Abstract：For traditional high flow self-priming centrifugal pumps are subject to poor self-priming performance and low efficiency, a large flow self-priming centrifugal pump with a new self-priming structure is designed. In the design, a high-pressure jet is involved into the gas exhaust system of the pump, then the structure of jet nozzle is designed carefully and reasonably, and their main dimensions are decided accordingly. Moreover, a check valve is designed as well for the nozzle, and a globe valve with good air tightness is chosen. A new coupling-clutch transmission device is put forward, in which the shafts of the pump and a compressor are connected with a pulley to ensure the compressor to be detached quick after the self-priming completion. A compressor is selected according to the requirement on the exhaust by the pump and relevant national technical standards. Experiments on the self-priming performance of the newly designed self-priming pump are carried out, and the priming times at different suction heights are recorded. The experimental results show that the self-priming times are 62, 92, 121 and 173 s, respectively, when the suction heights are 5.3, 6.0, 7.0 and 8.1 m. These self-priming times are less than those specified in relevant national technical standards. Thus, for the pump, its advantage in the self-priming performance is not only obvious, but the overall efficiency of the pump unit is also improved significantly.
武永生, 刘建瑞, 李红, 陈凯, 常浩. 新型自吸离心泵自吸结构设计与试验研究[J]. 排灌机械工程学报, 2016, 34(7): 579-583.
WU Yongsheng, LIU Jianrui, LI Hong, CHEN Kai, CHANG Hao. Design and test of new self-priming structure for self-priming centrifugal pump. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(7): 579-583.
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