高速电主轴非接触电磁加载研究

摘要

为了克服接触式加载中存在的摩擦、振动、噪声等问题,提出应用电磁加载的方法,研制电主轴非接触加载试验平台,进行电主轴非接触加载试验.推导加载装置的吸引力公式,通过磁路分割法计算加载力,并进行有限元仿真计算.通过力传感器采集电磁铁不同输入电流下的加载力,并与理论计算值和有限元仿真值进行对比,验证非接触加载的正确性和可行性；在恒定输入电流情况下,电主轴不同转速时进行电磁铁加载力的测试,得出加载力与转速的关系曲线.研究结果表明:计算值、仿真值与实测值比较接近,说明实验装置设计正确.本实验平台可准确高效采集加载力、温度等信息.%To overcome the existing problems in the contact-loading,such as friction,vibration and noise,the method of loading by the electromagnet was put forward.Motorized spindle non-contact loading test platform was developed.The attractive force formula of the loading device was deduced.The loading force value was theoretically calculated by division of magnetic path and simulated by FEM.Loading forces in different input current of electromagnet were collected.Comparing theoretically calculated and simulated values with actual load collected by experiments,the correctness and feasibility of non-contact loading was verified.Data acquisition of loading forces in different speed of motorized spindle was carried out,and the forces and loading speed relation curve were deduced.The results show that the calculated values and simulation values are close to measured results,which indicates that the test platform is designed correctly.The test platform can accurately capture the efficiency loading force,temperature and so on.