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圆柱滚子式三叉杆万向联轴器热弹流脂润滑特性分析*
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山东省重点研发计划项目(2018GGX103015)


Analysis of Thermal Elastohydrodynamic Grease Lubrication Characteristic of Cylindrical Roller Tripod Universal Coupling
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    摘要:

    为了分析圆柱滚子式三叉杆万向联轴器圆柱滚子与滑块槽之间的脂润滑状况,基于Ostwald模型建立线接触热弹流脂润滑数值计算模型。结合联轴器的稳态工况参数,采用多重网格法、逐列扫描法对润滑油膜压力、膜厚和平均温升求解;探究不同输入轴与输出轴轴线夹角、不同输入轴回转半径、不同圆柱滚子半径、不同初始黏度和不同流变指数对联轴器热弹流脂润滑特性的影响。研究结果表明:减小输入轴与输出轴轴线夹角、减小输入轴回转半径、减小润滑脂初始黏度有利于降低二次压力峰和平均温升,但膜厚减小;增大圆柱滚子半径有利于降低二次压力峰和平均温升,增大膜厚;增大流变指数,有利于增大膜厚,降低温升,但二次压力峰增大。因此,根据实际工况选择较小回转半径,适当减小轴线夹角和增大圆柱滚子半径,适当减小润滑脂初始黏度和增大流变指数,均有利于改善联轴器润滑特性。

    Abstract:

    In order to analyze the grease lubrication condition between cylindrical roller and slider groove of cylindrical roller tripod universal coupling,a numerical calculation model of linear contact thermal elastohydrodynamic grease lubrication was established based on Ostwald model.Combined with the steadystate operating parameters of the coupling,the multigrid method and columnbycolumn scanning method were adopted to solve the pressure,film thickness and average temperature rise of lubricating oil film.The effects of different angles between input shaft axis and output shaft axis,different input shaft rotation radius,different cylindrical roller radius,different initial viscosity and different rheological index on the thermal elastohydrodynamic grease lubrication characteristics of coupling were investigated.The results show that reducing the angle between the input shaft axis and the output shaft axis,reducing the radius of rotation of the input shaft,and reducing the initial viscosity of grease are beneficial to reducing the secondary pressure peak and average temperature rise,but the film thickness is reduced.Increasing the radius of cylindrical roller is beneficial to reduce the secondary pressure peak,average temperature rise and increase the film thickness.Increasing rheological index is beneficial to increase film thickness and reduce temperature rise,but secondary pressure peak is increased.Therefore,it is conducive to improving the lubrication characteristics of the coupling according to the actual working conditions by selecting a smaller rotation radius,appropriately reducing the angle between input shaft axis and output shaft axis and increasing the cylindrical roller radius,appropriately reducing the initial viscosity of grease and increasing the rheological index.

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杨福芹,肖乾浩,胡德兴,宋豪杰,刘 欣.圆柱滚子式三叉杆万向联轴器热弹流脂润滑特性分析*[J].润滑与密封,2021,46(3):44-50.
YANG Fuqin, XIAO Qianhao, HU Dexing, SONG Haojie, LIU Xin. Analysis of Thermal Elastohydrodynamic Grease Lubrication Characteristic of Cylindrical Roller Tripod Universal Coupling[J]. Lubrication Engineering,2021,46(3):44-50.

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  • 在线发布日期: 2022-03-10
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