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当前我国煤矿使用的通风机有相当数量是50年代仿苏产品,例如BY型和70B2型通风机的效率只有70％。因此改造旧风机,提高风机运行效率对节约能源具有重要意义。近几年来,有不少矿井将轴流通风机换上北票四型扭曲叶片,虽有一定的效果,但因为不是对口设计,效率只提高5％左右。也有的矿井将旧风机换成新型高效风机。新风机主要是K58型。一、矿井轴流通风机技术改造的措施 1.改变风机的叶列系统如果矿井的风压较小,可改变高效区的位置,使风机在高效区工作。对7082—11型风机来说,可去掉前导叶;对7082—21型风
At present, a considerable number of ventilators used in coal mines in our country are fake Soviet-made products in the 1950s. For example, the efficiency of ventilators of type BY and type 70B2 is only 70%. Therefore, the transformation of the old fan, fan operation to improve energy efficiency is of great significance. In recent years, many mine shafts will be replaced by four-axial fan axial distortion of the four leaves, although a certain effect, but because it is not the counterpart design, efficiency increased by only about 5%. Some mines will be replaced by the old fan new high efficiency fan. The new fan is mainly K58 type. First, mine shaft ventilation fan technological transformation measures 1. Change the fan leaf column system If the mine pressure is small, you can change the location of high-efficiency zone, the fan work in the high-efficiency zone. For Model 7082-11 fans, the leading leaves can be removed; the 7082-21 type wind