这种电动滚筒也称为间接油冷式电动滚筒。电动滚筒内有一定的冷却油液，由于滚筒体不停地旋转，筒体上刮油板将油液不停地浇到电动机和齿轮上，带走电动机和齿轮工作时产生的热量，把热量传递到滚筒体壁上，加速电机散热，并对齿轮产生润滑作用。油冷式电动滚筒的关键是电动机内部不允许进入油液。
This kind of electric drum is also called indirect oil-cooled electric drum. There is a certain amount of cooling oil in the electric drum. Because the drum body rotates continuously, the oil scraper on the drum body pours the oil on the motor and gear continuously. It takes away the heat generated by the motor and gear when working, transfers the heat to the drum wall, accelerates the heat dissipation of the motor, and lubricates the gear. The key of oil-cooled electric drum is that oil is not allowed to enter the motor interior.