摘要
针对大型汽轮发电机端部结构固定比较薄弱极易发生事故的特点,提出了采用镜像原理、比奥萨格尔定律和叠加原理计算定子绕组端部电磁力密度解析式的方法。以国产600MW大型汽轮发电机端部结构为分析对象,对沿圆周分布的各个线棒鼻端同一段处和几个关键点的径向和切向电磁力密度的分析结果表明,不同时刻切向力最大值出现的位置是有规律的,且径向和切向电磁力是一个数量级的,总体上看径向电磁力大于切向电磁力,但就最大值而言,径向电磁力是小于切向电磁力的。计算仿真结果为发电机端部结构的固定和事故的预防提供了参考。
A method to deduce the electromagnetic force expressions of end windings based on the image theory,the Biot-Savart law and the superposition principle is proposed as the end structure frame of large-capacity turbo-generator is weak and easily to occur accident.On the basis of a 600 MW home made large-capacity turbo-generator,the results obtained by analyzing the same segment of each end bar that distributed along the circumference and the key points demonstrate that,the position of the tangential electromagnetic force maximum is regular at different moments,and the radial and tangential electromagnetic force are the same quantity,the radial electromagnetic force is bigger than tangential electromagnetic force in the whole,but the maximum radial electromagnetic force is less than the maximum tangential electromagnetic force.The simulation results provide some references for the fixture of the end structure and the prevention of the accident.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2013年第3期488-493,530,共6页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(51177046)
河北省自然科学基金资助项目(E2011502024)
中央高校基本科研业务费专项资金资助项目(12MS101)
关键词
汽轮发电机
定子绕组端部
径向电磁力
切向电磁力
turbo-generator,stator end winding,radial electromagnetic force,tangential electromagnetic force
