| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealing structure of a magnetic fluid bearing with magnets for magnetic fluid sealing difficult to separate, and capable of providing the sufficient magnetic force for magnetic fluid holding. SOLUTION: In this sealing structure of a magnetic fluid bearing holding the magnetic fluid 108 for generating the dynamic pressure in a sealing zone formed between an outer surface of a thrust ring 30 at a thrust side and an inner surface of a hub 12 at a rotor side of the relatively rotated stator and the rotor, and including a dynamic pressure generating surface formed on a surface opposite to an outer surface of the stator and an inner surface of the rotor, a pair of sealing magnets 32a, 32b are mounted at an opening W side of the sealing zone while fully holding the opening W therebetween in a state that magnetic poles of the same polarity are opposite to each other.
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