微量第二润滑介质辅助的增强水润滑研究

研究了一种微量第二润滑介质辅助的增强水润滑方案. 在水润滑环境下，测量了丁腈橡胶块-不锈钢环接触入口区短时(10 s)注入微量乳化油(100 μL)时的摩擦力特性. 结果表明：在试验工况下短时注入微量乳化油降低了橡胶块磨损. 低速时，摩擦副处于混合润滑状态，短时注入的乳化油减摩效果明显；速度升高时，短时注入的乳化油使轴承特性系数增加，会引起摩擦力增加. 此外，在水环境下利用线接触光干涉技术揭示了乳化油以离水展着的方式形成承载润滑膜. 研究工作为应对短时恶劣工况下的水润滑失效提供新的思路，为水环境下微量乳化油的辅助润滑调控提供数据支持.

This study investigates a reinforced water lubrication scheme assisted by trace secondary lubricating media. Under water lubrication conditions, the friction characteristics were measured when 100 μL of trace emulsified oil was injected into the contact inlet region of the nitrile rubber block-stainless steel ring friction pair for a short duration of 10 s. The experimental results demonstrate that short-time injection of trace emulsified oil mitigates the wear of the rubber blocks under the tested operating conditions. At low speeds, the friction pair operates in the mixed lubrication regime, and the short-time injected emulsified oil exhibits a significant anti-friction effect; when the speed rises, the short-time injected emulsified oil increases the bearing characteristic coefficient, thereby leading to an increase in friction force. Additionally, line-contact optical interferometry was employed to reveal that the emulsified oil forms a load-bearing lubricating film through a water-separated spreading manner under the water environment. This research provides novel insights for addressing water lubrication failure under short-time severe operating conditions, and supplies data support for the assisted lubrication regulation and control of trace emulsified oil in water environments.