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首页> 外文期刊>International Journal of Vehicle Noise and Vibration >Vibration diagnosis of main journal bearings for diesel engines
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Vibration diagnosis of main journal bearings for diesel engines

机译：柴油机主轴颈轴承的振动诊断

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摘要

A comprehensive summary of the vibration diagnosis techniques used to detect the wear of the main journal bearings in a diesel engine is presented. The load of the main journal bearing, the minimum thickness of the oil film, the oil film pressure and the locus of the crankshaft centre have been calculated based on the measured thermal parameters. Simulated wear experiments for the main journal bearing have been carried out in laboratory conditions. The strain and vibration on the main journal pedestals in the vertical direction were measured under various working conditions. The strain signals on the main journal bearing pedestal are related to the oil film forces, damped by the lubricant oil. The excitation sources and the vibration characteristics of the main journal bearing pedestal system were analysed by measuring the vibration signals. The relationships between the feature parameters of the vibration signals and the wear conditions of the main journal bearing have been obtained. It is promising, therefore, to develop and apply the vibration diagnosis technique further to detect the wear conditions of the main journal bearings on line.
机译：介绍了用于检测柴油发动机主轴颈轴承磨损的振动诊断技术的综合摘要。根据测得的热参数计算出主轴颈轴承的负载，油膜的最小厚度，油膜压力和曲轴中心的位置。已在实验室条件下对主轴颈轴承进行了模拟磨损实验。在各种工作条件下测量主轴颈基座在垂直方向上的应变和振动。主轴颈轴承座上的应变信号与被润滑油阻尼的油膜力有关。通过测量振动信号来分析主轴颈轴承基座系统的激励源和振动特性。得到了振动信号的特征参数与主轴颈轴承磨损状态之间的关系。因此，有望进一步开发和应用振动诊断技术来检测在线主轴轴承的磨损状况。

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