Fashewar Shenhai-Hujja
A aikace-aikacen lantarki mai hana fashewa, Abubuwan rufewa sun bambanta zuwa nau'ikan ƙarfi da ruwa, wanda aka keɓance musamman don waɗannan aikace-aikacen, sabanin faffadan rufin rukunan.
M Materials Insulation
Ana nufin kamar “m-jihar rufi kayan,” waɗannan abubuwa ne da suka kasance masu ƙarfi a ƙarƙashin yanayin aiki. Wannan rukunin ya haɗa da kayan kamar insulating varnish, wanda da farko ruwa ne amma yana da ƙarfi akan aikace-aikacen.
Abubuwan da aka fi amfani da su masu ƙarfi a cikin kayan lantarki masu tabbatar da fashewa an jera su a ƙasa.
| Matsayin kayan abu | Idan aka kwatanta da Fihirisar Bibiya (CTI) | Sunan abu |
|---|---|---|
| I | 600≤CTI | Ceramics (kyalli), mika, gilashin |
| II | 400≤CTI#600 | Melamine asbestos arc filastik, silicone Organic asbestos baka resistant filastik, unsaturated polyester tara |
| III-a | 175≤CTI 400 | Polytetrafluoroethylene filastik, melamine gilashin fiber filastik, epoxy gilashin zane allon bi da tare da baka resistant fenti a saman |
| III-b | 100≤CTI#175 | phenolic filastik |
An ƙididdige waɗannan kayan bisa ga Fihirisar Bibiyar su (CTI), ma'aunin aikin lantarki na zahiri. Duk da haka, inji su, thermal, da sinadaran Properties na iya bambanta sosai, wajabta zaɓi mai kyau dangane da takamaiman yanayin muhalli na amfani, gami da la'akari don ƙarfin injina, zafi juriya, da sinadarai karko.
yumbu (Mai kyalli) Kayayyaki
Haɗe da abubuwan da ba na ƙarfe ba na inorganic, waɗannan ana samun su ta hanyar ɓangarorin ƙarfe oxides da mahaɗan ƙarfe waɗanda ba na iskar oxygen ba. Halayensu sun haɗa da kewayon taurin 1000 ~ 5000HV, Ƙarfin ƙarfi daga 26 ~ 36 MPa, matsa lamba ƙarfi daga 460 ~ 680 MPa, wuraren narkewa sun wuce 2000 ° C, ƙananan haɓakar thermal, da high sinadaran kwanciyar hankali da juriya ga lalata.
Polytetrafluoroethylene (PTFE)
Wannan kayan fluoroplastic yana riƙe da amfani na dogon lokaci a yanayin zafi daga -180 ° C zuwa 260 ° C.. Yana da tsayin daka na sinadarai, resistant zuwa lalata, yana nuna ƙarancin juzu'i, kuma yana da mahimmancin haɓaka haɓakar haɓakar thermal.
Filastik na Phenolic
Filastik mai zafi, sananniyar kasuwanci kamar “bakelite” ko “fenolic allon,” yana iya jure yanayin zafi sama da 3000 ° C kuma yana ba da kyakkyawan juriya na ƙonawa da kwanciyar hankali na sinadarai, ko da yake yana da karye kuma baya jure lalata alkali.
Bugu da ƙari da ƙaƙƙarfan kayan rufewa da aka ambata, Na'urorin lantarki masu hana fashewar abubuwa suna amfani da ƙarfi iri-iri da yawa, gami da kayan filastik don abubuwan da aka gyara da wasu kayan taimako a cikin injinan da ba su iya fashewa.
Kayayyakin Cire Ruwa
Waɗannan suna nufin abubuwa masu rufewa galibi ana samun su a cikin sigar ruwa, kamar mai transfoma, da kayan kamar insulating varnish da aka yi amfani da su don zubar da ruwa, wanda ke ƙarfafa bayan takamaiman jiyya duk da haka har yanzu ana ɗaukar insulators na ruwa.
1. Mai Transformer
• Mahimmanci ga kayan lantarki masu hana fashewa kamar su masu wuta, dole ne wannan man ya dace da takamaiman ka'idoji:
• Wurin kunnawa baya ƙasa da 300°C.
• Wurin walƙiya baya ƙasa da 200°C (rufe kofin).
• Dankowar Kinematic baya wuce 1*10?? m²/s a 25°C.
• Ƙarfin rushewar dielectric aƙalla 27kV.
• Adadin juriya aƙalla 1*10??? m zafin jiki na 25 ° C.
• Matsakaicin Zubar da bai wuce -30°C ba.
• Acidity (neutralization darajar) har zuwa 0.03 mg/g (potassium hydroxide).
Mai Transformer, da farko wani ma'adinai insulating mai kunshe da alkanes, cycloalkanes, da unsaturated aromatic hydrocarbons, yana ba da kyawawan halayen insulating da kwanciyar hankali na tsufa. Duk da haka, An taƙaita amfani da shi a cikin kayan aikin hakar ma'adinai na Class I saboda yuwuwar lalacewar kaddarorin sa na hana amfani da shi na tsawon lokaci..
2. Varnish
Ana amfani da shi don zubar da coils na lantarki a cikin kayan da ba su iya fashewa, insulating varnish yana inganta iyawar su na lantarki. Akwai shi a cikin nau'ikan tushen ƙarfi da kuma marasa ƙarfi, Wadannan varnishes an yi su ne da resins na halitta ko na roba haɗe da sauran kaushi daban-daban kamar benzene da alcohols don nau'in tushen ƙarfi., da kuma resins na roba, masu ƙarfafawa, da masu sinadarai masu aiki irin su styrene don nau'in da ba shi da ƙarfi.
Duk nau'ikan varnish suna ba da zaɓuɓɓuka da yawa don dacewa da buƙatun aikace-aikacen daban-daban, tabbatar da daidaitawa zuwa takamaiman buƙatun aiki.