摘要
由内滚道、外滚道和柔性环构成的载流摩擦副是空间旋转电传输机构的导电核心部件。为研究真空温度对柔性环传输性能的影响,在1×10^(-3)Pa真空、-30℃~120℃温度范围内开展了柔性环滚动载流摩擦磨损试验。随着温度由-30℃增加至120℃,稳态平均摩擦力从3.96 N降低到1.48 N,预紧力从6.8 N下降至5.9 N,平均接触电阻和磨损量并无明显变化。微观形貌显示磨痕宽度从47.37μm增加至66.71μm,磨损区域粗糙度从0.45μm下降至0.25μm。材料高温软化引起的摩擦区域挤压变形是磨痕宽化的主要原因,材料软化及其诱导的磨痕宽化导致柔性环预紧力衰退。
The current-carrying frictional pair composed of inner raceway,outer raceway,and flexible ring is the conductive core component of the space rotating electrical transmission mechanism.To investigate the effect of vacuum temperature on the transmission performance of flexible rings,rolling current-carrying tribological tests were carried out in the temperature range of-30℃~120℃in 1×10^(-3)Pa vacuum.As the temperature increased from-30℃to 120℃,the steady-state average friction force decreased from 3.96N to 1.48N,and the elastic force decreased from 6.8N to 5.9N.There was no significant change in the average contact resistance and wear amount.Microscopic morphology showed that the wear width increased from 47.37μm to 66.71μm,the roughness of the worn area dropped from 0.45μm to 0.25μm.The extrusion deformation caused by high-temperature softening of materials should be the main reason for the widening of wear marks.Material softening and its concomitant widening of wear marks lead to a decline in the elastic force of the flexible ring.
作者
宋晨飞
王炳辉
刘自立
侯欣宾
张永振
SONG Chenfei;WANG Binghui;LIU Zili;HOU Xinbin;ZHANG Yongzhen(National United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology,Luoyang 471023,China;Qian Xuesen Laboratory of Space Technology,China Academy of Space Technology,Beijing 100094,China)
出处
《中国空间科学技术(中英文)》
北大核心
2025年第2期25-32,共8页
Chinese Space Science and Technology
基金
民用航天技术预先研究项目(D010103)。
关键词
温度
磨损宽度
滚动载流摩擦
软化
真空
temperature
wear width
rolling current-carrying tribology
soften
vacuum
