矿用风表是测量矿井风速的一种重要工具,它的准确度将直接影响着矿井风量的正确供应。因此,必须对矿用风表作定期校正。目前,我国各地矿区都有风表校正设备,其中多数是旋臂式风表校正器。此种校正器存在着比较严重的离心力和伴随气流的问题。近年来,我们根据航空部门实验风洞的经验,设计制造了一个2.5米风洞用来校正中速 Mine wind meter is an important tool to measure the wind speed of mine, its accuracy will directly affect the correct supply of mine air volume. Therefore, mine winds must be regularly corrected. At present, all the mining areas around China have wind-meter calibration equipment, most of which are spiral-arm wind-meter calibrators. This type of corrector has the problem of severe centrifugal force and accompanying air flow. In recent years, we have designed and manufactured a 2.5-meter wind tunnel to calibrate medium-speed