Influence of lubrication state transition on dynamic characteristics of deep groove ball bearing with localized defect in thermal environment

IF 2.8 3区 工程技术 Q2 MECHANICS International Journal of Non-Linear Mechanics Pub Date : 2024-08-30 DOI:10.1016/j.ijnonlinmec.2024.104879
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Abstract

The accuracy of the vibration response in a defective bearing dynamics model depends on the precise representation of the lubrication friction state between the rolling element (RE) and the raceway within the model. In this study, a fault dynamic model for outer ring defect of deep groove ball bearings (DGBBs), considering the lubrication state transition in a thermal environment, is established. This model accounts for the asperity contact effect during the lubrication state transition and integrates the lubrication-friction model for temperature changes into the dynamic model when skidding occurs. The influence of lubrication state change on the fault frequency of outer ring of DGBB in thermal environment is studied. The experimental and simulation results indicate that the lubrication state of the bearing is gradually deteriorated from elastohydrodynamic lubrication to mixed lubrication with the increase of working temperature. The transformation of the lubrication state is shown to have a significant effect on friction, resulting in the fault frequency of the outer ring increasing with temperature, which exhibits substantial deviation in the thermal environment. In the temperature range of 30 °C–150 °C, the deviation of defect frequency reaches 15.5%, which affects the accuracy of bearing fault diagnosis. This study may offer recommendations for enhancing the condition monitoring of rolling bearings under extreme working conditions.

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润滑状态转变对热环境中存在局部缺陷的深沟球轴承动态特性的影响
轴承缺陷动力学模型中振动响应的准确性取决于模型中滚动体(RE)与滚道之间润滑摩擦状态的精确表达。本研究建立了深沟球轴承(DGBB)外圈缺陷的故障动力学模型,考虑了热环境下的润滑状态转换。该模型考虑了润滑状态转换过程中的非圆面接触效应,并将温度变化时的润滑-摩擦模型整合到发生打滑时的动态模型中。研究了热环境下润滑状态变化对 DGBB 外环故障频率的影响。实验和仿真结果表明,随着工作温度的升高,轴承的润滑状态由弹性流体动力润滑逐渐恶化为混合润滑。润滑状态的转变对摩擦有显著影响,导致外圈的故障频率随温度升高而增加,在热环境中表现出很大的偏差。在 30 °C-150 °C 的温度范围内,故障频率的偏差达到 15.5%,影响了轴承故障诊断的准确性。本研究可为加强极端工况下滚动轴承的状态监测提供建议。
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来源期刊
CiteScore
5.50
自引率
9.40%
发文量
192
审稿时长
67 days
期刊介绍: The International Journal of Non-Linear Mechanics provides a specific medium for dissemination of high-quality research results in the various areas of theoretical, applied, and experimental mechanics of solids, fluids, structures, and systems where the phenomena are inherently non-linear. The journal brings together original results in non-linear problems in elasticity, plasticity, dynamics, vibrations, wave-propagation, rheology, fluid-structure interaction systems, stability, biomechanics, micro- and nano-structures, materials, metamaterials, and in other diverse areas. Papers may be analytical, computational or experimental in nature. Treatments of non-linear differential equations wherein solutions and properties of solutions are emphasized but physical aspects are not adequately relevant, will not be considered for possible publication. Both deterministic and stochastic approaches are fostered. Contributions pertaining to both established and emerging fields are encouraged.
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