A belt conveyor system is arranged as shown in Fig . 1 to transport trays . The top side of the conveyor is supported by a steel plate to prevent sag of the belt . The belt is driven by the drum BH from the motor M through two V - belt reductions . These two speed reductions are equal . Assuming the data given below : Conveyor belt speed : 0.508 m / s Weight of each tray : 3.63 kg Maximum spacing of trays on belt : 0.508 m Diameter of conveyor drum BH : 0.254 m Motor speed : 870 rpm Mechanical efficiency : 90 % Supporting plate : 9.144 m Fig . 1 Determine the class of induction motor and its maximum horsepower to be specified . Design and calculate shafts with suitable diameter ( shape design ) . Determine the number and location of supporting bearings . Calculate and select appropriate bearings for 5 years life and 12 hours work per day . Design and select a V - belt system to drive the drive shaft . Design a gear chain ( with 4 gears ) for speed reduction instead of V - belts , determine and calculate the gears ( a sketch for recommendation shown in Fig . 2 ) . Design an appropriate brake system that is placed on BH . Draw the exact CAD drawing of machine elements and assembled machine . Select and design appropriate couplings and joints . Use tolerances as needed . Try to give a rough estimate of the final price of the design .
