摘要
提出了一种利用磁场力辅助流体动压轴承工作的磁动压混合推力轴承。这种轴承在机器起动和停车阶段,依靠磁场力支承转子系统,当机器达到一定转速后,主要由动压油膜承受轴上载荷,从而克服了流体动压轴承在此阶段出现混合摩擦的问题。研究了这种混合推力轴承承载能力的数学模型,计算了磁轴承的承载能力。设计制造了试验装置并对这种轴承在不同气隙和转速下的性能进行了试验测试。结果表明这种磁动压混合的工作原理是可行的,可以改善流体动压轴承的工作性能。
A thrust bearing of magnetic-hydrodynamic hybrid was developed which used magnetic field force to assist hydrodynamic bearing. The rotor system was levitated by the magaetic field force in order to overcome the hybrid friction in hydrodynamic bearing during the start and stopt. When the rotor reaced to a certain rotational speed,the beaing supported the axial force by hydrodynamic film. A model of the bearing force was studied and the carrying capacity of magnetic bearing was predicted.An experimental rig of the thrust bearing was developed and the properties of the bearing were tested under different rotational speed and airgap.The results showed that the working principle of the bearing was practicable and the properties of the hydrodynamic bearing could be improved.
出处
《机械设计与研究》
CSCD
2004年第5期49-51,共3页
Machine Design And Research
基金
国家自然科学基金资助项目(59975042)
关键词
永磁推力轴承
承载能力
流体动压润滑
thrust magnetic bearing
carrying capacity
hydrodynamic lubrication
