Abstract：To verify the stable suspending of passive magnetic bearing rotor during rotating, a novel self-designed passive magnetic bearing was applied in turbine machine and centrifugal heart pump.The rotating eccentricity and speed of rotors were measured by Hall sensors and speed sensors, respectively. The results show that when the rotating speed is higher than a critical value of 1 800 r·min-1 for turbine machine and 3 250 r·min-1 for heart pump, the rotor eccentricities were obviously smaller than 0.15 mm of the gap between rotors and stators, which indicates that the rotors disaffiliate from stators with stable suspension. High speed rotating levitator with socalled ″Gyro-effect″ can make passive maglev rotator stable. In static state or in the case of rotating speed lower than the critical value, the passive maglev rotator can not keep rotation stable.When the rotating speed is higher than the critical value, the passive magnetic levitator will have Gyro-effect and obtain stable suspension with five degrees of freedom.
2011, Vol. 32 
