Injini ejikelezayo

Kunezinhlobo eziningi zemishini kagesi ejikelezayo.Ngokusho imisebenzi yabo, zihlukaniswe generator kanye motors.Ngokwemvelo ye-voltage, ihlukaniswe ngama-DC motors nama-AC motors.Ngokusho kwezakhiwo zabo, zihlukaniswe ngama-motor synchronous kanye nama-asynchronous motors.Ngokwenani lezigaba, ama-asynchronous motors angahlukaniswa abe yizigaba ezintathu zama-asynchronous motors kanye nesigaba esisodwa se-asynchronous motors;ngokusho kwezinhlaka zabo ezihlukene ze-rotor, zihlukaniswe zibe izinhlobo ze-cage kanye nezilonda ze-rotor.Phakathi kwazo, i-cage three-phase asynchronous motors ilula ngesakhiwo futhi yenziwe.Ukunethezeka, intengo ephansi, ukusebenza okuthembekile, okusetshenziswa kabanzi kuma-motor ahlukahlukene, isidingo esikhulu kunazo zonke.Ukuvikelwa kombani kwemishini kagesi ejikelezayo (amajeneretha, ukulungisa amakhamera, ama-motor amakhulu, njll.) kunzima kakhulu kune-transformer, futhi izinga lengozi yombani ngokuvamile liphakeme kunele-transformers.Lokhu kungenxa yokuthi umshini kagesi ojikelezayo unezici ezithile ezihlukile ku-transformer ngokuya ngesakhiwo sokufakelwa, ukusebenza nokuxhumana kokufakwa.
(1) Phakathi kwezisetshenziswa zikagesi zezinga lamandla kagesi afanayo, amandla okumelana ne-voltage yokufakwa komshini kagesi ojikelezayo aphansi kakhulu.
Isizathu yilesi: ①Injini inerotha ejikelezayo enesivinini esikhulu, ngakho-ke ingasebenzisa indawo eqinile kuphela, futhi ayikwazi ukusebenzisa uketshezi oluqinile (uwoyela we-transformer) inhlanganisela ephakathi nendawo njenge-transformer: ngesikhathi senqubo yokukhiqiza, indawo eqinile yonakala kalula. , futhi ukufakwa kwe-insulation kungu-Voids noma izikhala zivame ukwenzeka, ngakho-ke ukukhishwa okuncane kujwayele ukwenzeka ngesikhathi sokusebenza, okuholela ekonakaleni kwe-insulation;②Izimo zokusebenza ze-motor insulation zinzima kakhulu, zingaphansi kwemiphumela ehlanganisiwe yokushisa, ukudlidliza kwemishini, umswakama emoyeni, ukungcola, ingcindezi kazibuthe, njll. , Ijubane lokuguga liyashesha;③Inkambu kagesi yesakhiwo sokufakwa kwemoto ifana ngokuqhathaniswa, futhi i-coefficient yayo yomthelela iseduze no-1. Amandla kagesi ngaphansi kokugcwala ngokweqile isixhumanisi esibuthakathaka kakhulu.Ngakho-ke, i-voltage elinganiselwe kanye nezinga lokufakwa kwe-motor ayikwazi ukuba phezulu kakhulu.
(2) Amandla kagesi ayinsalela wesibambi sombani asetshenziselwa ukuvikela injini ezungezayo asondele kakhulu ku-voltage ukumelana nomfutho wenjini, futhi i-insulation margin incane.
Isibonelo, amandla embonini amelana nevelu yokuhlolwa kwe-voltage yejeneretha kuphela ngo-25% kuya ku-30% ngaphezu kwevelu ye-voltage eyi-3kA eyinsalela yesibambi se-zinc oxide, kanye nemajini yesibambi esivuthwe nguzibuthe mancane, futhi i-insulation margin izoba nciphisa njengoba i-generator isebenza.Ngakho-ke, akwanele ukuthi i-motor ivikelwe ngumvimbi wombani.Kufanele ivikelwe inhlanganisela yama-capacitor, ama-reactors, nezingxenye zekhebula.
(3) I-inter-turn insulation idinga ukuthi ukujula kwegagasi elingenayo kulinganiselwe.
Ngenxa yokuthi i-inter-turn capacitance ye-motor winding incane futhi ayiqhubeki, i-wave overvoltage ingasakazeka kuphela eduze kwe-conductor emazombezo ngemuva kokungena ekujikeni kwe-motor, futhi ubude bokujika ngakunye kokujika bukhulu kakhulu kunokwe-transformer winding. , esebenza ngokuphenduka okubili okuncikene I-overvoltage ilingana nomqansa wegagasi elingenayo.Ukuze kuvikelwe i-inter-turn insulation ye-motor, ukujula kwegagasi elingenayo kufanele kube nomkhawulo ngokuqinile.
Ngamafuphi, izidingo zokuvikela umbani zemishini kagesi ejikelezayo ziphakeme futhi zinzima.Kuyadingeka ukuthi ucabangele ngokugcwele izidingo zokuvikela ze-insulation eyinhloko, i-inter-turn insulation kanye ne-neutral point insulation of the winding.