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Wear monitoring method of water-lubricated polymer thrust bearing based on ultrasonic reflection coefficient amplitude spectrum

引用

Friction 2023年第5期11卷 685-703页

作者： Changxiong NING Fei HU Wu OUYANG Xinpin YAN Dongling XU School of Naval Architecture Ocean and Energy Power EngineeringWuhan University of TechnologyWuhan 430063China School of Transportation and Logistics Engineering Wuhan University of TechnologyWuhan 430063China Reliability Engineering Institute National Engineering Research Center for Water Transport SafetyWuhan 430063China Alliance Manchester Business School The University of ManchesterManchester M156PBUK

The water-lubricated thrust bearings of the marine rim-driven thruster(RDT)are usually composed of polymer composites,which are prone to serious wear under harsh working *** is an excellent non-destructive monitoring technology,but polymer materials are characterized by viscoelasticity,heterogeneity,and large acoustic attenuation,making it challenging to extract ultrasonic echo ***,this paper proposes a wear monitoring method based on the amplitude spectrum of the ultrasonic reflection *** effects of bearing parameters,objective function,and algorithm parameters on the identification results are simulated and *** the correlation coefficient and root mean square error as the matching parameters,the thickness,sound velocity,density,and attenuation factor of the bearing are inversed simultaneously by utilizing the differential evolution algorithm(DEA),and the wear measurement system is *** order to verify the identification accuracy of this method,an accelerated wear test under heavy load was executed on a multi-functional vertical water lubrication test rig with poly-ether-etherketone(PEEK)fixed pad and stainless-steel thrust collar as the *** thickness of pad was measured using the high-precision spiral micrometer and ultrasonic testing system,***,the results demonstrate that the thickness identification error of this method is approximately 1%,and in-situ monitoring ability will be realized in the future,which is of great significance to the life prediction of bearings.

关键词： water-lubricated polymer thrust bearings wear monitoring ultrasonic reflection coefficient amplitude spectrum parameter inversion differential evolution

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