Abstract:The structure and working principle of a self-priming and flow-ejecting spray pump are elaborated.A venturi tube is added in the pump inlet,which connects with the reflux hole in the sixth section of the volute,so as to develop the self-circulation.When the pump starts working,the self-priming process can be achieved,and the water-ejecting valve will be shut off automatically.At this moment,the back-flow system will stop working.Thus,compared with the traditional self-priming spray pump,the efficiency of the new type has been raised by 3%~5%.Through the analysis of performance test for a series of spray pumps it shows that,the performance curve is stable and smooth,the range of high efficiency is wide,and the pump operates under the optimum condition.All the technical indexes of the pump are satisfied.Compared to the traditional types,the efficiency has been raised by(8.9%,) the self-priming time has been shortened by 32 s~60 s,and the weight has been reduced by an average of 15.8%.
刘建瑞;周贵平;施卫东;孔繁余;金树德. 新型高效自吸喷灌泵的设计与试验[J]. 排灌机械工程学报, 2006, 24(4): 1-4.
LIU Jian-rui, ZHOU Gui-ping, SHI Wei-dong, KONG Fan-yu, JIN Shu-de. Design and test of self-priming and flow-ejecting spray pump. Journal of Drainage and Irrigation Machinery Engin, 2006, 24(4): 1-4.