Kev Tshawb Fawb Txog Kev Tshawb Fawb Txog Kev Tshawb Fawb Txog Kev Tshawb Fawb Txog Kev Tshawb Fawb thiab Kev Tshawb Fawb Txog Kev Tshawb Fawb

Nrog rau kev txhim kho ntawm cov cuab yeej siv hluav taws xob sib xyaw, cov khoom siv hluav taws xob sib xyaw tau nce sai, feem ntau yog ua los ntawm cov roj hmab silicone ua cov khoom siv sheath. Qhov laj thawj tseem ceeb ntawm kev xaiv cov insulators txawv teb chaws yog lawv qhov hnyav thiab tus nqi qis. Nyob rau hauv Suav teb, cov khoom siv insulators tam sim no nyob rau hauv kev ua haujlwm yog tag nrho cov silicone roj hmab insulators, feem ntau yog tsom rau kev daws cov teeb meem kev ua pa phem, uas yog ze rau cov yam ntxwv ntawm cov kab nyiaj siv ua haujlwm hauv Suav teb. Piv nrog cov porcelain los yog iav insulators, cov khoom siv insulators muaj qhov zoo xws li lub zog siab, lub teeb yuag, muaj zog ntub flashover tsis kam, hluav taws xob siab, thiab kev ua haujlwm yooj yim thiab kev saib xyuas.
Cov rwb thaiv tsev sab nraud ntawm cov khoom siv hluav taws xob tau txais cov roj hmab silicone roj hmab, thiab kev laus ntawm cov ntaub ntawv organic yog qhov qis dua ntawm cov khoom siv hluav taws xob los yog iav. Thaum lub sijhawm ua haujlwm, lub kaus thiab cov ntaub qhwv cov ntaub ntawv ntawm cov khoom siv insulators feem ntau pom muaj qhov sib txawv ntawm kev laus, xws li cov cim los yog hluav taws xob corrosion, tawg, tawg, tawg, pulverization, fading, brittleness, thiab hardness. Kev laus hnyav ntawm cov ntaub ntawv rwb thaiv tsev sab nraud yog qhov laj thawj tseem ceeb rau kev tshem tawm lossis hloov ntau yam khoom siv hluav taws xob thaum ntxov.
Txoj kev siv hluav taws xob feem ntau los kuaj xyuas qhov kev laus ntawm cov khoom siv hluav taws xob yog ntsuas lawv qhov hluav taws xob flashover hauv huab. Nws tau tshaj tawm tias qhov kev hloov pauv ntawm cov hluav taws xob kev ua tau zoo ntawm cov khoom siv hluav taws xob ua ntej thiab tom qab kev laus tuaj yeem ntsuas los ntawm kev ntsuas qhov hluav taws xob flashover ntawm cov khoom siv hluav taws xob hauv cov huab cua (nqus pos huab lossis ntsev pos huab).
Hauv chav kuaj thiab ntawm - qhov chaw tshawb fawb, cov dej ntws tawm tam sim no suav tias yog ib qho tseem ceeb rau kev kuaj xyuas cov txheej txheem kev laus ntawm cov insulators. Cov dej xau tam sim no tuaj yeem muab cov ntaub ntawv muaj txiaj ntsig, thiab cov khoom sib haum xeeb ntawm lub waveform tuaj yeem ua lub cim qhia tias cov insulators puas yuav tsum tau ntxuav.
Ob txoj kev ntsuas kev tiv thaiv kev laus saum toj no tau kawm los ntawm macro foundations. Txawm li cas los xij, thaum lub sij hawm kev laus ntawm cov ntaub ntawv rwb thaiv tsev, microstructure ntawm cov khoom siv rwb thaiv tsev yuav hloov. Yog li ntawd, nws yog ib qho tsim nyog los tshuaj xyuas cov txheej txheem kev laus ntawm cov ntaub ntawv rwb thaiv tsev los ntawm kev tsom mus rau microscopic thiab nrhiav txoj hauv kev los ntsuas kev laus ntawm rwb thaiv tsev.
Cov yam tseem ceeb uas ua rau kev laus ntawm cov khoom siv hluav taws xob muaj xws li qhov paug tawm (corona tawm, arc tawm), hluav taws xob ultraviolet, kub, thiab muaj kuab paug. Ntawm lawv, qhov chaw tso tawm muaj qhov cuam tshuam loj rau kev ua haujlwm ntawm cov khoom siv hluav taws xob sib xyaw. Thaum lub zog teb ntawm qhov chaw ntawm lub rwb thaiv tsev nce mus txog 0.5-0.7kV / cm, corona tawm yuav tshwm sim ntawm cov dej ntws ntawm cov khoom insulator. Qhov paug tawm yog qhov tseem ceeb ntawm kev laus ntawm cov khoom siv insulators, suav nrog arc tawm thiab corona paug. Lub mechanism ntawm dielectric degradation puas tshwm sim los ntawm ib nrab tawm yog roughly raws li nram no:
(1) Qhov cuam tshuam ntawm cov khoom siv hluav taws xob tsim tawm los ntawm ib feem ntawm cov roj hmab silicone ua rau cov saw hlau tseem ceeb ntawm cov roj hmab silicone kom tawg, thiab cov polymer depolymerizes los yog ib nrab hloov mus rau hauv cov molecules tsawg;
(2) Cov chaw tsim khoom ntawm post insulators ntseeg hais tias ib feem ntawm qhov paug ua rau qhov kub thiab txias hauv cheeb tsam ntawm lub rwb thaiv tsev, thiab qhov kub siab hauv qhov chaw paug tuaj yeem ua rau cov tshuaj lom neeg ntawm cov khoom siv roj hmab silicone;
(3) Cov oxidation thiab corrosion ntawm cov pa roj carbon monoxide O3, TSIS MUAJ, thiab NO2 tsim los ntawm ib nrab tso tawm maj mam deteriorate cov khoom siv silicone roj hmab; (4) Cov hluav taws xob ultraviolet lossis qhov ntev wavelength X-ray generated los ntawm ib nrab paug ua rau depolymerization thiab decomposition ntawm silicone roj hmab.