Study on hump performance of multistage centrifugal pump mixed with different impellers
In view of the problem that the head of the multi-stage centrifugal pump in the small flow area is easy to produce hump and unstable operation,an improved scheme of mixed assembly of impeller with different hydraulic power was proposed,and the effectiveness of improving lift hump was verified by comparison test.The results show that the mixed assembly of impeller A with 5 blades and 23.7 mm outlet width with impeller B with 3 blades and 33.6 mm outlet width better improves the lift hump in the small flow area of multistage centrifugal pump.The pump efficiency is 75.7%after mixed assembly of impeller A with 76%efficiency and impeller B with 75%efficiency,and the pump efficiency will not be sacrificed for improving the hump.Compared with the traditional method of improving the hump of head by changing the number of blades,blade outlet angle,impeller outlet width and other parameters of the hydraulic model of a single impeller,it is more convenient and flexible,and will not sacrifice the efficiency of the pump by improving the hump.The research results can provide reference for improving the design method of lift hump of multistage centrifugal pump.
万方数据
维普
