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TECHNICAL PAPERS

Numerical Analysis of a Coupled Porous Journal and Thrust Bearing System

[+] Author and Article Information
Takuji Kobayashi

R & D Center, NTN Corporation, 3066 Higashikata, Kuwana, Mie 511-8678, Japan

Hiroshi Yabe

Department of Mechanical Engineering, Osaka Electro-Communication University, Neyagawa, Osaka 572-8530, Japan

J. Tribol 127(1), 120-129 (Feb 07, 2005) (10 pages) doi:10.1115/1.1828454 History: Received February 23, 2004; Revised August 09, 2004; Online February 07, 2005
Copyright © 2005 by ASME
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References

Zirkelback,  N., and San Andres,  L., 1998, “Finite Element Analysis of Herringbone Groove Journal Bearings: A Parametric Study,” ASME J. Tribol., 120, pp. 234–240.
Zhu,  J., and Ono,  K., 1999, “A Comparison Study on the Performance of Four Types of Oil Lubricated Hydrodynamic Thrust Bearings for Hard Disk Spindles,” ASME J. Tribol., 121, pp. 114–120.
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.
Jang,  G. H., and Chang,  D. I., 2000, “Analysis of a Hydrodynamic Herringbone Grooved Journal Bearing Considering Cavitation,” ASME J. Tribol., 122, pp. 103–109.
Hirayama, T., and Yabe, H., 2001, “A Study on Operating Characteristics of Spiral Grooved Journal Bearings—An Investigation of the Boundary Contour of Gas–Liquid Interface,” Proc. International Tribology Conference Nagasaki, 2000, K. Ichimaru et al., eds., JST, Tokyo, III, pp. 1633–1638.
Zhang, Q. D., Winoto, S. H., Chen, S. X., and Chong, H. C., 2001, “Design of Fluid Film Bearing for Spindle Motor in Hard Disk Drives,” Proc. International Tribology Conference Nagasaki, 2000, K. Ichimaru et al., eds., JST, Tokyo, III, pp. 1645–1650.
Jang,  G. H., and Yoon,  J. W., 2002, “Nonlinear Dynamic Analysis of a Hydrodynamic Journal Bearing Considering the Effect of a Rotating or Stationary Herringbone Groove,” ASME J. Tribol., 124, pp. 297–304.
Jang,  G. H., and Yoon,  J. W., 2003, “Stability Analysis of a Hydrodynamic Journal Bearing With Rotating Herringbone Grooves,” ASME J. Tribol., 125, pp. 291–300.
Zang, Y., and Hatch, M. R., 1995, “Analysis of Coupled Journal and Thrust Hydrodynamic Bearing Using a Finite-Volume Method,” Advances in Information Storage and Processing Systems, ISPS-Vol. 1, pp. 71–79.
Rahman, M., and Leuthold, H., 2001, “Computer Simulation of a Coupled Journal and Thrust Hydrodynamic Bearing Using a Finite-Element Method,” Proc. International Tribology Conference Nagasaki, 2000, K. Ichimaru et al., eds., JST, Tokyo, III, pp. 1639–1644.
Wang,  Y., Wang,  Q. J., and Lin,  C., 2003, “Mixed Lubrication of Coupled Journal-Thrust-Bearing Systems Including Mass Conserving Cavitation,” ASME J. Tribol., 125, pp. 747–755.
Hori, Y., and Okoshi, K., 1976, “Stability of a Rotating Shaft Supported by Porous Bearings,” Proc. JSLE-ASLE International Lubrication Conference, 1975, T. Sakurai, ed., Elsevier, Amsterdam, pp. 333–340.
Kaneko,  S., Hashimoto,  Y., and I,  H., 1997, “Analysis of Oil–Film Pressure Distribution in Porous Journal Bearings Under Hydrodynamic Lubrication Conditions Using an Improved Boundary Condition,” ASME J. Tribol., 119, pp. 171–178.
Meurisse,  M.-H., and Giudicelli,  B., 1999, “A 3D Conservative Model for Self-Lubricated Porous Journal Bearings in a Hydrodynamic Steady State,” ASME J. Tribol., 121, pp. 529–537.
Vohr,  J. H., and Chow,  C. Y., 1965, “Characteristics of Herringbone-Grooved Gas-Lubricated Journal Bearings,” ASME J. Basic Eng., 87, pp. 568–578.
Hamrock, B. J., 1994, Fundamentals of Fluid Film Lubrication, McGraw-Hill, New York.

Figures

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Outline of the bearing system and coordinate system: (a) outline of the bearing system; (b) coordinate system
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Schematic of the groove structure
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Schematic diagram of herringbone grooves: (a) unwrapped geometry of HGJB; (b) HGTB
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Pressure distribution (ε0=0,J=2.5): (a) overall pressure distribution except the lower HGTB and Chamber 5; (b) pressure distributions of the HGJBs and the corresponding solid HGJBs
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Dimensionless Chamber 3 pressure PCh.3* versus permeability parameter J for downwardly and upwardly tapered-off radial clearance (ε0=0)
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Dimensionless Chamber 3 pressure PCh.3* versus eccentricity ratio ε0 for the porous (J=2.5) and solid sleeves for straight radial clearance
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Dimensionless equilibrium film gap H⁁T of the HGTBs versus permeability parameter J for downwardly and upwardly tapered-off radial clearance (ε0=0)
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Dimensionless equilibrium film gap H⁁T of the HGTBs versus eccentricity ratio ε0 for the porous (J=2.5) and solid sleeves for straight radial clearance
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Dimensionless dynamic coefficients of the HGJBs versus permeability parameter J for downwardly and upwardly tapered-off radial clearance (ε0=0): (a) stiffness coefficients; (b) damping coefficient Cxx
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Dimensionless dynamic coefficients of the HGTBs versus permeability parameter J for downwardly and upwardly tapered-off radial clearance (ε0=0): (a) stiffness coefficient Kzz; (b) damping coefficient Czz
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Dimensionless dynamic coefficients of the HGJBs versus eccentricity ratio ε0 for the porous (J=2.5) and solid sleeves for straight radial clearance: (a) stiffness coefficients; (b) damping coefficients
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Dimensionless dynamic coefficients of the HGTBs versus eccentricity ratio ε0 for the porous (J=2.5) and solid sleeves for straight radial clearance: (a) stiffness coefficient Kzz; (b) damping coefficient Czz
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Dimensionless critical mass M⁁cr versus permeability parameter J for downwardly and upwardly tapered-off clearance conditions (ε0=0)

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