【摘要】 为了揭示表面粗糙度对船舶水润滑高分子材料轴承润滑性能的影响规律，开展水润滑轴承弹流混合润滑理论研究；建立考虑内衬材料粗糙度和弹性变形的水润滑轴承混合润滑模型，并对模型进行仿真验证；分析内衬粗糙峰对水膜厚度、水膜压力分布和承载能力的影响规律。研究结果表明：在转速增大的过程中，内衬粗糙度的增大会减缓水膜厚度的增幅比，使轴承需要更高的转速来进入流体动压润滑状态；减小轴承内衬粗糙度能有效降低轴承起飞转速，加快轴承由混合润滑转变为流体动压润滑的过程，减小轴承与轴颈的局部接触，降低轴承异常振动噪声发生的可能性。研究结果揭示了内衬粗糙度变化对轴承润滑特性的影响机制，为水润滑轴承的优化设计提供理论参考。更多还原

【Abstract】 In order to reveal the effect of surface roughness on the lubrication performance of marine water lubricated polymer bearings, theoretical research on elastohydrodynamic lubrication of water lubricated bearings was conducted.A hybrid lubrication model of water lubricated bearing considering the roughness and elastic deformation of lining material was established and verified by simulation.The influence of inner liner roughness peak on water film thickness, water film pressure distribution and bearing capacity was analyzed.The results show that the increase of liner roughness will slow down the increase ratio of water film thickness during the increase of rotating speed, so that the bearing needs higher rotating speed to enter the hydrodynamic lubrication state.Reducing the roughness of the bearing lining can effectively reduce the take-off speed of the bearing, accelerate the process of the bearing from mixed lubrication to hydrodynamic lubrication, reduce the local contact between the bearing and the journal, and reduce the possibility of abnormal vibration and noise of the bearing.This research reveals the mechanism of the influence of the change of the inner liner roughness on the lubrication characteristics of the bearing, and provides a theoretical reference for the optimal design of the water lubricated bearing.更多还原