核主泵口环密封动力学特性数值研究  

Numerical study on the dynamic characteristics of a reactor coolant pump ring seal

作　　者：冯德玮 延方泉 韩宝华 庞敏超 黎义斌[1] 王岩[3] FENG Dewei;YAN Fangquan;HAN Baohua;PANG Minchao;LI Yibin;WANG Yan(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Nuclear Power Pump Co.,Ltd.,Shenyang Blower Works Group,Shenyang 110869,China;Science and Technology on Research System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu 610213,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]沈阳鼓风机集团核电泵业有限公司,辽宁沈阳110869 [3]中国核动力研究设计院核反应堆系统设计技术重点实验室,四川成都610213

出　　处：《哈尔滨工程大学学报》2024年第2期298-305,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51866009);国防基础科研计划(JCKY2019427D001)。

摘　　要：为了研究口环密封对核主泵转子动力学特性的影响,本文以“华龙一号”核主泵密封口环为研究对象,应用转子动力学理论,建立小扰动模型下的涡动转子动力学方程,基于CFD准稳态方法,对密封间隙域内部流场进行数值模拟,探究转速、压差及口环结构对转子动力学特性以其稳定性的影响。结果表明:转速和压差越大,涡动比对密封力的影响效果越显著,刚度系数、阻尼系数的绝对值呈增大趋势,转速对交叉刚度系数和交叉阻尼系数影响显著,平面密封和迷宫密封交叉刚度系数分别增加了6.92倍和4.13倍,交叉阻尼系数分别增加了15.4倍和6.25倍;压差对直接刚度系数影响明显,平面密封与迷宫密封直接刚度系数分别增加了6.2倍和9.1倍。同时迷宫密封对应的涡动系数Ω_(f)小于平面密封,稳定性优于平面密封结构。To study the influence of a seal ring on the rotor dynamic characteristics of a reactor coolant pump,con-sidering the seal ring of a Hua-long pressurized reactor 1000 coolant pump as the research object and applying the rotor dynamics theory,the whirl rotor dynamic equation under the small disturbance model was established.Based on the CFD quasi-steady state method,the internal flow field of the seal clearance region was numerically simulated to explore the effects of speed,pressure difference,and ring structure on the dynamic characteristics and stability of the rotor.The results reveal that the greater the speed and pressure difference are,the more important the effect of the whirl ratio on the sealing force is,and the absolute values of the stiffness and damping coefficients increase.Rotation speed has a considerable effect on the cross-stiffness and cross-damping coefficients.The cross-stiffness coefficients of the plane seal and the labyrinth seal increase by 6.92-fold and 4.13-fold,respectively,and the cross-damping coefficients increase by 15.4-fold and 6.25-fold,respectively.The pressure difference has a consid-erable effect on the direct-stiffness coefficient,which increases by 6.2-fold and 9.1-fold for the plane and labyrinth seals,respectively.Simultaneously,the labyrinth seal has a smaller vortex coefficientΩ_(f) and better structural sta-bility than the plane seal.

关 键 词：口环密封 刚度系数 阻尼系数 转子稳定性 核主泵 数值模拟 动力特性 口环结构 

分 类 号：TB42[一般工业技术]