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时间:2020-03-28
《基于CFD的袋式轴承油膜特性的分析.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、第58卷第2期2016年4月汽轮机技术TURBINETECHNOLOGYv01.58NO.2Apr.2016基于CFD的袋式轴承油膜特性的分析张艾萍1,何莹1,单宝龙2(1东北电力大学能源与动力工程学院,吉林132012;2大亚湾核电运营管理有限责任公司,深圳518124)摘要:利用CFD软件分析不同油膜厚度、转速、供油压力下袋式轴承的油膜特性。首先将UG软件建立的物理模型导人Workbench的Mesh软件中进行网格划分,再计算不同的油膜厚度、转速、供油压力下的袋式轴承的油膜压力分布;由于Workbench的Flunet里没有黏温方程的计算模型,则需要用Flunet里的u
2、df自定义编程接口将编写的c一程序导入该软件的计算器中,求解袋式轴承在不同转速、油膜厚度和供油压力下油膜温度分布。结果表明:通过对袋式轴承的数值模拟可以看出,最佳的油膜厚度、转速、供油压力对袋式轴承的油膜特性及对旋转机械转子稳定性起着非常重要的作用。汽轮机启动运行时,在合理的转速范围内,转速越大,温升降低,油膜稳定性越好,汽轮机转子运行就越加稳定;最佳的油膜厚度和供油压力使袋式轴承油膜压力稳定,温升小,使承载能力提高,且保证汽轮机安全稳定运行。关键词:滑动轴承;袋式轴承;油膜特性;转子稳定性分类号:THl33.3l文献标识码:A文章编号:1001—5884(2016)02-
3、0084-05OilFilmCharacteristicsofBagBearingandItsEffectonStabilityofRotorZHANGAi—pin91,HEYin91,SHANBao-lon92(1Schoolofenergy.andpowerengineering,NortheastDianliUniversity,Jilin132012,China;2DaraBayNuclearPowerOperationsAndManagementCompanyIAmited,Shenzhen518124,China)Abstract:Analysisofdiffe
4、rentfilmthickness,speed,bagbearingoilfilmcharacteristicsunderoilpressureusingCFDsoftware.First,thephysicalmodelofUGsoftwarebuiltintoWorkbenchsoftwarefortheMeshmesh,thencalculatedifferentfilmthickness,speed,bagbearingoilfilmpressuredistributionundersupplypressure;theWorkbench名flunethasnovis
5、cosity·temperatureequationcomputingmodel,weneedtouseflunetLaneudfcustomprogramminginterfaceⅥTitteninC“programtoimportthesoftwaretosolveabagbearingcalculatoratdifferentspeeds,theoilfihnthicknessandoilpressurefilmtemperaturedistribution.Theresultsshowedtlmt:throughnumeficMsimulationpaperbagb
6、earingcanbeseen,thebestfilmthickness,speed,oilpressureofthebagfeaturefilmbearingsandrotatingmachineryrotorstabilityplaysavery.importantrole.Whenareasonablespeedrangeinspeedoftheturbinestartrunninglargertemperaturedecreases,thefilmstabilityaspossible,becomeevenmorestableoperationoftheturbin
7、erotor;optimalfilmthicknessandoilpressurebagbearingoilfilmpressureisstable,temperatureriseissmall,SOthecarryingcapacityincrease,andtoensuresafeandstableoperationoftheturbine.Keywords:slidingbearing;bagbearing;oilfilmcharacteristics;rotorstability0前言袋式轴承类似于椭圆结构
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