Science for Engineering by Bird John

Author:Bird, John [Bird, John]
Language: eng
Format: azw3, epub
ISBN: 9781317575047
Publisher: Taylor and Francis
Published: 2015-09-06T16:00:00+00:00

27.5 Power transmission and efficiency

A common and simple method of transmitting power from one shaft to another is by means of a belt passing over pulley wheels which are keyed to the shafts, as shown in Figure 27.6. Typical applications include an electric motor driving a lathe or a drill, and an engine driving a pump or generator.

Figure 27.6

For a belt to transmit power between two pulleys there must be a difference in tensions in the belt on either side of the driving and driven pulleys. For the direction of rotation shown in Figure 27.6, F2 > F1

The torque T available at the driving wheel to do work is given by:

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