增压器浮环轴承润滑和散热性能的影响因素研究
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摘要
在以往对增压器浮环轴承润滑性能的研究中,大都忽略了转轴-浮环-轴承座之间的传热,这与实际的浮环润滑摩擦状况相去甚远,且没有研究浮环轴承的散热性能。考虑转轴-浮环-轴承座之间的热传递,建立转轴-浮环-轴承座热量传递模型,基于Reynolds方程和浮环平衡方程,建立浮环轴承润滑模型,同时对浮环轴承润滑性能和散热性能进行分析,研究浮环厚度、外层间隙、内圆宽度和外圆宽度对浮环轴承润滑和散热性能的影响规律。结果表明:减少浮环厚度可以明显改善浮环的润滑和散热性能;浮环外层间隙增加可以降低浮环温度,改善浮环轴承的散热性能;内圆宽度增加,环速比、内膜温度、浮环摩擦功耗和轴承座散热量增加;外圆宽度增加,环速比减小,轴承座散热量增加;黏压效应对浮环轴承润滑和散热性能的影响很小。
Previous studies on lubrication of floating ring bearing in turbocharger are neglected the heat transfer among the journal, floating ring and bearing block, making it away from the real lubrication and frictional characteristic. The model of heat transfer among the journal, floating ring and bearing block is established. Based on the Reynolds equation and floating ring balance equation, the lubrication model of floating ring bearing is established and the lubrication and heat dissipation performance of floating ring is analyzed at the same time. The effect of floating ring thickness, outer clearance, inner round width and outer round width on performance is studied. Results show that lubrication and heat dissipation performance of floating ring can be improved remarkably by decreasing floating ring thickness; outer clearance increases can decrease the floating ring temperature and improve the heat dissipation performance of floating ring; the more the inner circle width, the larger the floating ring speed, inner film temperature, floating ring temperature, power dissipation and heat dissipating capacity of bearing block; the more the outer circle width, the larger the floating ring speed and heat dissipating capacity of bearing block. The viscosity-pressure relationship has little relationship on the lubrication and heat dissipation performance.
Previous studies on lubrication of floating ring bearing in turbocharger are neglected the heat transfer among the journal, floating ring and bearing block, making it away from the real lubrication and frictional characteristic. The model of heat transfer among the journal, floating ring and bearing block is established. Based on the Reynolds equation and floating ring balance equation, the lubrication model of floating ring bearing is established and the lubrication and heat dissipation performance of floating ring is analyzed at the same time. The effect of floating ring thickness, outer clearance, inner round width and outer round width on performance is studied. Results show that lubrication and heat dissipation performance of floating ring can be improved remarkably by decreasing floating ring thickness; outer clearance increases can decrease the floating ring temperature and improve the heat dissipation performance of floating ring; the more the inner circle width, the larger the floating ring speed, inner film temperature, floating ring temperature, power dissipation and heat dissipating capacity of bearing block; the more the outer circle width, the larger the floating ring speed and heat dissipating capacity of bearing block. The viscosity-pressure relationship has little relationship on the lubrication and heat dissipation performance.
引文
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[2]HATAKENAKA K,TANAKA M,SUZUKI K.A theoretical analysis of floating bush journal bearing with axial oil film rupture being considered[J].ASME Journal of Tribology,2002,124(3):494-505.
[3]CHUN S M.A parametric study on bubble lubrication of high-speed journal bearings[J].Tribology International,2002,35(1):1-13.
[4]CHUN S M.Thermohydrodynamic lubrication analysis of high-speed journal bearing considering variable density and variable specific heat[J].Tribology International,2004,37(5):405-413.
[5]CHUN S M.Aeration effects on the performance of a turbocharger journal bearing[J].Tribology International,2008,41(4):296-306.
[6]ANDRES L S,KERTH J.Thermal effects on the performance of floatingring bearings for turbochargers[J].Journal of Engineering Tribology,2004,218-210(5):437-450.
[7]HOLT C,ANDRES L S,SAHAY S,et al.Test response and nonlinear analysis of a turbocharger supported on floating ring bearings[J].Transacations of the ASME,Journal of Tribology,2005,127(2):107-115.
[8]ANDRES L S,GJIKA K G,LARUE G.Rotordynamics of small turbochargers supported on floating ring bearings-highlights in bearing analysis and experimental validation[J].Transacations of the ASME,Journal of Tribology,2007,129(2):391-397.
[9]ANDRES L S,BARBARIE V C,BHATTACHARYA A,et al.On the effects of thermal energy transport to the performance of(Semi)floating ring bearing systems for automotive turbochargers[J].Transacations of the ASME,Journal of Engineering for Gas Turbings and Power,2012,134(10):561-570.
[10]SHI F.An analysis for floating bearings in a turbocharger[S].SAE,2011-01-0375,2011.
[11]郭红,张绍林,门日秀,等.涡轮增压器浮环轴承静特性分析[J].润滑与密封,2013,38(11):81-85.GUO Hong,ZHANG Shaolin,MEN Rixiu,et al.Static characteristics analysis of turbocharger floating ring bearing[J].Lubrication Engineering,2013,38(11):81-85.
[12]张浩,师占群,张顺心,等.基于质量守恒边界条件的浮环轴承贫油润滑特性理论分析[J].机械工程学报,2014,50(9):100-107.ZHANG Hao,SHI Zhanqun,ZHANG Shunxin,et al.A theoretical investigation on staved lubricating characteristics of the floating ring bearing based on jacobsson-floberg-olsson boundary condition[J].Journal of Mechanical Engineering,2014,50(9):100-107.
[13]张文静,陈渭,李培,等.系统参数对浮环轴承转速比的动态影响[J].四川大学学报,2015,47(3):160-167.ZHANG Wenjing,CHEN Wei,LI Pei,et al.Dynamic effects of system parameters on speed ratio of floating ring bearing[J].Journal of Sichuan University,2015,47(3):160-167.
[14]郭红,张直明,岑少起,等.径向浮环动静压轴承稳定性研究[J].振动与冲击,2012,31(17):17-21.GUO Hong,ZHANG Zhiming,CEN Shaoqi,et al.Stability of a journal floating ring hybrid bearing[J].Journal of Vibration and Shock,2012,31(17):17-21.
[15]胡辽平,龚金科,贾国海,等.基于耦合分析法的涡轮增压器浮环轴承数值仿真[J].中南大学学报,2013,44(3):992-997.HU Liaoping,GONG Jinke,JIA Guohai,et al.Numerical simulation on floating ring of turbocharger based on coupled analysis method[J].Journal of Central South University,2013,44(3):992-997.
[16]董春伟,杨金福,付忠广,等.浮环厚度变化对浮环轴承稳定性影响的试验研究[J].润滑与密封,2009,34(1):67-70.DONG Chunwei,YANG Jinfu,FU Zhongguang,et al.The effect of stability of floating bearing with the variance of floating ring transformation thickness[J].Lubrication Science,2009,34(1):67-70.
[17]沈那伟,焦映厚,陈照波,等.微型燃气轮机浮环轴承动力学参数影响因素研究[J].振动工程学报,2012,25(6):714-722.SHEN Nawei,JIAO Yinghou,CHEN Zhaobo,et al.Study of impact factor on dynamics parameters of the floating ring bearing for micro gas turbo generator[J].Journal of Vibration Engineering,2012,25(6):714-722.
[18]LIANG Feng,ZHOU Ming,XU Quanyong.Effects of semi-floating ring bearing outer clearance on the subsynchronous oscillation of turbocharger rotor[J].Chinese Journal of Mechanical Engineering,2016,29(6):901-910.
[19]SUN J,DENG M,FU Y H,et al.Thermohydrodynamic lubrication analysis of misaligned plain journal bearing with rough surface[J].Transacations of the ASME,Journal of Tribology,2010,132(1):111-118
[20]SUN J,ZHU X L,ZHANG L,et al.Effect of surface roughness,viscosity-pressure relationship and elastic deformation on lubrication performance of misaligned journal bearings[J].Industrial Lubrication and Tribology,2014,66(3):337-345.
[2]HATAKENAKA K,TANAKA M,SUZUKI K.A theoretical analysis of floating bush journal bearing with axial oil film rupture being considered[J].ASME Journal of Tribology,2002,124(3):494-505.
[3]CHUN S M.A parametric study on bubble lubrication of high-speed journal bearings[J].Tribology International,2002,35(1):1-13.
[4]CHUN S M.Thermohydrodynamic lubrication analysis of high-speed journal bearing considering variable density and variable specific heat[J].Tribology International,2004,37(5):405-413.
[5]CHUN S M.Aeration effects on the performance of a turbocharger journal bearing[J].Tribology International,2008,41(4):296-306.
[6]ANDRES L S,KERTH J.Thermal effects on the performance of floatingring bearings for turbochargers[J].Journal of Engineering Tribology,2004,218-210(5):437-450.
[7]HOLT C,ANDRES L S,SAHAY S,et al.Test response and nonlinear analysis of a turbocharger supported on floating ring bearings[J].Transacations of the ASME,Journal of Tribology,2005,127(2):107-115.
[8]ANDRES L S,GJIKA K G,LARUE G.Rotordynamics of small turbochargers supported on floating ring bearings-highlights in bearing analysis and experimental validation[J].Transacations of the ASME,Journal of Tribology,2007,129(2):391-397.
[9]ANDRES L S,BARBARIE V C,BHATTACHARYA A,et al.On the effects of thermal energy transport to the performance of(Semi)floating ring bearing systems for automotive turbochargers[J].Transacations of the ASME,Journal of Engineering for Gas Turbings and Power,2012,134(10):561-570.
[10]SHI F.An analysis for floating bearings in a turbocharger[S].SAE,2011-01-0375,2011.
[11]郭红,张绍林,门日秀,等.涡轮增压器浮环轴承静特性分析[J].润滑与密封,2013,38(11):81-85.GUO Hong,ZHANG Shaolin,MEN Rixiu,et al.Static characteristics analysis of turbocharger floating ring bearing[J].Lubrication Engineering,2013,38(11):81-85.
[12]张浩,师占群,张顺心,等.基于质量守恒边界条件的浮环轴承贫油润滑特性理论分析[J].机械工程学报,2014,50(9):100-107.ZHANG Hao,SHI Zhanqun,ZHANG Shunxin,et al.A theoretical investigation on staved lubricating characteristics of the floating ring bearing based on jacobsson-floberg-olsson boundary condition[J].Journal of Mechanical Engineering,2014,50(9):100-107.
[13]张文静,陈渭,李培,等.系统参数对浮环轴承转速比的动态影响[J].四川大学学报,2015,47(3):160-167.ZHANG Wenjing,CHEN Wei,LI Pei,et al.Dynamic effects of system parameters on speed ratio of floating ring bearing[J].Journal of Sichuan University,2015,47(3):160-167.
[14]郭红,张直明,岑少起,等.径向浮环动静压轴承稳定性研究[J].振动与冲击,2012,31(17):17-21.GUO Hong,ZHANG Zhiming,CEN Shaoqi,et al.Stability of a journal floating ring hybrid bearing[J].Journal of Vibration and Shock,2012,31(17):17-21.
[15]胡辽平,龚金科,贾国海,等.基于耦合分析法的涡轮增压器浮环轴承数值仿真[J].中南大学学报,2013,44(3):992-997.HU Liaoping,GONG Jinke,JIA Guohai,et al.Numerical simulation on floating ring of turbocharger based on coupled analysis method[J].Journal of Central South University,2013,44(3):992-997.
[16]董春伟,杨金福,付忠广,等.浮环厚度变化对浮环轴承稳定性影响的试验研究[J].润滑与密封,2009,34(1):67-70.DONG Chunwei,YANG Jinfu,FU Zhongguang,et al.The effect of stability of floating bearing with the variance of floating ring transformation thickness[J].Lubrication Science,2009,34(1):67-70.
[17]沈那伟,焦映厚,陈照波,等.微型燃气轮机浮环轴承动力学参数影响因素研究[J].振动工程学报,2012,25(6):714-722.SHEN Nawei,JIAO Yinghou,CHEN Zhaobo,et al.Study of impact factor on dynamics parameters of the floating ring bearing for micro gas turbo generator[J].Journal of Vibration Engineering,2012,25(6):714-722.
[18]LIANG Feng,ZHOU Ming,XU Quanyong.Effects of semi-floating ring bearing outer clearance on the subsynchronous oscillation of turbocharger rotor[J].Chinese Journal of Mechanical Engineering,2016,29(6):901-910.
[19]SUN J,DENG M,FU Y H,et al.Thermohydrodynamic lubrication analysis of misaligned plain journal bearing with rough surface[J].Transacations of the ASME,Journal of Tribology,2010,132(1):111-118
[20]SUN J,ZHU X L,ZHANG L,et al.Effect of surface roughness,viscosity-pressure relationship and elastic deformation on lubrication performance of misaligned journal bearings[J].Industrial Lubrication and Tribology,2014,66(3):337-345.