EP2773874B1 - Hydraulic accumulator in form of a bellows accumulator - Google Patents

Hydraulic accumulator in form of a bellows accumulator Download PDF

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Publication number
EP2773874B1
EP2773874B1 EP12786824.8A EP12786824A EP2773874B1 EP 2773874 B1 EP2773874 B1 EP 2773874B1 EP 12786824 A EP12786824 A EP 12786824A EP 2773874 B1 EP2773874 B1 EP 2773874B1
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EP
European Patent Office
Prior art keywords
bellows
housing
accumulator
pot
end part
Prior art date
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Active
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EP12786824.8A
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German (de)
French (fr)
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EP2773874A1 (en
Inventor
Norbert Weber
Herbert Baltes
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Hydac Technology GmbH
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Hydac Technology GmbH
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Priority to EP18195927.1A priority Critical patent/EP3453891B1/en
Publication of EP2773874A1 publication Critical patent/EP2773874A1/en
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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
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/103—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means the separating means being bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3156—Accumulator separating means having flexible separating means characterised by their attachment
    • 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

Definitions

  • the invention relates to a hydraulic accumulator having the features in the preamble of claim 1.
  • Hydraulic accumulator with serving as a movable separator bellows are known and find application in various technical fields, for example in hydraulic brake systems for vehicles and various industrial hydraulic systems.
  • the DE 10 2008 061 221 A1 shows, for example, a bellows, in which a metal bellows is provided as a movable separating element between the gas side and the fluid side.
  • Bellows storage are characterized by several advantageous properties.
  • relatively large changes in volume of the media spaces located in the storage enclosure can be realized.
  • metal bellows relative to the alternating loads, as they can occur during operation, in particular when used as a pulsation damper, relatively robust and have good sealing properties without diffusion losses.
  • metal bellows which are suitable for use in hydraulic accumulators, are proportionate are expensive components, so that the production of Belg Grande is relatively expensive.
  • the DE 102 53 012 A1 discloses a hydraulic accumulator in the form of a bellows accumulator, comprising a storage housing in which the predetermined number of bellows bellows forms a movable separator between the gas side and fluid side, wherein a spacer means is provided, which is arranged within the storage housing and to form an additional media space with the interior the bladder is in fluid communication and adjacent to the bellows, the distancing means being in the form of a pot which is attached with its opening to an open end of the bellows with fluid tight connection.
  • a gas chamber is formed by a cylindrical recess of a piston and by the space between the piston and bellows.
  • the object of the invention is to provide a bellows accumulator which can be produced efficiently and inexpensively. According to the invention, this object is achieved by a bellows memory having the features of claim 1 in its entirety.
  • a significant feature of the invention accordingly is that a minimum volume of the gas side is predetermined by the choice of the depth of the pot, which essentially corresponds to the volume of the pot when the bellows are contracted
  • the storage housing is designed as a tubular body, the storage housing at the lower and upper open tube end each having a GepatiuseabQueryteil in the form of a flat plate which is secured to the storage housing by means of a snap ring and sealed by a sealing member relative to the storage housing
  • the lower housing end part has a fluid port leading to the located in the interior of the storage housing fluid side in that the upper housing end part has a gas filling port
  • the pot is disposed at the movable end of the bellows, the immovable end of which is fixed to the upper housing end part, and the pot is thin-walled.
  • a spacer means disposed within the storage enclosure and in fluid communication with the interior of the bladder adjacent to the bladder to form an additional media space.
  • the desired additional volume can be made available by a correspondingly selected depth of the pot.
  • the arrangement may be such that the pot is held axially immovable in the storage housing and forms at its opening the fixing point for immovable end of the bellows.
  • the pot is arranged as a movable element at the movable end of the bellows, whose immovable end is fixed in this case on the upper housing end part.
  • the interior of the bellows may be associated with the gas side with particular advantage, that is, the volume of the additional media space formed by the pot together with the interior of the bellows defines the volume of the gas side, so that for the operation of the hydraulic accumulator a correspondingly large volume Working gas is available.
  • the immovable end of the bellows may be fixed to the upper housing part located at one end of the accumulator housing, at which the gas filling port for working gas is provided ,
  • embodiments belonging to the invention can at the end of the storage housing, which opposes the end having the gas filling port is to be provided, the lower housing end part, which limits the located on the outside of the bellows fluid side and having a fluid port.
  • a memory housing 1 which has a semi-cylindrical interior and is closed at the overhead in the drawing end 3 to a central opening 5.
  • the storage housing 1 is closed by a housing end part 9, which has a centrally located fluid connection 11 which leads to the fluid side 13 located in the interior.
  • the end part 9 is secured by a snap ring 15 and sealed by a sealing element 17 relative to the storage housing 1.
  • the Gescouseab gleichteil 9 has the shape of a flat plate, wherein at the interior facing the plane an elastomeric ring member 19 in an annular groove is arranged, which projects slightly beyond the plane of the closure part 9.
  • the bellows 21 is open at the top end 27 in the drawing and closed at its other, lower end 29, wherein in the embodiment of Fig. 1 a closing part 31 is provided in the form of a thin plate, which adjoins the last bellows fold 23 on the movable end 29 of the bellows 21.
  • the bellows 21 is connected with its other, open end 27 with a spacer device which has the shape of a pot 33 which is fixed axially immovable in the storage housing 1.
  • the pot 33 is connected at the edge 35 of its opening with the last fold 23 of the bellows 21, so that the interior of the pot 33 is in fluid communication with the interior of the bellows 21 and thus forms an additional volume to the volume of the bellows 21.
  • the opening edge 35 of the pot 33 forms the fixing point for the immovable end 27 of the bellows 21.
  • the sealed via a sealing member 37 on the outside with respect to the storage housing 1 pot 33 has on the bottom of the pot to a gas filling port 39 which extends through the opening 5 of the storage housing. 1 is accessible.
  • Fig. 2 differs in contrast insofar as the overhead in the figure, immovable open end 27 is not connected to the spacer device, but fixed to a housing part 41 is, which is located at the upper end 3 of the storage case 1 and, like the pot 33 of the first embodiment, is sealed by a sealing member 37.
  • a sealing member 37 In a similar manner as in the pot 33 of the first embodiment is located in the housing part 41 in the central part of a gas filling port 39 which is accessible via the opening 5.
  • a gas filling port 39 which is accessible via the opening 5.
  • the not belonging to the invention embodiment of Fig. 3 differs from the example of Fig. 1 only insofar as the storage housing 1 has the shape of a tube which is continuous from the lower end 7 to the upper end 3 on the inside. While in the first embodiment of Fig. 1 the additional volume of the bellows 21 forming pot 33 is supported on the closed upper end 3 of the storage housing 1 is in the example of Fig. 3 the pot 33 is secured at the upper open tube end 3 of the storage housing 1 by means of a snap ring 61.
  • Fig. 4 corresponds to the embodiment of Fig. 2 , except that the storage case 1 is again formed as a tubular body. Accordingly, the housing part 41 connected to the immovable end 27 is axially secured at the open tube end 3 of the storage housing 1 by means of a snap ring 61.
  • the preparation of the storage housing 1 from a tubular body allows a particularly simple, efficient and cost-effective production of Balg Itemss.
  • hydraulic accumulators according to the invention of different specifications can be designed by setting a minimum volume by selecting the depth of the respective pot 33, which essentially corresponds to the volume of the pot 33 when the bellows 21 are contracted.
  • the maximum volume of the other media space is predetermined, which is located on the outside of the contracted bellows 21.
  • FIGS. 1 to 3 shown embodiments of the subject matter of the invention differing features, these serve to explain the in FIG. 4 shown inventive solution.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Description

Die Erfindung betrifft einen Hydrospeicher mit den Merkmalen im Oberbegriff von Anspruch 1.The invention relates to a hydraulic accumulator having the features in the preamble of claim 1.

Hydrospeicher mit einem als bewegbares Trennelement dienenden Balg sind bekannt und finden auf verschiedenen technischen Gebieten Anwendung, beispielsweise bei hydraulischen Bremssystemen für Fahrzeuge und den verschiedensten industriellen Hydrauliksystemen. Die DE 10 2008 061 221 A1 zeigt beispielsweise einen Balgspeicher, bei dem als bewegliches Trennelement zwischen Gasseite und Fluidseite ein Metallbalg vorgesehen ist.Hydraulic accumulator with serving as a movable separator bellows are known and find application in various technical fields, for example in hydraulic brake systems for vehicles and various industrial hydraulic systems. The DE 10 2008 061 221 A1 shows, for example, a bellows, in which a metal bellows is provided as a movable separating element between the gas side and the fluid side.

Balgspeicher zeichnen sich durch mehrere vorteilhafte Eigenschaften aus. So lassen sich durch Ausziehen und Zusammenziehen des Balges verhältnismäßig große Volumenänderungen der im Speichergehäuse befindlichen Medienräume realisieren. Auch sind als bewegliches Trennelement vorgesehene Metallbälge gegenüber den Wechselbelastungen, wie sie im Betrieb, insbesondere bei einem Einsatz als Pulsationsdämpfer, auftreten können, verhältnismäßig robust und weisen gute Dichteigenschaften ohne Diffusionsverluste auf. Diesen Eigenschaften steht jedoch entgegen, dass Metallbälge, die für den Einsatz bei Hydrospeichern in Frage kommen, verhältnismäßig teure Bauteile sind, so dass die Herstellung der Balgspeicher verhältnismäßig kostenintensiv ist.
Die DE 102 53 012 A1 offenbart einen Hydrospeicher in Form eines Balgspeichers, mit einem Speichergehäuse, in dem der eine vorgebbare Anzahl Falten aufweisende Balg ein bewegbares Trennelement zwischen Gasseite und Fluidseite bildet, wobei eine Distanzeinrichtung vorgesehen ist, die innerhalb des Speichergehäuses angeordnet und unter Bildung eines zusätzlichen Medienraumes mit dem Inneren des Balges in Fluidverbindung ist und an den Balg benachbart angrenzt, wobei die Distanzeinrichtung die Form eines Topfes besitzt, der mit seiner Öffnung an einem offenen Ende des Balges mit fluiddichter Verbindung angebracht ist. Im zusammengezogenen Zustand des Balges wird eine Gaskammer durch eine zylindrische Ausnehmung eines Kolbens und durch den Raum zwischen Kolben und Balg gebildet.
Weitere Hydrospeicher mit Distanzeinrichtungen, welche in einer Bewegungsrichtung eines Schließteils eines Balges einen Anschlag bilden, gehen aus der DE 1425538 A1 , DE 10 2006 025 552 A1 , der JP S57-98396 und der GB 603 363 hervor.
Im Hinblick hierauf stellt sich die Erfindung die Aufgabe, einen Balgspeicher zur Verfügung zu stellen, der rationell und kostengünstig herstellbar ist.
Erfindungsgemäß ist diese Aufgabe durch einen Balgspeicher gelöst, der die Merkmale des Patentanspruchs 1 in seiner Gesamtheit aufweist.
Eine wesentliche Besonderheit der Erfindung besteht demgemäß darin, dass durch die Wahl der Tiefe des Topfes ein Mindestvolumen der Gasseite vorgegeben ist, das bei zusammengezogenem Balg im Wesentlichen dem Volumen des Topfes entspricht, das Speichergehäuse als Rohrkörper ausgebildet ist, das Speichergehäuse am unteren und oberen offenen Rohrende jeweils ein Gehäuseabschlussteil in Form einer ebenen Platte aufweist, das am Speichergehäuse mittels eines Sprengrings gesichert und mittels eines Dichtelements gegenüber dem Speichergehäuse abgedichtet ist, das untere Gehäuseabschlussteil einen Fluidanschluss aufweist, der zu der im Innenraum des Speichergehäuses befindlichen Fluidseite führt, das obere Gehäuseabschlussteil einen Gas-Füllanschluss aufweist, der Topf am bewegbaren Ende des Balges angeordnet ist, dessen unbewegbares Ende am oberen Gehäuseabschlussteil festgelegt ist, und der Topf dünnwandig ausgebildet ist.
Es ist eine Distanzeinrichtung vorgesehen, die innerhalb des Speichergehäuses angeordnet ist und unter Bildung eines zusätzlichen Medienraumes mit dem Inneren des Balges in Fluidverbindung ist oder an den Balg benachbart angrenzt. Dadurch, dass mittels der Distanzeinrichtung zusätzlich zu dem Volumen des Arbeitsraumes, das das Innere des Balges bei dessen Arbeits- oder Hubbewegungen bildet und das von der Geometrie und der Anzahl der Balgverhalten abhängig ist, von der Distanzeinrichtung ein Zusatzvolumen zur Verfügung steht, lässt sich ein gewünschtes Gesamtvolumen der Arbeitsräume im Speichergehäuse durch einen kleiner dimensionierten Faltenbalg mit einer entsprechend geringeren Anzahl von Falten verwirklichen. Durch die Benutzung kleinerer Faltenbälge ergibt sich somit eine wesentliche Verringerung der Herstellungskosten. Ein weiterer Vorteil besteht darin, dass sich durch unterschiedliche Wahl der Größe des von der Distanzeinrichtung zur Verfügung gestellten Zusatzvolumens unterschiedliche Gesamtvolumina mit Bälgen jeweils gleicher Faltenzahl realisieren lassen. Durch die Möglichkeit der Benutzung gleichartiger Bälge für Hydrospeicher unterschiedlicher Spezifikationen eröffnet sich die Möglichkeit einer weiteren Kostenverringerung durch Benutzung von Bälgen, die einer Standardgröße entsprechen und somit in größeren Stückzahlen rationell und preisgünstig herstellbar sind.Bellows storage are characterized by several advantageous properties. Thus, by taking off and contraction of the bellows relatively large changes in volume of the media spaces located in the storage enclosure can be realized. Also provided as a movable separating element metal bellows relative to the alternating loads, as they can occur during operation, in particular when used as a pulsation damper, relatively robust and have good sealing properties without diffusion losses. However, these properties are counteracted by the fact that metal bellows, which are suitable for use in hydraulic accumulators, are proportionate are expensive components, so that the production of Belgspeicher is relatively expensive.
The DE 102 53 012 A1 discloses a hydraulic accumulator in the form of a bellows accumulator, comprising a storage housing in which the predetermined number of bellows bellows forms a movable separator between the gas side and fluid side, wherein a spacer means is provided, which is arranged within the storage housing and to form an additional media space with the interior the bladder is in fluid communication and adjacent to the bellows, the distancing means being in the form of a pot which is attached with its opening to an open end of the bellows with fluid tight connection. In the contracted state of the bellows, a gas chamber is formed by a cylindrical recess of a piston and by the space between the piston and bellows.
Other hydraulic accumulator with spacer devices, which form a stop in a direction of movement of a closing part of a bellows, go out of the DE 1425538 A1 . DE 10 2006 025 552 A1 , of the JP S57-98396 and the GB 603,363 out.
In view of this, the object of the invention is to provide a bellows accumulator which can be produced efficiently and inexpensively.
According to the invention, this object is achieved by a bellows memory having the features of claim 1 in its entirety.
A significant feature of the invention accordingly is that a minimum volume of the gas side is predetermined by the choice of the depth of the pot, which essentially corresponds to the volume of the pot when the bellows are contracted, the storage housing is designed as a tubular body, the storage housing at the lower and upper open tube end each having a Gehäuseabschlussteil in the form of a flat plate which is secured to the storage housing by means of a snap ring and sealed by a sealing member relative to the storage housing, the lower housing end part has a fluid port leading to the located in the interior of the storage housing fluid side in that the upper housing end part has a gas filling port, the pot is disposed at the movable end of the bellows, the immovable end of which is fixed to the upper housing end part, and the pot is thin-walled.
There is provided a spacer means disposed within the storage enclosure and in fluid communication with the interior of the bladder adjacent to the bladder to form an additional media space. The fact that by means of the spacer device in addition to the volume of the working space, which forms the interior of the bellows in its working or lifting movements and which is dependent on the geometry and the number of bellows behavior, from the distance means an additional volume is available, can be desired total volume of the working spaces in the storage enclosure by a smaller sized bellows with a correspondingly lower number of folds realize. By using smaller bellows thus results in a significant reduction in manufacturing costs. Another advantage is that different total volumes can be realized with bellows of the same number of folds by a different choice of the size of the additional volume made available by the spacer device. The possibility of using similar bellows for hydraulic accumulator of different specifications opens up the possibility of further cost reduction through the use of bellows, which correspond to a standard size and thus can be produced efficiently and inexpensively in larger quantities.

Auf einfache Weise lässt sich durch eine entsprechend gewählte Tiefe des Topfes das gewünschte Zusatzvolumen zur Verfügung stellen.In a simple way, the desired additional volume can be made available by a correspondingly selected depth of the pot.

Die Anordnung kann so getroffen sein, dass der Topf im Speichergehäuse axial unbeweglich gehalten ist und an seiner Öffnung die Festlegestelle für das unbewegbare Ende des Balges bildet.The arrangement may be such that the pot is held axially immovable in the storage housing and forms at its opening the fixing point for immovable end of the bellows.

Erfindungsgemäß ist jedoch der Topf als bewegbares Element am bewegbaren Ende des Balges angeordnet, dessen unbewegbares Ende in diesem Falle am oberen Gehäuseabschlussteil festgelegt ist.According to the invention, however, the pot is arranged as a movable element at the movable end of the bellows, whose immovable end is fixed in this case on the upper housing end part.

In beiden Fällen kann mit besonderem Vorteil das Innere des Balges der Gasseite zugeordnet sein, dass also das Volumen des vom Topf gebildeten zusätzlichen Medienraumes zusammen mit dem Inneren des Balges das Volumen der Gasseite definiert, so dass für den Betrieb des Hydrospeichers ein entsprechend großes Volumen an Arbeitsgas zur Verfügung steht.In both cases, the interior of the bellows may be associated with the gas side with particular advantage, that is, the volume of the additional media space formed by the pot together with the interior of the bellows defines the volume of the gas side, so that for the operation of the hydraulic accumulator a correspondingly large volume Working gas is available.

Bei nicht zur Erfindung gehörenden Ausführungsbeispielen mit axial unbewegbar angeordnetem Topf befindet sich dessen Boden an einem Ende des Speichergehäuses und weist einen Gas-Füllanschluss für ein Arbeitsgas auf.In not belonging to the invention embodiments with axially immovably arranged pot whose bottom is located at one end of the storage enclosure and has a gas filling connection for a working gas.

Bei zur Erfindung gehörenden Ausführungsbeispielen, bei denen der Topf mit dem bewegbaren Ende des Balges in Verbindung ist, kann das unbewegbare Ende des Balges an dem sich an einem Ende des Speichergehäuses befindenden oberen Gehäuseteil festgelegt sein, an dem der Gas-Füllanschluss für Arbeitsgas vorgesehen ist.In embodiments of the invention in which the pot is in communication with the movable end of the bellows, the immovable end of the bellows may be fixed to the upper housing part located at one end of the accumulator housing, at which the gas filling port for working gas is provided ,

Bei zur Erfindung gehörenden Ausführungsbeispielen kann an demjenigen Ende des Speichergehäuses, das dem den Gas-Füllanschluss aufweisenden Ende entgegengesetzt ist, das untere Gehäuseabschlussteil vorgesehen sein, das die sich an der Außenseite des Balges befindliche Fluidseite begrenzt und einen Fluidanschluss aufweist.In embodiments belonging to the invention can at the end of the storage housing, which opposes the end having the gas filling port is to be provided, the lower housing end part, which limits the located on the outside of the bellows fluid side and having a fluid port.

Mit besonderem Vorteil kann das untere Gehäuseabschlussteil einen Anschlag bilden, der Bewegungen des Balges auf einen Hub begrenzt, der einem vorgegebenen Maximalvolumen aus Volumen des Inneren des Balges und dem Zusatzvolumen des Topfes entspricht.
Nachstehend ist die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen im Einzelnen erläutert. Es zeigen:

Fig. 1
ein Ausführungsbeispiel eines nicht zur Erfindung gehörenden Hydrospeichers, halbseitig in Seitenansicht und halbseitig im Längsschnitt dargestellt;
Fig. 2
eine der Fig. 1 entsprechende Darstellung eines nicht zur Erfindung gehörenden zweiten Ausführungsbeispiels;
Fig. 3
in der Fig. 1 entsprechender Darstellung eine abgewandelte Ausführungsform eines nicht zur Erfindung gehörenden Ausführungsbeispiels; und
Fig. 4
in der Fig. 2 entsprechender Darstellung eine abgewandelte Ausführungsform eines zur Erfindung gehörenden Ausführungsbeispiels.
With particular advantage, the lower housing end part form a stop that limits movements of the bellows to a stroke that corresponds to a predetermined maximum volume of volume of the interior of the bellows and the additional volume of the pot.
The invention with reference to embodiments shown in the drawings will be explained in detail. Show it:
Fig. 1
an embodiment of a not belonging to the invention hydraulic accumulator, half-side view in side view and half-side in longitudinal section;
Fig. 2
one of the Fig. 1 corresponding representation of a not belonging to the invention second embodiment;
Fig. 3
in the Fig. 1 corresponding representation of a modified embodiment of an embodiment not belonging to the invention; and
Fig. 4
in the Fig. 2 corresponding representation of a modified embodiment of an embodiment of the invention.

Die in Fig. 1 und 2 dargestellten nicht zur Erfindung gehörenden Ausführungsbeispiele weisen ein Speichergehäuse 1 auf, das einen halbzylinderförmigen Innenraum aufweist und an dem in der Zeichnung obenliegenden Ende 3 bis auf eine zentrale Öffnung 5 geschlossen ist. Am unteren Ende 7 ist das Speichergehäuse 1 durch ein Gehäuseabschlussteil 9 geschlossen, das einen zentral gelegenen Fluidanschluss 11 aufweist, der zu der im Innenraum befindlichen Fluidseite 13 führt. Das Abschlussteil 9 ist durch einen Sprengring 15 gesichert und mittels eines Dichtelementes 17 gegenüber dem Speichergehäuse 1 abgedichtet. Das Gehäuseabschlussteil 9 hat die Form einer ebenen Platte, wobei an der dem Innenraum zugewandten Ebene ein elastomeres Ringelement 19 in einer Ringnut angeordnet ist, das über die Ebene des Abschlussteils 9 geringfügig vorsteht.In the Fig. 1 and 2 illustrated not belonging to the invention embodiments, a memory housing 1, which has a semi-cylindrical interior and is closed at the overhead in the drawing end 3 to a central opening 5. At the lower end 7, the storage housing 1 is closed by a housing end part 9, which has a centrally located fluid connection 11 which leads to the fluid side 13 located in the interior. The end part 9 is secured by a snap ring 15 and sealed by a sealing element 17 relative to the storage housing 1. The Gehäuseabschlussteil 9 has the shape of a flat plate, wherein at the interior facing the plane an elastomeric ring member 19 in an annular groove is arranged, which projects slightly beyond the plane of the closure part 9.

Als Trennelement zwischen der Fluidseite 13 und einer Gasseite 25 befindet sich im Innenraum des Speichergehäuses 1 ein metallischer Balg 21 mit einer vorgegeben Anzahl von Balgfalten 23, die in den Figuren nur teilweise beziffert sind. Der Balg 21 ist an dem in der Zeichnung obenliegenden Ende 27 offen und an seinem anderen, unteren Ende 29 geschlossen, wobei bei dem Ausführungsbeispiel von Fig. 1 ein Schließteil 31 in Form einer dünnen Platte vorgesehen ist, die sich an die letzte Balgfalte 23 am bewegbaren Ende 29 des Balges 21 anschließt. Bei dem Ausführungsbeispiel von Fig. 1 ist der Balg 21 mit seinem anderen, offenen Ende 27 mit einer Distanzeinrichtung verbunden, die die Form eines Topfes 33 hat, der im Speichergehäuse 1 axial unbewegbar festgelegt ist. Der Topf 33 ist am Rand 35 seiner Öffnung mit der letzten Falte 23 des Balges 21 verbunden, so dass der Innenraum des Topfes 33 mit dem Inneren des Balges 21 in Fluidverbindung ist und somit ein Zusatzvolumen zum Volumen des Balges 21 bildet. Gleichzeitig bildet der Öffnungsrand 35 des Topfes 33 die Festlegestelle für das unbewegbare Ende 27 des Balges 21. Der über ein Dichtelement 37 außenseitig gegenüber dem Speichergehäuse 1 abgedichtete Topf 33 weist am Topfboden einen Gas-Füllanschluss 39 auf, der über die Öffnung 5 des Speichergehäuses 1 zugänglich ist. Bei dem in Fig. 1 dargestellten Betriebszustand, bei dem auf der Gasseite 25 und damit innerhalb des Topfes 33 und im Inneren des Balges 21 ein Vorspanndruck herrscht und die Fluidseite 13 drucklos ist, bildet das Gehäuseabschlussteil 9 für das Schließteil 31 am bewegbaren Ende 29 des Balges 21 einen Anschlag zur Hubbegrenzung, wobei das am Abschlusssteil 9 befindliche Ringelement 19 eine nachgiebige Anlagestelle bildet.As a separating element between the fluid side 13 and a gas side 25 is located in the interior of the storage housing 1, a metallic bellows 21 with a predetermined number of bellows folds 23, which are only partially quantified in the figures. The bellows 21 is open at the top end 27 in the drawing and closed at its other, lower end 29, wherein in the embodiment of Fig. 1 a closing part 31 is provided in the form of a thin plate, which adjoins the last bellows fold 23 on the movable end 29 of the bellows 21. In the embodiment of Fig. 1 the bellows 21 is connected with its other, open end 27 with a spacer device which has the shape of a pot 33 which is fixed axially immovable in the storage housing 1. The pot 33 is connected at the edge 35 of its opening with the last fold 23 of the bellows 21, so that the interior of the pot 33 is in fluid communication with the interior of the bellows 21 and thus forms an additional volume to the volume of the bellows 21. At the same time the opening edge 35 of the pot 33 forms the fixing point for the immovable end 27 of the bellows 21. The sealed via a sealing member 37 on the outside with respect to the storage housing 1 pot 33 has on the bottom of the pot to a gas filling port 39 which extends through the opening 5 of the storage housing. 1 is accessible. At the in Fig. 1 illustrated operating state in which there is a bias pressure on the gas side 25 and thus within the pot 33 and inside the bellows 21 and the fluid side 13 is depressurized, forms the housing end part 9 for the closing part 31 at the movable end 29 of the bellows 21 is a stop for stroke limitation , wherein the ring member 19 located at the end portion 9 forms a resilient abutment point.

Das Beispiel von Fig. 2 unterscheidet sich demgegenüber insofern, als das in der Figur obenliegende, unbewegliche offene Ende 27 nicht mit der Distanzeinrichtung verbunden ist, sondern an einem Gehäuseteil 41 festgelegt ist, das sich am oberen Ende 3 des Speichergehäuses 1 befindet und, wie der Topf 33 des ersten Ausführungsbeispiels, mittels eines Dichtelements 37 abgedichtet ist. In ähnlicher Weise wie bei dem Topf 33 des ersten Ausführungsbeispiels befindet sich auch im Gehäuseteil 41 im Zentralteil ein Gas-Füllanschluss 39, der über die Öffnung 5 zugänglich ist. Anders als beim Beispiel von Fig. 1 ist ein als Distanzeinrichtung dienender Topf 33 nicht am unbewegbaren Ende 27, sondern am bewegbaren Ende 29 des Balges angebracht, wobei der Topf 33, als mit dem Balg 21 bewegbares Bauelement, dünnwandig ausgebildet ist und mit seinem Topfboden 43 bei Maximalhub des Balges 21 zur Hubbegrenzung mit dem nachgiebigen Ringelement 19 des Gehäuseabschlussteils 9 in Anlage kommt.The example of Fig. 2 differs in contrast insofar as the overhead in the figure, immovable open end 27 is not connected to the spacer device, but fixed to a housing part 41 is, which is located at the upper end 3 of the storage case 1 and, like the pot 33 of the first embodiment, is sealed by a sealing member 37. In a similar manner as in the pot 33 of the first embodiment is located in the housing part 41 in the central part of a gas filling port 39 which is accessible via the opening 5. Unlike the example of Fig. 1 a serving as a spacer cup 33 is not attached to immovable end 27, but at the movable end 29 of the bellows, wherein the pot 33, as a moveable with the bellows 21 component, thin-walled and with its bottom cup 43 at maximum stroke of the bellows 21 to limit the stroke comes into abutment with the resilient ring member 19 of the housing closure part 9.

Das nicht zur Erfindung gehörende Ausführungsbeispiel von Fig. 3 unterscheidet sich vom Beispiel von Fig. 1 lediglich insofern, als das Speichergehäuse 1 die Form eines Rohres besitzt, das vom unteren Ende 7 bis zum oberen Ende 3 innenseitig durchgehend ist. Während sich bei dem ersten Ausführungsbeispiel von Fig. 1 der das Zusatzvolumen des Balges 21 bildende Topf 33 an dem geschlossenen oberen Ende 3 des Speichergehäuses 1 abstützt, ist bei dem Beispiel von Fig. 3 der Topf 33 am oberen offenen Rohrende 3 des Speichergehäuses 1 mittels eines Sprengringes 61 gesichert.The not belonging to the invention embodiment of Fig. 3 differs from the example of Fig. 1 only insofar as the storage housing 1 has the shape of a tube which is continuous from the lower end 7 to the upper end 3 on the inside. While in the first embodiment of Fig. 1 the additional volume of the bellows 21 forming pot 33 is supported on the closed upper end 3 of the storage housing 1 is in the example of Fig. 3 the pot 33 is secured at the upper open tube end 3 of the storage housing 1 by means of a snap ring 61.

Das zur Erfindung gehörende Beispiel von Fig. 4 entspricht dem Ausführungsbeispiel von Fig. 2, abgesehen davon, dass das Speichergehäuse 1 wiederum als Rohrkörper ausgebildet ist. Dementsprechend ist das mit dem unbewegbaren Ende 27 verbundene Gehäuseteil 41 am offenen Rohrende 3 des Speichergehäuses 1 mittels eines Sprengringes 61 axial gesichert.
Die Herstellung des Speichergehäuses 1 aus einem Rohrkörper ermöglicht eine besonders einfache, rationelle und kostengünstige Herstellung des Balgspeichers.The belonging to the invention example of Fig. 4 corresponds to the embodiment of Fig. 2 , except that the storage case 1 is again formed as a tubular body. Accordingly, the housing part 41 connected to the immovable end 27 is axially secured at the open tube end 3 of the storage housing 1 by means of a snap ring 61.
The preparation of the storage housing 1 from a tubular body allows a particularly simple, efficient and cost-effective production of Balgspeichers.

Wie ersichtlich, lassen sich mit Bälgen 21 mit der gleichen Anzahl von Balgfalten 23 erfindungsgemäße Hydrospeicher unterschiedlicher Spezifikationen gestalten, indem durch Wahl der Tiefe des jeweiligen Topfes 33 ein Mindestvolumen vorgegeben ist, das bei zusammengezogenem Balg 21 im Wesentlichen dem Volumen des Topfes 33 entspricht. Andererseits ist durch Wahl der axialen Länge des Speichergehäuses 1 das Maximalvolumen des anderen Medienraumes vorgegeben, das sich an der Außenseite des zusammengezogenen Balges 21 befindet.As can be seen, with bellows 21 with the same number of bellows folds, hydraulic accumulators according to the invention of different specifications can be designed by setting a minimum volume by selecting the depth of the respective pot 33, which essentially corresponds to the volume of the pot 33 when the bellows 21 are contracted. On the other hand, by selecting the axial length of the storage housing 1, the maximum volume of the other media space is predetermined, which is located on the outside of the contracted bellows 21.

Sofern die in den Figuren 1 bis 3 gezeigten Ausführungsbeispiele vom Gegenstand der Erfindung abweichende Merkmale zeigen, dienen diese zur Erläuterung der in Figur 4 gezeigten erfindungsgemäßen Lösung.Provided that in the FIGS. 1 to 3 shown embodiments of the subject matter of the invention differing features, these serve to explain the in FIG. 4 shown inventive solution.

Claims (4)

  1. A hydraulic accumulator in the form of a bellows accumulator, with an accumulator housing (1) in which the bellows (21) having a predefinable number of pleats (23) forms a movable separation element between gas side (25) and fluid side (13), wherein a spacer device (33) is provided which is arranged inside the accumulator housing (1) and is in fluid connection with the interior of the bellows (21), accompanied by the formation of an additional media space, and is adjacent to the bellows (21), wherein the spacer device has the form of a pot (33), which is attached on an open end of the bellows (21) with its opening (35), with a fluid-tight connection,
    wherein, by choosing the depth of the pot (33), a minimum volume of the gas side (25) is predefined which, when the bellows (21) is contracted, corresponds substantially to the volume of the pot (33),
    wherein the accumulator housing (1) is designed as tubular body, characterised in that
    - the accumulator housing (1) has, at the bottom (7) and top (3) open tube end respectively, a housing end part (9, 41) in the form of a flat plate which is secured to the accumulator housing (1) by means of a snap ring (15, 61) and sealed vis-à-vis the accumulator housing (1) by means of a sealing element (17, 37),
    - the bottom housing end part (9) has a fluid connection (11) which leads to the fluid side located in the interior of the accumulator housing (1),
    - the top housing end part (41) has a gas filling connection (39),
    - the pot (33) is arranged at the movable end (29) of the bellows (21), the immovable end (27) of which is secured on the top housing end part (41), and
    - the pot (33) is designed thin-walled.
  2. The hydraulic accumulator according to claim 1, characterised in that the immovable end (27) of the bellows (21) is secured on the top housing part (41) located on the top end (3) of the accumulator housing (1), on which the gas filling connection (39) for a working gas is provided.
  3. The hydraulic accumulator according to one of the preceding claims, characterised in that the bottom housing end part (9) is provided on the bottom end (7) of the accumulator housing (1), which is opposite the end (3) assigned to the gas filling connection (39), which bottom housing end part has the fluid connection (11) and borders the fluid side (13) located on the outside of the bellows (21).
  4. The hydraulic accumulator according to one of the preceding claims, characterised in that the bottom housing end part (9) forms a stop which limits the movements of the bellows (21) to a stroke which corresponds to a predefined maximum volume comprised of the volume of the interior of the bellows (21) plus the additional volume of the pot (33).
EP12786824.8A 2011-11-05 2012-10-29 Hydraulic accumulator in form of a bellows accumulator Active EP2773874B1 (en)

Priority Applications (1)

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EP18195927.1A EP3453891B1 (en) 2011-11-05 2012-10-29 Hydraulic accumulator in form of a bellows accumulator

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DE102011117752A DE102011117752A1 (en) 2011-11-05 2011-11-05 Hydraulic accumulator in the form of a bellows accumulator
PCT/EP2012/004512 WO2013064233A1 (en) 2011-11-05 2012-10-29 Hydraulic accumulator in form of a bellows accumulator

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EP18195927.1A Division-Into EP3453891B1 (en) 2011-11-05 2012-10-29 Hydraulic accumulator in form of a bellows accumulator

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JP (1) JP6224604B2 (en)
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DE102015012253A1 (en) * 2015-09-18 2017-03-23 Hydac Technology Gmbh Bellows accumulator, in particular pulsation damper
DE102016014779A1 (en) 2016-12-10 2018-06-14 Hydac Technology Gmbh Hydropneumatic piston-cylinder arrangement
US11320320B2 (en) * 2018-07-25 2022-05-03 Texas Instruments Incorporated Temperature sensor circuit for relative thermal sensing

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WO2013064233A1 (en) 2013-05-10
EP3453891A1 (en) 2019-03-13
JP6224604B2 (en) 2017-11-01
EP3453891B1 (en) 2021-06-16
EP2773874A1 (en) 2014-09-10
DE102011117752A1 (en) 2013-05-08
US9644644B2 (en) 2017-05-09
US20140230939A1 (en) 2014-08-21
JP2014532847A (en) 2014-12-08

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