动车组牵引电机用绝缘轴承涂层热失效机理研究  

EMU Traction Motor with Thermal Insulation Bearing Coating Failure Mechanism

作　　者：李世杰 田泽鹏 

机构地区：[1]中车永济电机有限公司研发中心,陕西西安710018 [2]太原铁路局永济监造项目部,山西永济044502

出　　处：《现代工业经济和信息化》2017年第10期60-62,共3页Modern Industrial Economy and Informationization

摘　　要：牵引电机用绝缘轴承在长期交变热作用下,涂层绝缘性能发生破坏,严重的会使绝缘层剥落。针对绝缘涂层结构特征,运用三层圆筒力学理论模型和有限元法对不同材料界面间热应力的分布规律进行了分析对比。结果表明,氧化层破坏了涂层结构的热稳定性,随氧化层厚度的增加,粘结层/氧化层界面间热残余拉应力急剧增大,抑制氧化层增长能有效提高绝缘轴承寿命。With insulated bearing in the long-term alternating heat under the action of traction motor, insulation performance occurred serious damage, will cause the insulation layer peeling. For insulation coating structure, distribution using three cylinder mechanics model and finite element method of different material interface between thermal stress are analyzed. The results show that the oxide layer is destroyed The thermal stability of the coating structure, with increasing thickness of the oxide layer, the bonding layer/oxide interface between thermal residual tensile stress increases rapidly, inhibit the oxidation layer growth can effectively improve the insulation bearing life.

关 键 词：轴承绝缘 圆筒模型 有限元 涂层失效 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TM305.2[金属学及工艺—金属学]