基于包络谱分析的滚动轴承滚动体故障声发射诊断研究  

Study of Acoustic Emission Diagnosis of Rolling Bearing Rolling Element Fault Based on Envelope Spectrum Analysis

作　　者：郭福平[1,2] 段志宏[2] 孙志伟[2] 

机构地区：[1]广东石油化工学院机电工程学院,广东茂名525000 [2]广东石油化工学院石化装备故障诊断重点实验室,广东茂名525000

出　　处：《组合机床与自动化加工技术》2015年第2期104-106,109,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：广东省石化装备故障诊断重点实验室开放课题(GDUPTKLAB201324);广东省茂名市科技计划(201316)

摘　　要：滚动轴承的早期故障信号很微弱,常规的振动法很难检测。声发射检测法具有采集较宽频率范围信号的特点,故文章采用声发射法对滚动体缺陷滚动轴承进行检测,采集宽频的声发射信号,利用小波分析方法把信号分解在不同频带,对低频信号进行重构,重构后的包络谱特征频带与滚动体故障理论特征频率相比较。结果表明,在包络谱图上可以找到理论的故障特征频率范围,这说明包络谱分析法对滚动轴承滚动体故障声发射诊断是有效的。The early fault signal of rolling bearing is so weak that it is difficult to be detected by the conven-tional vibration method. Acoustic emission detection method can acquire more wide frequency range of sig-nal. So the method of acoustic emission was adopted to detect the rolling bearing rolling element defect and gather the wide frequency acoustic emission signal . Then using the wavelet analysis method to decompose the signal in different frequency band and reconstruct low-frequency signal . Finally , comparing the enve-lope spectrum characteristics of reconstruction frequency band with the frequency of rolling element fault the-ory . The results showed that the theoretical fault characteristic frequency range can be found on the envelope spectrum diagram , which indicated that it is effective for rolling bearing rolling element fault in acoustic e-mission diagnosis by the envelope spectrum method .

关 键 词：声发射 滚动轴承 小波分析 包络谱分析 

分 类 号：TH165.3[机械工程—机械制造及自动化] TG506[金属学及工艺—金属切削加工及机床]