| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the generation of extreme shrinkage of a bladder even in the case where a zero-down condition is generated in an accumulator, and improve the durability of an accumulator by providing a spherical projecting porous wall in an opening on the shell inside of a fluid flow passage. SOLUTION: In an accumulator, a gas chamber 6 is filled with the gas at the predetermined pressure, and while a liquid chamber 5 is connected to a water supply pipeline or the like through a liquid flow passage 2 so as to absorb the pulsation to be generated in the water supply pipeline. At this stage, since a spherical projecting porous wall 10 is provided in an opening on the inside of a shell 1 of the fluid flow passage 2, a bag-like bladder 3 is gradually shrunken along the porous wall 10, and during this shrinking operation, the bladder 3 gradually seals multiple hole 11a, which are provided in the porous wall 10, from a peripheral side thereof. Consequently, opening area of the flow passage is gradually reduced and discharge flow is reduced at a point near zero-down, and extreme shrinkage of the bladder 3 can be restricted. Generation of fatigue of the bladder in the early time is prevented so as to improve the durability.</p> |
