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针对国内矿用防爆对旋抽出式风机使用中出现的Ⅱ级电动机隔流腔内冷却风流瓦斯浓度超限而存在的安全隐患问题,介绍了一种能够有效解决该问题的负压腔体,该腔体的结构特点、工作原理、设计计算及应用效果。实验表明,采用负压腔体能有效控制主风流道的含瓦斯风流进入Ⅱ级电动机隔流腔。
In view of the potential safety hazard of the gas concentration in the cooling airflow of the Ⅱ-class motor in the isolating cavity of the mine explosion-proof helical-pull fan, a negative pressure cavity which can effectively solve the problem is introduced Structural characteristics of the cavity, working principle, design and calculation and application results. Experiments show that the use of negative pressure chamber can effectively control the main wind flow of gas into the II class motor flow compartment.