A complete dynamics model of defective bearings considering the three-dimensional defect area and the spherical cage pocket
A complete dynamics model of defective bearings considering the three-dimensional defect area and the spherical cage pocket
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DOI：
10.1016/j.ymssp.2022.109743
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发表时间：
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影响因子：
8.4
通讯作者：
Yunchuan Jiang;Wentao Huang;Weijie Wang;Gaoliang Peng
中科院分区：
文献类型：
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作者：
Yunchuan Jiang;Wentao Huang;Weijie Wang;Gaoliang Peng
在目前的故障轴承动力学研究中，滚动轴承的集中参数模型被广泛采用，它是由弹簧和阻尼器连接的刚性质量组成的简化轴承振动模型，不是完整的轴承动力学模型。本文在Gupta轴承动力学模型的基础上，建立了完整的故障轴承动力学模型。该动力学模型包括轴承中各部件的平移和旋转运动，充分考虑了各部件之间的接触和摩擦力，特别是保持架由滚动体引导时滚动体与保持架球窝之间的相互作用。与集中参数模型需要预先规划滚动体在缺陷区域的运动路径不同，动力学模型可以根据滚动体与缺陷区域之间的三维几何关系和力学机理直接求解运动路径。动力学模型模拟的故障轴承振动响应在时域、频域和时频域上与实测振动响应吻合较好，且故障轴承的振动响应存在双脉冲现象，且动力学模型求解的动态变化的罐笼转速平均值与理论计算一致，验证了模型的准确性。研究了滚道缺陷对保持架运动状态的影响，并结合保持架涡动瞬时角速度和保持架回转角速度给出了保持架稳定性指标，对保持架稳定性指标进行了量化分析。分析结果表明，内沟道缺陷轴承保持架稳定性比外沟道缺陷轴承差，且缺陷区域几何形状的变化对保持架稳定性的影响没有明显的规律性。
In current studies of dynamics of the defective bearing, the lumped-parameter model of the rolling element bearing is widely used, which is a simplified bearing vibration model consisting of the rigid masses connected by springs and dampers and is not a complete bearing dynamics model. In this paper, based on Gupta's bearing dynamics model, a complete dynamics model of the defective bearing is developed. The dynamics model includes the translational and rotational motion of all components in the bearing and fully considers the contact and friction forces between each component, especially the interaction between the rolling element and spherical pocket of the cage when the cage is guided by the rolling element. Different from the lumped-parameter model which needs to pre-plan the motion path of the rolling element in the defect area, the dynamics model can solve the motion path directly based on the three-dimensional geometric relationship and mechanical mechanism between the rolling element and defect area. The vibration responses of the defective bearing simulated by the dynamics model are in good agreement with the measured vibration responses in the time, frequency, and time-frequency domain, and the double-impulse phenomenon exists in the vibration response of the defective bearing with either outer or inner raceway defect, and the average value of the dynamically varying cage rotation speed solved by the dynamics model is consistent with the theoretical calculation, which verifies the accuracy of the model. The effect of raceway defects on the cage motion state is also studied, and the cage stability index is given by combining the cage whirl instantaneous angular velocity and cage rotation angular velocity, and the cage stability index is quantified and analyzed. The analysis results show that the bearing with inner raceway defects has worse cage stability than the bearing with outer raceway defects, and there is no obvious regularity for the effect of changes in the geometry of the defect area on cage stability.