| 摘要 |
A self-priming centrifugal pump comprises a centrifugal impeller arranged in a pumping chamber for transferring liquid from an inlet to an outlet of the chamber, a diaphragm arranged downstream of the impeller for providing priming, and a drive means for driving the diaphragm with reciprocating motion during priming. The diaphragm and the drive means are arranged so that a pressure increase downstream of the impeller after priming causes a change in the neutral position of the diaphragm, which then causes disengagement of the drive means. The drive means may comprises a cam and cam follower arrangement or a crank and connecting arm arrangement.
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