| 摘要 |
The present invention discloses a dynamic pressure bearing device, comprising a bearing, an axial hole passing through the bearing, a plurality of dynamic pressure generating grooves extended along the axial direction and disposed on the periphery of the axial hole. The dynamic pressure generating groove comprises a fluid lubricating medium therein, and these dynamic pressure generating grooves comprise a base section extended along the axial direction, and a lateral section is expanded and extended from both ends of the base section, and these lateral sections are curved in shape, such that when the axle center rotates in the bearing, the fluid lubricating medium originally disposed at the lateral section will flow towards the base section and concentrate at the base section to have a slightly protruded shape as to press against the axle center for rotating the axle center stably. Since the lateral section is curved in shape, therefore the lubricating medium therein will flow into the base section completely without staying on the lateral section. Therefore, the air in the bearing will pass through the bearing successfully without staying on the bearing or producing noised.
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