Tribology and Lubricants

  • 제34권1호
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  • Pages.33-41
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  • 2018
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  • 2713-8011(pISSN)
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  • 2713-802X(eISSN)
한국트라이볼로지학회 (Korean Tribology Society)
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자동차 터보차저 베어링 시스템에 적용되는 스퀴즈 필름 댐퍼의 동적계수 측정을 위한 실험장치 개발

Test Rig Development for Identification of Rotordynamic Force Coefficients of Squeeze Film Dampers in Automotive Turbocharger Bearing Systems

  • Hwang, Jisu (Dept. of Interdisciplinary Engineering Systems, Graduate School, Hanyang University) ;
  • Ryu, Keun (Dept. of Mechanical Engineering, Hanyang University) ;
  • Jeung, Sung-Hwa (Compressor Technology and Development, Ingersoll Rand)
  • 투고 : 2017.12.06
  • 심사 : 2018.01.12
  • 발행 : 2018.02.28
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초록

This paper describes a new test rig for identification of rotordynamic force coefficients of squeeze film dampers (SFDs) in automotive turbochargers (TCs). Prior studies have mainly concentrated on relatively large-sized SFDs used in aircraft engines, turbocompressors, and turbopumps. The main objective of the current study is to propose a test rig for identification of dynamic force coefficients of small-sized SFDs (a journal diameter of ~11 mm). The current test rig consists of a journal, a SFD cartridge, four support rods, an upper structure, a data acquisition (DAQ) system, and an oil circulation unit. The annular gaps between the journal outer surface and SFD cartridge inner surface create SFD film lands. The damper has two parallel film lands separated by a central groove, having an axial length and depth of 3 mm. Each film land has a length of 4 mm with a $40{\mu}m$ radial clearance. The static load and dynamic impact tests identify the structural characteristics (i.e., stiffness and natural frequency) of the journal and assembled test rig. The measurements show good agreement with predictions. The SFD performance data from this test rig will be used to develop innovative TC rotor systems with improved NVH and reliability characteristics incorporating advanced SFD technology.

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참고문헌

  1. San Andres, L., Effects of Fluid Inertia Effect on Squeeze Film Damper Force Response, Ph.D. Dissertation, Texas A&M University, College Station, TX, 1985.
  2. Defaye, C., Arghir, M., Bonneau, O., "Experimental study of the radial and tangential forces in a whirling squeeze film damper", STLE Tribology Transactions, Vol. 49, No. 2, pp. 271-278, 2006.
  3. Gehannin, J., Arghir, M., Bonneau, O., "Complete squeeze-film damper analysis based on the "Bulk Flow" Equations", STLE Tribology Transactions, Vol. 53, No. 1, pp. 84-96, 2010.
  4. San Andres, L., Delgado, A., "A novel bulk-flow model for improved predictions of force coefficients in grooved oil seals operating eccentrically", ASME Journal of Engineering for Gas Turbines and Power, Vol. 134, No. 5, 052509, 2012.
  5. Delgado, A., San Andres, L., "Sealed end squeeze film damper: Test rig description and identification of structural parameters", TRC Report No. TRC-SFD-1-04, Texas A&M University, College Station, TX, 2005.
  6. San Andres, L., Delgado, A., "Identification of force coefficients in a squeeze film damper with a mechanical end seal-Part I: unidirectional load Tests", ASME Journal of Engineering for Gas Turbines and Power, Vol. 129, No. 3, pp. 858-864, 2007. https://doi.org/10.1115/1.2436571
  7. San Andres, L., Delgado, A., "Identification of force coefficients in a squeeze film damper with a mechanical end Seal-Centered circular orbit tests", ASME Journal of Tribology, Vol. 129, No. 3, pp. 660-668, 2007. https://doi.org/10.1115/1.2736708
  8. Jeung, S-H., Performance of an Open Ends Squeeze Film Damper Operating with Large Amplitude Orbital Motions: Experimental Analysis and Assessment of the Accuracy of the Linearized Force Coefficients Model, M.S. thesis, Texas A&M University, College Station, TX, 2013.
  9. San Andres, L., Jeung, S. H., Den, S., Savela, G., "Squeeze film damper: An experimental appraisal of their dynamic performance", Proceedings of the Asia Turbomachinery and Pump Symposium (ATPS), Singapore, pp. 1-23, 2016.
  10. Kim, C. H., Lee, Y. B., Lee, N. S., Choi, S. H., Chang, H. W., "Rotordynamic characteristics of a rigid rotor supported by a sealed and pressurized squeeze film damper", J. Korean Soc. Tribol. Lubr. Eng., Vol. 15, No. 4, pp. 304-313, 1999.
  11. Diaz, S., San Andres, L., ''Measurements of pressure in a squeeze film damper with an Air/Oil bubbly mixture", STLE Tribology Transactions, Vol. 41, pp. 282-288, 1998. https://doi.org/10.1080/10402009808983749
  12. Diaz, S., The Effect of Air Entrapment on the Performance of Squeeze Film Dampers: Experiments And Analysis, Ph.D Dissertation, Texas A&M University, College Station, TX, 1999.
  13. Diaz, S., San Andres, L., "Air entrainment versus lubricant vaporization in squeeze film dampers: An Experimental assessment of their fundamental differences", ASME Journal of Engineering for Gas Turbines and Power, Vol. 123, No. 4, pp. 871-877, 2001.
  14. Jung, S-Y., "Analysis of short squeeze film dampers operating with electro-rheological fluids", J. Korean Soc. Tribol. Lubr. Eng., Vol. 11, No. 1, pp. 5-11, 1995.
  15. Hwang, J., Squeeze Film Dampers in Automotive Turbocharger Bearing Systems: Test Rig Development for Identification of Experimental Rotordynamic Force Coefficients, M.S. thesis, Hanyang University, Seoul, Korea, 2018.
  16. Blevins, R. D., Formulas for Dynamics, Acoustics and Vibration, Chap. 4, pp. 134-139, John Wiley & Sons, 2015.