Bellows accumulator

A bellows accumulator, comprising:

• an accumulator housing having a gas space and a fluid space with a fluid port and a concave inner contour adjacent the fluid port;
• a separating bellows being movably arranged in the accumulator housing, having a plurality of bellows folds and separating the gas and fluid spaces from one another, a stationary open end of the separating bellows being fixed to the accumulator housing by a securer, a movable end of the separating bellows being opposite the stationary open end;
• a closure part being coupled to the movable end of the separating bellows, having a guide guiding movement of the closure part in the accumulator housing and having a seal separating fluid communication of a portion of the fluid space with the bellows folds from the fluid port in an extended end position of the separating bellows and opening fluid communication in at least some other positions of the separating bellows in the accumulator housing;
• and
• a shoulder extending radially inwardly from the accumulator housing into the fluid space, the guide engaging the shoulder in the extended end position of the separating bellows, the shoulder having a slope tapering in a direction away from the fluid port between the guide and the seal in the extended end position.

A bellows accumulator, comprising:

• an accumulator housing having a gas space and a fluid space with a fluid port and a concave inner contour adjacent the fluid port;
• a separating bellows being movably arranged in the accumulator housing, having a plurality of bellows folds and separating the gas and fluid spaces from one another, a stationary open end of the separating bellows being fixed to the accumulator housing by a securer, a movable end of the separating bellows being opposite the stationary open end;
• and
• a closure part being coupled to the movable end of the separating bellows, having a guide guiding movement of the closure part in the accumulator housing and having a seal separating fluid communication of a portion of the fluid space with the bellows folds from the fluid port in at least one extended position of the separating bellows when the seal engages a shoulder extending radially inwardly from and fixed on the accumulator housing and opening the fluid communication in at least some other positions of the separating bellows in the accumulator housing when the seal is disengaged with the shoulder, the seal being arranged between the guide and a dome on the closure part.

A bellows accumulator, comprising:

• an accumulator housing having a gas space and a fluid space with a fluid port and a concave inner contour adjacent the fluid port;
• a separating bellows being movably arranged in the accumulator housing, having a plurality of bellows folds and separating the gas and fluid spaces from one another, a stationary open end of the separating bellows being fixed to the accumulator housing by a securer, a movable end of the separating bellows being opposite the stationary open end;
• a closure part being coupled to the movable end of the separating bellows, having a guide guiding movement of the closure part in the accumulator housing and having a seal separating fluid communication of a portion of the fluid space with the bellows folds from the fluid port in at least one extended position of the separating bellows and opening fluid communication in at least some other positions of the separating bellows in the accumulator housing;
• and
• a shoulder extending radially inwardly from and fixed on an inner surface of the accumulator housing into the fluid space having an end surface facing away from the fluid port and having an inwardly facing side surface, the end surface being engaged by the guide in an extended end position of the separating bellows, the seal engaging the side surface in the extended end position of the separating bellows.