风电增速机行星架铸造工艺的改进

Improvement of Casting Process for Wind-Driven Generator Accelerator Planet Carrier

风电增速机用球墨铸铁行星架内齿孔壁较厚,共晶凝固时间长,凝固膨胀压力大,易产生缩松缺陷。通过对铸件的充型和凝固过程进行数值模拟,对工艺进行了优化。生产实践表明,采用优化的工艺有效地防止了行星架的缩松缺陷,铸件工艺出品率提高15.13%。

Ductile iron planet carder applied in wind-driven generator accelerator has thick wall of inner tooth and it takes a long time to finish eutectic solidification along with a high solidification expansion pressure, which causes the defects of shrinkage porosity. The test casting process is optimized, according to the simulation results of the filling and solidification and the actual casting process. The productive practice indicates that the defect of shrinkage porosity is solved and technological yield of casting increased by 15.13% with the optimized process.