Analyzing Dynamic Behavior of Shaft-Groove Ball Bearing System with its Working Conditions Considered
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摘要: 以轴-深沟球轴承系统为研究对象，在揭示深沟球轴承反力与轴颈中心位移之间关系的基础上，采用ADAMS动力学仿真软件研究轴-轴承系统的动力学行为，着重讨论了深沟球轴承轴向力、滚动体离心力以及轴承径向间隙等因素对轴-轴承系统动力学行为的影响。结果表明：轴向力作用对轴承起预紧作用，改变了轴-轴承系统的幅频特性，轴承轴颈中心径向位移与轴向力关系为非线性减函数关系；轴承转速增加，滚动体离心力增加，轴承支承刚度下降，轴承轴颈中心径向位移响应峰值增加；轴承间隙与轴承轴颈中心径向位移响应峰值为近似线性关系。Abstract: A shaft-groove ball bearing system is selected to study its dynamic behavior. The dynamic simulation software ADAMS is applied to reveal the relationship between the reaction force of the bearing system and the displacement of the bearing journal center. The paper focuses on discussing the influences such as the axial force applied on the deep groove ball bearing system, the centrifugal force of a rolling ball and the radial clearance of the bearing system on the dynamic behavior of the shaft-groove ball bearing system. The calculation results show that the axial force acts as a pre-tightening force on the bearing system and changes the amplitude frequency characteristics of the shaft-bearing system. The relationship between the radial displacement of the bearing journal center and the axial force has a nonlinear decrease function relation. The centrifugal force of the rolling ball increases when its speed increases so that its stiffness decreases and the central radial displacement response peak of the bearing journal center increases. The relationship between the bearing clearance and the radial displacement response peak of the bearing journal center is approximately linear.
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