机车柴油机主轴承烧瓦故障振动诊断的研究

Research on Vibration Fault Diagnosis for Fire-loss Bush of the Main Bearing in Locomotive Diesel Engine

在对 ND2 机车柴油机滑动主轴承烧瓦故障机理分析的基础上 ,阐述了柴油机的振动激励源及特征量与烧瓦故障之间的关系 ,并介绍了柴油机的振动监测与诊断的试验研究 ,试验结果表明 :利用机座外表面的振动特性的变化可以诊断出机车柴油机主轴承的故障状态 .

Based on analyzing the fault mechanism for fire loss bush of the main bearing in ND 2 diesel engine, The paper firstly presents the relations between exciting source of vibration and fire loss bush fault;then introduces experiments on vibration detection and diagnosis of the engine; finally,the results show that the condition of fault for the main bearing can bediagnosed through detceting the vibration of engine base surface.