Pressure storage reservoir for various hydraulic applications has gas space over piston separated from liquid space under piston by thin metal flexible bellows surrounding central core

摘要

The pressure storage reservoir (1) consists of two half-shells welded together. A central body (7) with an axial passage (8) for fluid has a concentric channel for hydraulic fluid. The fluid flows into a space (4) under a piston (6). The gas space (3) over the piston is separated from the liquid space under the piston by a thin metal flexible bellows (2) surrounding the central core. The bellows is sealed to the piston and to a flange on the core. A sealing ring (5) separates the liquid in the bellows from the axial passage when the piston is at its lowest position.