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利用自行开发的微型面接触润滑油膜测量系统,研究了固液润湿性对流体动压润滑油膜厚度的影响.试验中以静止的微型滑块平面和旋转的光学透明圆盘平面形成润滑副.固液的润湿性通过接触角判定,不同材料的微滑块平面和润滑液体形成不同的界面.在保持载荷和面接触楔形角不变的条件下对油膜厚度-速度关系进行了测量.结果表明:对于固液润湿性强的界面,形成的油膜厚度与经典润滑理论有较好的一致性;当固液润湿性明显降低时,测量得到的油膜厚度减小.对于试验中观察到的界面效应,应用界面滑移理论进行了初步分析.
The influence of solid-liquid wettability on the film thickness of hydrodynamic lubricating oil film was studied by using the self-developed micro-surface contact lubricant film measuring system, in which lubricated pairs were formed by the stationary micro-slider plane and the rotating optically transparent disk plane. The wettability of the solid-liquid was judged by the contact angle, and different materials of the micro-slider plane and the lubricating liquid form different interfaces. The thickness-velocity relationship of the oil film was measured under the condition of keeping the load and the contact wedge angle constant. The results show that the thickness of the oil film formed by the solid-liquid wetting interface is in good agreement with the classical lubrication theory, and the thickness of the measured oil film decreases when the wetting property of the liquid is obviously decreased. The interface effect is analyzed based on interface slip theory.