Ka dib markaad tan akhrido, waxaad yeelan doontaa faham dhammaystiran oo ku saabsan agabka iyo dhismaha jidhka transformer-ka

Qalabka ugu muhiimsan ee jirka wax-soo-saarka waxaa ka mid ah agabka wareegga birlabta, agabka wareegga, agabka dahaarka, agabka dhismaha, iwm. Isticmaalka gaarka ah ee agabka iyo qaybaha waa:

1. Xaashi bir ah oo silikoon ah

Transformer-ka, shuruudaha waxqabadka birta silikoonku waxay inta badan yihiin:

①Dhibaatada birta oo hooseysa, taas oo ah tilmaanta ugu muhiimsan ee tayada xaashiyaha birta ee silikoon. Dhammaan waddamada waxay u qaybiyaan darajooyinka iyadoo loo eegayo qiimaha khasaaraha birta. Inta uu hoos u dhaco khasaaraha birta, ayaa heerka sare u kaca.

② Xoogga kicinta birlabta (induction magnetic) wuxuu ku badan yahay goobta birlabta xooggan, taas oo yaraynaysa mugga iyo miisaanka xudunta birta ee matoorka iyo transformer-ka, waxayna badbaadinaysaa xaashida birta silicon, fiilooyinka naxaasta ah iyo walxaha dahaarka leh.

③Dusha sare waa siman tahay, siman tahay oo dhumucdeedu isku mid tahay, taas oo hagaajin karta qodobka buuxinta ee xudunta birta.

④Waxay leedahay awood wanaagsan oo lagu xoqo waana fududahay in la farsameeyo.

⑤Xidhmada iyo alxanka filimka dahaarka dusha sare waa kuwo wanaagsan, taas oo ka hortagi karta daxalka oo hagaajin karta hantida feerka.

⑥ Asal ahaan ma jiraan gabowga birlabta.

Kala-soocidda iyo qeexidda darajada ee xaashida birta silikoon

Beddelayaashu waxay badanaa isticmaalaan xaashiyaha birta silicon ee ku salaysan hadhuudhka qabow si loo hubiyo heerarka waxtarka tamarta aan culayska lahayn. Xaashida birta silicon ee ku salaysan hadhuudhka qabow waxaa loo qaybin karaa xaashi bir silicon ah oo ku salaysan hadhuudhka qabow, xaashi bir silicon ah oo leh awood bir oo bir ah oo bir ah oo bir ah oo bir ah oo bir ah oo bir ah oo bir ah oo bir ah oo bir ah oo bir ah (ama xaashi bir silicon ah oo bir ah oo bir ah oo bir ah oo bir ah oo bir ah), iyo xaashi bir silicon ah oo laysar ah iyadoo loo eegayo sifooyinka iyo hababka farsamaynta. Caadi ahaan, marka la eego goobta magnetic-ka ee beddelan (qiimaha ugu sarreeya) ee 50Hz iyo 800A, xaashida birta silicon ee leh kala-goynta ugu yar ee bir ah B800A=1.78T~1.85T oo ay gaarto xudunta birta waxaa loo yaqaan xaashi bir silicon caadi ah, oo loo yaqaan "CGO", iyo B800A=1.85T ama ka badan. Farqiga ugu weyn ee u dhexeeya birta Hi-B iyo birta silicon ee caadiga ah waa: qaabka jihada Gaussian ee birta Hi-B Heerka birta silicon aad ayuu u sarreeyaa, taas oo ah, isku-dubbaridka hadhuudhka birta silicon ee jihada magnetization-ka fudud aad ayuu u sarreeyaa. Warshadaha, habka dib-u-cusboonaysiinta labaad waxaa loo isticmaalaa in lagu soo saaro xaashiyaha birta silicon oo leh maaddada silicon ee 3%. Jihada hadhuudhka ee birta Hi-B aad bay u sarreysaa. Celceliska leexashada jihada rogrogidda waa 3°, halka tan xaashida birta silicon ee caadiga ah ay tahay 7°, si birta Hi-B ay u yeelato dheellitir bir ah oo sare, badanaa B800A-geeda waxay gaari kartaa in ka badan 1.88T, taas oo hagaajinaysa qaab-dhismeedka jihada Gaussian iyo dheellitirka bir-gashiga wuxuu yareeyaa lumitaanka birta. Astaamo kale oo ka mid ah birta Hi-B ayaa ah in xiisadda laastikada ee filimka galaaska iyo dahaarka dahaarka leh ee ku xiran dusha sare ee xaashida birta ay tahay 3~5N/mm2, taas oo ka wanaagsan 1~2 N/mm2 ee xaashida birta silicon ee caadiga ah. Lakabka xiisadda sare wuxuu yareeyaa ballaca domain-ka bir-gashiga wuxuuna yareeyaa khasaaraha aan caadiga ahayn ee hadda eddy. Sidaa darteed, birta Hi-B waxay leedahay qiimo lumis bir ah oo ka hooseeya xaashida birta silicon ee caadiga ah ee ku salaysan hadhuudhka.

Xaashida birta silicon ee calaamadeysan ee laysarka waxay ku salaysan tahay birta Hi-B, iyada oo loo marayo tiknoolajiyada shucaaca laysarka, dusha sare si yar ayaa loo cadaadiyaa, dhidibka birlabta ayaa si dheeraad ah loo hagaajiyaa, khasaaraha birta ee hooseeyana waa la gaaraa. Xaashiyaha birta silicon ee calaamadeysan ee laysarka laguma xiri karo, sababtoo ah saameynta daaweynta laysarka way baaba'aysaa haddii heerkulku kordho.

Badanaa waa qiyaastii 1.56T, taasoo qiyaastii 20% ka duwan cufnaanta qulqulka dheregga ee xaashida birta silicon ee caadiga ah 1.9T, sidaa darteed cufnaanta qulqulka naqshadeynta ee transformer-ka ayaa sidoo kale loo baahan yahay in la dhimo 20%. Cufnaanta qulqulka naqshadeynta ee transformers-ka saliidda daawaha ee aan qaab-dhismeedka lahayn badanaa waxay ka hooseysaa 1.35T. Cufnaanta magnetic-ga ee naqshadeynta isbeddelka qalalan ee daawaha kristaliga ah badanaa waxay ka hooseysaa 1.2T.

2) Xariijimaha asaasiga ah ee aan qaab-dhismeedka lahayn waxay u nugul yihiin cadaadiska. Ka dib marka xariijimaha asaasiga ah la cadaadiyo, waxqabadka aan culayska lahayn si fudud ayuu u xumaan karaa. Sidaa darteed, fiiro gaar ah waa in loo yeesho qaab-dhismeedka. Xuddunta waa in lagu laalaadaa qaab-dhismeedka taageerada iyo gariiradda. Qaado cufisjiidadka u gaarka ah, isla markaana, fiiro gaar ah waa in la siiyaa inta lagu jiro habka isu-imaatinka, xuddunta birta lama cadaadin karo, garaaca iyo hababka kale waa in la dhimo.

3) Magnetostriction wuxuu qiyaastii 10% ka weyn yahay xaashida birta silicon ee caadiga ah, sidaa darteed buuqeeda way adag tahay in la xakameeyo, taas oo sidoo kale ah mid ka mid ah sababaha ugu waaweyn ee xaddidaya kor u qaadista baahsan ee transformers-ka aan qaab-dhismeedka lahayn. Buuqa transformer-ku wuxuu soo bandhigayaa shuruudo sare, kuwaas oo loo qaybiyay meelo xasaasi ah iyo meelo aan xasaasi ahayn, shuruudaha heerka codkana waxaa loo soo bandhigayaa si bartilmaameedsan, taas oo u baahan in la yareeyo cufnaanta birlabta ee naqshadda asaasiga ah.

4) Xarigga dahaarka aan qaab-dhismeedka lahayn waa mid khafiif ah, dhumucdiisuna waa 0.03mm oo keliya, sidaa darteed looma samayn karo qaab dahaar ah sida xaashi bir ah oo silikoon caadi ah, laakiin waxaa loo samayn karaa oo keliya xudunta birta ee duuban. Sidaa darteed, qaab-dhismeedka xudunta birta ee soosaarayaasha isbeddelka caadiga ah looma farsamayn karo iyaga keligood. Dibadda, oo u dhiganta qaybta leydiga ah ee xarigga birta ee duuban, gariiradda isbeddelka dahaarka aan qaab-dhismeedka lahayn badanaa waxaa sidoo kale laga sameeyaa qaab-dhismeed leydi ah;

5) Heerka deegaanku kuma filna. Waqtigan xaadirka ah, waxaa inta badan laga soo dejiyaa xariijimaha daawaha aan qaab-dhismeedka lahayn ee Hitachi Metals, degsiimaduna si tartiib tartiib ah ayaa loo hirgelinayaa. Shiinaha, Antai Technology iyo Qingdao Yunlu waxay leeyihiin balaadhinta daawaha aan qaab-dhismeedka lahayn (213mm, 170mm iyo 142mm), weli waxaa jira farqi gaar ah oo u dhexeeya waxqabadkeeda iyo xasilloonida xariijimaha la soo dejiyo.

6) Dhererka ugu badan ee xarigga waa xaddidan yahay. Dhererka xarigga dibadda ee ugu badan ee xarigga birta ah ee aan qaab-dhismeedka lahayn ee marxaladda hore sidoo kale aad ayuu u xaddidan yahay sababtoo ah xaddidaadda cabbirka foornada birta ah. Si kastaba ha ahaatee, asal ahaan waa la xalliyay hadda, waxaana la soo saari karaa birta aan qaab-dhismeedka lahayn oo leh dhererka xarigga birta ah ee ugu badan ee 10m. Qaab-dhismeedka xudunta birta ah waxaa loo isticmaali karaa in lagu soo saaro 3150kVA iyo ka hooseeya isbeddelka qalalan ee birta ah ee aan qaab-dhismeedka lahayn iyo 10000kVA iyo ka hooseeya isbeddelka saliidda birta ah ee aan qaab-dhismeedka lahayn.

Iyada oo lagu saleynayo saameynta wanaagsan ee badbaadinta tamarta ee transformers-ka aan qaab-dhismeedka lahayn, oo ay weheliso kor u qaadista ilaalinta tamarta qaranka iyo yaraynta qiiqa iyo taxane siyaasado ah, saamiga suuqa ee transformers-ka aan qaabdhismeedka lahayn ayaa sii kordhaya, marka la eego xarigga aan qaabdhismeedka lahayn (hadda 26.5 yuan) /kg) Qiimaha waa qiyaastii laba jibaar ka badan xaashiyaha birta silikoon ee caadiga ah (30Q120 ama 30Q130), farqiga naxaastana waa mid yar. Marka la eego tayada alaabada shabakadda korontada iyo shuruudaha tartanka, transformers-ka aan qaabdhismeedka lahayn badanaa waxay isticmaalaan conductors naxaas ah. Marka la barbardhigo xaashiyaha birta silikoon ee caadiga ah, farqiga ugu weyn ee transformers-ka aan qaabdhismeedka lahayn waa sida soo socota:

1) Qaab-dhismeedka xudunta nabarka awgeed, qaab-dhismeedka saddex-geesoodka ah ee shan-geesoodka ah waa in loo qaataa nooca xudunta isbeddelka, kaas oo yareyn kara miisaanka xudunta hal-geesoodka ah isla markaana yareyn kara dhibka isu-imaatinka. Qaab-dhismeedka saddex-geesoodka ah ee shan-geesoodka ah iyo qaab-dhismeedka saddex-geesoodka ah ee saddex-geesoodka ah waxay leeyihiin faa'iidooyin iyo khasaarooyin u gaar ah marka loo eego kharashka. , Waqtigan xaadirka ah, soosaarayaasha badankood waxay isticmaalaan qaab-dhismeed saddex-geesoodka ah oo shan-geesoodka ah. Xudunta birta hal-geesoodka ah iyo isu-imaatinka waxaa lagu muujiyay Jaantuska 2:

2) Maadaama qaybta isgoyska ee jirridda ay tahay leydi, si loo ilaaliyo masaafada dahaarka oo isku mid ah, gariiradaha danab sare iyo kuwa hoose ayaa sidoo kale loo sameeyaa qaab dhismeed leydi ah oo u dhigma.

1) Maadaama cufnaanta birlabta ee naqshadda asaasiga ahi ay qiyaastii 25% ka hooseyso tan birlabta caadiga ah ee silicon, isla markaana isku-dhafka dahaarka ee xudunta u ah uu yahay qiyaastii 0.87, taasoo aad uga hooseysa tan birlabta caadiga ah ee silicon ee 0.97, aagga isgoyska ee naqshadiisu waa inuu ka weyn yahay kan birlabta caadiga ah ee silicon. Haddii uu ka weyn yahay 25%, wareegga u dhigma ee gariiradaha danab sare iyo kuwa hoose ayaa sidoo kale si waafaqsan u kordhi doona. Isla mar ahaantaana, waxaa sidoo kale lagama maarmaan ah in la tixgeliyo kororka dhererka wareegyada gariiradda danab sare iyo kuwa hoose. Si loo hubiyo in khasaaraha culayska ee gariiraddu uusan isbeddelin, aagga isgoyska ee fiilada waa inuu sidaas oo kale ahaadaa, maaddada naxaasta ee transformers-ka aan qaabaysnayn waxay qiyaastii 20% ka sarreysaa kuwa transformers-ka caadiga ah.

3. Qalabka Wareegga

Dulmar Guud

Wareegga gudaha ee transformer-ku wuxuu inta badan ka kooban yahay wareegyo (sidoo kale loo yaqaan gariirado). Si toos ah ayuu ugu xiran yahay shabakadda korontada dibadda waana qaybta ugu muhiimsan ee transformer-ka. Wareegga gudaha ee transformer-ku wuxuu badanaa ka samaysan yahay wareegyo silig ah. Fiilooyinka naxaasta ah iyo fiilooyinka aluminiumka waxaa loo qaybiyaa fiilooyin wareegsan, fiilooyin fidsan (kuwaas oo loo sii qaybin karo fiilooyin hal ah, fiilooyin isku dhafan iyo fiilooyin la beddelay), fiilooyin foil ah, iwm. iyadoo loo eegayo qaabka isgoyska ee fiilooyinka. lakabyada, ugu dambayntiina waxay sameeyaan gariiradda guud. Sidaa darteed, walxaha ugu muhiimsan ee wareegga transformer-ku waa naxaas iyo aluminium.

3.1 Isbarbardhigga astaamaha naxaasta iyo aluminiumka

Labada naxaas iyo aluminiumba waa walxo bir ah oo leh koronto wanaagsan, waana qalab si caadi ah loogu isticmaalo sameynta gariiradaha transformer-ka. Kala duwanaanshaha sifooyinka jireed waxaa lagu muujiyay jadwalka soo socda:

3.2 Isbarbardhigga waxqabadka ee fiilooyinka naxaasta-aluminium ee ku jira wareegyada beddelka

Farqiga u dhexeeya transformer-ka naxaasta-aluminium waxaa sidoo kale lagu go'aamiyaa farqiga walxaha, kaas oo ku jira dhinacyada soo socda:

1) Iska caabinta qalabka korontada ku shaqeeya ee naxaasta ah waa qiyaastii 60% oo keliya kan qalabka korontada ku shaqeeya ee aluminiumka. Si loo gaaro shuruudaha luminta iyo kor u kaca heerkulka, aagga isgoyska ee qalabka korontada ku shaqeeya ee la isticmaalayo waa in ka badan 60% ka weyn kan qalabka korontada ku shaqeeya ee naxaasta ah, sidaa darteed awood isku mid ah iyo halbeeg isku mid ah ayaa loo baahan yahay. Mugga qalabka korontada ku shaqeeya ee naxaasta ah ayaa badanaa ka weyn kan qalabka korontada ku shaqeeya ee naxaasta ah, laakiin aagga kulaylka ee qalabka korontada ku shaqeeya ayaa sidoo kale la kordhiyaa waqtigan, sidaas darteed kor u kaca heerkulka saliidda ayaa ka hooseeya;

2) Cufnaanta aluminiumku waa qiyaastii 30% oo keliya tan naxaasta, sidaa darteed transformers-ka qaybinta gudbiyaha aluminiumku way ka fudud yihiin transformers-ka qaybinta gudbiyaha naxaasta;

3) Barta dhalaalka ee qalabka aluminiumku aad ayay uga hooseysaa kan qalabka naxaasta, sidaa darteed xadka heerkulka kor u kaca ee hadda wareegga gaaban waa 250 ℃, kaas oo ka hooseeya 350 ℃ ee qalabka naxaasta. Weyn, sidaas darteed mugga ayaa sidoo kale ka weyn qalabka wax lagu beddelo ee naxaasta;

4) Adkaanta qalabka aluminiumka ayaa hooseysa, sidaa darteed burr-ka dusha sare ayaa si fudud loo baabi'in karaa, marka ka dib marka la sameeyo transformer-ka, suurtagalnimada wareegga gaaban ee u dhexeeya ama wareegga gaaban ee uu keeno burr-ku waa la dhimayaa;

5) Sababtoo ah xoogga yar ee jiidista iyo cadaadiska ee gudbiyaasha aluminiumka iyo xoogga farsamada oo liita, beddelayaasha gudbiyaha aluminiumka ma awoodaan inay si gaaban u shaqeeyaan sida beddelayaasha gudbiyaha naxaasta ah. Xadka cadaadiska ee gudbiyaha waa 1600kg/cm2, awoodda qaadistuna aad ayay u fiicnaatay;

6) Habka alxanka ee u dhexeeya alxanka aluminiumka iyo alxanka naxaasta ah waa mid liita, tayada alxanka ee kala-goyskuna ma aha mid fudud in la dammaanad qaado, taas oo saamayn ku leh kalsoonida alxanka aluminiumka ilaa xad gaar ah.

7) Kulaylka gaarka ah ee gudbiyaha aluminiumku waa 239% kan gudbiyaha naxaasta ah, laakiin marka la eego farqiga cufnaanta iyo cufnaanta korontada ee u dhexeeya labada, farqiga waqtiga kulaylka dhabta ah ee u dhexeeya labada ma aha mid weyn sida farqiga kulaylka gaarka ah. Awoodda xad-dhaafka ah ee muddada gaaban ee beddelayaasha nooca qalalan saameyn yar ayay leedahay.

4. Qalabka dahaarka

Dulmar Guud

Si kastaba ha ahaatee, kalsoonida iyo cimriga adeegga ee transformer-ku waxay si weyn ugu xiran yihiin walxaha dahaarka leh ee la isticmaalo. Agabka dahaarka leh, oo sidoo kale loo yaqaan dielectrics, waa walxo leh iska caabin sare iyo gudbin hoose. Agabka dahaarka leh waxaa loo isticmaali karaa in lagu kala saaro kuwa dahaarka leh ama leh awoodo kala duwan, taasoo u oggolaanaysa hadda inay ku socoto jiho gaar ah. Alaabada dahaarka leh, agabka dahaarka leh waxay sidoo kale ciyaaraan doorka kala-baxa kulaylka, qaboojinta, taageerada, hagaajinta, daminta qaansada, hagaajinta heerka awoodda, iska caabbinta qoyaanka, iska caabbinta caariyaysiga iyo ilaalinta hagaha. Iyada oo la adeegsanayo danabka DC, kaliya hadda aad u yar ayaa dhex mara walxaha dahaarka leh. Iska caabbintiisa (iyadoo la tixraacayo iska caabbinta mugga ee hawada) waa mid aad u sarreeya, guud ahaan 108~1020Ω·cm (iska caabbinta hagaha waa 10-6~10-3Ω·cm, iska caabbinta semiconductor-kuna waa 10-3~108Ω cm).

Maaddada dahaarka leh waxay leedahay iska caabin aad u weyn oo ku wajahan korontada DC. Sababtoo ah iska caabinteeda sare, iyadoo ay ugu wacan tahay ficilka danabka DC, waa mid aan gudbin karin marka laga reebo hadda daadashada dusha sare oo aad u yar; halka ay leedahay awood u yeelashada korontada AC. Korontada sidoo kale guud ahaan waxaa loo arkaa inaysan gudbin karin. Inta ay ka badan tahay iska caabinta maaddada dahaarka leh, ayaa si fiican u sii fiicnaanaysa sifooyinkeeda dahaarka leh.

Agabka dahaarka ayaa loo isticmaalaa transformers-ka si loo kala saaro qaybaha gudbiya midba midka kale ilaa dhulka (awood eber ah). Marka loo isticmaalo taageerooyin kala duwan, waa inay sidoo kale leeyihiin sifooyin farsamo oo wanaagsan. Intaa waxaa dheer, agabka dahaarka ayaa sidoo kale ciyaara doorar kale, sida qaboojinta, hagaajinta, kaydinta tamarta, daminta qaansada, hagaajinta kala-soocidda suurtagalka ah, qoyaan-celinta, caariyaysiga iyo ilaalinta gudbiyaasha.

Caadi ahaan, walxaha dahaarka leh waxay u qaybsan yihiin saddex qaybood:

1) Qalabka dahaarka gaaska: Heerkulka iyo cadaadiska caadiga ah, gaasaska qalalan ee guud waxay leeyihiin sifooyin dahaar wanaagsan, sida hawada, nitrogen, haydarojiin, kaarboon laba ogsaydh, sulfur hexafluoride, iwm. Kuwaas waxaa ka mid ah, hawo iyo sulfur hexafluoride ayaa loo isticmaalaa transformers-ka. Si ballaaran;

2) Walax dareere ah oo dahaaran: Walax dareere ah oo dahaaran badanaa waxay ku jirtaa qaab saliid ah, oo sidoo kale loo yaqaan saliid dahaaran. Sida saliidaha macdanta, saliidaha khudradda, esters-ka macmal ah, iwm.;

3) Alaabada dahaarka adag: sida rinjiga dahaarka leh, xabagta dahaarka leh, warqadda dahaarka leh, kartoonka dahaarka leh, kartoonka jiingada leh, balaastikada korontada iyo filimada, laminates-ka korontada (ulaha, tuubooyinka), resin epoxy oo la shubay, porcelain koronto, caag, alaabta mica, iwm.

4.1 Saliid dahaarka leh

Saliidda dahaarka leh waxaa lagu gartaa xoog koronto oo sarreeya, hillaac sare, baraf yar, heerkulka waxqabadka iyadoo la adeegsanayo oksijiin, heerkul sare iyo goob koronto oo xooggan, aan sun ahayn, aan daxal lahayn, daxal yar, dareere wanaagsan iwm. Waxaa si weyn loogu isticmaalaa alaabada korontada sida transformers-ka, badhanka saliidda, capacitors-ka iyo fiilooyinka, waxayna ciyaartaa doorka dahaarka, qaboojinta, dahaarka iyo buuxinta. Intaa waxaa dheer, waxay sidoo kale ciyaartaa doorka daminta arc-ka ee badhanka saliidda iyo kaydinta tamarta ee capacitors-ka.

Saliidda dahaarka leh waxay ciyaartaa doorka laba-geesoodka ah ee dahaarka iyo qaboojinta ee ku jira isbeddelka isku mar;

Saliidaha dahaarka leh hadda guud ahaan waxaa loo qaybiyaa qaybaha soo socda:

1) Saliid macdan ah: sida saliidda transformer-ka, saliidda switch-ka, saliidda capacitor-ka, saliidda fiilada;

2) Saliid macmal ah: sida dodecylbenzene, saliid silikoon, ester macmal ah, iwm.;

3) Saliid khudradeed;

4.2 Epoxy resin

Resin-ka Epoxy waa isku-dhis polymer ah. Resin-ku waxa lagu gartaa walxo dabiici ah oo adag, nus-adag ama isku-dhafan oo leh cuf molecular ah oo aan la cayimin (badanaa sarreeya), u janjeera inuu qulqulo marka la dareemo cadaadis, badanaa waa nooc jilicsan ama dhalaalaysa, iyo qayb adag oo inta badan soo bandhigta qaab qolof u eg. Waxa uu leeyahay astaamaha aasaasiga ah ee soo socda:

1) Silsiladda molecular-ku aad bay u dheer tahay, silsilad kastaa waxay ka kooban tahay boqollaal ama xitaa tobanaan kun oo atom ah, kuwaas oo si isku xiran isugu xiran;

2) Silsiladda molecular-ka ee dheer waxay ka kooban tahay cutubka ugu yar ee soo noqnoqda, taas oo ah, isku xirka silsiladda, tirada isku xirka silsiladda ee molecule-kana waxaa loo yaqaan heerka polymerization-ka;

3) Awoodda isku-dhafka ah ee macromolecules-ka badanaa waxay ka badan tahay xoogga isku-xidhka kiimikada ee u dhexeeya atamka ku jira molecule-ka, sidaa darteed isku-dhafka polymer-ku wuxuu yeelan karaa taxane astaamo ah: tusaale ahaan, ma jiro polymer gaas ah, habka kala-diridda polymer-ku aad ayuu u gaabis yahay, iwm. Haddii uu jiro isku-xidhka u dhexeeya molecules-ka, Sifadan ayaa xitaa ka sii duwan.

Resin Epoxy waxaa loola jeedaa oligomers oo ka kooban kooxo shaqeynaya epoxy. Resin Epoxy waxay bilaabeen inay soo baxaan 1891. Ka dib 1947, shirkado badan oo ku yaal Mareykanka iyo Switzerland ayaa si guul leh u sameeyay resin bisphenol A epoxy oo warshado ahaan loo sameeyay. Dalkaygu wuxuu bilaabay wax soo saarka 1956.

Sifooyinka dahaarka korontada ee agabka epoxy-ga ayaa si gaar ah u fiican. Marka aan lagu darin buuxinta, EB-ga badeecada la daaweeyay wuxuu ka sarreeyaa 16MV/m, pV-gu wuxuu ka sarreeyaa 1011Ω·m, εr waa 3 ilaa 4, tanδ-na waa qiyaastii 0.002 iyadoo la raacayo inta jeer ee korontada. Sidaa darteed, 20% giraan ah resins oksijiin ayaa loo isticmaalaa dahaarka korontada iyo elektaroonigga ah, sida rinjiga epoxy-ga lagu shubo sida rinjiga dahaarka ee fasalka B, lagu shubo dahaarka stator-ka matoorka yar iyo kan dhexdhexaadka ah; rinjiga aan lahayn dareeraha epoxy-ga ayaa loo isticmaalaa dahaarka faakiyuumka ee dahaarka stator-ka matoorka weyn; laminates-ka (taarikada, tuubooyinka, Ulaha) waxaa loo isticmaalaa sidii godad iyo meelo kala fogeeya matoorada, ulaha hawlgalka badhanka danab sare leh; dhejisyada waxaa loo isticmaalaa isku xirka bushings-ka porcelain-ka korantada ee danab sare leh; castables-ka waxaa loo isticmaalaa go'doominta saxanka ee qalabka korontada ee isku dhafan ee si buuxda u xiran (GIS). Qaybaha sida dahaarka, transformers-ka iyo capacitors-ka dhoobada sare leh. Waqtigan xaadirka ah, magacyada summada ee resins-ka epoxy ama resins-ka epoxy ee wax laga beddelay ee laga soo saaro Shiinaha weli isku mid ma aha waqtigan. Magacyada soosaarayaasha kala duwan ee resin epoxy ee adduunka oo dhan sidoo kale way kala duwan yihiin waxayna u baahan yihiin in lagu aqoonsado astaanta ganacsiga.

Resins-ka Epoxy waa oligomers oo keliya waxaana la isticmaali karaa oo keliya ka dib marka la bogsiiyo. Wakiilka bogsiinta ayaa la falgeli kara resin epoxy si uu isku xidho molecules-ka resin-ka qaab-dhismeed toosan una beddelo qaab-dhismeed badan. Dhiirrigeliyeyaasha/kaaliyayaasha ayaa yareyn kara tamarta kicinta ee falgalka waxayna kor u qaadi karaan/hagaajin karaan habka falgalka jel-ka ee la tuuri karo. Wakiilka bogsiinta wuxuu adeegsadaa haydarojiin firfircoon oo ku jira si uu u sameeyo falgal ku-darid giraan ah oo leh kooxda epoxy-ga firfircoon ee resin-ka si loo gaaro bogsashada. Haydarojiin firfircoon waa -NH2, -NH-, -COOH, -OH iyo -SH ee wakiilka bogsiinta ama dedejinta. ee haydarojiin. Wakiilada bogsiinta ee caadiga ah loo isticmaalo waa amines iyo anhydrides-ka aashitada. Qaar ka mid ah wakiilada bogsiinta waxay u baahan yihiin dardar-geliyeyaal/kaaliyeyaal, qaarkood waxay u baahan yihiin xaalado heerkul sare, qaarna si xoog leh ayay uga fal celin karaan heerkulka hooseeya. Wakiilada bogsiinta ee kala duwan ayaa sidoo kale horseedi doona kala duwanaansho weyn oo ku saabsan sifooyinka alaabada la bogsiiyey, kuwaas oo saameyn weyn ku leh sifooyinka ugu dambeeya ee badeecada. Sidaa darteed, aad ayey muhiim u tahay in la naqshadeeyo oo la doorto wakiilka bogsiinta ee nidaamka qaabaynta resin epoxy.

Dahaarka Epoxy waxaa loo isticmaalaa transformers-ka nooca qalalan waana horumar cusub 40-kii sano ee la soo dhaafay. Cimriga naqshadeynta ee gariiradda transformer-ka ayaa looga baahan yahay inuu gaaro 30 sano, heerka iska caabbinta kulaylkana waa inuu gaaraa heerka F. Way adag tahay in agabka guud uu buuxiyo shuruudaha.

Si taas loo gaaro, waxaa lagama maarmaan ah in la naqshadeeyo, la hagaajiyo, la tijaabiyo lana xaqiijiyo agabka la isticmaalay iyo nidaamyada iyo hababka qaabaynta si loo helo saameynta la rabo. Transformer-ka nooca qalalan ee resin-ka lagu dahaadhay, nidaamka resin epoxy waxaa lagu sameeyaa shubid ama quusid, ka dibna si kulul loo daaweeyaa si loo sameeyo dahaadh gariirad (tusaale ahaan, dahaadh dherer). Inta lagu jiro shaqada oo dhan ee transformer-ka nooca qalalan, dahaadh resin epoxy waa inay sidoo kale hubisaa dahaadh koronto oo gariiradda iyo xoogga farsamada ah, oo ay kala dirtaa kulaylka gudaha gariiradda iyada oo loo marayo gudbinta kulaylka.

Tabar-darradeeda ugu weyn waa cilladaha iyo burburka dahaarka resin-ka oo aan dib loo celin karin iyo kuwa aan dib loo hagaajin karin (guud ahaan cilladaha habka wax soo saarka iyo burburka habka hawlgalka). Sidaa darteed, ka fogaanshaha dildilaaca dahaarka adag, ka fogaanshaha cilladaha shubka, iyo ka fogaanshaha dahaarka qayb ahaan (tusaale ahaan, dahaarka qayb ahaan) ayaa si gaar ah muhiim u ah, waxayna noqdaan furaha tiknoolajiyada wax soo saarka dahaarka adag, waana diiradda tartanka ka dhexeeya soosaarayaasha.

Sababo la xiriira kororka heerkulka sare ee ka dhasha khasaaraha inta lagu jiro hawlgalka qalabka korontada, dahaarka resin-ku wuxuu ku shaqeeyaa heerkul sare muddo dheer (sida qalabka korontada F-class, heerkulka ugu badan ee loogu talagalay guud ahaan waa qiyaastii 140 ℃), qalabka korontadana wuxuu ku jiri karaa heerkul sare ka hor inta aan la hawlgelin iyo inta lagu jiro dayactirka. Heerkulka hooseeya (sida -30 ℃), qalabka korontadana wuxuu ku dhici doonaa shoog koronto oo weyn oo ah shoog koronto sare leh ama wareeg gaaban wakhti kasta. Qalabka korontada ku shaqeeya ee resin-ku dahaaran waa inay awoodaan inay la qabsadaan isbeddelladan, waxayna awoodaan inay u adkeystaan ​​​​ama u adkeystaan ​​shoog koronto-dhaliye ah heerkul aad u sarreeya iyo mid hooseeya. Sidaa darteed, shuruudo aad u adag ayaa lagu dhejiyay sifooyinka kuleylka, farsamada iyo korontada ee nidaamyada dahaarka epoxy.

Hadda waxaa jira laba nooc oo nidaamyo dahaadh ah oo loogu talagalay transformers-ka lagu shubo resin-ka, mid waa "shubka resin saafi ah + xoojinta fiber galaas oo heer sare ah", kan kalena waa "shubka budada resin quartz + xoojinta muraayadda muraayadda ee hore loo diyaariyey".

Nidaamka dahaarka (taas oo ah, qaab-dhismeedka dahaarka caadiga ah) wuxuu daboolayaa goob ka ballaaran nidaamka walxaha dahaarka. Waxay tilmaamaysaa dahaarka qalabka korontada (ama qaybaha madaxbannaan) guud ahaan, oo ay ku jiraan oo keliya agabka dahaarka iyo isku-darka, laakiin sidoo kale dahaarka iyo hagayaasha. Ama xiriirka ka dhexeeya birlabta, xiriirka la leh goobta korontada, xiriirka ka dhexeeya dahaarka iyo deegaanka ku xeeran (gaaska ama dareeraha iyo xaaladihiisa, wasakhowga dusha sare, xaaladaha kala-baxa kulaylka, xoogga farsamada ama shucaaca, iwm.), iwm., iyo la qabsiga xuduudaha hawlgalka ee nidaamka korontada. Socodka hawada iyo kala-baxa kulaylka ee ku jira transformer-ka nooca qalalan, cadaadiska dahaarka, iwm., dhammaantood waxay ku jiraan baaxadda nidaamka dahaarka ee la tixgelinayo.

4.3 Warqad dahaadh ah

Warqadda faybarka dhirta waxaa loo qaybiyaa faybar alwaax ah, faybar cudbi ah iyo faybar hemp ah, kuwaas oo inta badan loo isticmaalo waa warqad saafi ah oo ah faybar alwaax ah oo sulfate ah. Geedka Fir iyo Kuuriya iyo alwaaxyada kale waxay inta badan ka kooban yihiin cellulose, oo ah isku-darka polymer-ka dabiiciga ah. Habka wax-soo-saarka ee warqadda dahaarka leh wuxuu qaataa hab kiimiko ah, sida habka sulfate. Habkan, qaybta ugu weyn ee dareeraha karinta waa sodium sulfide (Na2S). Sodium sulfide waa la shubaa si loo soo saaro sodium hydrogen sulfide iyo sodium hydroxide. Cellulose-ku wuu ka falceliyaa oo wuxuu ku milmaa lye. Dareeraha karinta waa mid khafiif ah, sidaa darteed miisaanka molecular-ka ee cellulose aad ayuu u yareeyaa. Warqadaha dahaarka cellulose-ka dhirta ee si caadi ah loo isticmaalo ee ku jira transformers-ka waa: warqad fiilada korontada, warqad fiilada korontada sare leh iyo warqad dahaarka transformer-ka oo isku-dhafan.

1) Warqadda fiilada: Warqadda fiilada waxaa laga sameeyay saxarka kraft, darajooyinku waa DL08, DL12, DL17, dhumucdooduna waa 0.08mm, 0.12mm iyo 0.17mm, siday u kala horreeyaan, waxaana lagu bixiyaa duub. Ka dib marka warqadda fiilada lagu shubo saliid transformer ah, xooggeeda farsamada iyo xoogga korontada si weyn ayaa loo horumarin doonaa. Tusaale ahaan, xoogga korontada ee warqadda fiilada korontada ee hawada ku jirta waa 6~9×103kV/m, ka dib marka la qalajiyo oo la dhex geliyo saliidda transformer-ka, xoogga korontadu wuxuu gaaraa 70~90×103kV/m. Waxay leedahay xasillooni ku filan oo kuleyl ah waxaana badanaa loo isticmaalaa dahaarka wareegga iyo dahaarka lakabka. Warqadda fiilada waxaa sidoo kale ku jira warqad fiilada danab sare leh, warqad fiilada danab hoose leh, warqad fiilada cufnaanta sare leh iyo warqad crepe ah oo dahaarka leh. Warqadda fiilada danab sare leh waxay ku habboon tahay transformers-ka 110-330kV iyo transformers-ka, oo leh tangent lumis dielectric hooseeya; Warqad fiilada danab yar ayaa loo isticmaalaa dahaarka fiilooyinka korontada iyo transformers-ka ama alaabada kale ee korontada ee 35kV iyo wixii ka hooseeya; warqadda crepe-ka ee dahaarka leh waxaa laga sameeyaa warqad dahaar koronto. Waxaa laga sameeyaa habka laalaabka, waxaana jira laalaabyo jihada isdhaafka ah, kuwaas oo la kala jiido marka la fidiyo. Badanaa waxaa loo isticmaalaa duubista dahaarka transformers-ka saliidda lagu dhex geliyo, sida duubista dahaarka ee meelaha gariiradda, raadadka iyo aaladaha gaashaanka elektrostatic-ka ah; warqadda fiilada cufnaanta sare leh ayaa sidoo kale dahaaraysa Nooc ka mid ah warqadda crepe, xoogga korontadu waa 100% ilaa 150% ka sarreeya warqadda crepe-ka guud, xoogga farsamoyaqaanku waa 50% ka sarreeya, xoogga korontadu waa sarreeyaa, iska caabbinta saliiddu waa wanaagsan tahay, dabacsanaantu waa wanaagsan tahay, waana fududahay in la fidiyo. Waxaa loo isticmaali karaa sidii rasaas halkii laga isticmaali lahaa cajalad la qurxiyey. iyo dahaarka isku xirka fiilada iyo laalaabyada.

2) Warqadda taleefanka: Warqadda taleefanka waxaa sidoo kale laga sameeyay saxarka sulfate, kaas oo si caadi ah loogu isticmaalo fiilooyinka taleefanka. Waxay leedahay awood farsamo oo liidata waxaana guud ahaan loo isticmaalaa dahaarka wareegga, dahaarka lakabka ama dahaarka daboolka ee kontaroolayaasha.

3) Warqadda Kondenser-ka: Warqadda Kondenser-ka waxaa loo qaybiyaa Fasalka A iyo Fasalka B iyadoo loo eegayo shuruudaha isticmaalka. Warqadda Kondenser-ka ee Fasalka A waxaa loo isticmaalaa kondenser-ka biraha ah ee dielectric-ka ee warshadaha elektaroonigga ah. Fasalka B waxaa inta badan loo isticmaalaa sida dielectric interpole ah oo loogu talagalay kondenser-ka awoodda leh. Warqadda Kondenser-ka waxaa lagu gartaa cidhiidhi sare iyo dhumuc khafiif ah. Guud ahaan, kondenser-ka hadda jira badanaa waxay isticmaalaan warqad kondenser ah, kondenser-kana si dhif ah ayaa loo isticmaalaa.

4) Warqad dahaadh ah oo la duubay: Warqadda dahaadh ah ee la duubay ayaa loo isticmaalaa warqad gadaal ah oo loogu talagalay warqadda cabbirka, warqadda cabbirkana waxaa loo isticmaalaa in lagu daboolo dhululubada dahaadh ah (tuubo) iyo gacan-gashiga awoodda, taas oo lagu garto in dhererka nuugista biyuhu uu ka sarreeyo warqadda fiilada oo uu ka hooseeyo Warqadda dahaadh ah. Warqadda la dhejiyay waxaa loo qaybiyaa dhejis hal dhinac ah ama laba dhinac ah (phenolic ama epoxy resin), kaas oo lagu daadiyo heerkul hooseeya. Marka warqadda la dhejiyay loo isticmaalo in lagu sameeyo tuubo warqad ah ama lagu riixo laminate, xabagta ugu dambeyntii way bogsataa marka la kululeeyo oo la cadaadiyo. , Duubku guud ahaan waa cajalad hal dhinac ah, cajaladda la riixayna waa cajalad laba dhinac ah. Intaa waxaa dheer, waxaa sidoo kale jira warqad dheeman ah oo lagu dhejiyay (warqad lagu dhejiyay mesh), taas oo loo isticmaalo dahaadh isku dhafan oo ah duubabka duuban ee saliidda lagu dhex shubay. Ka dib marka la bogsado, waxay hubisaa isku-xidhka u dhexeeya dahaadhyada iyo inta u dhaxaysa dahaadh iyo foil, taasoo xoojinaysa Xoog iyo awood saliid oo wanaagsan.

Warqadda dahaarka ee caadiga ah ee transformer-ka waxaa inta badan loo isticmaalaa warqadda fiilada, warqadda crepe iyo warqadda qaybinta rhombus, kuwaas oo loo isticmaalo transformers-ka sida dahaarka isku-dhafka ah, dahaarka lakabka, xidhitaanka rasaasta, iwm. Caadiyan, qiimaha noocyada kala duwan ee warqadda dahaarka ah ma kala duwana. Aad bay u weynaan doontaa, qiyaastii 20 yuan/kg.

4.4 Agabka isku-dhafka korontada

Filimada khafiifka ah ee korontada iyo walxaha isku-dhafan ee korontada waxay leeyihiin sifooyin dielectric oo aad u fiican waxayna ka tirsan yihiin walxaha dahaarka xaashida khafiifka ah. Filimada korontada waxaa ka mid ah filimka polyester iyo filimka polyimide, kaas oo sidoo kale loo isticmaali karo dahaarka siligga iyo dahaarka lakabka ee transformers-ka. Qalabka isku-dhafan ee korontada waa badeeco isku-dhafan oo laga sameeyay hal dhinac ama laba dhinac oo ka mid ah walxaha fiilada ku xiran filimka, kaas oo loo isticmaali karo dahaarka lakabka ee transformers-ka, gaar ahaan gariiradaha nabarka foil-ka ee qalalan ee la beddelay, gariiradaha danab-yaraanta lehna badanaa waxaa laga sameeyaa walxo isku-dhafan. Ka dib marka lagu daro resin, waxaa loo isticmaalaa dahaarka lakabka dhexdooda. Alaabada isku-dhafan ee caadiga ah ee la isticmaalo waa DMD, GHG iyo wixii la mid ah.

Magaca buuxa ee DMD waa walax jilicsan oo polyester ah oo aan la tolayn, taas oo loo qaybiyay DMD resin hore loo shubay iyo DMD aan hore loo shubin. D) Isku-darka jilicsan ee saddex-lakab ah ee la sameeyay. DMD waxay leedahay dahaadh koronto oo aad u fiican, iska caabin kulaylka iyo xoog farsamo iyo sidoo kale sifooyin dahaadh oo aad u fiican. DMD aan hore loo diyaarin waxaa loo isticmaali karaa dahaadh lakabka ah oo loogu talagalay transformers-ka saliidda lagu shubay, DMD-na waxaa loo isticmaali karaa dahaadh lakabka ah oo loogu talagalay gariiradaha nabarrada foil-ka ee danab hooseeya ee transformers-ka nooca qalalan ee Fasalka F. Tilmaamayaasheeda waxqabadka gaarka ah waxaa lagu muujiyay jadwalka soo socda:

Magaca buuxa ee GHG waa filim polyimide ah oo hore loo shubay oo H-class resin galaas fiber jilicsan ah. Waa walax saddex lakab ah oo jilicsan oo ka samaysan maro galaas fiber ah (G) oo lagu dhejiyay labada dhinac ee filim polyimide ah (H). . Marka la barbardhigo DMD, waxay leedahay iska caabin kulayl oo ka wanaagsan waxaana loo isticmaali karaa dahaarka lakabka ee gariiradaha nabarrada foil-ka ee danab hooseeya ee noocyada H-class ee dahaarka qalalan.

Magaca buuxa ee NHN waa polyimide film polyaramid fiber paper jilicsan oo isku dhafan. NHN hadda waa walaxda ugu khafiifsan ee lakabka khafiifka ah, oo leh iska caabin kulaylka oo aad u fiican, sifooyin dielectric wanaagsan, nuugista biyaha yar iyo iska caabin qoyaan oo aad u fiican. Waxay ka tirsan tahay walaxda dahaarka heerka H waxaana loo isticmaali karaa dahaarka lakabka ee noocyada qalalan ee fasalka H. Xuduudaha waxqabadka gaarka ah waxaa lagu muujiyay jadwalka soo socda:

4.5 Kaarboor dahaadh leh

Looxa waraaqaha dahaarka leh waxaa laga sameeyay warqad saafi ah oo alwaax Kraft ah waxaana loo isticmaali karaa meelaha kala fog ee saliidda, meelaha kala fog ee saliidda, kala-soocayaasha, tuubooyinka kartoonka, warqadda jiingadda leh, dahaarka birta ah ee harqoodyada, dahaarka qabsashada iyo saxamada cadaadiska dahaarka ee loogu talagalay dahaarka keega iwm., dhumucdiisuna guud waa 1.0mm, 1.5mm, 2mm, 3mm, 4mm, 6mm, kartoonka dahaarka leh waxaa loo qaybiyaa kartoon cufnaan yar, kartoon cufnaan dhexdhexaad ah iyo kartoon cufnaan sare leh iyadoo loo eegayo cufnaanta, warqadda cufnaanta yar waxaa badanaa loo yaqaan kartoon jilicsan oo T3 ah, cufnaanta waxay ku jirtaa inta u dhaxaysa 0.75g/cm3 iyo 0.9g/cm3, xooggu waa hooseeyaa, waxaana badanaa loo isticmaalaa in lagu foorariyo qaybaha ama lagu sameeyo qaybo fidsan ka dib qoynta, sida sameynta giraangiraha xagasha, qaybaha wareegsan iyo tuubooyinka warqadda jilicsan. Kaarboorka cufnaanta yar wuxuu leeyahay heer nuugid saliid oo sarreeya, qaab wanaagsan, laakiin sifooyin farsamo oo liita; Kaarboor cufnaan dhexdhexaad ah waxaa badanaa loo yaqaan kaarboor T1, oo leh cufnaan u dhaxaysa 0.95g/cm3 iyo 1.15g/cm3, oo loo isticmaalo sidii suuf joogsi, iwm.; Kaarboor cufnaan sare leh Kaarboor waxaa badanaa loo yaqaan kaarboor T4, oo leh cufnaan ah 1.15g/cm3 ilaa 1.3g/cm3, waxaana loo isticmaalaa sidii tuubo kartoon ah oo dahaar leh, saxan cadaadis dahaar leh iyo giraanta dhammaadka. Qaab-dhismeedka kala-soocidda looxa saliidda oo ka kooban tuubooyin warqad ah oo lakab badan leh oo gariirad koronto sare leh, kaarboor la tolay ayaa sidoo kale loo isticmaali karaa halkii laga isticmaali lahaa struts kartoon si loo sameeyo meelo saliid ah, kuwaas oo badbaadin kara agabyada iyadoo lagu saleynayo hubinta waxqabadka dahaarka.

4.6 Filimka Polypropylene

Filimka polypropylene-ka waxa uu ka samaysan yahay polypropylene resin (PP) oo loo soo saaray xaashi qaro weyn oo loo fidiyay jiho. 0.92g/cm3. 2) Waxa uu leeyahay sifooyin koronto oo wanaagsan iyo xasillooni kiimiko, isku-dhafka dielectric ee qaraabada ah waa 2 ilaa 2.2, cadaadiska burburkuna waa ka weyn yahay 150MV/m; 3) Waxa uu leeyahay sifooyin farsamo oo wanaagsan, xooggiisuna waa ka weyn yahay 100MPa; 4) Waxa loo isticmaali karaa muddo dheer heerkul ah 125 ℃ waxana uu ka tirsan yahay dahaarka E-class; 5) Waxa uu leeyahay hydrophobicity iyo awood nuugis oo xooggan oo ka hortagta biyaha, waxana loo isticmaali karaa dahaarka siligga ee transformers-ka saliidda lagu dhex shubay.

4.7 Other insulating materials

Transformer oil and insulating paper are the main insulating materials for oil-immersed transformer coils. Resin, insulating paper, and composite materials are the main insulating materials for dry-type transformer coils. In addition to these materials, the following insulating materials are also commonly used in transformers: (Laminated wood, laminate, insulating paint, insulating glue, cotton tape, compression tape, no weft tape, etc.

1) Laminate: Electrical laminate is a layered insulating material made of paper, cloth and wooden veneer as the substrate, dipped (or coated) with different adhesives, and hot pressed (or rolled). . According to the requirements of use, the laminated products can be made into products with excellent electrical and mechanical properties, heat resistance, oil resistance, mildew resistance, arc resistance and corona resistance. Laminate products mainly include laminates, laminated wood, laminated tubes, rods, capacitor sleeve cores and other special profiles. The properties of laminates depend on the nature of the substrate and adhesive and the process by which they are formed. According to different raw materials and adhesives, laminates are divided into insulating laminates (paperboard, used for oil change), phenolic laminated paperboard (commonly known as bakelite, paperboard impregnated with phenolic resin, used for oil change), phenolic laminated cloth board (cotton cloth impregnated with phenolic resin, commonly used for oil change), epoxy glass cloth board (glass fiber cloth with epoxy resin as adhesive, can be used for F grade dry change or oil change), modified diphenyl ether glass cloth board (Glass fiber cloth uses modified diphenyl ether resin as adhesive, which can be used for H-level dry change), bismaleimide glass cloth board (glass fiber cloth uses bismaleimide resin as adhesive, Can be used for H-level dry change). Laminates usually have good mechanical strength and insulation properties, and are often used as core clip insulation, external supports, etc. in transformers.

2) Insulation cylinder (tube): The insulation cylinder in the transformer is mainly used between the inner and outer coils, between the coil and the iron core, for the coil lining the skeleton, and the wire is directly wound on the insulation cylinder. At the same time, the insulation cylinder can also be used for the main Insulation, increase the number of oil gaps in the main insulation, and strengthen the insulation. According to the different materials, the insulating tube is generally divided into phenolic paper tube (commonly used for oil change), epoxy glass cloth tube (commonly used for oil change or F grade dry change), modified diphenyl ether glass cloth tube (commonly used for oil change) H-level dry change), glass fiber reinforced plastic cylinder (commonly used in H-level dry change), bismaleimide glass cloth cylinder (commonly used in H-level dry change), etc.

3) Laminated wood: The electrical laminated wood is made of high-quality hardwoods, such as birch, beech, etc. After being cooked twice at 70°C to 80°C, the lignin acid and grease of the wood itself are removed, and then cut into individual pieces of 1 to 3 mm. After drying, it is coated with resin adhesive. After pre-curing, it is repeatedly assembled and stacked. It has good insulating strength and mechanical strength. It can be used as spacer, angle ring, etc. in oil change. .

1) Binding tapes: Transformer binding tapes include cotton tapes, compression tapes, mesh semi-dry non-weft tapes, glass tapes, polyester tapes, etc., which are used for binding and tightening iron cores and coils.

5. Material structure and accessories

In the transformer, there are also structural materials and accessories. The structural materials mainly play the functions of transformer support, magnetic circuit, circuit reinforcement, transformer insulating liquid packaging, etc., including clips, oil tanks, radiators, oil conservators, etc. The main materials are For Q235 steel, non-magnetic steel is often used for the outlet bushing of the fuel tank cover to reduce eddy currents. In addition, non-magnetic steel or high-grade steel is sometimes used inside the transformer body.

Transformer accessories mainly have performance monitoring and protection functions. Dry transformers include thermostats, fans, transformers, etc., and oil transformers include gas relays, thermostats, pressure relief valves, tap switches, etc. Some accessories are required by customers. propose.

Source: Transformer Circle