國產(chǎn)引進型300MW汽輪發(fā)動機組振動試驗研究.pdf

1、東南大學碩士學位論文國產(chǎn)引進型300MW汽輪發(fā)動機組振動試驗研究姓名：童小忠申請學位級別：碩士專業(yè)：動力機械及工程指導教師：陸頌元2001.3.1ABSTRACTneimported300MWBnitsaremanufacturedbyShanghaiTurbinefactoryonthebasisofusingthetechnologyofWestinghOUSeCorporationItiSakindofsubcriticaI，on

2、etimesreIleating，singleshaftdooblecylindersanddoubleexhaustpipesTurbineGeneratorunitBecausetherearesomefaultsinitsdesignationThisunitexistshighershaRvibrationduringitsdebuggingandoperationThroughanalyzing也iskindunitsstru

3、ctureandthevibrationfunIts，avalidmeansWgSUSedtogetridofthehi曲ervibrationdefaultsandreducetheNoi，N02unitsvibrationamplitudesofJiaxingPowerPlant10Wto7611levalidmeansmadethiskindunitsshaftvibrationleveIbecomeexcellentTheser

4、esearchoutcomeswerealsoUSedintheNel，N02unitsofSungyuPowerPlantintheFujianProvinceConjoiningwiththeseoverjobs，thisessayanalyzedbearingrubdefaults，shaftsystemunbalancedefaultsandshaftcurveddefaultsfromtheaspectoftheoryandt

5、estingMethodsofdealingthesedefaultswerealsesearchedandtheirpracticalusing011thedefaultunitsshowedthatthesenlethodsarescientificandvalidHPIDalianPowerplantunit4badsomevibrationdefaults：theexciterbearingvibrationwastoo11|g

6、hatthecriticalspeed；the柑bearingvibrationwastoohighat3000rpmandlowload；#lbearingvibrationwasalittlehJighatfullloadAfteranalyzingthesevibrationphenomenainaccordancewiththevibrationmonitoringdataandexcitershaftformbalancere

7、sults，thevibrationcausesandthedealingmethodsweredeterminedTheadiustnl∞tsaftlle群4bearingtightnessandclearancehadgottenridofthevibrationamplitudesincreasingandhighfrequencywavingphenomenonatemptyloadandlOWloadThe#7bearingv

8、ibrationchangedbetteratthecriticalspeedduringthecoastdownaftertheoilba用eclearancesatthedirectionofshaftwemincreaseda1ittleButtheheatdeformingstillexist酣011山eexcitershaftandtlleCaUSeSwereperhapsthelightcompactandrubBalanc

9、emovehadvalidJYdecroasedthelXvibrationof#14and#7bearing11letestingresuItsalsoshowed山atthevibrationattIlecriticaIspeedconflictswithjtat3000rpmbecauseoftheparticularityoftheunbalancemossdistributingontheexcitershaftUndert1