基于叶端定时的转子碰摩故障诊断方法  

Fault diagnosis method of rotor rub impact based on blade tip timing

作　　者：王维民 陈子文[1] 张旭龙 陈康 WANG Weimin;CHEN Ziwen;ZHANG Xulong;CHEN Kang(Beijing Key Laboratory of Health Monitoring and Self-Recovery for High-End Mechanical Equipment,Beijing University of Chemical Technology,Beijing 100029,China;Key Laboratory of Engine Health Monitoring-Control and Networking of Ministry of Education,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学高端机械装备健康监控与自愈化北京市重点实验室,北京100029 [2]北京化工大学发动机健康监控与网络化教育部重点实验室,北京100029

出　　处：《航空学报》2022年第8期30-39,共10页Acta Aeronautica et Astronautica Sinica

基　　金：国家重点研发计划(2020YFB2010803);国家自然科学基金(51775030,91860126)。

摘　　要：航空发动机转静碰摩不仅会影响转子的弯曲振动,还会使转子产生较明显的扭转振动,因此可通过监测扭转振动的变化情况来诊断碰摩故障。本文提出了一种基于改进叶端定时的碰摩故障诊断方法,通过监测转子扭转振动的变化进行碰摩故障的诊断预警。针对由叶片间距误差导致扭转振动测量结果不准确的问题,提出了考虑叶片加工装配和叶片振动引起间距不均匀误差的修正方法并进行了碰摩实验研究。结果表明:提出的改进叶端定时法测量结果与编码器测量结果一致,可准确反映因碰摩导致的转速波动,验证了改进方法的正确性及改进叶端定时法在碰摩故障诊断中的实用性。Aero-engine rotor static rub impact will not only affect the bending vibration of the rotor,but also cause obvious torsional vibration of the rotor.Therefore,rub impact fault can be diagnosed by monitoring the changes of torsional vibration.Here,a rub impact fault diagnosis method based on improved blade tip timing is proposed.The rub impact fault diagnosis and early warning is carried out by monitoring the change of rotor torsional vibration.To solve the problem of inaccurate measurement results of torsional vibration caused by the blade spacing error,a correction method is proposed considering the uneven spacing error caused by blade assembly and blade vibration.The experiment results show that the measurement results of the improved blade tip timing method are consistent with those of the encoder,and can accurately monitor the speed fluctuation caused by rub impact.The correctness of the improved method and the practicability of the improved blade end timing method in rub impact fault diagnosis are verified.

关 键 词：叶端定时 转静碰摩 扭转振动 转速掉转 故障诊断 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]