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| Influence of geometric parameters of front wear-ring of a vertical self-priming pump on its self-priming performance |
| ZHAO Weiguo1,2*, QIANG Huanhuan1, XU Qiang1, LIU Mingjian1 |
| 1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. Key Laboratory of Fluid Machinery and System of Gansu Province, Lanzhou University of Technology, Lanzhou, Gansu 730050, China |
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Abstract In order to explore the influence of the geometric parameters of the front wear-ring of a vertical self-priming pump on its self-priming performance, this study takes the 350WFB-1200-50 externally mixed sealless vertical self-priming pump as the research object. With other parameters unchanged, a total of 20 solutions were designed by changing the numerical values of the anterior orifice ring gap δ and the anterior orifical ring length l. Using a research method that combines numerical calculation and experimental verification, the external characteristic curve of each design scheme and the pressure difference between the inlet and outlet of the front wear-ring are obtained through steady numerical calculation, and the gas volume distribution cloud map of the middle section at different times of each design scheme was obtained through unsteady numerical calculations. The change diagram of the gas content rate at the outlet of the self-priming pump of each design scheme and the self-priming completion time curve of each design scheme were used to study the influence of the geometric parameters of the front wear-ring on its self-priming performance. The study found that the front wear-ring clearance δ and the front wear-ring length l have an effect on the self-priming performance of the self-priming pump, appropriately reducing the front wear-ring clearance δ and increasing the front wear-ring length l can improve the self-priming performance of the self-priming pump, and when the front wear-ring clearance δ is too large, the effect of the front wear-ring clearance δ on the self-priming performance of the self-priming pump is larger than the effect of the front wear-ring length l on the self-priming performance of the self-priming pump.
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Received: 08 July 2022
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