Kev Ntsuas Tus Nqi Them Nqi: Cov Nyiaj Them Nqi Thermocouple vs. Premium, Tshaj 5 Xyoo

Ntau tus neeg yuav khoom lean rau pob nyiaj siv thermocouples thaum muab khoom rau cov tshuab cua sov, xav tias tus nqi qis dua yog tus nqi zoo dua. Qhov no ua rau kev nkag siab thaum pib- pob nyiaj siv nruj thiab kev txuag nqi tam sim yog qhov tseem ceeb tshaj plaws. Tab sis raws li kev paub dhau los, kev tsom mus rau tus nqi yuav khoom feem ntau ua rau cov nuj nqis ntau dua lub sijhawm. Thaum ntsuam xyuas cov kev xaiv thermocouple, 5-xyoo lub neej kev txheeb xyuas tus nqi qhia txog qhov sib txawv ntawm cov peev nyiaj thiab cov qauv hwm.

Thermocouples ua haujlwm los ntawm kev tsim cov hluav taws xob me me uas sib npaug rau qhov sib txawv ntawm qhov kub thiab txias ntawm ob qhov sib txawv ntawm cov hlau conductors. Qhov no yooj yim tab sis tseem ceeb mechanism ua rau lawv ubiquitous nyob rau hauv ntsuas kub nyob rau hauv kev lag luam xws li kev tsim, tsheb, thiab aerospace. Cov peev nyiaj thiab hwm cov thermocouples qhia cov ntsiab lus tseem ceeb no, tab sis cov ntaub ntawv, kev siv tes ua haujlwm, thiab kev tiv thaiv kev ua haujlwm tau ua rau lawv sib nrug heev.

Cov nyiaj siv nyiaj thermocouples feem ntau siv qis-qib hlau alloys rau cov neeg xyuas pib thiab nyias, tsis yog{1}} corrosion- tiv taus sheaths. Lawv ua tau raws li qhov xav tau ntawm kev ntsuas qhov kub thiab txias tab sis tsis muaj qhov ua tau ntev -tshwj xeeb tshaj yog nyob rau hauv ib puag ncig hnyav nrog kub kub, kev co, los yog tshuaj lom neeg. Hauv kev muaj tiag, cov qauv no feem ntau ua tsis tau lossis tsis muaj qhov tseeb hauv 6 mus rau 12 lub hlis ntawm kev siv tas li. Cov nqi hloov pauv ntxiv sai sai, tsis hais txog kev poob qis los ntawm kev ua tsis tiav tam sim ntawd. Ib qho kev tsim tawm ib zaug vim yog qhov tsis zoo ntawm cov nyiaj siv hluav taws xob thermocouple tuaj yeem tshaj qhov nyiaj tau los pib ntau zaus.

Premium thermocouples, los ntawm qhov sib piv, siv siab -cov khoom siv purity (xws li Inconel lossis Kanthal rau sheaths thiab calibrated conductor khub) thiab tau txais kev tswj xyuas zoo thaum tsim khoom. Cov khoom no txhim khu kev tiv thaiv corrosion, oxidation, thiab thermal shock, ncua kev pab cuam lub neej mus rau 3 mus rau 5 xyoo nyob rau hauv tib yam kev ua haujlwm. Lawv qhov tseeb drift tus nqi kuj tseem qis dua -feem ntau nyob rau hauv ± 0.5% ntawm qhov ntsuas ntau tshaj 5 xyoo, piv rau ± 2% lossis ntau dua rau lwm txoj kev siv nyiaj. Qhov tseeb ruaj khov zam cov khoom kim heev los ntawm qhov sib txawv ntawm qhov kub thiab txias, tus nqi zais feem ntau tsis pom zoo nrog cov kev xaiv nyiaj txiag.

Muab xam 5-xyoos lifecycle tus nqi qhia meej txog tus nqi. Piv txwv tias ib lub thermocouple pob nyiaj raug nqi $ 50, thaum tus nqi them tus nqi $ 150. Yog tias tus qauv peev nyiaj xav tau kev hloov pauv 4 zaug hauv 5 xyoos (nruab nrab 1.25- xyoo lifespan) thiab txhua qhov kev hloov pauv tau them $20 hauv cov nqi zog thiab cov nqi qis, tag nrho cov nuj nqis mus txog $50 ×4 + $20 ×{11}} $280. Tus qauv hwm, tsis tas yuav hloov pauv hauv 5 xyoos thiab kev saib xyuas tsawg, tag nrho tsuas yog $ 150. Ntxiv cov peev txheej poob los ntawm qhov tseeb qhov tsis raug- kwv yees ntawm ntau txhiab rau kev tsim khoom lag luam-thiab tus nqi sib txawv nthuav dav heev.

Thaum xaiv cov thermocouples, zam qhov ntxiab ntawm kev xaiv raws li tus nqi nce siab ib leeg. Txheeb xyuas qhov chaw ua haujlwm ua ntej: siab-kub, corrosive, lossis siab - vibration settings xav tau cov qauv hwm kom tsis txhob muaj kev ua tsis tiav. Rau cov ntawv thov tsawg dua, cov nyiaj siv hluav taws xob thermocouples tuaj yeem txaus, tab sis qhov tseem ceeb hauv kev hloov pauv thiab kev pheej hmoo poob qis. Raws li kev lag luam kev paub dhau los, txawm tias nyob rau hauv cov xwm txheej me me, cov thermocouples premium feem ntau tawg txawm tias tsis pub dhau 2 xyoo vim txo cov nqi kho thiab hloov cov nqi.

Qhov tseem ceeb ntawm kev noj qab haus huv yog tus nqi ntawm lub neej, tsis yog tus nqi pib, txiav txim siab tus nqi ntawm cov thermocouple. Cov qauv zoo tshaj plaws xa cov sijhawm ntev - kev ntseeg tau ntev, qhov tseeb ruaj khov, thiab qis dua tag nrho cov nuj nqis tshaj 5 xyoo, thaum cov kev xaiv peev nyiaj feem ntau ua rau cov nqi zais uas cuam tshuam kev txuag nyiaj. Cov ntawv thov kev lag luam sib txawv thiab kev ua haujlwm yuav tsum tau ua kom haum rau cov kev daws teeb meem thermocouple-los ntawm kev xaiv cov alloy mus rau cov qauv tsim. Kev cob qhia 选型 ua kom muaj kev ua tau zoo thiab tus nqi- ua haujlwm tau zoo, ua raws cov kev xaiv thermocouple nrog cov kev cai tshwj xeeb rau kev xa rov qab ntau tshaj ntawm kev nqis peev.