轴流式血泵磁力驱动系统转矩特性研究  

Torque characteristics of magnetic drive system of axial flow blood pump

作　　者：谭卓[1] 谭建平[1] 刘云龙[1] 谭炜[1] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083

出　　处：《广西大学学报（自然科学版）》2013年第2期308-313,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51075403);教育部博士学科点专项资助基金项目(20100162110004)

摘　　要：为了进一步缩小轴流式血泵体积,为驱动结构优化设计提供指导,研究血泵磁力驱动系统驱动力矩和负载力矩。以实际轴流式血泵为基础,设计了三齿槽和六齿槽两种定子结构;基于ANSYS软件建立了血泵磁力传动系统二维电磁场仿真模型,计算并比较了两种结构的驱动力矩,研究电流对驱动力矩影响规律,建立了血泵负载力矩模型;进行了血泵流体力学特性试验。研究结果表明:在满足人体正常生理要求时,血泵负载力矩值为0.0107 N.m;额定功率下,三齿槽定子结构比六齿槽结构具有更好的驱动能力,驱动电流与驱动力矩成线性正相关关系,电流为0.32 A时,三齿槽定子能够满足血泵9 000 r/min时对驱动力矩要求。该研究为轴流式血泵的磁力驱动结构设计及优化提供了理论依据。To achieve the further minimization of blood pump volume, a study was conducted focu- sing on the driving torque and load torque of the blood pump to provide guide to optimization of its structure. Three-alveolar and six-alveolar stators were designed based on the actual structure of axial flow blood pump. A 2-dimensional electromagnetic simulation model of magnetic drive system was established and simulated by using ANSYS. The driving torque of two drive structures was calculated and compared to study the relationship of current and drive torque and to model the load torque. Correspondingly, a hydromechanics experiment of blood pump was conducted. The results show that the drive torque value which meets the demand of physiological indexes of human body is 0. 010 7 N＇m and three-alveolar structure has a better drive ability than that of six-alveolar stator in rated power. Additionally, the drive capability of stator structure and the current illustrates a positive linear corre- lation. When the current is 0.32 A, three-alveolar stators can meet the requirement of drive torque when the pump rotates at 9 000 r/min. This study provides a theoretical basis for the design and op- timization of magnetic drive structure of blood pump.

关 键 词：轴流式血泵 电磁场 ANSYS 驱动力矩 负载力矩 

分 类 号：TH113[机械工程—机械设计及理论]