在一些粮食加工厂,电动机通电后通过绷紧的皮带带动磨面机、脱米机工作.电动机上有固定轴的轮子叫做主动轮,磨面机、脱米机上有固定轴的轮子叫做从动轮.在皮带传动中,两轮转动方向相同,但所受皮带的摩擦力方向却截 In some grain processing plants, after the motor is energized, the tense belt drives the grinding machine and the rice dewatering machine. The wheels with the fixed shaft on the motor are called the driving wheels. The wheels with the fixed shaft on the grinding machine and the dewatering machine are called the driven wheels. In the belt drive, the two wheels rotate in the same direction, but the direction of the friction of the belt is cut.