织构分布对动压滑动轴承油膜压力的影响
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摘要
以动压滑动轴承为研究对象,根据流体动压润滑原理,建立圆形微凹坑织构化动压滑动轴承油膜数学模型,推导织构化滑动轴承油膜厚度修正公式;结合Reynolds方程有限差分法的求解方法,分析全织构和织构化参数(间距、深度)对动压滑动轴承圆周方向压力分布的影响。结果表明:分布在轴承上的全织构会引起油膜压力的变化;织构位于不同的位置时对圆形微凹坑织构滑动轴承的油膜压力的影响是不同的,对于不同间距和深度的织构,当织构位于升压区时,动压滑动轴承具有较好的润滑、承载性能,而织构位于降压区和全织构时不利于轴承承载。
Taking the hydrodynamic sliding bearing as the object of study,based on the hydrodynamic lubrication principle,the oil film mathematical model of circular micro-dimple textured hydrodynamic sliding bearing was established,and the correction formula of textured hydrodynamic sliding bearing oil film thickness was derived and applied to solve the Reynolds equation by finite difference method.The influence of full texture and texturing parameters( spacing and depth)on the circumferential pressure distribution in the hydrodynamic sliding bearing was analyzed.The results show that the full texture distribution on the bearing will lead to the change of oil film pressure.The influence of the texture at different position on the oil film pressure of circular micro-dimple textured hydrodynamic sliding bearing is different,when the texture is located in the pressure rising zone,the hydrodynamic sliding bearing has a perfect lubrication and bearing capacity,however,the texture at the decompresssion zone of bearing and the full texture of bearing are unfavorable to bearing load.
Taking the hydrodynamic sliding bearing as the object of study,based on the hydrodynamic lubrication principle,the oil film mathematical model of circular micro-dimple textured hydrodynamic sliding bearing was established,and the correction formula of textured hydrodynamic sliding bearing oil film thickness was derived and applied to solve the Reynolds equation by finite difference method.The influence of full texture and texturing parameters( spacing and depth)on the circumferential pressure distribution in the hydrodynamic sliding bearing was analyzed.The results show that the full texture distribution on the bearing will lead to the change of oil film pressure.The influence of the texture at different position on the oil film pressure of circular micro-dimple textured hydrodynamic sliding bearing is different,when the texture is located in the pressure rising zone,the hydrodynamic sliding bearing has a perfect lubrication and bearing capacity,however,the texture at the decompresssion zone of bearing and the full texture of bearing are unfavorable to bearing load.
引文
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[2]ETSION I.Improving tribological performance of mechanical components by laser surface texturing[J].Tribology Letters,2004,17:733-737.
[3]GUALTIERI E,BORGHI A,CALABRI L,et al.Increasing nanohardness and reducing friction of nitride steel by laser surface texturing[J].Tribology International,2009,42:699-705.
[4]李媛,刘小君,张彦,等.面接触条件下织构表面摩擦特性研究[J].机械工程学报,2012,48(19):109-115.LI Y,LIU X J,ZHANG Y,et al.Frictional properties of textured surfaces under plane contact[J].Journal of Mechanical Engineering,2012,48(19):109-115.
[5]尹必峰,钱晏强,汪博文,等.柴油机缸套表面织构协同润滑效应[J].内燃机学报,2014,32(2):178-185.YIN B F,QIAN Y Q,WANG B W,et al.Combined lubrication effectiveness of surface textures on diesel cylinder liners[J].Transactions of CSICE,2014,32(2):178-185.
[6]SINANO G LU C,NAIR F,GOEKSEN E.Effect of micro and macro pits of journal surface on radial pressure distribution of journal bearing[J].Indian Journal of Engineering&Materials Sciences,2008,15(4):300-310.
[7]QIU M F,DELIC D,RAEYMAEKERS B.The effect of textured shape on the load-carrying capacity of gas lubricated parallel slider bearings[J].Tribology Letters,2012,48(3):315-327.
[8]彭龙龙,汪久根,彭娟娟,等.表面织构对油水混合润滑轴承湍流润滑性能的影响[J].润滑与密封,2015,40(11):30-34.PENG L L,WANG J G,PENG J J,et al.Influence of surface texture on turbulent lubrication of journal bearing with oil and water mixture[J].Lubrication Engineering,2015,40(11):30-34.
[9]于海武,王晓雷,孙造,等.圆柱形微凹坑表面织构对流体动压润滑性能的影响[J].南京航天航空大学学报,2010,42(2):209-213.YU H W,WANG X L,SUN Z,et al.Theoretical analysis on hydrodynamic lubrication of cylinder micro-dimple surface texture[J].Journal of Nanjing University of Aeronautics&Astronautics,2010,42(2):209-213.
[10]于海武,邓海顺,黄巍,等.微凹坑相对位置变化对表面减磨性能的影响[J].中国矿业大学学报,2011,40(6):943-948.YU H W,DENG H S,HUANG W,et al.Effect of micro-dimple arrangements on tribological performance of sliding surfaces[J].Journal of China University of Mining&Technology,2011,40(6):943-948.
[11]李建鸿,樊文欣,王跃,等.凹槽型织构化径向轴承的润滑性能[J].润滑与密封,2016,41(5):82-85.LI J H,FAN W X,WANG Y,et al.Lubrication characteristics of groove surface textured journal bearing[J].Lubrication Engineering,2016,41(5):82-85.
[12]罗星,何芝仙.具有半球形凹坑表面的滑动轴承润滑分析[J].长春理工大学学报(自然科学版),2015,38(6):67-71.LUO X,HE Z X.Lubrication analysis on the journal bearing with the semi-spherical pits surface[J].Journal of Changchun University of Science and Technology(Natural Science Edition)2015,38(6):67-71.