摘要
以某具有悬臂蛇形蜿蜒状冷却通道的燃机叶片作为研究对象,通过精密铸造成型方法制备叶片毛坯,并采用Olympus壁厚测量仪获取壁厚点数据,同时结合数值计算软件PROCAST模拟型壳预热过程及充型凝固过程,研究并阐述了型壳/型芯的位移变化及叶片壁厚演化过程。结果表明:叶片壁厚超差的根本原因是型壳预热阶段悬臂型芯发生了张开变形,其与型壳的位置匹配确定了初始壁厚的形成,并影响至后续浇注过程;充型凝固过程因持续时间短,对最终壁厚的形成无显著影响;合金的固态收缩阶段对叶片的轮廓尺寸影响很大。
Taking a gas turbine blade with a cantilevered serpentine cooling channel as the research object,the blade roughcast was prepared by precision casting method,and the wall thickness data were obtained by using the Olympus wall thickness measuring instrument.At the same time,combining with the numerical calculation software PROCAST to simulate preheating process,filling and solidification process,the displacement change of shell core and the evolution process of the blade wall thickness were studied.Results show that the fundamental reason of the blade wall thickness deviation is opening and deformation of the cantilever core during preheating stage of the shell,which determines the initial wall thickness and influences subsequent casting process.Due to short duration of mold filling and solidification process,there is no significant effect on the final wall thickness,and the solid state shrinkage stage of the alloy has a great effect on profile size of the blade.
作者
郭雄
杨啊涛
赵代银
何建
陶飞
张琼元
杨照宏
GUO Xiong;YANG Atao;ZHAO Daiyin;HE Jian;TAO Fei;ZHANG Qiongyuan;YANG Zhaohong(State Key Laboratory of Long-Life High Temperature Materials,Deyang 618000,Sichuan Province,China;Dongfang Turbine Co.,Ltd.,Dongfang Electric Corporation,Deyang 618000,Sichuan Province,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2021年第6期452-459,共8页
Journal of Chinese Society of Power Engineering
关键词
燃机叶片
型芯
铸造
壁厚
gas turbine blade
core
casting
wall thickness
