Analysis of skid damage to cylindrical roller bearing of mainshaft of aeroengine
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DOI 10.1007/s12206-020-0716-0
Journal of Mechanical Science and Technology 34 (8) 2020 Original Article DOI 10.1007/s12206-020-0716-0 Keywords: · Aeroengine · Cylindrical roller bearing · Skid damage · Wear
Correspondence to: Jun Luo [email protected] Jin Xu [email protected]
Citation: Xie, X., Xu, J., Luo, J. (2020). Analysis of skid damage to cylindrical roller bearing of mainshaft of aeroengine. Journal of Mechanical Science and Technology 34 (8) (2020) ?~?. http://doi.org/10.1007/s12206-020-0716-0
Received February 8th, 2020 Revised
May 6th, 2020
Analysis of skid damage to cylindrical roller bearing of mainshaft of aeroengine Xiangyu Xie1, Jin Xu2 and Jun Luo1 1
Guizhou Provincial College-based Engineering Research Center for Materials Protection of Wear and Corrosion, College of Chemistry and Materials Engineering, Guiyang University, Guiyang 550005, China, 2 School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
Abstract
Skid damage to mainshaft bearings on aeroengines severely reduces aircraft reliability. In this study, a batch of cylindrical roller bearings extracted from mainshaft of inservice aeroengines with, skid damage after a certain service period, were collected, and damage features of the bearings were characterized and compared with those of the undamaged bearings and the new ones. Microscopic feature evaluation, elemental analysis as well as the composition distribution of the bearings were conducted using scanning electron microscopy with energy-dispersive X-ray spectroscopy, X-ray diffractometry, X-ray photoelectron spectroscopy, transmission electron microscopy and surface profilometry. Analysis results reveal that skidding itself is a very complex process initiated by the action of different mechanisms, and manifest in different wear types. The damage mechanism of skid damaged bearings was the joint consequence of abrasive wear, oxidation wear and delamination wear. All the aforementioned damage and wear led to severe aircraft failures.
Accepted May 19th, 2020 † Recommended by Editor Chongdu Cho
1. Introduction
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Cylindrical roller bearings have been extensively widely used in the aircraft industry, which is ascribed to their exceptionally low-friction torque characteristics, making them the ideal part for high-speed operations [1]. Aeroengines bear the brunt of high speed, therefore, they must be highly durable and reliable. In addition, roller bearings that can function at the temperatures of over 200 °C and the speeds of more than 2.5 million DN (the product of shaft diameter in mm, and the rotating speed in r/min) are needed in aeroengines [2]. Such extreme working conditions result in the premature failure of cylindrical roller bearings in the mainshaft. In actual practice, damage to a rolling bearing is usually the joint consequence of several mechanisms operating. Notably, it is the complex combination of numerous influencing parameters, making i
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