计及浮环变形的发动机增压器浮环轴承润滑分析
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摘要
以涡轮增压器浮环轴承为研究对象,考虑了浮环热弹变形,基于浮环平衡方程,建立了浮环流体润滑计算模型.主要分析了不同工况下热变形和弹性变形对浮环轴承润滑性能的影响规律.计算中采用有限差分法求解Reynolds方程进行润滑分析,采用变形矩阵法计算轴承表面弹性变形.结果表明:浮环表面热变形对浮环润滑特性影响显著;轴负荷越小,浮环工作温度越高,浮环热变形量越大;浮环热变形对内、外膜端泄流量的影响程度和转速有直接联系,转速越高,热变形对内、外膜端泄流量的影响越大;内膜间隙越小,浮环热变形对润滑性能影响程度越大;与浮环热变形相比,浮环弹性变形对浮环润滑性能基本没有影响.
Aiming at floating ring bearing and based on floating ring balance equation,a lubrication model of floating ring bearing was established by taking into consideration of the floating ring deformation.The influence of elastic and thermal deformations of the floating ring on the lubrication performance was discussed.Lubrication of the bearing was analyzed based on the Reynolds equation and elastic deformation of the floating ring surface was calculated by deformation matrix method.Results show that thermal deformation of the floating ring has a great influence on the lubrication of the floating ring.Small load corresponds to high thermal deformation.Thermal deformation on the inner and outer film end leakage flow-rate have the relationship with rotational speed.Higher speed corresponds to high thermal deformation on the inner and outer film end leakage flow-rate and end leakage heat dissipation.Small inner film clearance has higher floating ring temperature.Thermal deformation of the floating ring has a remarkable influence when the radial clearance ratio is small.Elastic deformation of the floating ring has little influence on the lubrication performance of floating ring bearing.
Aiming at floating ring bearing and based on floating ring balance equation,a lubrication model of floating ring bearing was established by taking into consideration of the floating ring deformation.The influence of elastic and thermal deformations of the floating ring on the lubrication performance was discussed.Lubrication of the bearing was analyzed based on the Reynolds equation and elastic deformation of the floating ring surface was calculated by deformation matrix method.Results show that thermal deformation of the floating ring has a great influence on the lubrication of the floating ring.Small load corresponds to high thermal deformation.Thermal deformation on the inner and outer film end leakage flow-rate have the relationship with rotational speed.Higher speed corresponds to high thermal deformation on the inner and outer film end leakage flow-rate and end leakage heat dissipation.Small inner film clearance has higher floating ring temperature.Thermal deformation of the floating ring has a remarkable influence when the radial clearance ratio is small.Elastic deformation of the floating ring has little influence on the lubrication performance of floating ring bearing.
引文
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[13]宋寅,李雪松,顾春伟.考虑油孔旋转的浮环轴承的负荷流量特性研究[J].工程热物理学报,2010,31(6):951-954.
[14]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.
[15]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.
[16]Sun J,Deng M,Fu Y H,et al.Thermohydrodynamic lubrication analysis of misaligned plain journal bearing with rough surface[J].ASME Journal of Tribology,2010,132(1):111-118.
[2]Tanaka M,Hori Y.Stability characteristics of floating bush bearing[J].ASME Journal of Lubrication Technology,1972,94(3):248-259.
[3]Rohde S M,Ezzat H A.Analysis of dynamically loaded floating-ring bearings for automotive applications[J].ASME Journal of Lubrication Technology,1980,102(3):271-277.
[4]Trippett R J,Li D F.High-speed floating ring bearing test and analysis[J].ASLE Transactions,1987,27(1):73-81.
[5]Trippett R J.Measured and predicted friction in floating ring bearings[C]//SAE Paper.Detroit,MI,USA,1986,860075.
[6]Clarke D M,Fall C,Hayden G N,et al.A steady-state model of a floating ring bearing,including thermal effects[J].ASME Journal of Tribology,1992,114(1):141-149.
[7]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.
[8]Andres L S,Kerth J.Thermal effects on the performance of floating ring bearings for turbochargers[J].Journal of Engineering Tribology,2004,218(5):437-450.
[9]Holt C,Andres L S,Sahay S,et al.Test response and nonlinear analysis of a turbocharger supported on floating ring bearings[J].ASME Journal of Tribology,2005,127(2):107-115.
[10]Andres L S,Gjika K G,Larue G.Rotordynamics of small turbochargers supported on floating ring bearingshighlights in bearing analysis and experimental validation[J].ASME Journal of Tribology,2007,129(2):391-397.
[11]魏立队,段树林,邢辉,等.船舶柴油机主轴承热弹性流体动力混合润滑分析[J].内燃机学报,2013,31(2),183-191.
[12]杨金福,陈策,袁平,等.浮环轴承非线性耦合动力润滑特性[J].航空动力学报,2009,24(2):365-370.
[13]宋寅,李雪松,顾春伟.考虑油孔旋转的浮环轴承的负荷流量特性研究[J].工程热物理学报,2010,31(6):951-954.
[14]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.
[15]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.
[16]Sun J,Deng M,Fu Y H,et al.Thermohydrodynamic lubrication analysis of misaligned plain journal bearing with rough surface[J].ASME Journal of Tribology,2010,132(1):111-118.