Experiment on Effect of Blade Pattern on Performance of Centrifugal Oil Pumps
Li Wenguang, Su Fazhang, Ye Zhiming,Xia Dingliang(2)
(1 Hydraulic Machinery Division Gansu University of Technology, 730050 Lanzhou, China)
(2 Shanghai Kaiquan Pump Group Co., 200436 Shanghai, China)

Abstract: Based on one kind of centrifugal oil pump of type 65Y60, the effect of blade pattern on the performance of the pump is investigated at various viscosity conditions. First, two impellers with three-dimensional blade shape are constructed. The two kinds of the blade patterns of the impellers are designed in inverse design problem mode by using the quasi-three dimensional blade design program, which is developed by the authors. The front parts of the patterns differ from that of original impeller which is designed by using one-dimensional theory, but the rear parts of patterns is same as that of original one. Then the comparative performance tests are conducted for the three impellers at various viscosity conditions. The results show that the alteration of blade pattern near the blade inlet affects the performance of the pump largely. The proper increase of the fluid dynamic load coefficient on blade surfaces on the hub stream surface helps to improve the performance of the pump for pumping viscous oil.
Keywords: Centrifugal oil pump, blade pattern, performance, viscous oil, quasi-three dimensional design, inverse design problem.