| 摘要 |
An improved air fan bearing structure includes a bearing on an air fan and a spindle located in the bearing. The bearing has an inner periphery in contact with the spindle that forms a first air chamber and a second air chamber of different cross section areas. The first air chamber contains a lubricant which has an oil film tension greater than the internal static pressure of the second air chamber. Thus the spindle can be positioned by the internal static pressure and the oil film tension. When the spindle rotates, according to Bernoulli's Law, there is a pressure difference between the first air chamber and the second air chamber to squeeze the lubricant to the second air chamber to form an oil film. Hence the spindle can be supported and rotated without touching the bearing to reduce run out.
|
