论文部分内容阅读
柴油机敲缸是一种常见故障，发生故障时，不仅使柴油机振动加剧，而且使其寿命缩短．活塞横向撞击气缸壁是柴油机发生敲缸故障的主要激励，经实测柴油机运行过程中的４ 个特征参数，即振动持续时间、振动峰峰值、第１ 频带功率谱峰值和第２ 频带功率谱峰值，分析得知：若振动持续时间比正常值有较大增加，且振动峰峰值和第１，第２ 频带内功率谱峰值也增加，则可断定发生了敲缸故障．通过对北京型机车柴油机故障的实际诊断，证实了此诊断方法是可行的．
Diesel knocking cylinder is a common failure, failure, not only diesel engine vibration increased, but also to shorten their life expectancy. The main impact of piston cylinder stroke on the cylinder wall is the main incentive of diesel engine knocking cylinder. The four characteristic parameters of diesel engine during the running process are the duration of vibration, the peak value of vibration, the peak value of the first frequency band and the peak value of the second frequency band, Analysis shows that: if the vibration duration is larger than normal, and the vibration peak and the first and second power spectrum peaks also increased, you can determine the knocking cylinder failure occurred. Through the actual diagnosis of Beijing locomotive diesel engine failure, this method is proved to be feasible.