大型风电二级行星架铸钢件质量的控制

Quality Control of Steel Castings for Large Wind Power Secondary Planetary Frames

针对大型风电机组二级行星架铸件的内花键区域(长轴端内孔)超声波探伤不合格、立柱根部裂纹及冒口切割难度大等问题,运用华铸CAE数值模拟技术对此铸钢件的铸造工艺进行仿真分析,得出缺陷形成的位置及原因。研究冒口系统后,制定了相应的工艺优化方案,有效消除了铸造缺陷,保证了铸件内部质量,提高了工艺出品率,降低了产品成本。

In view of the problems such as unqualified ultrasonic flaw detection in the internal spline area(long shaft end inner hole)of the second stage planetary frame castings of the large wind turbine,cracking in the root segment of the upright column and difficult riser cutting,the casting process of the steel casting was simulated and analyzed by using the CAE numerical simulation technology of InteCAST software,and the position and reason of the defect formation were obtained.Consequently,the measures of corresponding process optimization were taken,which effectively eliminated the casting defects,guaranteed the internal quality of the castings,improved the process yield and reduced the product cost.