自吸泵铸造工艺模拟研究

Casting Process Simulation of Self-priming Pump

核电用自吸泵结构复杂,组织要求致密,内外表面要求严格,尤其是内部腔体形成难度极大。从铸造工艺设计、铸造模拟等几个方面探讨了核电用自吸泵铸造工艺设计。结果表明,可以采用3D打印和传统模具制芯相结合的方式获得复杂结构型腔。薄壁件补缩距离短,需要适当增加冒口数量进行补缩,配合冷铁可以实现顺序凝固。通过铸造模拟,优化的铸造工艺方案可行。

Self-priming pump for nuclear power plant has complex structure,compact structure and strict internal and external surface requirements,especially the formation of internal cavity is extremely difficult. The casting process design of self-priming pump for nuclear power was discussed from the aspects of casting process design and casting simulation. The results show that the complex cavity can be obtained by the combination of 3 D printing and traditional die core-making. The feeding distance of thin-walled parts is short,so it is necessary to increase the number of risers for feeding. Sequential solidification can be achieved with the combination of chiller. Through casting simulation,the optimized casting process is feasible.