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首页> 外文期刊>Journal of Tribology >Traction Behavior of Some Lubricants Used for Rolling Bearings in Spacecraft Applications: Experiments and Thermal Model Based on Primary Laboratory Data
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Traction Behavior of Some Lubricants Used for Rolling Bearings in Spacecraft Applications: Experiments and Thermal Model Based on Primary Laboratory Data

机译：航天器中用于滚动轴承的某些润滑剂的牵引行为：基于主要实验室数据的实验和热模型

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摘要

Three synthetic oils used in spacecraft mechanisms (Pennzane SHF X2000, Nye 186 A, and Fomblin Z25) have been studied. Rheological tests were performed in order to characterize the behavior of each fluid versus pressure, temperature and shear rate. That includes the determination of the WLF viscosity model parameters. Tribological tests were carried out to measure the traction coefficient for operating conditions representative of spacecraft applications. Experimental results were compared with theoretical ones obtained using a non-newtonian thermal model. The modeling of traction in EHL contact is based on the Johnson and Tevaarwerk's model modified to account for the shear heating of the fluid. The variations of the lubricant thermal conductivity with respect to temperature and pressure are also considered. In this model, input data comes directly from rheological experiments or are derived from other measurements through physical relationships. These rheological and tribological characterizations are essential to better describe the behavior of a lubricated rolling bearing.
机译：研究了三种用于航天器机理的合成油（Pennzane SHF X2000，Nye 186 A和Fomblin Z25）。进行流变测试以表征每种流体相对于压力，温度和剪切速率的行为。这包括确定WLF粘度模型参数。进行了摩擦学测试，以测量代表航天器应用的运行条件的牵引系数。将实验结果与使用非牛顿热模型获得的理论结果进行了比较。 EHL接触中牵引力的建模基于Johnson和Tevaarwerk的模型，该模型经过修改以解决流体的剪切加热问题。还考虑了润滑剂导热率相对于温度和压力的变化。在此模型中，输入数据直接来自流变实验，或通过物理关系从其他测量得出。这些流变学和摩擦学特性对于更好地描述润滑滚动轴承的性能至关重要。

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