Screw Pump

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screw pump

[′skrü ‚pəmp]
(mechanical engineering)
A pump that raises water by means of helical impellers in the pump casing.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Screw Pump


a hydraulic machine whose working member is a screw; used for pumping liquids, including high-viscosity fluids. Screw pumps, also referred to as worm pumps, are a type of rotary pump. The screw pump housing contains a driving screw and one or two driven screws. The points of engagement of the screws travel longitudinally along the shaft during rotation, thus forcing out the volume of liquid contained between the turns. It is potential energy that for the most part is transmitted to the liquids, as a result of which there is a considerable increase in pressure within it.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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