架空输电线路连接金具U型挂环的尺寸优化设计及耐磨性能研究  

Study on the Optimization Design of Dimensions and Abrasion Resistance of U-Shaped Suspension Rings for Overhead Transmission Line Connection Fittings

作　　者：李冬青 郑树会 刘臻 刘胜春 司佳钧 LI Dongqing;ZHENG Shuhui;LIU Zhen;LIU Shengchun;SI Jiajun(China Electric Power Research Institute,Beijing 02401,China)

机构地区：[1]中国电力科学研究院有限公司,北京102401

出　　处：《材料保护》2024年第11期166-171,共6页Materials Protection

基　　金：国家电网有限公司总部科技项目(5500-202216123A-1-1-ZN)资助。

摘　　要：在强风沙环境下,传统架空输电线路连接金具在运行时会发生剧烈磨损,严重影响架空输电线路的安全可靠运行。为解决这一问题,对连接金具U型挂环进行了尺寸优化设计以及材料比选研究,并开展了新型U型挂环的磨损试验。结果表明:35CrMo钢U型挂环的耐磨性能较好,U型挂环经过尺寸优化设计后,磨损接触面增大,在同样磨损体积下,磨损深度略有降低,磨损试验后破坏载荷均满足标准要求。Q355NH耐候钢U型挂环的耐磨性能较差,15万次磨损试验后,磨损深度是35CrMo钢的2.3倍。因此,优化设计后的35CrMo钢U型挂环可以考虑应用于输电线路工程中。In strong wind and sand environments, traditional connection fittings for overhead transmission lines experience severe wear during operation, which significantly impacts the safe and reliable operation of overhead transmission lines. To address this issue, the U-shaped suspension rings of the connection fittings were optimized in terms of dimensions, and a material selection study was conducted. Additionally, wear tests were performed on the newly designed U-shaped suspension rings. Results showed that U-shaped suspension rings made of 35CrMo steel exhibited superior wear resistance. After dimensional optimization of U-shaped suspension rings, the wear contact area increased, leading to a slight reduction in wear depth under the same wear volume. The failure load after the wear tests met the standard requirements. In contrast, U-shaped suspension rings made of Q355NH weathering steel demonstrated poor wear resistance, with a wear depth 2.3 times greater than that of 35CrMo steel after 150 000 wear cycles. Therefore, the optimized 35CrMo steel U-shaped suspension rings could be considered for application in transmission line projects.

关 键 词：U型挂环 磨损 Q235钢 35CRMO钢 Q355NH钢 

分 类 号：TH117.1[机械工程—机械设计及理论]