双定子叶片泵滚柱连杆组摩擦副润滑特性分析
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摘要
利用Matlab软件计算得出滚柱连杆组摩擦副作用力及内外滚柱偏转角的变化情况,分析得到作用力及接触应力最大位置,将其作为滚柱连杆组摩擦副润滑分析位置,并采用弹流润滑理论进行分析.研究结果表明:滚柱连杆副的润滑特性随滚柱半径的增大及液压泵转速的升高而变好;滚柱-连杆副的最小油膜厚度和膜厚比随半径差增大而迅速减小,随滚柱半径的增大而缓慢增大;当滚柱半径选取范围为2.5～3.5 mm,半径差取值范围为0.05～0.55mm时,该摩擦副的润滑状态良好;半径差越小,该摩擦副的润滑状态越好,考虑到实现径向间隙补偿,半径差设计范围为0.3～0.5 mm.
The friction pairs force of roller connecting rod group and the variation of internal and external roller deflection angle were calculated by Matlab.The maximum position of force and contact stress was obtained and used as the analysis position of the friction pairs in analysis of elastohydrodynamic lubrication theory.Research results show the lubrication characteristics of the pair become better with the increase of roller radius and hydraulic pump speed.The minimum oil film thickness and film thickness ratio decrease with the increase of radius difference and increase with the increase of roller radius.When the range of roller radius is 2.5～3.5 mm and the range of radius difference is 0.05～0.55 mm,the friction pairs is in good lubrication state,and the smaller the radius difference, the better the lubrication state of friction pairs,but considering the radial clearance compensation,radius difference design range from 0.3 mm to 0.5 mm.
The friction pairs force of roller connecting rod group and the variation of internal and external roller deflection angle were calculated by Matlab.The maximum position of force and contact stress was obtained and used as the analysis position of the friction pairs in analysis of elastohydrodynamic lubrication theory.Research results show the lubrication characteristics of the pair become better with the increase of roller radius and hydraulic pump speed.The minimum oil film thickness and film thickness ratio decrease with the increase of radius difference and increase with the increase of roller radius.When the range of roller radius is 2.5～3.5 mm and the range of radius difference is 0.05～0.55 mm,the friction pairs is in good lubrication state,and the smaller the radius difference, the better the lubrication state of friction pairs,but considering the radial clearance compensation,radius difference design range from 0.3 mm to 0.5 mm.
引文
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[2]闻德生,商旭东,马光磊,等.比例型多泵多速马达传动系统设计与试验[J].农业机械学报,2017,48(9):421-428.
[3]闻德生,刘巧燕,刘忠迅,等.滚柱叶片式双定子多速马达的原理与实验验证[J].吉林大学学报:工学版,2015,45(4):1130-1138.
[4]闻德生,刘忠迅,刘巧燕,等.连杆外滚柱型双定子马达及其密封机理研究[J].华中科技大学学报:自然科学版,2014,42(5):57-60,74.
[5]CHO I S,OH S H,SONG K K,et al.The lubrication characteristics of the vane tip under pressure boundary condition of oil hydraulic vane pump[J].Journal of Mechanical Science and Technology,2006,20(10):1716-1721.
[6]檀润华,苑彩云.弹流理论在单作用叶片泵叶片顶廓设计中的应用[J].河北工学院学报,1991(3):43-50.
[7]王德石,赖生远.流体动压支承高速叶片泵的设计方法[J].大连铁道学院学报,1994(2):69-72.
[8]张国涛,尹延国.基于叶顶曲率半径变化的变量叶片泵叶片-定子副润滑数值分析[J].中国机械工程,2015,26(18):2481-2490.
[9]刘一山,闻德生,杜孝杰.多泵多速马达传动系统简介[J].液压气动与密封,2012(2):73-76.
[10]闻德生,吕世君,刘晓晨,等.等宽双定子泵和马达的原理研究[J].哈尔滨工业大学学报,2008,40(11):1840-1844.
[11]闻德生,隋广东,刘小雪,等.多泵多马达调压系统理论分析与实验[J].农业机械学报,2018,49(11):419-426.
[12]JIN Z M,DOWSON D.Elastohydrodynamic lubrication in biological systems[J].Proc of the Institution of Mechanical Engineers:Journal of Engineering Tribology,2005,219(5):367-380.