Abstract：A unitized dynamic model for a journal floating ring hybrid bearing-rotor system was established considering floating ring mass and rotor stiffness.The stability criterion for the journal floating ring hybrid bearing-rotor system was derived using Routh-Hurwitz method.The dynamic characteristic coefficients of inner and outer films for a high speed floating ring bearing were calculated with the finite difference method under different operation conditions.Further more the variation of the threshold rotating speed of the bearing-rotor system with floating ring mass and rotor stiffness was acquired.The results showed that the threshold rotating speed of the bearing-rotor system decreases slightly with increase in floating ring mass under different eccentricities; at the same time, the threshold rotating speed of the bearing-rotor system increases quickly with increase in rotor stiffness.The results provided a reference for the overall modeling and stability analysis of floating ring hybrid bearing-elastic rotor systems.
[1] 马辉, 李辉, 牛和强, 等. 滑动轴承-转子系统油膜失稳参数影响分析[J]. 振动与冲击, 2013, 32(23): 100~104.
MA Hui, LI Hui, NIU He-qiang, et al. Parametric influence analysis of oil-film instability in a sliding bearing-rotor system[J]. Journal of Vibration and Shock, 2013, 32(23): 100~104.
[2] Guo Hong, Lai Xinmin, Cen Shaoqi. Theoretical and Experimental Study on Dynamic Coefficients and Stability for a Hydrostatic/Hydrodynamic Conical Bearing[J], ASME, Journal of Tribology, 2009, 131(4): 041701~041707.
[3] Mattew D. Brouwer, Farshid Sadeghi, Craig Lancaster, et al. Whirl and Friction Characteristics of High Speed Floating Ring and Ball Bearing Turbochargers[J]. Journal of Tribology, 2013, 135(10): 041102-1~041102-9
[4] Hai-lun Zhou, Guo-quan Feng, Gui-huo Luo, et al. The dynamic characteristics of a rotor supported on ball bearings with different floating ring squeeze film dampers[J]. Mechanism and Machine Theory, 2014, 80: 200~213
[5] 沈那伟, 焦映厚, 陈照波, 等. 微型燃气轮机浮环轴承动力学参数影响因素研究[J]. 振动工程学报, 2012, 25(6): 714~723.
SHEN Na-wei, JIAO Ying-hou, CHEN Zhao-bo, et al. Study of impact factor on dynamic parameters of the floating ring bearing for micro gas turbogenerator[J]. Journal of Vibration Engineering, 2012, 25(6): 714~723.
[6] Cheng-Chi Wang, Her-Terng Yau, and Chi-Chang Wang. Chaotic and Subharmonic Motion Analysis of Floating Ring Gas Bearing System by Hybrid Numerical Method[J]. Mathematical Problems in Engineering, 2013, 1~14.
[7] WANG Longkai, BIN Guangfu, LI Xuejun, and ZHANG Xuefeng. Effects of Floating Ring Bearing Manufacturing Tolerance Clearance on the Dynamic Characteristics for Turbocharger[J]. CHINESE JOURNAL OF MECHANICAL ENGINEERING, 2015, 28(3): 530~540.
[8] Panagiotis Koutsovasilis, Nicolas Driot, Daxining Lu, et al. Quantification of sub-synchronous vibrations for turbocharger rotors with full-floating ring bearings[J]. ARCHIVE OF APPLIED MECHANICS, 2015, 85(4): 481~502.
[9] San Andres Luis, Barbarie Vince, Bhattacharya Avijit, et al. On the effect of thermal energy transport to the performance of (semi) floating ring bearing systems for automotive turbochargers[J]. Journal of Engineering for Gas Turbines and Power, 2012, 134: 102507-1~102507-10
[10] 郭红, 张直明, 岑少起, 等. 径向浮环动静压轴承稳定性研究[J]. 振动与冲击, 2012, 31(17): 17~21.
Guo Hong, Zhang Zhi-ming, Cen Shao-qi et al. Stability of Journal Floating Ring Hybrid Bearing[J]. Journal of Vibration and Shock, 2012, 31(17): 17~21.
[11] 孙一休, 郭红, 张绍林, 等. 计入浮环质量的浮环动静压轴承稳定性分析[J]. 润滑与密封, 2015, 40(5): 47~51, 63
SUN Yi-xiu, GUO Hong, ZHANG Shao-lin, et al. Stability Analysis of Floating Ring Hybrid Bearing Considering Floating Ring Mass[J]. LUBRICATION ENGINEERING, 2015, 40(5): 47~51, 63
[12] 郭红, 张直明, 张绍林, 等. 径向动压浮环轴承-转子系统多稳定区域研究[J]. 振动与冲击, 2016, 35(2): 168~172.
Guo Hong, Zhang Zhi-ming, Zhang Shao-lin, et al. Multi stable regions of hydrodynamic floating ring journal bearing-rotor system[J]. Journal of Vibration and Shock, 2016, 35(2): 168~172.
