【摘要】 为准确分析航空发动机主轴球轴承沟道故障的振动特性，针对简化模型无法考虑保持架打滑及承载后接触角变化等问题，考虑轴承沟道故障区域处接触变形量的改变，建立了球轴承沟道故障动力学模型，并分析了转速、径向游隙对轴承振动响应的影响规律。研究结果表明：高速球轴承故障特征频率受保持架打滑的影响较大；转速增大时，轴承故障特征频率仿真值与理论值间的差值随保持架打滑率的变化而变化，故障特征频率的幅值逐渐降低，故障带来的冲击效应减弱；径向游隙增大时，外沟道故障特征频率的幅值增大，内沟道故障特征频率的幅值减小但边频带数量增多且幅值增大，调制现象更明显。更多还原

【Abstract】 In order to accurately analyze the vibration characteristics of aeroengine main-shaft ball bearing raceway faults, a dynamic model of ball bearing raceway faults is established considering changes in contact deformation at bearing raceway fault zone. This model addresses limitations of simplified models, such as inability to account for cage slip and variations in contact angle under load. The influences of rotational speed and radial clearance on vibration response of the bearings are analyzed. The research results show that the fault characteristic frequency of high-speed ball bearings is greatly affected by cage slip; as the rotational speed increases, the difference between simulated and theoretical values of fault characteristic frequency of the bearings changes with cage slip rate, the amplitude of fault characteristic frequency gradually decreases, and the impact effect caused by faults weakens; when the radial clearance increases, the amplitude of outer raceway fault characteristic frequency increases, the amplitude of inner raceway fault characteristic frequency decreases, but the number and amplitude of sidebands increase, and the modulation phenomenon becomes more pronounced.更多还原