displaceably guided. The connection piece 1 1 thus forms the valve housing for a slide valve with the slide piston 1 7 serving as a movable valve body, which is guided on the inner surface of the piston bore 15 of the connection piece 1 1 directly for its movement along the longitudinal axis 19 of the piston bore 15 and between an in 1 and 3 and a closed position shown in Fig. 2 is movable.
Der Schieberkolben 17 ist durch eine Schrauben-Druckfeder 21 in die in Fig. 1 und 3 gezeigte Offenstellung vorgespannt. Aus dieser Stellung ist er bei einer entsprechenden Ausdehnung der Speicherblase 5, wenn diese gegen die Oberseite 23 des Speicherkolbens 17 drückt, gegen die Kraft der Druckfeder 21 in die in Fig. 2 gezeigte Schließstellung verschiebbar.The slide piston 17 is biased by a helical compression spring 21 into the open position shown in FIGS. 1 and 3. From this position, it can be moved against the force of the compression spring 21 into the closed position shown in FIG. 2 when the storage bladder 5 is correspondingly expanded when it presses against the upper side 23 of the storage piston 17.
Die Druckfeder 21 stützt sich mit ihrem vom Schieberkolben 17 abgewandten Ende an einer Abstützplatte 25 ab, die im Anschlußstutzen 1 1 an einem am benachbarten Ende der Kolbenbohrung 15 befindlichen Absatz anliegt : und bei dem Ausführungsbeispiel von Fig. 1 durch einen Sicherungsring 27 gehalten ist. Bei dem alternativen Beispiel von Fig. 2 ist die Abstützplatte 25 mittels eines flachen Sprengringes 29 gesichert. Abgesehen von dieser Unterschiedlichkeit entspricht das Ausführungsbeispiel von Fig. 2 demjenigen von Fig. 1.The compression spring 21 is supported with its end facing away from the spool 17 on a support plate 25 which rests in the connecting piece 11 on a shoulder located at the adjacent end of the piston bore 15 : and is held in the embodiment of FIG. 1 by a retaining ring 27. In the alternative example of FIG. 2, the support plate 25 secured by means of a flat snap ring 29. Apart from this difference, the embodiment of FIG. 2 corresponds to that of FIG. 1.
5 Die zwischen der Abstützplatte 25 und dem Schieberkolben 17 eingespannte Druckfeder 21 erstreckt sich in eine Axialbohrung 31 hinein, die im Schieberkolben 1 7, zu der Längsachse 19 konzentrisch, an dessen vom Fluidraum 9 abgewandten Ende ausgebildet ist und im Schieberkolben 1 7 in Querbohrungen 33 mündet. Diese Querbohrungen verlaufen in der Nä-5 The compression spring 21 clamped between the support plate 25 and the slide piston 17 extends into an axial bore 31, which is formed in the slide piston 1 7, concentrically with the longitudinal axis 19, at its end facing away from the fluid chamber 9 and in the slide piston 17 in transverse bores 33 empties. These cross holes run in the
10 he der Oberseite 23 des Schieberkolbens 17 radial und in rechtem Winkel zueinander, so daß sie sich auf der Längsachse 1 überschneiden. Diese Querbohrungen 33 bilden im Schieberkolben 1 7 Fluidkanäle, die mit der Ventil-Steuerkante zusammenwirken und die über die Axialbohrung 31 des Schieberkolbens 17 und Durchgangsbohrungen 35 in der Abstützplatte 2510 he the top 23 of the spool 17 radially and at right angles to each other so that they overlap on the longitudinal axis 1. These transverse bores 33 form 7 fluid channels in the slide piston 1, which cooperate with the valve control edge and which pass through the axial bore 31 of the slide piston 17 and through holes 35 in the support plate 25
15 den Fluidzugang zum Fluidraum 9 bilden, wenn sich das Schieberventil in der in Fig. 1 und 3 gezeigten Offenstellung befindet.15 form the fluid access to the fluid space 9 when the slide valve is in the open position shown in FIGS. 1 and 3.
Bei der in Fig. 2 gezeigten Stellung des Schieberkolbens 17 sind die Mündungen der Querbohrung 33 durch die am oberen Endrand 37 gebildeteIn the position of the slide piston 17 shown in FIG. 2, the orifices of the transverse bore 33 are formed by those at the upper end edge 37
20. Steuerkante des als Ventilgehäuse dienenden Anschlußstutzens 1 1 abgeschlossen, siehe Fig. 2. Wie aus dieser Figur entnehmbar ist, bildet die Kolbenbohrung 15 in ihrem Endabschnitt einen verjüngten Bohrungsabschnitt mit einer Ringschulterfläche 39, die in Zusammenwirkung mit einer am Schieberkolben 1 7 vorgesehenen Gegenschulterfläche 41 (siehe Fig. 2) ei-20. Control edge of the connecting piece 1 1 serving as the valve housing is closed, see FIG. 2. As can be seen from this figure, the piston bore 15 forms in its end section a tapered bore section with an annular shoulder surface 39, which in cooperation with a counter-shoulder surface provided on the slide piston 1 7 41 (see FIG. 2)
25 nen Anschlag bildet, der die Bewegung des Schieberkolbens 17 in Richtung auf den Fluidraum 9 hin begrenzt. Fig. 1 zeigt die entsprechende, durch diese Anschlageinrichtung festgelegte Stellung des Schieberkolbens 1 7. Bei beiden in Fig. 3 gezeigten Ausführungsbeispielen ist die als Widerlager für die Druckfeder 21 bildende Abstützplatte 25 mit einem Außengewinde versehen und in das in dem Anschlußstutzen 1 1 endseitig ausgebildete Innengewinde 13 eingeschraubt.25 forms a stop that limits the movement of the slide piston 17 in the direction of the fluid chamber 9. 1 shows the corresponding position of the slide piston 17 determined by this stop device. In both of the exemplary embodiments shown in FIG. 3, the support plate 25 which forms the abutment for the compression spring 21 is provided with an external thread and is screwed into the internal thread 13 formed at the end in the connecting piece 11.
Bei dem in Fig. 3 linksseitig gezeigten Ausführungsbeispiel weist der Anschlußstutzen 1 1 in dem dem Endrand 37 benachbarten Abschnitt ein Außengewinde 43 auf, das mit einem entsprechenden Innengewinde der Wand des Druckbehälters 1 verschraubt ist. Die Wandstärke des Druckbe- hälters 1 ist zu diesem Zweck im Gewindebereich größer ausgeformt.In the exemplary embodiment shown on the left in FIG. 3, the connecting piece 11 in the section adjacent to the end edge 37 has an external thread 43 which is screwed to a corresponding internal thread of the wall of the pressure vessel 1. For this purpose, the wall thickness of the pressure vessel 1 is made larger in the threaded area.
Das in Fig. 3 rechtsseitig gezeigte Ausführungsbeispiel weist einen an den Druckbehälter 1 einstückig durch Warm- oder Kaltformen angeformten Anschlußstutzen 1 1 auf und unterscheidet sich im übrigen nicht von dem in der gleichen Figur linksseitig dargestellten Beispiel.The exemplary embodiment shown on the right in FIG. 3 has a connecting piece 11 integrally formed on the pressure vessel 1 by hot or cold forming and does not differ from the example shown on the left in the same figure.
Vorstehend ist die Erfindung anhand von Ausführungsbeispielen in Form von Blasenspeichern beschrieben. Es versteht sich jedoch, daß die Erfindung mit Vorteil gleichermaßen bei Hydrospeichern anderer Bauart, bei- spielsweise bei Membranspeichern oder Kolbenspeichern, anwendbar ist. The invention has been described above using exemplary embodiments in the form of bladder memories. However, it goes without saying that the invention can equally advantageously be used in hydraulic accumulators of other types, for example in membrane accumulators or piston accumulators.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Hydrospeicher, insbesondere Blasenspeicher, mit einem Druckbehälter (1), einem in diesem angeordneten Trennelement (5), das im Druckbehälter (1) einen an einen gasseitigen Zugang angrenzenden Gasraum (7) von einem Fluidraum (9) trennt, der an einen fluidseitigen Zugang (3) angrenzt, welcher einen Fluid-Anschlußstutzen (1 1) aufweist, und mit einer am Anschlußstutzen (1 1 ) befindlichen Ventilanordnung mit einem mindestens eine Querbohrung (33) aufweisenden Ventilkörper (17), der normalerweise in seine den Fluiddurchgang freigebende Offenstellung vorgespannt und durch eine Bewegung des Trennelementes (5) in seine Schließstellung bewegbar ist, wobei die Innenfläche (1 5) des Anschlußstutzens (1 1 ) für den an ihr unmittelbar anliegenden Ventilkörper (1 7) die Führung für dessen Bewegung zwischen Offenstellung und Schließstellung bildet, dadurch gekennzeichnet, daß der Ventilkörper (17) an seiner dem Trennelement (5) zugewandten Seite als eben verlaufende Platte (17') ausgebildet ist, daß die jeweilige Querbohrung (33) von der Platte (1 7') begrenzt in der Offenstellung zumindest teilweise in den Fluidraum (9) mündet und daß der Durchmesser des Ventilkörpers (17) größer bemessen ist als seine Höhe gemessen in der Bewegungsrichtung des Ventil körpers (1 7).1. Hydraulic accumulator, in particular bladder accumulator, with a pressure vessel (1), a separating element (5) arranged in it, which separates a gas space (7) adjacent to a gas-side access from a fluid space (9) in the pressure vessel (1) adjacent fluid-side access (3), which has a fluid connection piece (1 1), and with a valve arrangement located on the connection piece (1 1) with a valve body (17) having at least one transverse bore (33), which normally releases the fluid passage into its body Biased open position and movable by a movement of the separating element (5) into its closed position, the inner surface (1 5) of the connecting piece (1 1) for the valve body (1 7) lying directly against it being the guide for its movement between the open position and the closed position forms, characterized in that the valve body (17) on its side facing the separating element (5) as a flat plate (17 ') au It is formed that the respective transverse bore (33) from the plate (17 ') delimits in the open position at least partially into the fluid space (9) and that the diameter of the valve body (17) is larger than its height measured in the direction of movement the valve body (1 7).
2. Hydrospeicher nach Anspruch 1 , dadurch gekennzeichnet, daß die Ven- tilanordnung in der Art eines Schieberventiles gestaltet ist und der als2. Hydraulic accumulator according to claim 1, characterized in that the valve arrangement is designed in the manner of a slide valve and as
Ventilgehäuse dienende Anschlußstutzen (1 1) mit seiner kreiszylindrischen Innenfläche die Kolbenbohrung (15) für den als Schieberkolben (17) ausgebildeten Ventilkörper definiert. Hydrospeicher nach Anspruch 2, dadurch gekennzeichnet, daß der Schieberkolben (17) zumindest eine quer zur Längsachse (19) der Kolbenbohrung (15) verlaufende Querbohrung (33) als mit dem Fluidraum (9) verbindbaren Fluidkanal sowie zumindest eine in Axialrichtung verlaufende, in die Querbohrung (33) mündende Axialbohrung (31) aufweist, die an der vom Fluidraum (9) abgewandten Seite des Schieberkolbens (1 ) offen ist, und daß der Endbereich des Anschlußstutzens (1 ), der an den Fluidraum (9) angrenzt, eine Steuerkante für das Freigeben und Verschließen der Mündung der Querbohrung (33) bildet..Valve housing serving connection piece (1 1) with its circular cylindrical inner surface defines the piston bore (15) for the valve body designed as a slide piston (17). Hydraulic accumulator according to claim 2, characterized in that the slide piston (17) has at least one transverse bore (33) extending transversely to the longitudinal axis (19) of the piston bore (15) as a fluid channel which can be connected to the fluid space (9) and at least one in the axial direction in which Has transverse bore (33) opening axial bore (31) which is open on the side of the slide piston (1) facing away from the fluid space (9) and that the end region of the connecting piece (1) which adjoins the fluid space (9) has a control edge for releasing and closing the mouth of the transverse bore (33).
4. Hydrospeicher nach Anspruch 3, gekennzeichnet durch eine in der Kol- , benbohrung (15) auf der vom Fluidraum (9) abgekehrten Seite des4. Hydraulic accumulator according to claim 3, characterized by a in the piston, ben bores (15) on the fluid chamber (9) facing away from the side
Schieberkolbens (17) verankerte, von zumindest einer Durchgangsbohrung (35) durchbrochene Abstützplatte (25), die als Widerlager für eine zwischen dieser und dem Schieberkolben (17) eingespannten Federanordnung (21 ) zur Erzeugung der den Schieberkolben (1 7) in die Offenstellung drängenden Vorspannkraft dient.Slide piston (17) anchored, at least one through-hole (35) perforated support plate (25), which as an abutment for a spring arrangement (21) clamped between the latter and the slide piston (17) to generate the slide piston (17) in the open position Preload serves.
5. Hydrospeicher nach einem der Ansprüche 2 bis 4, dadurch gekenn- zeichnet, daß Anzahl und Querschnittsgröße der im Schieberkolben5. Hydraulic accumulator according to one of claims 2 to 4, characterized in that the number and cross-sectional size of the in the spool
(1 7) in Axialrichtung und/oder in Querrichtung verlaufenden Bohrungen (31 , 33) im Hinblick auf eine gewünschte, sich beim Fluiddurchtritt ergebende Drosselung gewählt sind.(1 7) in the axial direction and / or in the transverse direction bores (31, 33) are selected with a view to a desired throttling resulting when the fluid passes.
6. Hydrospeicher nach den Ansprüchen 4 und 5, dadurch gekennzeichnet, daß die Federanordnung eine Schrauben-Druckfeder (21 ) aufweist und daß eine im Schieberkolben (17) zentral gelegene Axialbohrung (31 ) mit . ihrem in die zumindest eine Querbohrung (33) mündenden Endbereich als Widerlager für die zwischen Abstützplatte (25) und Schieberkolben (1 7) eingespannte, in die Axialbohrung (31 ) eingreifende Schrauben- Druckfeder (21) dient.6. Hydraulic accumulator according to claims 4 and 5, characterized in that the spring arrangement has a helical compression spring (21) and that in the slide piston (17) centrally located axial bore (31). its end region opening into the at least one transverse bore (33) as an abutment for the between the support plate (25) and the slide piston (1 7) clamped, in the axial bore (31) engaging helical compression spring (21) is used.
7. Hydrospeicher nach einem der Ansprüche 2 bis 6, dadurch gekenn- zeichnet, daß die Kolbenbohrung (15) an ihrem dem Fluidraum (9) benachbarten Endbereich (37) einen verjüngten Bohrungsabschnitt zur Bildung einer Ringschulterfläche (39) bildet, die in Zusammenwirkung mit einer am Schieberkolben (17) radial vorspringenden Gegenschulterfläche (41 ) einen Anschlag bildet, an dem der Schieberkolben (1 7) in der Offenstellung unter dem Einfluß der an ihm wirkenden Vorspannkraft anliegt.7. Hydraulic accumulator according to one of claims 2 to 6, characterized in that the piston bore (15) at its fluid region (9) adjacent end region (37) forms a tapered bore section to form an annular shoulder surface (39) which in cooperation with a counter shoulder surface (41) projecting radially on the slide piston (17) forms a stop against which the slide piston (17) bears in the open position under the influence of the prestressing force acting on it.
8. Hydrospeicher nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß der Schieberkolben (1 7) in der Nähe seines dem Flui- draum (9) zugewandten Endes zwei zueinander im rechten Winkel durchgehend verlaufende Querbohrungen (33) aufweist, die sich auf der zentralen Längsachse (19) des Schieberkolbens (17) überschneiden.8. Hydraulic accumulator according to one of claims 2 to 7, characterized in that the slide piston (1 7) in the vicinity of its end facing the fluid space (9) has two mutually continuous transverse bores (33) which extend at right angles to one another overlap the central longitudinal axis (19) of the slide piston (17).
9. Hydrospeicher nach einem der Ansprüche 1 bis 8, dadurch gekenn- zeichnet, daß der Anschlußstutzen (1 1) in eine endseitige Öffnung des9. Hydraulic accumulator according to one of claims 1 to 8, characterized in that the connecting piece (1 1) in an end opening of the
Druckbehälters (1) eingeschweißt ist.Pressure vessel (1) is welded in.
10. Hydrospeicher nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Anschlußstutzen (1 1 ) an einem Ende des Druckbehäl- ters (1) durch Warm- oder Kaltumformen einstückig an diesen angeformt ist.10. Hydraulic accumulator according to one of claims 1 to 8, characterized in that the connecting piece (1 1) at one end of the pressure vessel (1) is integrally formed on it by hot or cold forming.
1 1 . Hydrospeicher nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Anschlußstutzen (1 1) in seinem dem Fluidraum (9) zugewandten Abschnitt ein Außengewinde (43) aufweist und mit einem Innengewinde in der zugeordneten, endseitigen Öffnung des Druckbehälters (1) verschraubt ist.1 1. Hydraulic accumulator according to one of claims 1 to 8, characterized in that the connecting piece (1 1) in its the fluid space (9) facing section has an external thread (43) and is screwed to an internal thread in the associated end opening of the pressure vessel (1).
12. Hydrospeicher nach Anspruch 4 und einem der übrigen Ansprüche 1 bis 1 1 , dadurch gekennzeichnet, daß der Anschlußstutzen (1 1 ) in dem sich an die Kolbenbohrung (1 5) auf der vom Fluidraum abgewandten Seite anschließenden Abschnitt ein Innengewinde (13) aufweist, in das die mit Außengewinde versehene Abstützplatte (25) ein geschraubt ist. 12. Hydraulic accumulator according to claim 4 and one of the other claims 1 to 1 1, characterized in that the connecting piece (1 1) in the piston bore (1 5) on the side facing away from the fluid space adjoining section has an internal thread (13) , into which the support plate (25) provided with an external thread is screwed.
EP01987851A 2000-10-18 2001-10-12 Hydroaccumulator, in particular a bladder accumulator Expired - Lifetime EP1327081B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10051580 2000-10-18
DE10051580A DE10051580A1 (en) 2000-10-18 2000-10-18 Hydraulic accumulators, especially bladder accumulators
PCT/EP2001/011838 WO2002033266A2 (en) 2000-10-18 2001-10-12 Hydroaccumulator, in particular a bladder accumulator

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EP1327081A2 true EP1327081A2 (en) 2003-07-16
EP1327081B1 EP1327081B1 (en) 2005-05-25

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EP (1) EP1327081B1 (en)
JP (1) JP4170754B2 (en)
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DE10305310B4 (en) * 2003-02-10 2005-11-24 Robert Bosch Gmbh Device for damping pressure pulsations
DE10350941A1 (en) * 2003-10-31 2005-06-02 Hydac Technology Gmbh Device for damping pressure surges
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DE102014209682A1 (en) * 2014-05-21 2015-11-26 Robert Bosch Gmbh damping device
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EP1327081B1 (en) 2005-05-25
WO2002033266A3 (en) 2002-08-29
US6988514B2 (en) 2006-01-24
US20040020543A1 (en) 2004-02-05
WO2002033266A2 (en) 2002-04-25
DE50106341D1 (en) 2005-06-30
JP4170754B2 (en) 2008-10-22
JP2004514094A (en) 2004-05-13

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