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空间驱动机构内部结构复杂,同时受空间真空环境影响,内部传热过程发生变化,摩擦较强的局部会产生较大温升,导致零、部件结构尺寸发生变化,使润滑材料性能降低,从而影响机构的可靠性。驱动机构运动过程摩擦生热及内部传热过程的复杂性,使得采用数值仿真分析方法难以直接获取高精度的分析结果。针对这一现状,对空间驱动机构回转工作状态内部温度分布特性进行了测试方案设计与试验研究,分析了转速和负载对空间驱动机构内部温度分布的影响,为热分析模型的建立及修正提供了指导。
The internal structure of the space-driven mechanism is complicated. At the same time, due to the influence of the space vacuum environment, the internal heat transfer process changes. A large part of the frictional friction will cause a large temperature rise, resulting in a change of the size of the zero and component structure and a decrease of the performance of the lubricating material, Institutional reliability. The complexity of frictional heat generation and internal heat transfer during the movement of the driving mechanism makes it difficult to directly obtain the high-precision analysis results by the numerical simulation analysis method. In view of this situation, the test scheme design and experimental study on the temperature distribution characteristics of the space-driven mechanism are given. The influence of rotational speed and load on the internal temperature distribution of the space-driven mechanism is analyzed. The establishment and correction of the thermal analysis model are provided guide.