多级蜗壳式煤制油泵的设计和可靠性分析

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1、江苏大学硕士学位论文ABSTRACTWiththerapiddevelopmentofournationaleconomy,thedemandforoilisgettinggreaterandgreater．However,thereismorecoalthananyotherenergyintheenergystructureofourcountry,whileoilaccountsforasmallproportioninthisstructure．Therefore，itisasignifica

2、ntstrategicmeasuretoobtainoilfromcoaltomeetthedemandforoilandrespondtotheenergychallengeinChina．Themulti—stagepumpwithvoluteisoneoftheimportantequipmentsinthetechnologyofgettingoilfromcoal．Currently,thispumpsusedinthetechnologyofgettingoilfromcoalareall

3、imported．Asaresult,thepriceofthepumpishigh．Meanwhile，theappropriatetechnologycannotbeachieved．Inviewofthepresentsituation，itisveryimportanttodoaseriousstudyonthedesignandreliabilityforthepump，whichisbothofvitalsignificanceinpracticalengineeringandhighac

4、ademicmeaning．Thispaperfocusedonthestudyofthehydraulicdesign，structuraldesign，thenumericalfluidsimulationandthefiniteelementdynamiccharacteristicswitllfluid-solidinteractionofthemulti-stagepumpwithvoluteusedinthetechnologyofgettingoilfromcoal，whichaimst

5、oimprovetheefficiencyandreliabili哆ofthispump．Themainresearchandachievementsofthispaperareasfollows：1．Accordingtothemainapplicationareasofthemulti—stagepump丽thvolute，thestructureofthispumpWasdesignedaftersummarizingtheadvantagesanddisadvantagesofthestruc

6、tureofmulti—stagecentrifugalpumps．2．Referencinghydraulicmodelandlearningfrommaturedesignexperience，thesuctionchamber,impellerandvoluteofallstages’hydraulicofthemulti—stagepumpwithvoluteweredesignedbyadoptingspeedcoefficientmethod．Thestructuralandhydraul

7、icdesignofthispumpwerefirstfinishedinourcountry．3．TheinternalflowWassimulatedbyFLUENT6．3丽thineverystagepumpofthemulti—stagepumpwithvolute．Thenthestaticpressureandtheflowcharacteristicsofspeedwereanalyzed．Meanwhile，theenergyperformanceofthepumpatallstage

8、sWaspredictedonthebasisofnumericalsimulation．4．AfterthevibrationmodelofentirerotorforthefiniteelementWasanalyzedbythefmiteelementsoftwareANSYS，10naturalfrequenciesandthecorrespondingvibrationmodeldiagramcanbeobtained．Thenthecorre