Kev pabcuam lub neej ntawm thermocouples yog cuam tshuam nrog lawv cov degradation

Lub neej ntev ntawm cov thermocouples muaj feem xyuam rau lawv cov degradation, uas yog hais txog qhov tshwm sim ntawm kev laus thiab degeneration ntawm thermocouples tom qab siv. Thermocouples ua los ntawm cov hlau los yog alloys muaj cov nplej sab hauv uas maj mam loj hlob ntawm qhov kub thiab txias. Nyob rau tib lub sijhawm, cov hlau muaj me me ntawm impurities, thiab nws txoj kev taw qhia lossis cov duab yuav hloov pauv, thiab nws tseem yuav cuam tshuam rau kev rov qab los lossis oxidizing gases nyob ib puag ncig. Nrog rau cov kev hloov pauv saum toj no, lub tshuab hluav taws xob hluav taws xob hluav taws xob ntawm lub thermocouple kuj yuav raug hloov pauv tsis tshua muaj siab. Yog li ntawd, qhov degradation ntawm thermocouples yog inevitable.
Kev pab lub neej ntawm thermocouples
Kev degradation ntawm thermocouples yog ib qho txheej txheem zoo uas nyuaj rau kev txheeb xyuas. Nws yuav txawv nyob ntawm seb hom, txoj kab uas hla, kev khiav hauj lwm kub, cua, thiab lub sij hawm ntawm lub thermocouple. Lub neej kev pab cuam ntawm lub thermocouple yog hais txog lub sijhawm thaum qhov kev puas tsuaj ntawm cov thermocouple ntau dhau qhov kev tso cai yuam kev, thiab txawm tias cov hlau tawg thiab siv tsis tau.
(1) Lub neej ntev ntawm cov thermocouples sib dhos
Hauv kev siv tswv yim, cov thermocouples sib sau ua ke feem ntau muaj cov kav dej tu thiab tsuas yog siv cov hlau liab qab hauv qhov xwm txheej tshwj xeeb. Yog li ntawd, nyob rau hauv feem ntau, lub lifespan ntawm lub tu tube txiav txim lub lifespan ntawm lub thermocouple. Kev ntxub ntxaug ntawm kev siv lub neej ntawm cov thermocouples yuav tsum tau ua tiav los ntawm kev sau mus ntev thiab khaws cov ntaub ntawv raws li kev siv tau zoo, txhawm rau muab cov txiaj ntsig raug ntau dua.
(2) Lub neej ntev ntawm armored thermocouples
Vim lub rwb thaiv tsev ntawm armored thermocouples thiab ib puag ncig sab nraud, cov khoom siv raw ntawm lub casing muaj qhov cuam tshuam loj rau lub neej ntawm armored thermocouples. Nws yog ib qho tsim nyog los xaiv cov thermocouple xov hlau thiab hlau casings raws li lawv siv. Thaum cov khoom siv raw raug xaiv, lawv lub neej yuav nce nrog qhov nce ntawm txoj kab uas hla ntawm armored thermocouple. Piv nrog cov thermocouples sib dhos, armored thermocouples muaj ntau qhov zoo, tab sis lawv lub neej feem ntau qis dua.
Thermocouples feem ntau yog siv cov ntsuas kub ntsuas hauv kev tshawb fawb thiab kev tsim khoom. Txawm hais tias lawv cov qauv yog qhov yooj yim, kev siv tsis siv neeg tseem tuaj yeem ua rau muaj kev ntsuas tsis raug. Tus sau piav qhia txog kev xaiv cov ntsiab lus ntsuas kub, qhov tob ntawm kev nkag mus, lub sijhawm teb, thermal tawg, thiab thermal impedance ntawm thermocouples, nrog rau cov laj thawj tseem ceeb ntawm kev ua yuam kev hauv kev siv cov teeb meem yooj yim. Nws kuj tseem qhia txog kev ceev faj hauv kev siv cov thermocouples, xws li heterogeneity, kev khiav hauj lwm huab cua, rwb thaiv tsev tsis kam, xaiv oxidation ntawm K-hom thermocouples, K mob, thiab shunt yuam kev ntawm armored thermocouples. Nws muaj txiaj ntsig zoo rau kev txhim kho kev ntsuas qhov tseeb thiab txuas ntxiv lub neej ntawm cov thermocouples.