| 摘要 |
Known shear force pumps and turbines comprise a number of very thin, separately manufactured plates, mounted on a hollow spindle with spaces between each pair of adjacent plates. Apertures are provided in the wall of the spindle to allow a flow of fluid from the spindle interior to atmosphere or vice versa, via the spaces between the plates. The present invention obviates the separate plates, their spacers and the spindle by forming a corresponding part which is a continuous helix. The helix is formed by flanks 22 in a tubular body 10 mounted for rotation in a casing 16. By means of studs or bolts 32 (Fig 3) the helix is strengthened and its pitch may be adjusted. <IMAGE>
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