Abstract:The drawing method for the double channel impeller is studied. It is found that there is an inconformity between the dimensions of plane-view and pinacoid-view of fluid cross-section.The shape of cross-section is an ellipse folded in half through one symmetry axis,and the axis keeps perpendicular with pinacoid-view.Thus the direction of the cross-section is unrelated with center channel curve in plane-view.Traditionally,it is assumed that the cross-section is perpendicular to the center-channel curve.This is not the fact.It is considered that the major cause is resulted from the disagreement among plane view,dimension of cross-section and actual wood former of double channel impeller.A more reasonable design process is proposed.
[1] Frost,Sullian.Submersible pumping in the European sludge treatment industry[J].World Pumps,1998(7):26-29[2] 倪合玉.双流道污水泵叶轮的设计方法与设计实践[J].通用机械,2004(6):67-69[3] 刘厚林,关醒凡,李幼康.双流道叶轮的设计方法[J].流体机械,1999,27(9):15-17[4] 关醒凡.现代泵技术手册[M].北京:宇航出版社,1995:423[5] 鲁求荣,张江平.双流道叶轮叶片绘型[J].排灌机械,2001,19(2):17-18