The analysis and test on rotating fan are made to specify the counter rotating efficiency of diffuser tube with diffuser tube(tower),silencer and collector is lower 50% than YB2F(JBT) series.

• 通过对矿用对旋式通风机的分析试验研究,阐明了带扩散筒-塔和带消声器扩散筒与集流器的对旋效率比JBT型低50%25左右。