Chen H M, Smith W A, Walton J F
Mohawk Innovative Technology, Inc., Albany, New York, USA.
ASAIO J. 1998 Sep-Oct;44(5):M728-32. doi: 10.1097/00002480-199809000-00087.
Mohawk Innovative Technology, Inc. (MiTi; Albany, NY) and the Cleveland Clinic Foundation (Cleveland, OH) have been engaged in a joint project to develop a new, high efficiency magnetic bearing for use in a rotary blood pump. Such a bearing would have some advantages with respect to permitting large, low shear clearances and avoiding crevice-like pivot interfaces and surface wear related issues. While magnetically suspended blood pumps have been demonstrated, other prototypes reported in the literature consume 5-15 W of power to energize the bearing. The MiTi bearing has been prototyped and tested. The design is a hybrid configuration, radially passive and axially active. The rotor-and-bearing system has been run in air and in blood analog solution, in all orientations. Measurements show a bearing power consumption below 0.5 W. Vibration peaked at 0.2 g in blood analog solution; frequency analysis indicated that this was primarily related to motor design features. Measured displacements from the equilibrium position were less than 0.005 cm. Based on this highly successful bearing prototype, an integrated pump/bearing system is now being developed.
莫霍克创新技术公司（MiTi；纽约州奥尔巴尼）和克利夫兰诊所基金会（俄亥俄州克利夫兰）一直在参与一个联合项目，旨在开发一种用于旋转血泵的新型高效磁轴承。这种轴承在允许较大的低剪切间隙以及避免类似缝隙的枢轴界面和表面磨损相关问题方面具有一些优势。虽然磁悬浮血泵已得到验证，但文献中报道的其他原型在为轴承供电时消耗5 - 15瓦的功率。MiTi轴承已制作出原型并进行了测试。其设计为混合配置，径向被动、轴向主动。转子和轴承系统已在空气中以及血液模拟溶液中在所有方向上运行。测量结果显示轴承功耗低于0.5瓦。在血液模拟溶液中振动峰值为0.2克；频率分析表明这主要与电机设计特点有关。从平衡位置测得的位移小于0.005厘米。基于这个非常成功的轴承原型，目前正在开发一种集成泵/轴承系统。
