|Table of Contents|

Influence of elastic element on static and dynamic characteristics of large tilting pad bearing(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2017年03期
Page:
83-89
Research Field:
载运工具运用工程
Publishing date:
2017-08-05

Info

Title:
Influence of elastic element on static and dynamic characteristics of large tilting pad bearing
Author(s):
XI Wen-kui1 HAN Qiang-hui2 HUANG Tian-hu2 XU Jian-ning1 JIANG Xiang-jun3
1. School of Mechanical Engineering, Xi'an Shiyou University, Xi'an 710065, Shaanxi, China; 2. Oil and Gas Technology Institute, Perto China Changqing Oil Field Company, Xi'an 710018, Shaanxi, China; 3. State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710054, Shaanxi, China
Keywords:
ship engineering tilting pad bearing thermal elastohydro-dynamic lubrication model elastic pad pivot static and dynamic property stability
PACS:
U664.21
DOI:
-
Abstract:
In order to improve the dynamic stability of warship unit and restrain vibration effectively, a new technology of pivot elasticity was applied to the tilting pad bearing structure of warship propulsion shafting system, and the butterfly spring was mounted at the pad pivot of tilting pad bearing. A large gas turbine was taken as an object, the pivot elasticity structure was introduced into the four tilting pad bearings of large scale shaft, the temperature field, pressure field, stiffness and damping of tilting pad bearing were analyzed by using the fluid-solid-heat coupled model and the multi-field analysis technology, and the effect law of pivot elasticity technology on the tribology and dynamics behavior of tilting pad bearing were investigated.Analysis result shows that when the rotating speed is 3 000 r·min-1, the maximum oil film pressure of rigid pivot bearing is 6.5 MPa, and the maximum oil film pressure of spring pivot bearing is6.7 MPa and just increases a little compared with rigid pivot bearing. Meanwhile, the highest temperatures of two kinds of pivot structure bearings are 98.95 ℃ and 98.85 ℃, respectively, so the pivot elasticity technique has little effect on the bearings temperatures. With the increase of rotating speed, the main stiffnesses of two kinds of bearings decrease, but their cross stiffnesses change only in the range of ±0.1 MN·m-1. At the rotating speed of 3 000 r·min-1, the main stiffness and the main damping of spring pivot bearing are 3.5 GN· m-1 and 6 MN·s·m-1, respectively, which are 59% and 39% higher than the values of rigid support bearing. Obviously, the utilization of pivot elasticity technology has little effect on the bearing temperature, the maximum oil film pressure increases slightly, but the main stiffness and main damping of bearing increase obviously, which is favorable for the stability increase and vibration suppression of warship unit. 2 tabs, 13 figs, 26 refs.

References:

[1] 陈瑞克.1 000 MW超超临界汽轮发电机组轴系的稳定性[J].华电技术,2008,30(5):19-24. CHEN Rui-ke. Shafting stability of 1 000 MW ultra-supercritical turbine-generator set[J]. Huadian Technology, 2008, 30(5): 19-24.(in Chinese)
[2] 洪红伦,许吉敏,陈润霖,等.瓦块固有频率对可倾瓦轴承频变刚度的影响[J].润滑与密封,2016,41(3):10-14. HONG Hong-lun, XU Ji-min, CHEN Run-lin, et al. Effect of pad natural frequency on frequency-variation stiffness of tilting pad bearings[J]. Lubrication Engineering, 2016, 41(3): 10-14.(in Chinese)
[3] 袁小阳,谢友柏,张优云,等.大型轴系摩擦学及动力学设计的知识表达方法[J].西安交通大学学报,1998,32(4):89-93. YUAN Xiao-yang, XIE You-bai, ZHANG You-yun, et al. A knowledge representation method for tribological and dynamic design in large rotor-bearing system[J]. Journal of Xi'an Jiaotong University, 1998, 32(4): 89-93.(in Chinese)
[4] 席文奎.高参数转子系统多学科协同设计方法与应用研究[D].西安:西安交通大学,2012. XI Wen-kui. Study of multi-discipline collabrative design method and its application to high-parameter rotary system[D]. Xi'an: Xi'an Jiaotong University, 2012.(in Chinese)
[5] ABU-MAHFOUZ I, ADAMS M L. Numerical study of some nonlinear dynamics of a rotor supported on a three-pad tilting pad journal bearing[J]. Journal of Vibration and Acoustics, 2005, 127(3): 262 -272.
[6] CHILDS D W, CARTER C R. Rotordynamic characteristics of a five pad, rocker-pivot, tilting pad bearing in a load-on-pad configuration: comparisons to predictions and load between pad results[J]. Journal of Engineering for Gas Turbines and Power, 2009, 133( 8): 867-880.
[7] 王丽萍,乔 广,郑铁生.可倾瓦轴承的完整动力分析模型及计算方法[J].机械工程学报,2008,44(1):75-80. WANG Li-ping, QIAO Guang, ZHENG Tie-sheng. Analysis and calculate model for the complete dynamical coefficients of tilting-pad bearings[J]. Chinese Journal of Mechanical Engineering, 2008, 44(1): 75-80.(in Chinese)
[8] 王永亮,刘占生,钱大帅.可倾瓦轴承瓦块摆动特性[J].哈尔滨工业大学学报,2011,43(9): 62-66. WANG Yong-liang, LIU Zhans-heng, QIAN Da-shuai. Swing characteristic of pads in tilting pad bearing[J]. Journal of Harbin Institute of Technology, 2011, 43(9): 62-66.(in Chinese)
[9] 纪 峰,袁小阳,张宏涛,等.可倾瓦轴承动态特性计算模型及方法研究[J].汽轮机技术,2012,54(2):105-108. JI Feng, YUAN Xiao-yang, ZHANG Hong-tao, et al. The method and calcultion model of dynamic performances of oil- film of tilting pad bearing[J]. Turbine Technology, 2012, 54(2): 105-108.(in Chinese)
[10] 高庆水,刘 石,冯永新.不同载荷状态下可倾瓦轴承低频振动分析与比较[J].动力工程学报,2014,34(4):286-291. GAO Qing-shui, LIU Shi, FENG Yong-xin. Analysis and comparison of low-frequency vibration in tilting-pad journal bearing under different load cases[J]. Journal of Chinese Society of Power Engineering, 2014, 34(4): 286-291.(in Chinese)
[11] 徐 华,姜歌东,丛 红,等.四瓦可倾瓦径向滑动轴承动力特性的实验研究[J].摩擦学学报,2001,21(5):385-389. XU Hua, JIANG Ge-dong, CONG Hong, et al. Experimental study of dynamic characteristics of four tilting pad journal bearing[J]. Tribology, 2001, 21(5): 385-389.(in Chinese)
[12] SUH J, PALAZZOLO A. Three-dimensional dynamic model of TEHD tilting-pad journal bearing—Part Ⅰ: theoretical modeling[J]. Journal of Tribology, 2015, 137(4): 041703-1-11.
[13] SUH J, PALAZZOLO A. Three-dimensional dynamic model of TEHD tilting-pad journal bearing—Part Ⅱ: parametric studies[J]. Journal of Tribology, 2015, 137(4): 041704-1-15.
[14] 郭 勇.大机组可倾瓦轴承稳定性分析技术和性能试验[D].西安:西安交通大学,2012. GUO Yong. Study on the method for tilting-pad bearing stability in the large units and performance test[D]. Xi'an: Xi'an Jiaotong University, 2012.(in Chinese)
[15] WILKES J C, CHILDS D W. Improving tilting-pad journal bearing predictions—Part Ⅱ: comparison of measured and predicted rotor-pad transfer functions for a rocker-pivot tilting-pad journal bearing[J]. Journal of Engineering for Gas Turbines and Power, 2013, 135(1): 012503-1-11.
[16] KULHANEK C D, CHILDS D W. Measured static and rotor dynamic coefficient results for a rocker-pivot, tilting- pad bearing with 50% and 60% offsets[J]. Journal of Engineering for Gas Turbines and Power, 2012, 134(5): 052505- 1-11.
[17] SAN ANDRES L, TAO Y. The role of pivot stiffness on the dynamic force coefficients of tilting pad journal bearings[J]. Journal of Engineering for Gas Turbines and Power, 2013, 135(11): 112505-1-11.
[18] SHEN Jie-xi, XIONG Xin, LI Guo-ping, et al. Experimental analysis of dynamic oil film pressure of tilting-pad journal bearings[J]. Tribology Letters, 2016, 63(3): 1-9.
[19] GAINES J E, CHILDS D W. The impact of pad flexibility on the rotor dynamic coefficients of tilting-pad journal bearings[J]. Journal of Engineering for Gas Turbines and Power, 2016, 138(8): 082501-1-12.
[20] YAN Zhi-yong, LU Yi, ZHENG Tie-sheng. An analysis model of titling-pad journal bearing considering pivot stiffness and damping[J]. Journal of tribology, 2011, 133(1): 1-8.
[21] 陈朱杰,刘思涌,郑铁生.支点弹性、阻尼可倾瓦轴承转子系统性能的试验分析[J].复旦学报:自然科学版,2014,53(5):659- 665. CHEN Zhu-jie, LIU Si-yong, ZHENG Tie-sheng. Experimental analysis on characteristic of the rotor system supported by titling-pad journal bearing considering pivot stiffness and damping[J]. Journal of Fudan University: Nature Science, 2014, 53(5): 659-665.(in Chinese)
[22] YAN Zhi-yong, WANG Li-ping, QIAO Guang, et al. An analytical mode lfor complete dynamical coefficients of a tilting-pad journal bearing[J]. Tribology International, 2010, 43(1): 7-15.
[23] AL-GHASEM A M, CHILDS D W. Rotor dynamic coefficients measurements versus predictions for a high-speed flexure-pivot tilting-pad bearing(load-between-pad configuration)[J]. Turbo Expo: Power for Land, Sea, and Air, 2005, 128(4): 725-736.
[24] TSCHOEPE D P, CHILDS D W. Measurements versus predictions for the static and dynamic characteristics of a four-pad, rocker-pivot, tilting-pad journal bearing[J]. Journal of Engineering for Gas Turbines and Power, 2014, 136(5): 052501-1-11.
[25] SUH J, PALAZZOLO A, CHOI Y S. Numerical modeling and analysis of flexure-pivot tilting-pad bearing[J]. Journal of Tribology, 2017, 139(5): 1-13.
[26] ZHANG Chao, YI Zi-xia, ZHANG Zhi-ming. THD analysis of high speed heavily loaded journal bearings including thermal deformation, mass conserving cavitation, and turbulent effects[J]. Journal of Tribology, 2000, 122(3): 597-602.

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Last Update: 2017-08-05