This paper investigated the effect of oil‐air lubrication on contact temperature and sliding tribological properties. On the basis of heat transfer theory, a numerical simulation model of forced convection was established. Experiments were conducted using the tribology machine. Results show that in oil‐air lubrication, forced convection can significantly reduce the temperature at the contact position. Nonlinear decline and decrease in the descent rate of contact temperature were observed with the increase in convective heat transfer coefficient. The convective heat transfer between friction pairs increased with air supply velocity, whereas the sliding friction coefficient initially decreased and then increased. The friction flash temperature reached its lowest value with proper heat dissipation capacity. With the increase in ambient temperatures of the friction pairs, the sliding friction coefficient decreased, whereas the friction flash temperature increased. Influenced by the oil‐air lubrication heat dissipation in the test, the wear mechanism of point contact sliding friction was abrasive wear.

中文翻译：

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油气润滑对接触温度和滑动摩擦性能的影响

本文研究了油气润滑对接触温度和滑动摩擦性能的影响。基于传热理论，建立了强迫对流的数值模拟模型。使用摩擦学机器进行实验。结果表明，在油气润滑中，强制对流可显着降低接触位置的温度。随着对流传热系数的增加，观察到了接触温度下降的非线性下降和下降。摩擦副之间的对流换热随着供气速度的增加而增加，而滑动摩擦系数先降低后增加。摩擦闪光温度达到最低值并具有适当的散热能力。随着摩擦副的环境温度的升高，滑动摩擦系数降低，而摩擦闪光温度升高。在试验中受油气润滑散热的影响，点接触滑动摩擦的磨损机理为磨料磨损。