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对大型转动设备(如4L-50/0.7真空压缩机)停运时,为避免主轴弯曲,一定要做到定时,按规定的角度进行盘车。这是因为停车时由于转子本身的自重、传动机件的质量以及传动带的张力,定向的长时间作用在主轴上,会使主轴弯曲。例如:已知有1台机泵的转子轴自重m_1=122kg,长l=1.2m,转子中部轴的直径d=0.11m,中部又装有两个叶轮,质量共为m_2=612kg,轴的材质是45钢。石油行业规定转速n=2960r/min的转轴中部的允许弯曲值f=0.05mm。求:转轴中部的最大挠度值y_(max)=y_(1max)+y_(2max)
For large rotating equipment (such as 4L-50 / 0.7 vacuum compressor) outage, in order to avoid bending the spindle, be sure to do the timing, according to the provisions of the steering angle. This is because the parking due to the weight of the rotor itself, the quality of the transmission parts and the tension of the belt, long-term orientation on the spindle, the spindle will be bent. For example, it is known that the weight of the rotor shaft of a single pump is m_1 = 122kg, the length of l = 1.2m, the diameter of the central shaft of the rotor d = 0.11m, and the center of the rotor is equipped with two impellers, Material is 45 steel. Oil industry provides speed n = 2960r / min in the middle of the shaft allowable bending value f = 0.05mm. Seeking: the maximum deflection in the central axis of the y_ (max) = y_ (1max) + y_ (2max)