齿轮传动旋转流场对喷油射流甩离的影响
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摘要
针对啮入侧喷油方式,运用计算流体动力学(CFD)方法,建立了高速旋转流场中喷油射流模型。通过仿真计算发现高速流场对射流具有甩离效应,当对啮合齿轮进行喷油时,射流具有向小轮方向甩离的趋势,其甩离程度随着转速和模数增加而增大;滑油的出口速度越大,抵抗旋转流场甩离效应的能力越强。通过理论分析深入揭示了旋转流场对射流甩离效应的成因机理。最后,通过搭建射流甩离相似试验台,验证了分析结论。
Simulation was carried out to study the influence of gear transmission high-speed flow filed on the deviation effect of spray jet.Simulation results show that the high-speed flow field has a deviation effect on the jet.When the pair of gears was sprayed,the jet has a tendency to deflect to the small gear,and the deviation effect increases with the speed and modulus.The ability to resist the deviation effect increases with the outlet velocity of the lubrication oil.By theoretical analysis,the origin mechanism of the deviation effect was revealed deeply.The conclusion of the analysis was verified by experiments.
Simulation was carried out to study the influence of gear transmission high-speed flow filed on the deviation effect of spray jet.Simulation results show that the high-speed flow field has a deviation effect on the jet.When the pair of gears was sprayed,the jet has a tendency to deflect to the small gear,and the deviation effect increases with the speed and modulus.The ability to resist the deviation effect increases with the outlet velocity of the lubrication oil.By theoretical analysis,the origin mechanism of the deviation effect was revealed deeply.The conclusion of the analysis was verified by experiments.
引文
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[22]Mehdizadeh A,Sherif S A,Lear W E.Numerical simulation of thermofluid characteristics of two-phase slug flow in microchannels[J].Int J Heat Mass Transfer,2011,54(15/16):3457-3465.
[2]Zhu D,Cheng H S.An analysis and computational procedure for EHL film thickness,friction and flash temperature in line and point contacts[J].Tribology Transactions,1989,32(3):364-370.
[3]Seetharaman S,Kahraman A.A windage power loss model for spur gear pairs[J].Tribology Transactions,2010,53(4):473-484.
[4]Simon V.Influence of machine tool setting parameters on EHD lubrication in hypoid gears[J].Mechanism and Machine Theory,2009,44(5):923-937.
[5]H9hn B R,Michaelis K,Otto H P.Minimised gear lubrication by a minimum oil/air flow rate[J].Wear,2009,266(3-4):461-467.
[6]林基恕,张振波.21世纪航空发动机动力传输系统的展望[J].航空动力学报,2001,16(2):108-114.Lin Ji-shu,Zhang Zhen-bo.Prospects of aero-engine powertransmission system in the 21st century[J].Journal of Aerospace Power,2001,16(2):108-114.
[7]Xue J,Li W,Qin C.The scuffing load capacity of involute spur gear systems based on dynamic loads and transient thermal elastohydrodynamic lubrication[J].Tribology International,2014,79:74-83.
[8]Evans H P,Snidle R W,Sharif K J.Deterministic mixed lubrication modelling using roughness measurements in gear applications[J].Tribology International,2009,42(10):1406-1417.
[9]Akin L S,Mross J J,Townsend D P.Study of lubricant jet flow phenomena in spur gears[J].Journal of Tribology,1975,97(2):283-288.
[10]Massini D,Fondelli T,Facchini B,et al.High speed visualizations of oil jet lubrication for aero-engine gearboxes[J].Energy Procedia,2016,101:1248-1255.
[11]Townsend D P,Akin L S.Study of lubricant jet flow phenomena in spur gears-out of mesh condition[J].Journal of Mechanical Design,1978,100(1):61-68.
[12]Fondelli T,Andreini A,Da Soghe R,et al.Numerical simulation of oil jet lubrication for high speed gears[J].International Journal of Aerospace Engineering,2015:752457.
[13]Akin L S,Townsend D P.Into mesh lubrication of spur gears with arbitrary offset oil jet.part 2:for jet velocities equal to or greater than gear velocity[J].Journal of Mechanical Design,1983,105(4):719-724.
[14]Diab Y,Ville F,Changenet C,et al.Windage losses in high speed gears:Preliminary experimental and theoretical results[C]∥ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference,American Society of Mechanical Engineers,2003:941-947.
[15]王延忠,牛文韬,唐文,等.喷油方位参数对航空直齿轮喷油润滑过程的影响分析[J].航空动力学报,2015,30(7):1605-1610.Wang Yan-zhong,Niu Wen-tao,Tang Wen,et al.Influence of spray orientation parameters on spray lubrication process of aero spur gears[J].Journal of Aerospace Power,2015,30(7):1605-1610.
[16]Pallas S,Marchesse Y,Changenet C,et al.Application and validation of a simplified numerical approach for the estimation of windage power losses in spur gears[J].Computers and Fluids,2013,84:39-45.
[17]Voeltzel N,Marchesse Y,Changenet C,et al.Preliminary numerical investigations on windage power losses generated by helical gears[C]∥International Gear Conference,Lyon,France,2014:1141-1149.
[18]王延忠,牛文韬,唐文,等.喷油嘴喷射方向偏离的影响因素[J].航空动力学报,2012,27(7):1665-1670.Wang Yan-zhong,Niu Wen-tao,Tang Wen,et al.Research on deflection of nozzle spray direction[J].Journal of Aerospace Power,2012,27(7):1665-1670.
[19]Hill M J,Kunz R F,Medvitz R B,et al.CFD analysis of gear windage losses:validation and parametric aerodynamic studies[J].Journal of Fluids Engineering,2011,133(3):031103.
[20]Marchesse Y,Voeltzel N,Changenet C,et al.Investigations on CFD simulation for predicting windage power losses generated by helical gears[C]∥STLE Annual Meeting and Exhibition,Orlando,Florida,USA,2014.
[21]Arisawa H,Nishimura M,Imai H,et al.Computational fluid dynamics simulations and experiments for reduction of oil churning loss and windage loss in aeroengine transmission gears[J].Journal of Engineering for Gas Turbines and Power,2014,136(9):092604.
[22]Mehdizadeh A,Sherif S A,Lear W E.Numerical simulation of thermofluid characteristics of two-phase slug flow in microchannels[J].Int J Heat Mass Transfer,2011,54(15/16):3457-3465.