Abstract:The centrifugal charging pump is multistage and double casing structure. The hydraulic performance of the pump needs to satisfy five operating conditions according to the demands of nuclear power plant. A technique that combinated various impeller hydraulic optimization design and impeller multi-condition design was put forward. A centrifugal charging pump was designed at multi-condition. The combination rules of multi-stage centrifugal pumps were applied to split the multi-condition points of the charging pump. An optimized design scheme from different impellers performance curves was obtained. The 1st stage impeller, 2nd-4th stage impellers and 5th-12th stage impellers were designed. A four-stage pump prototype(n=2 950 r/min) was manufactured according to the design scheme and its performance test was carried out. The test results scaled to normal speed of 4 500 r/min show that the heads of four operating conditions are 2.6% larger than that of requirements, and just the head at maximum flow rate is 11.8% lower than that of requirments. The multi-condition hydraulic design is realized.
[1]欧阳予,汪达升.国际核能应用及其前景展望与我国核电的发展[J].华北电力大学学报:自然科学版,2007,34(5):1-10.Ouyang Yu, Wang Dasheng. International nuclear power application and its prospect forecast and our country nuclear electricity development[J].Journal of North China Electric Power University: Natural Science Edition,2007,34(5):1-10.(in Chinese)[2]许德忠, 孔令杰, 林冲. CPR1 000 MW核电站上充泵介绍[J]. 水泵技术,2007(6):9-14.Xu Dezhong, Kong Lingjie, Lin Chong. Introduce of CPR1 000 MW nuclear power plants charging pump[J]. Pump Technology, 2007(6):9-14.(in Chinese)[3]Neumann B. The Interaction Between Geometry and Performance of a Centrifugal Pump[M]. London: Mechanical Engineering Publications Limited, 1991.[4]李世煌. 叶片泵的非设计工况及其优化设计[M]. 北京:机械工业出版社,2006.[5]袁寿其. 低比速离心泵理论与设计[M]. 北京:机械工业出版社,1996.[6]Joseph P V. Centrifugal and axial pump design and off-design performance[R]. US:National Aeronautics and Space Administration, 1995:17-21.[7]Sun J, Tsukamoto H. Off-design performance prediction for diffuser pumps[J]. Journal of Power and Energy, 20015(2):191-201.[8]Cheah K W, Lee T S, Winoto S H, et al. Numerical flow simulation in a centrifugal pump at design and off-design conditions[J].International Journal of Rotating Machinery,2007:1-8.[9]Wang Hong,Tsukamoto Hiroshi. Experimental and numerical study of unsteady flow in a diffuser pump at off-design conditions[J]. Journal of Fluids Engineering, 2003,125(9):767-778.[10]Wuibaut G, Bois G, Dupont P. PIV measurements in the impeller and the vaneless diffuser of a radial flow pump in design and off-design operation conditions[J]. Journal of Fluids Engineering,2002,124(9):791-797.