结构参数对锥形螺旋血泵性能影响的研究

发布时间：2018-07-03 17:02

本文选题：心室辅助装置 + 锥形螺旋血泵　；参考：《燕山大学》2012年硕士论文

【摘要】：锥形螺旋轴流血泵是目前世界上应用比较广泛的一种人工心脏辅助装置。其驱动装置为电磁驱动，即采用直流通电线圈产生的磁场与转子内的永磁体共同作用使转子旋转，取消导线穿引。由于不需要导线穿入身体，因此能大大降低人体机能感染，同时，锥形轴流血泵还有机械磨损小，能效比高等优点。 21世纪高速发展的计算机技术配合以日趋成熟的数值计算技术，对人工血泵的研究提供了很大的帮助。因此完全可以利用先进的计算机仿真技术模拟血泵的输出特性，大大节省研究时间和研制成本。并且，用数值计算方法来研究血泵内部的流场分布已能取得很好的效果。本文针对锥形螺旋轴流血泵泵血流量、压强性能有待提升的问题，采用数值模拟、理论分析和试验分析相结合的方法对血泵的结构进行分析研究，，找出血泵结构对血泵性能影响的规律，为以后血泵结构的研究打下基础。本文研究的血泵结构主要包括以下几个方面：转子叶片数、转子螺距、转子锥度、进出口导轮叶片形状和进出口导轮叶片数。研究的血泵性能参数主要包括：血泵泵血压强、血泵流量和血泵内部流场分布。首先，对不同结构参数的血泵进行建模、划分网格、设置参数，采用计算流体动力学(Computational Fluid Dynamics，简称CFD)仿真软件，对不同结构参数的血泵进行数值模拟。其次，根据数值模拟结果分析对比得到不同血泵结构参数对血泵性能的影响规律，优选最佳结构参数。最后，基于对比分析优选的最佳结构血泵样机，搭建实验平台，测试血泵泵血情况，对流量、压强等性能参数进行测试和分析。
[Abstract]:The conical spiral shaft bleeding pump is a kind of artificial heart assist device which is widely used in the world. Its driving device is electromagnetic drive, that is, the magnetic field produced by DC coils and permanent magnets in the rotor are used together to make the rotor rotate and lead the wire to be eliminated. Because no wires are needed to penetrate into the body, it can greatly reduce the infection of human function, at the same time, the conical shaft bleeding pump also has little mechanical wear. The rapid development of computer technology in the 21st century with the increasingly mature numerical calculation technology has provided a great help for the study of artificial blood pump. Therefore, the advanced computer simulation technology can be used to simulate the output characteristics of the blood pump, which greatly saves the research time and development cost. In addition, the numerical calculation method has been used to study the flow field distribution in the blood pump. Aiming at the problem that the blood flow and pressure performance of the conical screw shaft bleeding pump need to be improved, the structure of the blood pump is analyzed and studied by the methods of numerical simulation, theoretical analysis and experimental analysis. To find out the influence of the structure of bleeding pump on the performance of blood pump, lay a foundation for the study of the structure of blood pump in the future. The structure of blood pump studied in this paper mainly includes the following aspects: rotor blade number, rotor pitch, rotor taper, inlet and outlet guide wheel blade shape and number of inlet and outlet guide wheel blades. The parameters of blood pump performance include: high blood pressure, blood pump flow and internal flow field distribution. Firstly, the blood pump with different structure parameters is modeled, meshed, and the parameters are set. The blood pump with different structure parameters is numerically simulated by CFD (Computational fluid Dynamics) simulation software. Secondly, according to the results of numerical simulation, the influence of different blood pump structure parameters on the performance of blood pump is obtained, and the optimal structure parameters are selected. Finally, based on comparative analysis of the optimal structure of the blood pump prototype, build the experimental platform, test the blood pump, flow, pressure and other performance parameters are tested and analyzed.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH789

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