mech 153 - assignment 3

Chain Drives

Question 1

A tumbler barrel is to be driven at approximatelly 40 RPM by a speed reducer powered by a 5 hp electric motor.  The reducer output speed is 100 RPM and the output shaft is 1.75 inches in diameter.  The shaft diameter of the tumbling barrel is 2 inches.  The shaft centre distance is approximetelly 36 inches.  Select a single chain to form the drive connection of the speed reducer that can operate in heavy shock conditions.

Question 2

Repeat Question 1 but this time specify a double chain arrangement to form the drive connection of the speed recducer.

Question 3

The head shaft of an apron conveyor, which handles rough castings from a shakeout, operates at 66 RPM and is driven by a gear motor whose output is 5.6 kW at 100 RPM.  the head shaft has a 50 mm diameter and the gear motor shaft has a 44 mm diameter.  Shaft centre distance should not exceed 1055 mm.  Specify a 3 chain arrangement that will make this system work under moderate shock conditions.