1. A multiple friction clutch is required to transmit 89.52 kW at 3000 rpm. The plates are alternatively of steel and phosphor bronze and they run in oil. The coefficient of friction is 0.08. The internal radius of the friction surface is 0.8 times the radius of the external surface. The axial pressure is limited to 20 x 104 N/m2 . If the maximum diameter of the frictional surface is not to exceed 250 mm, determine the number of plates required.

1. A multiple friction clutch is required to transmit 89.52 kW at 3000 rpm. The plates are alternatively of steel and phosphor bronze and they run in oil. The coefficient of friction is 0.08. The internal radius of the friction surface is 0.8 times the radius of the external surface. The axial pressure is limited to 20 x 104 N/m2 . If the maximum diameter of the frictional surface is not to exceed 250 mm, determine the number of plates required.

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 7.76P: The clutch described in Prob. 7.75 is to transmit a torque of 120lbft when the total spring force...

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