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http://dx.doi.org/10.20910/JASE.2022.16.6.35

Stress & Life Evaluation of Cylindrical Roller Bearing for Aircraft Gearbox according to Roller Profile Shape  

Jae-Hyun, Kim (Department of Biosystems Engineering, Seoul National University)
Hyun-Woo, Han (Department of Biosystems Engineering, Seoul National University)
Dongu, Im (Department of Biosystems Engineering, Seoul National University)
Jung-Ho, Park (Department of Biosystems Engineering, Seoul National University)
Su-Chul, Kim (Department of Smart Industrial Machinery, Korean Institute of Machinery & Materials)
Young-Jun, Park (Department of Biosystems Engineering, Seoul National University)
Publication Information
Journal of Aerospace System Engineering / v.16, no.6, 2022 , pp. 35-44 More about this Journal
Abstract
This study aims to evaluate the stress and life of cylindrical roller bearings used in aircraft gearboxes, and to select a roller profile that minimises the contact stress between bearing rollers and raceways. The mounting clearance of four points contact ball bearing was determined, so that cylindrical roller bearings support all radial loads, and the bearing mounting position was determined to maximise the bearing lives. In addition, the static safety factor and dynamic life of bearing were predicted according to ISO 76 & ISO/TS 16281 using the load spectrum determined based on the operating load cases of aircraft gearboxes. Furthermore, the optimal roller profile was selected by analysing the contact stress according to the roller profile shape, and the safety of each roller was evaluated. The results stated that the required safety factor and lifetime were satisfied, and Johns Gohar roller profile was optimal.
Keywords
Aircraft Gearbox; Cylindrical Roller Bearing; Static Load Rating; Dynamic Load Rating; Roller Profile;
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