摘要
对某母管制背压式汽轮机机组的主汽-调节阀在定参数快速冷启动过程中的结构强度进行了研究,利用ABAQUS软件建立了主汽-调节阀三维有限元模型,得到主汽-调节阀在启动过程中的温度场和瞬态应力场,将主汽阀测点位置温度计算值与测量值进行了对比,并分析了不同主汽阀开度对主汽阀阀座应力交变行为的影响。结果表明:主汽阀测点位置温度计算值与测量值吻合较好;主汽阀阀座在启动过程中出现了明显的应力交变现象;通过改变主汽阀开度可以有效缓解主汽阀阀座的应力交变现象,降低主汽阀阀座疲劳损伤。
A study was conducted on the structural strength of the main steam valve in a back-pressure turbine unit with manifold piping system during rapid cold startup at fixed parameters. A three-dimensional finite element model was established for the main steam valve using ABAQUS, so as to obtain its instantaneous temperature field and stress field in startup process, compare the calculated and measured temperatures at measuring points, and to analyze the effects of valve opening on the stress alteration. Results show that the calculated temperatures at measuring points of the main steam valve agree well with actual measurements. Obvious stress alteration exists in the main valve seat during startup of the main steam valve, which could be eliminated by changing the valve opening, thus to reduce the fatigue damage of the main valve seat.
作者
陈诗坤
王鹏
蔡振威
洪辉
王炜哲
CHEN Shikun;WANG Peng;CAI Zhenwei;HONG Hui;WANG Weizhe(Key Laboratory for Power Machinery and Engineering of Ministry of Education, School of MechanicalEngineering, Shanghni Jiaotong University, Shanghai 200240, China;Gas Turbine Research Institute. Shanghai Jiaotong University, Shanghai 200240, China;Shanghai Turbine Plant,Shanghai Electric Power Generation Ecjuipment Co., Ltd. , Shanghai 200240, China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2019年第5期360-365,372,共7页
Journal of Chinese Society of Power Engineering
关键词
定参数快速冷启动
主汽-调节阀
温度
应力交变
rapid cold startup at fixed parameters
main steam valve
temperature
stress alteration
