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《煤矿安全规程》第124条规定:“主要扇风机必须装有反风设施,必须能在10分钟内改变巷道中的风流方向。当风流方向改变后,主要扇风机的供给风量不应小于正常风量的60％……”。 为了达到上述要求,我国普遍采用反风道形式的反风设施。但它具有明显的缺点:建设和维护费用大,且工作不可靠。 矿用轴流式风机逆转反风,虽然省时、可靠,但在一般情况下,单台逆转反风量普遍低于正常风量的60％。新型矿用轴流式风机,为达到逆转风量超过正常风量的60％,
Article 124 of the Code of Coal Mine Safety stipulates: “The main fan must be equipped with anti-wind facilities and must be able to change the direction of the air flow in the roadway within 10 minutes.When the direction of the air flow changes, the supply air volume of the main fan should not be less than normal 60% of air volume ... ”. In order to meet the above requirements, anti-wind facilities in the form of anti-wind tunnels are commonly used in our country. However, it has the obvious disadvantage of being expensive to build and maintain and work unreliable. Mining axial fans to reverse the wind, although time-saving and reliable, but under normal circumstances, a single anti-reversing air volume generally lower than 60% of normal air volume. New mining axial flow fan, in order to achieve the reversal of air flow more than 60% of normal air volume,