微织构尺寸对轴承摩擦磨损性能的影响

Effect of Micro-Texture Size on Friction and Wear Performance of Journal Bearing

为了研究微织构尺寸对滑动轴承摩擦磨损性能的影响,基于滑动轴承摩擦磨损理论模型及摩擦磨损试验,通过设计不同的微织构尺寸,研究了滑动轴承的摩擦磨损性能随微织构尺寸的变化规律.结果表明:在摩擦磨损理论模型中,随着微织构尺寸的增加,滑动轴承润滑性能呈先提高后降低趋势,在无量纲微织构半径是√2时轴承具有最优的润滑性能;微织构的磨损性能随着微织构深度的增加大致呈先降低后升高趋势,在无量纲深度为0.03时,滑动轴承磨损性能最优;微织构尺寸半径是√4和√5时,磨损量相对较小.在摩擦试验中,微织构半径是0.17 mm时润滑性能最优,平均摩擦系数相比微织构半径为0.1 mm时降低了7.1%,同时表面形貌磨损明显小于其他尺寸时的试件.理论和试验均表明,合适的微织构尺寸可以有效提高滑动轴承的润滑性能、降低摩擦系数及减小磨损.

In order to study the effect of micro-texture size on the friction and wear characteristics of journal bearing,using the theoretical model of friction and wear of journal bearing and the method of friction experiments,the rule of friction and wear performance with different micro-texture sizes was analyzed.The results showed that with the increase of micro-texture size,the lubrication performance of the journal bearing increased firstly and then decreased in the theoretical model of friction and wear.The optimal lubrication performance occurred at the dimensionless radius of √2 With the increase of micro-texture depth,the wear performance of the journal bearing decreased firstly and then increased.When the dimensionless depth was 0.03,the journal bearing had the best wear performance.When the micro-texture radius was √4 and √5,the wear was low.In the friction experiment,the lubricating performance was the best as the micro-texture radius was 0.17 mm,and the average friction coefficient was 7.1% lower than that for the micro-texture radius of 0.1 mm.And the surface morphology wear was significantly smaller than other sizes pieces.Both theory and experiment proved that proper micro-texture size improved effectively the lubrication performance,reduced the friction coefficient and the wear of journal bearings.