高速电主轴动态非接触电磁加载研究  

Non-contact Dynamic Electromagnetic Loading on High Speed Motorized Spindle

作　　者：邱荣华[1,2] 刘宏昭[1] 

机构地区：[1]西安理工大学机械与精密仪器工程学院,西安710048 [2]西安工程大学机电工程学院,西安710048

出　　处：《振动．测试与诊断》2014年第2期330-336,400,共7页Journal of Vibration,Measurement & Diagnosis

基　　金：国家科技重大专项资助项目(2012ZX04014-012);国家自然科学基金资助项目(51275404)

摘　　要：针对高速电主轴接触式加载存在结构复杂、磨损及振动大等问题,提出一种非接触式电磁加载方法。该方法中动态电磁力可模拟主轴实际切削力载荷,实现高速电主轴动态非接触加载。利用电磁理论建立了非接触电磁加载模型,分析了电磁力的影响因素。解决了实现电磁加载的关键技术,并完成加载实验台整体设计。在转速为9 000r/min、励磁电流为40mA的加载条件下,针对170MD18Y16型磨削电主轴进行了动态加载实验,并对比了励磁电流和转速变化时动态电磁力的理论和实测值。结果表明,动态加载理论值与实测值变化一致,二者误差较小,验证了动态非接触电磁加载方法的有效性,且改变励磁电流和转速可实现不同条件的加载。A non-contact electromagnet loading method is designed based on problem of complicated structure,serious abrasion,and vibration existing in the contact loading of high speed motorized spindles.In this method,the load of practical cutting forces can be simulated by using dynamic electromagnetic force, and the dynamic non-contact loading is realized.The model of non-contact electromagnetic loading is established using electromagnetic theory,and the influencing factors of the electromagnetic force are analyzed. The key technology of electromagnetic loading is solved,and the integrated experiment is designed.Under the conditions of 9 000r/min rotational speed and 40mA excitation current,the dynamic loading experiment is carried out for a 170MD18Y16grinding motorized spindle.The theoretical value is compared with the measured value of the dynamic electromagnetic force in various excitation currents and rotational speeds.The result indicates that changes are consistent,and errors between the theoretical value and measurement value of dynamic loading are small.The experimental results have verified the validity of the dynamic non-contact electromagnetic loading method,and loading under different conditions can be accomplished by changing the excitation current and rotational speed.

关 键 词：高速电主轴 电磁加载 动态电磁力 可靠性实验 非接触加载 

分 类 号：TM306[电气工程—电机]