空间飞行器小模数齿轮接触分析及实验研究  

Contact Analysis and Experimental Investigation of Small-Module Gear in Spacecraft

作　　者：张广玉[1] 齐立群[1] 董惠娟[1] 单小彪[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001

出　　处：《华南理工大学学报（自然科学版）》2011年第11期65-70,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50905039);黑龙江省自然科学基金资助项目(E200924)

摘　　要：为研究空间某飞行器中小模数齿轮在真空环境下的接触力学与摩擦学行为,首先建立了齿轮啮合面接触应力的数学模型,得出了齿轮啮合面的应力分布规律;然后搭建了真空齿轮系统摩擦磨损实验平台,并对比研究了真空条件和空气中常压条件下齿轮的主要磨损形式;通过扫描电子显微镜对啮合面不同位置的磨痕微观形貌进行表征,研究了齿轮摩擦磨损行为与啮合面接触应力分布的关系.结果表明:真空条件下齿轮副比常压条件下更易发生粘着磨损,接触应力分布与粘着磨损密切相关;接触应力大小对轮齿的粘着有着决定性的影响;空间齿轮机构在真空环境下的磨损形式主要为粘着磨损,空气环境下的磨损形式主要为疲劳磨损和磨粒磨损.In order to investigate the contact mechanics and the friction as well as wear mechanism of small-module gears in a spacecraft in vacuum environment, a mathematical model to describ the contact stress loading on the gear meshing interface was established, and the stress distribution was analyzed. Then, a vacuum friction-and-wear experimental platform of the gear system was set up, and the main friction and wear behaviours of a gear in vacuum and atmorsphere are comparatively investigated. Finally, according to the micromorphology of wear scar at defferent locations on the meshing surface, the relationship between the contact stress distribution in the gearing interface and the friction and wear behaviours of the gear is analyzed. The results show that the occurrence of adhesive wear in vacuum environment is more easier than that in atmospheric condition, that the contact stress distribution closely relates to the adhesive wear, that the contact stress value has a decisive effect on the adhesion of gear, and that the wear form of the space gear in vacuum environment is mainly adhesive wear, while that in atmorspheric conditon is fatigue wear combining with abrasive wear.

关 键 词：空间飞行器 小模数齿轮 摩擦 磨损 接触应力 实验研究 

分 类 号：TH117[机械工程—机械设计及理论]