Analysis of skid damage to cylindrical roller bearing of mainshaft of aeroengine

• Published in: Journal of mechanical science and technology Vol. 34; no. 8; pp. 3239 - 3247
• Main Authors: Xie, Xiangyu, Xu, Jin, Luo, Jun
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Mechanical Engineers 01.08.2020; Springer Nature B.V; 대한기계학회
• Subjects: Abrasive wear; Aerospace engines; Aircraft; Aircraft reliability; Bearings; Control; Damage; Dynamical Systems; Electron microscopy; Engineering; Industrial and Production Engineering; Mechanical Engineering; Microscopy; Original Article; Oxidation; Roller bearings; Skidding; Spectrum analysis; Vibration; Wear mechanisms; X-ray spectroscopy; 기계공학; Skid damage; Aeroengine; Cylindrical roller bearing; Wear
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-020-0716-0

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 photo-electron 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.