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七十年代以来,我国矿井的平均年产量及矿井深度均有大幅度的增加。因此,具有一系列优点的多绳摩擦提升系统,获得了较为广泛的应用。《煤炭建设项目成套设备》明文规定:年产量在90万吨以上的主井、年产量在60万吨以上的副井,一律采用多绳摩擦提升系统。此外,也还规定:除年产量超过150万吨且井深超过700米的提升机可采用直流拖动,其他应采用交流感应电动机拖动。若电机容量超过一千千瓦时,可选用同容量的双机拖动。因此,给出交流拖动多绳摩擦提升系统电机转子电阻计算的简便、准确方法,供设计部门及现场参考使用,是有一定现实意义的。
Since the seventies, the average annual output of mine and mine depth have increased significantly. Therefore, a series of advantages of multi-rope friction lifting system, has been more widely used. “Complete sets of equipment for coal construction projects,” expressly provides: annual output of more than 900,000 tons in the main shaft, the annual output of more than 600,000 tons of auxiliary wells, will be used multi-rope friction lifting system. In addition, it also provides: In addition to the annual output of more than 1.5 million tons and depth of more than 700 meters of the hoist can be DC drag, the other should be used AC induction motor drag. If the motor capacity of more than one thousand kilowatts, you can choose the same capacity double drag. Therefore, it is of practical significance to give a simple and accurate method for calculating the rotor resistance of AC drag multi-rope friction hoisting system for design department and on-site reference.