基于3D瞬态流场计算的滑动轴承非线性油膜力分析

摘要
图/表
参考文献(13)
相关文章 (15)

全文: PDF (1527 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要滑动轴承非线性油膜力的计算结果直接决定了转子-轴承系统非线性动力学分析的精度和效率。针对轴颈扰动下滑动轴承瞬态流场计算中的网格畸变问题，本文提出了一种适用于小间隙流场3D瞬态计算的变流域动网格技术。通过对滑动轴承润滑流场的瞬态计算，对不同扰动下的线性油膜力与瞬态油膜力进行了对比，并在考虑油膜非线性的影响下，分析了瞬态油膜力径向和切向分量的变化过程。结果表明：大扰动工况下，滑动轴承的动特性分析有必要计入油膜非线性的影响；进油口和油槽的存在会明显降低径向油膜力，导致油膜支撑刚度降低；瞬态油膜力切向分量的减小导致了滑动轴承阻尼的降低，进而引起油膜失稳。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：滑动轴承, 计算流体力学（CFD）, 非线性油膜力, 瞬态计算

Abstract：The result of the nonlinear oil film force analysis of journal bearings directly determines the accuracy and efficiency of the nonlinear dynamic analysis of the rotor bearing system.According to the transient analysis of nonlinear oil film force of journal bearings under large disturbance, this paper proposes a dynamic mesh method of structure grids suitable for 3D transient flow field calculation.The linear and nonlinear oil film forces under different disturbance were compared.Under the influence of oil film nonlinearity, the radial and tangential components of transient oil film force were analyzed.It was observed that the disturbance impact was necessary to be taken into consideration in the analysis of nonlinear oil film force; the oil inlet and the oil tank will significantly reduce the radial oil film force, causing the support stiffness reduction.The decrease of the tangential component of transient oil film force causes the reduction of journal bearing damping, thereby causing oil film instability.

Key words： journal bearing computational fluid dynamic (CFD) nonlinear oil film force transient calculation

收稿日期: 2017-03-02 出版日期: 2018-10-15

引用本文:

李强1 张硕1 许伟伟2. 基于3D瞬态流场计算的滑动轴承非线性油膜力分析[J]. 振动与冲击, 2018, 37(20): 141-147.
LI Qiang1，ZHANG Shuo1，XU Weiwei2. Analysis of nonlinear oil film force of journal bearings based on 3D transient flow field calculation. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(20): 141-147.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2018/V37/I20/141

[1] Brancati R., Rocca E., Russo M., et al. Journal Orbits and Their Stability for Rigid Unbalanced Rotor [J]. ASME Journal of Tribology, 1995, 117:709-716.
[2] Brown R.D., Addison P., Chan A.H.C. Chaos in the Unbalance Response of Journal Bearings. Nonlinear Dynamic, 1994, 5: 421-432.
[3] 张永芳,刘成,王东,等.紊流滑动轴承油膜承载力的近似解[J]. 振动与冲击,2014,33(7):181-186.
Zhang Yong-fang, LIU Cheng, WANG Dong, et al. Approximate solution of to load-carrying capacity of a turbulent sliding bearing’s oil film [J].Journal of Vibration and Shock,2014,33(7):181-186.
[4] 马辉,李辉,牛和强,闻邦椿. 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,(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,(23): 100-104.
[5] Chen, P.Y.P., Hahn, E.J. Use of Computational Fluid Dynamics in Hydrodynamic Lubrication [J]. Journal of Engineering Tribology, 1998, 212(6): 427-436.
[6] Lin Q.Y., Wei Z.Y., Wang N., et al. Analysis on the Lubrication Performance of Journal Bearing System Using Computational Fluid Dynamics and Fluid-Structure Interaction Considering Thermal Influence and Cavitation [J]. Tribology International, 2013, 64: 8-15.
[7] Nabarun Biswas, Pandey K.M. Transient CFD Analysis of Multi-Lobe Bearings at 60000 RPM for a Gas Turbine [J]. International Journal of Engineering and Technology, 2011, 3(5): 512-517.
[8] Panday K.M., Choudhury P.L., Kumar N.P. Numerical Unsteady Analysis of Thin Film Lubricated Journal Bearing [J]. International Journal of Engineering and Technology, 2012, 4(2): 185-191.
[9] Li Q., Liu S.L., Pan X.H., Zheng S.Y. A New Method for Studying the 3D Transient Flow of Misaligned Journal Bearings in Flexible Rotor-Bearing Systems [J], Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2012, 13(4): 293-310.
[10] 李强,马龙,许伟伟,郑水英. 椭圆轴承—转子耦合系统动力学特性研究[J]. 振动与冲击,2016,(11):174-179.
LI Qiang, MA Long, XU Wei-wei, et al. Dynamic characteristic analysis of an elliptical bearing-rotor coupled system[J]. Journal of Vibration and Shock. 2016,(11):174-179.
[11] 李强，滑动轴承动力特性的3D瞬态流场计算和实验研究[D]. 杭州，浙江大学，2012：1-129.
LI Qiang. 3D transient flow calculation and experimental research on dynamica characteristics of journal bearing [D]. Hangzhou, Zhejiang University. 2012: 1-129.
[12] 李小江. 新型滑动轴承性能及其油膜由层流向紊流转变的过渡区研究[J]. 西安，西安交通大学, 1997.
LI Xiao-jiang. The research of performance and transition region from laminar to turbulent flow of oil film in a new journal bearing [J]. Xian, Xi’an Jiaotong University,1997.
[13] 孙大成. 润滑力学讲义[M]. 北京: 中国友谊出版公司，1991.
SUN Da-cheng. Lubrication mechanics lectures [M]. Beijing: China Friendship Publishing Company. 1991.