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近年来,局部通风机领域出现了一种明显的趋势,即对大功率局部通风机的需求日益高涨。据苏联统计,1970～1980年间,巷道断面平均增加了1/3,巷道长度500m以上者占总数的30％,1000m以上者增至总数的10％,平均达450m;采准巷道的瓦斯逸出量增长了40％。现在,掘进工作面新风需要量平均为130m~8/min。为此,就必须增加通风机风量及其驱动功率。例如,现代防爆通风机风量,法国达235m~3/min、英国达
In recent years, there has been a clear trend in the field of local ventilators, that is, the demand for high-power local ventilators is on the rise. According to Soviet statistics, between 1970 and 1980, the cross section of tunnels increased by an average of 1/3, the length of roadways over 500m accounted for 30% of the total, and those over 1000m increased to 10% of the total with an average of 450m; Volume increased by 40%. Now, the average amount of fresh air required for heading face is 130m ~ 8 / min. To this end, we must increase the fan air flow and its driving power. For example, the modern explosion-proof fan air volume, the French up to 235m ~ 3 / min, the British up