| 摘要 |
<p>PURPOSE:To absorb pulsation in high frequency and pulsation in low frequency by partition wall members having respective individual spring constants to reduce noise and vibration of a pump. CONSTITUTION:An accumulator 31 is roughly constituted of a closed vessel 32, a metallic bellows 33 dividing the inside of the closed vessel 32 into a first gas chamber G1 and a first oil chamber Y1, a large diameter holding tube 34 and an attaching tube 36 positioned inside of the first oil chamber Y1, and a metallic bellows 37 provided inside the attaching tube 36 and dividing it into a second gas chamber G2 smaller than the first gas chamber G1 and a second oil chamber. Moreover, as volume of respective gas chambers G1, G2 is set in relationship of G1>G2, high frequency pulsation of small amplitude is absorbed by the metallic bellows 37 of a large spring constant, and low frequency pulsation of a large amplitude is absorbed by the metallic bellows 33 of a small spring constant.</p> |
