EP1327081B1 - Hydroaccumulator, in particular a bladder accumulator - Google Patents
Hydroaccumulator, in particular a bladder accumulator Download PDFInfo
- Publication number
- EP1327081B1 EP1327081B1 EP01987851A EP01987851A EP1327081B1 EP 1327081 B1 EP1327081 B1 EP 1327081B1 EP 01987851 A EP01987851 A EP 01987851A EP 01987851 A EP01987851 A EP 01987851A EP 1327081 B1 EP1327081 B1 EP 1327081B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bore
- fluid
- piston
- store according
- valve
- 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
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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
- F15B1/16—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
- the invention relates to a hydraulic accumulator, in particular bladder accumulator with the features the preamble of claim 1.
- Hydraulic accumulators of this type are commercially available.
- a bladder memory of the above type shown and described In the known bladder accumulator is the valve assembly designed as a seat valve, wherein on the fluid space facing End edge of the connecting piece as a fixed valve seat a conical surface is formed, which with a corresponding conical surface on a Valve plate of the movable valve body cooperates.
- This is similar designed as the usual in valve-controlled internal combustion engines Control valves, i. the valve disk is located on a shaft which is suitable for the between the open position and closed position extending valve lift is guided in a valve guide, which is installed in the connection piece is.
- a generic hydraulic accumulator whose separating element is formed from a metal bellows. Within the bellows is a compression spring arranged, which is the separating element held in the prestressed state. On the bottom is the metal bellows provided with a closure plate which cooperates with a valve body, the spring-loaded in the fluid connection of the Housing of the known hydraulic accumulator is added.
- the valve body is designed as a valve tappet and larger in its longitudinal orientation dimensioned as in the transverse direction, so that the known valve body in his Movement direction in the connecting piece takes up much space.
- the with the end plate cooperating end of the valve body is dome-like trained, so that in connection with the different Diameters, grooves and punctures, bevelled surfaces and a Transverse bore at the other end of the valve body a complex geometry arises, which is a complex and costly machining process required in the production.
- the complicated constructive geometric Structure of the closing body is also continued in the fluid guide and due to the multiple deflection of the fluid flow is in particular in the Area of inflow of the medium into the fluid space unfavorable Realized flow, so that the known solution for hydraulic accumulator with sensitive membrane bubbles proves to be unsuitable.
- US-A-4,068,684 discloses a generic hydraulic accumulator, wherein in the known solution of the spring-loaded valve body as a sleeve-like Closure is formed, the height measured in the direction of movement of the valve body is sized several times greater than its Diameter.
- the valve body is at his, the Separating element facing side formed as a flat plate and has in its sleeve-like outer shell diametrically opposite each other Cross holes on the fluid side of the hydraulic accumulator are fluidly connected in the open position of the valve.
- the known valve body solution thus builds in the axial direction of the hydraulic accumulator very large and due to the fluid-carrying cross bores results in the area of the inflow of the medium into the fluid space non-throttling and thus unfavorable flow pattern.
- the Invention the task of the known generic hydraulic accumulator further to improve so that the valve body takes up little space, that it is geometrically simple and therefore inexpensive to implement is, as well as an optimized flow path in the region of the inflow into the fluid space permits.
- This task is solved by a hydraulic accumulator with the features of claim 1 in its entirety.
- the diameter of the valve body is sized larger than its height measured in the direction of movement of the valve body and that the respective Transverse bore in the valve piston is designed as a fluid channel, the radial and at right angles to each other running continuously in the spool overlap on the longitudinal axis, on the one hand, the valve assembly built in the manner of a plate valve, which takes up little space and can be realized inexpensively and on the other hand allows the respective fluid channel, which is integrated into the interior of the valve body, a targeted control of the fluid flow and the fluid channels can from their number and cross-sectional size are chosen so that at Fluid passage gives a desired throttling, with the possibility during operation of the hydraulic accumulator depending on the intended use of the to specify optimal damping ratios for each.
- valve assembly is designed in the manner of a slide valve and serving as a valve housing Connecting piece with its circular cylindrical inner surface the piston bore defined for the trained as a spool valve body.
- the arrangement may be such that adjacent to the fluid space end edge of the piston bore of the Connecting piece the control edge for releasing and closing a or more fluid channels of the spool forms.
- the spool piston leading to the piston preferably can its end portion adjacent to the fluid space has a tapered bore portion by which an annular shoulder surface is formed, in cooperation with a radially projecting on the spool Counter shoulder surface forms a stop on which the spool in the open position of the valve is applied.
- FIG. 1 In the drawing of Fig. 1, only the fluid side of the pressure vessel 1 Access 3 adjacent section shown. Not shown, opposite End of the pressure vessel 1 is located in usually designed gas-side access to the interior of a only in Fig. 3 indicated memory bladder 5, which forms the movable separating element, which is the gas space 7 located in its interior from the fluid space 9 separates.
- a fluid connecting piece 11 at the adjacent end of the fluid space. 9 welded into the wall of the pressure vessel 1.
- the connection piece 11 is in the form of a circular cylindrical sleeve, in which at her free, outer end adjoining section an internal thread 13 for the Having connection of a fluid line, not shown.
- an internal thread 13 for the Having connection of a fluid line, not shown.
- adjacent end portion of the connecting piece 11 forms a piston bore 15, in which a spool 17 is slidably guided.
- Connecting piece 11 thus forms the valve housing for a slide valve with serving as a movable valve body spool 17, the inner surface of the piston bore 15 of the connecting piece 11 directly for its movement along the longitudinal axis 19 of the piston bore 15th guided and between an open position shown in FIGS. 1 and 3 and a closed position shown in Fig. 2 is movable.
- the spool 17 is by a helical compression spring 21 in the in Fig. 1 and 3 shown biased open position. He is from this position at a corresponding extent of the storage bubble 5, if this against the top 23 of the accumulator piston 17 presses, against the force of Compression spring 21 in the closed position shown in FIG. 2 displaceable.
- the compression spring 21 is supported with its remote from the spool 17 End of a support plate 25 from the connecting piece 11 at a located at the adjacent end of the piston bore 15 located paragraph and in the embodiment of Fig. 1 by a locking ring 27th is held.
- the support plate 25 is secured by a flat snap ring 29. Apart from this difference corresponds to the embodiment of Fig. 2 that of Fig. 1.
- Compression spring 21 extends into an axial bore 31, which in the Spool 17, to the longitudinal axis 19 concentric, at the vom Fluid space 9 facing away from the end is formed and in the spool 17 in transverse bores 33 opens.
- These cross holes are nearby the top 23 of the spool 17 radially and at right angles to each other, so that they overlap on the longitudinal axis 19.
- These Transverse holes 33 form in the spool 17 fluid channels, with the Valve control edge cooperate and the over the Akialbohrung 31 of the Spool 17 and through holes 35 in the support plate 25th form the fluid access to the fluid space 9 when the slide valve in the open position shown in Fig. 1 and 3 is located.
- the connecting piece 11 in the end edge 37 adjacent portion an external thread 43, which with a corresponding internal thread of the Wall of the pressure vessel 1 is screwed.
- the wall thickness of the pressure vessel 1 is formed larger for this purpose in the threaded area.
- the embodiment shown in Fig. 3 on the right side has a to the Pressure vessel 1 integrally formed by hot or cold forming connecting piece 11 and does not differ from the rest in the same figure on the left side shown example.
- the invention is based on embodiments in the form described by bubble stores. It is understood, however, that the invention with advantage alike in Hydrospeichem other design, for example with membrane accumulators or Koiben appointmentn, is applicable.
Description
Die Erfindung bezieht sich auf einen Hydrospeicher, insbesondere Blasenspeicher mit den Merkmalen des Oberbegriffes des Patentanspruches 1.The invention relates to a hydraulic accumulator, in particular bladder accumulator with the features the preamble of claim 1.
Hydrospeicher dieser Art sind handelsüblich. In einem von der Firma Mannesmann Rexroth GmbH herausgegebenen Fachbuch "Der Hydraulik Trainer Band 1" 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 Kegelfläche 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 Ventilhubbewegung in einer Ventilführung geführt ist, die in den Anschlußstutzen eingebaut ist.Hydraulic accumulators of this type are commercially available. In one of the company Mannesmann Rexroth GmbH edited book "The hydraulics Trainer Volume 1 "is on page 165 a bladder memory of the above type shown and described. In the known bladder accumulator is the valve assembly designed as a seat valve, wherein on the fluid space facing End edge of the connecting piece as a fixed valve seat a conical surface is formed, which with a corresponding conical surface on a Valve plate of the movable valve body cooperates. This is similar designed as the usual in valve-controlled internal combustion engines Control valves, i. the valve disk is located on a shaft which is suitable for the between the open position and closed position extending valve lift is guided in a valve guide, which is installed in the connection piece is.
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 Ferti-: gungstoleranzen, sowohl bezüglich der Fluchtung als auch der Passung, sorgfältig gestaltet sein. Außerdem ist eine entsprechende Bearbeitung der den Ventilsitz bildenden Kegelflächen erforderlich.The disadvantage here is the resulting high production costs due the required effort for production and processing of Due to this valve design variety of items: To a To ensure proper operation of the valve assembly, the in the connecting piece built-in valve guide with regard to the production: tolerances, both in terms of alignment and fit, be carefully designed. In addition, a corresponding processing of The valve seat forming conical surfaces required.
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 kostenintensiven 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.By PCT / WO 00/31420 a generic hydraulic accumulator is known whose separating element is formed from a metal bellows. Within the bellows is a compression spring arranged, which is the separating element held in the prestressed state. On the bottom is the metal bellows provided with a closure plate which cooperates with a valve body, the spring-loaded in the fluid connection of the Housing of the known hydraulic accumulator is added. The valve body is designed as a valve tappet and larger in its longitudinal orientation dimensioned as in the transverse direction, so that the known valve body in his Movement direction in the connecting piece takes up much space. The with the end plate cooperating end of the valve body is dome-like trained, so that in connection with the different Diameters, grooves and punctures, bevelled surfaces and a Transverse bore at the other end of the valve body a complex geometry arises, which is a complex and costly machining process required in the production. The complicated constructive geometric Structure of the closing body is also continued in the fluid guide and due to the multiple deflection of the fluid flow is in particular in the Area of inflow of the medium into the fluid space unfavorable Realized flow, so that the known solution for hydraulic accumulator with sensitive membrane bubbles proves to be unsuitable.
Durch die US-A-4,068,684 ist ein gattungsgemäßer Hydrospeicher bekannt, wobei bei der bekannten Lösung der federbelastete Ventilkörper als hülsenartiger Verschlußstutzen ausgebildet ist, dessen Höhe gemessen in der Bewegungsrichtung des Ventilkörpers mehrfach größer bemessen ist, als sein Durchmesser. Bei der bekannten Lösung ist der Ventilkörper an seiner, dem Trennelement zugewandten Seite als eben verlaufende Platte ausgebildet und weist in seinem hülsenartigen Außenmantel diametral einander gegenüberliegende Querbohrungen auf, die mit der Fluidseite des Hydrospeichers in der Offenstellung des Ventiles fluidführend verbunden sind. Die bekannte Ventilkörperlösung baut demgemäß in Axialrichtung des Hydrospeichers sehr groß auf und aufgrund der fluidführenden Querbohrungen ergibt sich im Bereich der Einströmung des Mediums in den Fluidraum ein nicht drosselbarer und mithin ungünstiger Strömungsverlauf.US-A-4,068,684 discloses a generic hydraulic accumulator, wherein in the known solution of the spring-loaded valve body as a sleeve-like Closure is formed, the height measured in the direction of movement of the valve body is sized several times greater than its Diameter. In the known solution, the valve body is at his, the Separating element facing side formed as a flat plate and has in its sleeve-like outer shell diametrically opposite each other Cross holes on the fluid side of the hydraulic accumulator are fluidly connected in the open position of the valve. The known valve body solution thus builds in the axial direction of the hydraulic accumulator very large and due to the fluid-carrying cross bores results in the area of the inflow of the medium into the fluid space non-throttling and thus unfavorable flow pattern.
Ausgehend von diesem nächstkommenden Stand der Technik stellt sich die Erfindung die Aufgabe, den bekannten gattungsgemäßen 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 state of the art, the Invention the task of the known generic hydraulic accumulator further to improve so that the valve body takes up little space, that it is geometrically simple and therefore inexpensive to implement is, as well as an optimized flow path in the region of the inflow into the fluid space permits. This task 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 Durchmesser des Ventilkörpers größer bemessen ist als seine Höhe gemessen in der Bewegungsrichtung des Ventilkörpers und daß die jeweilige Querbohrung im Ventilkolben als Fluidkanal ausgebildet ist, die radial und in rechtem Winkel zueinander durchgehend im Schieberkolben verlaufend sich auf der Längsachse überschneiden, ist zum einen die Ventilanordnung in der Art eines Plattenventiles aufgebaut, welches wenig Bauraum einnimmt und sich kostengünstig realisieren läßt und zum andem erlaubt der jeweilige Fluidkanal, der in das Innere des Ventilkörpers integriert ist, eine gezielte Ansteuerung des Fluidstromes und die Fluidkanäle können von ihrer Anzahl und Querschnittsgröße her so gewählt werden, daß sich beim Fluiddurchtritt eine gewünschte Drosselung ergibt, mit der Möglichkeit beim Betrieb des Hydrospeichers je nach vorgesehenem Einsatzzweck die hierfür jeweils optimalen Dämpfungsverhältnisse vorzugeben.Characterized in that according to the characterizing part of claim 1 the diameter of the valve body is sized larger than its height measured in the direction of movement of the valve body and that the respective Transverse bore in the valve piston is designed as a fluid channel, the radial and at right angles to each other running continuously in the spool overlap on the longitudinal axis, on the one hand, the valve assembly built in the manner of a plate valve, which takes up little space and can be realized inexpensively and on the other hand allows the respective fluid channel, which is integrated into the interior of the valve body, a targeted control of the fluid flow and the fluid channels can from their number and cross-sectional size are chosen so that at Fluid passage gives a desired throttling, with the possibility during operation of the hydraulic accumulator depending on the intended use of the to specify optimal damping ratios for each.
Durch die Integrierung der Fluidkanäle in das Innere des Ventilkörpers ist darüber hinaus eine aufwendige Bearbeitung für eine differenzierte Formgebung der Außenfläche des Ventilkörpers, wie bei den bekannten Lösungen unnötig. Darüber hinaus ist mittels den jeweiligen Fluidkanälen 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. By the integration of the fluid channels in the interior of the valve body is In addition, a complex processing for a differentiated design the outer surface of the valve body, as in the known solutions unnecessary. In addition, by means of the respective fluid channels a ensures homogeneous outflow behavior of the fluid into the fluid space, so that in particular in the realization of a bladder memory opposite Pressure peaks sensitive separating membrane, usually from a rubber-elastic material is gently flowing around what leads to increase 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 when the valve assembly is designed in the manner of a slide valve and serving as a valve housing Connecting piece with its circular cylindrical inner surface the piston bore defined for the trained as a spool valve body.
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 embodiments, the arrangement may be such that adjacent to the fluid space end edge of the piston bore of the Connecting piece the control edge for releasing and closing a or more fluid channels of the spool forms.
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 vorspringenden Gegenschulterfläche einen Anschlag bildet, an dem der Schieberkolben in der Offenstellung des Ventils anliegt.The spool piston leading to the piston preferably can its end portion adjacent to the fluid space has a tapered bore portion by which an annular shoulder surface is formed, in cooperation with a radially projecting on the spool Counter shoulder surface forms a stop on which the spool in the open position of the valve is applied.
Nachstehend ist die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen im einzelnen erläutert.Below, the invention with reference to shown in the drawing Embodiments explained in detail.
Es zeigen:
- Fig. 1
- einen abgebrochenen Längsschnitt eines Ausführungsbeispieles 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;
- 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, und
- 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.
- Fig. 1
- a broken longitudinal section of an embodiment of a bladder accumulator according to the invention, wherein only the fluid-side connecting piece adjacent part of the memory with the connecting piece associated valve assembly, which is located in the open position shown;
- Fig. 2
- a longitudinal section shown only on the fluid connecting piece of a second embodiment, in a much larger scale compared to Figure 1, wherein the valve assembly is shown in the closed position, and
- Fig. 3
- 1 similar section, wherein on the left side and the right side, a third embodiment and fourth embodiment are shown and the valve assembly is shown in each case 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 bildet,
welches den in ihrem Innern befindlichen Gasraum 7 vom Fluidraum 9
trennt.In the drawing of Fig. 1, only the fluid side of the pressure vessel 1
Bei dem in Fig. 1 gezeigten Ausführungsbeispiel ist als fluidseitiger Zugang
3 ein Fluid-Anschlußstutzen 11 am benachbarten Ende des Fluidraumes 9
in die Wand des Druckbehälters 1 eingeschweißt. Der Anschlußstutzen 11
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 Fluidraum
9 benachbarten Endbereich bildet der Anschlußstutzen 11 eine Kolbenbohrung
15, in der ein Schieberkolben 17 verschiebbar geführt ist. Der
Anschlußstutzen 11 bildet somit das Ventilgehäuse für ein Schieberventil
mit dem als beweglicher Ventilkörper dienenden Schieberkolben 17, der an
der Innenfläche der Kolbenbohrung 15 des Anschlußstutzens 11 unmittelbar
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 is as a fluid-side access
3 a
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
Die Druckfeder 21 stützt sich mit ihrem vom Schieberkolben 17 abgewandten
Ende an einer Abstützplatte 25 ab, die im Anschlußstutzen 11 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
Die zwischen der Abstützplatte 25 und dem Schieberkolben 17 eingespannte
Druckfeder 21 erstreckt sich in eine Axialbohrung 31 hinein, die im
Schieberkolben 17, zu der Längsachse 19 konzentrisch, an dessen vom
Fluidraum 9 abgewandten Ende ausgebildet ist und im Schieberkolben 17
in Querbohrungen 33 mündet. Diese Querbohrungen verlaufen in der Nähe
der Oberseite 23 des Schieberkolbens 17 radial und in rechtem Winkel
zueinander, so daß sie sich auf der Längsachse 19 überschneiden. Diese
Querbohrungen 33 bilden im Schieberkolben 17 Fluidkanäle, die mit der
Ventil-Steuerkante zusammenwirken und die über die Akialbohrung 31 des
Schieberkolbens 17 und Durchgangsbohrungen 35 in der Abstützplatte 25
den Fluidzugang zum Fluidraum 9 bilden, wenn sich das Schieberventil in
der in Fig. 1 und 3 gezeigten Offenstellung befindet.The clamped between the
Bei der in Fig. 2 gezeigten Stellung des Schieberkolbens 17 sind die Mündungen
der Querbohrung 33 durch die am oberen Endrand 37 gebildete
Steuerkante des als Ventilgehäuse dienenden Anschlußstutzens 11 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 17 vorgesehenen Gegenschulterfläche 41 (siehe Fig. 2) einen
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 17. In the position of the
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 11 endseitig ausgebildete Innengewinde
13 eingeschraubt.In both embodiments shown in Fig. 3 is as an abutment
for the
Bei dem in Fig. 3 linksseitig gezeigten Ausführungsbeispiel weist der Anschlußstutzen
11 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 Druckbehälters
1 ist zu diesem Zweck im Gewindebereich größer ausgeformt.In the embodiment shown on the left in Fig. 3, the connecting
Das in Fig. 3 rechtsseitig gezeigte Ausführungsbeispiel weist einen an den
Druckbehälter 1 einstöckig durch Warm- oder Kaltformen angeformten Anschlußstutzen
11 auf und unterscheidet sich im übrigen nicht von dem in
der gleichen Figur linksseitig dargestellten Beispiel.The embodiment shown in Fig. 3 on the right side has a to the
Pressure vessel 1 integrally formed by hot or cold forming connecting
Vorstehend ist die Erfindung anhand von Ausführungsbeispielen in Form von Blasenspeichern beschrieben. Es versteht sich jedoch, daß die Erfindung mit Vorteil gleichermaßen bei Hydrospeichem anderer Bauart, beispielsweise bei Membranspeichern oder Koibenspeichern, anwendbar ist.Above, the invention is based on embodiments in the form described by bubble stores. It is understood, however, that the invention with advantage alike in Hydrospeichem other design, for example with membrane accumulators or Koibenspeichern, is applicable.
Claims (12)
- Hydro store, especially a bladder store, with a pressure vessel (1), a separation element (5) located within the same, which separates a gas chamber (7) adjacent to an inlet on the gas side from a fluid chamber (9) positioned adjacent to an inlet (3) on the fluid side within the pressure vessel (1), which incorporates a fluid connection piece (11), and with a valve arrangement with a valve body (17) incorporating at least one cross bore (33) located at the connection piece (11), which is normally biased towards the open position releasing the fluid passage, moveable by means of a movement of the separation element (5) along a longitudinal axis (19) of the store into its closed position, whereby the internal surface (15) of the connection piece (11) forms the guide for movement of the directly adjacent valve body (17) between the open position and the closed position, whereby the valve body (17) is formed as a planar plate (17') on its side that faces the separation element (5), whereby the relevant cross bore (33) is limited by the plate (17') in the open position and opens at least in part into the fluid chamber (9), and whereby an axial bore (31) that is open on the side of the valve body (17) that faces away from the fluid chamber (9) opens into the relevant cross bore (33), characterised in that the diameter of the valve body (17) is larger than its height measured in movement direction of the valve body (17), and in that the relevant cross bore (33) is formed as a fluid channel within the valve piston (17), crossing radially and continuously within the displacement piston (17) and crossing each other upon the longitudinal axis (19).
- Hydro store according to Claim 1, characterised in that the valve arrangement is realised in the form of a damper valve, and in that the connection piece (11) serving as valve housing defines the piston bore (15) for the valve body representing the displacement piston (17) with its circular cylindrical internal surface.
- Hydro store according to Claim 2, characterised in that the end section of the connection piece (11) positioned adjacent to the fluid chamber (9) forms a controlling edge for releasing and closing the opening of the cross bore (33).
- Hydro store according to Claim 3, characterised by a support plate (25) anchored within the piston bore (15) on the side of the displacement piston (17) facing away from the fluid chamber (9) and perforated by at least one passage bore (35) serving as a counter bearing for a spring arrangement (21) positioned between this and the displacement piston (17) for the creation of the biasing force required to force the displacement piston (17) into the open position.
- Hydro store according to one of the preceding Claims 2 to 4, characterised in that number and size of the cross-sectional size of the bores (31, 33) extending in an axial direction and/or in a transverse direction within the displacement piston (17) are chosen in relation to a desired throttling action resulting from the fluid flow.
- Hydro store according to Claims 4 and 5, characterised in that the spring arrangement incorporates a pressure spring screw (21), and in that an axial bore (31) positioned centrally within the displacement piston (17) serves as a counter bearing for the pressure spring screw (21) engaging the axial bore (31) and positioned between support plate (25) and displacement piston (17) with its end section that opens into the at least one cross bore (33).
- Hydro store according to one of the preceding Claims 2 to 6, characterised in that the piston bore (15) forms a tapered bore section for the formation of an annular shoulder surface (39) at its end section (37) adjacent to the fluid chamber (9), which forms an abutment in co-operation with a counter shoulder surface (41) projecting radially at the displacement piston (17), against which the displacement piston (17) abuts in the open position under the influence of the biasing force applied to the same.
- Hydro store according to one of the Claims 1 to 7, characterised in that the cross bores (33) continuously extending through the displacement piston (17) cross each other at right angles on the central longitudinal axis (19).
- Hydro store according to one of the Claims 1 to 8, characterised in that the connection piece (11) is welded into an end opening of the pressure vessel (1).
- Hydro store according to one of the Claims 1 to 8, characterised in that the connection piece (11) is formed integrally by means of hot or cold forming at one end of the pressure vessel (1).
- Hydro store according to one of the Claims 1 to 8, characterised in that the connection piece (11) incorporates an external thread (43) on its section that faces towards the fluid chamber (9), and in that the same is screwed into an internal thread within the associated end side opening of the pressure vessel (1).
- Hydro store according to Claim 4 and one of the other Claims 1 to 11, characterised in that the connection piece (11) incorporates an internal thread (13) on the side adjacent to the piston bore (15) that faces away from the fluid chamber, into which the support plate (25), equipped with an external thread, is screwed.
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 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1327081A2 EP1327081A2 (en) | 2003-07-16 |
EP1327081B1 true EP1327081B1 (en) | 2005-05-25 |
Family
ID=7660181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01987851A Expired - Lifetime EP1327081B1 (en) | 2000-10-18 | 2001-10-12 | Hydroaccumulator, in particular a bladder accumulator |
Country Status (5)
Country | Link |
---|---|
US (1) | US6988514B2 (en) |
EP (1) | EP1327081B1 (en) |
JP (1) | JP4170754B2 (en) |
DE (2) | DE10051580A1 (en) |
WO (1) | WO2002033266A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10247688A1 (en) * | 2002-04-26 | 2003-11-06 | Continental Teves Ag & Co Ohg | High pressure spring storage unit for storing pressure in a machine has a housing whose inner area has a separating unit in a pressure chamber |
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 |
US20080189925A1 (en) * | 2005-08-23 | 2008-08-14 | Taho Valves Corporation | Method for making water buffer device |
DE102014209682A1 (en) * | 2014-05-21 | 2015-11-26 | Robert Bosch Gmbh | damping device |
US20160033051A1 (en) * | 2014-07-31 | 2016-02-04 | Parker-Hannifin Corporation | Shutoff valve assembly |
US11885454B2 (en) * | 2019-12-27 | 2024-01-30 | Performance Pulsation Control, Inc. | Bladder saver device |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE23333E (en) * | 1951-01-23 | Storage device | ||
USRE23437E (en) * | 1951-12-04 | Oleopneumatic device | ||
US2331921A (en) * | 1938-05-31 | 1943-10-19 | Mercier Jean | Storage device |
US2345124A (en) * | 1941-12-01 | 1944-03-28 | New York Air Brake Co | Accumulator |
US2731038A (en) * | 1953-01-26 | 1956-01-17 | Purcell Howard Milne | Hydraulic accumulator |
US3038501A (en) * | 1957-12-05 | 1962-06-12 | Greer Hydraulies Inc | Pressure vessel |
FR79885E (en) * | 1961-05-31 | 1963-02-08 | Improvements to pressurized fluid separators | |
DE2452882A1 (en) * | 1974-11-07 | 1976-05-13 | Sugimura | Cylindrical accumulator with horizontal vessel - has bellows connected to vessel aperture, and expansion rings |
US4068684A (en) * | 1975-08-11 | 1978-01-17 | Greer Edward M | Locking ring assembly for the liquid port of a pressure accumulator |
DE2634945A1 (en) * | 1976-08-04 | 1978-02-09 | Bosch Gmbh Robert | VALVE FOR A PRESSURE ACCUMULATOR |
US4136714A (en) * | 1976-12-27 | 1979-01-30 | Creavco, Inc. | Accumulator drain closure |
US4509557A (en) * | 1983-07-08 | 1985-04-09 | Nobuyuki Sugimura | Accumulator |
US5368073A (en) * | 1993-10-07 | 1994-11-29 | Essef Corporation | Hydropneumatic pressure vessel having an improved diaphragm assembly |
WO2000031420A1 (en) * | 1998-11-25 | 2000-06-02 | Continental Teves Ag & Co. Ohg | Pressure means storage device |
US6460571B1 (en) * | 2001-03-13 | 2002-10-08 | Parker-Hannifin Corporation | Crimped piston/membrane accumulator |
-
2000
- 2000-10-18 DE DE10051580A patent/DE10051580A1/en not_active Withdrawn
-
2001
- 2001-10-12 EP EP01987851A patent/EP1327081B1/en not_active Expired - Lifetime
- 2001-10-12 WO PCT/EP2001/011838 patent/WO2002033266A2/en active IP Right Grant
- 2001-10-12 JP JP2002536221A patent/JP4170754B2/en not_active Expired - Lifetime
- 2001-10-12 DE DE50106341T patent/DE50106341D1/en not_active Expired - Lifetime
- 2001-10-12 US US10/399,445 patent/US6988514B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE10051580A1 (en) | 2002-05-08 |
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 |
EP1327081A2 (en) | 2003-07-16 |
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