Hydraulic accumulator
AssigneeHydac Technology GmbH
InventorsPeter Kloft, Torsten Kusserow, Norbert Lange, Norbert Weber, Armin Kort
Life of this patent
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Abstract
The disclosure relates to an hydraulic accumulator, in particular a diaphragm accumulator, having an accumulator housing and a separating element disposed therein, which separates two media spaces from each other, wherein a weld seam is formed by a laser or electron beam welding process without any filler materials, in that at least a part of the wall parts delimiting the transition point are melted to form the weld seam, which closes off the transition point towards the surroundings, in a manner that is free of protrusions with respect to an outer circumferential surface of a connection element.
Claims25
A hydraulic accumulator, having an accumulator housing and a separating element disposed therein, which separates two media spaces from each other, wherein the accumulator housing has at least one fluid port which opens out into an adjacent media space and which has a connection element having an annular outer circumferential surface and a fluid passage bore, which connection element is connected to the accumulator housing via a weld seam, which weld seam forms a transition point between the accumulator housing and the connection element at an end face of the connection element;
- wherein
- the weld seam is formed by a laser or electron beam welding process without any filler materials;
- wherein
- at least a part of wall parts delimiting the transition point are melted to form the weld seam, which closes off the transition point towards surroundings in a manner that is free of protrusions with respect to the outer circumferential surface of the connection element;
- wherein
- the outer circumferential surface of the connection element transitions into a circumferential rim;
- and wherein
- a depression is formed in the end face of the connection element, extending from the circumferential rim to the fluid passage bore.
A connection element for a hydraulic accumulator, comprising at least one connector and one connection part for the purpose of connecting a fluid line or for producing a welded seam connection, respectively;
- wherein the connection part has, on its free end face facing away from the connector, a depression, which depression extends from an outer-circumferential rim to a fluid passage bore, which fluid passage bore passes through the connector and connection part.
A method for producing a welded joint in a hydraulic accumulator, comprising applying a laser or electron beam between a connection element and an adjacently disposed accumulator housing at right angles and circumferentially to the rim of the connection element adjacent to the accumulator housing or to a transition area between this rim and parts of the adjacently disposed accumulator housing, wherein the connection element comprises a depression extending from an outer-circumferential rim to a fluid passage bore.
A hydraulic accumulator, having an accumulator housing and a separating element disposed therein, which separates two media spaces from each other, wherein the accumulator housing has at least one fluid port which opens out into an adjacent media space and which has a connection element having an annular outer circumferential surface and a fluid passage point, which connection element is connected to the accumulator housing via a weld seam and which forms a transition point when placed on the accumulator housing at the end face;
- wherein
- the weld seam is formed by a laser or electron beam welding process without any filler materials, so that at least a part of wall parts delimiting the transition point are melted to form the weld seam, which weld seam closes off the transition point towards the surroundings in a manner that is free of protrusions with respect to the outer circumferential surface of the connection element;
- and wherein
- a depression forms a slightly inclined annular cone having an inclination of 4° to 10°.
A hydraulic accumulator, having an accumulator housing and a separating element disposed therein, which separates two media spaces from each other, wherein the accumulator housing has at least one fluid port which opens out into an adjacent media space and which has a connection element having an annular outer circumferential surface and a fluid passage point, which connection element is connected to the accumulator housing via a weld seam, which weld seam forms a transition point between the accumulator housing and the connection element at an end face of the connection element;
- wherein
- the weld seam is formed by a laser or electron beam welding process without any filler materials;
- wherein
- at least a part of wall parts delimiting the transition point are melted to form the weld seam, which closes off the transition point towards the surroundings in a manner that is free of protrusions with respect to the outer circumferential surface of the connection element;
- wherein
- the outer circumferential surface of the connection element transitions into a circumferential rim;
- wherein
- a depression is formed in the end face of the connection element, extending from the circumferential rim to the fluid passage point;
- wherein
- a course of the depression in the connection element is adapted to a curved accumulator housing wall, which engages at least partially with the depression and which encompasses a further fluid port, in particular for the passage of a working gas, and wherein
- the depression forms a slightly inclined annular cone having an inclination of 4° to 10°.
A hydraulic accumulator, having an accumulator housing and a separating element disposed therein, which separates two media spaces from each other, wherein the accumulator housing has at least one fluid port which opens out into an adjacent media space and which has a connection element having an annular outer circumferential surface and a fluid passage point, which connection element is connected to the accumulator housing via a weld seam, which weld seam forms a transition point between the accumulator housing and the connection element at an end face of the connection element;
- wherein
- the weld seam is formed by a laser or electron beam welding process without any filler materials;
- wherein
- at least a part of wall parts delimiting the transition point are melted to form the weld seam, which closes off the transition point towards surroundings in a manner that is free of protrusions with respect to the outer circumferential surface of the connection element;
- wherein
- the outer circumferential surface of the connection element transitions into a circumferential rim;
- wherein
- a depression is formed in the end face of the connection element, extending from the circumferential rim to the fluid passage;
- wherein
- wherein the depression forms a slightly inclined annular cone having an inclination of approximately 6°.
Dependencies are inferred from the claim text.