Three-side opened fluid dynamic bearing system for spindle motor in hard disk drive, has supply volume for bearing fluid, connected with bearing gaps, where bearing gaps exhibit opening in which supply volume is arranged

摘要

The system (1) has a fixed bearing component and a rotary movable bearing component forming bearing gaps filled with a bearing fluid, between bearing surfaces lying opposite to each other. The bearing components have openings (2, 4) sealed with respect to an environment by sealings (3, 5) e.g. capillary sealing. Fluid dynamic radial bearings and fluid dynamic axial bearings are arranged along the bearing gaps. A supply volume (7) for the bearing fluid, is connected with the bearing gaps. The bearing gaps exhibit a third opening (6) in which the supply volume is arranged.