某汽轮机阀门密封结构优化分析  

Optimization and Analysis of Sealing Structure for a Steam Turbine Valve

作　　者：师春燕[1] 陈贝贝[1] 章艳[1] 何长川 刘金芳[1] 陈铁宁[1] SHI Chunyan;CHEN Beibei;ZHANG Yan;HE Changchuan;LIU Jinfang;CHEN Tiening(Dongfang Turbine Co.,Ltd.,Deyang Sichuan,618000)

机构地区：[1]东方电气集团东方汽轮机有限公司,四川德阳618000

出　　处：《东方汽轮机》2021年第3期14-19,共6页Dongfang Turbine

摘　　要：文章介绍了某阀门的结构以及受力特点,从密封环受力分析的角度出发,对密封环的结构进行优化分析,得出了2种优化结构。基于密封环材料的弹塑性力学特性,研究了应变硬化指数对本构性能以及接触压力的影响,并分析了应变硬化指数对密封接触压力的影响。结果表明,有限元分析结果与理论分析的高接触应力区域位置基本一致,2种优化结构均能有效提高密封环密封接触压力。机组运行结果表明:密封结构优化后,轴封母管温度显著降低,密封效果与分析结果基本一致。The structural characteristics and stress characteristics of a valve are introduced. From the point of view of stress analysis of sealing ring, the structure of sealing ring is optimized and analyzed, and two optimal structures are obtained. Based on the elastic-plastic mechanical properties of the sealing ring material, the influence of strain hardening index on the constitutive properties and contact pressure was studied. The influence of strain hardening index on the fluctuation of contact pressure is analyzed. The results show that the location of the high contact stress area is basically the same as that of the theoretical analysis.The two optimized structures both can effectively improve the contact pressure of the seal ring and maintain a high stability of the contact pressure. And the operation results of the unit showed that the temperature of the main pipe of the shaft seal decreases significantly after the sealing structure is optimized, and the sealing effect is basically consistent with the analysis results.

关 键 词：密封环 结构优化 应变硬化指数 接触压力 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]