Hydraulic accumulator, in particular bellows accumulator

摘要

A bellows accumulator has a bellows (13) serving as a movable separating element between a gas side (11) and a fluid side (21). At the movable bellows end during expansion and contraction in the accumulator housing defining a longitudinal axis (9), a closure body (25) closes off the interior space (33) of the bellows (13) in a fluid-tight manner. At its other bellows end (27), the bellows is immovably fixed to the accumulator housing (1). The immovable bellows end (27) is fixed to an end body (31) fixed to the housing, which end body (31) is in the form of a disk with region (37) projecting axially into the interior (33) of the bellows (13) from the main plane (35) of the disk. At least one fluid passage (41, 43) is formed on the projecting region (37), which fluid passage (41, 43) connects the interior space (33) associated with the fluid side (21) to a fluid connection (17) of the accumulator housing (1).

主权项

1. A hydraulic accumulator, comprising:
an accumulator housing having a gas side and fluid side therein, defining a longitudinal axis and having a fluid connection on said fluid side; a movable bellows separating said gas side and said fluid side in said housing, said bellows having a closure body at a first end of said bellows closing an interior space of said bellows fluid-tight and defining said fluid side, said first end being movable in said housing in an axial direction along said longitudinal axis between expanded and contracted positions, a second end of said bellows being secured immovably relative to said housing by being secured on an end disk rigidly mounted in said housing, said end disk having a projecting region projecting axially into said interior space of said bellows from a main plane of said end disk, said projecting region defining a central plane extending perpendicularly and concentric to said longitudinal axis, said end disk having an inclined plane extending from and sloping away from said central plane to said main plane at an acute angle relative to said longitudinal axis defining a hollow space in a form of a truncated taper, said closure body engaging said central plane in the contracted position; and first fluid passages formed in said inclined plane and sloped toward said fluid connection at an acute angle relative to said longitudinal axis to connect said interior space with said hollow space and said fluid connection.