100 kW is transmitted at 3000 rpm by a multiple disc friction clutch. The plates in oil and have the friction surface of steel and phosphor bronze alternately, µ = 0.07 and the axial intensity of pressure is not to exceed 1.5 bar. External radius is 1.25 times the internal radius, and the external radius is 12.5 cm. Determine the number of plates needed to transmit the required torque. Assume uniform wear.

100 kW is transmitted at 3000 rpm by a multiple disc friction clutch. The plates in oil and have the friction surface of steel and phosphor bronze alternately, µ = 0.07 and the axial intensity of pressure is not to exceed 1.5 bar. External radius is 1.25 times the internal radius, and the external radius is 12.5 cm. Determine the number of plates needed to transmit the required torque. Assume uniform wear.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.70P: Solve Sample Problem 7.16 if the contact pressure under the polisher varies parabolically from p0 at...

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