Abstract：Rolling bearings are widely used in high-speed rotating machinery systems, such as aero-engine rotors, high-speed CNC machine tool spindles and high-speed locomotive wheelset. The mechanical properties and running state of bearings affect the accuracy, reliability, and life of the whole rotor system significantly. When the rotor-bearing system is rotating at high speed, the generated centrifugal forces and gyroscopic moments increase the loads on the bearings, meanwhile, the bearing inner rings expand radially due to the centrifugal force. In addition, with the increase of the running time, the working temperature rises and thermal deformations happen to the rotor, bearings and other parts. Due to the combined effects from the centrifugal force and risen working temperature, the inside geometric position relations of bearings change, which leads to the change of bearing properties such as stiffness, stress and strain. In this paper, considering the effects of radial centrifugal expansion and thermal deformations on the geometric displacement in the bearings, the Jones’ bearing model is updated and a mechanical model for high-speed rolling bearings is proposed, which can predict the contact angles, deformations and loads between rolling elements and bearing rings. The bearing stiffness can be calculated as well. Based on the proposed mechanical model of rolling bearings, the contact loads and contact position in the bearings are investigated under different working conditions, i.e., static loads, dynamic loads and high speeds. Afterwards, the damage mechanism and incipient damage locations of bearings are analyzed on the basis of the fatigue failure theory of materials, which can provide proofs for the damage detection and fault diagnosis of high-speed rolling bearings.
曹宏瑞 何正嘉 訾艳阳. 高速滚动轴承力学特性建模与损伤机理分析[J]. , 2012, 31(19): 134-140.
Cao Hong;rui He Zheng;jia Zi Yan;yang. Mechanical Modeling of High-speed Rolling Bearings and Analysis of Bearing Damage Mechanism. , 2012, 31(19): 134-140.
2012, Vol. 31 
