摘要
考虑轴瓦变形,基于雷诺方程对表面有缺陷的滑动轴承进行理论建模和数值计算,得到相应工况下轴承润滑膜厚度和压力分布,在此基础上研究缺陷的尺寸和位置对轴承承载力的影响。结果表明:不同材料的轴承,其承载力随着材料弹性模量的增加而增加,最终趋于稳定值;缺陷的存在会降低轴承承载力,但随着材料弹性模量的增加,缺陷的影响越来越小;在一定条件下,在轴承中截面上且位于承载区内的缺陷对轴承承载力的影响显著,缺陷尺寸越大,轴承承载力下降越明显;当缺陷位于轴承承载区内沿润滑剂入口方向靠近最小润滑膜厚度的部分区域时,轴承承载力会略微增加。
Considering the deformation of bushing, based on the Reynolds equation, the analytical model of sliding bear- ings with surface defects was set up, and its lubricating film thickness and pressure distribution were obtained by numerical simulation.The influence of the size and location of the defect on the bearing carrying capacity was explored.The results in- dicate that the elastic modulus of bushing material and surface defects have effect on bearing carrying capacity.With the in- creasing of material elastic modulus, the beating carrying capacity is firstly increased gradually and then tends to a stable value ,but the impact of defect become more negligible.The defects locating in bearing middle cross section have the largest influence on bearing carrying capacity. With the increasing of defect size, the beating carrying capacity is decreased more and more obviously.When the defect is located in the area near the position of minimum lubricating film thickness along the lubricant inlet direction,the bearing carrying capacity will increase slightly.
出处
《润滑与密封》
CAS
CSCD
北大核心
2016年第12期86-92,111,共8页
Lubrication Engineering
基金
国家自然科学基金项目(51405265)
清华大学摩擦学国家重点实验室开放基金重点项目(SKLTKF14B12)
湖北省自然科学基金项目(2013CFB223)
三峡大学人才科研启动基金项目(KJ2013B002)
关键词
滑动轴承
表面缺陷
弹性变形
数值模拟
sliding bearing
surface defect
elastic deformation
numerical simulation
