众所周知,就旋转机械而言,振动是固有的,甚至设备处于最好状态下,由于一点小缺陷也会发生振动;当振动增大或过份时,往往反映设备存在某些机械故障;而且不同的机械缺陷引起不同方式的振动。如不平衡可引起频率等于零件转速的径向(水平或垂直方向)振动;不同心度引起频率为1—3倍 It is well-known that in the case of rotating machinery, vibrations are inherent, even when the equipment is in the best condition, vibrations occur due to minor imperfections; when the vibrations are increased or exceeded, there is often some mechanical failure of the equipment; and different Mechanical defects cause different modes of vibration. Such as unbalance can cause the frequency equal to the radial speed (horizontal or vertical direction) of the part speed vibration; different concentricity causes the frequency is 1-3 times