摘要
YL19000kW及以上超大功率烟气轮机轴承箱体体积大、结构复杂、铸造难度大。原模样结构设计不合理,芯盒多,组芯后容易产生错边、夹砂和气孔等铸造缺陷。通过模样结构优化设计,外模体积及芯盒数量减少一半,制模、造型、制芯及合箱工作量大幅减少。通过数值模拟,预测到两处轴承座及底座热节处有显著的缩孔疏松缺陷。采取设置内、外冷铁及调整冒口尺寸等措施,消除了各种铸造缺陷,铸件质量得到了显著提高。
The bearing box of super large power expander above YL19000kW was large in volume,complex in structure and difficult in casting.The original pattern structure design is unreasonable,there are many core boxes,and it is easy to produce casting defects such as shift,sand inclusion and porosity after core assembly.By optimization design of structure,the volume of outer pattern and the number of core boxes were reduced by half,and the workloads of pattern making,molding,core making and mold assembling were reduced greatly.Through numerical simulation for the casting process,it was forecasted that there were remarkable shrinkage and porosity defects at the two bearing blocks and the hot spot of the pedestal.Various casting defects were eliminated by setting the inner and outer chills and adjusting the riser size.The production cost was reduced and the casting quality was improved remarkably.
作者
刘致远
韩云飞
张育龙
张亮亮
LIU Zhi-yuan;HAN Yun-fei;ZHANG Yu-long;ZHANG Liang-liang(School of Bailie Mechanical Engineering,Lanzhou City University,Lanzhou 730070,Gansu,China;School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu,China)
出处
《铸造》
CAS
北大核心
2022年第5期645-649,共5页
Foundry
基金
兰州城市学院博士科研启动基金(LZCU-BS2020-01)。
作者简介
刘致远(1971-),男,博士,副教授,主要从事耐热钢、高温合金、3D打印研发及铸造工艺设计与模拟工作。电话:18693102972,E-mail:2237917198@qq.com。
