基于振动监测的静载荷滑动轴承接触摩擦故障诊断实验研究  

Experimental Study on Diagnosing of Contact Friction Fault of a Plain Bearing with Dead-Load Based on Vibration Monitoring

作　　者：秦萍[1] 阎兵[1] 华春蓉[1] 谭达明[1] 

机构地区：[1]西南交通大学机械工程学院,四川成都610031

出　　处：《摩擦学学报》2004年第4期364-368,共5页Tribology

摘　　要：采用静载荷滑动轴承试验台模拟轴颈-轴承从液体润滑状态逐步向干摩擦状态过渡时的接触摩擦故障的发生和发展过程,进而利用振动信号诊断滑动轴承的接触摩擦故障;通过对特征参数进行归一化处理得到无量纲特征参数,进而通过无量纲特征参数的适当数学组合得到无量纲诊断准则,并探讨了无量纲诊断准则的适用性.结果表明:利用所得到的无量纲诊断准则进行轴颈-轴承接触摩擦故障诊断时无须建立用于模式识别的标准模,可实现快捷方便的故障诊断;无量纲诊断准则对工况不敏感,而对故障更敏感,适用于可变工况下滑动轴承的故障诊断,且诊断成本较低.A plain bearing with dead-load was performed to simulate the fault occurrence and development of the axle journal and bearing running at different lubricating conditions. The transition of the bearing operation states from oil-lubricated running to dry-running was realized by cutting off the lubricating oil for various durations. The corresponding vibration signals were monitored and normalized so as to realize convenient and simplified diagnosis of the contact frictional fault of the plain bearing. Thus the characteristic parameters of the bearing with respect to the fault states were divided by the ones with respect to the normal state under the same operating conditions so as to establish the non-dimensional diagnosis principle based on the non-dimensional characteristics parameters. The applicability of the resulting non-dimensional diagnosis principle to the diagnosis of the contact fault of the bearing was investigated. As the results, it was unnecessary to construct the standard model for pattern recognition, making use of the established non-dimensional diagnosis principle insensitive to different operating modes but sensitive to the fault modes. Therefore, the established non-dimensional diagnosis principle was applicable to the trouble diagnosis of plain bearing in variant operating modes with significantly lowered diagnosis cost.

关 键 词：滑动轴承 接触摩擦 振动 故障诊断 

分 类 号：TH117.2[机械工程—机械设计及理论]