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风机是煤矿的主要耗能设备之一,风机耗电约占矿井生产用电的20～60％。因此,如何改造风机,使风机的效率提高,适合老矿井的延伸;使风机的耗电量下降,以获得较好的经济效益。 2BY或70B_2系列轴流式风机的设计最高效率为70％,而实际运行效率一般都在65％以下。近年来很多矿井以扭曲型叶片更换了直叶片,风机效率有显著提高,年节电10万度以上。但由于钢板制机壳使用多年后变形大,有的达30mm,效率的提高受到了限制,
Fan is one of the main energy-consuming equipment in the coal mines, fan power consumption accounts for about 20 ~ 60% of mine production electricity. Therefore, how to rebuild the fan to improve the efficiency of the fan, suitable for the extension of the old mine; the fan power consumption decreased, in order to obtain better economic benefits. 2BY or 70B_2 series axial fan design maximum efficiency of 70%, while the actual operating efficiency is generally below 65%. In recent years, many mines have replaced straight blades with twisted blades, and their fan efficiency has been significantly improved, saving more than 100,000 kWh annually. However, due to the large deformation of steel chassis after many years of use, and some up to 30mm, increased efficiency has been limited,