深槽型主泵机械密封液膜特性分析  

Analysis of Liquid Film Characteristics of Deep-groove Reactor Coolant Pump Mechanical Seal

作　　者：金乐 王岩[2] 崔怀明[2] 朱向东 张超南 毛远帆 Jin Le;Wang Yan;Cui Huaiming;Zhu Xiangdong;Zhang Chaonan;Mao Yuanfan(Shanghai Electric-KSB Nuclear Pumps&Valves Co.,Ltd.,Shanghai,201306,China;Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]上海电气凯士比核电泵阀有限公司,上海201306 [2]中国核动力研究设计院,成都610213

出　　处：《核动力工程》2022年第5期203-210,共8页Nuclear Power Engineering

摘　　要：采用结合三维有限元分析与基于经典摩擦理论的密封液膜流场分析相结合的方法,针对某新型核反应堆冷却剂泵(简称核主泵)机械密封的6种密封面方案进行分析研究,对比各方案的液膜厚度、接触载荷、名义磨损率、低压泄漏率等关键参数。计算结果表明,6 mm槽宽的设计方案是一组性能较为平衡的设计,其密封面的性能输出特征与某进口成熟机械密封类似且略优于进口型号;带有低压补偿的直线槽方案能够大幅延长密封面寿命,但同时带来了更高的低压泄漏率。By combining the three-dimensional finite element analysis method and the sealing liquid film flow field analysis based on the classical friction theory,six sealing surface schemes of the mechanical seal of a new type of nuclear reactor coolant pump(referred to as the nuclear main pump)are analyzed and studied.The key parameters such as liquid film thickness,contact load,nominal wear rate,and low pressure leakage rate of each scheme are compared.The calculation results show that the design scheme with a groove width of 6 mm is a set of designs with relatively balanced performance,and the performance output characteristics of the sealing surface are similar to that of an imported mature mechanical seal and slightly better than that of the imported model;The linear groove scheme with low-pressure compensation can greatly prolong the service life of the sealing surface,but also bring a higher low-pressure leakage rate.

关 键 词：核主泵 机械密封 流体动压 直线槽 槽型优化 

分 类 号：TL353.12[核科学技术—核技术及应用]