超临界600 MW机组汽轮机转子蠕变特性研究  

Research on creep characteristic of a supercritical 600 MW unit turbine rotor

作　　者：崔亚辉 张俊杰 蒋东翔[2] 陈景明[2] 高健[2] 

机构地区：[1]神华国华(北京)电力研究院有限公司,北京100025 [2]清华大学热能工程系,北京100084

出　　处：《热力发电》2013年第12期69-71,75,共4页Thermal Power Generation

摘　　要：应用多维应力蠕变本构方程及Norton 3参数模型,在给定的温度场和应力场的作用下,对某台超临界660MW机组高中压转子的蠕变特性进行了计算。结果表明:发生蠕变的主要区域为该转子过桥汽封至中压第3级动叶之间的轴段;因蠕变的发生,10 500h后,该转子将发生弯曲,而且随着弯曲的不断发展,弯曲速率将不断增大,尤其是转子中部过桥汽封处的弯曲速率最大。计算结果与该转子的实际弯曲测量结果相符。As the constant commissioning and operation of large-capacity high-parameter units,the creep problem of turbine rotor at high temperature is becoming more and more severe.However, research on creep characteristic of high temperature material in China is still at the primary stage. The multidimensional stress creep constitutive equation and the Norton three-parameter model was applied to describe the creep characteristic of the high/intermediate pressure rotor in a supercritical 660MW unit,and the style of piecewise fitting was adopted to determine the three parameters of the Norton model.The calculation results show that,the creep mainly occurred on shaft between the rotor steam seal and the third stage dynamic blade in medium pressure cylinder;due to the creep,after 10 500hours' operation,the rotor would bend gradually,and the bend rate will be increasing,especially that at the steam seal in middle rotor reached the highest value.The calculation agreed well with the measured results.

关 键 词：600 MW机组 汽轮机 转子 蠕变力学理论 蠕变特性 渐进式弯曲 

分 类 号：TK268.+1[动力工程及工程热物理—动力机械及工程]