The tribological behavior, i.e. friction coefficient and wear rate, and vibration characteristics of the water-lubricated bearing was investigated. The water-lubricated bearing is made of three different materials, i.e. polyether-ether-ketone (PEEK), polyimide (PI) and nitrile-butadiene rubber (NBR).,The tribological behavior was investigated experimentally on a specially designed test rig. Three vibration sensors were used to record the vibration of the bearing.,The results indicated that the variation of friction coefficient with rotation speed agrees well with the trend of Stribeck curve. The tested friction coefficient of rubber bearing is higher than that of the other two bearings whether it is in the state of mixed-lubrication or hydrodynamic lubrication, and which causing a larger wear rate in rubber bearing. The PEEK bearing exhibits the best tribological properties due to it has smaller friction coefficient and wear rate. However, it can be found that the rubber bearing gives the minimum vibration acceleration, which means that the rubber bearing has the most potential to improve the stability of water-lubricated bearing rotor system.,In this study, a group of experiment studies conducted on a specially designed test rig. The comprehensive performance, including friction coefficient, vibration acceleration and wear rate, of water-lubricated bearing with three different materials, i.e. PEEK, PI and NBR, was compared systematically. The experiment research may offer a reference for the selection of material in water-lubricated bearing in specific operating conditions.,The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-10-2019-0447/

中文翻译：

---

三种不同材料水润滑滑动轴承摩擦学性能的试验研究

研究了水润滑轴承的摩擦学行为，即摩擦系数和磨损率，以及振动特性。水润滑轴承由三种不同的材料制成，即聚醚醚酮 (PEEK)、聚酰亚胺 (PI) 和丁腈橡胶 (NBR)。在专门设计的试验台上对摩擦学行为进行了实验研究。使用三个振动传感器记录轴承的振动情况，结果表明摩擦系数随转速的变化与Stribeck曲线的趋势非常吻合。经测试，橡胶轴承的摩擦系数高于其他两种轴承，无论是混合润滑还是流体动力润滑状态，导致橡胶轴承磨损率较大。由于PEEK轴承具有较小的摩擦系数和磨损率，因此表现出最好的摩擦学性能。然而，可以发现橡胶轴承给出的振动加速度最小，这意味着橡胶轴承最有可能提高水润滑轴承转子系统的稳定性。,在本研究中，一组实验研究了专门设计的试验台。系统比较了PEEK、PI和NBR三种不同材料的水润滑轴承的摩擦系数、振动加速度和磨损率等综合性能。实验研究可为特定工况下水润滑轴承材料的选择提供参考。,本文同行评议历史见：https://publons。