为了获得空间环境对MoS2固体润滑运动部件寿命的影响情况并预测运动部件在轨寿命, 分析了空间环境对固体润滑膜层的影响。 分析显示: 影响空间运动机构寿命主要有三大因素, 分别为: 航天发射环境、真空度和温度交变。设计了某空间运动部件的寿命试验, 试验模拟了影响空间运动机构的三个重要因素: 采用力学试验模拟航天发射环境, 热真空寿命试验模拟真空度和温度交变条件。采用X射线能量分散谱仪(EDS)对试验中运动部件的轴承未磨损滚道、磨损滚道表面膜层成分和滚珠表面材料进行了分析, 结果显示试验中未形成转移膜。根据试验结果预测试验中的MoS2固体润滑运动部件在轨寿命至少为107次以上。最后根据影响运动部件寿命的因素, 提出了增加空间运动部件工作可靠性, 提高工作寿命的相关措施。

To explore the effect of space environment on the working life of solid-lubricated rotating parts and forecast their working life in orbit, the influence of space environment on solid-lubricated films was analyzed. The analysis points out that three main factors are relative to the working life of the space rotating parts, which are space launch environment, vacuum degree and alternating temperature. A life test was designed to simulate the three factors, in which the mechanical test was used to simulate space launch environment, and the thermal vacuum test was taken to simulate the vacuum and alternating temperature. The X-ray Energy Dispersive Spectrometer (EDS)was used to analyze the film composition of the unworn race and the worn race for a bearing in the solid-lubricated rotating part as well as ball surface materials.The analysis results show that the transfer film has not formed. On the result, it forecasts that the working life of the solid-lubricated rotating part in the test would be up to 107 times. Finally, it gives some necessary suggests that should been taken to increase the reliability and improve the work life of space rotating parts.