大型汽轮发电机组轴承支撑动反力特性研究  

Research on the Bearing Support Dynamic Reaction Force Characteristics of Large Turbo-generator

作　　者：宗曜犇 傅行军[1] 张德利[2] 岳健国 王旭[1] 郭瑞[1] ZONG Yao-ben;FU Xing-jun;ZHANG De-li;YUE Jian-guo;WANG Xu;GUO Rui(National Engineering Research Center of Power Generation Control and Safety,Southeast University,Nanjing 210096,China;North China Electric Power Research Institute Co.,Ltd.,Beijing 100045,China)

机构地区：[1]东南大学大型发电装备安全运行与智能测控国家工程研究中心,南京210096 [2]华北电力科学研究院有限责任公司,北京100045

出　　处：《汽轮机技术》2022年第4期289-291,294,共4页Turbine Technology

摘　　要：在原有转子-轴承模型的基础上考虑了轴承座的刚度及参振质量的影响,建立了转子-轴承-轴承座动力特性耦合分析模型,深入研究了轴承座的参振质量、刚度系数及转子振动幅值对基础支撑动反力的影响特性。结果表明:考虑到轴承座参振质量及刚度后,轴承座动反力会在转子转速达到略高于轴承座的固有频率附近出现峰值,峰值所对应的转速随参振质量的增加而降低;在同一轴振幅值下,轴承座动反力随参振质量的增大而增大;增加轴承座的刚度会提高固有频率,也相应提高了转子系统在该频率的临界转速。In this paper,based on the rotor bearing model and considering the influence of bearing pedestal,a coupling analysis model of rotor-bearing-pedestal dynamic characteristics is established.Using this model,the influence characteristics of the mass,stiffness coefficientandrotor vibration amplitudeon the dynamic reaction force of the foundation support were studied.The results show that considering the vibration mass and stiffness of the bearing pedestal,the dynamic reaction force of the bearing pedestal will peak when the rotor speed is slightly higher than the natural frequency of the bearing pedestal,and the speed corresponding to the peak will decrease with the increase of the vibration mass.Under the same shaft amplitude,the dynamic reaction force of bearing pedestal increases with the increase of vibration mass.Increasing the stiffness of the bearing pedestal will increase the natural frequency and the critical speed of the rotor system.

关 键 词：轴承座 动力特性 动反力 

分 类 号：TK263.64[动力工程及工程热物理—动力机械及工程]