浙江电力
浙江電力
절강전력
ZHEJIANG ELECTRIC POWER
2013年
8期
29-32
,共4页
范明%夏强峰%屠晔炜%王彪%言伟
範明%夏彊峰%屠曄煒%王彪%言偉
범명%하강봉%도엽위%왕표%언위
变电站%引线线夹%失效%分析
變電站%引線線夾%失效%分析
변전참%인선선협%실효%분석
substation%wire cleat%failure%analysis
通过对某变电站220 kV设备失效引线线夹的宏观检验、成分光谱分析、金相组织分析、材料力学性能测试等，对设备引线线夹的开裂失效原因进行了初步分析。分析认为，设备线夹安装残余应力导致其受力不均，线夹铸造材质疏松、晶粒粗大，选用线夹材料强度不当，水汽渗入引线线夹压接头内部等，是线夹开裂的主要原因，并据此提出了改进建议。
通過對某變電站220 kV設備失效引線線夾的宏觀檢驗、成分光譜分析、金相組織分析、材料力學性能測試等，對設備引線線夾的開裂失效原因進行瞭初步分析。分析認為，設備線夾安裝殘餘應力導緻其受力不均，線夾鑄造材質疏鬆、晶粒粗大，選用線夾材料彊度不噹，水汽滲入引線線夾壓接頭內部等，是線夾開裂的主要原因，併據此提齣瞭改進建議。
통과대모변전참220 kV설비실효인선선협적굉관검험、성분광보분석、금상조직분석、재료역학성능측시등，대설비인선선협적개렬실효원인진행료초보분석。분석인위，설비선협안장잔여응력도치기수력불균，선협주조재질소송、정립조대，선용선협재료강도불당，수기삼입인선선협압접두내부등，시선협개렬적주요원인，병거차제출료개진건의。
The cause for cleat crack of 220 kV fixture wire is preliminarily analyzed in this paper on the basis of macroscopic examination, spectral analysis on the composition, metallographic structure analysis and test on mechanical property of material. It is concluded by the analysis that the cleat crack was mainly caused by un-even stress due to residual stress during installation, loosen casting material of cleat and gross grain, inappro-priate strength of material of the cleat and inleakage of steam into the clamp joint, according to which the im-provement is proposed.
