| 大尺寸固体颗粒对固液两相流输送泵叶轮的磨损 |
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| 引用本文： | 宋龙波,滕爽,曹骞,康灿,丁可金,李长江.大尺寸固体颗粒对固液两相流输送泵叶轮的磨损[J].排灌机械工程学报,2021,39(10):987-993. |
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| 作者姓名： | 宋龙波 滕爽 曹骞 康灿 丁可金 李长江 |
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| 作者单位： | 1. 国家泵类产品质量检验中心(山东), 山东 淄博 255209; 2. 江苏大学能源与动力工程学院, 江苏 镇江 212013; 3. 中国船舶第七○四研究所, 上海 200031 |
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| 摘 要： | 针对大尺寸固体颗粒对输送泵叶轮的磨损问题,借助商用计算流体动力学软件STAR-CCM+开展数值模拟研究.采用变曲率弯管试验结果验证数值模拟模型的物理有效性,进而考虑介质浓度、颗粒粒径对输送泵运行性能和磨损特性的影响.研究结果表明:泵内固体颗粒的分布不均匀,叶片工作面对颗粒做功导致颗粒高速撞击叶片是叶片发生磨损的关键因素.输送泵叶轮的磨损主要发生在叶片的进口边和背面,首级叶轮的磨损量始终大于次级叶轮.介质浓度的增加会导致叶轮磨损量增加.当颗粒粒径由25 mm增加至30 mm时,首级叶轮和次级叶轮的磨损率均出现急剧增长,叶轮的磨损加剧.输送小颗粒时,应着重对叶片的进口角度进行优化,减轻小颗粒对叶片进口边的磨损;输送大颗粒时,应对叶片的型线进行优化,以减少大颗粒对叶片背面的磨损.
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| 关 键 词： | 固体颗粒 输送泵 磨损 介质浓度 颗粒粒径 |
| 收稿时间： | 2020-10-04 |
Wear of large solid particles on the impeller of solid-liquid two-phase flow pump |
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| SONG Longbo,TENG Shuang,CAO Qian,KANG Can,DING Kejin,LI Changjiang.Wear of large solid particles on the impeller of solid-liquid two-phase flow pump[J].Journal of Drainage and Irrigation Machinery Engineering,2021,39(10):987-993. |
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| Authors: | SONG Longbo TENG Shuang CAO Qian KANG Can DING Kejin LI Changjiang |
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| Institution: | 1. National Pump Product Quality Inspection Center(Shandong), Zibo, Shandong 255209, China; 2. School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 3. The 704th Research Institute of CSIC, Shanghai 200031, China |
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| Abstract: | In order to describe the wear of the impeller of the pump transporting the solid-liquid two-phase flow containing large solid particles, commercial computational fluid dynamics(CFD)software STAR-CCM+ was used to implement numerical simulations. The numerical scheme was validated through the experimental results obtained in a curved pipe. Effects of the concentration of the medium and solid particle diameter on performance of the pump and wear characteristics were investigated. The results show that the distribution of solid particles in the pump is uneven, and the work done by the blade working face causes the particles to hit the blade at a high speed, which is the key factor of blade wear. The wear of the impeller mainly occurs at the inlet and back of the blade, and the wear of the primary impeller is always greater than that of the secondary impeller. The increase of medium concentration will lead to the increase of impeller wear. When the particle size increases from 25 mm to 30 mm, the wear rate of the primary impeller and the secondary impeller increases sharply, and the wear of the impeller increases. When transporting small particles, the inlet angle of blade should be optimized to reduce the wear of small particles on the inlet edge of blade. When conveying large particles, the profile of blade should be optimized to reduce the wear of large particles on the back of blade. |
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| Keywords: | solid particle delivery pump wear volumetric concentration of medium solid particle diameter |
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