The oil lubricating hydrodynamic journal bearing is an important load-bearing component of the large rotating machinery. In its clearance, the hydrodynamic-pressured and cavitation effect coexist, forming the gas-liquid two phase flow, the characteristics of which affect both the bearing performance and safety operation of the equipment. The influence of non-condensable gas(NCG) contend in lubricating oil is investigated. It is considered that NCG can cause the oil to deviate from its nominal performance and involve in the gas-liquid mass transfer process. The coupling relationship between hydrodynamic-pressured and cavitation effect based on the flow feature in bearing clearance is present; moreover, a 3D flow field simulation model using the two phase flow theory of computational fluid dynamics(CFD) is set up. The full cavitation model and gas-liquid mixture model are applied in the approach. It is concluded that the flow characteristic trend is piecewise, a certain series of features applying to a certain interval of the NCG’s domain. The characteristic of the flow, such as the max pressure, the max gas contend and the bearing load force, tend to be non-monotone with the change of NCG contend, there is a peak interval. Calculation results also show that the migration of the pressure field distribution area, and phase field distribution occur with the NCG variation.
GUO Rui
,
ZHAO Guoyao
,
WANG Zhifang
,
FU Xingjun
,
YANG Jiangang
,
ZHU Xiaodong
. Studies on the Influence of Non-condensable Gas Contended in Lubricating Oil on Performance of Hydrodynamic Journal Bearing[J]. Journal of Mechanical Engineering, 2016
, 52(12)
: 152
-157
.
DOI: 10.3901/JME.2016.12.152
[1] 张直明,张岩羊,谢友柏,等. 滑动轴承的流体动力润滑理论[M]．北京：高等教育出版社,1986．
ZHANG Zhiming,ZHANG Yanyang,XIE Youbai,et al. The fluid dynamic lubricant theory of the journal bearing[M]. Beijing：Higher Education Press,1986.
[2] YANG Ying,LU Changhou．The research on moving of cavities of a novel spiral oil wedge journal bearing[C]// Proceedings of the 7th International Conference on Control and Automation(ICCA’09),Christchurch,New Zealand,2009：1213-1216.
[3] BRAUN M J,HANNON W M. Cavitation formation and modeling for fluid film bearings：A review[J]. Journal of Engineering Tribology,2010,224：839-863.
[4] GUO Zenglin,HIRANO T,GORDON K R．Application of cfd analysis for rotating machinery-part I：Hydrodynamic,hydrostatic bearings and squeeze film damper[J]. Journal of Engineering for Gas Turbines and Power,2005,127(2)：445-451.
[5] GERTZOS K P,NIKOLAKOPOULOS P G,PAPADOPOULOS C A． CFD analysis of journal bearing hydrodynamic lubrication by Bingham lubricate[J]. Tribology International,2008,41(12)：1190-1204.
[6] HU Yong,BALENDRA R．CFD analysis on the lubrication behaviors of journal bearing with dimples[C/CD]//Proceeding of IEEE 2009 International Conference on Mechatronics and Automation,Changchun,China,2009．
[7] 李元生,敖良波,李磊,等．滑动轴承动力特性系数动态分析方法[J]． 机械工程学报,2010,46(21)：48-53.
LI Yuansheng,AO Liangbo,LI Lei,et al . Dynamic analysis method of dynamic character coefficient of hydrodynamic journal bearing[J]. Journal of Mechanical Engineering,2010,46(21)：48-53.
[8] 张楚,杨建刚,郭瑞,等．基于两相流理论的滑动轴承流场计算分析[J]. 中国电机工程学报,2010,30(29)：80-84.
ZHANG Chu,YANG Jiangang,GUO Rui,et al. Simulation of journal bearing flow field using computational fluid dynamics two phase flow theory [J]. Proceedings of the CSEE,2010,30(29)：80-84.
[9] WANG Jinli,CAI Lin,ZHENG Hongtao. Numerical investigation on hydrodynamic journal bearing with a center circumferential groove in cavitation zone[J]. International Journal of Advancements in Computing Technology,2011(3)：250-257.
[10] 熊万里,侯志泉,吕浪,等．基于动网格模型的液体动静压轴承刚度阻尼计算方法研究[J]．机械工程学报,2012,48(23)：118-126.
XIONG Wanli,HOU Zhiquan,LÜ Lang,et al. Method for calculating stiffness and damping coefficients of hybrid bearings based on dynamic mesh model[J]. Journal of Mechanical Engineering,2012,48(23)：118-126.
[11] 黄继汤．空化与空蚀的原理及应用[M]．北京：清华大学出版社,1991.
HUANG Jitang. The principle and application of cavitation and cavitation erosion[M]. Beijing ：Tsinghua University Press,1991.
[12] 苏荭,王小静,张直明. 动载工况下滑动轴承油膜边界历史迁移问题[J]. 机械工程学报,2006,42(4)：8-12.
SU Hong,WANG Xiaojing,ZHANG Zhiming. History moving of cavition for dynamically loaded journal bearing[J]. Chinese Journal of Mechanical Engineering,2006,42(4)：8-12.
[13] 吴昊天,陈国定．轴承腔油气两相泡状流动的数值研究[J]. 机械工程学报,2008,44(9)：70-75.
WU Haotian,CHEN Guoding．Numerical research on two phase gas/oil bubble flow in bearing chamber[J]. Chinese Journal of Mechanical Engineering,2008,44(9)：70-75.
[14] 鲁钟琪. 两相流与沸腾传热[M]. 北京：清华大学出版社,2002.
LU Zhongqi. Two-phase flow and boiling heat transfer[M]. Beijing：Tsinghua University Press,2002.
[15] BRENNEN C E. Cavitation and bubble dynamics[M]. New York：Oxford University Press,1995.
[16] 袁德文,潘良明,陈德奇,等．窄流道内压力对汽泡动力学特性的影响[J]．工程热物理学报,2009,30(4)：605-607．
YUAN Dewen,PAN Liangming,CHEN Deqi,et al. Pressure effects of narrow channel on the characteristics of bubble dynamics[J]. Journal of Engineering Thermophysics,2009,30(4)：605-607.
[17] SINGHAL A K ,ATHAVALE M M ,LI M,et al. Mathematical basis and validation of the full cavitation model[J]. Journal of Fluid Engineering,2002,124(3)：617-624.
[18] 郭关柱,范毓润,贾风昌．空气在二甲基硅油和液压油中的溶解度[J]. 物理化学学报,2008,24(7)：1225-1232.
GUO Guanzhu,FAN Yurun,JIA Fengchang. Solubility of air in dimethyl silicone and hydraulic oils[J]. Acta Phys.-Chim. Sin.,2008,24(7)：1225-1232.
[19] 孟玉婵,李荫才,贾瑞君,等．油中溶解气体分析及变压器故障诊断[M]. 北京：中国电力出版社,2012.
MENG Yuchan,LI Yincai,JIA Ruijun,et al. Analysis of dissolved gas in oil and transformer fault diagnosis[M]. Beijing：China Electric Power Press,2012.
