Theoretical and experimental research on influence of rotor taper on performance of cone-shape helical pumps

• Published in: 高技术通讯（英文版） Vol. 25; no. 2; pp. 174 - 181
• Main Authors: Zhao Jianhua, Gao Dianrong, Liu Shichang
• Format: Journal Article
• Language: English
• Published: Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control , Yanshan University, Qinhuangdao 066004, P.R.China 01.06.2019
• Subjects: cone-shaped helical pump; flow condition; rotor taper; energy consumption; circumfluence
• ISSN: 1006-6748
• DOI: 10.3772/j.issn.1006-6748.2019.02.008

The structure of a rotor has full impact on the performance of cone-shaped helical pumps .Nu-merical simulation and experimental tests are applied to get pressure , velocity and flow of a cone-shaped helical pump , and explores flow condition of blood in artificial blood pump .Rotors with four different tapers of artificial pump are designed .The flow condition of blood at the entrance , near the front diffuser , near the rotor , near the rear diffuser and at the exit , the pressure difference between entrance and exit and flow of artificial blood pump with different taper rotors are simulated , and then the influence rules of rotor taper on the performance of cone-shaped helical pump are revealed .In order to verify the correctness of theoretical analysis , rotors with three different tapers are manufac-tured , physical model of artificial blood pump are built , and then the actual lift and flow of blood pump with different rotors are measured respectively .The results show that taper of rotor increases , the circumfluence of blood near the front and rear diffuser decreases , the blood flows more smoothly , the energy consumption is less , and then the guide role of blade is greater .The blood at the exit of blood pump flows along the axial direction steadily .As taper of rotor increases , the pressure differ-ence between the entrance and exit and the flow of blood pump increase subsequently .The flow con-dition of blood and performance of blood pump with No .3 rotor are the best .The proposed research analyzes the influence of rotor taper on performance of blood pump quantitatively , and provides the theoretical reference for the design and improving of cone-shaped helical pump .