不同密度的微凹椭圆图形的摩擦特性研究

Friction Property for Different Density of Micro-Dimple Ellipse Pattern

采用销-盘摩擦副接触方式,在常温、常压及液体润滑下,对不同密度的微凹椭圆表面图形进行摩擦试验,研究不同接触压力及滑动速度下,微凹椭圆图形密度和沿椭圆轴不同摩擦方向对摩擦性能的影响。利用Stribeck曲线分析在不同试验条件下,不同密度的微凹椭圆图形表面的摩擦特性。结果表明,在不同载荷下微凹痕椭圆图形的减摩效果随速度的增加而增大,且在不同滑动方向上减摩效果具有显著差异,但这种差异会随着微凹椭圆图形密度的增加而降低;随着密度的增加,摩擦因数降低,其原因是密度的增加更容易使摩擦状态从临界润滑状态转变成流体动力润滑状态。

By using pin-disk type friction pairs, under normal temperature, atmospheric pressure and fluid lubrication,the friction experiment of difference density of micro-dimple ellipse surface friction pattern was carried out. On different contact pressure and sliding velocity, the impact of density of micro-dimple ellipse pattern under the different direction of friction on friction property was researched. By using the Stribeck curves under the different test conditions, the friction property of different density of the dimple pattern was analyzed.The results show that the effect of reducing friction of micro-dimple ellipse pattern under different load is increased with the increasing of velocity, and which has significant difference on different sliding direction,but this difference will reduce with the raising of density of the pattern.Alone with the raising of density, the friction coefficient is decreased, the reason of which is that the increasing of density is more easier to make the friction state changes from the critical lubrication to hydrodynamic lubrication state.