| 摘要 |
The present invention concerns a membrane pump having a hydraulic chamber (8) separated from a pumping chamber (9) by a membrane (1), wherein the pumping chamber (9) is respectively connected with a suction connection and a pressure connection and a pulsating working fluid pressure can be applied to the hydraulic chamber (8) which can be filled with a working fluid, wherein the hydraulic chamber (8) is connected to a working fluid reservoir (15) via a leakage compensation valve (6), wherein the leakage compensation valve (6) comprises a closing body which is held in a closed position with the aid of a pressure element and which can be moved to and fro between closed and opened valve gate positions, wherein the pressure element is designed such that when the pressure in the hydraulic chamber (8) is lower than a set pressure pL, the closing body (16) moves in the direction of the open position. In order to provide a membrane pump with an improved a leakage compensation valve, the invention proposes that the mass of the closing body is large enough for the closing body to move by no more than 0.2 mm in the direction of the open position when a drop in pressure to 0 bar which lasts no longer than 1 millisecond occurs as a result of a pressure pulse in the hydraulic chamber (8). |
