对旋轴流式局部通风机为双电机、双叶轮结构 ,它可根据掘进工作面长度和巷道的通风要求选用单级单车或双级对旋运行。该机具有风压大、效率高、噪音低等特点 ,目前在煤矿中已得到普遍应用。对旋轴流式局部通风机 ,虽然因故障有一级停止运转时 ,短期内不致于马上造成工作面瓦斯 The counter-rotating axial fan is a dual-motor, double-impeller structure that can be operated with a single-stage bicycle or two-stage counterrotation according to the length of tunneling face and ventilation requirements of roadway. The aircraft has a large wind pressure, high efficiency, low noise characteristics, the coal has been widely used. Rotary axial flow fan, although due to failure to stop a level, the short term will not result in immediate face gas