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fluid coupling |
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fluid coupling [¦flü·əd ¦kəp·liŋ]
(mechanical engineering) A device for transmitting rotation between shafts by means of the acceleration and deceleration of a fluid such as oil. Also known as hydraulic coupling. Fluid coupling A device for transmitting rotation between shafts by means of the acceleration and deceleration of a hydraulic fluid. Structurally, a fluid coupling consists of an impeller on the input or driving shaft and a runner on the output or driven shaft. The two contain the fluid (see illustration). Impeller and runner are bladed rotors, the impeller acting as a pump and the runner reacting as a turbine. Basically, the impeller accelerates the fluid from near its axis, at which the tangential component of absolute velocity is low, to near its periphery, at which the tangential component of absolute velocity is high. This increase in velocity represents an increase in kinetic energy. The fluid mass emerges at high velocity from the impeller, impinges on the runner blades, gives up its energy, and leaves the runner at low velocity. See Hydraulics How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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? Mentioned in | ? References in periodicals archive | |
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RAM NDT is a dry test, eliminating the need for fluid coupling and cleaning and preventing potential rest contamination. The action from a fluid coupling is produced by transferring power through a self-contained, liquid medium rather than through the physical engagement of a gear of other component. The point at which the blood, acting as a fluid coupling, causes the second plate to spin determines the viscosity. |
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