Frictional traction in elastohydrodynamic lubrication
Frictional traction in elastohydrodynamic lubrication
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弹流动力润滑中的摩擦牵引
DOI：
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发表时间：
1973
期刊：
影响因子：
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通讯作者：
W. Hirst
中科院分区：
文献类型：
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作者：
D. R. Adams;W. Hirst
在恒定温度下，在一定的载荷和速度范围内测量了纯滚动的牵引力。在10、20和30 °C的受控温度下对石蜡基和环烷基矿物油进行了测量。结果形成了一个系统的模式，并提供了一个更全面的图片的变化，增加了粘度的油与负载和轧制速度比迄今已获得。结果表明，当轧制速度较低时，粘度趋于一个极限值。结果进行了比较与最近的测量由汉密尔顿和摩尔的压力分布的变化与负载和速度。这两组结果似乎表明，粘度的应用程序的压力的响应不是瞬时的，但延迟与特征松弛时间。然而，定量检验表明，这一假设是站不住脚的。结果表明，粘度随轧制速度的变化源于压力分布随速度的变化。在最高压力区，粘度对压力的响应是正常的。在入口区和出口区，剪切应力非常高，并且在这些区域中，油表现出非牛顿行为。
The traction in pure rolling has been measured at constant temperature over a range of load and speed. Measurements have been made at controlled temperatures of 10, 20 and 30 °C on a paraffinic and a naphthenic based mineral oil. The results form a systematic pattern and provide a fuller picture of the variation of the enhanced viscosity of the oil with load and rolling speed than has been available hitherto. It is shown that the viscosity tends towards a limiting value when the rolling speed is low. The results are compared with recent measurements by Hamilton & Moore of the variation of the pressure distribution with load and speed. Both sets of results appear to suggest that the response of viscosity to the application of pressure is not instantaneous, but is delayed with a characteristic relaxation time. However, quantitative examination shows that this hypothesis is untenable. It is then shown that the variation of viscosity with rolling speed originates from the variation of the pressure distribution with speed. In the region of highest pressure the response of viscosity to pressure is normal. In the inlet and outlet zones, the shear stresses are very high and in these regions the oils exhibit non-Newtonian behaviour.