【摘要】 南极超低温的环境使得接触式机械轴承的性能受到严重影响,而具有低功耗、无机械接触摩擦等优点的磁悬浮轴承非常适合这种环境。选取32块扇形永磁体拼接成定子永磁圈,将转子永磁体分别设计为圆形、六边形、扇形及四边形结构,通过仿真分别得出永磁支承的悬浮力及波动率。最后,对扇形转子和四边形转子两种结构进行实验测量。实验结果表明:相对于扇形转子,四边形转子结构的承载能力相近,但稳定性显著提高。更多还原

【Abstract】 The ultra-low temperature environment at the South Pole seriously affects the properties of contact mechanical bearing. The magnetic bearing which has the advantages of low power consumption and no mechanical contact friction is suitable for working in this environment. Permanent magnet stator composes of 32 pieces of sectorial permanent magnets splicing together. The permanent magnet rotor is respectively made into different shapes,including circle,hexagon,sector and quadrilateral. Suspension force and variation are obtained through simulating calculation.Finally,the two structures of sector rotor and quadrilateral rotor are selected to experiment respectively. Experimental results indicate that the bearing capacities of sector rotor and quadrilateral rotor are consistent; but the quadrilateral structure shows high improved stability.更多还原