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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application >A numerical study of the contact and vibration characteristics of a roller bearing with a surface crack
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A numerical study of the contact and vibration characteristics of a roller bearing with a surface crack

机译：带有表面裂纹的滚动轴承的接触和振动特性的数值研究

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摘要

Roller bearings are key parts in different machineries. As one of the major incipient failure models in the bearings, the surface crack will be enlarged to be a large spalling failure. Moreover, the abrupt changes in the contact characteristics caused by the crack zone would produce unacceptable impulses, which can affect the bearing vibrations. Thus, a study of the contact characteristics and vibrations of the bearings including the surface crack could be conducive for the incipient fault monitoring methods. To overcome this issue, a finite element model is proposed to obtain the influences of the depth and slope angle of a surface crack on the contact characteristics in a roller bearing. The relationships between the contact characteristics (contact deformation, width and stiffness) and crack sizes (depth and slope angle) are established. To study the influences of the surface crack sizes on the bearing vibrations, a dynamic model of the roller bearing considering the surface crack is also proposed. An experiment is introduced to verify the proposed method. It seems that the crack depth and slope angle can greatly affect the contact and vibration characteristics of the bearing. This study provides a helpful numerical approach for understanding the contact and vibration characteristics of roller bearings with various surface cracks.
机译：滚动轴承是不同机械中的关键部件。作为轴承中主要的初期破坏模型之一，表面裂纹将扩大为大的剥落破坏。而且，由裂纹区域引起的接触特性的突然变化将产生不可接受的脉冲，这会影响轴承的振动。因此，研究轴承的接触特性和振动，包括表面裂纹，可能有助于早期的故障监测方法。为了克服这个问题，提出了一个有限元模型来获得表面裂纹的深度和倾斜角度对滚动轴承接触特性的影响。建立了接触特性（接触变形，宽度和刚度）与裂纹尺寸（深度和倾斜角）之间的关系。为了研究表面裂纹尺寸对轴承振动的影响，提出了考虑表面裂纹的滚动轴承动力学模型。通过实验验证了该方法的有效性。似乎裂纹深度和倾斜角度会极大地影响轴承的接触和振动特性。该研究为理解具有各种表面裂纹的滚动轴承的接触和振动特性提供了有用的数值方法。

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