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| Influence of mineral particle size on wear characteristics of deep-sea mining lifting pump |
| SUN Xuelei1, LIU Houlin1, TAN Minggao1*, WU Xianfang2, ZHANG Keke1 |
| 1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract In order to study the effect of particle size on the wear characteristics of overflow components of deep-sea mining lifting pump, the DPM model was used to simulate the solid-liquid two-phase flow in the pump, and the wear of particles on overflow components was simulated by the Oka wear model based on fluid dynamics to analyze the wear law of the lifting pump under different particle sizes. The results show that with the increase of particle size, the wear of the front and rear cover of the first stage impeller and secondary impeller is gradually distributed evenly, and the concentrated area of the wear of the front cover shifts from the outlet pressure surface to the middle of the impeller and the inlet suction surface, and the concentrated area of the wear of the rear cover shifts from the inlet suction surface to the outlet pressure surface, and the wear area of both the inlet and outlet of the vane gradually increases; the inlet wear of the first stage space guide vane and the secondary space guide vane is gra-dually increased. When the particle size increases from 1.0 mm to 5.0 mm, the maximum wear amount of the front cover plate of the first stage impeller and secondary impeller increases 132.9% and 104.2% respectively, and the maximum wear amount of the blades of the first stage impeller and secondary impeller increases 172.3% and 142.5%, respectively. The maximum wear of the rear cover plate of the primary and secondary impellers increased by 251.4% and 102.3%, and the maximum wear of the primary and secondary guide vanes decreased by 87.08% and 74.26%, respectively.
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Received: 16 March 2021
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