水润滑径向轴承是船舶动力推进系统的关键设备，长期在低速、重载、泥沙等恶劣工况下服役，水润滑复合材料径向轴承容易出现异常。针对船舶水润滑轴承磨损机理揭示和设计验证缺乏磨损量在线测试的难题，提出了船舶水润滑线磨损量超声在线测量方法，以水润滑PEEK复合材料径向轴承为试验对象，开展了不同转速、载荷下轴承磨损试验，将水润滑轴承磨损量超声测量结果与电涡流传感器测量结果进行对比和分析。结果表明，在经过不同磨损时间后，超声与电涡流测量结果相对差均小于10%，绝对差均小于20 μm，且测量差随着载荷的升高而降低。验证了磨损超声实时原位测量方法的可行性，为水润滑径向轴承磨损状态监测提供技术支撑。

Water-lubricated radial bearings are critical components in marine propulsion systems, operating continuously under harsh conditions such as low speeds, heavy loads, and silt contamination. Water-lubricated composite radial bearings are prone to malfunctions. To address the challenge of lacking online wear measurement for revealing wear mechanisms and validating designs of marine water-lubricated bearings, an ultrasonic online measurement method for linear wear of marine water-lubricated bearings is proposed. Using water-lubricated PEEK composite radial bearings as test specimens, wear tests were conducted under varying rotational speeds and loads. The ultrasonic measurement results of bearing wear were compared and analyzed against those from eddy current sensors. Results indicate that after varying wear durations, the relative differences between ultrasonic and eddy current measurements were consistently below 10%, with absolute differences under 20 μm. Moreover, measurement discrepancies decreased as load increased. This validates the feasibility of real-time in-situ ultrasonic wear measurement, providing technical support for monitoring the wear status of water-lubricated radial bearings.

湖北省自然科学基金杰出青年项目