固体颗粒对直齿轮瞬态热弹流润滑的影响  

Influence of solid particles on transient thermal elastohydrodynamic lubrication of spur gears

作　　者：黄兴保 王优强[1] 刘前[1] 董宁[1] 

机构地区：[1]青岛理工大学机械工程学院,山东青岛266033

出　　处：《合肥工业大学学报（自然科学版）》2016年第11期1456-1463,共8页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51175275);青岛市科技计划资助项目(12-1-4-4-(2)-JCH)

摘　　要：文章建立了含有固体颗粒的直齿轮弹流润滑模型,推导了Reynolds方程,考虑了时变效应和热效应,分析了固体颗粒的形状尺寸和速度对油膜压力、膜厚以及温度的影响。结果表明:考虑固体颗粒后,颗粒所在区域的油膜压力变大,膜厚变小;移动的颗粒能够小幅度增大膜厚,但速度过大则膜厚减小;固体颗粒形状越接近球形时,油膜压力增幅变大,膜厚变小,颗粒越扁长时,油膜压力增幅变小,膜厚变大;考虑颗粒后的最小膜厚变小,最大温度升高明显;在颗粒位置处,油膜温度明显升高,静止颗粒引起的温升最小,且随着颗粒速度的增大,颗粒所在区域的最大温升位置右移,整体温度分布也随着颗粒速度的增大而变化。The elastohydrodynamic lubrication model of spur gears containing solid particles was set up. The Reynolds equation considering solid particles was deduced. Taking the time-variant effect and thermal effect into account, the influence of shape size and speed of solid particle on the oil film pressure, film thickness and temperature was investigated. The results show that considering solid particle, the oil film pressure increases and the film thickness decreases in the region where debris settles. Moving particle makes contribution to the increase of film thickness to a small extent, but if the speed of particle is too high, the film thickness may diminish. When the solid particle is more spherical, the oil film pressure increases and the film thickness decreases. When the solid particle is more prolate, the oil film pressure decreases and the film thickness increases. The minimum film thickness decreases and the maximum temperature increases significantly when considering the effect of solid particle. The oil film temperature increases evidently in the region where debris settles. The temperature rise caused by stationary particle is the minimum. The position of maximum temperature rise moves right with the increase of particle speed. The overall temperature distribution also varies with the increase of particle speed.

关 键 词：固体颗粒 直齿轮 弹流润滑 时变效应 热效应 

分 类 号：TH117.2[机械工程—机械设计及理论]