【摘要】 为使人工心脏泵可以永久使用,作者研制出一种仅采用永磁轴承实现磁悬浮的离心泵。其保留了电磁悬浮泵的优点,又避免其不足之处。然而,传统理论认为永磁悬浮是不可能稳定平衡的。作者利用陀螺效应解决了此问题。径向驱动的离心泵包括一个转子和一个定子。转子由驱动磁钢和叶轮组成;定子由电机线圈和泵壳构成。两个永磁轴承抵消电机线圈铁心与转子驱动磁钢之间的吸引力。生理盐水试验表明,当血泵转速超过3250转/分、流量大于1升/分时,转子可以在定子中悬浮起来。高转速是达到陀螺效应的条件,大流量是良好水动力性能的前提。更多还原

【Abstract】 The authors have studled on the permanent maglev centrifugal pump just using passive magnetic bearings for working permanently. A radially driven centrifugal pump was constructed, which had a rotor and a stator. The rotor consisted of driven magnets and an impeller ; the stator had a motor coil and a pump housing. Two passive magnetic bearings were devised to resist the attractive force between the motor coil iron core and rotor driven magnets.Bench testing with saline demonstraed that the rotor can be suspended in the stator if the rotating speed of the pump was larger than 3,250rpm and the flow rate was larger than 1 lit/min. High speed is a precondition to realize a so-called gyro-effect which stabilizes the passive maglev rotor and high flow rate is an indication of a good hydraulic property of the pump.更多还原