Influence of increments of back sealing ring diameter of impeller on characteristic of axial force
Liu Zailun1,2, Li Zhenhua1, Wu Jiao1, Zeng Jilai1
1.College of Energy & Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2.Engineering Institute of Wenzhou Pump & Valve, Lanzhou University of Technology, Wenzhou, Zhejiang 325105, China
Abstract:Reducing the axial force is an important way to improve the service life and efficiency as well as to get higher lift of submersible pumps. With water as the medium, standard k-ε turbulence model in multiple reference frames was used to simulate the whole flow field for unsteady incompre-ssible flow in the 300QJ230-40/2 submersible pump. The overall performance and axial force were numerically obtained, and the simulated performance curves as well as axial force against head were drawn. Mechanical metrical method for axial force was used in the test, and the simulated curves were compared with the test curves of both performance and axial force. The results show that these curves are close to each other under working conditions from 0.8 Qsp to 1.2 Qsp(heads from 46 m to 36 m). With the front sealing ring diameter increment of Δrm≠0, the diameter and number of balance holes of the impeller of constant, numerical calculations and analysis for both the whole flow filed and axial force were conducted, and the results show that the axial force could be effectively reduced by increa-sing the back sealing ring diameter of the impeller.In order to find the way of prediction and evaluation of axial force on similar-designed pumps, dimensionless curves of axial force coefficient and specific area were drawn.
刘在伦,, 李振华, 吴佼, 曾继来. 叶轮后密封环直径加大量对轴向力特性的影响[J]. 排灌机械工程学报, 2013, 31(8): 662-666.
Liu Zailun,, Li Zhenhua, Wu Jiao, Zeng Jilai. Influence of increments of back sealing ring diameter of impeller on characteristic of axial force. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(8): 662-666.
[1]高鸿俐,杨继隆,叶力,等.分段式多级叶片离心泵轴向力的计算[J].化工机械,2000,27(5):254-258. Gao Hongli,Yang Jilong,Ye Li,et al.The calculation of the axial force of the multistage impeller centrifugal pumps[J].Chemical Engineering & Machinery,2000,27(5):254-258.(in Chinese)[2]施卫东,李启锋,陆伟刚,等.基于CFD的离心泵轴向力计算与试验[J].农业机械学报,2009,40(1):60-63. Shi Weidong,Li Qifeng,Lu Weigang,et al.Estimation and experiment of axial thrust in centrifugal pump based on CFD [J].Transaction of the Chinese Society for Agricultural Machinery,2009,40(1):60-63.(in Chinese)[3]陆伟刚,张金凤,袁寿其.离心泵叶轮轴向力自动平衡新方法[J].中国机械工程,2007,18(17):2037-2040. Lu Weigang,Zhang Jinfeng,Yuan Shouqi.A new method to axial thrust self-balance for centrifugal pump impeller[J].China Mechanical Engineering,2007,18(17):2037-2040.(in Chinese)[4]李琪飞,刘在伦,李仁年,等.加大叶轮后密封环平衡轴向力的理论分析[J].排灌机械,2004,22(4):1-2. Li Qifei,Liu Zailun,Li Rennian,et al.Theoretical research the balancing axial thrust by increasing the back sealing ring of the impeller[J].Drainage and Irrigation Machinery,2004,22(4):1-2.(in Chinese)[5]刘在伦,王保明,梁森.浮动叶轮平衡腔压力的试验分析[J].排灌机械,2007,25(4):29-32. Liu Zailun,Wang Baoming,Liang Sen.Experimental study on the pressure in the balancecavity of floating impeller[J].Drainage and Irrigation Machinery,2007,25(4):29-32.(in Chinese)[6]王福军,黎耀军,王文娥.水泵CFD应用中的若干问题与思考[J].排灌机械,2005,23(5):6-8. Wang Fujun,Li Yaojun,Wang Wene.Analysis on CFD application in water pumps[J]. Drainage and Irrigation Machinery,2005,23(5):6-8.(in Chinese)[7]刘在伦,李琪飞.水力机械测试技术[M].北京:中国水利水电出版社,2009.[8]周岭,施卫东,陆伟刚,等.深井离心泵数值模拟与试验[J].农业机械学报,2011,42(3):69-73. Zhou Ling,Shi Weidong,Lu Weigang,et al. Numerical simulation and experiment on deep-well centrifugal pump[J].Transactions of the Chinese Society for Agricultu-ral Machinery,2011,42(3):69-73.(in Chinese)[9]Lu Weigang,Zhou Ling,Zhang Desheng,et al. Unteady flow numerical analysis of new-type deep well pump under muticonditions [C]//Proceedings of the ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting,2010(1):647-652.[10]王秀勇,王灿星,黎义斌.离心泵泵腔内流动特征的数值分析[J]. 农业机械学报, 2009,40(4):86-90. Wang Xiuyong,Wang Canxing,Li Yibin.Numerical study of flow characteristics in the impeller side chamber of centrifugal pump[J].Transactions of the Chinese Society for Agricultural Machinery,2009,40(4):86-90.(in Chinese)[11]王福军.计算流体动力学分析——CFD软件原理与应用[M].北京:清华大学出版社,2004:89-125.