超超临界600MW汽轮机调节级温度场的分析  

Analysis on Temperature Field of Ultra-supercritical 600 MW Steam Turbine Governing Stage

作　　者：孟召军[1,2] 王光定 孟帅[1,2] 

机构地区：[1]沈阳工程学院能源与动力学院,辽宁沈阳110136 [2]沈阳工程学院研究生部,辽宁沈阳110136

出　　处：《沈阳工程学院学报（自然科学版）》2014年第3期217-220,共4页Journal of Shenyang Institute of Engineering:Natural Science

基　　金：辽宁省教育厅项目(L2010382)

摘　　要：热应力是影响机组性能的重要因素,而其产生的主要因素是温度差。因此,分析汽轮机组在启停过程中温度场的变化规律是研究其应力场的首要条件。根据某电厂600 MW汽轮机组的冷态启动曲线,利用有限元软件,对汽轮机调节级温度场的变化规律进行分析。模拟结果表明,冷态启动状态下调节级的温度梯度存在较大变化,影响了该机组的使用寿命。Thermal stress is an important factor which affects the performance of the turbine, and it is mainly caused by temperature difference. So it is the primary condition for analysis of stress field to study the temperature field of steam turbine in the process of starting and stopping. In this paper, according to the rated curve of cold state start up of a 600 MW steam turbine rotor, the temperature field was analyzed with the finite element software. Results shows that there is a large temperature gradient on governing stage when it is under the cold state start-up, which has an influence on the service life of the turbine, and it provides a theoretical support to optimize the start-up of this model.

关 键 词：调节级 有限元 温度场 汽轮机 

分 类 号：TK263.1[动力工程及工程热物理—动力机械及工程]