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首页> 外文期刊>Artificial Organs >Optimal design of the hydrodynamic multi-arc bearing in a centrifugal blood pump for the improvement of bearing stiffness and hemolysis level.
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Optimal design of the hydrodynamic multi-arc bearing in a centrifugal blood pump for the improvement of bearing stiffness and hemolysis level.

机译：离心血泵中流体动力多弧轴承的优化设计，以提高轴承的刚度和溶血水平。

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摘要

The purpose of the present study is to establish an optimal design of the multi-arc hydrodynamic bearing in a centrifugal blood pump for the improvement of bearing stiffness and hemolysis level. The multi-arc bearing was designed to fulfill the required specifications: (i) ensuring the uniform bearing stiffness for various bearing angles; (ii) ensuring a higher bearing stiffness than the centrifugal force to prevent impeller whirl; and (iii) adjusting the bearing clearance as much as possible to reduce hemolysis. First, a numerical analysis was performed to optimize three design parameters of the multi-arc bearing: number of arcs N, bearing clearance C, and groove depth H. To validate the accuracy of the numerical analysis, the impeller trajectories for six pump models were measured. Finally, an in vitro hemolysis test was conducted to evaluate the hemolytic property of the multi-arc bearing. As a result of the numerical analysis, the optimal parameter combination was determined as follows: N?=?4, C?=?100?μm, and H?≥?100?μm. In the measurements of the impeller trajectory, the optimal parameter combination was found to be as follows: N?=?4, C?=?90?μm, and H?=?100?μm. This result demonstrated the high reliability of the numerical analysis. In the hemolysis test, the parameter combination that achieved the smallest hemolysis was obtained as follows: N?=?4, C?=?90?μm, and H?=?100?μm. In conclusion, the multi-arc bearing could be optimized for the improvement of bearing stiffness and hemolysis level.
机译：本研究的目的是在离心血泵中建立多弧流体动力轴承的最佳设计，以提高轴承的刚度和溶血水平。多弧轴承的设计符合要求的规格：（i）确保各种轴承角度的均匀轴承刚度; （ii）确保比离心力更高的轴承刚度，以防止叶轮旋转; （iii）尽可能调整轴承间隙以减少溶血。首先，进行了数值分析，以优化多弧轴承的三个设计参数：弧数N，轴承间隙C和凹槽深度H。为验证数值分析的准确性，对六个泵模型的叶轮轨迹分别进行了分析。测量。最后，进行了体外溶血试验，以评估多弧轴承的溶血性能。数值分析的结果，最佳参数组合确定如下：N≥4，C≥100μm，H≥≥100μm。在叶轮轨迹的测量中，发现最佳参数组合如下：N≥4，C≥90μm，H≥100μm。该结果证明了数值分析的高度可靠性。在溶血试验中，获得最小溶血的参数组合如下：N≥4，C≥90μm，H≥100μm。总之，可以优化多弧轴承以提高轴承刚度和溶血水平。

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