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目前国内矿井使用的轴流式通风机多数是采用“BY”或70B_2型,据不完全统计约有1400多台。这种风机是仿苏40和50年代的老产品,采用不扭曲风叶,运行效率一般在60%左右,电耗较高,几年来对该型式风机进行技术改造。改造的途径主要是将原来的不扭曲风叶换为扭曲风叶和调整风叶与机壳的径向间隙。巳改造的风机运行效率和节电情况,都收到了较好的效果,如表1中所例举的有关煤矿扭曲风叶节电情况,一般都在
At present, the majority of axial fans used in domestic mines use “BY” or 70B_2 type, according to incomplete statistics, there are about 1,400 units. This fan is imitation Su 40 and 50’s old products, the use of non-twisted leaves, the operating efficiency is generally about 60%, high power consumption, the fan over the past few years to carry out technical transformation. The main way to transform is to change the original non-twisted blades into twisted blades and adjust the radial clearance between the blades and the chassis. Has been modified fan operating efficiency and power-saving situation, have received good results, as shown in Table 1, the coal-fired twisters on the energy-saving situation, are generally