Abstract
The coupled bearing (including four-pad tilting pad journal bearings and six-pad tilting pad thrust bearings) is mainly used in a nuclear power circulating pump to support the high axial loads and radial loads from a vertical rotary system with minimum power loss, low vibration, and high load capacity. Its lubrication and vibration characteristics have significant effects on the dynamic performance and operation reliability of the nuclear power circulating pump. In this paper, an original mixed-lubrication dynamic model for the coupled bearing-rotor system is proposed to study the dynamic characteristics of the system considering the effects of the pivot clearance, asperity contact, and elastic deformation. The innovation of the proposed model is that it integrates the horizontal-rocking vibrations of the rotor and pivot pads with the mixed lubrication of the coupled bearing. The coupling effects between the dynamic characteristic of the rotor and the lubrication behavior of the coupled bearing are revealed. In addition, the time-dependent dynamic performance of the fixed pad coupled bearing and the tilting pad coupled bearing are compared. Numerical results indicate that the self-adaptive tilt of the pad makes the oil film pressure more evenly distributed on each pad of the journal and thrust bearings. The tilting pad coupled bearing can effectively improve vibration resistance, system stability, and load-sharing capacity compared to the fixed pad coupled bearing. It is expected that the proposed mixed-lubrication dynamic model can provide guidance for improving the lubrication performance of the coupled bearing and the stability of the system.
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References
Xiang, G., Han, Y., Wang, J., Xiao, K., Li, J.: Influence of axial microvibration on the transient hydrodynamic lubrication performance of misaligned journal–thrust microgrooved coupled bearings under water lubrication. Tribol. Trans. 64(4), 579–592 (2021)
Kim, M., Jang, G., Kim, H.: Stability analysis of a disk-spindle system supported by coupled journal and thrust bearings considering five degrees of freedom. Tribol. Int. 43(8), 1479–1490 (2010)
Liu, S., Xiao, Z., Yan, Z., Chen, Z.: Vibration characteristics of rotor system with tilting-pad journal bearing of elastic and damped pivots. J. Cent South Univ. 22(1), 134–140 (2015)
Xiang, G., Han, Y., Wang, J., Wang, J., Ni, X.: Coupling transient mixed lubrication and wear for journal bearing modeling. Tribol. Int. 138, 1–15 (2019)
Dimond, T., Younan, A., Allaire, P.: A review of tilting pad bearing theory. Int. J. Rotating Mach. (2011)
Benti, G.B., Rondon, D., Gustavsson, R., Aidanpää, J.-O.: Numerical and experimental study on the dynamic bearing properties of a four-pad and eight-pad tilting pad journal bearings in a vertical rotor. J. Energy Resour. Technol. 144(1) (2022)
Haugaard, A.M., Santos, I.F.: Stability of multi orifice active tilting-pad journal bearings. Tribol. Int. 43(9), 1742–1750 (2010)
Rendl, J., Dyk, Š, Smolík, L.: Nonlinear dynamic analysis of a tilting pad journal bearing subjected to pad fluttering. Nonlinear Dyn. 105(3), 2133–2156 (2021)
Suh, J., Choi, Y.: Pivot design and angular misalignment effects on tilting pad journal bearing characteristics: four pads for load on pad configuration. Tribol. Int. 102, 580–599 (2016)
van Beek, A., Lepic, L.: Rubber supported hydrostatic thrust bearings with elastic bearing surfaces of infinite length. Wear 201(1–2), 45–50 (1996)
van Beek, A., Segal, A.: Rubber supported hydrostatic thrust bearings with rigid bearing surfaces. Tribol. Int. 30(1), 47–52 (1997)
Sun, F., Zhang, X., Wei, Y., Wang, X., Wang, D.: Stability analysis of rubber-supported thrust bearing in a rotor-bearing system used in marine thrusters under disturbing moments. Tribol. Int. 151, 106356 (2020)
Liang, X., Yan, X., Ouyang, W., Wood, R.J.K., Liu, Z.: Thermo-elasto-hydrodynamic analysis and optimization of rubber-supported water-lubricated thrust bearings with polymer coated pads. Tribol. Int. 138, 365–379 (2019)
Liang, X., Yan, X., Ouyang, W., Liu, Z.: Experimental research on tribological and vibration performance of water-lubricated hydrodynamic thrust bearings used in marine shaft-less rim driven thrusters. Wear 426–427, 778–791 (2019)
Wang, Y., Wang, Q.J., Lin, C.: Mixed lubrication of coupled journal-thrust-bearing systems including mass conserving cavitation. J. Tribol. 125(4), 747–755 (2003)
Wang, Y., Jane Wang, Q., Lin, C.: A mixed-EHL analysis of effects of misalignments and elastic deformations on the performance of a coupled journal-thrust bearing system. Tribol. Int. 39(4), 281–289 (2006)
Kim, K., Lee, M., Lee, S., Jang, G.: Optimal design and experimental verification of fluid dynamic bearings with high load capacity applied to an integrated motor propulsor in unmanned underwater vehicles. Tribol. Int. 114, 221–233 (2017)
Xiang, G., Wang, J., Zhou, C., Shi, Y., Wang, Y., et al.: A tribo-dynamic model of coupled journal-thrust water-lubricated bearings under propeller disturbance. Tribol. Int. 160(January), 107008 (2021)
Mehdi, S.M., Jang, K.E., Kim, T.H.: Effects of pivot design on performance of tilting pad journal bearings. Tribol. Int. 119, 175–189 (2018)
Xie, Z., Zhu, W.: An investigation on the lubrication characteristics of floating ring bearing with consideration of multi-coupling factors. Mech. Syst. Signal Process. 162, 108086 (2022)
Patir, N., Cheng, H.S.: An average flow model for determining effects of three-dimensional roughness on partial hydrodynamic lubrication. J. Lubr. Technol. 100(1), 12–17 (1978)
Ng, C.-W., Pan, C.H.T.: A linearized turbulent lubrication theory. J. Basic Eng. 87(3), 675–682 (1965)
Yin, L., Deng, C., Yu, W., Shao, Y., Wang, L.: Dynamic characteristics of gear system under different micro-topographies with the same roughness on tooth surface. J. Cent South Univ. 27(8), 2311–2323 (2020)
Zhang, C., Yu, W., Yin, L., Zeng, Q., Chen, Z., et al.: Modeling of normal contact stiffness for surface with machining textures and analysis of its influencing factors. Int. J. Solids Struct. 262–263, 112042 (2022)
Greenwood, J.A., Tripp, J.H.: The contact of two nominally flat rough surfaces. Proc. Inst. Mech. Eng. 185(1), 625–633 (1970)
Yu, W., Mechefske, C.K., Timusk, M.: The dynamic coupling behaviour of a cylindrical geared rotor system subjected to gear eccentricities. Mech. Mach. Theory 107, 105–122 (2017)
Acknowledgment
This work was supported by the National Natural Science Foundation of China (Grant No. 52105086) and the National Key R&D Program of China (Grant No. 2020YFB2010103). We are grateful to the Fundamental Research Funds for the Central Universities (Grant No. 2022CDJGFCG004, 2022CDJKYJH049).
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Yu, W., Zhang, C., Zhang, L. (2024). Comparison Studies of Dynamic Characteristics for Coupled Bearing-Rotor Systems with Fixed and Pivot-Supported Pads. In: Jing, X., Ding, H., Ji, J., Yurchenko, D. (eds) Advances in Applied Nonlinear Dynamics, Vibration, and Control – 2023. ICANDVC 2023. Lecture Notes in Electrical Engineering, vol 1152. Springer, Singapore. https://doi.org/10.1007/978-981-97-0554-2_56
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DOI: https://doi.org/10.1007/978-981-97-0554-2_56
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