Effect of an hourglass-shaped sleeve on the performance of the fluid dynamic bearings of a HDD spindle motor
- Title
- Effect of an hourglass-shaped sleeve on the performance of the fluid dynamic bearings of a HDD spindle motor
- Author
- 장건희
- Keywords
- Critical Mass; Journal Bearing; Friction Torque; Groove Depth; Thrust Bearing
- Issue Date
- 2014-08
- Publisher
- Springer Science + Business Media
- Citation
- MICROSYSTEM TECHNOLOGIES, 2014, 20(8-9), pp. 1435-1445
- Abstract
- This research investigated the characteristics of fluid dynamic bearings (FDBs) in a HDD spindle motor with an hourglass-shaped sleeve. We demonstrated experimentally that the hourglass-shaped sleeve generated through the ball-sizing process is a major source of large repeatable runout and non-repeatable runout in a HDD spindle system. We also numerically proved the effect of hourglass-shaped sleeves on pressure, friction torque, stiffness and damping coefficients, critical mass, and shock response. Finally, we proposed a robust design for FDBs with hourglass-shaped groove depths to compensate for the decrease in the static and dynamic performance of FDBs with hourglass-shaped sleeves. The proposed hourglass-shaped groove depth improves the performance of FDBs with both straight and hourglass-shaped sleeves.
- URI
- http://link.springer.com/article/10.1007/s00542-014-2136-5http://hdl.handle.net/20.500.11754/47655
- ISSN
- 0946-7076
- DOI
- 10.1007/s00542-014-2136-5
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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