球面螺旋槽气体动压轴承静态特性分析
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摘要
以球面螺旋槽气体动压轴承为研究对象,建立了球面螺旋槽气体动压轴承的润滑分析数学模型,基于CFD技术,采用流体动力学Fluent软件,对球面螺旋槽气体动压轴承的三维气膜压力场进行分析,揭示不同转速下,轴承槽宽比、槽深比、螺旋角、气膜间隙对稳态轴承气膜压力以及承载能力的影响规律,并在此基础上,对轴承的结构参数进行了优化。结果表明,应用Fluent软件进行数值分析可以精确地模拟区域内气膜的复杂流场特性,并且转速越高,气体轴承内部的动压效应就越明显,因此合理地选择轴承结构参数和运行参数有助于改善润滑性能,提高轴承的稳态承载特性。
In order to research the static performances of spherical spiral groove aerodynamic bearings,the bearing's lubrication analysis mathematical model is established. Based on CFD technology,and we use the fluid dynamics software Fluent to the Fluent software of fluid dynamics to analyze the 3D gas film pressure field of the spherical spiral groove aerodynamic bearings. It reveals the laws that effect of the groove width ratio,groove depth ratio,helix angle and gas film clearance under different rotation speed on the steady-state bearing gas film pressure and the bearing capacity,and on this basis the structure of bearing parameters are optimized. The results show that the Fluent can easily and accurately simulate the complex flow field in the gas film area,and the higher rotation speed,the more obvious gas bearing internal hydrodynamic effect. Therefore,choosing reasonable bearing structural and operating parameters contributes to improve the lubrication performance and bearing capacity.
In order to research the static performances of spherical spiral groove aerodynamic bearings,the bearing's lubrication analysis mathematical model is established. Based on CFD technology,and we use the fluid dynamics software Fluent to the Fluent software of fluid dynamics to analyze the 3D gas film pressure field of the spherical spiral groove aerodynamic bearings. It reveals the laws that effect of the groove width ratio,groove depth ratio,helix angle and gas film clearance under different rotation speed on the steady-state bearing gas film pressure and the bearing capacity,and on this basis the structure of bearing parameters are optimized. The results show that the Fluent can easily and accurately simulate the complex flow field in the gas film area,and the higher rotation speed,the more obvious gas bearing internal hydrodynamic effect. Therefore,choosing reasonable bearing structural and operating parameters contributes to improve the lubrication performance and bearing capacity.
引文
[1]王云飞.气体润滑理论与气体轴承设计[M].北京:机械工业出版社,1999.
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[3]Satish C Sharma,Vikas M Phalle,S C Jain.Performance Analysis of a Multirecess Capillary Compensated Conical Hydrostatic Journal Bearing[J].Tribology International,2011,44(5):617-626.
[4]卢志伟,魏明明,刘波.圆锥型螺旋槽气体动压轴承气膜压力分析[J].西安工业大学学报,2008,(3):224-228.
[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]K P Gertzos,P G Nikolakopoulos,C A Papadopoulos.CFD Analysis of Journal Bearing Hydrodynamic Lubrication by Bingham Lubricant[J].Tribology International,2008,41(12):1190-1240.
[7]Guo Z L,Hirano T,Kirk R G.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.
[8]贾晨辉,杨伟,邱明.锥面螺旋槽气体轴承静特性分析[J].润滑与密封,2013,(2):63-67.
[9]赵旺升,李江涛.球面等角螺旋槽参数方程建模与数控加工[Z].北京航天控制仪器研究所,2011.
[10]马文琦,刘福强.高压气体球轴承的流场特性研究[D].大连:大连海事大学,2011.
[11]卢志伟,刘波,张君安.风力驱动气体动压轴承性能研究[D].西安:西安工业大学,2008.
[2]康伟,张家忠,等.气体动压轴承-转子动力系统稳定性及分岔[J].航空动力学报,2007,22(9):1537-1543.
[3]Satish C Sharma,Vikas M Phalle,S C Jain.Performance Analysis of a Multirecess Capillary Compensated Conical Hydrostatic Journal Bearing[J].Tribology International,2011,44(5):617-626.
[4]卢志伟,魏明明,刘波.圆锥型螺旋槽气体动压轴承气膜压力分析[J].西安工业大学学报,2008,(3):224-228.
[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]K P Gertzos,P G Nikolakopoulos,C A Papadopoulos.CFD Analysis of Journal Bearing Hydrodynamic Lubrication by Bingham Lubricant[J].Tribology International,2008,41(12):1190-1240.
[7]Guo Z L,Hirano T,Kirk R G.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.
[8]贾晨辉,杨伟,邱明.锥面螺旋槽气体轴承静特性分析[J].润滑与密封,2013,(2):63-67.
[9]赵旺升,李江涛.球面等角螺旋槽参数方程建模与数控加工[Z].北京航天控制仪器研究所,2011.
[10]马文琦,刘福强.高压气体球轴承的流场特性研究[D].大连:大连海事大学,2011.
[11]卢志伟,刘波,张君安.风力驱动气体动压轴承性能研究[D].西安:西安工业大学,2008.