转速对圆柱滚子轴承热力学性能的影响

T. Mashiyane, D. Desai, L. Tartibu
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引用次数: 0

摘要

圆柱滚子轴承的高承载能力使其在旋转机械中得到广泛应用。然而,这种轴承的性能受到接触应力、刚度和经历运行的温升的阻碍。在本研究中,利用有限元分析软件Abaqus模拟了马氏体不锈钢(X20)制造的聚酰胺销式保持架滚子轴承在不同旋转/运行速度下的热力学行为。分析结果表明,轴承在运行过程中产生的温度、热流密度、接触或赫兹应力和摩擦能随着转速的增加而相应增加。进一步观察到,轴承运行速度的轻微增加导致轴承内温度和摩擦能的显着升高。此外,在所有考虑的运行速度下,在滚子轴承组件的外圈(外圈与球之间的接触点)上观察到最大赫兹/接触应力。因此,与轴承的其他部件相比,在操作期间使此外圈更容易发生故障。
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Influence of operating speed on the thermo-mechanical behaviour of cylindrical roller bearing
The high load-bearing ability of cylindrical roller bearing made its usage in rotating machinery popular. However, the performance of this bearing is impeded by the contact stress, stiffness and the temperature rise experienced operation. In this study, the thermomechanical behaviour of martensitic stainless steel (X20) fabricated roller bearing with polyamide pin type cage subjected to different rotating/operating speeds was simulated using finite element analysis software, Abaqus. The outcome of the analyses shows that the temperature, heat flux, contact or Hertzian stress and frictional energy developed in the bearing during operation increases with a corresponding increase in speed. It was further observed that a slight increase in the operating speed of the bearing leads to a significant rise in the temperature and frictional energy developed in the bearing. Also, the maximum Hertzian/contact stress was observed to developed on the outer ring of the roller bearing assembly (at the point of contact between the outer ring and the balls) in all the operational speeds considered. Thus, making this outer ring more susceptible to failure during operation as compared to the other components of the bearing.
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