热态启动负温度匹配对转子应力及寿命影响分析  

Impact Analysis of the Negative Temperature Mismatch of Hot Start-up on the Stress and Life of Rotors

作　　者：李勇[1] 王晓波[1] 

机构地区：[1]东北电力大学能源与动力工程学院,吉林132012

出　　处：《汽轮机技术》2015年第2期133-135,共3页Turbine Technology

基　　金：吉林省科技发展计划重点项目(20110409)

摘　　要：以某电厂330MW汽轮机转子为研究对象,选取调节级及其高压压力级第一级为隔离体,运用ANSYS有限元软件建立二维轴对称模型,得到不同负温度匹配情况下的冲击热应力和启动过程中的最大应力,进而计算出启动过程中低周疲劳寿命损耗。结果表明:小幅度的负温度匹配不会影响启动过程的安全性,由此引起疲劳寿命损耗增加也很小。This paper takes a certain 330 MW power plant turbine rotor as the research object. Choose the governing stage and the first high pressure stage as isolator to build a two-dimensional axisymmetric model. This paper got the thermal shock stress and maximum equivalent stress during start-up procedure under the condition of different temperatures mismatch with the help of the finite element analysis software ANSYS. The low cycle fatigue life consumption in the process of the start-up is calculated. The results show that the small latitude negative steam temperature mismatch will not impact security,thus reducing the fatigue life loss little.

关 键 词：热态启动 温度匹配 等效应力 寿命损耗 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]