%A CONG Xiao-qing, YUAN Shou-qi, YUAN Dan-qing %T Research the Designing Method of Semi-opened Sewage Pump Impeller %0 Journal Article %D 2001 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.2001.06.005 %P 15-16 %V 19 %N 6 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_849.shtml} %8 2001-11-25 %X According to the experimental study on varied blade numbers of semi-opened impeller, thispaper researches the designing method of semi-opened impeller, introduces the experience formula and theexperience parameters during the procedure of designing impeller. The effect of the blade numbers and theblade edge clearances on the pump performance are studied in detail and some problems met in the procedureare discussed.