基于周期性声发射撞击计数的滚动轴承故障诊断

摘要

分析滚动轴承不同类型故障特征频率与声发射累积撞击计数间的内在联系,建立基于周期性声发射累积撞击计数的滚动轴承故障诊断方法.采用非接触式声发射测试技术,对工作状态下滚动体、外圈和内圈故障分别进行测试及分析,试验结果证明了周期性声发射撞击计数与滚动轴承故障特征频率间的定量关系.依据此方法可对滚动轴承故障进行早期诊断.%The internal relations are analyzed between characteristic frequency and cumulative impact count of acoustic emission for rolling bearing with different types of surface defects, and the fault diagnosis method is established based on cyclical cumulative impact count of acoustic emission. The non - contact acoustic emission testing technology is used to test and analyze the faults of rolling element, outer ring and inner ring for rolling bearing under working state respectively. The experimental results show that there is quantitative relation between cumulative impact count of acoustic emission and fault characteristic frequency. The rolling bearing faults can be diagnosed early according to this method.