Analysis on the Performances of Misaligned Journal Bearings using Full-Scale Test Rig and Conjugate Heat Transfer Method

Document Type : Regular Article

Authors

College of New Energy, China University of Petroleum (East China), Qingdao, 266580, China

10.47176/jafm.15.03.33138

Abstract

Misalignment effects increase the risk of scratch or seizure failure for the journal bearings-rotor system. To investigate the performances of misaligned journal bearings, a full-scale journal bearings-rotor system test rig is designed and journal orbits are tested under different speeds. Then, a THD lubrication model is established to simulate lubrication performances under different misalignment conditions. The results show that for a misaligned journal bearings-rotor system, the center of the orbits of the bearing closing to coupling is fixed around the coupling. The orbits center of the bearing far away coupling is floating gradually with an increasing speed. The vibration amplitude of bearing closing to coupling is larger than that of bearing far away from the coupling. When the minimum oil film thickness is decreasing, the maximum film temperature is increasing except for the bearing closing to coupling. For different misalignment directions, maximum film temperature is determined by the position of the high pressure zone and high temperature zone.

Keywords


Alves, D. S., M. F. Wu and K. L. Cavalca (2019). Application of gain-scheduled vibration control to nonlinear journal-bearing supported rotor. Journal of Sound and Vibration 442, 714-737.##
Armentrout, R. W., M. He, T. Haykin and A. E. Reed (2017). Analysis of turbulence and convective inertia in a water-lubricated tilting-pad journal bearing using conventional and CFD approaches. Tribology Transactions 60(6), 1129-1147.##
Beamish, S., X. Li, H. Brunskill, A. Hunter and R. Dwyer-Joyce (2020). Circumferential film thickness measurement in journal bearings via the ultrasonic technique. Tribology International 148, 10629.##
Dhande, D. Y. and D. W. Pande (2016). Numerical analysis of multiphase flow in hydrodynamic journal bearing using CFD coupled Fluid Structure interaction with cavitation. International Conference on Automatic Control and Dynamic Optimization Techniques 964-971.##
Fouflias, D. G., A. G. Charitopoulos, C. I. Papadopoulos, L. Kaiktsis and M. Fillon (2015). Performance comparison between textured, pocket, and tapered-land sector-pad thrust bearings using computational fluid dynamics thermohydrodynamic analysis. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 229(4),376-397.##
Nassab, G. S. A. (2005). Inertia effect on the thermohydrodynamic characteristics of journal bearings. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 219(6), 459-467.##
Hu, W., H. Miah, N. S. Feng and E. J. Hahn (2000). A rig for testing lateral misalignment effects in a flexible rotor supported on three or more hydrodynamic journal bearings. Tribology International 33(3), 197-204.##
Khonsari, M. M. and E. R. Booser (2008). Applied Tribology: Bearing Design and Lubrication: Second Edition. John Wiley and Sons 1-566.##
Li, H., H. Liu, S. Qi and Y. Liu (2020), A high-speed rolling bearing test rig supported by sliding bearing. Industrial Lubrication and Tribology 72(7), 955-959.##
Li, M. X., S. Zheng, G. Ying and Q. Li (2017a). Development and validation of the 3D temperature field simulation for the tilting pad journal bearings. Computational Thermal Sciences 9(2), 151-163.##
Li, Q., S. Zhang, L. Ma, W. W. Xu and S. Y. Zheng (2017b). Stiffness and damping coefficients for journal bearing using the 3D transient flow calculation. Journal of Mechanical Science and Technology 31(5), 2083-2091.##
Li, Q., S. Zhang, Y. J. Wang, W. W. Xu and Z. B. Wang (2018). Investigations of the three-dimensional temperature field of journal bearing considering conjugate heat transfer and cavitation. Industrial Lubrication and Tribology 71(1), 109-118.##
Mo, J. T., C. Gu, X. Pan, S. Zhen and G. Ying (2018). A Thermohydrodynamic Analysis of the Self-Lubricating Bearings Applied in Gear Pumps Using Computational Fluid Dynamics Method. Journal of Tribology 140(1), 011102.##
Papadopoulos, C. I., L. Kaiktsis and M. Fillon (2014). Computational fluid dynamics thermohydrodynamic analysis of three-dimensional sector-pad thrust bearings with rectangular dimples. Journal of Tribology 136(1), 011702.##
Pierre, I., J. Bouyer and M. Fillon, (2004). Thermohydrodynamic behavior of misaligned plain journal bearings: theoretical and experimental approaches. Tribology Transactions 147(4) 594-604.##
Prabhu, B. S. (1997). An experimental investigation on the misalignment effects in journal bearings. Tribology Transactions 40(2), 235-242.##
Samyn, P., P. De Baets, G. Schoukens and A. P. Van Peteghem (2006). Large-scale tests on friction and wear of engineering polymers for material selection in highly loaded sliding systems. Materials and Design 27(7) 535-555.##
Silieti, M., A. J. Kassab and E. Divo (2009). Film cooling effectiveness: Comparison of adiabatic and conjugate heat transfer CFD models. International Journal of Thermal Sciences 148,2237-2248.##
Singhal, A. K., M. M. Athavale, H. Y. Li and Y. Jiang (2002) Mathematical basis and validation of the full cavitation model. Journal of Fluids Engineering-Transactions of the ASME 124(3), 617-624.##
Song, Y. and C. Gu (2015). Development and validation of a three-dimensional computational fluid dynamics analysis for journal bearings considering cavitation and conjugate heat transfer. Journal of Engineering for Gas Turbines and Power 137(12), 122502.##
Sun, F. X., X. Zhang, X. Wang, Z. Su and D. Wang (2019). Effects of shaft shape errors on the dynamic characteristics of a rotor-bearing system. Journal of Tribology-Transactions of the ASME 141(10), 101701.##
Sun, J., M. Deng, Y. Fu and C. Gui (2010). Thermohydrodynamic lubrication analysis of misaligned plain journal bearing with rough surface. Journal of Tribology 132(1), 1-8.##
Sun, J., X. Zhu, L. Zhang, X. Wang, C. Wang, H. Wang and X. Zhao (2014). Effect of surface roughness, viscosity-pressure relationship and elastic deformation on lubrication performance of misaligned journal bearings. Industrial Lubrication and Tribology 66(3), 337-345.##
Thomsen, K. and P. Klit (2012). Improvement of journal bearing operation at heavy misalignment using bearing flexibility and compliant liners. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 226(8), 651-660.##
Vakilian, M., S. A. G. Nassab and Z. Kheirandish (2013). Study of inertia effect on thermohydrodynamic characteristics of Rayleigh step bearings by CFD method. Mechanics and Industry 14(4), 275-285.##
Zhang, X. L., Z. Yin, D. Jing, G. Gao, Y. Wang and X. Wang (2016). Load carrying capacity of misaligned hydrodynamic water-lubricated plain journal bearings with rigid bush materials. Tribology International 99, 1-13.##
Zhang, Y., G. Chen and L. Wang (2019). Thermoelastohydrodynamic analysis of misaligned bearings with texture on journal surface under high-speed and heavy-load conditions. Chinese Journal of Aeronautics 32(5), 1331-1342.##
Zhang, Z. S., X. Dai and Y. Xie (2013). Thermoelastohydrodynamic behavior of misaligned plain journal bearings. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227(11), 2582-2599.##
Volume 15, Issue 3 - Serial Number 64
May and June 2022
Pages 747-756
  • Received: 26 June 2021
  • Revised: 26 November 2021
  • Accepted: 27 December 2021
  • First Publish Date: 14 March 2022