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浙江大学学报(工学版)
J4  2011, Vol. 45 Issue (8): 1393-1398    DOI: 10.3785/j.issn.1008-973X.2011.08.011
    
Internal clearance flow and leakage loss in multi-stage
centrifugal pump
WU Da-zhuan, XU Bin-jie, WU Peng, LI Zhi-feng, WANG Le-qing
Institute of Process Equipment, Zhejiang University, Engineering Research Center of High Pressure Process
Equipment and Safety, Ministry of Education, Hangzhou310027, China
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Abstract  

To investigate the influence of the annular seal on the hydrodynamic performance and the clearance leakage characteristics in multi-stage centrifugal pump, a high-pressure centrifugal pump model containing impeller, guide vane and annular seal was established to simulate the three-dimensional flow field. The hydrodynamic performance and leakage flux of the multi-stage pump under different operating conditions were obtained. The flow structure in the impeller clearance was analyzed. The numerical results of the whole model with impeller clearance are similar to the experimental results, and the calculation leakage flux is closer to empirical formula at best efficiency point of pump. The leakage loss of high pressure multi-stage centrifugal pump can’t be ignored. The inverse flow in the impeller clearance was alleviated and the loss in the impeller outlet decreases with flow rate increasing. On the contrary, the loss in the impeller inlet increases because of the large flow rate and serious leakage.

Published: 08 September 2011
CLC:  TH 311  
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Cite this article:

WU Da-zhuan, XU Bin-jie, WU Peng, LI Zhi-feng, WANG Le-qing. Internal clearance flow and leakage loss in multi-stage
centrifugal pump. J4, 2011, 45(8): 1393-1398.

URL:

https://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2011.08.011     OR     https://www.zjujournals.com/eng/Y2011/V45/I8/1393


多级离心泵内部间隙流动与泄漏损失

为研究多级离心泵前后密封口环对整体水力性能和容积损失的影响，以某高压离心泵为分析模型，建立叶轮、导叶和密封环一体化的整体模型并进行了三维流场模拟，得到不同工况下多级泵的水力性能和口环间隙泄漏量，分析间隙内的流场结构.结果表明，考虑环形间隙结构的全模型性能预测结果与试验值取得较好的一致，在设计点附近的泄漏量预测值与经验公式计算结果接近.高压多级离心泵内部泄漏损失对性能存在明显的影响，间隙内的回流和叶片出口处的损失随流量增加而减小，相反地，叶轮入口处的损失因流量和间隙泄漏量增加而增大.

［1］ BASKHARONE E.A, WYMAN N.J. Primary/Leakage flow interaction in a pump stage ［J］. ASME Journal of Fluid Engineering, 1999, 121(3): 133-138.
［2］ 赵伟国.基于CFD的离心泵口环间隙流动研究［D］.武汉:华中科技大学,2006:4,27-28,47-49.
ZHAO Weiguo. Research on wearrings of centrifugal pump based on CFD code ［D］. Wuhan: Huazhong university of science and technology, 2006: 4,27-28,47.
［3］ 李文广,费振桃,蔡永雄.离心油泵叶轮口环间隙对性能的影响［J］.水泵技术,2004,36(5): 7-13.
LI Wenguang, FEI Zhentao, CAI Yongxiong. Effects of wear ring clearance of the impeller on centrifugal oil pump performance ［J］. Pump Technology, 2004.36(5): 7-13.
［4］ 关醒凡.泵的理论与设计［M］.北京：机械工业出版社,1987: 343-349.
［5］ 刘在伦,魏烈江,齐学义,等.新型轴向力平衡装置间隙泄漏量的计算［J］.农业机械学报,2005, 36(12): 74-76,80.
LIU Zailun, WEI Liejiang, QI Xueyi, et al. Calculation of gap leakage flow rate in new axial trust device［J］. Transactions of the Chinese Society for Agricultural machinery, 2005, 36(12): 74-76,80.
［6］ 林建忠,阮晓东,陈邦国,等.流体力学［M］.北京：清华大学出版社,2005：9.
［7］ 何立东,叶小强,霍耿磊.叶尖密封流场的细观特性对叶轮机械性能的影响［J］.润滑与密封,2006, 176 (4): 171-174,142.
HE Lidong, YE Xiaoqiang, HUO Genglei. The influence of mesoscopic characteristic of tip seal flow field on turbo machinery ［J］.Lubrication Engineering, 2006, 176 (4): 171-174,142.
［8］ 王洋,张翔.叶轮口环间隙对低比转速离心泵效率的影响［J］.排灌机械,2008,11,26(6): 27-30.
WANG Yang, ZHANG Xiang. Effect of clearance of impeller wearrings on efficiency of low specific speed centrifugal pump［J］. Drainage and Irrigation Machinery, 2008, 11,26(6): 27-30.
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