汽油机曲轴轴承异响故障诊断研究

Diagnosis Research on Main Bearing Wear of Gasoline Engines

基于振动测试技术,对发动机曲轴轴承磨损故障进行诊断研究。在EQ6100型发动机上模拟曲轴轴承磨损,然后测取不同的转速、轴承间隙、测点、温度下的故障信号,并用时域、频域分析法进行了分析比较。通过分析,提取了曲轴轴承磨损故障的诊断特征参数并指出目前该故障诊断所存在的问题。

The different clearances of main bearing designed on EQ6100 model gasoline engine is diagnosed by means of vibration monitoring mechanism. Breakdown signals under the conditions of different speeds, clearances of main bearing, test spots and temperature were analyzed by spectral analysis method and compared with normal and abnormal vibration signals. As a result, the characteristic parameters and the identifying methods of breakdown are given. In addition, the problems of fault detection are pointed out.