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Prediction of pressure-viscosity coefficient of lubricating oils based on sound velocity

机译：基于声速的润滑油压力-粘度系数预测

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摘要

The pressure-viscosity coefficient is an important parameter in tribology. Experimentally, it is calculated using the high-pressure viscosity measurement. Also, the adiabatic bulk modulus is calculated using the sound velocity in the lubricating oil. Several lubricating oils are considered on the group basis such as traction oil, mineral oil, polyalphaolefin oil, perfluoropolyether oil and glycerol, depending on their molecular structure. Experimental pressure-viscosity coefficient is compared with the adiabatic bulk modulus. It is found that the pressure-viscosity coefficient increases exponentially with the adiabatic bulk modulus, and the relationship depends on the molecular structure of the lubricating oils. This study proposes two equations to predict the pressure-viscosity coefficient from the adiabatic bulk modulus based on sound velocity, one for the traction oil, and another for the paraffinic mineral oil and the polyalphaolefin oil.
机译：压力-粘度系数是摩擦学中的重要参数。实验上，它是使用高压粘度测量值计算的。同样，绝热体积模量是利用润滑油中的声速来计算的。取决于它们的分子结构，在组中考虑了几种润滑油，例如牵引油，矿物油，聚α-烯烃油，全氟聚醚油和甘油。将实验压力-粘度系数与绝热体积模量进行比较。发现压力-粘度系数随着绝热体积模量成指数增加，并且该关系取决于润滑油的分子结构。这项研究提出了两个方程，从基于声速的绝热体积模量预测压力-粘度系数，一个方程用于牵引油，另一个方程用于石蜡矿物油和聚α-烯烃油。

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