Shenhai e fakamoʻoni fakaʻauha
ʻI he ngaahi polokalama fakaʻuhila ʻoku fakaʻauha, ʻOku differentiated ʻa e ngaahi naunau ʻaofi maluʻi mei ki ha faʻahinga ʻoku fefeka mo huhuʻa, fakafeʻungaʻi pe ki he ngaahi polokalama ko ʻeni, ʻikai tatau mo e ngaahi faʻahinga ʻaofi maluʻi mei lahi ange.
Ngaahi naunau ʻaofi maluʻi mei fefeka
Naʻe ui ko e “ngaahi naunau ʻaofi maluʻi mei fefeka,” Ko e ngaahi meʻa ʻeni ʻoku kei fefeka ʻi he ngaahi tuʻunga ngaue. ʻOku kau ʻi he faʻahinga ko ʻeni ʻa e ngaahi naunau hange ko e maluʻi varnish, ʻa ia ʻoku ʻuluaki huhuʻa ka ʻoku ne fakamalohia hono fakaʻaongaʻi.
ʻOku hiki atu ʻi lalo ʻa e ngaahi naunau ʻaofi maluʻi mei fefeka ʻi he ngaahi meʻangaue fakaʻuhila ʻoku fakaʻauha.
| Maaka ʻo e naunau | Fakafehoanaki ki he Fakahokohoko Fakamotuʻalea ʻo e Muimuiʻí (CTI) | Hingoa ʻo e nāunaú |
|---|---|---|
| I | 600≤CTI | Ceramics (glazed), Maʻuʻanga Fakamatala, ipu sioʻata |
| II | 400≤CTI<600 | Melamine asbestos Arc) pelesitiki, asbestos Arc) ʻa e pelesitiki, ʻikai ke ʻi ai ha Poliesita aggregate |
| III-a | 175≤CTI<400 | Polytetrafluoroethylene pelesitiki, milemila ʻo e filo sioʻata, epoxy e papa tupenu sioʻata ʻoku ngaohi ʻaki e Arc) ʻa e vali ʻi he fukahi tahi |
| III-e | 100≤CTI<175 | Phenolic pelesitiki |
ʻOku fakamaaka ʻa e ngaahi naunau ko ʻeni ʻo makatuʻunga ʻi heʻenau fakahokohoko fakamotuʻalea ʻo e taʻofi muimuiʻi (CTI), ko ha meʻafua ʻo e ngāue fakaʻuhila angamahení. Neongo ia, ʻenau ngaahi meʻa fakamisini, thermal, pea ʻe lava ke kehekehe ʻaupito ʻa e ngaahi koloa ʻo e kemikale, fie maʻu ke fili fakalelei ʻo makatuʻunga ʻi he ngaahi tuʻunga pau ʻo hono fakaʻaongaʻi, kau ai e ngaahi fakakaukau ki he malohi fakamisini, fakafepaki ki he vela, mo tolonga e kemikalé.
Taila maka (ʻOku ʻikai ke ʻi ai ha meʻ) Ngaahi Nāunaú
ʻOku kau ai ʻa e ngaahi meʻa ʻoku ʻikai ke ʻi ai ha meʻa ʻaofi maluʻi mei, ʻOku faʻu ʻeni ʻe sintering ukamea oxides mo e ukamea ʻoku ʻikai ke ʻi ai ha meʻa koʻeni. ʻOku kau ʻi honau ngaahi ʻulungaanga ha fefeka ʻo e 1000 ~ 5000HV, tensile malohi mei he 26 ~ 36 MPa, compressive malohi mei he 460 ~ 680 MPa, ngaahi poini ʻoku fuʻu lahi 2000 ° c, mafola ʻa e thermal, mo e tuʻu maʻu ʻa e kemikale maʻolunga mo e fakafepaki ki he corrosion.
Polytetrafluoroethylene (PTFE)
ʻOku poupouʻi ʻe he naunau fluoroplastic ko ʻeni ʻa hono fakaʻaongaʻi taimi loloa ʻi he mafana ʻo e ʻea mei he 180 ° c ki he 260 ° c. ʻOku faitoʻi lelei ʻaupito, matuʻuaki e corrosion, fakaʻaliʻali ha fekainaki maʻulalo, pea ʻoku ʻi ai ha ngaahi meʻa mahuʻinga ʻoku ne fakalahi ʻa e.
Phenolic pelesitiki
Ko ha pelesitiki thermosetting, ʻiloa fakakomesiale ko e “bakelite” pe “phenolic palakipoe,” te ne lava ʻo matuʻuaki ʻa e mafana ʻo e ʻea 3000 ° c pea ʻoku ne ʻomi ha fakafepaki lahi mo e kemikale, Neongo ʻoku ngavaivai pea ʻikai ke ne matuʻuaki ʻa e alkali corrosion.
Makehe mei he ngaahi naunau ʻaofi maluʻi mei fefeka ʻoku lau ki ai, ʻOku fakaʻaongaʻi lahi ʻe he meʻangaue fakaʻuhila ʻa e ngaahi meʻa kehekehe ʻoku ne maluʻi, kau ai ʻa e ngaahi naunau pelesitiki ki hono maluʻi ʻo e ngaahi konga mo e ngaahi naunau pau ʻo e houalotu ʻi he moto ʻo e fakamoʻoni fakaʻauha.
Ngaahi naunau ʻaofi maluʻi mei huhuʻa
ʻOku ʻuhinga ʻeni ki he ngaahi meʻa ʻoku faʻa maʻu ʻi he foomu huhuʻa, hange ko transformer lolo, mo e ngaahi naunau hange ko e varnish ʻoku fakaʻaongaʻi ki he coil impregnation, ʻa ia ʻoku ne fakamalohia ʻa e ngaahi faitoʻo pau ka ʻoku kei lau pe ko e huhuʻa insulators.
1. Transformer lolo
• Mahuʻinga ki he ngaahi meʻangaue fakaʻuhila hange ko e transformers, kuo pau ke feau ʻe he lolo ko ʻeni ha ngaahi tuʻunga moʻui pau:
• Ignition ʻikai ʻi lalo ʻi he 300 ° c.
• ʻOku ʻikai ʻi lalo ʻa e Flash ʻi he 200 ° c (ipu kuo tapuni).
• Kinematic viscosity ʻikai ke fuʻu lahi 1*10?? m 8/s ʻi he 25 ° c.
• Dielectric e malohi ʻo ʻikai toe siʻi hifo he 27kV.
• Voliume resistivity ʻikai toe siʻi hifo ai 1*10??? m ʻi he 25 ° c.
• Huaʻi hifo ʻa e poini ʻo ʻikai ʻi ʻolunga-30 ° c.
• Acidity (neutralization mahuʻinga) hake ki he 0.03 mg/g (e sotiume hydroxide).
Transformer lolo, ʻo fakatefito ʻi ha lolo ko ʻoku kau ai ʻa e alkanes, cycloalkanes, mo e aromatic hydrocarbons, ʻomi ha ngaahi ʻulungaanga lelei mo ha tuʻunga malu motuʻa. Neongo ia, hono fakaʻaongaʻi ʻi he kalasi ʻoku ou keli ʻoku fakangatangata pe ʻa e meʻangaue koeʻuhi ko e malava ke maʻulalo hono ngaahi koloa ʻi hono fakaʻaongaʻi fuoloa.
2. Varnish
Fakaʻaongaʻi ki he impregnating ʻuhila ai ʻi he meʻangaue ki he fakamoʻoni fakaʻauha, ʻOku fakaleleiʻi ʻe he varnish ʻa ʻenau ʻuhila ʻaofi maluʻi mei malava. Maʻu ʻi he ngaahi foomu solvent-based mo e solvent-free, ʻOku faʻu ʻa e varnishes ko ʻeni ʻaki ha resins fakanatula pe synthetic fakataha mo ha ngaahi solvents kehekehe hange ko benzene mo alcohols ki he faʻahinga solvent ʻoku makatuʻunga ʻi he, mo e synthetic resins, kau fakafofonga fakafefekaʻi, mo e thinners malohi hange ko e styrene ki he faʻahinga taʻetotongi solvent.
ʻOku fakatou ʻomi ʻe he ongo faʻahinga varnish ha ngaahi fili lahi ke feʻunga mo e ngaahi fie maʻu kehekehe ʻo e tohi kole, fakapapauʻi e lava ke feliliuaki ki he ngaahi fie maʻu pau ki hono fakalele.