刚度对三峡水轮发电机组轴系稳定性的影响  

Stability on Shaft of Three Gorges Hydro-generator Influenced by Stiffness

作　　者：姚大坤[1] 邹经湘[1] 赵树山[1] 

机构地区：[1]哈尔滨工业大学

出　　处：《电站系统工程》2005年第3期51-53,共3页Power System Engineering

基　　金：国家自然科学基金重大项目(59493700);国家"十五"重大技术装备研制项目(ZZ01-01-04-03)

摘　　要：用传递矩阵法建立了单圆盘转子横向振动力学模型,研究了陀螺力矩、电磁拉力、刚度等因素对三峡水轮发电机组稳定性的影响,获得了轴系的动刚度曲线。研究表明陀螺力矩使轴系的临界转速显著提高,磁拉力则使临界转速降低。提高上导轴承刚度有利于机组的稳定运行,轴系自身刚度变化对轴系临界转速影响非常小。The lateral vibration mechanical model of model of single disc rotor is created by the transfer matrix method, and stability on shaft of Three Gorges hydro-generator influenced by moment of gyro force, magnetic pull and stiffness is investigated. Dynamic stiffness curve of shaft is obtained. The investigation shows that moment of gyro force raises critical speed of shaft greatly, but magnetic pull reduces the critical speed. To enhance stiffness of upper guide bearing is helpful to the unit operating stably. The critical speed does not almost change with change of shaft stiffness.

关 键 词：水轮发电机组 轴系稳定性 三峡 振动力学模型 临界转速 陀螺力矩 传递矩阵法 稳定运行 轴承刚度 刚度变化 磁拉力 动刚度 

分 类 号：TM312[电气工程—电机] TM311.07