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风机结构双馈ppt课件.ppt

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RotorMainshaftGearbox YawbearingGeneratorRadiator YawmotorControllerAnemometer WindVaneMechanicalbrakeSmallshaft RotorTherotorisboltedontothebigmainshaft.Thelargerotorhasthreeblades,whichcatchthewind.Thewindwillturntherotorifthereisenoughpowerinthewind.GearboxTherotorturnswithapp.22revolutionsperminute(RPM).Butthegeneratorhastoturn1500revolutionsperminute.Thegearboxconvertsthe22revolutionsto1500revolutions.返回返回GeneratorThegeneratormakeselectricitywhenitturns.Thecurrentissentdownthroughthetowerinlargeelectricitycables.返回YawmotorTheyawmotorturnsthenacellesothattherotorfacesthewind.Themotorhasacamwheelwhichfitsintothelargeyawbearingcamwheel.Thecontrollertellstheyawmotorwhentoturnthenacelle.返回AnemometerTheanemometermeasuresthewindspeed.Itsendsinformationaboutthewindspeedtothecontrollerallthetime.MechanicalBrakeThemechanicalbrakeisusedwhenthewindturbinehastoberepairedor ithastobeserviced.Itensuresthattherotorwillnotstartturning.MainShaftTherotorturnsthelargeshaft.Theshaftisconnectedtothegearbox.Therotorusesalargeforcetoturntheshaft.Thereforetheshafthastobeverythick.返回YawbearingThelargecamwheelismountedontothetower.Thecamwheeloftheyawmotorengagesthelargecamwheeland turnsthenacellewiththerotorintothewind.返回RadiatorWhenthegeneratorisrunningitgetsveryhot.Butifitbecomestoohot itwillbreakdown.Thisiswhyithastobecooleddown.Insomewindturbines(suchasthisone)thegeneratoriscooledbywater. TheradiatorcoolsthewaterControllerThewindturbinecontrollerisacomputerthatcontrolsthemanypartsofwindturbine.Thecontrolleryawsthenacelleagainstthewindandallowsthe windturbinerotortostartwhentheanemometertellsitthatthereisenoughwind.返回WindVaneThewindmakesthewindvaneturn.Thewindvanetellsthecontrollerwherethewindcomesfrom.The controllerthentellstheyawmotortoyaw–thatmeansturn– therotorupagainstthewind.返回SmallshaftThesmallshaftleadsthepowerfromthegearboxtothegenerator. Thesmallshaftrunsveryquickly,approx.1500revolutionsperminute.返回返回LatticetowerAtowercanbemadeoutofsteelprofilesthatareputtogethertoformalatt