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    • 4. 发明授权
    • Air purging for a fluid dynamic bearing
    • 空气吹扫用于流体动力轴承
    • US08308365B2
    • 2012-11-13
    • US12787325
    • 2010-05-25
    • Anthony J. AielloChristopher M. WoldemarNorbert S. ParsoneaultAlan L. Grantz
    • Anthony J. AielloChristopher M. WoldemarNorbert S. ParsoneaultAlan L. Grantz
    • F16C32/06G11B17/02G11B17/04
    • F16C33/103F16C17/107F16C33/107F16C33/745F16C2370/12Y10T29/49639Y10T29/49826
    • A robust spindle motor is provided having improved shock resistance for fluid containment, as well as enhanced air purging characteristics. In an aspect, axial displacement of relatively rotating components is restricted by utilizing a limiter situated adjacent to a limiter bushing forming an axial limiter gap therebetween. A fluid channel, at least partially diverging, extends from a hydrodynamic bearing to the axial limiter gap, and continues to a region beyond the axial limiter gap. In an aspect, an axially diverging slot is situated adjacent to the axial limiter gap. Power is reduced by reducing viscous drag between relatively rotating components, hydrodynamic bearing length is increased, and higher stiffness of the hydrodynamic bearing is provided. Fluid volume may be increased, thereby offsetting fluid evaporation losses and allowing for the use of lower viscosity lubricants.
    • 提供了一种坚固的主轴电动机,其具有改进的防止流体容纳的抗冲击性,以及增强的空气净化特性。 在一个方面,相对旋转部件的轴向位移通过利用与限制器衬套相邻的限制器来限制,该限制器在其间形成轴向限制器间隙。 至少部分发散的流体通道从流体动力轴承延伸到轴向限制器间隙,并且继续到超出轴向限制器间隙的区域。 在一个方面,轴向发散的狭槽位于轴向限制器间隙附近。 通过减少相对旋转部件之间的粘滞阻力来降低动力,提高流体动力轴承长度,提供更高刚度的流体动力轴承。 流体体积可能增加,从而抵消流体蒸发损失并允许使用较低粘度的润滑剂。