某型号电主轴性能测试实验研究∗

摘要

In order to grasp the performance of a certain type motorized spindle system and further research and improve the motorized spindle, this paper presents a new rapid testing to experimentally study the type of motorized spindle system, that is to say, through hammering method, electrical measuring method and multi-point temperature measurement method to gain the resonant frequency and inherent frequency, the change of vibration and temperature distribution. The experimental data show that under no-load, low speed working condition the electric spindle has high vibration; however, in the process of acceleration and low frequency, the change of vibration is not small; in the high speed period the radial vibration amplitude in-creases with the augment of motor speed;With the rotation speed fortify of motorized spindle, the vibration amplitude changes little, which can avoid the resonance effectively;as the motorized spindle speed of ascen-sion, the three temperature measures of shell body also add, but the rate declines; the highest temperature part of the body is the stator.%为了掌握某型号电主轴系统的性能及进一步研究和改善电主轴系统，文章以该型号电主轴系统为研究对象，提出了新型快捷的测试方法，即分别采用锤击法、电测法和多点测温法对其进行模态、振动和温升测试，得到了电主轴系统的共振频率和固有频率、振动变化规律和温度分布变化规律。通过得到的实验数据发现：电主轴在空载、低速工况下振动较大，在加速过程中频率较低时变化较大，在高速段时径向振动幅值随着电机转速的提高而增大；电主轴可以有效的避开共振区；随着电主轴运行速度的提升，机体外壳三个测量处的温度也升高，但变化率下降；中部定子处机体温升最高。