Yuav ua li cas los ua ib qho kev soj ntsuam hauv paus rau ntawm qhov ua tsis tau tiav ua ntej PTFE rhaub?

Lub tshuab cua sov PTFE uas yuav tsum kav ntev li 5 xyoos tau ua tsis tiav hauv 6 lub hlis. Qhov no tsis yog ib qho kev hloov pauv nkaus xwb, nws yog qhov paub tsis meej uas yuav tsum tau daws ua ntej tom ntej yuav xaus ib yam nkaus. Txhawm rau nthuav tawm tus neeg tua neeg tiag tiag, koj yuav tsum ua qhov txheej txheem, forensic hauv paus kev kawm. Nws zoo li kev kho mob rau lub tshuab cua sov.

Cov txheej txheem kev tshem tawm yog siv los ua qhov tsim nyog hauv paus kev soj ntsuam ntawm kev tshawb nrhiav PTFE ua tsis tiav ntxov, suav nrog keeb kwm kev ua haujlwm, kev kuaj hluav taws xob, thiab lub cev teardowns.

Kauj Ruam 1: Txheeb xyuas Kev Ua Haujlwm thiab Kev Siv Hluav Taws Xob
Qhov kev ntsuam xyuas yog pib nrog kev ntsuam xyuas tag nrho ntawm cov ntaub ntawv kev khiav hauj lwm yav dhau los. Cov theem no txiav txim siab lub sijhawm thiab tus cwj pwm ntawm qhov ua tsis tiav.

Lub hauv paus ntawm cov ntaub ntawv yog:

Rwb thaiv tsev tsis kam (IR) trend log

Lub sij hawm nyob ntawm qhov xau tam sim no ntsuas

Keeb kwm ntawm setpoint thiab kub tswj

Cov ntawv ceeb toom, cov xwm txheej mus txawv tebchaws thiab cov ntaub ntawv kaw thaum muaj xwm txheej ceev

Los ntawm cov ntaub ntawv no, hom tsis ua haujlwm feem ntau tuaj yeem raug faib ua ob qho tib si;

Slow degradation (qis qis ntawm IR, nce to tam sim no)

Instantaneous Short Circuit lossis Ground Fault Trip (Quick Trip)

Maj mam drift feem ntau yog ib qho kev qhia ntawm tshuaj lom neeg lossis thermal degradation thaum tsis ua hauj lwm tam sim ntawd feem ntau yog qhov tshwm sim ntawm hluav taws xob tawg lossis kev puas tsuaj.

Kev tshuaj xyuas lub cev & Kev kuaj tsis tau
Thaum tshem tawm ntawm kev ua haujlwm, lub tshuab cua sov tau muab cais ua pov thawj pov thawj. Lub tshuab hluav taws xob tuag yog lub txhab nyiaj clue ...

Sab nraud sheath yog xub pom pom nyob rau hauv ib puag ncig tswj lub teeb. Cov duab daws teeb meem siab pom thiab sau qhov tseeb qhov chaw ntawm qhov tsis ua haujlwm.

Cov cuab yeej kuaj mob ua haujlwm nyob rau theem no yog:

Kev pom macro kuaj pom cov tsos mob ntawm qhov kub hnyiab, edema lossis punctures

Tsawg voltage hnub caiv nrhiav kom tau qhov chaw ntawm sheath so

Daim ntawv qhia ntawm thaj chaw ntawm cov xim los yog deformation

Cov txheej txheem no qhia qhov chaw tshwj xeeb ntawm qhov tsis ua haujlwm ua ntej kev txiav tawm sab hauv.

Tswj Disassembly thiab Internal Inspection
Tom qab daim ntawv qhia sab nraud, lub rhaub yog meticulously dismantled kom pom cov qauv sab hauv. Qhib lub plhaub ntawm qhov chaw tsis ua haujlwm. Tshawb xyuas cov khoom sab hauv ib qho los ntawm ib qho.

Kev soj ntsuam ntawm MgO rwb thaiv tsev
MgO qhov teeb meem yog ib qho tseem ceeb tshaj plaws kev kuaj mob cim nyob rau hauv ntxov ntxov ua tsis tau tejyam PTFE rhaub hauv paus ua rau kev soj ntsuam kev tshawb fawb.

Cov kev hloov xim pom tau muab pov thawj ncaj qha ntawm kev ua haujlwm tsis ua haujlwm:

Dawb: Qhuav, tsis muaj paug, thiab hluav taws xob suab

Grey: Tsawg noo noo nkag los yog pib kis kab mob

Dub: Cov hluav taws xob tsis zoo (arc nrhiav, carbonized)

Ntsuab: Chloride corrosion vim tshuaj infiltration

Cov cim xim ua rau koj paub qhov txawv ntawm hluav taws xob tawg, tshuaj permeation lossis ya raws incursion.

Kev ntsuam xyuas ntawm Cov Cuab Yeej Hluav Taws Xob
Tom qab ntawd qhov tawg morphology ntawm cov hlau tsis kam yog kawm. Cov ntaub ntawv pov thawj tuaj yeem yog:

Mechanical overload; ntxuav so hauv nro

Thermal overstress qhia los ntawm caj dab lossis thinning

overheated los yog qhuav - raug rho tawm haujlwm uas yog sib npaug los yog yaj

Hluav taws xob tawm tshwm sim - cov cim qhia ntawm arc yaig

Rau kev soj ntsuam kom ntxaws, lub stereomicroscope feem ntau yog ua haujlwm, thiab cov kev hloov pauv ntawm cov pob txha pob txha tuaj yeem raug soj ntsuam los ntawm kev tshuaj ntsuam xyuas electron microscopy (SEM) kom paub meej tias hom tsis ua haujlwm.

Kev tshuaj xyuas ntawm qhov chaw nkag thiab Terminal Foob
Qhov chaw davhlau ya nyob twg yog qhov ua tsis tau zoo hauv PTFE cov cua sov. Kev tshuaj xyuas muaj xws li:

Cov ntaub ntawv pov thawj ntawm cov dej infiltration, cov xwm txheej ntawm kev foob

Carbon taug qab ntawm kev sib txuas hluav taws xob

Mechanical strain ntawm qhov chaw nkag cable.

Cov pov thawj ntawm thermal deterioration ntawm kev sib txuas ntawm kev txiav

Kev ua tsis tiav ntawm lub hauv paus chiv keeb feem ntau qhia tau hais tias muaj kev ntxhov siab ntawm kev siv tshuab, faulty installation lossis tsis ua haujlwm ntawm ib puag ncig sealing.

Failure Mode Classification
Tom qab tag nrho cov ntaub ntawv tau sau tseg, qhov ua tsis tiav tau muab faib ua ib qho tseem ceeb hauv paus ntsiab lus:

Hluav taws xob tsis ua hauj lwm: dielectric breakdown, arcing, los yog rwb thaiv tsev tsis ua hauj lwm

Tshuaj tsis ua hauj lwm: acid nkag mus, ua phem los ntawm chloride los yog MgO paug

Mechanical tsis ua hauj lwm: kev co los yog installation kev ntxhov siab qaug zog

Thermal tsis ua hauj lwm, qhuav hluav taws, overheat, watt ceev tshaj

Qhov kev faib tawm no tso cai rau kev kho kom raug ncaj qha rau qhov pib qhov tseeb.

Tsim Kho Kev Ua Haujlwm
Cov kauj ruam kho yuav suav nrog, raws li lub hauv paus txiav txim siab:

Kev txo qis ntawm watt ntom kom txo cov thermal stress

Kev xaiv ntawm lwm cov ntaub ntawv sheath rau tshuaj tiv thaiv

Txhim kho qib kev paub lossis qhuav - cov tshuab tiv thaiv hluav taws

Txhim kho sealing tsim ntawm lub davhlau ya nyob twg connectors

• Hloov kho cov ncua sij hawm saib xyuas lossis tshuaj xyuas cov txheej txheem

Txhua qhov kev pom zoo yog tsim los ntawm cov pov thawj tsis ua haujlwm, tsis yog kev xav.

Xaus.
A failed heater is not scrap. It is a concentrated source of operations intelligence. A structured root cause analysis of a failed PTFE heater process is a premature failure event that translates into a detailed engineering dataset for future design and operational improvements.

Ib txoj hauv kev forensic txoj kev lav tias tib yam tsis ua haujlwm tsis rov tshwm sim nyob rau hauv tib lub sijhawm. Qhov tsis ua haujlwm kim tshaj plaws yog qhov uas tau tso cai rov tshwm sim dua, ua rau hauv paus ua rau kev tsom xam ib qho kev nqis peev tseem ceeb nyob rau hauv ntev - lub sij hawm kev ntseeg siab thiab txheej txheem kev ruaj ntseg.