基于改进边带滤波和重构谱相关的行星齿轮箱故障检测  

Fault detection of a planetary gearbox based on improved sideband filtering and reconstructed spectral correlation

作　　者：蔡先阳 郭瑜[1] 伍星[1] 周俊[1] CAI Xianyang;GUO Yu;WU Xing;ZHOU Jun(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650500

出　　处：《振动与冲击》2020年第24期205-210,253,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(51675251);昆明理工大学引进人才基金(KKSY201501037)。

摘　　要：针对噪声干扰及复杂调制影响下的行星齿轮箱齿根裂纹故障检测,提出一种基于改进边带滤波和重构谱相关密度的行星齿轮箱齿根裂纹故障检测方法。应用振动分离技术对行星齿轮箱原始振动信号进行加窗截取,合成消除了时变传递路径影响的齿轮振动信号;对边带滤波技术进行改进后,在频域对该信号进行滑移边带滤波,再通过逆傅里叶变换将各频带滤波信号转换到时域并分别计算谱相关密度;将各频带信号的谱相关密度累加,获得齿轮振动信号的重构谱相关密度并以此检测行星齿轮箱齿根裂纹故障。通过正常、行星轮故障和太阳轮故障三种状态下的行星齿轮箱齿根裂纹故障实验分析表明,该方法能有效检测出行星轮、太阳轮齿根裂纹故障。Aiming at the fault detection of gear tooth crack in a planetary gearbox under the influence of noise and complex modulation interference,a fault extraction method based on improved sideband filtering and reconstructed spectral correlation density was proposed.Firstly,the vibration separation technology was applied to the vibration of the planetary gearbox to synthesize the gear vibration which has eliminated the influence of time-varying transmission path;After improving the sideband filtering,slide sideband filtering was performed on the vibration in the frequency domain,the filtered signals of each frequency band were converted into the time domain by the inverse Fourier transform and the spectral correlation density was calculated.Finally,the spectral correlation density of signal in each frequency band was accumulated to obtain the reconstructed spectral correlation density of the gear vibration and thereby detect the root crack failure.The experimental results of the planetary gearbox with tooth root crack under normal conditions,faulty planetary gear and faulty sun gear show that the method can detect the characteristics of faulty planetary and sun gears effectively.

关 键 词：行星齿轮箱 谱相关密度 边带滤波 齿根裂纹 振动分离 

分 类 号：TH132.425[机械工程—机械制造及自动化] TH132.46