Tam sim no, feem ntau sivRwb thaiv tsev ntaubRau DC cables yog polyethylene. Txawm li cas los xij, cov kws tshawb nrhiav tau tshawb nrhiav cov ntaub ntawv rwb thaiv tsev ntau ntxiv, xws li polypropylene (PP). Txawm li cas los xij, siv pp ua cable rwb thaiv tsev khoom nthuav qhia ntau yam teeb meem.
1. Cov Khoom Siv Neeg Kho Tshuab
Txhawm rau kom tau raws li qhov yooj yim yuav tsum muaj rau kev thauj mus los, cov khoom siv rwb thaiv tsev yuav tsum muaj zog, muaj kev sib tw tsis zoo, thiab cov kev cuam tshuam kub tsis kam. Txawm li cas los xij, pp, raws li lub tshuab ua kom huv, ua pov thawj rigidity nyob rau hauv nws txoj haujlwm ua haujlwm. Ib qho ntxiv, nws qhia brittleness thiab kev raug tawg kom tawg hauv qhov chaw tsawg-qhov chaw ib puag ncig, tsis muaj raws li cov xwm txheej no. Yog li ntawd, kev tshawb fawb yuav tsum tsom rau kev nruj thiab hloov kho PP los daws cov teeb meem no.
2. Cov laus tsis kam
Thaum siv tau ntev, dc cable rwburing elevasion muaj hnub nyoog vim kev sib xyaw ua ke ntawm kev siv hluav taws xob siab thiab thermal cycling. Qhov kev laus no ua rau txo qis kev txo qis hauv cov tshuab thiab cov rwb thaiv tsev thaum kawg ua rau muaj lub zog tawg, lub neej ntawm lub neej. Cable rwb thaiv tsev laus suav nrog kev siv hluav taws xob, hluav taws xob, thermal, thiab hluav taws xob ua haujlwm, nrog rau kev laus hluavtaws thiab thermal ua qhov kev sib tw tshaj plaws. Txawm hais tias ntxiv cov tshuaj tua kab mob antioxidants tuaj yeem txhim kho PP lub zog tiv thaiv kev kub ntxhov thiab pigration, thiab lawv impurity raws li kev ntxiv pp lub rwb thaiv tsev ua haujlwm. Yog li ntawd, tsuas yog cia siab rau cov tshuaj tua kab mob antioxidants los txhim kho PP cov laus tsis tuaj yeem ntsib DC cable rwb thaiv tsev, kev tshawb fawb ntxiv rau kev hloov kho pp.
3. Rwb thaiv tsev ua haujlwm
Chaw nqi xwb, raws li ib qho ntawm cov yam cuam tshuam rau kev ua tau zoo thiab muaj sia ntawmHigh-voltage DC cables, Cuam tshuam cuam tshuam ntau lub zos hluav taws xob muab faib, dielectric zog, thiab rwb thaiv tsev cov khoom ua haujlwm laus. Cov ntaub ntawv Rwb thaiv tsev rau DC Cables yuav tsum tau los txhawm rau txhawm rau txhawm rau them cov nqi hluav taws xob, thiab cuam tshuam rau cov chaw muaj hluav taws xob tsis zoo, thiab cuam tshuam rau cov kev sib tw hluav taws xob tsis zoo li qub, ua kom lub zog tsis haum thiab siv sia cable.
Thaum DC cables nyob hauv unipolar hluav taws xob teb rau ncua sijhawm, cov tshuab hluav taws xob, thiab cov tshuab hluav taws xob, thiab cov tshuab hluav taws xob, thiab cov tshuab hluav taws xob tau tsim nyob rau hauv cov khoom rwb thaiv tsev ua chaw. Cov nqi no tau them sai sai thiab kev khaws mus ua haujlwm rau pob, paub tias yog kev txuam nrog ntawm chaw them nyiaj. Yog li ntawd, thaum siv PP hauv DC cov cable, kev hloov kho yog qhov tsim nyog los txhawm rau txhawb nqa tus nqi them thiab tsub zuj zuj.
4. Thermal conductivity
Vim tias txom nyem thermal conductivity, kub tsim thaum lub sijhawm ua haujlwm ntawm PP-based DC cables tsis tuaj yeem tsis txaus siab txheej thiab sab nraud txheej kub, ua rau kub tsis sib xws. Cov hluav taws xob cuam tshuam ntawm cov khoom siv polymer nce nrog kev nce siab kub. Yog li ntawd, sab nraud ntawm cov txheej txheem rwb thaiv tsev uas muaj kev coj ua qis dua ua tus nqi tsub zuj zuj ntxiv kev siv hluav taws xob. Ntxiv mus, qhov kub thiab txias rau kev txhaj tshuaj thiab tsiv teb tsaws chaw ntawm ntau qhov chaw them, txuas ntxiv hluav taws xob hauv hluav taws xob. Qhov ntau dua qhov ntsuas kub thiab txias, ntau qhov chaw them tsub ntxiv tshwm sim, ua kom hluav taws xob teb distortion. Raws li tau sib tham tau ua ntej lawm, kub them tsub zuj zuj, thiab hluav taws xob sib tw cuam tshuam rau kev ua haujlwm ib txwm muaj thiab lub neej ntawm DC cables. Li no, txhim kho lub thermal conductivity ntawm PP yog qhov tsim nyog yuav tsum ua kom muaj kev nyab xeeb ua haujlwm thiab lub neej ntev ntawm DC cable.
Lub Sijhawm Post: Jan-04-2024