指数率水基磁流体滑动轴承单峰时变热弹流润滑分析

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Single Asperities Transient Thermal Elastohydrodynamic LubricationAnalysis of Power Law Water-based Ferrofluid Journal BearingShi Xiujiang Li Shaohua Wang Youqiang(1.School of Mechanical Engineering，Qingdao Technological University，Qingdao Shandong 266033，China；2.Binzhou Institute of Technology，Binzhou Shandong 256603，China)Abstract：Based on the Reynolds equation considering the temperature，magnetic field，transient effect and power lawnon-Newtonian effect，the elastohydrodynamic lubrication analysis of water-based ferrofluid journal bearing was carried out。

The transient solutions and steady solutions were compared，and the influence of velocity and load on the pressure，filmthickness and temperature of water-based ferrofluid journal bearing was discussed.The results show that the pressure，filmthickness and temperature of water-based ferrofluid change apparently with time when considering the transient efect，SOthe steady solutions can not be used to replace with transient solutions.Local maximum pressure peak and temperaturepeak appear because of the single asperities.The single asperities is fattened，the roughness peak and the film thicknessare decreased because of the local maximum pressure peak.With the increase of velocity，the pressure peak is decreased，the film thickness and the temperature are increased.With the increase of load，the pressure peak is increased，the filmthickness is decreased and the temperature is increased。

Keywords：water-based ferrofluid；journal bearing；single asperities；transient effect；elastohydrodynamic lubrication磁流体是-种新型的智能材料，它既具有液体的流动性又具有固体磁性材料的磁性，在实际中有着广泛的应用。随着绿色工业的发展，水基磁流体得到国际越来越多的关注，其主要特征是用水作为载液，避免了有机溶剂对环境的污染 ，并且具有超顺磁性 、基金项目：国家自然科学基金项目 (5l175275)；青岛科技计戈0项 目 (12-1-4-4- (2) -JCH)。

收稿 日期：2012-12-10作者简介：史修江 (1989-)，男，硕士研究生，研究方向为磁流体滑动轴承的弹流润滑理论.E-mail：shixiujiang###163.com。

生物兼容性和分散性好等特点，在动态密封、自润滑、研磨抛光和环保等方面有很好的发展前景 。

采用水基磁流体润滑滑动轴承，在磁场的作用下，不仅可以实现对滑动轴承的连续润滑，而