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为了解粘弹性非Newton介质在径向轴承润滑中的效果,定义了差分粘度和剪切频率表示非Newton介质的流变特征。差分粘度的幅频响应特性表明,非Newton介质的粘度变化不仅受润滑材料动态参数的影响,而且与润滑所处的剪切频率有关。基于非Newton介质的普遍Reynolds方程,对非Newton介质的径向轴承润滑进行数值计算,在不同的动态参数和剪切频率范围的影响下,非Newton介质润滑的承载力、摩擦力等并不总是高于或低于Newton介质的润滑结果。这一结果对选择合适的材料参数和工作转速以改善非Newton介质的润滑效果具有指导意义。
To understand the effect of viscoelastic non-Newtonian media on radial bearing lubrication, differential viscosities and shear frequencies are defined to represent the rheological characteristics of non-Newtonian media. The amplitude-frequency response of differential viscosity shows that the viscosity change of non-Newtonian media is affected not only by the dynamic parameters of the lubricant but also by the shear frequency at which the lubricant is lubricated. Based on the general Reynolds equation of non-Newtonian media, the radial bearing lubrication of non-Newtonian media is numerically calculated. Under different dynamic parameters and shear frequency range, the bearing capacity and friction of non-Newtonian media are not always the same Is higher or lower than Newton’s medium lubrication results. This result is instructive in choosing the right material parameters and operating speed to improve the lubrication of non-Newtonian media.