理化检验-物理分册2025，Vol.61Issue(12)：77-81,85,6.DOI:10.11973/lhjy-wl250177
气体绝缘封闭组合开关壳体泄漏原因
Leakage causes of the housing for gas-insulated closed combination switches
摘要
Abstract
The SF6 gas leakage fault occurred in the air chamber housing of a gas insulated closed combination switches.The causes of the leakage of the gas insulated switchgear housing were analyzed by means of macroscopic relationship,penetration detection,X-ray digital imaging detection,chemical composition analysis,mechanical property test,metallographic examination,scanning electron microscope and energy spectrum analysis,finite element simulation analysis.The results show that the content of Al and Si elements in the local area was high.During the casting process,the housing material produced loose and porosity defects,and the defects were not completely removed during the repair welding.Under the combined action of internal medium stress and welding residual stress,the housing cracked and produced penetrating defects,which eventually led to leakage failure of the housing.关键词
气体绝缘封闭组合开关/泄漏/疏松/气孔/残余应力Key words
gas-insulated closed combination switch/leakage/loose/porosity/residual stress分类
通用工业技术引用本文复制引用
XIE Zongxi,YE Jianfeng,SHI Yakun,TIAN Ze,TIAN Guoqing,XUE Huan..气体绝缘封闭组合开关壳体泄漏原因[J].理化检验-物理分册,2025,61(12):77-81,85,6.基金项目
国网湖北电科院2024年材料专项项目(B11532244341) （B11532244341）
