DieselShip's Online Content Library

Q1. A winch motor drives a pinion with 320 teeth, and friction at the motor bearings is constant at 18 Nm. The pinion then meshes with a gear wheel having 960 teeth which drives a shaft of 140 mm diameter. This shaft is supported in bearings having a coefficient of friction of 0.1 and drives a winch drum of diameter 380 mm. Calculate EACH of the following:

(a) The driving torque required by the motor when raising a mass of 2 tonnes at steady speed;

(b) The input power required by the motor when raising the load in Q3 (a) at a steady speed of 0.2 m/s if the motor efficiency is 88%.