Ua rau thiab cov yam ntxwv ntawm qhov siab ntawm tus kheej tawg ntawm iav insulator

1 、 Tus kheej tawg mechanism ntawm tempered iav

Lub iav insulator yog tempered iav, uas yog tus cwj pwm los ntawm compressive kev nyuaj siab ntawm qhov chaw thiab tensile kev nyuaj siab nyob rau hauv, raws li qhia nyob rau hauv daim duab.

Kev ntxhov siab stratification ntawm tempered iav

Kev ntxhov siab ntawm iav yog tshwm sim los ntawm qhov kub thiab txias hloov hauv kev ua iav.Thaum cov iav uas tau muab tso rau hauv qhov kub thiab txias (760 ~ 780 ℃) txias sai, lub zog quench ntawm txheej txheej shrinks, tab sis qhov kub thiab txias sab hauv yog tseem nyob rau hauv lub expansion xeev, uas ua rau muaj kev cuam tshuam ntawm lub shrinkage. ntawm txheej txheej thiab compressive kev nyuaj siab nyob rau hauv lub nto txheej;Tom qab ntawd qhov kub thiab txias sab hauv yuav txo qis thiab pib ntsws, tab sis lub sijhawm no, txheej txheej saum npoo tau hardened, ua rau sab hauv shrinkage thaiv thiab tensile stress.Ob hom kev ntxhov siab no tau muab faib ua cov iav kom txog thaum lawv txias tag thiab qhov kub thiab txias ploj mus, uas yog kev ntxhov siab tas mus li.

Thaum qhov sib npaug ntawm nruab nrab ntawm kev ntxhov siab thiab tensile kev ntxhov siab ntawm cov iav insulator iav raug rhuav tshem, cov kab nrib pleb yuav tshwm sim sai sai nyob rau hauv qhov kev txiav txim ntawm kev ntxhov siab, uas yuav ua rau crushing iav, uas yog, nws tus kheej tawg.

2, Ua rau thiab cov yam ntxwv ntawm tus kheej tawg

Qhov ua rau ntawm iav insulator nws tus kheej tawg tuaj yeem muab faib ua ob pawg: cov khoom lag luam zoo thiab qhov chaw ua haujlwm sab nraud.Hauv qhov tseeb, feem ntau muaj ob qho laj thawj tib lub sijhawm.

a.Yog vim li cas rau cov khoom zoo

Lub ntsiab yog vim li cas yog hais tias muaj impurity hais nyob rau hauv lub iav insulator, thiab feem ntau yog nis hais.Lub sijhawm hloov pauv ntawm NIS hauv cov txheej txheem ntawm iav melting thiab annealing tsis tiav.Tom qab cov insulator tau muab tso rau hauv kev ua haujlwm, nws tau txiav txim siab tias qhov kev hloov pauv theem thiab nthuav dav tshwm sim maj mam, ua rau cov kab nrib pleb hauv iav.Thaum lub cheeb ntawm particle impurities tsawg tshaj li ib tug nqi, nws yuav tsis raug tshem tawm los ntawm txias thiab kub poob siab, ua rau nws tus kheej siab heev tawg tus nqi ntawm insulators nyob rau hauv lub lag luam [kev tshuaj xyuas ntawm centralized nws tus kheej tawg ntawm tempered iav insulators ntawm 500kV kis kab mob Xie Hongping].Thaum cov impurity hais nyob rau hauv lub puab tensile kev nyuaj siab txheej ntawm iav, qhov tshwm sim ntawm tus kheej tawg yog ntau dua.Vim tias iav nws tus kheej yog cov khoom siv tawv tawv, uas tiv taus siab tab sis tsis tensile, feem ntau ntawm cov iav tawg yog tshwm sim los ntawm tensile stress.

yam ntxwv:

Ib qho kev tawg ntawm tus kheej los ntawm cov khoom hauv impurity yog siab dua peb xyoos ua ntej kev ua haujlwm, thiab yuav maj mam txo tom qab ntawd, uas yog ib txoj cai tseem ceeb los txiav txim qhov ua rau ntawm tus kheej tawg.

B) qhov tshwm sim ntawm tus kheej tawg ntawm qhov sib txawv ntawm cov hlua insulator yog tib yam;

b.Sab nraud ua rau

Feem ntau muaj kuab paug thiab qhov kub thiab txias hloov pauv.Nyob rau tib lub sijhawm ntawm kev ua qias tuaj, noo noo thiab hluav taws xob, cov dej ntws tawm ntawm cov khoom siv hluav taws xob loj dhau, ua rau ib feem ntawm txoj siv tawv qhuav.Thaum cov huab cua tawg tshwm sim ntawm txoj siv tawv qhuav, cov khoom tsim tawm yuav ua rau lub kaus mom lub kaus, thiab thaum lub qhov tob tob tob, nws yuav ua rau nws tus kheej tawg.Yog hais tias lub insulator raug ntaus los ntawm xob laim thaum lub sij hawm cov txheej txheem saum toj no, tus kheej tawg qhov tshwm sim ntawm iav insulator uas tau eroded los ntawm arc yuav nce ho.Cov fouling ntau dhau yog qhov tseem ceeb, uas tej zaum yuav yog vim muaj ntsev ntau dhau los yog ntau cov hmoov hlau hmoov hauv cov fouling.

yam ntxwv:

A) Nws yog qhov ua tau tias qhov tawg ntawm tus kheej tsis pom tseeb hauv thawj ob peb xyoos ntawm kev ua haujlwm, tab sis tshwm sim ntau lub sijhawm tom qab ob peb xyoos ntawm kev ua haujlwm (kev hloov pauv loj hauv cov pa phem hauv zos ua rau muaj kuab paug ntau dhau);

B) qhov tshwm sim ntawm qhov tawg ntawm tus kheej ntawm high-voltage kawg thiab qis-voltage kawg ntawm cov hlua insulator yog ntau dua li qhov nruab nrab (qhov hluav taws xob ntawm qhov kawg-voltage kawg thiab qis-voltage kawg yog qhov muaj zog, thiab lub zos creepage tshwm sim. ua ntej ntawm cov hlau ko taw ntawm lub insulator thaum muaj kuab paug hnyav heev);

C) steel ceg ntawm cov tsis yog tus kheej exploding insulator nyob rau hauv tib lub pej thuam yog puas (lub zos arc tshwm sim los ntawm ntau cov pa phem tsub zuj zuj ua rau puas lub iav nyob ze ntawm lub steel ceg), thiab muaj zoo tawg nyob rau hauv lub kaus nto;

iav puas nyob ze steel ko taw

3 、 Residual rauj tsom xam

Tom qab tus kheej tawg ntawm tempered iav insulator, lub kaus disc iav yog tawg thiab tawg mus rau hauv ib tug residual rauj.Cov iav zoo li ntawm qhov seem rauj tuaj yeem muab kev pabcuam rau kev txheeb xyuas qhov ua rau ntawm tus kheej tawg.Cov duab thiab hom residual rauj iav:

a.Radial

Rau qhov tawg ntawm tus kheej los ntawm ib qho tsis xws luag, qhov pib taw tes tuaj yeem pom los ntawm kev rov qab tshawb nrhiav qhov tawg.Yog hais tias lub iav tawg slag rau ntawm qhov seem rauj yog nyob rau hauv cov duab hluav taws xob, nws qhov tawg pib taw tes, uas yog, qhov pib ntawm nws tus kheej tawg, yog nyob rau ntawm lub taub hau ntawm daim iav.Nyob rau hauv cov ntaub ntawv no, tus kheej tawg yog tshwm sim los ntawm qhov zoo ntawm cov iav daim nws tus kheej, xws li batching, dissolution txheej txheem, thiab lwm yam.

Residual rauj radial

b.Ntses scaly

Yog hais tias cov iav tawg ntawm cov rauj seem nyob rau hauv cov duab ntawm cov nplais ntses, thiab qhov pib ntawm nws tus kheej tawg yog nyob ze rau hauv qab ntawm iav qhov ze ntawm lub hau hlau, muaj ob qho ua rau nws tus kheej tawg nyob rau hauv cov ntaub ntawv no. yog, cov iav tawg vim yog qhov tawg ntawm tus kheej ntawm cov khoom nws tus kheej tsis xws luag lossis sab nraud quab yuam, uas tuaj yeem ua rau cov neeg kho tshuab kev ntxhov siab lossis kev ntxhov siab ntawm hluav taws xob, xws li hluav taws xob hluav taws xob tsis tu ncua, qhov tawg ntawm iav qhov chaw tshwm sim los ntawm lub zog zaus loj tam sim no thiab tsis sib xws. tam sim no, etc.

Residual rauj ntses nplai

c.Mixed

Yog hais tias cov iav tawg slag ntawm cov seem rauj muaj nyob rau hauv ob qho tib si ntses nplai thiab cov duab zoo, qhov pib ntawm tus kheej tawg yog nyob ntawm lub kaus daim tiab ntawm daim iav.Hauv qhov no, qhov tawg ntawm tus kheej tuaj yeem tshwm sim los ntawm ob qho tib si sab hauv thiab sab nraud.

Residual rauj mixed hom

4. Kev tiv thaiv

a.Kev tswj xyuas kev nkag mus: qhov zoo ntawm cov iav insulators yog tswj los ntawm kev kuaj xyuas cov khoom puas thiab cov yoj yoj kev ua tau zoo.

b.Composite insulators yog siv rau hauv qhov chaw muaj kuab heev.Yog tias nws tau txiav txim siab tias qhov kev tawg ntawm qhov nruab nrab ntawm tus kheej yog tshwm sim los ntawm cov pa phem ntau dhau, cov khoom siv insulators tuaj yeem siv los hloov cov iav insulators.

c.Txhim khu kev soj ntsuam xyuas, thiab ua kev saib xyuas tshwj xeeb ntawm cov kab sib kis hauv lub sijhawm tom qab huab cua phem xws li xob laim tawm tsam.

d.Ua tib zoo saib xyuas kev thauj mus los.Thaum lub sij hawm tsim kho vaj tse thiab kho thaum muaj xwm txheej ceev, lub iav tempered insulator yuav tsum tau tiv thaiv los ntawm cov khoom tiv thaiv kom tsis txhob muaj kev puas tsuaj.

Tam sim no, kev tswj cov iav insulators zoo hauv cov tuam txhab loj hauv tsev yog qhov zoo, thiab nws tsis tas yuav siv cov iav insulators tau hais yav dhau los tom qab sawv ntsug rau ib nrab xyoo.