基于水平垂直同步峰值比的球轴承外圈剥落故障位置定位研究

RESEARCH ON LOCATION OF SPALLING FAULT LOCATION OF BALL BEARING OUTER RING BASED ON THE HORIZONTAL VERTICAL SYNCHRONIZATION PEAK RATIO

球轴承的外圈剥落故障角度位置对旋转机械的振动大小与使用寿命有重要影响,在承载区间内判断外圈剥落故障角度十分必要。基于加速度振动信号的峰值变化规律,提出了一种球轴承外圈剥落故障定位方法。该方法建立具有时变撞击力的拉格朗日动力学方程,通过分析球轴承承载区接触力的变化趋势,类比推理得出振动加速度信号绝对值峰值比规律,分析了加速度振动信号冲击点的附近位置,提出了一个新的判断指标,得到了故障具体发生的位置。仿真与实验结果表明,球轴承外圈剥落故障不同位置的振动信号的水平垂直同步峰值比存在相对应的函数关系。通过仿真和实验验证了该定位规律的准确性。为判断球轴承外圈剥落故障位置的诊断方法提供了理论依据。

The outer ring spalling failure angle position of the rolling bearing has an important influence on the vibration size and service life of the rotating machine.It is necessary to judge the outer ring spalling failure angle within the load-bearing interval.Based on the peak change law of the acceleration vibration signal,a fault location method was proposed for ball bearing outer ring spalling.This method established the Lagrangian dynamic equation with time-varying impact force.By analyzing the change trend of the contact force in the bearing area of the ball bearing,the law of the peak ratio of the absolute value of the vibration acceleration signal was obtained by analogy,and the impact point of the acceleration vibration signal was analyzed.For nearby locations,a new judgment index was proposed,and the specific location of the fault was obtained.Simulation and experiment results show that there is a corresponding functional relationship between the horizontal vertical synchronization peak ratio of the vibration signals at different positions of the ball bearing outer ring spalling fault.Simulation and experiment verify the accuracy of the positioning law.It provides a theoretical basis for the diagnosis method to determine the location of the ball bearing outer ring spalling fault location.