To provide a rolling mechanism capable of extending the life of a fluid dynamic pressure bearing.
The radial direction of a shaft 101 is supported by a fluid dynamic pressure bearing 129. A fan blade 111 is joined with a rotor 115, and a motor 37 rotates the rotor. When the posture of the rolling mechanism is changed, an acceleration sensor measures the inclination angle of the shaft. A control unit controls the rotational speed of the motor to have a minimum rotational speed when the inclination angle is a predetermined value or lager. As a result, if the shaft inclines from the vertical direction during operation, fluid lubrication is maintained, so that the frequency of metallic contacts between the fluid bearing and the shaft is reduced.
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YAMAZAKI HIROSHI
LEE ZHENG KAI
TSUKAMOTO YASUMICHI
| JP2001140887A | 2001-05-22 | |||
| JP2005198448A | 2005-07-21 | |||
| JP2006202077A | 2006-08-03 | |||
| JP2006006068A | 2006-01-05 | |||
| JP2006002823A | 2006-01-05 | |||
| JPH09182489A | 1997-07-11 | |||
| JP2000270588A | 2000-09-29 | |||
| JP2007141030A | 2007-06-07 |
Hiromichi Watanabe
Kazuo Moriya