Study Of Structural Parameters Impacting On The Cone Axis Blood Pump Performance

Conical screw axis blood pump is a kind of artificial heart assist devices which isused widely in the world. The driving device is electromagnetic drive, which uses themagnetic field coil generated by the DC power and magnets within the rotor suspensiontogether, canceling lead wire wear. As no wires penetrate the body when the pump works,it can greatly reduce the human body infection, while the blood pumps have theadvantages of less mechanical wear and tear, higher energy efficiency.With the rapid development of computer technology and the increasinglysophisticated numerical techniques in the21st century, they provide a great help to thestudy of artificial blood pumps. We can use advanced computer simulation technology tosimulate the output characteristics of the blood pump, saving research time anddevelopment costs. And, it becomes more and more effective to use the numericalcalculation method to study the blood flow field inside the pump. These performanceissues of pumping flow, pressure of the cone-shaped helical magnetic axis pump blood,remain to be improved, we study the structure of the blood pump with numericalsimulation, theoretical analysis and experimental analysis, to find the law which thestructure of the blood pump impact on the blood pump performance, for the future studyfoundation of the structure of the blood pump.In this paper, the blood pump structure includes the following aspects: number ofrotor blades, rotor pitch, rotor taper, leaf shape of import and export guide wheel andimport and export guide wheel blades. The blood pump performance parameters include:pressure of blood pump, flow of blood pump and distribution of flow inside the bloodpump. Firstly, the blood pumps with the different structural parameters model, mesh, setthe parameters, with the Computational Fluid Dynamics (called CFD for short) simulationsoftware, the blood pumps which have the different structural parameters are simulated.Secondly, according to the numerical results, analyze and compare the law of differentstructural parameters impacting on blood pump performance, and choose the bestoptimized structural parameters. Finally, based on the best structure for optimal bloodpump prototype with comparative analysis, build experimental platform, test the performance parameters of the blood pump, test and analyze the flow rate, pressure andother parameters of performance.