斯特林制冷机污染退化的加速寿命模型  

An Accelerated Life Model for Contamination Degradation of Stirling Cryocooler

作　　者：杨少华[1] 张晓明[1] 刘心广[2] 吴亦农[2] 

机构地区：[1]信息产业部电子第五研究所电子元器件可靠性物理及其应用技术国家级重点实验室,广东广州510610 [2]中国科学院上海技术物理研究所,上海200083

出　　处：《红外技术》2008年第8期462-464,共3页Infrared Technology

基　　金：国家高技术发展(863)计划项目(2006AA04Z411)

摘　　要：基于制冷机的污染失效机理、材料出气特性,探索性地提出制冷机污染退化的加速寿命模型,阐述了各模型参数的物理意义,并利用4300 h的加速试验数据建模拟合,发现与加速寿命模型有较好的符合关系,最后提出外推到常规条件寿命的加速系数的计算方法。由于试验数量少,所得模型尚不成熟,需要更多的后续试验来验证,但该寿命模型的提出,对于实现快速寿命评价和考核具有参考价值。In this paper, based on contamination failure mechanism and material outgassing characteristic, an accelerated life model for performance degradation of Oxford type stifling cryocooler is established, and the physical meanings of model parameters are discussed. Fitted by a 4300 hours high temperature operation accelerated life test data, it is found that the life data is agree with the life model very well. Finally, life accelerated factor is introduced, which an lifetime extrapolation method from accelerated operation to conventional condition. For lack of test samples, the model obtained is not mature and requires more added test to validate. However, this model is referable and valuable to achieve quick life evaluation and assessment.

关 键 词：斯特林制冷机 污染 寿命模型 加速系数 

分 类 号：TB651[一般工业技术—制冷工程]