离心力作用下轴承滚道润滑剂流失与定量补油数值模拟
Numerical Simulation of Oil Layer Decay on Bearing Raceway under Centrifugal Force and Quantitative Lubricant Replenishment
高军斌 1杨萍 1栗心明 1高志伟 1郭峰 1Poll Gerhard2
作者信息
- 1. 青岛理工大学机械与汽车工程学院,山东青岛 266520
- 2. 德国莱布尼茨汉诺威大学机械设计与摩擦学研究所,下萨克森州汉诺威30167
- 折叠
摘要
采用自由表面薄膜流动模型,数值模拟了高速轴承壁面润滑剂在离心力作用下的流动过程,并通过外部定量补油对壁面油层厚度和润滑状态进行了调控.结果表明:高速下离心力的作用可使轴承壁面的润滑剂呈现出非线性衰退,使轴承处于乏油润滑状态;与离心力相比,由表面张力引起的润滑剂回填几乎可以忽略,需依靠外部供油对轴承壁面油层进行增补;通过调整供油时间间隔,可实现轴承壁面润滑剂流动的供失平衡;采用多次微量供油,可将壁面油层厚度和接触区润滑状态调控在一定范围内,进而使轴承处于最佳的润滑状态.
Abstract
Using a thin layer free surface flow model,the lubricant flow driven by centrifugal force on a high-speed rolling bearing surface was numerically simulated.The layer thickness and lubrication state can be regulated by an external quantitative lubricant supply.The results show that the lubricant on the bearing surface was nonlinearly decayed under centrifugal force,pushing the contacts into starvation states.The surface tension was insignificant compared with the centrifugal force that the lubricant replenishment induced by surface tension can be ignored.Thus,the lubricant replenishment had to turn to the external lubricant supply.A lubricant loss-feed balance was reached by controlling the lubricant supply interval.The oil layer thickness and hence the contact states could be regulated with minimal amount and multi-time feeding.By this method,an optimal lubrication regime could be reached in rolling bearings.
关键词
油层衰退/离心力/润滑剂补充/滚动轴承Key words
oil layer decay/centrifugal force/lubricant replenishment/rolling bearing引用本文复制引用
基金项目
国家自然科学基金项目(52275196)
山东省高等学校青创科技支持计划项目(2019KJB010)
出版年
2024
NETL
NSTL
万方数据