DME-II Online Assignment-2

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Problem-1


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Pb-1
A multi disk clutch consists of 7 steel plates and 6 bronze plates. The inner and outer diameter of friction disks are 61mm and 219mmrespectively. The co-efficient of friction is 0.1 and the intensity of pressure is limited to 0.3N/mm2. Assuming uniform pressure theory and wear theory. Calculate Power transmitting capacity at 515rpm


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Problem-2


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Pb-2
An automotive type internal expanding double shoe brake is shown in figure. The face width of the friction lining is 52mm and the maximum intensity of normal pressure is limited to 2N/mm2 . The co-efficient of friction is 0.32. The angle A1 can be assumed as zero.
Dimensions of the brake are given below.
A2 =112
R=106
d1=91
d2= 68
d3=50
Calculate operationg force P1 and P2.



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Designed by Dr. M. Raja Roy, Associate Professor, Mechanical Engineering Department