| 摘要 |
A pulsation dampener (10) for pipes or machines (100) has an outer pipe (11) and a co-axial inner pipe (23) which defines a cushion chamber (24). A nozzle plate (27), between the inlet (17) and the cushion chamber (24) has a central nozzle (28) surrounded by a plurality of passages (29), the latter allowing flow from the inlet (17) through an annular upper chamber (25) to the outlet (24). When the pressure at the inlet (17) greatly exceeds the pressure at the outlet (21), a jet of fluid through the nozzle (28) is sprayed into the cushion chamber (24) and minute quantities of entrained air are released to compensate for air entrained from the air pocket in the cushion chamber (24) so that the fluid level (L) in the cushion chamber (24) will oscillate about a substantially constant level. |
