与滚动联轴器相比，滚珠联轴器的传动效率低，容易磨损破坏，维修相对困难。
Compared with the rolling coupling, the roller coupling has such deficiency as easy to be worn, a low transmission efficiency and difficult to be maintained.
安装在主机顶部的减速机，通过联轴器连接中心轴旋转，中心轴带动磨辊吊架旋转，磨辊装在吊架上沿磨环内周一起滚动。
The speed reducer upper on the main machine makes central axis rotate through shaft coupling and roller hanger rotates with central axis and rollers on the hanger roll around the inside of ring.
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