Structure Design And Performance Simulation Of Centrifugal Maglev Artificial Heart Pump

In 21st century, Heart failure is the most challenging epidemic cardiovascular disease faced by people, which is one of the major causes of death in global. End-stage heart failure patients only have to accept heart transplants to delay their lives. However, various factors have led to a serious lack of heart donors, tissue engineering and cell engineering can't achieve heart cloning in short term, all of these led to the extreme shortage of heart transplants.This paper mainly focuses in Centrifugal Maglev Artificial Heart Pump, the main contents are followed below:(1) It firstly describes the history, the current situation and the development tendency of artificial heart pump, and then analyzes operating principle and features of the centrifugal maglev artificial heart pump.(2) It firstly establishes the SOLID WORKS model of heart pump, especially the impellers'flow surface design and modeling, and then establishes the heart pump's blood flow models for meshing, after that selects the standard k-εturbulence model, the standard WALL function method and the SIMPLE pressure-velocity coupling algorithm for the heart pump flow field simulation by FLUENT software.(3) It has compared the simulation results about the relationship of the axial fluid gap, impeller speed and blade installation angle, then obtained the relationship between the axial fluid gap and the max local shear stress in the pumping course.(4) It firstly analyzes the force conditions of impeller rotor, then designed and analyzed the maglev supporting for building the maglev supporting model, finally designed the electromagnets and analyzed its supporting magnetic field by ANSYS software.(5) It firstly established the supporting control system model of magnetic impeller rotor, carried out the maglev impeller rotor's supporting performance simulation by PID control under the initial position, showed that the PID control system can achieve good supporting control of the maglev impeller rotor. After that, it carried out lots of supporting performance simulation analysis based on different PID controller, found out the influence of the PID parameters to supporting control of impeller rotor.