Wogwira ntchito m’ng’anjo ya ng’anjo, kodi mukudziwa ma alarm akuluakulu atatu ng’anjo zosungunuka za induction?

Njira zazikulu zotetezera ma alarm a ng’anjo zosungunula zosungunula zimaphatikizapo makina oziziritsira madzi, njira yotetezera pansi ndi chitetezo cha overvoltage. Nkhaniyi ikufotokoza ndi kusanthula machitidwe atatu achitetezowa mwatsatanetsatane.

1. Alamu yoziziritsa madzi

Njira yoziziritsira madzi ndiyo njira yofunikira kwambiri yothandizira ng’anjo yosungunula, yomwe imatha kugawidwa m’magawo awiri: ng’anjo yoziziritsa thupi la ng’anjo ndi kabati yamagetsi yozizirira.

Koyilo ya ng’anjo yosungunuka yosungunula imavulazidwa ndi chubu chamkuwa. Ngakhale kuti resistivity ya mkuwa ndi yochepa, zomwe zikuchitika panopa ndi zazikulu, ndipo zamakono mu chubu chamkuwa zimasunthira kumbali ya khoma la crucible chifukwa cha khungu. , Kuchititsa kutentha kwakukulu kwa chitoliro chamkuwa (kotero utoto wotetezera womwe umagwiritsidwa ntchito pamwamba pa chitoliro chamkuwa uyenera kukhala ndi mphamvu yopirira kutentha kwakukulu). Pofuna kuonetsetsa kuti kutentha kwa ng’anjo ya ng’anjo ndi chitetezo cha dziwe losungunuka, mphamvu yoziziritsa yokwanira iyenera kutsimikiziridwa panthawi yosungunuka. Ndipo chipangizo choziziriracho sichiyenera kutsekedwa kutentha kwa crucible kusanatsike kufika 100°C. Gawo lozizira la kabati yamagetsi limagwiritsidwa ntchito makamaka kuziziritsa ma thyristors, capacitors, inductors ndi mipiringidzo yamkuwa yomwe imatulutsa kutentha kwakukulu panthawi yogwira ntchito. Kuti mukwaniritse kuzizirira bwino, nthawi zambiri ndikofunikira kukhazikitsa nsanja yozizirira panja panja. Kutengera mphamvu ya zida, thupi lodziyimira pawokha la ng’anjo ndi nsanja yoziziritsira kabati yamagetsi nthawi zina zimafunika.

Ma alarm omwe amasungunula m’ng’anjo yamadzi amaphatikizanso:

①Kutentha kwa madzi, kupanikizika ndi mita yothamanga yomwe imayikidwa pa chitoliro cholowetsa madzi kumayang’anira magawo olowera madzi amadzi ozizira. Pamene kutentha kwa madzi kupitirira mtengo wokhazikitsidwa, mphamvu ya nsanja yozizirira iyenera kuwonjezeredwa. Kutentha kukadutsa mtengo wa chenjezo kapena kuthamanga ndi kutuluka kwatsika kwambiri, alamu ndi magetsi ziyenera kusokonezedwa.

②Masensa a kutentha omwe amafunikira kukonzanso pamanja amayikidwa motsatizana ndi mapope amadzi ozizira a thupi la ng’anjo ndi kabati yamagetsi. Panthawi yokonza, malo osadziwika amatha kutsimikiziridwa mwamsanga malinga ndi batani lokhazikitsiranso la sensa ya kutentha.

2. Inverter system grounding alarm

Panthawi yogwiritsira ntchito ng’anjo yosungunuka, ng’anjo ya ng’anjo ya ng’anjo ndi capacitor imapanga dera la resonance high-voltage. Kukana kwa kutchinjiriza pansi kukakhala kotsika, ma elekitirodi otulutsa ma voltage apamwamba amatha kukhala ndi ngozi zazikulu zachitetezo. Kuti zitsimikizire kuti zidazo zimagwira ntchito bwino, muyenera kuyika njira yoteteza kutayikira pansi.

Machitidwe odziwika bwino oteteza kutayikira akugwira ntchito ziwiri:

1) Onani ngati pali njira zosazolowereka zokhala ndi kukana kwapansi pansi pakati pa ma capacitors, ng’anjo yamoto ndi mabasi;

2) Onani ngati pali kukana kwachilendo pakati pa ng’anjo yamoto ndi chitsulo. Kutsika kochepa kumeneku kungayambitsidwe ndi chitsulo cholowa mu ng’anjo yamoto kuti “ilowetse chitsulo” kapena madzi ochulukirapo mu ng’anjo yamoto. Zinyalala za conductive zomwe zikugwera mu ng’anjo ya ng’anjo zimathanso kupangitsa kuti kukana kuchepe.

Mfundo yama alarm yomwe imagwiritsidwa ntchito nthawi zambiri ndi: ikani magetsi otsika kwambiri a DC kudera la resonance, ndipo ma coil osungunula mung’anjo yamoto amangotsekedwa pang’ono. Chifukwa chake, magetsi ogwiritsidwa ntchito a DC adzapangidwa pakati pa koyilo ndi dziwe losungunuka. Mafunde ang’onoang’ono otuluka amatha kuzindikirika ndi mita ya milliampere. Kutuluka kwaposachedwa kumachulukira mosadziwika bwino, zikuwonetsa kuti kukana kwa dera la resonant pansi kumachepa modabwitsa. Ng’anjo yosungunula yomwe imagwiritsa ntchito chitetezo cha pansi pamadzi nthawi zambiri imagwiritsa ntchito waya wazitsulo zosapanga dzimbiri pansi pa ng’anjoyo kuti amatsogolere kuchokera ku ng’anjo ndikuyika pansi. Izi zitha kutsimikizira kuthekera kwa zero kwa dziwe losungunuka ndikuletsa ngozi zachitetezo panthawi yochotsa slag. Ikhozanso kuonetsetsa kuti dongosololi likhoza kuzindikira molondola chikhalidwe cha “kulowa kwachitsulo”.

Kuti muwone ngati alamu yapansi ikugwira ntchito bwino nthawi iliyonse, waya wotsogolera mu dera la resonant akhoza kulumikizidwa pansi kudzera mu inductor ndi contactor. Ndi kulamulira contactor chongopeka kulenga dera lalifupi pansi, tilinazo alamu dongosolo akhoza wapezeka pansi pa maziko kuonetsetsa chitetezo. Pofuna kuonetsetsa chitetezo cha smelting ndondomeko, fufuzani ngati dziko kutayikira Alamu chipangizo cha ng’anjo thupi lachibadwa pamaso pa aliyense kutsegula kwa ng’anjo.

3. Kutetezedwa kopitilira muyeso komanso kuchuluka kwamagetsi

Kuthamanga kwafupipafupi kwamagetsi apakati pafupipafupi kapena kulephera kwa kutembenuka kwaposachedwa kumapangitsa kuti dera la rectifier lipange mawonekedwe afupipafupi kudzera pagawo la inverter), zomwe zimawopseza kukonzanso ndi inverter thyristor, dera lachitetezo liyenera kukhazikitsidwa.