空间润滑谐波减速器失效机理研究  

Failure Mechanism of Harmonic Drivers for Space

作　　者：李俊阳[1] 王家序[1] 周广武[1] 郑军[2] 郝宏[2] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044 [2]兰州空间技术物理研究所,甘肃兰州730000

出　　处：《摩擦学学报》2013年第1期44-48,共5页Tribology

基　　金：国家自然科学基金重点项目(50735008);"两江学者"计划专项经费;中央高校基本科研业务费(CDJXS11111137)资助~~

摘　　要：为研究空间环境下谐波减速器失效机理,并为其可靠性寿命试验提供理论基础,对空间润滑谐波减速器进行5 000 h真空寿命试验.结果表明:DLC薄膜与润滑脂(Braycote601)复合润滑的柔轮-刚轮齿面运转良好,Braycote601油脂单独润滑的柔轮内壁-柔性轴承外圈出现严重磨损.对其进行混合润滑数值分析,结果显示在3～150 r/min的转速范围内,该接触区域始终处于混合润滑状态并由此导致磨损产生,微凸体直接接触所负担的载荷比例随转速的增加而减小,随温度与载荷的增加而增大;低速运转时,温度与载荷对微凸体接触程度的影响效果明显,但随着转速的增大,温度与载荷的影响快速减弱.To study the failure mechanism of harmonic drivers under the space environment, and provide a theoretical foundation for its reliability life testing, a 5 000 h vacuum life test of harmonic drivers was conducted. The results show that the flexspline -circular spline interface with DLC film/grease （Braycote601）composite lubricated operates well, and flexspline- wave generator bearing interface appeared serious wearing. Then numerical analysis of mixed lubrication was conducted to study the failure mechanism. The results showed that at 3 ~ 150 r/rain range of speed, this contact area was always in mixed lubrication state, and which caused wear. The load proportion that asperity contact undertook was decreased with increasing of revolution, and was increased with increasing of temperature and load. At low speed , the temperature and load had great effect on asperity contact, and it was getting weaken with the increasing of speed.

关 键 词：谐波减速器 固体-油脂复合润滑 失效机理 混合润滑数值分析 

分 类 号：TH117.3[机械工程—机械设计及理论]