Lm Description: 1, electric drum can be divided into three categories: air-cooled electric drum, oil-cooled electric drum, oil-filled electric drum 1) air-cooled electric drum which is characterized by electric drum motor without oil cooling , by conduction, radiation, convection and wind, can be divided into two kinds of forced air cooling and natural cooling. 2) oil-cooled electric drum this electric drum also called indirect oil-cooled electric drum. Drum motor has a cooling fluid, since the spinning roll body, scraper plate on the cylinder continuously poured into the oil motor and the gear on the motor and gear away the heat generated during the operation, the heat transmitted to the drum body wall, the motor accelerates cooling, and generates the gear lubrication. Oil-cooled electric drum key is allowed to enter the interior of the motor oil. 3) Oil-filled electric drum, also called direct oil-cooled electric drum, this type of electric drum to allow fluid to enter the interior of the motor, direct contact with the motor rotor and stator windings, will they work the body heat generated by continuously rotating drum is transmitted to the inner wall of the drum. The cooling effect of this structure is better, but the quality of the lubricant and the motor is relatively high requirements. 2, the working conditions: a) the ambient temperature is a 15 ℃, +40 ℃; 2) no more than 1000 meters above sea level; 3) transport of materials temperature does not exceed 60 ℃; 4) Voltage 380V, frequency 50Hz. 3, the electric belt conveyor roller as the driving force and upgrading equipment, widely used in mining, metallurgy, chemical, coal, building materials, electricity, food and transport sectors.