摘要
通过总结分析国内外汽轮机组转子裂纹故障案例,归纳得出振动、应力集中、热应力及环境腐蚀为转子裂纹的主要原因,并得到振动特征及故障特征变化发展趋势.提出了转子裂纹故障诊断的依据,并提出采用减少机组调峰运行次数、延长启停暖机时间、控制振动水平及重点监测裂纹多发部位等措施预防转子裂纹故障.
By analyzing the cases of rotor cracks in turbine-generator units at home and abroad, the crack faults are found to be caused mainly by vibration, stress concentration, thermal stress and environmental corrosion, etc. Development tendencies of both the vibration and cracking are revealed, while the basis for fault diagnosis of rotor cracks proposed. Countermeasures for prevention of rotor cracks are simultaneous- ly put forward, such as reducing the times of peaking operation, prolonging the warming-up period during start-up and shut-down, controlling the vibration level and concentrating on examining the areas where cracks frequently occur.
出处
《动力工程学报》
CAS
CSCD
北大核心
2012年第4期289-295,320,共8页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(51075146)
中央高校基本科研业务费专项资金资助项目
关键词
汽轮发电机组
转子
裂纹
故障原因
振动特征
变化趋势
turbine-generator unit
rotor
crack
fault cause
vibration feature
development tendency
