油槽倾斜对行星轮轴向支承润滑特性的影响
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摘要
构造轴向支承油槽的深度描述函数,引入油槽槽边倾斜角和槽底倾斜角2个槽型控制参数;基于不可压缩Reynolds控制方程,并考虑润滑油的温升,采用有限控制体积法求解流场压力分布,分析油槽槽边倾斜角和槽底倾斜角对润滑特性的影响。结果表明:槽边倾斜角度对润滑特性的影响较复杂,槽边倾斜角度为0°时,润滑油膜的温升较小,可以获得较大的油膜承载力;槽底倾斜角度对油膜承载力、流量和温升的影响较大,但对摩擦功率影响较小;槽底向外径倾斜角度越大,行星轮端面间流量越大,油膜的温升越小,油膜的承载力越大。
The depth description function of the axial support oil groove was constructed,in which two slot type control parameters were introduced,including groove edge dip angle and groove bottom tilt angle of oil grooves.Flow field pressure distribution of the axial support was solved with the finite control volume method based incompressible Reynolds control equation and by considering the lubricating oil temperature rising,and the effect of groove edge dip angle and groove bottom tilt angle of oil grooves on the lubrication properties of the axial support was analyzed.The results show that the influence on the lubrication properties of the axial support is complex by the groove edge dip angle.When groove edge dip angle is 0°,the temperature rise of the lubricating oil film is rather small,and the film can get a larger bearing capacity.Groove edge dip angle has a greater effect on oil film bearing capacity,flow rate and temperature rise,but little effect on the friction power.The more groove bottom tilt angle,the more flow rate is in end faces of planetary gear,therefore the oil film temperature rise is small,the oil film bearing capacity is larger.
The depth description function of the axial support oil groove was constructed,in which two slot type control parameters were introduced,including groove edge dip angle and groove bottom tilt angle of oil grooves.Flow field pressure distribution of the axial support was solved with the finite control volume method based incompressible Reynolds control equation and by considering the lubricating oil temperature rising,and the effect of groove edge dip angle and groove bottom tilt angle of oil grooves on the lubrication properties of the axial support was analyzed.The results show that the influence on the lubrication properties of the axial support is complex by the groove edge dip angle.When groove edge dip angle is 0°,the temperature rise of the lubricating oil film is rather small,and the film can get a larger bearing capacity.Groove edge dip angle has a greater effect on oil film bearing capacity,flow rate and temperature rise,but little effect on the friction power.The more groove bottom tilt angle,the more flow rate is in end faces of planetary gear,therefore the oil film temperature rise is small,the oil film bearing capacity is larger.
引文
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[2]BLAIR S,WINER W O.Tribological characteristics of needle bearings[J].Tribology Series,1989,14:269-276.
[3]KIM D,JACKSON R L,GREEN I.Experimental investigation of thermal and hydrodynamic effects on radially grooved thrust washer bearings[J].Tribology Transactions,2006,49(2):192-201.
[4]杨富春.复式行星排动力特性及其止推垫圈磨损特性研究[D].杭州:浙江大学,2009.
[5]周巨涛.复式行星排行星轮轴向力及其止推垫圈润滑特性研究[D].杭州:浙江大学,2009.
[6]陈雷,周晓军,周巨涛,等.直齿行星排止推垫圈润滑状态的仿真分析[J].机械设计,2011,28(3):65-68.CHEN L,ZHOU X J,ZHOU J T,et al.Simulation analysis of straight tooth planetary thrust washer lubrication state[J].Journal of Machine Design,2011,28(3):65-68.
[7]王宏伟,马彪,赵喜敬,等.高转速行星齿轮止推垫圈流体动压润滑特性[J].排灌机械工程学报,2012,30(1):69-74.WANG H W,MA B,ZHAO X J,et al.Hydrodynamic lubrication characteristics of planet gear thrust washer used in high-speed planetary transmission[J].Journal of Drainage and Irrigation Machinery Engineering,2012,30(1):69-74.
[8]郝木明,庄媛,章大海,等.考虑空化效应的螺旋槽液膜密封特性数值研究[J].中国石油大学学报(自然科学版),2015,39(3):132-137.HAO M,ZHUANG Y,ZHANG D,et al.Numerical study on sealing performance of spiral groove liquid film seal considering effects of cavitation[J].Journal of China University of Petroleum(Edition of Natural Sciences),2015,39(3):132-137.
[9]KIM T H,LEE T W.Design optimization of gas foil thrust bearings for maximum load capacity[C]//ASME Turbo Expo 2015:Turbine Technical Conference and Exposition,2015.
[10]王小燕,孟祥铠,刘鑫,等.核主泵用流体动压型机械密封耦合模型与性能分析[J].摩擦学学报,2013,33(2):169-176.WANG X Y,MENG X K,LIU X,et al.Coupling model and performance analysis of hydrodynamic mechanical seal for reactor coolant pump[J].Tribology,2013,33(2):169-176.
[11]张帆,宋鹏云.机械密封对流换热系数确定方法研究[J].润滑与密封,2013,38(7):51-56.ZHANG F,SONG P Y.Research on determining methods of convective heat transfer coefficients of mechanical seals[J].Lubrication Engineering,2013,38(7):51-56.
[12]石卓,徐国平,陆晓峰,等.机械密封椭圆微孔端面动力润滑性能[J].润滑与密封,2013,38(6):81-85.SHI Z,XU G P,LU X F,et al.Hydrodynamic lubrication of mechanical seal surface with ellipse microdimple[J].Lubrication Engineering,2013,38(6):81-85.
[13]邹龙庆,韩世杰,郭凤,等.变截面旋转流体动压密封油膜厚度的近似计算[J].机床与液压,2013,41(3):77-79.ZOU L Q,HAN S J,GUO F,et al.Approximate computation on oil film thickness of variable cross-section rotating hydrodynamic seal[J].Machine Tool&Hydraulics,2013,41(3):77-79.
[14]EMEL E K,SABIR C.An investigation on the lubrication mechanisms of the mechanical radial face seals:II.hydraulic balance of the ring[J].Industrial Lubrication and Tribology,2007,59(4):166-171.
[15]温诗铸,黄平.摩擦学原理[M].3版.北京:清华大学出版社,2008.
[16]孙大成.润滑力学讲义[M].北京:中国友谊出版公司,1991.