表面织构及供油量对润滑性能影响的建模分析

发布时间：2018-01-11 19:07

本文关键词：表面织构及供油量对润滑性能影响的建模分析　出处：《表面技术》2017年06期 　论文类型：期刊论文

【摘要】：目的研究不同供油条件下织构表面的润滑性能。方法首先,建立考虑表面织构的乏油润滑模型,求解修正雷诺方程获得乏油工况下考虑织构表面的润滑油膜厚度以及压力分布。然后,依据求得的润滑油膜厚度判断计算域内各点润滑状态,通过接触压力及油膜厚度分别计算边界润滑、混合润滑以及流体润滑状态下的切应力,并积分求得摩擦力进而得到摩擦系数。结果模拟了供油层厚度为50~500 nm以及充分供油条件下三种织构的润滑行为,获得了不同润滑状态下表面织构的摩擦系数。速度为0.1 m/s时,供油量对接触区油膜厚度的影响较小,不同润滑状态下织构表现出不同的润滑性能。速度为0.2 m/s时,供油层厚度对油膜厚度的影响较大,随着供油层厚度的增大,膜厚明显增加,摩擦系数在供油层厚度为200 nm时最小。结论接触副处于流体润滑状态时,织构表面不具有减摩效果。接触副处于边界润滑状态时,织构表面具有减摩效果,并且织构较密时,摩擦系数较小。接触副处于混合润滑状态时,织构过于稀疏或密集时均不具有减摩效果,但是合理分布的织构具有减摩效果。
[Abstract]:Objective to study the lubricating properties of textured surfaces under different oil supply conditions. The lubricating oil film thickness and pressure distribution on the texture surface are obtained by solving the modified Reynolds equation. Then, the lubricating state of each point in the domain is judged according to the obtained lubricant film thickness. The shear stresses under boundary lubrication, mixed lubrication and fluid lubrication were calculated by contact pressure and oil film thickness respectively. The friction coefficient is obtained by integrating the friction force. Results the lubrication behavior of three kinds of texture is simulated under the condition of the thickness of the oil layer is 50 ~ 500 nm and the sufficient oil supply condition. The friction coefficient of surface texture under different lubrication conditions was obtained. When the velocity was 0.1 m / s, the oil supply had little effect on the thickness of oil film in the contact region. When the velocity is 0.2 m / s, the oil layer thickness has a great influence on the oil film thickness, and with the increase of the oil supply layer thickness, the film thickness increases obviously. The friction coefficient is the smallest when the thickness of the oil supply layer is 200 nm. Conclusion when the contact pair is in the state of fluid lubrication, the texture surface has no antifriction effect, while the contact pair is in the boundary lubrication state. The friction coefficient is smaller when the texture is dense. When the contact pair is in the mixed lubrication state, the texture is too sparse or dense, and it has no antifriction effect. But reasonably distributed texture has antifriction effect.
【作者单位】：北京理工大学;
【基金】：国家自然科学基金(51675046,U1637205)~~
【分类号】：TH117.2
【正文快照】： Received:2017-05-08;Revised:2017-06-02tact area,and the textures exhibited different lubrication performance under different lubrication conditions.At the speed of 0.2m/s,the oil supply thickness had great influence on film thickness,which increased obvi

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