基于UG的混流式水轮机转轮叶片实体建模方法研究

3D Solid Modeling Method of Francis Turbine Blade Based on UG

对混流式水轮机转轮叶片进行了实体建模方法的研究。基于UG NX 4.0强大的实体化曲面处理能力,从叶片木模图提供的数据出发,采用NURBS方法建立了叶片型面的空间样条曲线模型,由此来构建叶片空间型面。同时提出了混流式水轮机转轮叶片自由曲面延展的新解决办法,并在此基础上建立了完整的叶片实体模型。叶片表面光滑性检查结果验证了该实体建模方法的可行性;完整实体模型的建立为后续叶片的分析及数控加工奠定了基础。

In this paper, research is done on 3D solid modeling method of Francis turbine blades. Based on powerful capacity of materializing surface of UG NX 4.0 and the data of wooden patterns, the blade spline modeling is established by NURBS, and the blade space surface is constructed. Meanwhile, a new method of the free surface extension of Francis turbine blades is introduced, and based on this, a complete solid model of blade is established. The results of smoothness test of runner blades show that this solid modeling method is feasible. 3D solid model lays a good foundation for analysis and CNC machining of follow-up blades.