Design of new  nonclogging selfpriming sewage pump

ZHAO Baitong, YE Binbin, TAO Renhe, CAO Guowei, WU Fei
(Zhejiang Institute of Mechnical & Electrical Engineering Co., Ltd., Hangzhou 310002, China)

Abstract: Aiming at the problems of easy clogging blade and uneasy replacing wear plate for the ZW series selfpriming sewage pump, improved design was carried out. The features and design concepts of new  nonclogging selfpriming sewage pump were introduced. The configuration of the pump was analyzed and the method of hydraulic and structural design was given. The influences of the front water supply channel warehouse, rotor component and circumfluence hole on selfpriming sewage pump were studied. The prototype of new nonclogging selfpriming sewage pump was designed and trialmanufactured, and  the test verification of prototype was carried out. The results show that the pump has the advantages of good nonclogging performance, short selfpriming time, strong wear resistance, high reliability, easy to use and maintenance, etc.. The pump performance curve accords with the design requirement. The design target is reached and an useful reference for future related work is provided.
Key words: nonclogging; selfpriming sewage pump; hydraulic design; structural design