Wear and scuffing failures often occur in marine transmission gears due to high friction and flash temperature at the interface between the meshing-teeth. In this paper, a numerical solution procedure was developed for the predictions of transient friction and flash temperature in the marine timing gears during one meshing circle based on the 3D line contact mixed lubrication simulation, which had been verified by comparing the flash temperature with those from Blok’s theory. The effect of machined surface roughness on the mixed lubrication characteristics is studied. The obtained results for several typical gear pairs indicate that gear pair 4–6 exhibits the largest friction and the highest interfacial temperature increase due to severe rough surface asperity contacts, while the polished gear surfaces yield the smallest friction and the lowest interfacial temperature. In addition, the influences of the operating conditions and the gear design parameters on the friction-temperature behaviors are discussed. It is observed that the conditions of heavy load and low rotational velocity usually lead to significantly increased friction and temperature. In the meantime, by optimizing the gear design parameters, such as the modulus and the pressure angle, the performance of interfacial friction and temperature can be significantly improved.

由于啮合齿之间的界面处的高摩擦和闪蒸温度，在船用传动齿轮中经常发生磨损和划伤故障。在本文中，基于 3D 线接触混合润滑模拟，开发了一种数值求解程序，用于预测一个啮合圆期间船用正时齿轮的瞬态摩擦和闪蒸温度，并通过将闪蒸温度与布洛克的理论。研究了加工表面粗糙度对混合润滑特性的影响。获得的几个典型齿轮副的结果表明，由于严重的粗糙表面粗糙接触，齿轮副 4-6 表现出最大的摩擦和最高的界面温升，而抛光齿轮表面产生最小的摩擦和最低的界面温度。此外，还讨论了运行条件和齿轮设计参数对摩擦温度行为的影响。据观察，重载和低转速的条件通常会导致摩擦和温度显着增加。同时，通过优化齿轮设计参数，如模数和压力角，可以显着提高界面摩擦和温度性能。据观察，重载和低转速的条件通常会导致摩擦和温度显着增加。同时，通过优化齿轮设计参数，如模数和压力角，可以显着提高界面摩擦和温度性能。据观察，重载和低转速的条件通常会导致摩擦和温度显着增加。同时，通过优化齿轮设计参数，如模数和压力角，可以显着提高界面摩擦和温度性能。