%A WANG Yan-yan, LI Hong, JI Liu-jin %T Research based on CAD system of drawing meridional plane in impeller of centrifugal pump %0 Journal Article %D 2006 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.2006.03.002 %P 5-8 %V 24 %N 3 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_1254.shtml} %8 2006-05-25 %X The method of drawing the centrifugal pump impeller meridional plane in the CAD system is by trying and collecting,that to say is,by modify the data again and again to adapt the design.This method causes blindness.In this article,the author puts forward to the method of flow path center line to design impeller from the flow path center line of excellent hydraulic model,and meanwhile using mathematics statistic and non-linear regression to deal with the data.The function between the numbers of average n_s and the points of flow path center lines can be obtained.On this foundation,the F-L curve and educe the equation of front and behind blades were deduced,which provides the whole course of drawing meridional plane.Examples show that method is feasible and has very high practical value.