超高压线夹端子断裂失效分析

华电技术 ›› 2015, Vol. 37 ›› Issue (4): 28-31.

超高压线夹端子断裂失效分析

(广西大学机械工程学院，南宁〓530004)

出版日期:2015-04-25 发布日期:2015-06-02

Analysis on fracture failure of EHV line clamp terminal

(College of Mechanical Engineering, Guangxi University, Nanning 530004, China)

Online:2015-04-25 Published:2015-06-02

摘要/Abstract

摘要： 摘要：针对某站超高压变压器断裂线夹端子断裂失效的问题，通过材料力学性能测试、金相组织分析、试样断口分析及有限元计算，确定线夹端子材料存在微气孔及铸造缩孔(或疏松)等缺陷、线夹端子安装时螺栓预紧力过大为断裂失效的主要原因，提出了改进建议。

关键词: 关键词：超高压输电, 线夹端子, 断裂失效, 断口分析, 有限元计算

Abstract: Abstract:In a substation, the line clamp terminal of the EHV transformer failed due to fracture. Mechanical property test, microstructure analysis, sample fracture analysis and finite element calculation for the clamp terminal were carried out. It was determined by the analysis results that there were defects in the clamp terminal material, which include the micro-pores, the casting shrinkage hole (or loose) and others. Meanwhile, the bolt pretightening force during the clamp terminal installation was too large. These caused the fracture failure of the clamp terminal. Some targeted improvement suggestions were given.

Key words: Keywords:extra high voltage (EHV) transmission, line clamp terminal, fracture failure, fracture analysis, finite element calculation

陈家权，刘福营，苏光耀，黄海鑫，吴根深. 超高压线夹端子断裂失效分析[J]. 华电技术, 2015, 37(4): 28-31.

CHEN Jiaquan, LIU Fuying, SU Guangyao, HUANG Haixin, WU Genshen. Analysis on fracture failure of EHV line clamp terminal[J]. Huadian Technology, 2015, 37(4): 28-31.

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