INHERENTLY CONTROLLED MAGNETIC BEARING ROTARY BLOOD PUMP

三维磁场支撑血泵转子已成为研制下一代旋转动力泵的一种手段。早期的设计并不完全成功，最有可能是由于缺乏足够的刚度在悬挂。然而，新的设计已经取得了一些显著的成功，并且正在努力减少这些泵的尺寸和功耗。这个第一阶段项目的具体目的是在血泵配置中演示磁轴承概念的可行性，该概念可用于开发更坚固，更高可靠性的旋转血泵系统。该项目将探索基于调谐电感-电容-电阻电磁（LCR-EM）电路实现自调节磁悬浮的有效性。悬浮的控制本质上是固有的电路结构，并通过其安装的泵的几何和动态特性。第一阶段将包括分析、设计、制造和测试一个包含LCR-EM电路的原型血泵。计划的测试活动包括台式测试、各种流体的水下测试、冲击和振动评估以及模拟回路测试。建议的商业应用：在美国，心脏病仍然是导致死亡和残疾的主要原因。在每年死于心脏相关疾病的20万美国人中，约有3万至6万人可能通过心脏移植得以挽救。然而，供体心脏的短缺阻碍了这一点，并刺激了许多机械心脏辅助和替代装置的发展。如果机械辅助泵被证明足够安全可靠，那么它在改善心脏受损患者生活质量方面的潜在应用将大大扩大市场。

Three-dimensional magnetic field support of blood pump rotors has been pursued as a means to produce next-generation rotodynamic pumps. Early designs were not completely successful, most probably due to a lack of sufficient stiffness in the suspension. However, newer designs have achieved some significant successes, and efforts are being undertaken to reduce the size and power consumption of these pumps. The specific aim of this Phase I project is to demonstrate, in a blood pump configuration, the feasibility of a magnetic bearing concept that can be used to develop more robust, higher reliability rotary blood pumping systems. The project will explore the effectiveness of implementing a self-regulating magnetic suspension based on a tuned inductance-capacitance-resistive electromagnetic (LCR-EM) circuit. Control of the levitation is essentially inherent in the construction of the circuit, and by the geometry and dynamic characteristics of the pump in which it is installed. Phase I will involve the analysis, design, fabrication, and test of a prototype blood pump that incorporates the LCR-EM circuit. Planned test activities include bench-top tests, submerged tests in various fluids, shock and vibration assessments, and mock loop tests. PROPOSED COMMERCIAL APPLICATIONS: Heart disease remains the leading cause of death and disability within the United States. Of the 200,000 Americans who die each year due to heart- related problems, about 30,000 to 60,000 could probably be saved with heart transplants. However, the shortage of donor hearts precludes this, and has stimulated the development of many mechanical heart assist and replacement devices. Should mechanical assist pumps prove sufficiently safe and reliable, the potential use to improve the quality of life for cardiac- impaired patients dramatically expands the market.