Abstract:In the research of influence of geometrical parameters of splitter blades on centrifugal pump performance, the regularity of ranking of the parameters and its reliability should be emphasized. Consequently, the comprehensive influence and its regularity of splitter pitch relative to the full length blade β, deflecting angle α, dimensionless inlet diameter and number of blades Z on the pump head and efficiency is analyzed in detail by using the grey theory. The results of the ranking by which the four geometrical parameters influence the head and efficiency are obtained by means of a lot of calculations. The result showed that the effect of the splitter pitch relative to the full length blade β on the pump head was the largest, the deflecting angle α is the smallest, the dimensionless inlet diameter and number of blades Z were in between for all the cases. Meanwhile, the effect of D′on the efficiency was the largest, parameter α was the smallest, β and Z were between them. The repeatability of the ranking of splitter blades parameters is good, and the reliability is high. The results may establish an important base for further study on the hydraulic performance and the optimization design of a centrifugal pump with low specific speed.
参考文献(References)[1]何希杰.离心泵叶轮入口参数最优化设计的研究[J].排灌机械,1987,5(4):18-25.He Xijie.Researching on optimization method for impeller inlet parameters of centrifugal pump[J]. Drainage and Irrigation Machinery,1987,5(4):18-25.(in Chinese)[2]袁寿其.低比速离心泵理论与设计[M].北京:机械工业出版社,1997.[3]袁寿其,张金凤,袁建平,等.用正交试验研究分流叶片主要参数对性能影响[J].排灌机械,2008,26(2):1-5.Yuan Shouqi,Zhang Jinfeng,Yuan Jianping,et al.Orthogonal experimental study effect of main geometry factors of splitter blades on pumpperformance[J].Drainage and Irrigation Machinery,2008,26(2):1-5.(in Chinese)[4]袁建平,李淑娟,付跃登.用正交试验研究分析叶片对离心泵性能的影响[J].排灌机械,2009,27(5):306-309.Yuan Jianping,Li Shujuan,Fu Yuedeng.Splitter blades effect on charactaristics of centrifugal pump by orthogonal experiment[J].Drainage and Irrigation Machinery,2009,27(5):306-309.(in Chenese)[5]齐学义,胡家昕,田亚斌.超低比转数高速离心泵复合叶轮的正交设计[J].排灌机械,2009,27(6):341-346.Qi Xueyi,Hu Jiaxin,Tian Yabin.Orthogonal design of complex impeller of centrifugal pump with superlowspecificspeed[J].Drainge and Irrigation Machinery, 2009, 27(6): 341-346. (in chinese)[6]何希杰,劳学苏.离心泵诸参数对扬程影响程度的研究[J].水泵技术,2000(4):7-8,21.He Xijie,Lao Xuesu.Researching on effect of some parameter on head of centrifugal pump[J].Pump Technology,2000(4): 7-8,21.(in Chenese)[7]何希杰,朱广奇,胡金生.低比转数泵几何参数对扬程综合影响的灰色理论分析[J].排灌机械,2006,24(2):1-3.He Xijie,Zhu Guangqi,Hu Jinsheng.Analysis of comprehensive influence of geometrical parameters on low specific speed pump head by using grey theory[J].Drainage and Irrigation Machinery,2006,24(2):1-3.(in Chinese)[8]北京大学数学系.正交设计法[M].北京:化学工业出版社,1979.[9]邓聚龙.灰色理论基础[M].武汉:华中科技大学出版社,2002.