| 摘要 |
A pulsation damper includes a housing which bounds an internal space and two substantially coaxial openings at opposite axial ends thereof. A movable wall sealingly subdivides the internal space of the housing into a fluid-containing compartment which is supplied with the fluid whose pulsations are to be damped through one of the openings, and a gas-containing compartment which communicates with the other opening. An actuating rod is connected to the movable wall for joint movement therewith and has an extension portion which extends into the other opening and has an annular recess and forms a sealed interface with the surface bounding the other opening. Two annular channels open onto such surface at axial spacings from the recess in an equilibrium position of the movable wall. The channel that is closer to the gas-containing compartment communicates with a discharge conduit, while the other channel is permanently supplied with pressurized gaseous medium, so that when the movable wall is axially displaced out of the equilibrium position by more than a predetermined distance away from and toward the other opening, communication is established between the recess and the respective channel and the pressure in the gas-containing compartment is respectively increased and relieved through a conduit system that extends in the actuating rod between the gas-containing compartment and the recess. The channels are provided in respective inserts sealingly received in enlarged passage portions of the housing.
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