公开(公告)号：US07736061B2

公开(公告)日：2010-06-15

申请号：US11629013

申请日：2005-06-02

申请人： Hiromitsu Gotoh ,  Atsushi Ohta

发明人： Hiromitsu Gotoh ,  Atsushi Ohta

IPC分类号： F16C32/06

CPC分类号： G11B19/2018 ,  F16C17/045 ,  F16C17/107 ,  F16C33/745 ,  F16C2370/12 ,  H02K5/1675 ,  H02K7/085

摘要： A fluid dynamic bearing has pressure-generating grooves provided in opposed thrust surfaces of a thrust bearing portion opposite a circular plate and a stopper to direct a working fluid from inner and outer peripheral edges of the thrust bearing portion toward a radially intermediate portion thereof as a shaft member rotates relative to a support. One or more through-holes are provided between inner edges of annular regions of the thrust surfaces in which the pressure-generating grooves are provided and the intermediate portion in the radial direction. The through-holes extend through the thrust bearing portion and interconnect pressure-generating grooves in the opposed thrust surfaces so that bubbles in the working fluid can be sucked smoothly into the through-holes through the pressure-generating grooves.

摘要翻译： 流体动力轴承具有设置在与圆板相对的止推轴承部分的相对推力表面中的压力产生槽和止动件，用于将工作流体从推力轴承部分的内周边缘和外周边缘朝向其径向中间部分引导为 轴构件相对于支撑件旋转。 在其中设置有压力产生槽的推力表面的环形区域的内边缘和径向方向上的中间部分之间设置一个或多个通孔。 通孔延伸穿过止推轴承部分并且在相对的推力表面中互连压力产生槽，使得工作流体中的气泡能够通过压力产生槽平滑地吸入通孔。