Sealing properties of mechanical seals for an axial flow blood pump.
Sealing properties of mechanical seals for an axial flow blood pump.
复制标题
轴流式血泵机械密封的密封性能。
DOI：
10.1046/j.1525-1594.1999.06407.x
复制
发表时间：
1999
影响因子：
2.4
通讯作者：
H. Koyanagi
中科院分区：
文献类型：
--
作者：
J. Tomioka;T. Mori;K. Yamazaki;H. Koyanagi
用于左心室支持的微型心室内轴流式血泵正在开发中。这种泵所需的关键技术之一是电机轴的密封。在这项研究中，为了防止血液回流到电机侧，机械密封的开发和他们的密封性能进行了研究。在实验装置中，机械密封将腔室侧的牛血与电动机侧的冷却水分离。通过电感耦合等离子体（ICP）发光分析来测量血液的泄漏。用氰化高铁血红蛋白法测定溶血率。通过扭矩传感器测量作用在轴上的摩擦扭矩。在实验中，轴的旋转速度从1,000 rpm变化到10,000 rpm，密封面的接触力从1.96 N变化到4.31 N。为了估计润滑状态，绘制了Stribeck曲线，即摩擦系数与轴承特征G数的关系图。实验结果表明，该材料的漏血率和溶血率都很小。摩擦损失也很小。机械密封在从流体润滑状态到混合润滑状态的各种润滑状态下操作。
A miniature intraventricular axial flow blood pump for left ventricular support is under development. One of the key technologies required for such pumps is sealing of the motor shaft. In this study, to prevent blood backflow into the motor side, mechanical seals were developed and their sealing properties investigated. In the experimental apparatus, the mechanical seal separated the bovine blood on the chamber side from the cooling water on the motor side. A leakage of the blood was measured by inductively coupled plasma (ICP) light emission analysis. The rate of hemolysis was measured by the cyanmethemoglobin method. Frictional torque acting on the shaft was measured by a torque transducer. In the experiments, the rotational speed of the shaft was changed from 1,000 to 10,000 rpm, and the contact force of the seal faces was changed from 1.96 to 4.31 N. To estimate lubrication regimes, the Stribeck curve, a diagram of the coefficient of friction against the bearing characteristic G number, was drawn. The results of the experiments showed that both the leakage of blood and the rate of hemolysis were very small. The friction loss was also very small. The mechanical seal was operated in various lubrication regimes, from a fluid lubrication regime to a mixed lubrication regime.