An oil‐air lubrication system is driven by high‐speed air. Oil is transported to the contact portion in the form of fine oil droplets to form a lubrication film, thereby improving lubrication performance among matching pairs. A test for point contact sliding friction and wear was conducted under oil‐air lubrication conditions. Oil‐phase and pressure distributions near the contact zone were investigated through numerical simulation. This study aims to explore the effect of air velocity on sliding wear characteristics of a point contact. Results show that point contact sliding wear is considerably affected by air supply speed. The lubrication performance between friction pairs is optimal under appropriate air supply speed, which can enable the oil‐air pressure and oil‐phase volume fraction near the point contact area to obtain appropriate values that are useful to the spread of fine oil droplets. This process ensures that the sliding friction coefficient and specific wear rate can be reduced. The friction coefficient decreases to approximately 0.027, and the specific wear rate is 1.06 × 10⁻⁵ mm³/N·m. Under oil‐air lubrication, microfurrows appear on the worn surfaces of materials with the change in air supply speed. The shape of debris is mainly a flake or block with a few long strip abrasives. The wear mechanism is abrasive.

中文翻译：

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供气速度对油气润滑条件下点接触滑动磨损特性的影响

油气润滑系统由高速空气驱动。油以细小油滴的形式输送到接触部分，形成润滑膜，从而改善了匹配对之间的润滑性能。在油气润滑条件下进行了点接触滑动摩擦和磨损测试。通过数值模拟研究了接触区附近的油相和压力分布。这项研究旨在探讨风速对点接触滑动磨损特性的影响。结果表明，点接触滑动磨损受送风速度的影响很大。在适当的空气供应速度下，摩擦副之间的润滑性能最佳，这可以使点接触区域附近的油气压和油相体积分数获得对细小油滴扩散有用的适当值。该过程确保了可减小滑动摩擦系数和比磨损率。摩擦系数降低至约0.027，比磨损率为1.06×10^-5 毫米³ / N·m以下。在油-空气润滑下，随着空气供应速度的变化，细小沟槽会出现在材料的磨损表面上。碎片的形状主要是片状或块状，带有一些长条状磨料。磨损机制是磨料。