传动卷筒式地下卷取机 centre-driven mandrel type down-coiler
它由电动机、传动机构和卷筒或链轮组成，分为钢丝绳和环链两种。
It consists of motor, drive mechanism and the drum or sprocket composition, divided into two types of wire rope and chain.
电缆卷筒的改造原因，新卷筒的设计，卷筒传动及输出轴强度的计算，改造后的效果评价。
Reasons for crane cable reel rebuilding are given with the new design, calculation of reel transmitting and the strength of output. The result of rebuilding is got.
针对卷筒材料放卷系统的张力控制问题，探讨了一个基于交流传动的速度控制规律。
Aiming to control the tension of roll out system, the rule of speed control based on AC driving is discussed.
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