Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference (한국윤활학회:학술대회논문집)
- 2002.10b
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- Pages.283-284
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- 2002
A Study on Ferro Fluid Dynamic Bearing Spindel Characteristics by High Frequency Vibration Ssystem
- Miwa, M. (Department of Opto-Mechatronics, Faculty of System Engineering, Wakayama University) ;
- Harita, H. (Department of Opto-Mechatronics, Faculty of System Engineering, Wakayama University) ;
- Nishigami, T. (Department of Opto-Mechatronics, Faculty of System Engineering, Wakayama University) ;
- Kaneko, R. (Department of Opto-Mechatronics, Faculty of System Engineering, Wakayama University) ;
- Unozawa, H. (Ferotec Corporation)
- Published : 2002.10.21
Abstract
Ball bearings (BB) are generally used in spindle of‘ disk drives at present, but they have been known that BB generate high frequency vibration. Fluid dynamic bearings (FDB) having high-rotational accuracy and small vibration characteristics have been developed as next generation spindles. Especially. a ferro fluid bearing (FFB) spindle has the advantage to prevent leakage and dispersion of lubricating oil using a ferro seal. In this study, we measured damping characteristics and frequency characteristics of these bearing spindles using a high-frequency vibration base. High frequency excitation was added to these bearing spindles mounted on the vibration base, and we proved that FFB and FDB spindles have effective damping.