摘要
汽轮机转子是机组最脆弱的设备,其使用寿命代表了整个机组的寿命,而在启动过程中转子所承受的等效应力最大,因此掌握不同启动方式下机组寿命的情况尤为重要。将某电厂汽轮机组作为仿真算例,对以冷态正暖和背压倒暖2种方式启动的机组进行三维建模、网格划分以及温度场和应力场的模拟分析,并进行寿命评估计算,得出2种启动方式下的机组寿命损耗,比较2种启动方式的优劣,为不同机组选择合适的启动方式提供合理的建议。
The turbine rotor is one of the most fragile components of the power plant,whose life is equal to the life of the unit.The rotor is subjected to the maximum equivalent stress during the process of start-up or shutdown,so it is particularly important to grasp the life of the unit under different starting modes.A power plant was taken as an example to build three-dimensional model,mesh,and analyzed temperature field and stress field of the unit under the forward warming and backward warming ways,and the life of the unit was finally evaluated.The life loss of the unit under two starting modes was obtained and the advantages and disadvantages of the two starting modes were compared to provide reasonable suggestions for selecting suitable starting mode for different units.
作者
李国庆
崔崇
何青
LI Guoqing;CUI Chong;HE Qing(School of Energy Power and Mechanical Engineering,North China Electric Power University,Changping District,Beijing 102206,China;Guodian Boiler and Pressure Vessel Inspection Center,Changping District,Beijing 102209,China)
出处
《发电技术》
2019年第6期580-586,共7页
Power Generation Technology
基金
中央高校基本科研业务费专项资金资助项目(2017XS050)~~
