| 摘要 |
The invention relates to a gas bearing of a rapidly rotating shaft, whose end supports a tool, in particular to a gas bearing of a rapidly rotating shaft, whose end supports a polygon mirror ( 27 ) for a spindle of an optical application. To provide radial support along the shaft ( 3 ), gas bearings are arranged in a housing ( 5 ), whereby a first gas bearing ( 9 ) and a third gas bearing ( 8 ) are positioned concentrically in relation to one another and a second gas bearing ( 2 ), which is located midway between the first gas bearing ( 9 ) and the third gas bearing ( 8 ), is mounted in an eccentrically offset manner to the first gas bearing ( 9 ) and the third gas bearing ( 8 ). The invention is also provided with an adjusting device ( 1 ) for increasing the eccentric offset of the second gas bearing ( 2 ) as the rotational speed of the shaft ( 3 ) increases.
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