(1.Technical and Research Center of Fluid Machinery Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;2.Guangdong Foshan Pump Factory Co.,Ltd,Foshan,Guangdong 528000,China)
Abstract：In order to balance the large axial force on the SWRO-HP pump,a program for calculating the axial thrust equilibrator is written by the VB 6.0,and a special equilibrator making up with balancing disc and balancing sleeve is designed by using the program.In order to get a better sensitivity on the balancing disc,the connection between the diameter of balancing disc and the force bear by the balancing piston is studied by using the program.The force bear by the balancing piston is 70%,and the range of sensitivity is 0.23～0.28,Based on these the size of geometry for equilibrator is confirmed.In order to avoid the end-plate of balancing disc to contact friction,the connection about the change of b2 and equilibrant is worked out by using the program.Compared with the test,the difference of the leakage rate is just 5.11%.The problem of large axial thrust which is brought by the SWRO-HP pump is successfully solved by the equilibrator.The leakage is 2.6% of the SWRO-HP pump′s flow rate,far less than the general multi-stage pump.
[1]Ghazi A E.Design consideration of RO units:case studies[J].Desalination,2002,153:281-286.[2]Grundisch A,Schneider B P.Optimising energy consumption in SWRO systems with brine concentrators[J].Desalination,2001,138:223-229.[3]Stover R L.Seawater reverse osmosis with isobaric energy recovery devices[J].Desalination,2007,203:168-175.[4]关醒凡.现代泵技术手册[M].北京:宇航出版社,1995.[5]赵万勇,刘天宝,梁森.多级泵三间隙平衡盘间隙流动的理论分析[J].兰州理工大学学报,2006,32(6):62-64.Zhao Wanyong,Liu Tianbao,Liang Sen.Theoretical analysis of fluid flow within gaps in three-gap balance disc of multi-stage-section pump[J].Journal of Lanzhou University of Technology,2006,32(6):62-64.(in Chinese).[6]许贤良,朱兵,张军,等.同心环形缝隙流理论研究[J].安徽理工大学学报:自然科学版,2004,24(3):40-42.Xu Xianliang,Zhu Bing,Zhang Jun,et al.The research of the concentric ring slit flow[J].Journal of Anhui University of Science and Technology:Natural Science Edition,2004,24(3):40-42.(in Chinese)[7]赵万勇.多级泵平衡盘间隙流动的理论分析[J].水泵技术,2001(1):21-23.Zhao Wanyong.The theoretical analysis of clearance flow for balance disc in multistage pump[J].Pump Technology,2001(1):21-23.(in Chinese)[8]赵万勇,张亮,王振,等.多级泵平衡盘灵敏性优化设计[J].排灌机械,2008,26(4):14-17.Zhao Wanyong,Zhang Liang,Wang Zhen,et al.Structural optimization design of balance disc in multistage pump for better sensitivity[J].Drainage and Irrigation Machinery,2008,26(4):14-17.(in Chinese).[9]明日科技.Visual Basic 应用开发完全手册[M].北京:人民邮电出版社,2006.
