Mhete yekumisa pasi MTE01082-01
Tsananguro Yakadzama
Mhete yekugadzika inoita basa guru mukudzivirira kuumbwa nekuunganidzwa kwevoltage yeshaft nemabearing currents—matambudziko maviri akajairika asi anoparadza mumichina yemagetsi inotenderera senge mota nemajenareta. Shaft voltage inowanzo bva mumhedzisiro ye electromagnetic induction mukati memuchina, senge uneven magnetic flux distribution mu stator core, capacitive coupling pakati pe stator windings ne rotor, kana residual voltages kubva ku variable frequency drives (VFDs) dzinopa simba ma industrial motors mazhinji emazuva ano. Kana voltage iyi yaungana pamusoro pe shaft, inogona kudarika dielectric strength ye lubricating film mumabearing emuchina. Kana threshold iyi yayambuka, kubuda kunoitika, zvichigadzira chinonzi bearing current. Ma currents aya, kunyangwe achiwanzova madiki muhukuru, anonyanya kuunganidzwa, uye nekufamba kwenguva, anoparadza mabearing raceways nema rolling elements, zvichikonzera pitting, spalling, uye premature bearing failure. Muzviitiko zvakakomba, izvi zvinogona kukonzera kusagadzikana kwemuchina, kugadzirisa kunodhura, uye kunyange kukuvara kwechipiri kune michina yakabatana mumutsara wekugadzira.
Pamusoro pezvo, ring yekumisa pasi inobatsira mukushanda kwemagetsi (EMC) nekuderedza kuburitswa kweminda yemagetsi inorasika inogona kukanganisa michina inonzwisisika iri pedyo. Nekutsausa mafungu emvura anobuda uye kudzivirira kuyerera kwemagetsi kusingadzoreki, ring yekumisa pasi inobatsira kuchengetedza nharaunda yemagetsi yakagadzikana, ichideredza njodzi yekukanganiswa kwemagetsi (EMI) kunogona kukanganisa mashandiro emasystem ekutaurirana, ma control panels, kana mamwe magetsi akanyatsogadzirwa. Mukutevedzera mitemo nemirairo yekuchengetedza indasitiri, kuiswa kwering yekumisa pasi yakakura uye yakaiswa zvakanaka kazhinji chinhu chinodiwa kuti ive nechokwadi chekuti michina yemagetsi inoshanda zvakachengeteka, kudzivirira vashandi kubva mukuvhunduka kwemagetsi, uye kudzivirira kukuvara kwezvinhu zvinokosha.
