Seal air is injected into the labyrinth seals located at the main motor shaft (top and bottom) and at the pinion shaftdriving the motor.
密封空气被注入到主马达轴（顶部和下部）和驱动马达的齿轮轴的迷宫式密封里。
2
And the Fuzzy-follower is applied in shaftbottom coal conveyor of a medium-sized coal mine and gives good results. Thus, it solves the problem of power balance of double-motor driving system.