水轮发电机电磁振动及噪声的分析和改造

摘要:

针对福建 G 电站投运后发电机出现的振动大、噪声高的问题，从电磁振动的基本原理出发，分析了引起电磁 振动的力波波谱，计算了电磁振动的幅值，得出了原有设计分数次谐波含量过高、定子铁心轭部过小是产生电磁振动 超标的根本原因; 同时，根据分析结果提出了相应改造措施。改造后的定子大幅度地消除了电磁振动与噪声。

Abstract:

Aiming at the excessive vibration and intensive noise of Fujian G power station，the force wave spectrum which causes electromagnetic vibration is analyzed based on the basic electromagnetic vibration theory，and the vibration amplitude is calculated． The research shows that the fundamental reason that causes the vibration is the excessive harmonic and small size of stator core yoke． According to the analysis results，the corresponding reform measures are proposed． The electromagnetic vibration and noise are reduced obviously after the technical reform．