转子轴承下部与机壳的接触情况一般是检修中的盲区,通常是在制造厂把转子的轴心线调到机壳的中心线上时对其检查调整的,使用单位一般只在上部检查轴承紧力。本文通过分析发现并提出了一个新的故障源:转子一倍频振值渐增说明有可能是轴承下部接触不实。 The contact between the lower part of the rotor bearing and the housing is usually a blind spot in the maintenance, which is usually checked and adjusted when the manufacturer adjusts the axis line of the rotor to the centerline of the housing. The user usually checks the bearing only in the upper part Tight. This paper found through analysis and proposed a new source of failure: Rotor doubled frequency value shows that there may be contact with the lower part of the bearing is not real.