基于截尾样本的最大似然估计法下防尘盖和密封圈对轴承可靠度的影响

Influence of Shield and Seal Ring on Bearing Reliability Based on Sample Truncation Maximum Likelihood Estimation

对轴承子系统采取更加合理的划分方式,提高最终结果的精确度,把以往忽略了的防尘盖和密封圈对整个系统的影响,通过数学模型分析其可靠度的影响。研究方法是基于截尾样本的最大似然估计法,推导新的数学模型并分析数据。全新的数学模型使最后的防尘盖与密封圈的子系统模型的精度提高,可靠度的下降趋势伴随着里程数的增加开始,其里程与可靠度的曲线显示了防尘盖与密封圈的可靠度变化规律是一条平滑的曲线。防尘盖与密封圈对整个系统产生的影响是不能忽略的。

The paper adopted more reasonable dividing way for bearing system to increase the accuracy of the ultimate result, for ignored influence of shield and seal ring on the whole system, the paper analyzed its influence on reliability through mathematic model. The research method is based on the sample truncation the maximum likelihood estimation, to deduce the new mathematic model and analysing the data. The brand new mathematic model makes the subsystem of shield and seal ring precision higer, as the increasing mileage, the trend reliability begins dropping. The changing is a smooth curve. The influence of the shield and seal ring on whole production can＇t be ignored.