精密铸造三级动叶片缩松和缩孔缺陷的预测  

Prediction of Shrinkage Defects in a Third Class Moving Turbine Blade by Invested Casting

作　　者：薛祥 尹成明[1] 周彼德[1] 田竞[1] 张跃冰[1] 高亚龙[2] 孙勤[2] 袁世友[2] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江省哈尔滨150001 [2]哈尔滨汽轮机厂有限责任公司,黑龙江省哈尔滨150046

出　　处：《铸造》2002年第4期228-231,共4页Foundry

摘　　要：采用SolidEdge造型软件和SRIFCast网格剖分软件作为前处理平台 ,实现了三级动叶片三维实体造型及非均匀网格的自动剖分。开发了铸件三维充型过程流体流动与传热的耦合模拟计算机程序。利用XUE判据和Niyama判据对三级动叶片凝固过程中缩松和缩孔缺陷的出现位置进行了预测。结果表明 :XUE判据能够准确预测三级动叶片铸件中缩松和缩孔缺陷出现的位置 ,对实际生产有一定的指导意义。By adopting the solid modeling software Solid Edge and the enmeshment software SRIFCast as the pre processing platform, the third class moving turbine blade was three dimensionally modeled and automatically enmeshed. A three dimensional software code for simulation of fluid flow and heat transfer was developed. The XUE Criterion and Niyama Criterion were used to predict the positions of the shrinkage defects occurring in the solidification process of the turbine blade. The results showed that the XUE could precisely predict the positions of the shrinkage defects in the turbine blade casting. It is a significant tool to practice production.

关 键 词：精密铸造 三级动叶片 缩松缩孔判据 缺陷预测 舰艇 燃汽轮机 

分 类 号：TG249.5[机械工程—精密仪器及机械]