EP0007970A1 - Pressure accumulator - Google Patents

Pressure accumulator Download PDF

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Publication number
EP0007970A1
EP0007970A1 EP79101195A EP79101195A EP0007970A1 EP 0007970 A1 EP0007970 A1 EP 0007970A1 EP 79101195 A EP79101195 A EP 79101195A EP 79101195 A EP79101195 A EP 79101195A EP 0007970 A1 EP0007970 A1 EP 0007970A1
Authority
EP
European Patent Office
Prior art keywords
opening
annular groove
housing
lower shell
edge
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
EP79101195A
Other languages
German (de)
French (fr)
Other versions
EP0007970B1 (en
Inventor
Karl Heinz Brenzinger
Franz-Josef König
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.)
Assunzione O Variazione Mandato hans Benno Mayer
Original Assignee
Alfred Teves GmbH
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Filing date
Publication date
Application filed by Alfred Teves GmbH filed Critical Alfred Teves GmbH
Publication of EP0007970A1 publication Critical patent/EP0007970A1/en
Application granted granted Critical
Publication of EP0007970B1 publication Critical patent/EP0007970B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/24—Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/12—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery
    • F15B1/125—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery characterised by the attachment 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
    • F15B2201/20—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
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • 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
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid ports having valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports
    • 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
    • F15B2201/435—Anti-extrusion means being fixed to the separating means

Definitions

  • the invention relates to a pressure accumulator with a housing, which consists of an upper and a lower part and the interior is divided by an elastic partition into a gas and a liquid space, the upper part until it rests against a stop in the cylindrical opening of the lower part is inserted and the edge of the cylindrical opening of the lower part is deformed without cutting around the edge of the upper part.
  • a pressure accumulator which has a lower part, in the cylindrical opening of which an upper part is inserted.
  • the depth of insertion of the upper part into the lower part is limited by the abutment of the edge of the upper part on a shoulder on the inner wall of the lower part.
  • this housing is subdivided by an elastic partition into a gas and a liquid space, the partition being inserted with a bead formed around its periphery into a groove which is open radially outwards at the region of the upper part which is pushed into the lower part.
  • the upper part in the area of its opening has a radially outwardly protruding circumferential projection of approximately rectangular cross-section, and in the inner wall of the lower part in the area of the opening a radially inwardly open annular groove is formed, before the assembly of the Housing, the inside diameter of the lower part on the side facing away from the opening is smaller and on the side facing the opening larger than the outside diameter of the extension of the upper part, so that the upper part into the lower part until one side surface of the extension lies against the side wall remote from the lower part opening the annular groove is insertable and the cross-section of the annular groove is designed prior to the assembly of the housing such that it acts on the outer circumference of the lower part in the region of the annular groove with a radially inward component and a compo directed axially towards the lower part opening Nente the cross section of the approach can be adjusted and in the assembled state, the approach of which engages in the lower part of the inserted upper part in the annular groove.
  • the side surface of the extension which is farther from the opening of the upper part is inclined radially inward in the manner of an undercut.
  • this causes the neck of the upper part to be braced axially in the annular groove of the lower part and thus a fixed installation position.
  • This increases the axial bracing that already occurs due to the axially elastic springback of the axially deformed part.
  • Aluminum is particularly suitable as a material because of its favorable elastic properties.
  • the inside diameter of the lower part is advantageously approximately the same on both sides of the annular groove.
  • the upper part is advantageously formed at the mouth of its opening with a circumferential cylindrical edge which can be inserted into a correspondingly designed cylindrical guide in the lower part on the side of the annular groove facing away from the opening is.
  • a simple way of fastening the elastic partition in the housing is achieved in that in the lower part on the side facing away from the mouth opening An annular groove is formed in the annular groove, which is open in the axial direction towards the mouth opening and into which a bead is formed which is circumferentially formed on the edge of the partition wall and on which the end wall of the mouth opening of the upper part is in contact when the housing is assembled.
  • the pressure accumulator shown in the drawing has a housing which consists of a lower part 1 and an upper part 2.
  • a radially inwardly open annular groove 3 is formed in the inner wall, the cross section of which is approximately rectangular in the assembled state of the housing.
  • the inner wall is designed as a cylindrical guide 4, into which the upper part 2 can be inserted with a cylindrical rim 5 which is formed at the mouth of its opening.
  • the end of the cylindrical guide 4 on the side facing away from the annular groove 3 simultaneously forms the radially outer one Side wall of a circumferential groove 6 which is open in the lower part 1 in the axial direction towards the mouth opening.
  • An elastic partition 7 dividing the housing interior into a gas space 9 and a liquid space 10 is provided at its edge with a circumferential bead 8 which is inserted into the circumferential groove 6 of the lower part 1.
  • the end wall 11 of the mouth opening of the upper part abuts on the bead 8 and thus holds it in its installed position in the groove 6.
  • the upper part 2 is formed in the region of its cylindrical mouth opening with a radially outwardly projecting peripheral projection 12, the cross section of which corresponds to the cross section of the annular groove 3 when the housing is assembled.
  • the side surface 13 of the extension 12 which is farther from the opening of the upper part 2 is inclined radially inward in the manner of an undercut.
  • the upper and lower parts Before the housing is assembled, the upper and lower parts have the shape shown in FIG.
  • the inner diameter of the lower part 1 is smaller on the side of the annular groove 3 facing away from the opening and larger on the side of the annular groove 3 facing the opening than the outer diameter of the extension 12. This enables the lower part 2 until one side surface 14 of the extension lies against the opening 12 on the side wall 15 of the annular groove 3 which is more distant from the lower part opening.
  • the cross section of the annular groove 3 is formed before assembly of the housing so that it is through a the pressure acting on the outer circumference of the lower part 1 in the region of the annular groove 3 is deformed such that after the deformation it corresponds to the cross section of the extension 12.
  • the pressure acting on the lower part 1 has a radially inwardly directed component and an axially directed component towards the lower part opening. Such pressurization can be achieved, for example, during a pulling process.
  • the annular groove 3 engages around the neck 12. Relieving the lower part 1 of the deformation pressure leads to a springback of the deformed part of the lower part 1 in the axial and radial directions. Since the side surface 13 of the shoulder 12 is inclined radially inwards and the side wall 16 of the annular groove 3 is deformed to a corresponding inclination, the radial springback also causes the shoulder 12 of the upper part 2 to be braced in the annular groove 3 in addition to the axial springback. so that a secure and firm connection of the two housing parts 1 and 2 is achieved under all operating conditions.

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

Abstract

1. A pressure accumulator including a housing which consists of an upper and a lower shell (1) and has its inner chamber separated into a gas and a liquid compartment by means of an elastic partition wall (7), wherein the upper shell (2) is slid into the cylindrical opening of the lower shell (1) until it abuts a stop and the edge of the cylindrical opening of the lower shell is chipless formed to fit about the edge (5) of the upper shell (2), said edge being formed by a radially outwardly extending circumferential projection (12) of approximately rectangular cross-section, characterized in that a radially inwardly open annular groove (3) is formed in the inner wall of the lower shell (1) in the area of the opening prior to its deformation, with the internal diameter of the lower shell (1) on the sideof the annular groove (3) remote from the opening being smaller than, and on the side of the annular groove (3) close to the opening being greater than, the external diameter of the projection (12) of the upper shell (2), so that the upper shell (2) is slidable into the lower shell (1) until the one lateral surface (14) of the projection (12) abuts the lateral wall (15) of the annular groove (3), which wall is remote from the opening of the lower shell, and with, prior to the assembly of the housing, the cross-section of the annular groove (3) being so formed that it is able to conform to the cross-section of the projection (12) as a result of the pressure acting on the outer circumference of the lower shell (1) in the area of the annular groove (3) with a component directed radially inwardly and a component directed axially towards the opening of the lower shell, and in that, after the deformation, the annular groove (3) engages the projection (12).

Description

Die Erfindung bezieht sich auf einen Druckspeicher mit einem Gehäuse, das aus einem Ober- und einem Unterteil besteht und dessen Innenraum durch eine elastische Trennwand in einen Gas- und einen Flüssigkeitsraum unterteilt ist, wobei das Oberteil bis zur Anlage an einem Anschlag in die zylindrische Öffnung des Unterteils eingeschoben und der Rand der zylindrischen Öffnung des Unterteils den Rand des Oberteils umgreifend spanlos verformt ist.The invention relates to a pressure accumulator with a housing, which consists of an upper and a lower part and the interior is divided by an elastic partition into a gas and a liquid space, the upper part until it rests against a stop in the cylindrical opening of the lower part is inserted and the edge of the cylindrical opening of the lower part is deformed without cutting around the edge of the upper part.

Aus der DE-PS 1 175 o43 ist ein Druckspeicher bekannt, der ein Unterteil aufweist, in dessen zylindrischer öffnung ein Oberteil eingeschoben ist. Die Einschubtiefe des Oberteils in das Unterteil ist durch die Anlage des Randes des Oberteils an einer Schulter an der Innenwand des Unterteils begrenzt. Nach dem Einschieben des Oberteils in das Unterteil ist der zunächst zylindrisch ausgebildete Rand an der Öffnung des Unterteils über den Rand des Oberteils gebördelt und so beide Teile zu einem geschlossenen Gehäuse fest miteinander verbunden. Der Innenraum dieses Gehäuses ist durch eine elastische Trennwand in einen Gas- und einen Flüssigkeitsraum unterteilt, wobei die Trennwand mit einem an ihrem Rand umlaufend ausgebildeten Wulst in eine radial nach aussen offene Nut am in das Unterteil eingeschobenen Bereich des Oberteils eingesetzt ist.From DE-PS 1 175 o43 a pressure accumulator is known which has a lower part, in the cylindrical opening of which an upper part is inserted. The depth of insertion of the upper part into the lower part is limited by the abutment of the edge of the upper part on a shoulder on the inner wall of the lower part. After the upper part has been pushed into the lower part, the initially cylindrical edge is flanged at the opening of the lower part over the edge of the upper part and thus both parts are firmly connected to one another to form a closed housing. The interior of this housing is subdivided by an elastic partition into a gas and a liquid space, the partition being inserted with a bead formed around its periphery into a groove which is open radially outwards at the region of the upper part which is pushed into the lower part.

Bei dem bekannten Druckspeicher ist der Umformungsgrad beim Umbördeln des Randes des Unterteils sehr gross. Dieser hohe Umformungsgrad führt aber beim Umformen zu einer starken Versprödung des Werkstoff, wodurch die Dauerbelastbarkeit des Druckspeichers erheblich herabgesetzt wird.In the known pressure accumulator, the degree of deformation when the edge of the lower part is flanged is very large. The However, this high degree of deformation leads to a strong embrittlement of the material during forming, which considerably reduces the durability of the pressure accumulator.

Es ist daher Aufgabe der Erfindung, einen Druckspeicher nach dem Oberbegriff zu schaffen, bei dem der Umformungsgrad des spanlos zu verformenden Randes des Unterteils so gering gehalten wird, dass durch die Kaltumformung keine Versprödung des Gehäusewerkstoffs auftritt und somit eine hohe Dauerbelastbarkeit des Druckspeichers gewährleistet ist.It is therefore an object of the invention to provide a pressure accumulator according to the preamble, in which the degree of deformation of the edge of the lower part to be formed without cutting is kept so low that no cold embrittlement of the housing material occurs and thus a high durability of the pressure accumulator is ensured.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass das Oberteil im Bereich seiner Öffnung einen radial nach aussen hervorstehenden umlaufenden Ansatz etwa rechteckigen Querschnitts hat, dass in der Innenwand des Unterteils im Bereich der Öffnung eine radial nach innen offene Ringnut ausgebildet ist, wobei vor dem Zusammenbau des Gehäuses der Innendurchmesser des Unterteils auf der der öffnung abgewandten Seite kleiner und auf der der Öffnung zugewandten Seite grösser ist als der Aussendurchmesser des Ansatzes des Oberteils, so dass das Oberteil in das Unterteil bis zur Anlage der einen Seitenfläche des Ansatzes an der der Unterteilöffnung entfernten Seitenwand der Ringnut einschiebbar ist und wobei der Querschnitt der Ringnut vor dem Zusammenbau des Gehäuses derart ausgebildet ist, dass er durch auf den Aussenumfang des Unterteils im Bereich der Ringnut einwirkenden Druck mit einer radial nach innen gerichteten Komponente und einer axial zur Unterteilöffnung hin gerichteten Komponente dem Querschnitt des Ansatzes angleichbar ist und im zusammengebauten Zustand der Ansatz des in das Unterteil des eingeschobenen Oberteils in die Ringnut eingreift. Diese Ausbildung des Druckspeichers ermöglicht es, relativ dicke Wandstärken in dem zu verformenden Bereich des Unterteils vorzusehen, da der Umformungsgrad nur niedrig ist. Diese dicken Wandstärken ermöglichen eine hohe Druckbelastung des Druckspeichers.This object is achieved according to the invention in that the upper part in the area of its opening has a radially outwardly protruding circumferential projection of approximately rectangular cross-section, and in the inner wall of the lower part in the area of the opening a radially inwardly open annular groove is formed, before the assembly of the Housing, the inside diameter of the lower part on the side facing away from the opening is smaller and on the side facing the opening larger than the outside diameter of the extension of the upper part, so that the upper part into the lower part until one side surface of the extension lies against the side wall remote from the lower part opening the annular groove is insertable and the cross-section of the annular groove is designed prior to the assembly of the housing such that it acts on the outer circumference of the lower part in the region of the annular groove with a radially inward component and a compo directed axially towards the lower part opening Nente the cross section of the approach can be adjusted and in the assembled state, the approach of which engages in the lower part of the inserted upper part in the annular groove. This training of Pressure accumulator makes it possible to provide relatively thick walls in the area of the lower part to be deformed, since the degree of deformation is only low. These thick walls allow a high pressure load on the pressure accumulator.

In einer vorteilhaften Ausbildung der Erfindung ist die der Öffnung des Oberteils entferntere Seitenfläche des Ansatzes hinterschneidungsartig radial nach innen geneigt. Dies bewirkt bei einer radialen elastischen Rückfederung des Randes des Unterteils nach der Verformung eine axiale Verspannung des Ansatzes des Oberteils in der Ringnut des Unterteils und damit eine feste Einbaulage. Damit wird die axiale Verspannung noch erhöht, die durch die axiale elastische Rückfederung des axial verformten Teils bereits eintritt. Dabei ist wegen der günstigen Elastizitätseigenschaften Aluminium als Werkstoff besonders geeignet.In an advantageous embodiment of the invention, the side surface of the extension which is farther from the opening of the upper part is inclined radially inward in the manner of an undercut. In the case of a radial elastic resilience of the edge of the lower part after the deformation, this causes the neck of the upper part to be braced axially in the annular groove of the lower part and thus a fixed installation position. This increases the axial bracing that already occurs due to the axially elastic springback of the axially deformed part. Aluminum is particularly suitable as a material because of its favorable elastic properties.

Beim zusammengebauten Gehäuse ist vorteilhafterweise der Innendurchmesser des Unterteils zu beiden Seiten der Ringnut etwa gleich.When the housing is assembled, the inside diameter of the lower part is advantageously approximately the same on both sides of the annular groove.

Um eine einwandfreie Einbaulage des Oberteils in das Unterteil vor der spanlosen Verformung zu erreichen, ist vorteilhafterweise das Oberteil an der Mündung seiner Öffnung mit einem umlaufenden zylindrischen Rand ausgebildet, der in eine entsprechend ausgebildete zylindrische Führung im Unterteil auf der der Mündungsöffnung abgewandten Seite der Ringnut einsetzbar ist.In order to achieve a correct installation position of the upper part in the lower part before the non-cutting deformation, the upper part is advantageously formed at the mouth of its opening with a circumferential cylindrical edge which can be inserted into a correspondingly designed cylindrical guide in the lower part on the side of the annular groove facing away from the opening is.

Eine einfache Befestigungsmöglichkeit der elastischen Trennwand im Gehäuse wird dadurch erreicht, dass im Unterteil auf der der Mündungsöffnung abgewandten Seite der Ringnut eine in axialer Richtung zur Mündungsöffnung hin offene umlaufende Nut ausgebildet ist, in die ein am Rand der Trennwand umlaufend ausgebildeter Wulst eingesetzt ist, auf dem bei zusammengebautem Gehäuse die Stirnwand der Mündungsöffnung des Oberteils in Anlage ist.A simple way of fastening the elastic partition in the housing is achieved in that in the lower part on the side facing away from the mouth opening An annular groove is formed in the annular groove, which is open in the axial direction towards the mouth opening and into which a bead is formed which is circumferentially formed on the edge of the partition wall and on which the end wall of the mouth opening of the upper part is in contact when the housing is assembled.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen

  • Fig.1 einen erfindungsgemässen Druckspeicher im Halbschnitt;
  • Fig.2 einen Teilschnitt des Druckspeichers nach Fig.1 vor der spanlosen Verformung;
  • Fig.3 einen Teilschnitt des Druckspeichers nach Fig.1 nach der spanlosen Verformung.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it
  • 1 shows a pressure accumulator according to the invention in half section;
  • 2 shows a partial section of the pressure accumulator according to FIG. 1 before the non-cutting deformation;
  • 3 shows a partial section of the pressure accumulator according to FIG. 1 after the non-cutting deformation.

Der in der Zeichnung dargestellte Druckspeicher weist ein Gehäuse auf, das aus einem Unterteil 1 und einem Oberteil 2 besteht. Im Bereich der zylindrischen Öffnung des Unterteils 1 ist in der Innenwand eine radial nach innen hin offene Ringnut 3 ausgebildet, deren Querschnitt im zusammengebauten Zustand des Gehäuses etwa rechteckig ist. Auf der der Mündungsöffnung des Unterteils 1 abgewandten Seite der Ringnut 3 ist die Innenwand als zylindrische Führung 4 ausgebildet, in die das Oberteil 2 mit einem an der Mündung seiner öffnung entsprechend ausgebildeten zylindrischen Rand 5 einsetzbar ist.The pressure accumulator shown in the drawing has a housing which consists of a lower part 1 and an upper part 2. In the area of the cylindrical opening of the lower part 1, a radially inwardly open annular groove 3 is formed in the inner wall, the cross section of which is approximately rectangular in the assembled state of the housing. On the side of the annular groove 3 facing away from the mouth opening of the lower part 1, the inner wall is designed as a cylindrical guide 4, into which the upper part 2 can be inserted with a cylindrical rim 5 which is formed at the mouth of its opening.

Das Ende der zylindrischen Führung 4 auf der der Ringnut 3 abgewandten Seite bildet gleichzeitig die radial äussere Seitenwand einer im Unterteil 1 in axialer Richtung zur Mündungsöffnung hin offenen umlaufenden Nut 6.The end of the cylindrical guide 4 on the side facing away from the annular groove 3 simultaneously forms the radially outer one Side wall of a circumferential groove 6 which is open in the lower part 1 in the axial direction towards the mouth opening.

Eine den Gehäuseinnenraum in einen Gasraum 9 und einen Flüssigkeitsraum 1o unterteilende elastische Trennwand 7 ist an ihrem Rand mit einem umlaufend ausgebildeten Wulst 8 versehen, der in die umlaufende Nut 6 des Unterteils 1 eingesetzt ist. Auf dem Wulst 8 ist die Stirnwand 11 der Mündungsöffnung des Oberteils in Anlage und hält diesen so in seiner Einbaulage in der Nut 6.An elastic partition 7 dividing the housing interior into a gas space 9 and a liquid space 10 is provided at its edge with a circumferential bead 8 which is inserted into the circumferential groove 6 of the lower part 1. The end wall 11 of the mouth opening of the upper part abuts on the bead 8 and thus holds it in its installed position in the groove 6.

Das Oberteil 2 ist im Bereich seiner zylindrischen Mündungsöffnung mit einem radial nach aussen hervorstehenden umlaufenden Ansatz 12 ausgebildet, dessen Querschnitt dem Querschnitt der Ringnut 3 bei zusammengebautem Gehäuse entspricht.The upper part 2 is formed in the region of its cylindrical mouth opening with a radially outwardly projecting peripheral projection 12, the cross section of which corresponds to the cross section of the annular groove 3 when the housing is assembled.

Die der Öffnung des Oberteils 2 entferntere Seitenfläche 13 des Ansatzes 12 ist hinterschneidungsartig radial nach innen geneigt.The side surface 13 of the extension 12 which is farther from the opening of the upper part 2 is inclined radially inward in the manner of an undercut.

Vor dem Zusammenbau des Gehäuses haben Ober- und Unterteil die in Fig.2 dargestellte Form. Dabei ist der Innendurchmesser des Unterteils 1 auf der der Öffnung abgewandten Seite der Ringnut 3 kleiner und auf der der Öffnung zugewandten Seite der Ringnut 3 grösser als der Aussendurchmesser des Ansatzes 12. Das ermöglicht, das Unterteil 2 bis zur Anlage der einen Seitenfläche 14 des Ansatzes 12 an der der Unterteilöffnung entfernteren Seitenwand 15 der Ringnut 3 in das Unterteil 1 einzuschieben.Before the housing is assembled, the upper and lower parts have the shape shown in FIG. The inner diameter of the lower part 1 is smaller on the side of the annular groove 3 facing away from the opening and larger on the side of the annular groove 3 facing the opening than the outer diameter of the extension 12. This enables the lower part 2 until one side surface 14 of the extension lies against the opening 12 on the side wall 15 of the annular groove 3 which is more distant from the lower part opening.

Der Querschnitt der Ringnut 3 ist vor dem Zusammenbau des Gehäuses so ausgebildet, dass er sich durch einen auf den Aussenumfang des Unterteils 1 im Bereich der Ringnut 3 einwirkenden Druck so verformt, dass er nach der Verformung dem Querschnitt des Ansatzes 12 entspricht. Dabei weist der auf das Unterteil 1 einwirkende Druck eine radial nach innen gerichtete und eine axial zur Unterteilöffnung hin gerichtete Komponente auf. Eine derartige Druckbeaufschlagung kann z.B. bei einem Ziehvorgang erreicht werden.The cross section of the annular groove 3 is formed before assembly of the housing so that it is through a the pressure acting on the outer circumference of the lower part 1 in the region of the annular groove 3 is deformed such that after the deformation it corresponds to the cross section of the extension 12. The pressure acting on the lower part 1 has a radially inwardly directed component and an axially directed component towards the lower part opening. Such pressurization can be achieved, for example, during a pulling process.

Nach dem Zusammenbau des Gehäuses durch Einschieben des Oberteils 2 in das Unterteil 1 und die kalte Umformung des Unterteils 1 im Bereich der Ringnut 3 umgreift die Ringnut 3 den Ansatz 12. Die Entlastung des Unterteils 1 vom Verformungsdruck führt zu einer Rückfederung des verformten Teils des Unterteils 1 in axialer und radialer Richtung. Da die Seitenfläche 13 des Ansatzes 12-radial nach innen geneigt ist und die Seitenwand 16 der Ringnut 3 zu einer entsprechenden Neigung verformt ist, bewirkt die radiale Rückfederung neben der axialen Rückfederung ebenfalls eine axiale Verspannung des Ansatzes 12 des Oberteils 2 in der Ringnut 3, so dass eine sichere und feste Verbindung der beiden Gehäuseteile 1 und 2 unter allen Betriebsbedingungen erreicht wird.After assembly of the housing by inserting the upper part 2 into the lower part 1 and the cold forming of the lower part 1 in the area of the annular groove 3, the annular groove 3 engages around the neck 12. Relieving the lower part 1 of the deformation pressure leads to a springback of the deformed part of the lower part 1 in the axial and radial directions. Since the side surface 13 of the shoulder 12 is inclined radially inwards and the side wall 16 of the annular groove 3 is deformed to a corresponding inclination, the radial springback also causes the shoulder 12 of the upper part 2 to be braced in the annular groove 3 in addition to the axial springback. so that a secure and firm connection of the two housing parts 1 and 2 is achieved under all operating conditions.

Da der Verformungsgrad des Unterteils 1 durch die erfindungsgemässe Ausbildung im Bereich der Ringnut 3 relativ gering ist, ist es zum einen möglich, grosse Wandstärken in dem zu verformenden Bereich vorzusehen, zum anderen können auch Werkstoffe wie Aluminium für das Gehäuse verwandt werden.Since the degree of deformation of the lower part 1 is relatively low due to the design according to the invention in the area of the annular groove 3, it is possible on the one hand to provide large wall thicknesses in the area to be deformed, and on the other hand materials such as aluminum can also be used for the housing.

Claims (5)

1. Druckspeicher mit einem Gehäuse, das aus einem Ober-und einem Unterteil besteht und dessen Innenraum durch eine elastische Trennwand in einen Gas- und einen Flüssigkeitsraum unterteilt ist, wobei das Oberteil bis zur Anlage an einem Anschlag in die zylindrische Öffnung des Unterteils eingeschoben und der Rand der zylindrischen Öffnung des Unterteils den Rand des Oberteils umgreifend spanlos verformt ist, dadurch gekennzeichnet, dass das Oberteil (2) im Bereich seiner Öffnung einen radial nach aussen hervorstehenden umlaufenden Ansatz (12) etwa rechteckigen Querschnitts hat, dass in der Innenwand des Unterteils (1) im Bereich der Öffnung eine radial nach innen offene Ringnut (3) ausgebildet ist, wobei vor dem Zusammenbau des Gehäuses der Innendurchmesser des Unterteils (1) auf der der öffnung abgewandten Seite der Ringnut (3) kleiner und auf der der Öffnung zugewandten Seite der Ringnut (3) grösser ist als der Aussendurchmesser des Ansatzes (12) des Oberteils (2), so dass das Oberteil (2) in das Unterteil (1) bis zur Anlage der einen Seitenfläche (14) des Ansatzes (12) an der der Unterteilöffnung entfernten Seitenwand (15) der Ringnut (3) einschiebbar ist und wobei der Querschnitt der Ringnut (3) vor dem Zusammenbau des Gehäuses derart ausgebildet ist, dass er durch auf den Aussenumfang des Unterteils (1) im Bereich der Ringnut (3) einwirkenden Druck mit einer radial nach innen gerichteten Komponente und einer axial zur Unterteilöffnung hin gerichteten Komponente dem Querschnitt des Ansatzes (12) angleichbar ist und im zusammengesetzten Zustand der Ansatz (12) des in das Unterteil (1) eingeschobenen Oberteils (2) in die Ringnut (3) eingreift.1. Pressure accumulator with a housing, which consists of an upper and a lower part and the interior of which is divided by an elastic partition into a gas and a liquid space, the upper part being pushed into the cylindrical opening of the lower part and resting against a stop the edge of the cylindrical opening of the lower part is deformed without cutting around the edge of the upper part, characterized in that the upper part (2) in the region of its opening has a radially outwardly protruding peripheral projection (12) of approximately rectangular cross-section, that in the inner wall of the lower part (1) a radially inwardly open annular groove (3) is formed in the area of the opening, the inner diameter of the lower part (1) being smaller on the side of the annular groove (3) facing away from the opening and on the side facing the opening before the housing is assembled Side of the annular groove (3) is larger than the outer diameter of the extension (12) of the upper part (2), so that the upper part l (2) can be inserted into the lower part (1) until one side surface (14) of the extension (12) abuts the side wall (15) of the annular groove (3) which is remote from the lower part opening, and the cross section of the annular groove (3) is in front the assembly of the housing is designed such that it acts on the outer circumference of the lower part (1) in the area of the annular groove (3) with a radially inward component and a component directed axially towards the lower part opening, the cross section of the shoulder (12) is adaptable and in the assembled state of the An set (12) of the upper part (2) inserted into the lower part (1) engages in the annular groove (3). 2. Druckspeicher nach Anspruch 1, dadurch gekennzeichnet, dass die der Öffnung des Oberteils (2) entferntere Seitenfläche (13) des Ansatzes (lo) hinterschneidungsartig radial nach innen geneigt ist.2. Pressure accumulator according to claim 1, characterized in that the side surface (13) of the extension (lo) which is more distant from the opening of the upper part (2) is inclined radially inward in the manner of an undercut. 3. Druckspeicher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass beim zusammengebauten Gehäuse der Innendurchmesser des Unterteils (1) zu beiden Seiten der Ringnut (3) etwa gleich ist.3. Pressure accumulator according to one of the preceding claims, characterized in that in the assembled housing, the inner diameter of the lower part (1) on both sides of the annular groove (3) is approximately the same. 4. Druckspeicher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Oberteil (2) an der Mündung seiner Öffnung mit einem umlaufenden zylindrischen Rand (5) ausgebildet ist, der in eine entsprechend ausgebildete zylindrische Führung (4) im Unterteil (1) auf der der Mündungsöffnung abgewandten Seite der Ringnut (3) einsetzbar ist.4. Pressure accumulator according to one of the preceding claims, characterized in that the upper part (2) is formed at the mouth of its opening with a circumferential cylindrical edge (5) which in a correspondingly formed cylindrical guide (4) in the lower part (1) the side of the annular groove (3) facing away from the mouth opening can be used. 5. Druckspeicher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass im Unterteil (1) auf der der Mündungsöffnung abgewandten Seite der Ringnut (3) eine in axialer Richtung zur Mündungsöffnung hin offene umlaufende Nut (6) ausgebildet ist, in die ein am Rand der elastischen Trennwand (7) umlaufend ausgebildeter Wulst (8) eingesetzt ist, auf dem bei zusammengebautem Gehäuse die Stirnwand (11) der Mündungsöffnung des Oberteils (2) in Anlage ist.5. Pressure accumulator according to one of the preceding claims, characterized in that in the lower part (1) on the side facing away from the mouth opening of the annular groove (3) is formed in the axial direction towards the mouth opening circumferential groove (6) into which an edge the elastic partition (7) is provided with a circumferential bead (8) on which the end wall (11) of the mouth of the upper part (2) is in contact when the housing is assembled.
EP19790101195 1978-08-05 1979-04-20 Pressure accumulator Expired EP0007970B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782834403 DE2834403C2 (en) 1978-08-05 1978-08-05 Pressure accumulator
DE2834403 1978-08-05

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EP0007970A1 true EP0007970A1 (en) 1980-02-20
EP0007970B1 EP0007970B1 (en) 1981-12-02

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Cited By (3)

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FR2476768A1 (en) * 1980-02-27 1981-08-28 Leduc & Fils Rene Stress reduced oleo-pneumatic pressure accumulator - has diaphragm gripped between two half shells clamped together by internally threaded outer sleeve
EP0035427A2 (en) * 1980-02-27 1981-09-09 Etablissements René Leduc & Fils (Société Anonyme) Method of making a prestressed accumulator and accumulator according to this method
WO2013071985A1 (en) * 2011-11-17 2013-05-23 Carl Freudenberg Kg Hydraulic accumulator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5311910A (en) * 1991-02-20 1994-05-17 Kabushiki Kaisha Showa Seisakusho Cap attachment structure for accumulator
DE19945107A1 (en) * 1999-09-21 2001-04-12 Otto Heat Heizungs-, Energie- Und Anlagentechnik Gmbh & Co. Kg Pressure vessel for gases or liquids under reduced pressure used in domestic heating and water systems is produced from magnesium alloy by die casting
DE102009021463A1 (en) 2009-05-15 2010-11-18 Hydac Technology Gmbh hydraulic accumulator
CN103206417A (en) * 2013-05-06 2013-07-17 布柯玛蓄能器（天津）有限公司 70MPa stainless steel diaphragm type energy accumulator

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DE1221864B (en) * 1960-11-30 1966-07-28 Langen & Co Pressure accumulator
FR2092208A5 (en) * 1970-04-22 1971-01-21 Joha Nv Tech Hande
DE1775111A1 (en) * 1968-07-06 1971-04-29 Jean Mercier Pressure vessel and method for fixed storage of its lid

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GB761143A (en) * 1952-12-19 1956-11-14 Ernst Weisse Method of and apparatus for reducing metal tube-ends in the manufacture of containers and bottles for compressed gases
DE1221864B (en) * 1960-11-30 1966-07-28 Langen & Co Pressure accumulator
DE1775111A1 (en) * 1968-07-06 1971-04-29 Jean Mercier Pressure vessel and method for fixed storage of its lid
FR2092208A5 (en) * 1970-04-22 1971-01-21 Joha Nv Tech Hande

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2476768A1 (en) * 1980-02-27 1981-08-28 Leduc & Fils Rene Stress reduced oleo-pneumatic pressure accumulator - has diaphragm gripped between two half shells clamped together by internally threaded outer sleeve
EP0035427A2 (en) * 1980-02-27 1981-09-09 Etablissements René Leduc & Fils (Société Anonyme) Method of making a prestressed accumulator and accumulator according to this method
EP0035427A3 (en) * 1980-02-27 1981-10-07 Etablissements Rene Leduc & Fils (Societe Anonyme) Prestressed accumulator
WO2013071985A1 (en) * 2011-11-17 2013-05-23 Carl Freudenberg Kg Hydraulic accumulator
CN103946558A (en) * 2011-11-17 2014-07-23 卡尔弗罗伊登伯格两合公司 Hydraulic accumulator
US9551360B2 (en) 2011-11-17 2017-01-24 Carl Freudenberg Kg Hydraulic accumulator

Also Published As

Publication number Publication date
DE2834403A1 (en) 1980-02-21
EP0007970B1 (en) 1981-12-02
DE2834403C2 (en) 1985-01-24

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