ACCUMULATOR

摘要

An accumulator installed in the piping of equipment and temporarily accumulating a pressure in a pipe flow path or absorbing, by a pump, the pulsation of a fluid pressure generating in the piping, wherein a bladder (3) is formed in a laminated structure having, for example, a center elastic layer (321), gas shielding layers (322) on the outside thereof, external elastic layers (323) on the outside of the gas shielding layers and the center elastic layer (321), gas shielding layers (322), and external elastic layers (323) are formed of polyamide resin, and the gas shielding layers (322) are formed so that the bending elastic modulus thereof is higher than the bending elastic moduli of the center elastic layers (321) and external elastic layers (323), whereby the durability of the bladder (3) against a repeated bending and stretching operation in the low temperature environment of 0 DEG or below can be increased and the volume of cushion gas in a gas chamber can be effectively prevented from decreasing.