• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Artificial Organs >A Novel Design of Spiral Groove Bearing in a Hydrodynamically Levitated Centrifugal Rotary Blood Pump
【24h】

A Novel Design of Spiral Groove Bearing in a Hydrodynamically Levitated Centrifugal Rotary Blood Pump

机译：流体动力悬浮离心式旋转血泵螺旋槽轴承的新型设计

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Good washout is very important in spiral groove bearing (SGB) designs when applied to blood pumps due to the micrometer scales of lubrication films and groove depths. To improve washout, flow rate or leakage through SGBs should be as large as possible. However, this special goal violates conventional SGB designs in which no leakage is desired as the leakage would decrease load-carrying capacity significantly. So, a design concept is formed fulfilling the two goals of high load-carrying capacity and large flow rate: let groove width decrease along flow path and the mating surface of the rotor rotate with a direction facilitating the flow through the grooves. Under this concept, a novel SGB is designed, contrary to conventional ones, with groove width decreasing with increasing spiral radius. This SGB is mounted on the motionless upper plate of our designed centrifugal blood pump, with the mating surface of rotor rotating with a direction facilitating the outward flow. To assess SGB designs, a characteristic plane is originally presented relating to pressure-normalized load-carrying capacity and flow rate. Comparisons between various kinds of SGB designs are made, and computational fluid dynamics (CFD) results are plotted in this characteristic plane from which load/flow performances can be directly read out. CFD and comparison results show that the new designs have superior load/flow characteristics. However, the impact of SGB designs upon hemolysis/thrombus formation is still to be verified according to the concept presented.
机译：由于润滑膜的微米尺度和凹槽深度，在将螺旋凹槽轴承（SGB）设计应用于血泵时，良好的冲洗非常重要。为了改善冲洗效果，通过SGB的流量或泄漏应尽可能大。但是，该特殊目标违反了常规的SGB设计，在传统的SGB设计中，不需要泄漏，因为泄漏会大大降低负载能力。因此，形成了满足高承载能力和大流量的两个目标的设计概念：让凹槽宽度沿流路减小，转子的配合面沿有利于通过凹槽的流动的方向旋转。在这个概念下，设计了一种新颖的SGB，与传统的SGB相反，其槽宽随螺旋半径的增加而减小。该SGB安装在我们设计的离心血泵的静止上板上，转子的配合面沿有利于向外流动的方向旋转。为了评估SGB设计，最初提出了一个与压力归一化的承载能力和流量有关的特征平面。进行了各种SGB设计之间的比较，并在此特征平面上绘制了计算流体动力学（CFD）结果，从中可以直接读取载荷/流动性能。 CFD和比较结果表明，新设计具有出色的负载/流量特性。但是，SGB设计对溶血/血栓形成的影响仍有待根据提出的概念进行验证。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号