Of thetraditional time-domain parameters, the peak-to-peak value, variance, kurtosis value, clearance factor can be selected as the diagnostic parameters for their sensitivities to plunger wear.

• 在传统的时域指标中,峰峰值、方差、峭度指标、裕度指标对磨损故障比较敏感,可作为诊断特征参数;