摘要
利用摩擦学、传热学、赫兹接触等理论,给出了轮齿不同啮合位置的摩擦热流密度以及轮齿端面、轮齿齿面等区域的对流换热系数的计算方法,建立了轮齿本体温度场有限元分析模型,获得了齿轮轮齿稳态温度场,在稳态热分析的基础上,采用有限元法进行瞬态热分析,得到了啮合过程中轮齿齿面瞬态温度场分布,并考虑润滑油粘度、齿宽、载荷和转速对瞬态温度场的影响。研究结果表明:乏油瞬时最大温度出现在齿根附近;润滑油动力粘度对乏油润滑瞬态温度场影响不大;减小齿宽不能降低乏油瞬态温度;载荷和转速对乏油瞬态温度场影响较大。
This paper applies the theories of tribology, Hertz contact and heat transfer for spur gears under starved lubrication to give out,the method of calculating heat transfer coefficient of gear end face and teeth surface and heat flux at different positions of en- gagement, establishes 3-D finite element models of gear teeth and obtains the predict steady state temperature field. Based on the results of transient thermal analysis, distribution of transient temperature field is investigated by using finite element method. The influ- ence of the lubricant viscosity, tooth width, load and speed on the transient temperature field is regarded. The following conclusions can be drawn that： the maximum transient temperature can be presented in the vicinity of the tooth root under starved lubrication; lu- bricant dynamic viscosity has little effect on the starved lubrication transient temperature field and the tooth width can not reduce the transient temperature for lack of oil; load and speed have a greater impact on the starved lubrication transient temperature field.
出处
《机械制造与自动化》
2013年第5期40-43,共4页
Machine Building & Automation
基金
国家自然科学基金(50775108)
高等学校博士学科点专项科研基金资助课题(20113218110017)
南京航空航天大学直升机专项基金(NP2011025)
关键词
乏油润滑
直齿轮
热流密度
对流换热系数
瞬态温度场
starved lubrication
spur gears
heat flux
heat transfer coefficient
transient temperature field
