Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Rotordynamic Analysis of Automotive Turbochargers Supported on Ball Bearings and Squeeze Film Dampers in Series: Effect of Squeeze Film Damper Design Parameters and Rotor Imbalances

볼 베어링과 스퀴즈 필름 댐퍼로 지지되는 차량용 터보차저의 회전체동역학 해석: 스퀴즈 필름 댐퍼 설계 인자와 회전체 불균형 질량의 영향

  • Kim, Kyuman (Dept. of Mechanical Design Engineering, Graduate School, Hanyang University) ;
  • Ryu, Keun (Dept. of Mechanical Engineering, Hanyang University)
  • 김규만 (한양대학교 대학원 기계설계공학과) ;
  • 류근 (한양대학교 기계공학과)
  • Received : 2017.09.19
  • Accepted : 2017.12.20
  • Published : 2018.02.28
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Abstract

Modern high-performance automotive turbochargers (TCs) implement ceramic hybrid angular contact ball bearings in series with squeeze film dampers (SFDs) to enhance transient responses, thereby reducing the overall emission levels. The current study predicts the rotordynamic responses of the commercial automotive TCs (compressor wheel diameter = ~53 mm, turbine wheel diameter = ~43 mm, and shaft diameter at the bearing locations = ~7 mm) supported on ball bearings and SFDs for various design parameters of SFDs, including radial clearance, axial length, lubricant viscosity, and rotor imbalance conditions (i.e., amplitudes and phase angles) while increasing rotor speed up to 150 krpm. This study validates the predictive rotor finite element model against measurements of mass, polar and transverse moments of inertia, and free-free mode natural frequencies and mode shapes. A nonlinear rotordynamic model integrates nonlinear force coefficients of SFDs to calculate the transient responses of the TC rotor-bearing system. The predicted results show that SFD radial clearances, as well as phase angles of rotor imbalances, have the paramount effect on the dynamic responses of TC shaft motions.

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References

  1. Lee, D., Kim, Y., Kim, B., "Stability analysis of floating ring bearing supported turbocharger", J. Korean Soc. Tribol. Lubr. Eng., Vol. 31, No. 6, pp. 302-307, 2015. https://doi.org/10.9725/kstle.2015.31.6.302
  2. Brouwer, M. D., Sadeghi, F., Lancaster, C., Archer, J., Donaldson, J., "Whirl and friction characteristics of high speed floating ring and ball bearing turbochargers", Journal of Tribology, Vol. 135, No. 4, p. 041120, 2013.
  3. Ertas, B. H., Camatti, M., Mariotti, G., "Synchronous response to rotor imbalance using a damped gas bearing", Journal of Engineering for Gas Turbines and Power, Vol. 132, No. 3, p. 032501, 2010. https://doi.org/10.1115/1.3157097
  4. Vance, J., Zeidan, F., Murphy, B., Machinery Vibration and Rotordynamics, Chap. 4, p.123, John Wiley & Sons, Inc., Hoboken, New Jersey, 2010.
  5. San Andres, L., Barbarie, V., Bhattacharya, A., Gjika, K., "On the effect of thermal energy transport to the Performance of (Semi) floating ring bearing systems for automotive turbochargers," Journal of Engineering for Gas Turbines and Power, Vol. 134, No. 10, p. 102507, 2012. https://doi.org/10.1115/1.4007059
  6. Gjika, K., San Andres, L., Larue, G. D., "Nonlinear dynamic behavior of turbocharger rotor-bearing systems with hydrodynamic oil film and squeeze film damper in series: Prediction and experiment", Journal of Computational and Nonlinear Dynamics, Vol. 5, No. 4, p. 041006, 2010. https://doi.org/10.1115/1.4001817
  7. Brouwer, M. D., Sadeghi, F., "Investigation of turbocharger dynamics using a combined explicit finite and discrete element method rotor-cartridge model," Journal of Tribology, Vol. 139, No. 1, p. 012201, 2016. https://doi.org/10.1115/1.4033101
  8. Ashtekar, A., Sadeghi, F.Z, "Experimental and analytical investigation of high speed turbocharger ball bearings", Journal of Engineering for Gas Turbines and Power, Vol. 133, No. 12, p. 122501, 2011. https://doi.org/10.1115/1.4004004
  9. Hibner, D. H., "Dynamic Response of viscous-damped multi-shaft jet engines," Journal of Aircraft, Vol. 12, No. 4, pp. 305-312, 1975. https://doi.org/10.2514/3.44448
  10. Barrett, L. E., Gunter, E. J., "Steady-state and transient analysis of a squeeze film damper bearing for rotor stability," NASA-CR-2548, 1975.
  11. Chen, W. J., Gunter, E. J., Introduction to Dynamics of Rotor-Bearing Systems, Chap. 7, pp. 328, Trafford Publishing, BC, Canada, 2007.
  12. Vance, J., Zeidan, F., Murphy, B., Machinery Vibration and Rotordynamics, Chap. 3, p.84, John Wiley & Sons, Inc., Hoboken, New Jersey, 2010.

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