摘要
推导建立了水轮发电机组系统动力学方程。对运动微分方程进行数值积分,分析了发电机转子的质量偏心及水轮机转子的质量偏心对水轮发电机组系统横向振动特性的影响。数值分析结果表明,发电机转子、水轮机转子的横向振动及大轴在上、下导轴承和水导轴承处的横向振动,经过充分衰减后,轴心轨迹都是圆形,但它们的半径并不相同。随着发电机转子的质量偏心的不断增加,大轴在3个导轴承处的横向振动出现了明显分岔现象,振动为周期1及复杂的拟周期运动。大轴在3个导轴承处的横向振动,随着水轮机转子的质量偏心的不断增大,没有出现分岔现象。
The kinetic equation for a hydrogenerator set system was deduced. The motion differential equation was simulated using numerical methods. Considering the effect of the mass eccentricity of generator rotor and hydraulic turbine rotor, the lateral vibration characteristics of the hydrogenerator set system were analyzed. Simulation results display that with the lateral vibration be fully attenuated, the axis orbits of generator rotor and hydraulic turbine rotor etc are circular curves whereas their radiuses are not identical. There appears bifurcation phenomenon of the main shaft＇ s lateral vibration at three guide bearings with the increasing of mass eccentricity of the generator rotor. But there isn＇ t bifurcation phenomenon of the main shaft＇ s with the increasing of mass eccentricity of the hydraulic turbine rotor.
出处
《润滑与密封》
CAS
CSCD
北大核心
2008年第12期40-43,共4页
Lubrication Engineering
基金
国家自然科学基金重点项目(50539140)
科技部水利部公益性行业科研专项经费项目(200701008)
国家自然科学基金项目(50579022)
关键词
水轮发电机组
质量偏心
横向振动
分岔
hydrogenerator set
mass eccentricity
lateral vibration
bifurcation
