基于加载接触分析的航空螺旋锥齿轮油雾润滑性能分析  

Analysis on Vapor/Mist Lubrication of Aerial Spiral Bevel Gears

作　　者：王延忠[1,2] 孙振宇[1] 周元子[1] 李国权[3] 郭梅[3] 吕庆军[4] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191 [2]重庆大学机械传动国家重点实验室,重庆400044 [3]中国北方车辆研究所,北京100072 [4]中航工业沈阳发动机设计研究所,辽宁沈阳110043

出　　处：《润滑与密封》2010年第7期23-27,共5页Lubrication Engineering

基　　金：国家自然科学基金项目(50875009);国防基础科研重点项目(B0620060424);高校博士学科点专项科研基金项目(2007006009);机械传动国家重点实验室开放基金项目(SKLT-KFKT-200813)

摘　　要：航空动力机匣内的润滑油在高速旋转的螺旋锥齿轮带动下,有一部分润滑油将被激荡成油雾状态,螺旋锥齿轮处于复杂的油气二相混合状态下工作。在螺旋锥齿轮加载接触分析基础上,以弹流润滑理论以及二相流体润滑理论作为理论基础,推导油气混和状态下润滑油黏度和密度特性方程,通过数值计算方法,研究润滑油不同含气率下螺旋锥齿轮轮齿表面油膜厚度及压力分布。结果表明,含气率控制在一定范围内增加,可以有效增加油膜厚度,减小压力峰值,从而提高螺旋锥齿轮的接触性能和寿命。Driving by the high-speed rotational spiral bevel gear, part of the lubricating oil in the dynamic receiver of aviation engine will change into oil mist, and the spiral bevel gear works at the incomplete state of oil/mist. Based on the spiral bevel gear contact analysis, the viscosity and density equations of lubricating oil under oil and gas mixed state were deduced with EHL theory and two phase fluid lubrication theory. The film thickness and pressure distributions on spiral bevel gear tooth surface at different gas-rate of lubricating oil were studied by numerical method. The results show that, in a certain range, increasing the gas-rate of lubricating oil can effectively increase the film thickness and decrease the peak pressure, thereby enhancing the contact performance and life of spiral bevel gear.

关 键 词：螺旋锥齿轮 油雾润滑 含气率 油膜厚度 压力分布 

分 类 号：TH117[机械工程—机械设计及理论]