Ukwehliswa kwe-Motor Shaft Kuthuthukisa Ukuthembeka Kwezimotor Ezinamandla E-Inverter

Onjiniyela bezokulungisa abaphezulu kwezakhiwo zezentengiselwano noma izitshalo zezimboni bavame ukugcwalisa izinjini futhi babheke ezinye izimpawu zokukhathala, futhi ngaphandle kwamathuluzi okulungisa okuvimbela noma isoftware yokulawula ukubikezela ethuthukisiwe ukuze banikeze izexwayiso, onjiniyela bangase bame futhi bacabange, “Ayini lawo ma-motor kuzoba kubi?"Ingabe liya ngokuya lizwakala, noma kuwumcabango wami lona?”Izinzwa zangaphakathi zikanjiniyela onolwazi (izwi) kanye nama-hunches (ama-alamu aqagelayo) wemoto kungenzeka ukuthi alungile, ngokuhamba kwesikhathi, ama-bearings aphakathi nendawo lapho kungekho muntu oqaphelayo.Ukugqoka ngaphambi kwesikhathi ecaleni, kodwa ngani?Qaphela lesi sizathu "entsha" sokuhluleka ukuthwala futhi wazi ukuthi ungakuvimbela kanjani ngokususa ama-voltages emodi evamile.

Kungani izinjini zihluleka?

Nakuba kunezimbangela eziningi ezahlukene zokuhluleka kwemoto, imbangela yokuqala, isikhathi nesikhathi, ithwala ukwehluleka.Izinjini zezimboni zivame ukuzwa izinto ezahlukahlukene zemvelo ezingaba nomthelela omubi empilweni yemoto.Nakuba ukungcoliswa, umswakama, ukushisa noma ukulayisha okungalungile kungabangela ukwehluleka kokuthwala ngaphambi kwesikhathi, enye into engabangela ukwehluleka ukuthwala i-voltage yemodi evamile.

I-voltage yemodi evamile

Amamotho amaningi asetshenziswayo namuhla asebenzisa amandla kagesi awela imigqa, okusho ukuthi axhumeke ngqo emandleni ezigaba ezintathu angena esikhungweni (ngesiqalisi semoto).Amamotho ashayelwa amadrayivu okuguquguqukayo asevame kakhulu njengoba izinhlelo zokusebenza seziyinkimbinkimbi kakhulu emashumini ambalwa eminyaka adlule.Inzuzo yokusebenzisa idrayivu yefrikhwensi eshintshashintshayo ukuze ushayele injini ukunikeza ukulawula isivinini ezinhlelweni ezifana namafeni, amaphampu nama-conveyor, kanye nokugijima kwemithwalo ngendlela esebenza kahle kakhulu ukonga amandla.

Okunye okungalungile kokushintshashintsha kwamadrayivu okushayela, nokho, amandla okuguquguquka kwemodi evamile, okungabangelwa ukungalingani phakathi kwama-voltage okufaka wezigaba ezintathu zokushayela.Ukushintsha okushesha kakhulu kwe-pulse-width-modulated (PWM) inverter kungabangela izinkinga kuma-motor windings nama-bearings, ama-windings avikelwe kahle nge-inverter anti-spike insulation system, kodwa lapho i-rotor ibona ama-voltage spikes enqwabelana, lamanje. ifuna Indlela yokumelana okungenani nomhlabathi: ngama-bearings.

Ama-motor bearings agcotshwa ngamafutha, futhi amafutha kugrisi enza ifilimu esebenza njenge-dielectric.Ngokuhamba kwesikhathi, le dielectric idiliza, izinga le-voltage ku-shaft liyakhula, ukungalingani kwamanje kufuna indlela yokumelana okuncane ngokusebenzisa i-bearing, okubangela ukuthi i-bearing ibe i-arc, eyaziwa ngokuthi i-EDM (Electrical Discharge Machining).Ngokuhamba kwesikhathi, lokhu ku-arcing okuqhubekayo kwenzeka, izindawo ezingaphezulu emijahweni ethwalayo ziba brittle, futhi izingcezu ezincane zensimbi ngaphakathi kwe-bearing zingaphuka.Ekugcineni, le nto eyonakele ihamba phakathi kwamabhola athwele kanye nezinhlanga ezithwalayo, idale umthelela olimazayo ongabangela isithwathwa noma imifantu (futhi okunamandla okwandisa umsindo we-ambient, ukudlidliza, nezinga lokushisa lemoto).Njengoba isimo siba sibi kakhulu, amanye amamotho angakwazi ukuqhubeka nokusebenza, futhi kuye ngokuthi inkinga ingakanani, ekugcineni ukulimala kwama-motor bearings kungase kungenzeki ngoba umonakalo usuwenzekile.

ngokusekelwe ekuvimbeleni

Ungaphambukisa kanjani i-current ku-bearing?Isixazululo esivame kakhulu ukufaka indawo ye-shaft ekugcineni kwe-motor shaft, ikakhulukazi ezinhlelweni lapho ama-voltage emodi evamile angase avame kakhulu.I-Shaft grounding ngokuyisisekelo iyindlela yokuxhuma i-rotor ezungezayo yenjini ukuze iphansi ngohlaka lwenjini.Ukwengeza i-shaft ground enjinini (noma ukuthenga injini efakwe ngaphambili) ngaphambi kokuyifaka kungaba inani elincane uma kuqhathaniswa nezindleko zokuyilungisa ezihambisana nokufaka esikhundleni, ingasaphathwa eyokubiza kakhulu kwesikhathi sokuphumula kwesikhungo.

Izinhlobo eziningana zokuhlelwa kwe-shaft grounding zivamile embonini namuhla.Ukukhweza amabhulashi ekhabhoni kubakaki kusadumile.Lawa afana namabhulashi ekhabhoni e-DC ajwayelekile, ahlinzeka ngokuyisisekelo ukuxhumana kukagesi phakathi kwezingxenye ezijikelezayo nezimile zesekethe yemoto..Uhlobo olusha lwedivayisi emakethe idivayisi ye-fiber brush ring, lawa madivaysi asebenza ngendlela efanayo namabhulashi ekhabhoni ngokubeka imicu eminingi yemicu yokuqhuba eyindandatho ezungeze umgodi.Ingaphandle leringi lihlala limile futhi livamise ukugxunyekwa epuletini lokugcina lemoto, kuyilapho amabhulashi egibela phezu kwe-motor shaft, ephambukisa amandla emabhulashini futhi esekelwe ngokuphephile.Kodwa-ke, kumamotho amakhudlwana (ngaphezulu kuka-100hp), kungakhathaliseki ukuthi i-shaft grounding device esetshenziswayo, ngokuvamile kunconywa ukuthi kufakwe i-bearing insulated ngakolunye uhlangothi lwe-motor lapho umshini wokumisa i-shaft ufakiwe ukuze kuqinisekiswe ukuthi wonke ama-voltages ku-rotor kukhishwa ngomshini ophansi.

Ekuphetheni

Amadrayivu efrikhwensi aguquguqukayo angonga amandla ezinhlelweni eziningi, kodwa ngaphandle kokubekwa phansi okufanele, angabangela ukwehluleka kwemoto ngaphambi kwesikhathi.Kunezinto ezintathu okufanele uzicabangele lapho uzama ukunciphisa ama-voltage emodi evamile ezinhlelweni zokushayela ezishintshashintshayo: 1) Qiniseka ukuthi injini (kanye nesistimu yemoto) isekelwe kahle.2) Thola ibhalansi yefrikhwensi yenkampani yenethiwekhi efanele, ezonciphisa amazinga omsindo nokungalingani kwamandla kagesi.3) Uma ukumiswa kwe-shaft kubonakala kudingekile, khetha isisekelo esilungele isicelo.