Dab tsi yog qhov ntsuas kub ntawm hom N thermocouple?

Hom N thermocouple tuaj yeem ntsuas qhov kub ntawm -270℃txog 1300℃. Nws tuaj yeem ua haujlwm ntawm qhov kub txog li 1200℃rau lub sijhawm ntev thiab mus txog 1300℃rau lub sijhawm luv. Qhov no yog ib qho ruaj khov thiab oxidation ntau tshaj -resistant puag hlau thermocouples ntawm lub khw tam sim no rau ntsuas kub hauv kev lag luam. Nws yog feem ntau siv nyob rau hauv high-kub oxidizing chaw xws li metallurgy, hwj chim, aerospace, thiab nuclear reactors.




I. Tso cai txhais ntawm qhov ntsuas qhov ntsuas kub thiab cov xwm txheej ntawm kev siv



Lub International Electrotechnical Commission (IEC) cov qauv thiab cov qauv hauv xeev Suav tau hais tias hom N thermocouple (nickel-chromium-silicon/nickel-silicon-}}}magnesium) tuaj yeem saib xyuas qhov kub ntawm -270 thiab 1300 degrees Celsius. Tab sis nyob rau hauv tiag tiag - engineering ntiaj teb no, koj yuav tsum qhia qhov txawv ntawm luv luv - lub sij hawm thiab mus sij hawm ntev siv:



Lub sijhawm ntev - lub sijhawm ua haujlwm tsis tu ncua yog 1200 degrees Celsius. Hom N thermocouple tuaj yeem ua haujlwm tsis tu ncua rau lub sijhawm ntev hauv cov huab cua oxidizing ntawm qhov kub thiab txias nrog me me thermoelectric peev xwm drift, qhia tias nws ruaj khov heev dhau sijhawm. Nws chav kawm kuv qhov tseeb yog ± 1.5 ° C lossis ± 0.25% t (t yog qhov ntsuas kub), uas yog qhov zoo rau cov ntawv thov kev lag luam uas xav tau kev tswj qhov kub thiab txias.



Luv -Lub sij hawm ntsuas kub ntawm huab cua: 1300℃Nws tuaj yeem tswj tau qhov kub siab ntawm 1300 ° C rau lub sijhawm luv luv (xws li thaum lub sijhawm sim ua cua sov lossis cov txheej txheem debugging), tab sis lub sij hawm yuav tsum tau khaws cia rau 30 feeb lossis tsawg dua kom tsis txhob muaj txoj hlua tiv thaiv tawg lossis cov hlau nplej txawm tias ntxhib heev.



Tsawg-kub applicability: tuaj yeem ntsuas mus rau -270 ° C Nws yuav tsum tsis txhob siv rau kev ntsuas qhov ntsuas kub tsis tshua muaj vim muaj qhov tsis sib xws loj nyob rau hauv thaj tsam ntawm -200 txog 400 degrees Celsius. Feem ntau siv tau yog nyob rau hauv qhov chaw uas kub tshaj 400 ° C.



Kev txwv ntawm kev siv:



Nws yog nruj me ntsis txwv tsis pub siv los txo lossis hloov cov huab cua (xws li cov H₂ lossis CO), vim tias qhov no yuav ua rau cov khoom siv hluav taws xob tsis zoo rau oxidize qhov nyiam, uas yuav ua rau cov thermoelectric tsis ruaj khov.



Tsis pom zoo siv rau hauv lub tshuab nqus tsev lossis tsis muaj zog oxidizing qhov xwm txheej, vim qhov no tuaj yeem yooj yim ua rau cov khoom siv thermocouple hlau volatilize, cuam tshuam rau nws lub neej ntev.



Tsis txhob kov sulfide, txhuas, zinc, lossis lwm yam pa taws tshwj tsis yog tias koj siv lub qhov dej zoo - kaw corundum tiv thaiv kom lawv nyob deb ntawm koj.







II. Cov txiaj ntsig ntawm cov khoom siv thiab kev ua haujlwm zoo



N-hom thermocouple yog tsim los ntawm ob lub npib tsib xee tshiab-raws li alloys:



Nickel-chromium-silicon alloy (Ni-Cr-Si) rau qhov zoo electrode (NP)



Tsis zoo electrode (NN): ib tug alloy ntawm nickel, silicon, thiab magnesium (Ni-Si-Mg)



Qee qhov txiaj ntsig tseem ceeb ntawm nws yog:



Muaj zog oxidation tsis kam: Ua haujlwm zoo hauv oxidizing cua hauv qab 1200 ° C, tiv taus luv luv - kab lattice xaj, thiab daws qhov teeb meem tsis ruaj khov ntawm K- hom thermocouples ntawm 300 thiab 500 ° C.



Zoo thermoelectric linearity: Cov kev sib raug zoo ntawm cov thermoelectric muaj peev xwm thiab qhov kub thiab txias yog zoo dua li ntawm K- hom nyob rau hauv thaj tsam ntawm 400-1300 ° C. Qhov no ua rau nws yooj yim dua rau kev ua thiab calibrate cov cim.



Kev tiv thaiv zoo rau cov hluav taws xob hluav taws xob: zoo rau qee qhov xwm txheej, xws li ntsuas qhov kub thiab txias hauv lub voj voog loj ntawm cov tshuab hluav taws xob nuclear.



Nws ua haujlwm zoo dua li Hom K tag nrho: nws ruaj khov dua nyob rau lub sijhawm thiab tuaj yeem ua haujlwm thermal cycling zoo dua, uas ua rau nws yog tus neeg sib tw zoo rau cov qauv txheej txheem hlau thermocouple.



Tab sis nws kuj muaj ob peb qhov tsis zoo: cov khoom siv nyuaj, uas ua rau kev ua haujlwm nyuaj; nws muaj qhov yuam kev loj dua nonlinear ntawm qhov kub thiab txias; thiab nws lub peev xwm thermoelectric tsawg dua li Hom E, yog li koj xav tau cov cuab yeej siv tau zoo heev los siv nws.







III. Cov Kev Siv Feem Ntau thiab Cov Lus Qhia rau Kev Xaiv N- hom thermocouples feem ntau yog siv nyob rau hauv cov nram qab no siab - kub industrial sectors:



Kev Lag Luam Metallurgical: Khaws qhov muag ntawm qhov kub thiab txias ntawm cov converters, blast furnaces, thiab cua sov rauv



Fais fab Systems: Khaws cov roj turbine thiab boiler combustion zones ntawm qhov kub thiab txias



Aerospace: Kev ntsuas cov cav ntawm qhov kub thiab txias ntawm cov rooj zaum



Kev Lag Luam Nuclear: Khaws qhov muag ntawm qhov kub thiab txias ntawm lub tshuab reactor txias



Thaum xaiv ib lub thermocouple, nco ntsoov cov khoom no:



Corundum tubes (Al₂O₃) los yog ob npaug - txheej ceramic raj yog cov ntaub ntawv zoo tshaj plaws rau cov raj tiv thaiv vim lawv tuaj yeem tiv taus qhov kub thiab txias.



Hlau txoj kab uas hla: Feem ntau qhov ntau thiab tsawg siv hauv kev lag luam yog Φ0.5mm txog Φ1.0mm. Cov xov hlau nyias nyias teb sai dua tab sis tsis kav ntev li ntev.



Txoj kev ntawm kev teeb tsa: Qhov tob ntawm qhov ntxig yuav tsum yog tsawg kawg 10 npaug ntawm txoj kab uas hla ntawm lub raj tiv thaiv kom paub tseeb tias nws nyob hauv kev sib cuag nrog qhov nruab nrab.



Calibration tsis tu ncua: Txhawm rau kom paub tseeb tias qhov ntsuas tau raug, koj yuav tsum ntsuas txhua rau lub hlis.