电工技术学报2018，Vol.33Issue(7)：1607-1615,9.DOI:10.19595/j.cnki.1000-6753.tces.170903
滑动电接触界面粗糙度对电枢熔化特性的影响
Effect of Interfacial Roughness of Sliding Electrical Contact on the Melting Characteristics of Armature
摘要
Abstract
In the process of electromagnetic launch, the surface melting of the armature will change the contact state between armature and rail. Once the contact state is destroyed, the transition is easy to occur. Therefore, it is necessary to analyze the melting characteristics of the surface of armature. Considering the contact surface roughness between armature and rail, the Reynolds equation of the metal liquid layer of the contact surface is listed, the temperature field, stress field and electromagnetic field are coupled, and the thermo-elastic-magnetohydrodynamics model is established, based on this, the effect of roughness magnitude and distribution of the contact surface on the surface melting speed of armature and thickness of metal liquid layer are analyzed. Under the setting parameters, the results show that the greater the magnitude of contact surface roughness, the bigger melting speed of the surface of armature, and at the same time, the greater the minimum thickness of metal liquid layer. Compared to the distribution of roughness, the magnitude of contact surface roughness has a greater effect. The analysis results are of great significance for improving the contact state between armature and rail and avoiding the transition.关键词
滑动电接触/粗糙度/熔化/金属液化层/磁流体动力学Key words
Sliding electrical contact/roughness/melt/metal liquid layer/magnetohydrodynamics分类
信息技术与安全科学引用本文复制引用
李白,鲁军勇,谭赛,姜远志,张永胜..滑动电接触界面粗糙度对电枢熔化特性的影响[J].电工技术学报,2018,33(7):1607-1615,9.基金项目
国家自然科学基金资助项目(51522706,51407191,51307176). （51522706,51407191,51307176）
