CAJ | 학술논문

通过对近年来我国汽轮机组汽流激振故障案例进行整理，归纳分析了汽流激振事故原因，得出蒸汽激振力过大和轴瓦稳定性差这两个方面为汽流激振的主要原因．从发生部位、低频振动频率特征、低频振动振幅变化、与运行参数的关系以及其他相关特征几个方面分析了汽流激振的主要振动特征．根据分析结果，总结提出了汽流激振故障诊断的依据，并提出采用降低蒸汽激振力、提高轴瓦稳定性等主要措施预防汽流激振故障，为机组安全稳定运行提供技术参考．
통과대근년래아국기륜궤조기류격진고장안례진행정리，귀납분석료기류격진사고원인，득출증기격진력과대화축와은정성차저량개방면위기류격진적주요원인．종발생부위、저빈진동빈솔특정、저빈진동진폭변화、여운행삼수적관계이급기타상관특정궤개방면분석료기류격진적주요진동특정．근거분석결과，총결제출료기류격진고장진단적의거，병제출채용강저증기격진력、제고축와은정성등주요조시예방기류격진고장，위궤조안전은정운행제공기술삼고．
By analyzing the steam-excited vibration faults occurring in domestic steam turbine unit in recent years, the failures are found to be caused by too large excitation force and poor bearing stability. Main features of the steam-excited vibration are analyzed from the aspects of vibration location, characteristic frequency of low-frequency vibration, amplitude variation of low-frequency vibration, the relationship between vibration and operation parameters, and other related factors, etc. Based on above analysis, relevant fault diagnosis criteria are proposed, while corresponding countermeasures suggested, such as reducing the steam exciting force and improving the bearing stability, etc. , which may serve as a reference for safe operation of steam turbine unit.