理化检验-物理分册2025，Vol.61Issue(11)：63-66,4.DOI:10.11973/lhjy-wl240196
某超高压输电线路OPGW线夹断裂原因
Causes of OPGW clamp fracture of an ultra-high voltage transmission line
邹谨成 1陈军君 1刘维可 1黄蓉 2严子卓 3李文波 1姜鹏4
作者信息
- 1. 国网湖南省电力有限公司 电力科学研究院,长沙 410031||国网湖南省电力有限公司电力设备材料与结构安全实验室,长沙 410031
- 2. 湖南省湘电试验研究院有限公司,长沙 410012
- 3. 湖南省湘电试验研究院有限公司,长沙 410012||长沙理工大学,长沙 410114
- 4. 国网衡阳供电公司,衡阳 421200
- 折叠
摘要
Abstract
A fracture occurred in the OPGW clamp of a certain ultra-high voltage transmission line.The cause of the clamp fracture was analyzed using macroscopic observation,chemical composition analysis,metallographic examination,mechanical property testing,scanning electron microscopy analysis.The results show that the microstructure of YL112 aluminum alloy was mainly composed of α-Al and needle like eutectic silicon,and a second phase of Al-CuAl2-Si precipitated between α-Al and eutectic silicon.The second phase would reduce the corrosion resistance of aluminum alloy,resulting in a decrease in the tensile strength of the wire clamp during long-term operation.When the wire clamp was subjected to OPGW icing load,the needle like eutectic silicon near the shaft pin would intensify stress concentration,leading to the formation of crack sources in that area.At the same time,the needle like structure of eutectic silicon and the aluminum alloy casting holes provided conditions for crack propagation,ultimately causing the wire clamp to fracture.关键词
超高压输电线路/线夹/光纤复合架空地线/腐蚀/显微组织Key words
ultra-high voltage transmission line/clamp/OPGW/corrosion/microstructure分类
矿业与冶金引用本文复制引用
邹谨成,陈军君,刘维可,黄蓉,严子卓,李文波,姜鹏..某超高压输电线路OPGW线夹断裂原因[J].理化检验-物理分册,2025,61(11):63-66,4.
