To solve the problem of pads floating state prediction of the fluid pivot tilting pad journal bearing
a lubrication analysis model considering the coupling effects of inner hydrodynamic film and outer hydrostatic film was proposed. The lubrication characteristics of traditional fixed pad bearing
mechanical pivot tilting pad bearing and fluid pivot tilting pad bearing under different working conditions were compared. The results show that static characteristics of the fluid pivot tilting pad bearing
such as the film thickness
film pressure and film temperature
are better than that of the traditional fixed pad and tilting pad bearings. Moreover
the direct stiffness and damping are about an order of magnitude higher than the traditional bearings. Therefore
fluid pivot tilting pad bearing can significantly improve the bearing safety and the stability of rotor system. However
pads may suffer two equilibrium states under certain working conditions
which will result in unstable working state and sudden change of bearing performance. This work may provide reference for designing the fluid pivot tilting pad journal bearings.
关键词
Keywords
references
HOLLINGSWORTH L W. Hydrostatically supported tilting-pad journal bearing improvements: US 4059318 [P]. 1977-11-22.
HARANGOZO A V, STOLARSKI T A. Fundamental dynamic performance of fluid-pivot and squeeze-film damper bearings [J]. Tribology International, 1993, 26(6): 413-419.
GERO L R, ETTLES C M. An evaluation of finite difference and finite element methods for the solution of the Reynolds equation [J]. ASLE Transactions, 1986, 29(2): 166-172.
WANG N, CHANG S H, HUANG H C. Stopping criterion initerative solution methods for Reynold equations [J]. Tribology Transactions, 2010, 53(5): 739-747.
MESSMER G A. Hydrostatically supported tilting-pad journal bearing improvements: US 6050727 [P]. 2000-04-18.
DESBORDES H, FILLON M, FRENE J. The effects of three dimensional pad deformations on tilting-pad journal bearings under dynamic loading [J]. ASME Journal of Tribology, 1995, 117(3): 379-384.
SHIN M J, GUILLAUME J H A, CROKE B F W, et al. Addressing ten questions about conceptual rainfall run of models with global sensitivity analyses [J]. Journal of Hydrology, 2013, 503: 135-152.
HEMMATIAN M, OHADI A. Sliding mode control of flexible rotor based on estimated model of magneto-rheological squeeze film damper [J]. Vib Acous, 2013, 135(5): 051023.
NELSON D V, HOLLINGSWORTH L W. The fluid pivot journal bearing [J]. ASME Journal of Tribology, 1977, 99(1): 122-127.
HAUGAARD A M, SANTOS I F. Multi-orifice active tilting pad journal bearings-Harnessing of synergetic coupling effects [J]. Tribology International, 2010, 43(8): 1374-1391.
HAUGAARD A M, SANTOS I F. Stability of multi orifice active tilting-pad journal bearings [J]. Tribology International, 2010, 43(9): 1742-1750.
DECKLER D C, VEILLETTE R J, BRAUN M J, et al. Simulation and control of an active tilting-pad journal bearing [J]. Tribology Transactions, 2004, 47(3): 440-458.
GULDBAKKE J M, HESSELBACH J. Development of bearings and a damper based on magnetically controllable fluids [J]. Journal of Physics Condensed Matter, 2006, 18(38): S2959.
HOU Y, LAI T W, CHEN S T, et al. Numerical analysis on the static performance of tilting-pad journal gas bearing in subsystems [J]. Tribology International, 2013, 61(1): 70-79.
MIKULA A M. Further test results of the leading edge groove(LEG)tilting-pad thrust bearing [J]. ASME Journal of Tribology, 1988, 110(1): 174-179.
DMOCHOWSKI W, BROCKWELL K, DECAMILLO S, et al. A study of the thermal characteristics of the leading edge groove and conventional tilting-pad journal bearing [J]. ASME Journal of Tribology, 1993, 115(2): 219-226.
RIMPEL A, KIM D. Experimental and analytical studies on flexure pivot tilting-pad gas bearings with dampers applied to radially compliant pads [J]. ASME Journal of Tribology, 2009, 131(4): 041001.
LI Weiguang, YANG Qijiang, MENG Qiyong. Experimental research on the dynamic characteristics of leading edge grooved tilting-pad bearing [J]. Journal of South China University of Technology(Natural Science Edition), 2015, 43(3): 21-28.
YANG Qijiang, LI Weiguang, et al. A study of the dynamic performance for tilting-pad bearing considering thermohydrodynamic and perturbation frequency effects [J]. Journal of the Balkan Tribological Association, 2016, 22(2): 766-781.
CHAUHAN A, SEHGAL R, SHARMA R K. Thermohydronamics analysis of elliptical journal bearing with different grade oils [J]. Tribology International, 2010, 43: 1970-1977.
LOU Mingyang, BAREILLE O. Experimental and numerical investigation on the performance of fluid pivot journal bearing in one-sided floating state [J]. Tribology International, 2019, 138: 353-364.
BOOSER E R. CRC handbook of lubrication(theory and practice of tribology): volume II theory and design [M]. Boca Raton, FL, USA: CRC Press Inc., 1984: 264-266.
NICHOLAS J, WHALEN J, FRANKLIN S. Improving critical speed calculations using flexible bearing support FRF compliance data [C]∥ Proceedings of the 15th Turbomachinery and Pump Symposia. Turbomachinery Laboratory, Texas AM University, TX, USA: TPS, 1986: 69-78.
HE M. Thermoelastohydrodynamic analysis of fluid film journal bearings [D]. Charlottesville, VA, USA: University of Virginia, 2003: 23-26.