Xue Cong, Chen Yu, Zhu Bin, Wang Xiuying
Department of Cardiology, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China.
School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China.
Heliyon. 2023 Mar 6;9(3):e14313. doi: 10.1016/j.heliyon.2023.e14313. eCollection 2023 Mar.
In this work, the hydrodynamic characteristics of spiral groove bearing in centrifugal rotary blood pump is investigated for the cases with different structural parameters. The simulation model is proposed based on the CFD technology and the effectiveness of simulation model is demonstrated by the published data. Then, the pressure, load carrying capacity and friction torque are calculated and the characteristics of pressure distribution are analyzed. It is found that the structural parameters of spiral groove would lead to the complex pressure distribution of blood film and the load carrying capacity also changes at the same time. Moreover, the deep analysis of structural characteristics for spiral groove bearing is conducted based on the orthogonal design method, which could improve the computational efficiency of hydrodynamic behavior of spiral groove bearing. And, the mapping relationship between structural parameter and hydrodynamic performance of bearing preferably is also illustrated.
在这项工作中，针对不同结构参数的情况，研究了离心式旋转血泵中螺旋槽轴承的流体动力学特性。基于计算流体力学（CFD）技术建立了仿真模型，并通过已发表的数据验证了仿真模型的有效性。然后，计算了压力、承载能力和摩擦扭矩，并分析了压力分布特性。研究发现，螺旋槽的结构参数会导致血膜压力分布复杂，同时承载能力也会发生变化。此外，基于正交设计方法对螺旋槽轴承的结构特性进行了深入分析，这可以提高螺旋槽轴承流体动力学行为的计算效率。并且，还阐述了轴承结构参数与流体动力学性能之间的映射关系。
