理化检验-物理分册2026，Vol.62Issue(8)：5-9,5.DOI:10.11973/lhjy-wl260098
核电厂辅助给水泵导叶断裂原因
Reasons for guide vane fracture of auxiliary feedwater pump in nuclear power plant
王铭昌 1李楠 1车银辉 1杨小虎 1杨曦1
作者信息
- 1. 国家核电厂安全及可靠性工程技术研究中心,苏州 215008||苏州热工研究院有限公司,苏州 215008
- 折叠
摘要
Abstract
During the overhaul and disassembly of the auxiliary feedwater pump at a nuclear power plant,it was discovered that the guide vane fractured.The causes of guide vane fracture were analyzed using macroscopic observation,scanning electron microscopy and energy spectrum analysis,chemical composition analysis,metallographic examination,mechanical property testing,finite element analysis.The results show that there were refractory material inclusions left over from the casting process at the transition corners of the blade side,which damaged the continuity of the substrate surface and caused stress concentration.Under the coupling effect of alternating fluid operation load and structural vibration excitation force,fatigue cracks initiated and continued to propagate at the defect location,ultimately leading to fatigue fracture of the guide vane.关键词
辅助给水泵/导叶/疲劳断裂/铸造缺陷/应力集中Key words
auxiliary feedwater pump/guide vane/fatigue fracture/casting defect/stress concentration分类
通用工业技术引用本文复制引用
王铭昌,李楠,车银辉,杨小虎,杨曦..核电厂辅助给水泵导叶断裂原因[J].理化检验-物理分册,2026,62(8):5-9,5.
