冲击式水轮发电机转轮的铸造工艺设计

结合钢的流动特点和凝固特性，综合考虑充型过程及补缩效果，通过局部锆砂实现铸件的顺序凝固，设计旋转对开式芯盒成形形状比较复杂的水斗砂芯，利用三维建模软件及有限元分析对转轮进行了结构分析及优化，利用计算机模拟软件对铸件工艺参数进行了设计和优化。针对模拟后铸件可能出现的缺陷，提出了相应的改进措施。优化了浇注系统，合理设计冷铁和冒口，并确定了合理的铸造工艺参数范围，实现了转轮砂型铸造的成形方法。

Casting Process Design of Runner for Pelton Turbine Generator

Combined with the flow and solidification characteristics of molten steel, the filling process and feeding effects were considered comprehensively. The directional solidification of castings was realized by zircon sand in partial mold. The rotary split core box was designed for more complex basin sand core. The structure of runner was analyzed and optimized with three-dimensional modeling software and finite element analysis, and the technological parameters of casting were designed and optimized with computer simulation software. The corresponding improvement measures were put forward for casting defects that may occur after simulation. The gating system is optimized, and the denseners and risers are designed reasonably. The rational casting process parameters are determined to realize the runner forming with sand casting process.