欢迎来到天天文库
浏览记录
ID:52412125
大小:968.40 KB
页数:6页
时间:2020-03-27
《指数率水基磁流体滑动轴承单峰时变热弹流润滑分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2013年7月润滑与密封July2013第38卷第7期LUBRICAT10NENGINEERINGVo1.38No.7DOI:10.3969/j.issn.0254—0150.2013.07.008指数率水基磁流体滑动轴承单峰时变热弹流润滑分析史修江李少华王优强(1.青岛理工大学机械工程学院山东青岛266033;2.滨州市技术学院山东滨州256603)摘要:利用考虑热、磁场、时变和指数率非牛顿效应的雷诺方程,对水基磁流体滑动轴承进行微观弹流润滑分析。对比稳态解与时变解,并探讨速度、载荷对水基磁流体润滑膜压力、
2、膜厚和温度的影响。结果表明:考虑时变效应时水基磁流体的润滑膜的膜厚、压力和温度发生了明显变化,故在实际中不能用稳态解代替时变解;单个粗糙峰的存在,引起了水基磁流体润滑膜的局部最高压力峰和温度峰,由于局部压力峰的存在,使单个粗糙峰被迫压平,膜厚减小;随着速度的增加,水基磁流体润滑膜的压力峰减小,膜厚增大,温度增大;随着载荷的增加,水基磁流体润滑膜的压力峰增大,膜厚减小,温度增大。关键词:水基磁流体;滑动轴承;单粗糙峰;时变效应;弹流润滑中图分类号:TH117.2文献标识码:A文章编号:0254—0150(201
3、3)7—036—5SingleAsperitiesTransientThermalElastohydrodynamicLubricationAnalysisofPowerLawWater-basedFerrofluidJournalBearingShiXiujiangLiShaohuaWangYouqiang(1.SchoolofMechanicalEngineering,QingdaoTechnologicalUniversity,QingdaoShandong266033,China;2.BinzhouI
4、nstituteofTechnology,BinzhouShandong256603,China)Abstract:BasedontheReynoldsequationconsideringthetemperature,magneticfield,transienteffectandpowerlawnon—Newtonianeffect,theelastohydrodynamiclubricationanalysisofwater-basedferrofluidjournalbearingwascarried
5、out.Thetransientsolutionsandsteadysolutionswerecompared,andtheinfluenceofvelocityandloadonthepressure,filmthicknessandtemperatureofwater-basedferrofluidjournalbearingwasdiscussed.Theresultsshowthatthepressure,filmthicknessandtemperatureofwater—basedferroflu
6、idchangeapparentlywithtimewhenconsideringthetransienteffect,SOthesteadysolutionscannotbeusedtoreplacewithtransientsolutions.Localmaximumpressurepeakandtemperaturepeakappearbecauseofthesingleasperities.Thesingleasperitiesisfattened,theroughnesspeakandthefilm
7、thicknessaredecreasedbecauseofthelocalmaximumpressurepeak.Withtheincreaseofvelocity,thepressurepeakisdecreased,thefilmthicknessandthetemperatureareincreased.Withtheincreaseofload,thepressurepeakisincreased,thefilmthicknessisdecreasedandthetemperatureisincre
8、ased.Keywords:water—basedferrofluid;journalbearing;singleasperities;transienteffect;elastohydrodynamiclubrication磁流体是一种新型的智能材料,它既具有液体的生物兼容性和分散性好等特点,在动态密封、自润流动性又具有固体磁性材料的磁性⋯,在实际中有着滑、研磨抛光和环保等方面有很好的发展前景。广
此文档下载收益归作者所有