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温度变化对新型混合槽水润滑橡胶轴承润滑特性的影响
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国家自然科学基金项目(11972282);陕西省自然科学基金重点项目(2018JZ1001)


Effect of Temperature Variation on Lubrication Characteristics of a New Type Water-Lubricated Rubber Bearing with Mixed Grooves
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    摘要:

    为研究新型混合槽水润滑橡胶轴承的润滑特性,采用有限元法建立了橡胶轴承的热流固耦合模型,在考虑不同进水温度和不同转速的条件下,分析了混合槽橡胶轴承与带有T形、V形沟槽的橡胶轴承在衬层变形、水膜压力、流场速度等方面的差异。结果表明:混合槽橡胶轴承能较好地适应水温的变化,解决了T形、V形沟槽橡胶轴承存在的衬层变形大、水膜压力较低的问题,并改善了单一槽型轴承承压区压力峰值急剧变化的问题;随着进水温度的升高,衬层变形量和水膜压力均减小,承载力下降,而且较高转速下承载力的下降趋势比低转速下更为明显;随着进水水温的升高,水的黏性系数持续降低,橡胶轴承的润滑状态变差,轴承润滑状态由混合润滑和弹流润滑状态过渡到完全混合润滑状态。

    Abstract:

    In order to study the lubrication characteristics of a new type waterlubricated rubber bearing with mixed grooves,a thermalfluidstructure coupling model for waterlubricated rubber bearing was established by finite element method,the differences of rubber liner deformation,water film pressure distribution and flow field velocity of the rubber bearing with mixed grooves,T-type grooves and V-type grooves were analyzed under different inlet water temperature and different rotation speeds.The results show that the rubber bearing with mixed grooves can better adapt to the change of water temperature,solve the problems of large deformation of rubber layer and low water film pressure for the rubber bearing with T-type grooves and V-type grooves,and effectively improve the sharp change of water film pressure peak in bearing area.As the inlet water temperature increasing,the rubber layer deformation and the water film pressure are decreased,the bearing capacity is reduced,and the downward trend of the bearing capacity at higher speeds is more obvious than that at low speeds.With the increase of inlet water temperature,the viscosity coefficient of water is decreased continuously,the lubrication state of rubber bearing becomes worse,and the bearing lubrication state changes from the mixed lubrication and elastohydrodynamic lubrication state to the fully mixed lubrication state.

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侯高强,李明.温度变化对新型混合槽水润滑橡胶轴承润滑特性的影响[J].润滑与密封,2020,45(6):95-100.
. Effect of Temperature Variation on Lubrication Characteristics of a New Type Water-Lubricated Rubber Bearing with Mixed Grooves[J]. Lubrication Engineering,2020,45(6):95-100.

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  • 在线发布日期: 2020-11-13
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