Atypical failure mechanism of aero-engine main shaft roller bearing

被引：0
|
作者：
Zheng J. [1 ]
Deng S. [1 ,2 ,3 ]
Zhang W. [1 ]
Dang X. [4 ]
机构：
[1] School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang
[2] National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang
[3] Collaborative Innovation Center of Major Machine Manufacturing in Liaoning, Dalian
[4] Beijing Power Machinery Institute, Beijing
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2020年 / 41卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Atypical failure; Collision; Cylindrical roller bearing; Dynamic unbalance; Dynamics;
D O I：
10.7527/S1000-6893.2019.23347
中图分类号：
学科分类号：
摘要：
Based on the dynamic analysis of rolling bearings, this paper presents dynamics differential equations of high-speed cylindrical roller bearing, considering the roller dynamic unbalance and the collision and friction between the roller and the rib, aiming at the atypical failure of aero-engine cylindrical roller bearing.The problem is solved by the GSTIFF (Gear stiff) integer algorithm with variable step. And the influence of the bearing condition parameters and the structural parameters on the maximum skew angle of the dynamic unbalanced roller and maximum collision force between the roller and the rib are analyzed. The results show that the maximum skew angle of the roller and the maximum collision force between the roller and the rib increase with the roller dynamic unbalance and the inner ring rotation speed, showing no obvious correlation with the radial load. The smaller axial clearance can effectively suppress the roller skew, but it will increase the impact force between the roller and the rib. And a reasonable axial clearance range makes the collision force between the roller and the rib small when the roller skew angle is not excessive. The smaller cage pocket circumferential clearance and the rib negative back angle and the larger roller ball end face radius can reduce the maximum skew angle of the roller and the maximum collision force between the roller and the rib. © 2020, Press of Chinese Journal of Aeronautics. All right reserved.
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