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http://dx.doi.org/10.5050/KSNVN.2005.15.1.087

Finite Element Analysis of a Coupled Hydrodynamic Journal and Thrust Bearing in a Computer Hard Disk Drive  

Kim, Hakwoon (한양대학교 대학원 정밀기계공학과)
Lee, Sanghoon (한양대학교 대학원 정밀기계공학과)
Jang, Gunhee (한양대학교 기계공학부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.15, no.1, 2005 , pp. 87-95 More about this Journal
Abstract
This paper proposes a method to calculate the characteristics of a coupled hydrodynamic journal and thrust bearing of a HDD spindle motor. The governing equations for the journal and thrust bearings are the two dimensional Reynolds equations in $\theta z$ and $ r\theta$ planes, respectively. Finite element method is appropriately applied to analyze the coupled journal and thrust bearing by satisfying the continuity of mass and pressure at the interface between the journal and thrust bearings. The pressure in a coupled bearing is calculated by applying the Reynolds boundary condition and compared with that by using the Half-Sommerfeld boundary condition. The static characteristics are obtained by integrating the pressure along the fluid film. The flying height of spindle motor is measured to verify the proposed analytical result. This research shows that the proposed method can describe HDB in a HDD system more accurately and realistically than the separate analysis of a journal or thrust bearing.
Keywords
Hydrodynamic Bearing; Finite Element Method; Coupled Analysis; Hard Disk Drive; Reynolds Boundary Condition; Reynolds Equation;
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1 Zhang. Q.D., Chen, S.X., Liu, Z,J., 1999, 'Design of a hybrid fluid bearing system for HDD spindles.' IEEE transactions on magnetics. Vol. 35. No. 2, pp. 821-826   DOI   ScienceOn
2 Zang, Y., Hatch, M. R., 1995. 'Analysis of Coupled Journal and Thrust Hydrodynamic Bearing using Finite Volume Method.' ASME AISPS. Vol. 1. pp. 71-79
3 Jang. G. H. Chang. D. I., 2000, 'Analysis of Hydrodynamic Herringbone Grooved journal Bearing Considering Cavitation.' ASME Journal of Tribology, Vol. 122. No. 1, pp. 103-109   DOI   ScienceOn
4 Rahman, M., Leuthold. J., 1996. 'Computer Simulation of a Coupled Journal and Thrust Hydrodynamic Bearing using a Finite-Element Method,' Proceedings of the 25th Annual IMCSD symposium. San Jose. CA, June. pp. 103-112
5 Zheng, T., Hasebe, N., 2000. 'Calculation of Equilibrium Position and Dynamic Coefficients of a Journal Bearing Using Free Boundary Theory.' Transactions of the ASME. Vol. 122. No. 3. pp 616-621   DOI   ScienceOn
6 Hamrock. Bernard J., Fundamentals of Fluid Film Lubrication, McGraw-Hill. 1994
7 Zirkelback, N., San Andres, L., 1998, 'Finite Element Analysis of Herringbone Groove Journal Bearings: A Parametric Study,' ASME Journal of Tribology, Vol. 120, pp. 234-240   DOI   ScienceOn