| 摘要 |
A self priming pump system comprises a pump having a pump chamber 110, a pump drive 116 and a vacuum generator 118,120. An inlet of the vacuum generator is connected to an enclosed volume or priming chamber 16 of the pump system via a conduit or priming duct 134. The enclosed volume is coupled to the pump chamber. The conduit comprises a valve 122 for interrupting a vacuum generated by the vacuum generator. The pump drive is selectively engageable, for example by a clutch 128, with the vacuum generator for driving the vacuum generator. The vacuum generator may comprise a venturi pump 120 and a compressor 118. The valve may be a breather valve which has a selectively openable vent to the atmosphere. A fluid probe may be used for measuring a fluid level within the enclosed volume. The valve may be operable and/or the pump drive may be selectively disengageable from the vacuum generator in response to the fluid probe measuring a predetermined fluid level. A control system may be provided to control the breather valve and the engagement of the pump drive with the vacuum generator. |
