| Artificial heart is an effective therapeutic tool for advanced heart failure as the substitute of heart, the donors of which are quite rare recently. It provides advantages such as a lower price and no requirement for matching towards natural hearts. Hydrodynamic performance is the key indicator of blood pump, the core component of an artificial heart. Along with the development of the3rd generation, suspending type, hydrodynamic suspending blood pump becomes more eye-catching.This paper mainly focuses on the structural design of hydrodynamic suspending blood pump by using mechanical mechanism fluid dynamics and so on. With the help of theoretical analysis, numerical simulation and performance test, a research is conducted to optimize the fluid hydrodynamics and hydrodynamic performance. A new type of centrifugal blood pump was designed base on the spiral wedge-gap structure. This paper has conducted the following research1) Structural design of a new type of centrifugal blood pump based on spiral wedge-gap structureBy innovative improvement in the suspending structure, a new type of blood pump was designed. The size and dimensions are calculated and optimized by using numerical simulation and application of theories of flow rate and lift in centrifugal pumps.2) Analysis and calculation of suspending force on the impeller and numerical simulation of hydrodynamics of the pumpThe value of suspending force was estimated by theoretical analysis and verified by numerical simulation. By comparing with each other, we can figure out whether the theoretical analysis is correct.3) Fabrication of the prototype and hydrodynamic performance testA prototype of blood pump was fabricated and series of tests of hydrodynamic performance were conducted to figure out the accuracy of the numerical simulation. Then the performance of the prototype blood pump was assessed. Methods in designing the flow passage components and suspending structure were summarized. |
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