Fluid dynamic bearing system for spindle motor that is utilized for driving magnetic storage disk of hard disk drive, has axial section formed by regions of bearing component and rotor component

摘要

The system has an axial bearing (26) formed between radial running bearing surfaces of a rotor component (14) and a bearing component (16) that is connected with a base plate (10). A recirculation channel (28) is filled with bearing fluid e.g. bearing oil, and connects remote areas of a bearing with each other. Sealing gaps (32, 34) are provided for sealing bearing gap toward outside, and a barrier gap (35) is provided adjacent to the sealing gap and comprises an axial running section. The axial section is formed by regions of the bearing component and the rotor component. An independent claim is also included for a hard disk drive comprising a spindle motor.