轴向间隙对离心式血泵效率及溶血性能分析  

Analysis on Efficiency and Hemolysis Performance of Centrifugal Blood Pump with Axial Clearance

作　　者：肖义平 肖媛[1] 曹展硕 连起龙 崔国民[1] 王金阳 XIAO Yiping;XIAO Yuan;CAO Zhanshuo;LIAN Qilong;CUI Guomin;WANG Jinyang(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Zhangjiagang Sea Land Thermal Energy Equipment Co.,Ltd.,Zhangjiagang 215600,Jiangsu,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]张家港海陆热能设备有限公司,江苏张家港215600

出　　处：《医用生物力学》2025年第2期404-411,共8页Journal of Medical Biomechanics

基　　金：国家自然科学基金项目(21978171,51976126);中国科学博士后基金项目(2020M671171)。

摘　　要：目的探究不同间隙情况(上下轴向间隙相等、上下轴向间隙其一变化和叶轮轴向偏移)对血泵效率、溶血性能影响。方法通过计算流体力学对3种间隙情况的血泵进行数值模拟。结果对于效率,上下轴向间隙相等、下轴间隙不变及叶轮轴向偏移时减小上轴间隙可提高血泵效率,分别提高0.85%、1.71%、2.90%。上轴间隙不变下轴间隙减小呈现相反趋势,减小1.18%。对于溶血,在前两种间隙情况下增大间隙均可减小溶血指数,而叶轮轴向偏移会增大溶血指数,其中上轴间隙不变下轴间隙为0.3 mm时溶血指数最大,为8.65×10^(-4);上下轴向间隙为0.7 mm时溶血指数最小,为4.51×10^(-4)。结论改进血泵间隙有助于优化血泵性能。研究结果可为血泵间隙结构设计与优化提供一定参考。Objective To study the effects of different clearance conditions(equal upper and lower axial clearance,change of upper/lower axial clearance,axial displacement of blades)on efficiency and hemolysis performance of blood pump.Methods The blood pumps under three kinds of clearance conditions were numerically simulated by computational fluid dynamics.Results For efficiency,when the upper and lower axial clearance was equal,the lower axial clearance was unchanged and the upper axial clearance was reduced,the efficiency of blood pump could be improved by 0.85%,1.71%and 2.90%,respectively.While the upper shaft clearance remained unchanged,the lower shaft clearance was decreased by 1.18%.For hemolysis,the increase of the clearance could reduce the hemolysis index(HI)under the first two clearance conditions,while the axial migration of the blade wheel would increase the HI.When the upper axial clearance was unchanged and the lower axial clearance was 0.3 mm,the HI was the largest,which was 8.65×10^(-4).When the upper and lower axial clearance was 0.7 mm,the HI was the smallest,which was 4.51×10^(-4).Conclusions Improving blood pump clearance is helpful to optimize the performance of blood pump.This study can provide some references for the design and optimization of interstitial structure of blood pump.

关 键 词：血泵 轴向间隙 扬程 效率 溶血 

分 类 号：R318.01[医药卫生—生物医学工程]