3. An electric motor operates at 2880 RPM, driving an input shaft with input pulley of diameter 160 mm. The input pulley

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3 An Electric Motor Operates At 2880 Rpm Driving An Input Shaft With Input Pulley Of Diameter 160 Mm The Input Pulley 1 (67.82 KiB) Viewed 37 times

3. An electric motor operates at 2880 RPM, driving an input shaft with input pulley of diameter 160 mm. The input pulley couples with an output pulley of diameter 800 mm through a flat belt drive with coefficient of friction μ=0.18, and two idler pulleys of diameter 80 mm as shown in Figure 3. The centres of the output pulley and its closest idler pulley are at the same height, and the distance between them is given as 750 mm. (a) Determine the speed of the output pulley (RPM). (3 Marks) (b) The angle of lap for the input pulley is 180∘ by inspection. Determine the angle of lap for the output pulley by geometry and calculation. (8 Marks) (c) State which pulley will first start to slip in this configuration, giving the reasoning for your conclusion. (2 Marks) (d) Given that the drive system has an initial static tension of 825 N in the belt, calculate the maximum power that can be transferred at the given speed before the belt slips. Ignore the belt mass in the calculation. (12 Marks) (Total 25 Marks) Figure 3. Flat belt drive system.