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TECHNICAL PAPERS

Analysis of a Hydrodynamic Bearing of a HDD Spindle Motor at Elevated Temperature

[+] Author and Article Information
G. H. Jang, K. S. Kim

PREMDepartment of Mechanical Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul, 133-791, Republic of Korea

H. S. Lee, C. S. Kim

Storage Lab., Samsung Advanced Institute of Technology, Suwon, 440-600, Republic of Korea

J. Tribol 126(2), 353-359 (Apr 19, 2004) (7 pages) doi:10.1115/1.1611500 History: Received February 11, 2003; Revised July 11, 2003; Online April 19, 2004
Copyright © 2004 by ASME
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References

Bouchard,  G., Lau,  L., and Talke,  F. E., 1987, “An Investigation of Nonrepeatable Spindle Runout,” IEEE Trans. Magn., 23, pp. 3687–3689.
McCallion,  H., Yousif,  F., and Lloyd,  T., 1970, “The Analysis of Thermal Effects in a Full Journal Bearing,” Transactions of the ASME, 92, pp. 578–587.
Kita, H., Uero, Y., Obata, S., and Matsuoka, K., 2000, “Numerical Analysis of Temperature of Lubrication Oil in HDB Spindle Motor,” Proc. JSME Annu. Meeting, pp. 193–194.
Matsuoka,  K., Obata,  S., Kita,  H., and Toujou,  F., 2001, “Development of FDB Spindle Motors for HDD Use,” IEEE Trans. Magn., 37(2), pp. 783–788.
Incropera, F., and DeWitt, D., 1990, Introduction to Heat Transfer, John Wiley & Sons, Inc.
Jang,  G. H., and Yoon,  J. W., 2002, “Nonlinear Dynamic Analysis of a Hydrodynamic Journal Bearing Due to the Effect of a Rotating or Stationary Herringbone Groove,” ASME J. Tribol., 124, pp. 297–304.
Rizzoni, G., 1993, Principles and Applications of Electrical Engineering, Richard D. Irwin, Inc.
Jang,  G. H., and Kim,  Y. J., 1999, “Calculation of Dynamic Coefficients in a Hydrodynamic Bearing Considering Five Degrees of Freedom for a General Rotor-Bearing System,” ASME J. Tribol., 121, pp. 499–505.

Figures

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Rotating-shaft type of a HDB spindle motor
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Temperature variation on the top-cover and base of a HDD inside a computer
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Iterative method to determine the temperature and clearance of a bearing
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Groove geometry and parameters
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Axisymmetric finite element model of the HDB spindle motor for the analysis of heat conduction
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Temperature measurement around the periphery of the HDB spindle motor
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Finite element model of the HDB spindle motor for the analysis of thermal deformation
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HDB spindle motor with a thermocouple sensor
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Temperature distribution of the HDB spindle motor: (a) surrounding temperature of 28.7°C; and (b) surrounding temperature of 58.7°C.
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Variation of the load capacity of the upper journal bearing
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Variation of the stiffness coefficients of the upper journal bearing: (a) Kxx and (b) Kxy
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Variation of the damping coefficients of the upper journal bearing: (a) Cxx and (b) Cxy
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Variation of the load capacity of the upper thrust bearing
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Variation of the stiffness coefficients of the upper thrust bearing
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Variation of the damping coefficients of the upper thrust bearing

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