[1]杨帆,云忠,胡及雨. 轴流式血泵轴承基于血液损伤的温度场分析[J].中国医学物理学杂志,2019,36(8):968-973.[doi:DOI:10.3969/j.issn.1005-202X.2019.08.020]
　YANG Fan,YUN Zhong,HU Jiyu. Blood damage-based temperature field analysis of axial flow blood pump bearing [J].Chinese Journal of Medical Physics,2019,36(8):968-973.[doi:DOI:10.3969/j.issn.1005-202X.2019.08.020]
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 轴流式血泵轴承基于血液损伤的温度场分析()
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《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
36卷
期数:
2019年第8期
页码:
968-973
栏目:
医学生物物理
出版日期:
2019-08-26

文章信息/Info

Title:
 Blood damage-based temperature field analysis of axial flow blood pump bearing
文章编号:
1005-202X（2019）08-0968-06
作者:
 杨帆; 云忠; 胡及雨
 中南大学机电工程学院， 湖南 长沙 410083
Author(s):
 YANG Fan;  YUN Zhong;  HU Jiyu
 School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
关键词:
 ; 血泵轴承; 血液临界损伤; 红细胞; 温度场分析; 材料
Keywords:
 ; Keywords: blood pump bearing;  critical blood damage;  red blood cell;  temperature field analysis;  material
分类号:
R318
DOI:
DOI:10.3969/j.issn.1005-202X.2019.08.020
文献标志码:
A
摘要:
 为研究血泵轴承在工作过程中的温升对血液的影响，通过在流式细胞仪中对红细胞进行死亡率分析计算和脆性试验，得到红细胞损伤机理，确定血液损伤临界值；对血泵轴承摩擦接触面进行热流密度计算，利用WORKBENCH分别对血泵轴承与导轮整体进行仿真。通过分析血泵轴承的温度场，得到不同摩擦系数及转速下的温升情况。实验结果显示，红细胞的死亡率随着温度的升高而增大，温度达到47 ℃时红细胞死亡数量已超过一半。仿真结果表明，温升情况与材料选择有一定关联，每种材料轴承的温升都是随着转速和摩擦系数的增大而上升，可以通过降低转速，或减小轴与轴套接触面的表面粗糙度的方法来降低温升，使轴承温度始终低于血液损伤临界值。
Abstract:
 Abstract: In order to study the effects of temperature rise of blood pump bearing on the blood during the working process, a red blood cell damage mechanism is obtained by analyzing the mortality rate and testing the brittleness of red blood cells in flow cytometry, thereby determining the critical value of blood damage. The bearing friction contact surface is used to calculate the heat flux density, and WORKBENCH is used to simulate the whole of the blood pump bearing and the guide wheel. By analyzing the temperature field of the blood pump bearing, the temperature rises at different friction coefficients and rotational speeds are obtained. The experimental results show that the mortality rate of red blood cells rises with the increase of temperature, and that the number of red blood cell deaths has exceeded half when the temperature reaches 47 °C. The simulation results reveal that the temperature rise is related to the material selection, and the temperature rise of each material bearing is increased with the increase of rotational speed and friction coefficient. Therefore, the temperature rise can be reduced by reducing rotational speed or reducing the surface roughness of the contact surface between the shaft and the sleeve, so as to ensure the temperature of bearing is always lower than the critical value of blood damage.

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备注/Memo

备注/Memo:
 【收稿日期】2019-02-22
【基金项目】国家自然科学基金（31670999）；浙江省重中之重学科开放基金（GK170201201003/002）；湖南省自然科学基金项目（2019JJ40364）
【作者简介】杨帆，硕士研究生，主要研究方向：生物机械，E-mail: HAVEFUNJUNE@163.com
【通信作者】云忠，教授，博士生导师，主要研究方向：生物机械，E-mail: yunzhong@csu.edu.cn
更新日期/Last Update: 2019-08-27