辨识主轴转子系统能量传递特性的矢量匹配平衡方法研究

In order to suppress the vibration caused by the imbalance of a spindle rotor system, and to overcome the low efficiency of the conventional dynamic balancing method, the dynamic model of a spindle rotor system was established by using the finite element method. The model was modified by the modal test experiment and the identification of the structural parameters of the rotor system was realized, taking the 180SD35Q15 high-speed grinding spindle as the research object.It is proved that the influence coefficient is determined by the rotor structure parameters which can reflect the energy transfer characteristics of the rotor system. Using the principle of vector synthesis to match the weight, the weight and phase can be quickly and accurately obtained. The experimental results of the vector matching balance method were compared with those of the influence coefficient method. The results show that: the amplitude at the running frequency is reduced by 64.85%, 49.57% and 60.59% at the speed of 15 000 r/min, 18 000 r/min and 21 000 r/min, respectively. The balancing effect is better than the influence coefficient method, and it needs no trial weights, which shortens the balance time and greatly improves the balance efficiency.