An engine shaft running at 2.5r.p.s. is required to drive a machine shaft by means of a belt. The pulley on the engine shaft is of 5m diameter and that of the machine shaft is 2m diameter. If the belt thickness is 11mm.Determine the speed of the machine shaft, when 1. There is no slip 2. There is a slip of 4%
(i) An engine shaft running at 2.5r.p.s. is required to drive a machine shaft by means of a belt. The pulley on the engine shaft is of 5m diameter and that of the machine shaft is 2m diameter. If the belt thickness is 11mm.Determine the speed of the machine shaft, when
1. There is no slip
2. There is a slip of 4%
(ii) A cam, with a minimum radius of 25 mm, rotating clockwise at a uniform speed is to be designed to give a roller follower made of 20mm diameter at the end of a valve rod, motion described below : )
1. To raise the valve through 56 mm during 122° rotation of the cam by simple harmonic motion
2. To keep the valve fully raised through next 38°
3. To lower the valve during next 64° by uniform acceleration and retardation.
Determine the maximum velocity and acceleration of the valve rod when the cam shaft rotates at 108 r.p.m and write the remaining dwell angle.
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