斜流泵复合空间导叶结构流场及强度分析

Flow Field and Strength Analysis of Composite Space Guide Blade Structure of Inclined-flow Pump

空间导叶对改善斜流泵叶轮出水流场起着重要作用,为探究空间导叶不同结构形式下流场特征及强度计算,基于长短导叶复合结构形式建立三种导叶结构方案,分别进行流场计算和流固耦合分析。结果显示,三种类型复合空间导叶结构中T_2型空间导叶压力较大,T_3型空间导叶压力最小;三种类型复合空间导叶中压力较大区域主要集中在导叶与上盖板连接处的进水口位置,该处受到较强的水流冲击,承受的压力较大;T_1和T_2型复合空间导叶变形整体均呈对称性分布,T_1型复合空间导叶变形最大点主要集中于下盖板进口边以及导叶与上下盖板连接处,且与下盖板连接处应力值较大;T_3型复合空间导叶变形点主要集中于导叶与下盖板连接处,该处变形最为严重。研究结果为斜流泵不同空间导叶结构的设计优化提供参考。

Space guide blade plays an important role in the improvement of impeller flow field for inclined-flow pump. In order to explore flow field characteristics and strength calculation under different structural forms of space guide blade,flow field calculation and hydraulic characteristics analysis are carried out respectively on the basis of three types of space guide blade structure established by the form of composite structure of space guide blade. The results shows that in the three types of composite space guide blade structure,the pressure of T_2 space guide blade is larger,and the pressure of T_3 space guide blade is minimum;the larger pressure zone is mainly concentrated on the positions of the inlet of space guide blade and the upper cover plate connection,because there are a stronger current rush and a greater pressure; the deformations of T_1 and T_2 composite guide blade are symmetry on the whole,which maximum deformation of T_1 is mainly focused on the lower cover inlet edge and the junction of guide blade and upper,lower cover plates,where the stress value of the connecting point of the lower cover plate is larger; the maximum deformation of T_3 is mainly concentrated on the connection of guide blade and the lower cover,in which the deformation is the most serious. The conclusions provide references for design optimization of different space guide blade structure for inclinedflow pump.