| 摘要 |
A prime mover is provided particularly a wind energized prime mover (10) comprising a compressor (20) driven by a wind wheel (22) and arranged simultaneously to charge with compressed air, a first, small capacity reservoir (24) and a second, large capacity reservoir (26), the first reservoir (24) being connected to a compressed air demand and being rapidly charged and depleted in light winds when the compressor (20) is delivering just sufficient air to satisfy the demand and the second reservoir (26) being charged when the compressor (20) is delivering more air than is required, the requirement of the demand being determined by a pressure reducing valve 28 and the nature of the work done, the second reservoir (26) being connected to the demand line (35) across a pressure reducing valve (32) whereby the compressed air therein will be released to the demand when the pressure in the demand line (35) drops below a predetermined minimum. The compressed air demand shown is a pumping arrangement with a pneumatic ram, comprising a cylinder (16) and a piston (14), which is connected to the pull rod (15) of a borehole piston.
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