变工况下汽轮机中压缸轴端汽封沟槽的热应力分析  

Thermal Stress Analysis of Elasticity Slot for Steam Turbine Under Variable Operating Conditions

作　　者：张亦弛 王雷 ZHANG Yi-chi;WANG Lei(School of Energy and Power,Shenyang Institute of Engineering,Shenyang 110136,Liaoning Province;College of International Education,Shenyang Institute of Engineering,Shenyang 110136,Liaoning Province)

机构地区：[1]沈阳工程学院研究生部,辽宁沈阳110136 [2]沈阳工程学院国际教育学院,辽宁沈阳110136

出　　处：《沈阳工程学院学报（自然科学版）》2020年第4期38-41,45,共5页Journal of Shenyang Institute of Engineering:Natural Science

摘　　要：在汽轮发电机组启动过程中,由于汽轮机轴端汽封沟槽的温度梯度会不断变化,导致应力值处于较高水平,对转子材料的寿命造成损伤。因此,运用ANSYS有限元软件对某汽轮机转子中压缸轴端汽封槽部位在不同的启动时间段进行仿真模拟,揭示了汽轮机轴端汽封在变工况下的温度场及热应力的分布规律,为保证机组运行的安全性和稳定性提供了理论依据。In the start-up process of turbine,the turbine shaft end seal groove of the temperature gradient is in constant change,which will cause the stress value at a higher level,and is likely to be the life of the rotor material damage.The steam sealing groove at the axial end of a steam turbine rotor under different starting periods is simulated with ANSYS software,and the temperature field and thermal stress distribution of the steam turbine axial end under different sealing conditions are revealed,which provides a theoretical basis for ensuring the safety and stability of the unit operation.

关 键 词：弹性槽 热应力 有限元 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]