摘要
在考虑裂纹转轴时变刚度的条件下,基于裂纹转子动力学模型提出了一种基于轴心轨迹形态的转子裂纹故障诊断方法,并对转子系统1/3和1/2临界转速附近的轴心轨迹形态变化进行了分析。结果表明:在1/3和1/2临界转速附近,裂纹转子系统轴心轨迹的内环形状和偏置方向均会随转速发生变化,且偏置按一定的角度改变;轴心轨迹的变化规律为判断转子裂纹故障提供了新的方法,从而提高了转子故障诊断的效率。
With the aid of dynamic model of a cracked rotor, a crack fault diagnosis method was proposed based on the change of morphological characteristics of axis orbits considering the variable stiffness. The morphological characteristics of axis orbits were analyzed when the rotor passing through the 1/3 and 1/2 subcritical speed. Results show that the shape and offset direction of inner loops in axis orbits change with gle. rotating speed around the 1/3 and 1/2 subcritical speed, and the offset direction varies in a certain an- The change rule of axis orbits provides a new method for judgment of crack faults, thus the efficiency of fault diagnosis is improved.
作者
向玲
张悦
XIANG Ling;ZHANG Yue(Department of Mechanical Engineering, North China Electric Power University, Baoding 071003, Hebei Province, China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2018年第5期380-385,399,共7页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(51675178)
关键词
转子
裂纹
轴心轨迹
临界转速
故障诊断
rotor
crack
axis orbit
subcritical speed
fault diagnosis
