考虑粘度特性的数控静压转台油膜热特性研究
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摘要
液压油粘度是影响静压转台油膜承载力和温升的关键因素之一。为了研究不同粘度特性对扇形油垫油膜热特性的影响规律,基于Fluent软件对比分析了在恒粘度、温-粘特性、压-粘特性以及温-粘和压-粘特性下的油腔压强及油膜温升,并搭建热特性检测系统开展了实验验证。结果表明:同时引入温-粘和压-粘特性的油膜热特性的分析结果更加趋近于工程实际;温-粘效应对油膜热特性的影响大于压-粘效应;当液压油温-粘系数值为3910时,油膜具有相对更高的承载能力和更低的温升。研究结果为静压转台的应用调控、主机厂进行油垫结构设计和液压油选型提供技术指导。
Hydraulic oil viscosity is one of the key factor that affects the oil-film bearing capacity and temperature rise. In order to study the impact of different viscosity effects on oil-film thermal properties, oil cavity pressure and oil-film temperature rise are analyzed under the conditions of constant viscosity, temperature viscosity, pressure viscosity, temperature viscosity and pressure viscosity effects by using Fluent software. And thermal properties detecting system is designed to carry out experimental verification. The results shows that oil-film thermal properties analysis with the temperature viscosity and pressure viscosity effects are more close to engineering practice, the impact of temperature viscosity effect on oil-film thermal properties is greater than that of pressure viscosity effect, the oil-film has relatively higher bearing capacity and lower temperature rise when the hydraulic oil temperature viscosity value is 3 910. The research results will provide reference for application regulation of static pressure turntable, technical guidance for structural design and hydraulic oil selection.
Hydraulic oil viscosity is one of the key factor that affects the oil-film bearing capacity and temperature rise. In order to study the impact of different viscosity effects on oil-film thermal properties, oil cavity pressure and oil-film temperature rise are analyzed under the conditions of constant viscosity, temperature viscosity, pressure viscosity, temperature viscosity and pressure viscosity effects by using Fluent software. And thermal properties detecting system is designed to carry out experimental verification. The results shows that oil-film thermal properties analysis with the temperature viscosity and pressure viscosity effects are more close to engineering practice, the impact of temperature viscosity effect on oil-film thermal properties is greater than that of pressure viscosity effect, the oil-film has relatively higher bearing capacity and lower temperature rise when the hydraulic oil temperature viscosity value is 3 910. The research results will provide reference for application regulation of static pressure turntable, technical guidance for structural design and hydraulic oil selection.
引文
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[2]MARKIN D,MCCARTHY D C,GLAVATSKIH S B.AFEM approach to simulation of tilting-pad thrust bearing assemblies[J].Tribology International,2003,36(11):807-814.
[3]SHARMA S C,KUMARB V,JAINA S C,et al.Study of hole-entry hybrid journal bearing system considering combined influence of thermal and elasticeffects[J].Tribology International,2003,36(12):903-920.
[4]姜宏伟,张亚南,王建梅,等.磁流体油膜轴承油的粘度特性研究[J].太原科技大学学报,2016,37(5):400-405.JIANG Hong-wei,ZHANG Ya-nan,WANG Jian-mei,et al.Research and analysis of viscosity properties for magnetic-fluid-lubrication oil-film bearing oil[J].Journal of Taiyuan University of Science and Technology,2016,37(5):400-405.
[5]刘赵淼,金秋颖,张成印,等.引入温-粘及压-粘关系式的油膜工作性能数值分析[J].计算力学学报,2011,28(4):69-73.LIU Zhao-miao,JIN Qiu-ying,ZHANG Cheng-yin,et al.Numerical analysis of temperature-viscosity and pressure-viscosity characteristics influence on the working performance of oil film[J].Chinese Jounal of Computational Mechanics,2011,28(4):69-73.
[6]赵建华,高殿荣,张作超.液体静压导轨定压供油式油腔承载力的超静定力学模型[J].机械工程学报,2012,48(22):167-176.ZHAO Jian-hua,GAO Dian-rong,ZHANG Zuo-chao.Indeterminate mechanics model of bearing capacity of constant pressure oil pockets in hydrostatics slide[J].Journal of Mechanical Engineering,2012,48(22):167-176.
[7]赵建华.龙门车铣中心液体静压导轨性能的理论分析与实验研究[D].秦皇岛:燕山大学,2013.ZHAO Jian-hua.Theoretical analysis and experimental research of liquid hydrostatic slide’s performance of gantry turning and milling center[D].Qinhuangdao:Yanshan University,2013.
[8]HOGLUND E.Influence of Lubricant properties on elastohydrodynamic lubrication[J].Wear,1991,232(2):176-184.
[9]NAKAHARA T,YAGI K.Influence of temperature distributions in ehl film on its thickness under high slip ratio conditions[J].Tribology International,2007,40(4):632-637.
[10]SANG M C.A parametric study on bubbly lubrication of high-speed journal bearings[J].Tribology International,2002,35(1):1-13.
[11]张亚南,王建梅,张艳娟,等.时间积累效应对油膜轴承油粘度的影响研究[J].太原科技大学学报,2016,37(1):64-67.ZHANG Ya-nan,WANG Jian-mei,ZHANG Yan-juan,et al.Influence of time-acculumation effect on viscosity performance for oil-film bearing oil[J].Journal of Taiyuan University of Science and Technology,2016,37(1):64-67.
[12]陈东菊,周帅,边艳华,等.液体静压主轴油膜滑移现象的分析及试验研究[J].机械工程学报,2016,52(5):144-153.CHEN Dong-ju,ZHOU Shuai,BIAN Yan-hua,et al,Analysis and experimental research of hydrostatic spindle oil film slip phenomenon[J].Journal of Mechanical Engineering,2016,52(5):144-153.
[13]陈瑶.润滑油物性对静压支承油膜性能影响研究[D].哈尔滨:哈尔滨工业大学,2015.CHEN Yao.Research on influence of Lubrication oil physical property on performance of hydrostatic supporting oil-film[D].Harbin:Harbin University of Science and Technology,2015.