基于声发射检测的滑动轴承状态诊断实验研究

Experimental Study on Condition Diagnosis of Sliding Bearings Based on Acoustic Emission Detection

首先通过理论计算得出了不同润滑参数下,滑动轴承声发射信号能量的大小,然后通过在300 MW汽轮发电机组模拟转子试验台上模拟工程实际中滑动轴承的两类常见异常工况,利用小波分析和传统的傅立叶变换对得到的滑动轴承声发射信号进行分析处理,提取了轴承声发射信号的特征参数,并得到了滑动轴承不同运行状态下的声发射信号特征参数变化规律,同时也验证了理论分析结果。

The theoretical calculation results of sliding bearing AE signal under different lubrication parameters condition is introduced. Two common abnormal conditions of sliding bearing are simulated on analog rotor test bed for 300MW turbo-generator unit. The AE signals of sliding bearing are analyzed by the software, which is developed based on MATLAB. Finally, under different working conditions, the laws of parameter change of its AE signals are observed, which also verify the theoretical analysis results.