CAJ | 학술논문

某电厂#5凝结水泵进行以节能为目的的变频改造,运行频率由固定频率50Hz调整为40～45Hz后泵体振动加大,并发生泵轴断裂事故。本文利用化学成分、力学性能、金相组织、扫描电镜等手段系统分析了该泵轴断裂原因,分析结果认为该泵轴断裂为典型高周疲劳断裂,断口形式为沿晶脆断,断裂源包括脆性氧化物夹杂相及变频改造后变化载荷在泵轴圆周处形成的微裂纹。
모전엄#5응결수빙진행이절능위목적적변빈개조,운행빈솔유고정빈솔50Hz조정위40～45Hz후빙체진동가대,병발생빙축단렬사고。본문이용화학성분、역학성능、금상조직、소묘전경등수단계통분석료해빙축단렬원인,분석결과인위해빙축단렬위전형고주피로단렬,단구형식위연정취단,단렬원포괄취성양화물협잡상급변빈개조후변화재하재빙축원주처형성적미렬문。
The variable frequency reformation of the condensate pump No.5 in a power plant was accomplished for energy-saving,and the operation frequency can be adjusted in range of 40Hz to 45Hz.After the reformation,the vibration of the pump body was enlarged,and the shaft was fractured.The reasons of the accident were researched by means of chemical component analysis,the mechanical properties analysis,the metallographic structure analysis and the electron microscope scanning,and it has been shown that the pump shaf...