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一、前言我国煤矿抽风机的反风设计,历年来不外两种:即小型抽风机选用异步电动机拖动,采用电动机反转反风,大型抽风机选用同步电动机拖动,采用反风道反风。能否从这两种设计中扬长避短,对大型抽风机选用同步电动机拖动的也采取反转反风?则是有待研究的课题,我矿作了初步的实验。打通一矿是一个沼气突出的矿井,1970年简易投产,设计年生产能力60万吨,边界抽出式通风,选用苏制B-2.8轴流式抽风机两台,有效风量52～160M~3/S,二级
I. Introduction The anti-wind design of coal mine exhaust fan in our country has had no difference over the years. There are two kinds of anti-wind design in the coal mine exhaust fan in our country. For example, the small draft fan adopts the asynchronous motor to drag, the motor to reverse the wind, the large draft fan to use the synchronous motor to drag, wind. Can both avoid weaknesses from the two designs, the selection of large exhaust fan synchronous motor drag also take reverse wind? It is the subject of research, mine made a preliminary experiment. One ore mined up is a mine with prominent biogas. The plant was put into operation in 1970. The designed annual production capacity is 600,000 tons. The boundary is ventilated at the boundary. Two Su-type B-2.8 axial-flow suction fans are used. The effective air volume is 52-160 M ~ 3 / S, two