| 摘要 |
An irrigation pump for use in irrigating small fields or supplementing larger irrigation systems can also be used for portable water supply for emergency, military, or for underdeveloped countries. The pump system is designed to be light-weight and semi-portable and can be powered with a small engine or electric motor. The apparatus uses a down well impeller that is driven by a flexible vertical shaft and a vertical shaft motor drive or engine. The pump impeller incorporates its own thrust and journal bearings for the pump shaft. The bearings are water lubricated. The main drive shaft is flexible and elongated and is supported over its entire length with a flexible shaft guide sleeve. The flexible drive shaft is surrounded by a convoluted well pipe so that the drive shaft and the well pipe can be removed from the well casing bore as a unit and then coiled for storage. The drive shaft accepts couplings at each end and a seal at its upper end. The outlet fitting and flexible pipe with pump attached can be packaged around an engine that is bolted to the outlet fitting. A flange on the outlet fitting can be used to bolt the entire assembly of engine and outlet fitting to the well head at a well casing flange. That entire assembly of outlet fitting, engine (or motor), well pipe, drive shaft and impeller can be removed as a unit from the well casing by simply unbolting the outlet fitting from the casing.
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