摘要
对某1 000 MW核电汽轮机低压内缸进行了三维建模,并进行有限元分析,计算了稳定运行工况下,负荷、上下缸温差以及抽真空过程对轴封变形的影响。计算结果表明：在温度、压力的综合作用下,并受汽缸变形影响,轴封变形膨胀,向内倾斜。其中低压内缸内外压差是造成轴封向内倾斜的主要原因,同时上下缸温差也是造成轴封内倾的原因之一。汽缸受热膨胀会减轻轴封的向内倾斜程度。
In this paper, the 3 D modeling of LP inner casing for a 1 000 MW nuclear steam turbine has been established,and the finite element analysis has been carried out using ANSYS WORKBENCH soft- ware. We have calculated and analyzed the influence of load, temperature difference between upper and lower casing and vacuum pumping process on the deformation of gland seal under the stable operating conditions. The results show that the gland seal expands and tilts inwards due to the combined action of temperature and pressure, and the deformation of the casing. The pressure difference between inside and outside of the casing is the main cause for the gland seal tilt, while the temperature difference between upper and lower casing is also one of the reasons. The expansion of the casing can reduce the inclination of the gland seal.
作者
梅子岳
郭亚楠
谢诞梅
黄祥君
MEI Zi-yue;GUO Ya-nan;XIE Dan-mei;HUANG Xiang-jun(The Laboratory of Transients in Hydraulic Machinery,The Key Laboratory of Ministry of Education,Wuhan University,Wuhan,China,Post Code ： 430072;China General Nuclear Power Group Co.,Ltd.,Shenzhen,China,Post Code ： 518028)
出处
《热能动力工程》
CAS
CSCD
北大核心
2018年第11期28-35,共8页
Journal of Engineering for Thermal Energy and Power
关键词
低压内缸三维建模
有限元分析
负荷
上下缸温差
抽真空
轴封变形
LP inner casing 3D modeling
finite element analysis
load
temperature difference between upper and lower casing
vacuum pumping
gland seal deformation
