摘要
针对高速电主轴可靠性研究存在的问题,探讨了小子样电主轴性能退化可靠性试验方法,完成了两根170MD18Y16型电主轴的退化试验;依据选定的性能退化特征量和截尾时间,检测了主轴轴端径向跳动量,据此建立试样电主轴退化模型,分析其失效寿命;基于跳动量测试数据和Weibull分布函数,应用修正极大似然函数分析分布参数,得到170MD18Y16型电主轴特征寿命,并确定其寿命分布模型。电主轴寿命理论值与实际使用值基本一致,表明小子样电主轴性能退化试验方法合理,建立的退化模型较准确地反映了电主轴性能退化轨迹,且寿命分布模型分析方法有效。
To avoid the disadvantages of reliability analysis on high-speed motorized spindle,a performance degradation reliability test method was proposed herein by two 170MD18Y16 motorized spindles.Firstly,according to the feature quantity and truncated time,a model of small sample motorized spindle was established with shaft end radial run out data to analyze failure life.Secondly,the characteristic life model of 170MD18Y16 motorized spindle was based on the data and Weibull distribution to analyze the distribution parameters by modified maximum likelihood function.Finally,the characteristic life of motorized spindle is consistent with the actual value.The results indicate that the method of performance degradation reliability test is reasonable,and the degradation model may reflect the performance degradation trajectory.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2016年第20期2738-2742,2748,共6页
China Mechanical Engineering
基金
陕西省教育厅科研计划资助项目(15JK1309)
西安工程大学博士科研启动基金资助项目(BS1503)
关键词
小子样电主轴
性能退化
可靠性试验
轴端跳动量
退化模型
small sample motorized spindle
performance degradation
reliability test
run out data of shaft end
degradation model
