基于ANSYS的轴流式水轮机空心活动导叶结构优化分析

活动导叶是水轮机的主要部件,对水轮机安全稳定运行具有重要作用。本文为提高轴流式水轮机空心活动导叶的刚度,同时控制其材料用量,采用有限元方法,研究了不同导叶瓣体内部结构对其刚度的影响。结果表明:导叶瓣体钢板厚度、纵向筋板厚度和位置以及内伸轴头长度对导叶刚度影响显著;横向筋板和多个纵向筋板对导叶刚度影响不明显。通过对不同结构重量的对比分析,提出轴流式水轮机空心活动导叶的优化结构,为同类型水轮机活动导叶设计提供参考依据。

Optimization of hollow wicket gate of Kaplan turbine based on ANSYS

Wicket gate is a main component of hydro turbine and it plays an important role in safe and stable operation of hydro turbine. To enhance stiffness and control material consumption for the hollow wicket gate of Kaplan turbine, the influence of inner structure of the gate body on its stiffness is studied by using finite element method. The results show that the thickness of gate-face steel plate, the thickness and position of vertical rib slab, and the shaft length inside the body have significant influence on the stiffness while the influence of horizontal rib slab and multiple vertical rib slabs are insignificant. A comparison of wicket gate mass between different structures suggests an optimal structure of the hollow wicket gate, which would be useful for design of similar wicket gates.