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ID:34538214
大小:2.60 MB
页数:74页
时间:2019-03-07
《多级干式罗茨真空泵实际抽速计算研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、东北大学硕士学位论文AbstractResearchonActllalPumpingSpeedCalculationofMultistageDryROOtSVacuumPuⅡlpsAbstractWiththedevelopment0felectronic,chemical,filmaIldfreeze.drVingindustries,oil.freevacuumenvironmentisneededbVmore卸dmoreindustries雒theirprocessesconditions.Therefore,rootspumpismo
2、reandmOrcdesirableinthemarket.Whenweestimater00tspump’sperfb加anCessuchasultimatepressure,weshouldpreciselVcalculatetheleakageofclearances.Butnowthere’rcmostlyexperiencefo肌ulas.Whenthepumpworks,itschannel’ssizechanges,rotorscircumrotate,andwedon’tconsidertheeffectofthemtocon
3、ductance.Sothere’sabigdifferencebetweenthevaluesoftheoreticandexperiment.Whenthecorporationdesignandproduceanewpump,theyusuaUycallrythfouglIacademicdesiEmbasedontechniquerequestsfirstlV:ThentheVproduceasamplet0validatethem.T1ledi疵rencebetweentheoretic锄dexperimentmakesustoc0
4、Hectandimproveonthedesi窜皿.LatertheVp州uceanOthersampletovalidateit.IIlthiswaywewillcertainlyuseupamassoftimeandmoneV.11lthispaper'themorcaccuratemodelingand锄eliorationoffootspump’sleakageisresearched.Wesummarizethecapabilitytar霉retsaIldtheircalculatemethodofrootspump.Somecas
5、esofclearanceleaka2譬aresimplydescribed.ThetopicismainlyOnthebuildingofthegapleaka目emodel0ftheRootspump,andt0considerthedefbnnationOwningtotheimbalancebetweentherotorsandtheimpact0ntllegapowningt0heatdistonionofthebodV.atlast,Ifinishtheimprovement册thescfactorS.Weint刚ucethero
6、torequations,characterdimensionsandmeshprinCiplesofdfc:Illar踟.c,involuteandcVcloid.Theleakage’scalculationmethodsofthesekindsofpumpsaredescribedonthebaseofamelioratedmOdel.WecanusesomesoRw铷『eandmakeuseofhigllermathematicstowritecalculationprocesstOmakethecalculationeasV.The
7、n,wecalculatetheleakagesandped.o姗ancesofafootspumppattem.W色shouldconsideritinouflaterfesearch.AmdtheVwereoDmparedandanalvzedwiththecalculatedvahlesandthemeasuredvalueswhichweren’t锄endedbefbI-c.Theresultindicatesthattherevisedc“eulatin2methOdispreciserthan臼.aditionalmethOds0
8、ntheultimatepressure.Wbcalculatethelea:ka盛eof加otpumpprototypc’andthenanalysetllero
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