Thermocouple Aging Mechanism thiab Kev Pabcuam Lub Neej Extension Methods
Thermocouple kev ua tau zoo attenuation yog ib qho kev laus zuj zus thiab hloov tsis tau rov qab uas txhua qhov kev lag luam cua sov yuav ntsib tom qab ua haujlwm ntev -. Ntau pawg tsim khoom tsuas yog hloov cov thermocouples tom qab ua tiav tsis ua tiav thiab tsis quav ntsej qhov kev hloov pauv hloov pauv hauv cov txheej txheem kev laus, ua rau lub sijhawm ntev - cov khoom tsis ruaj khov thiab cov khoom lag luam hloov pauv. Hauv - kev nkag siab tob txog cov cai tswj kev laus ntawm cov thermocouple thiab cov hom phiaj kev saib xyuas kom ncua kev laus sai thiab tswj xyuas kom ntev li - lub sij hawm nrhiav kom raug.
High -kub oxidation yog qhov tseem ceeb ntawm kev laus ntawm thermocouple alloy hlau. Ntev- lub sijhawm ua haujlwm nyob rau hauv siab - qhov kub thiab txias ib puag ncig ua rau qeeb oxidation cov tshuaj tiv thaiv nyob rau saum npoo ntawm sab hauv thermoelectric alloy xov hlau. Oxide khaubncaws sab nraud povtseg nrog inconsistent thickness yog tsim nyob rau hauv cov hlau nto, hloov thawj cov yam ntxwv ntawm cov hlau thermoelectric yam ntxwv. Hauv zos oxidation ua rau tsis muaj peev xwm sib txawv ntawm cov zis, tsim kom pom qhov yuam kev. Qhov siab dua qhov ua haujlwm kub, qhov ceev ntawm oxidation ceev thiab qhov pom tseeb ntawm kev ua haujlwm attenuation. Nquag kub nce thiab lub caij nplooj zeeg mus ntxiv ua rau cov thermal qaug zog thiab ua kom cov txheej txheem laus.
Environmental contamination thiab tshuaj corrosion aggravate thermocouple tsis ua hauj lwm. Cov chaw ua haujlwm muaj cov roj fume, acidic thiab alkaline vapor, hlau plua plav thiab lwm yam pa phem. Cov tshuaj no ua raws li cov thermocouple sojntsuam qhov chaw thiab nkag mus rau hauv cov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob. Nickel-chromium alloy thermocouples yog cov rhiab heev rau sulfur thiab carbon kuab paug, uas yooj yim ua rau thermoelectric kev sib txawv thiab xaim brittleness. Cov hlau zoo nkauj thermocouples raug kev txom nyem los ntawm cov qauv siv lead ua hloov tom qab ntev - lub sij hawm adsorption ntawm industrial impurities, uas ua rau txo stability.
Cov neeg kho tshuab qaug zog thiab kev puas tsuaj ntawm cov txheej txheem ua kom muaj kev ua haujlwm tsis zoo. Cov cuab yeej ua haujlwm kev vibration, kev saib xyuas cov cuab yeej nquag thiab rov ua dua tshiab ua rau cov txheej txheem me me puas rau cov thermocouple hauv cov xov hlau thiab cov ntsiab lus vuam. Ntev-lub sij hawm micro- kev co ua rau hlau qaug zog, xaim xaim thiab vuam taw tes virtual kev sib txuas, ua rau muaj teeb meem tsis sib xws. Kev khoov ntau dhau thiab ncab thaum lub sijhawm teeb tsa kuj tseem ua rau muaj kev puas tsuaj rau cov qauv, maj mam txhim kho mus rau qhov teeb meem cuam tshuam thiab ua tsis tiav.
Kev saib xyuas thiab kev tiv thaiv kev tshawb fawb tau zoo txuas ntxiv rau kev pab cuam lub neej ntawm thermocouple. Sib piv siab -kub corrosion- tiv thaiv lub tes tsho tiv thaiv kev ua qias tuaj sab nraud thiab oxidation yaig, zoo heev txo kev laus ceev. Kev tu lub ntsej muag tsis tu ncua tshem tawm cov plua plav thiab cov roj paug ntawm qhov chaw sojntsuam kom rov ua kom lub thermal induction rhiab heev. Periodic professional calibration kho cov teeb meem uas tshwm sim los ntawm kev laus me ntsis thiab ua kom paub tseeb qhov tseeb. Kev zam dhau - kub tshaj qhov ua haujlwm tiv thaiv kev puas tsuaj ntawm cov khoom siv hlau tsis zoo.
Standardized siv tus cwj pwm ncua sij hawm thermocouple thermal qaug zog. Txo qhov kub thiab txias sai sai thiab poob qis, tswj xyuas qhov kub thiab txias ua haujlwm ntau yam thiab zam kom tsis txhob ntev -lub sijhawm ua haujlwm kub siab tshaj plaws tiv thaiv kev ua haujlwm zoo ntawm alloy hlau. Tsim nyog kho thiab xaim txo kev co kev sib txhuam thiab kev ua haujlwm qaug zog. Kev hloov pauv raws sij hawm ntawm kev laus cov khoom siv tshem tawm cov teeb liab zais kev phom sij ua ntej tsis ua haujlwm.
Thermocouple kev laus yog qhov tsis tuaj yeem zam tau hauv kev ua haujlwm ntev - lub sijhawm ua haujlwm, tab sis kev laus nrawm thiab kev ua yuam kev tuaj yeem tswj tau zoo los ntawm kev tiv thaiv kev tshaj lij thiab kev saib xyuas tus qauv. Customized txij nkawm thiab hloov lub voj voog cov phiaj xwm tsim raws li cov khoom siv ua haujlwm siv zog thiab cov yam ntxwv ua haujlwm kom paub meej ntev -lub sij hawm ruaj khov thiab raug ntsuas kub rau cov tshuab cua sov.
