轴承-轴承座系统振动特征与局部故障尺寸的关联

轴承-轴承座系统振动特征与局部故障尺寸的关联关系是轴承内部故障精确定量诊断的重要依据。针对不同尺寸局部故障诱发的轴承-轴承座系统振动特征的问题,采用显示动力学有限元算法,综合考虑其各部件的弹性变形、重力和轴承元件之间的接触与摩擦的影响,建立含局部故障的轴承-轴承座系统有限元动力学模型,研究不同尺寸局部故障诱发的轴承-轴承座系统的振动特征。分析局部故障尺寸变化对其振动特征的影响规律,揭示局部故障尺寸与轴承-轴承座系统振动特征之间关联关系,为获取其准确的振动特征提供了一种可行的手段,也为轴承-轴承座系统内部轴承早期局部故障的准确定量诊断提供了有效参考。

Relationship Between Vibrations of Bearing-Housing System and Localized Fault Sizes

The relationship between the localized fault sizes and the vibrations of the bearing-housing system is an important parameter for the accurate diagnosis of the bearing faults. To study the influences of the fault sizes on the system vibrations, a dynamic finite element model for a bearing-housing system with a localized fault is proposed. It can consider the deformations and gravity of the system components, as well as the contacts and frictions between the mating components of the bearing. Vibration characteristics of the system caused by the fault with different sizes are studied. The relationship between the fault sizes and system vibrations are obtained. The results can provide a method for predicting the vibration characteristics of the system. It seems that this work also can provide some useful foundations for the accurate fault defection and diagnosis of the bearing-housing system.