枢轴距离对机械瓣膜性能的影响分析  

Influence of Pivot Distance on the Performance of a Mechanic Heart Valve

作　　者：张勇[1] 武亮亮[1] 黄楠[1] 

机构地区：[1]西南交通大学材料科学与工程学院,成都610031

出　　处：《生物医学工程学杂志》2014年第5期1037-1040,共4页Journal of Biomedical Engineering

基　　金：国家863重大科研资助项目(2006AA02A139)

摘　　要：通过分析枢轴距离对机械瓣膜(MHV)的启闭运动、瓣膜装配及流场特性的影响关系,建立起枢轴距离的取值约束条件,采用有限元手段进行了模拟验证并明确了枢轴距离的合理值。结果表明,对于不同规格的瓣膜,随着枢轴距离与瓣膜内孔直径比值的增大,瓣膜中心流特性增强,但瓣膜装配时易塑性变形。瓣膜性能实验结果证实,不同规格瓣膜可按照相同的枢轴距离与瓣膜内孔直径的比值设计。Based on the analysis of the influence of the valve pivot distance on the performance of mechanical heart valve （MHV）, such as the valve opening and closing features, flow field characteristics and the valve assembly prop- erties, value constraints of the valve pivot distance were established, and the reasonable valve was obtained by means of the finite element method. It can be shown that the central flow characteristics of the valve could be enhanced with the increasing of the ratio of pivot distance to valve inner diameter, but the plastic deformation of the ring could be li- able to occur in the MHV assembly process. It is proved that the valve of specifications can be designed in similar ra- tio of pivot distance to valve inner diameter according to the result of the valve performance experiment.

关 键 词：机械瓣膜 枢轴距离 结构设计 

分 类 号：R654.2[医药卫生—外科学]