基于不同流变模型的等温线接触弹流润滑分析

发布时间：2018-01-15 18:35

本文关键词：基于不同流变模型的等温线接触弹流润滑分析　出处：《润滑与密封》2017年09期 　论文类型：期刊论文

【摘要】：选取Ree-Eyring流体、Bair-Winer流体和Carreau流体建立非牛顿流体等温弹流润滑模型,研究不同流变模型对最小膜厚和中心膜厚影响,并与Newton流体进行比较,同时讨论环境黏度对油膜压力和膜厚的影响。结果表明:基于Carreau流变模型得到的最小膜厚与实测结果最吻合;与Newton流体模型相比,Carreau流变模型和Ree-Eyring流变模型得到的油膜中心厚度较高,其中Carreau流变模型的油膜中心厚度最高,Bair-Winer流变模型得到的中心膜厚最小;与Roelands黏压模型相比,采用Doolittle自由体积黏压模型在中心区域产生较低的黏度;环境黏度高的润滑油油膜厚度增加,第二压力峰值也增大。
[Abstract]:The isothermal elastohydrodynamic lubrication model of non-Newtonian fluid is established by selecting Ree-Eyring fluid Bair-Winer fluid and Carreau fluid. The effects of different rheological models on the minimum and central thickness of the film were studied and compared with the Newton fluid. The effect of environmental viscosity on oil film pressure and film thickness is also discussed. The results show that the minimum film thickness based on Carreau rheological model is the most consistent with the measured results. Compared with the Newton fluid model and the Ree-Eyring rheological model, the oil film center thickness is higher than that obtained by the Carreau rheological model and the Ree-Eyring rheological model. The oil film center thickness of Carreau rheological model is the highest and the central film thickness obtained by Bair-Winer rheological model is the smallest. Compared with the Roelands visco-compression model, the Doolittle free volume visco-compression model produces lower viscosity in the center region. The film thickness of lubricating oil increases with high ambient viscosity, and the second pressure peak increases.
【作者单位】：湖北工业大学湖北省农业机械工程研究设计院;东风汽车股份有限公司;
【基金】：国家自然科学基金项目(51405142) 湖北工业大学高层次人才基金资助项目
【分类号】：TH117.2
【正文快照】： 自从20世纪中期DOWSON和HIGGINSON[1]对线接触弹流润滑问题研究以来,国内外学者对点、线接触问题进行了大量理论和试验研究。LEE和HAM-ROCK[2]采用圆流变模型研究了滑滚比、极限剪切强度等对等温线接触弹流润滑的影响;JACOBSON和HAMMROCK[3]用理想黏塑性流变模型研究了低滑滚

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