基于CFD方法的啮合齿轮搅油损失仿真分析  

Simulation Analysis of Meshing Gear Churning Power Loss based on CFD Method

作　　者：沈林 阮登芳[1,2] 涂攀 Shen Lin;Ruan Dengfang;Tu Pan(School of Automotive Engineering,Chongqing University,Chongqing 400044,China;State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学汽车工程学院,重庆400044 [2]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《机械传动》2018年第11期113-116,122,共5页Journal of Mechanical Transmission

摘　　要：齿轮搅油功率损失与其影响因素形成复杂的关系,难以直接用理论方法确定。一对齿轮的搅油由于存在齿轮啮合过程中的泵吸效应,与单齿搅油存在一定的差别,而现有的搅油损失计算公式大多是针对单齿搅油,在试验数据基础上通过量纲分析得到,受试验条件的限制,其应用范围非常有限。采用计算流体动力学(CFD)软件FLUENT对一对啮合齿轮空载时的搅油损失进行仿真并将计算结果与试验结果进行了比对;分析了齿轮旋转方向和传动比对搅油损失的影响,比较了直齿轮与斜齿轮搅油损失的差异。结果表明,仿真结果与试验测试结果接近,所采用仿真方法能较准确地预测啮合齿轮的搅油功率损失;齿轮旋转方向、传动比和螺旋角对齿轮对的搅油功率损失均有较大影响。It is difficult to determine the gear churning power loss directly by theoretical methods because gear churning power loss has a complex relationship with its influencing factors.Because of the pumping effect of gear meshing,there is a certain difference between single gear churning and meshing gears churning.However,the existing formulas for calculating the churning power loss are mostly aimed at single gear churning power loss and its application is very limited.The CFD software FLUENT is used to simulate the gear churning during the no-load of a pair of meshing gears.The calculation results are compared with the experimental results.The influence of gear rotation direction and gear ratio on the gear churning power loss is analyzed.The difference of the oil loss between spur gear and helical gear is also compared.The results show that the simulation results are close to those of the test results and the simulation method can accurately predict the power loss of the gear meshing gear.The gear rotation direction,gear ratio and helix angle have great effects on the churning power loss of the gear pair.

关 键 词：啮合齿轮 搅油损失 流体动力学 试验验证 

分 类 号：TH132.41[机械工程—机械制造及自动化]