作　　者： ; ; ; ;

机构地区： 清华大学机械工程学院摩擦学国家重点实验室

出　　处： 《润滑与密封》 2006年第10期1-3,共3页

摘　　要： 根据双电层理论,建立了外电场作用下流体润滑中的双电层引起的电粘度效应的数学模型,并通过组合滑块水润滑试验考察了双电层的电粘度效应对流体润滑性能的影响。结果表明,外加电场作用下,双电层电粘度效应对摩擦因数具有明显影响;当速度较低时,随着外加电压的增加,摩擦因数明显增大;随着速度的增加,摩擦因数增大幅度减小;试验结果同所建立的数学模型相符。 The mathematical model was developed to account for the electro-viscosity function induced by electric double layer （EDL） under conditions of external electric fields working on friction pair. The effect of the EDL function on the lubricating performance of water for a composite sliding block-disc pair was investigated in the presence of external electric field. The experimental results show that EDL has apparent effect on the friction coefficient and streaming potential. The friction coefficient in the presence of the external electric field increases at a relatively smaller velocity corresponding to a smaller film thickness. The friction coefficient predicted from the mathematical model considering the electro-viscosity function agrees well with the tested one. Thus, the established model can be used to well explain the effect of the electro-viscosity of the EDL on the lubricating performance of a liquid.

关 键 词： 双电层 外电场 数学模型

领　　域： [机械工程]