Optimization Design of the Impeller Based on Orthogonal Test in an Ultra-Low Specific Speed Magnetic Drive Pump

Fei Zhao, Fanyu Kong, Yisong Zhou, Bin Xia and Yuxing Bai
Additional contact information
Fei Zhao: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Fanyu Kong: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Yisong Zhou: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Bin Xia: School of Mechanical Technology, Wuxi Institute of Technology, Wuxi 214121, China
Yuxing Bai: School of Automotive & Rail Transit, Nanjing Institute of Technology, Nanjing 211167, China

Energies, 2019, vol. 12, issue 24, 1-21

Abstract: To improve the hydraulic performance in an ultra-low specific speed magnetic drive pump, optimized design of impeller based on orthogonal test was carried out. Blades number Z , bias angle in peripheral direction of splitter blades θ s , inlet diameter of splitter blades D si , and deflection angle of splitter blades α were selected as the main factors in orthogonal test. The credibility of the numerical simulation was verified by prototype experiments. Two optimized impellers were designed through the analysis of orthogonal test data. The internal flow field, pressure fluctuation, and radial force were analyzed and compared between optimized impellers and original impeller. The results reveal that impeller 7 ( Z = 5, θ s = 0.4 θ , D si = 0.75 D 2 , α = 0°) could increase the head and efficiency, compared to the original impeller, by 2.68% and 4.82%, respectively. Impeller 10 (Z = 5, θ s = 0.4 θ , D si = 0.55 D 2 , α = 0°) reduced the head by 0.33% and increased the efficiency by 8.24%. At design flow rate condition, the internal flow of impeller 10 was the most stable. Peak-to-peak values of pressure fluctuation at the volute tongues of impeller 7 and impeller 10 were smaller than those of the original impeller at different flow rate conditions (0.6 Q d , 1.0 Q d and 1.5 Q d ). Radial force distribution of impeller 10 was the most uniform, and the radial force variance of impeller 10 was the smallest.

Keywords: ultra-low specific speed magnetic drive pump; orthogonal test; splitter blades; optimized design; pressure fluctuation; radial force (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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