基于两相流理论滑动轴承动力特性求解

孙丹; 张楚; 郭瑞; 杨建刚

基于两相流理论滑动轴承动力特性求解

1.
沈阳航空航天大学航空航天工程学部,110136 沈阳
2.
广东电网公司电力科学研究院,510080 广州
3.
东南大学能源与环境学院火电机组振动国家工程研究中心,210096 南京

基金项目: 沈阳航空航天大学博士科研启动基金

计量
- 文章访问数: 1680
- HTML浏览量: 3
- PDF量: 1475
- 被引次数: 0
出版历程
- 收稿日期: 2012-02-19
- 刊出日期: 2012-12-28

Solution of dynamic characteristics of journal bearing based on two phase flow theory

1.
Engineering Division of Aerospace, Shenyang Aerospace University, Shenyang 110136, China
2.
Electric Power Research Institute, Guangdong Power Grid Corporation, Guangzhou 510080, China
3.
National Engineering Research Center of Turbogenerator Vibration, School of Energy and Environment, Southeast University, Nanjing 210096, China

摘要

摘要: 将计算流体动力学(CFD)两相流与动网格技术应用于滑动轴承动力特性数值求解,建立了基于CFD两相流滑动轴承动力特性求解模型,该模型无需设定油膜破裂边界条件且更能准确模拟滑动轴承流场特性.比较了单相流与两相流滑动轴承压力分布特性,计算分析了滑动轴承气穴分布特征及其影响因素,研究了两相流模型对滑动轴承动力特性的影响.计算结果表明:气化比例随着转速、偏心率和气化压力的增加而迅速增大,随进口压力的增加而缓慢减小.考虑两相流后,直接刚度系数增加,交叉刚度系数减小,直接与交叉阻尼系数均减小.随着偏心率的增加,单相流与两相流动力特性系数求解结果偏差增大.
- 滑动轴承 /
- 动力特性 /
- 计算流体力学 /
- 两相流 /
- 动网格
Abstract: The computational fluid dynamics(CFD) two phase flow and dynamic mesh technologies were applied to the numerical calculation of dynamic characteristics of journal bearing.A new journal bearing dynamic characteristic solving model using the two phase flow theory of CFD model was established.The two phase flow theory of computational fluid dynamics for the journal bearing dynamic characteristics did not need to define the oil film rupture boundary condition, and it can generate more complementary and more accurate flow information.The pressure distribution characteristics of the sliding bearing were compared, and the cavitation characteristics and the effects of the journal bearing were calculated.Finally, the effect of the two phase flow theory of CFD model on dynamic characteristics of journal bearing was analyzed.Calculation results show that the cavitation ratio increases significantly with the increase of rotating speed, eccentricity, and vaporization pressure, and decreases slowly with the increase of inlet pressure.Using two phase flow, calculation results also show that the direct stiffness increases, the cross stiffness decreases and the direct and cross dampings decrease.The deviation between the single phase flow and the two phase flow increases with the increase of eccentricity.
- journal bearing /
- dynamic characteristics /
- computational fluid dynamics (CFD) /
- two phase flow /
- dynamic mesh

HTML

参考文献(15)

[1]	康召辉,任兴民,何尚文,等.浮环涡动对浮动环轴承油膜压力分布影响的研究[J].航空动力学报,2010,25(5):1197-1202.KANG Zhaohui,REN Xingmin,HE Shangwen,et al. Study on the effects of whirling motion of the floating ring on distribution of oil pressure in a floating ring bearing[J].Journal of Aerospace Power,2010,25(5):1197-1202.(in Chinese)
[2]	杨建刚,郭瑞,高亹.基于径向基函数的滑动轴承压力分布求解模型[J].中国电机工程学报,2005,25(6):157-158.YANG Jiangang,GUO Rui,GAO Wei.The bearing pressure distribution calculation model based on radial basis function theory[J].Proceedings of the CSEE,2005,25(6):157-158.(in Chinese)
[3]	吕延军,张永芳,季丽芳,等.固定瓦-可倾瓦滑动轴承转子非线性系统的动力特性分析[J].中国电机工程学报,2010,30(20):79-87.LV Yanjun,ZHANG Yongfang,JI Lifang,et al.Analysis of dynamic characteristics of rotor nonlinear system supported by fixed-tilting pad journal bearings[J].Proceedings of the CSEE,2010,30(20):79-87.(in Chinese)
[4]	孙丹,杨建刚,郭瑞.基于局部微分求积-拉格朗日法的滑动轴承动力特性求解模型[J].中国电机工程学报,2011,31(14):90-95.SUN Dan,YANG Jiangang,GUO Rui.The journal bearing dynamic characteristics calculation model based on the local DQ-Lagrange method[J].Proceedings of the CSEE,2011,31(14):90-95.(in Chinese)
[5]	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].Proceeding of the CSEE,2010,30(29):80-84.(in Chinese)
[6]	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.
[7]	Gertzos K P,Nikolakopoulos P G,Papadopoulos C A.CFD analysis of journal bearing hydrodynamic lubrication by Bingham lubricant[J].Tribology International,2008,41(12):1190-1204.
[8]	高庆水,杨建刚.基于CFD方法的液体动压滑动轴承动特性研究[J].润滑与密封,2008,33(9):65-67.GAO Qingshui,YANG Jiangang.Research on the dynamic characteristics of hydrodynamical journal bearing based on CFD analysis[J].Lubrication Engineering,2008,33(9):65-67.(in Chinese)
[9]	Cole J A,Huges C J.Oil flow and film extent in complete journal bearing[J].Proceedings of the Institution of Mechanical Engineers,1956,170(1):499-510.
[10]	Cole J A,Huges C J.Visual study of film extent in dynamieally loaded complete journal bearings[R].London:IME Conference on Lubrieation and Wear,1957.
[11]	Cole J A.Low pressure regions occurring in the hydrodynamic films of joumal bearings[J].Scientific Lubrieation,1951,3(1):1-10.
[12]	Sun D C,Brewe D E.A high-speed photography study of cavitation in a dynamically loaded journal bearing[J].Journal of Tribology,1991,133(6):287-294.
[13]	杨莹.螺旋油楔滑动轴承空穴特性的理论与实验研究[D].济南:山东大学,2010.YANG Ying.Theoretical and experimental study on the cavitation characteristics of a spiral oil wedge journal bearing[D].Jinan:Shandong University,2010.(in Chinese)
[14]	Dellis P,Arcoumanis C.Cavitation development in the lubricant film of a reciprocating piston-ring assembly[J].Journal of Engineering Tribology,2004,218(3):157-171.
[15]	Luis S.Cavitation in liquid film bearings[EB/OL].[2012-02-19].Http://www.Users/Administrator/AppData/Roaming/360se/WebCache/PDF/PdfTemplate.html.