Yuav Ua Li Cas Txhim Kho Kev Laus Resistance ntawm Silicone Rubber Composite Insulators
Txoj hauv kev tseem ceeb los txhim kho kev laus tiv thaiv ntawm silicone roj hmab insulators yog nyob rau hauv "kev ua kom qeeb ntawm peb hom chains" - Si-O lub ntsiab saw, methyl sab chains, thiab muab tub lim interfaces. Cov kev tshawb fawb tsis ntev los no tau sau cov kev ntsuas kev txhim kho rau hauv "4 theem thiab 12 txoj kev tshwj xeeb", tag nrho cov no tau raug txheeb xyuas los ntawm kev kuaj kev laus sai xws li damp- cua sov, ntsev tsuag, thiab ultraviolet raug, thiab npaj rau kev siv ncaj qha:
Molecular Structure "Kev txhaj tshuaj" ua ntej
① Qhia Phenyl Pawg rau hauv Cov Ntsiab Lus: Hloov cov pa roj hmab methyl vinyl silicone roj hmab nrog methyl vinyl phenyl silicone roj hmab. Lub steric hindrance ntawm phenyl pawg inhibits qhov rearrangement thiab cyclic degradation ntawm Si-O daim ntawv cog lus, txo cov thermal poob ntau tshaj 30% ntawm 250℃thiab ob npaug rau lub neej kev pab cuam kwv yees.
② Graft Epoxy pawg mus rau Side Chains: Tom qab grafting nrog glycidyl methacrylate, hla -txuas "cov ntsiab lus thauj tog rau nkoj" yog tsim. Qhov no txo cov methyl pab pawg noj nyob rau hauv ultraviolet - ozone raug thiab txo cov hydrophobicity degradation tus nqi los ntawm 40%.
"Armoring" Filler Interfaces
③ Nano-Micron Synergistic Effect: Muab 5 phr ntawm nano- silicon dioxide (SiO₂) nrog 45 phr ntawm micro- txhuas hydroxide (Al(OH)₃). Nano-particles nyiam tsiv mus nyob rau saum npoo, tsim ib txheej ntom ntom inorganic. Tom qab 1000 teev ntawm ntsev tsuag kev laus, lub kaum sab xis ntawm kev sib cuag tseem nyob siab dua 100 degree, thiab lub flashover voltage tuav tus nqi siab tshaj 90%.
④ Hloov Ib Feem Al(OH)₃ nrog Magnesium Hydroxide: Magnesium hydroxide (Mg(OH)₂) nta qhov kub thiab txias dua thiab muaj peev xwm ua kom tsis muaj kua qaub. Nyob rau hauv tib lub ntsev tsuag tshuaj ntsuam tej yam kev mob, lub nto tawg ceev yog txo los ntawm 50%.
⑤ Hauv -Situ Ua kom cov Fillers: Txais kev sib xyaw ua ke "kev ua kom zoo dua- txheej" rau Al(OH) ₃ siv lub tshuab dav hlau ultrasonic ua ke nrog silane additive Z-6173. Cov khoom muab tub lim tau muaj qhov me me ntawm 0.5 µm thiab qhov chaw grafting ntau tshaj 6%. Tom qab 5000 xuab moos ntawm kev laus, tsis muaj kev ua kom dawb los yog chalking, thiab lub zog tensile tuav tau nce los ntawm 25%.
"Secondary Cross-linking" hauv Formulation and Process
⑥ Dual Vulcanization nrog Peroxide thiab Platinum Catalysis: Ua ntej ua kom siab -kub peroxide cross- txuas, tom qab ntawd los ntawm platinum-catalyzed ntxiv hla- txuas ntawm 120℃. Qhov no ua rau tus ntoo khaub lig- txuas qhov ceev los ntawm 15%, txo cov thermal elongation los ntawm 30%, thiab ua ob npaug rau lub sij hawm rau ultraviolet-induced tawg pib.
⑦ Electron Beam Irradiation rau "Micro-cross-linking": Qhia ntxiv C-C cross- txuas cov ntawv cog lus nrog cov koob tshuaj 60 kGy. Tom qab 1000 teev ntawm kev laus tag nrho, lub zog tensile tuav tau nce los ntawm 70% mus rau 85%, uas yuav luag tsis muaj kev cuam tshuam rau hydrophobicity.
"Repairable" Kev khiav hauj lwm thiab kev tu
⑧ Hauv -situ Re- txheej ntawm RTV ntawm Qhov Nto: Thaum cov polymer insulator aging ncav cuag HC Class 5, tshuaj tsuag chav 0.3 hli tuab - kub vulcanized (RTV) silicone roj hmab txheej. Qhov no rov ua dua lub kaum sab xis rau HC Chav Kawm 1-2, txo cov xau tam sim no mus rau 1/30 ntawm nws tus nqi qub, thiab txuas ntxiv lub neej kev pabcuam insulator los ntawm 5-7 xyoo.
⑨ Ntawm -Kev Saib Xyuas thiab Kev Pabcuam Lub Neej Kev Ua Haujlwm: Tsim kom muaj qhov "aging Performance index" raws li cov dej xau tam sim no harmonics thiab ultraviolet imaging rau kev siv cov xwm txheej-raws li kev saib xyuas, zam "dhau- tu" lossis "hauv- tu".
Kev ntsuas kev ntsuas ①–⑦ rau hauv cov roj hmab sib xyaw ua ke thiab kev ntsuas ⑧–⑨ rau hauv kev ua haujlwm thiab kev tswj xyuas cov cai tuaj yeem txo qhov kev laus ntawm cov khoom siv insulators los ntawm ntau dua 50% nyob rau hauv ib puag ncig hnyav nrog cua sov, tshuaj tsuag ntsev, thiab cov hluav taws xob ultraviolet. Lub neej kev pab cuam yuav tsum tau txuas ntxiv los ntawm 15 xyoo mus rau 25-30 xyoo, uas tau raug batch- txheeb xyuas ntawm cov kab xa hluav taws xob hauv Xinjiang thiab thaj chaw ntug dej hiav txwv.