Pawiri - ndi chitetezo chodalirika zida kuchokera mapangidwe nkhanza

Okonza magetsi, nthawi zambiri amakumana ndi mawu akuti "pawiri". Ndi chiyani icho? Pawiri - ndi chimateteza pawiri kuti pa nthawi ya ntchito ndi madzi, kenako anachiritsa si mu solvents ake zikuchokera. Pawiri sasiya katundu wake pa kutentha osiyanasiyana kuchokera -50 kuti +200 madigiri Celsius, kugonjetsedwa ndi cheza cha impregnation, kuthira mfundo ziwalo wailesi, chitetezo magetsi kwa matabwa kusindikizidwa dera ndi zigawo zawo ndi makhalidwe Link (mawotchi, ikukhudzana mankhwala, kugwedera), makamaka mapangidwe ankhanza. Ndipotu, mavuto ndi ntchito zinthu zamakono ndi magetsi ndi apparatuses ali kutali zasayansi. Kutentha otsika ya Far North, ndi chinyezi mkulu wa kutentha, ndi kotentha kwa malo, ndi zina zotero. D. onse a pamwamba ndi kukakamiza akatswiri opanga kuteteza ntchito pa ndime ndi zokutira chinyezi kufumbwa analumikiza zipangizo potting ndi encapsulation zigawo ndi zida. Nthawi zambiri ntchito Mwaichi ziwiri zikuluzikulu zosakaniza.

Ndi katundu wa mankhwala anawagawa:

- impregnation;

- magetsi;

- kuponyera;

- zotanuka;

- mphira plasticized;

- wozama maselo kulemera plasticizer.

Impregnating pawiri - pawiri kuti ntchito impregnation wa windings wa Motors ndi makina.

Chimateteza, nayenso, anawagawa:

- thermoset (sakufewetsa pambuyo kuchiritsa). Zikuphatikizapo epoxy, poliyesitala ndi resins ena;

- thermoplastic (kufewetsa pa Kutentha) - bitumens dielectrics waxy, thermoplastic ma polima (polystyrene, polyisobutylene).

Kudzaza pawiri - zikuchokera kwa kudzaza cavities mabokosi chingwe, komanso kusindikiza mu makina magetsi ndi zipangizo.

Chimateteza osakaniza anapangidwa kuchokera esters methacrylic, ntchito ngati onse impregnation ndi kuponyera. mankhwala amenewa pambuyo kuchiritsa pa kutentha madigiri 70-100 Celsius (ndi hardener wapadera, pakhomo ili ndi adatchithisira digiri 20), ndi thermosetting ndipo angagwiritsidwe ntchito pa kutentha kwa madigiri -55 kuti +105. Iwo ntchito kwa impregnation a mitundu yosiyanasiyana zida onsewo (ndi koyilo kumulowetsa Motors ndi Al.) Amene amapereka chitetezo polimbana magetsi.

Potting pawiri zochokera phula pa mlingo wa kutentha kukana (105 ° C) wa kalasi "A". Iwo ali apamwamba kutentha kukana epoxy ndi silikoni mankhwala.

Zotanuka plasticized mphira zosakaniza apeza ntchito inayake. Today chotchuka kwambiri pawiri likamanena. Chifukwa anapanga amatha kuumba kusintha silikoni a masanjidwe osiyana. The boma kutentha pawiri ikufika malire + 200 ° C, ndi mkangano pa 250 ° C ndi osavomerezeka chifukwa polima waonongeka kulumikizana.

Panopa amabala sukulu zosiyanasiyana za mankhwala, omwe wapeza ukulu ndipo ali ndi katundu ankaikira izo.

Mankhwala ambiri anakhala epoxy pawiri - ndi polima ndi shrinkage otsika, makhalidwe kwambiri dielectric ndi mkulu guluu wolimba kwambiri. Ndi kugwira ntchito mu zinthu mapindikidwe okhazikika. resins epoxy ankagwiritsa ntchito zida zosiyanasiyana, makhazikitsidwe, nyumba. zosakaniza Awa ndi yogwirizana ndi oligomers zina ndi imathandizira oipa awo mwa kusakaniza ndi mankhwala ena. The drawback wa epoxy utomoni ndi otsika opaleshoni kutentha, zomwe zimachititsa n'zosatheka ntchito mu njira kuti ntchito mu zinthu m'malo nkhanza.

Mwachidule, tikhoza kunena kuti kugwiritsa ntchito mankhwala kumawonjezera kudalirika ntchito ndipo amawachitira moyo utumiki wa zamakono ndi zida zamagetsi, zipangitsa kusindikiza awo ndi chitetezo kugwedera, amathandiza kuteteza ogula kwa magetsi.