|
|
|
| Dynamic characteristics of tilting pad journal bearing-rotor system considering pad wear |
| ZHANG Chaodong1,2, YU Wennian1,2, ZHANG Lu1,3 |
| 1. College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China;
2. State Key Lab for Mechanical Transmission of Advanced Equipment, Chongqing University, Chongqing 400044, China;
3. CRRC Zhuzhou Electric Locomotive Co., Ltd., Zhuzhou 412001, China |
|
|
|
|
Abstract Aiming at coupling modeling of lubrication and vibration characteristics for tilting pad journal-rotor systems with pad wear fault, an original mixed-lubrication dynamic model for the tilting pad journal bearing-rotor system is proposed considering the effects of pad wear, rotor and pad horizontal-rocking vibrations, and bearing mixed lubrication. The dynamic responses of the rotor vibration and the bearing lubrication under different wear rates are studied. The effects of different parameters (rotor eccentricity, rotating speed and preload factor, etc.) on the dynamic characteristics of the tilting pad journal bearing-rotor system with worn pads are evaluated. Compared to the bearing without worn pads, the acceleration peak frequency of the rotor for the bearing with worn pads excites the additional even harmonics of the rotating frequency. The occurrence of multi-pad wear can cause a significant increase in the vibration response of the rotor and the oil film pressure of the bearing. These results provide a theoretical basis for condition monitoring and fault identification of tilting pad bearing and rotor systems.
|
|
Received: 09 August 2023
Published: 15 June 2024
|
|
|
|
| [1] 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 [J]. Tribology International, 2010, 43(8): 1479-1490.
[2] 罗庆, 董庆兵, 赵滨, 等. 分片式可变间隙径向滑动轴承混合润滑研究 [J/OL]. 摩擦学学报, 2023: 1-23.
LUO Qing, DONG Qingbing, ZHAO Bin, et al. A study on mixed lubrication of multi-pad journal bearing with variable clearance [J/OL]. Tribology International, 2023: 1-23.
[3] 朱军超, 钱海俣, 郑良焱, 等. 考虑应力偶计入区间及黏 压效应的倾斜轴承非牛顿流体润滑特性研究 [J]. 机械工程学报, 2021, 57(9): 139-146.
ZHU Junchao, QIAN Haiyu, ZHENG Liangyan, et al. Analysis of misaligned journal bearing lubrication performance with consideration of couple stress lubricant area and viscosity-pressure effect [J]. Journal of Mechanical Engineering, 2021, 57(9): 139-146.
[4] 朱少禹, 孙军, 李彪, 等. 计及轴颈倾斜的径向滑动轴承湍流润滑分析 [J]. 摩擦学学报, 2019, 39(2): 235-247.
ZHU Shaoyu, SUN Jun, LI Biao, et al. Analysis of turbulent lubrication of misaligned journal bearing [J]. Tribology International, 2019, 39(2): 235-247.
[5] 刘洋洋, 金英泽, 王亚兵, 等. 表面粗糙度对低速水润滑滑动轴承混合润滑性能的影响 [J]. 西安交通大学学报, 2020, 54(7): 121-128.
LIU Yangyang, JIN Yingze, WANG Yabing, et al. Effect of surface roughness on mixed-lubrication performance of low-speed and water-lubricated sliding bearings [J]. Journal of Xi'an Jiao Tong University, 2020, 54(7): 121-128.
[6] WANG Y S, WANG Q J, LIN C. A mixed-EHL analysis of effects of misalignments and elastic deformations on the performance of a coupled journal-thrust bearing system [J]. Tribology International, 2006, 39(4): 281-289.
[7] XIANG G, WANG J X, ZHOU C D, et al. A tribo-dynamic model of coupled journal-thrust water-lubricated bearings under propeller disturbance [J]. Tribology International, 2021, 160: 107008.
[8] 魏维, 郭文勇, 吴新跃, 等. 考虑滑动轴承时变动力学参数的齿轮系统建模及分析 [J]. 振动与冲击, 2019, 38(23): 246-252.
WEI Wei, GUO Wenyong, WU Xinyue, et al. Gear system modeling considering sliding bearings’ time-varying dynamic parameters [J]. Journal of Vibration and Shock, 2019, 38(23): 246-252.
[9] MEHDI S M, JANG K E, KIM T H. Effects of pivot design on performance of tilting pad journal bearings [J]. Tribology International, 2018, 119: 175-189.
[10] XIE Z L, ZHU W D. An investigation on the lubrication characteristics of floating ring bearing with consideration of multi-coupling factors [J]. Mechanical Systems and Signal Processing, 2022, 162: 108086.
[11] HAUGAARD A M, SANTOS I F. Stability of multi orifice active tilting-pad journal bearings [J]. Tribology International, 2010, 43(9): 1742-1750.
[12] BENTI G B, RONDON D, GUSTAVSSON R, et al. 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]. Journal of Energy Resources Technology, 2022, 144(1): 011304.
[13] RENDL J, DYK Š, SMOLÍK L. Nonlinear dynamic analysis of a tilting pad journal bearing subjected to pad fluttering [J]. Nonlinear Dynamics, 2021, 105(3): 2133-2156.
[14] 吕延军, 张永芳, 于杨冰, 等. 固定瓦－可倾瓦组合径向轴承－柔性转子系统非线性运动分析 [J]. 振动与冲击, 2011, 30(5): 257-262.
LU Yanjun, ZHANG Yongfang, YU Yangbing, et al. Nonlinear dynamic analysis of a flexible rotor system with combined fixed-tilting pad journal bearings [J], Journal of Vibration and Shock, 2011, 30(5): 257-262.
[15] 金英泽, 袁小阳. 考虑支点变形和摩擦的可倾瓦轴承动力学特性研究 [J]. 振动与冲击, 2022, 41(20): 61-67+167.
JIN Yingze, YUAN Xiaoyang. Dynamic characteristic analysis of tilting-pad journal bearings considering deformation and friction of pivot [J]. Journal of Vibration and Shock, 2022, 41(20): 61-67+167.
[16] VENCL A, RAC A. Diesel engine crankshaft journal bearings failures: Case study [J]. Engineering Failure Analysis, 2014, 44: 217-228.
[17] LEE D, SUN K H, KIM B, et al. Thermal behavior of a worn tilting pad journal bearing: thermohydrodynamic analysis and pad temperature measurement [J]. Tribology Transactions, 2018, 61(6): 1074-1083.
[18] YANG T Y, HAN Y F, WANG Y J, et al. Numerical analysis of the transient wear and lubrication behaviors of misaligned journal bearings caused by linear shaft misalignment [J]. Journal of Tribology, 2022, 144(5): 051801.
[19] MACHADO T H, CAVALCA K L. Modeling of hydrodynamic bearing wear in rotor-bearing systems [J]. Mechanics Research Communications, 2015, 69: 15-23.
[20] 宋新涛, 孙士青, 吴维. 考虑局部磨损和空化效应的径向滑动轴承混合润滑分析 [J]. 华南理工大学学报(自然科学版), 2020, 48(8): 102-107.
SONG Xintao, SUN Shiqing, WU Wei, et al. Mixed － lubrication analysis of journal bearing considering local wear and cavitation effect [J]. Journal of South China University of Technology (Natural Science Edition), 2020, 48(8): 102-107.
[21] 李强, 唐心昊, 张硕, 等. 磨损工况下可倾瓦轴承性能研究 [J]. 中国石油大学学报 (自然科学版), 2021, 45(5): 128-135.
LI Qiang, TANG Xinhao, ZHANG Shuo, et al. Study on performance of tilting pad journal bearings under wear condition [J]. Journal of China University of Petroleum (Edition of Natural Science), 2021, 45(5): 128-135.
[22] TOFIGHI-NIAKI E, SAFIZADEH M S. Dynamic of a flexible rotor-bearing system supported by worn tilting journal bearings experiencing rub-impact [J]. Lubricants, 2023, 11(5): 212.
[23] PATIR N, CHENG H S. An average flow model for determining effects of three-dimensional roughness on partial hydrodynamic lubrication [J]. Journal of Lubrication Technology, 1978, 100(1): 12-17.
[24] NG C W, PAN C H T. A linearized turbulent lubrication theory [J]. Journal of Basic Engineering, 1965, 87(3): 675-682.
[25] PARK T J, KIM K W. Elastohydrodynamic lubrication of a finite line contact [J]. Wear, 1998, 223(1-2): 102-109.
[26] XIANG G, HAN Y, WANG J, et al. Coupling transient mixed lubrication and wear for journal bearing modeling [J]. Tribology International, 2019, 138: 1-15.
[27] DUFRANE K F, KANNEL J W, MCCLOSKEY T H. Wear of steam turbine journal bearings at low operating speeds [J]. Journal of Lubrication Technology, 1983, 105(3): 313-317. |
|
|
|
