Dab tsi yog qhov txawv ntawm hom N thiab hom J thermocouples

Qhov sib txawv tseem ceeb ntawm hom N thiab hom J thermocouples nyob rau hauv lawv cov khoom muaj pes tsawg leeg, ntsuas qhov kub thiab txias, cov yam ntxwv ruaj khov, kev hloov pauv ib puag ncig, thiab cov xwm txheej siv tau. Lawv sawv cev rau ob txoj hauv kev hauv kev ntsuas kub tam sim no: "siab-kev ruaj ntseg, nruab nrab- kub hom" thiab "kev lag luam, nruab nrab- kub tsis tshua muaj dav- hom phiaj," feem. Hom N thermocouples ho txhim kho siab -kub oxidation kuj thiab ntev - lub sij hawm stability los ntawm optimized alloy muaj pes tsawg leeg, ua rau lawv haum rau tas mus li siab - ntsuas kub ntawm 400 mus rau 1300℃. Hom J thermocouples, ntawm qhov tod tes, paub txog lawv cov nqi qis, cov teeb liab tawm loj, thiab tsis kam txo cov cua sov, thiab tau siv dav hauv kev lag luam tswj hauv 0-750℃ntau yam, xws li hauv kev lag luam tshuaj thiab zaub mov.

 

I. Cov khoom xyaw: Nickel-Chromium-Silicon/Nickel-Silicon-Magnesium vs. Iron-Constantan

N-Type Thermocouple (Nickel-Chromium-Silicon/Nickel-Silicon-}Magnesium): Cov electrode zoo (NP) yog npib tsib xee-chromium-silicon alloy (Ni:Cr:Si: Electrode 1.4{2}) nickel-silicon-magnesium alloy (Ni:Si:Mg=95.5:4.4:0.1).

Nws belongs rau lub hauv paus hlau thermocouple qeb. Los ntawm kev nce cov ntsiab lus Cr thiab Si thiab tshem tawm cov ntsiab lus oxidized yooj yim xws li Mn thiab Co, nws ua tau zoo kov yeej cov teeb meem luv luv ntawm K- hom thermocouples hauv 300 ~ 500℃ntau yam.

J-Hom Thermocouple (Hlau-Constantan): Qhov zoo electrode yog hlau ntshiab (JP), thiab cov electrode tsis zoo yog tooj liab-nickel alloy (JN, tseem hu ua constantan). Cov nominal muaj pes tsawg leeg yog 55% tooj liab, 45% npib tsib xee, thiab cov kab ntawm manganese, cobalt, thiab lwm yam.

Kuj tseem muaj nyob rau hauv pawg hlau thermocouple, tab sis vim qhov yooj yim oxidation ntawm cov hlau electrode, qhov ntev -lub sij hawm ua hauj lwm kub yog txwv.

Cov ntsiab lus: Hom N cov ntaub ntawv ruaj khov dua thiab haum rau ntev - lub sij hawm siab - kub ua haujlwm; Hom J cov ntaub ntawv raug nqi qis dua thiab tus nqi ntau dua - siv tau, haum rau nruab nrab - thiab qis - cov ntawv thov kub batch.

 

II. Kev sib piv ntawm qhov kub thiab txias: Hom N npog qhov dav dav dua - qhov kub thiab txias, thaum Hom J tsom rau qhov ua tau zoo nruab nrab - thiab qis - cov ntawv siv kub.

Rooj: Hom	Ntev -Lub sijhawm ua haujlwm kub	Luv -Lub sij hawm tiv taus kub	Kev ntsuas qhov ua tau zoo
Hom N	1200 degree	1300 degree	-200 ~ 1300 degree
Hom J	500 ~ 750 degree	750 degree	-210 ~ 1200℃(Feem ntau siv 0 ~ 750 degree)

Hom N thermocouples tuaj yeem ua haujlwm ruaj khov rau lub sijhawm txuas ntxiv hauv qab 1200 degree. Nyob rau hauv 400 ~ 1300℃ntau yam, lawv cov yam ntxwv thermoelectric yog linearly superior rau hom K, ua rau lawv yog ib qho kev xaiv zoo tshaj plaws rau high - kub kub industrial furnaces.

Txawm hais tias Hom J muaj qhov ntsuas qhov ntsuas qhov ntsuas dav dav, nws cov ntawv thov siv tau feem ntau txwv rau qis dua 750℃vim tias cov hlau cathode oxidizes sai heev ntawm qhov kub thiab txias thiab ua rau tawg.

Faj seeb: Hom J thermocouples yuav tsum tau haum nrog lub tsho tiv thaiv (xws li 304/316 stainless hlau) siab tshaj 500℃kom ntev lawv lub neej; Hom N thermocouples tsis pom zoo siv rau hauv qhov tsis muaj zog oxidizing lossis txo cov cua.

 

III. rhiab heev thiab teeb liab tso zis yam ntxwv

Hom N Thermocouple: Thermoelectric muaj peev xwm yog kwv yees li 39μV / degree, nrog rau nruab nrab rhiab heev, qis dua Hom E thiab Hom J, tab sis siab dua Hom S.

Qhov zoo muaj xws li me me thermoelectric muaj peev xwm drift thiab zoo rov ua dua ntawm qhov kub thiab txias, ua rau nws haum rau ntev - cov ntaub ntawv tau txais thiab kev soj ntsuam xyuas.

Hom J Thermocouple: Thermoelectric muaj peev xwm siab npaum li kwv yees li 50 ~ 51μV / degree, nrog kev nkag siab ntau dua li Hom K, thiab cov teeb liab yooj yim kom tau txais thiab txheej txheem.

Linearity ua tau zoo nyob rau hauv 0 ~ 750℃ntau yam nrog me me yuam kev, ua rau nws haum rau industrial kub tswj systems.

Piv txwv piv txwv: Ntawm 600 degree, Hom J outputs kwv yees li 30 ~ 33mV, thaum Hom N tso tawm kwv yees li 23 ~ 25mV. Hom J muaj lub teeb liab muaj zog dua thiab haum rau kev nyeem ncaj qha los ntawm cov twj paj nruag zoo tib yam.

 

IV. Environmental Adaptability thiab kev txwv kev siv

Rooj Environmental Type	N-type Performance	J-type Performance
Oxidizing Atmosphere	Zoo heev, muaj zog oxidation tsis kam qis dua 1200 degree	Hlau cathode yog yooj yim oxidized saum 500 degree, tiv thaiv tubing yuav tsum tau
Txo Huab Cua	Tsis siv tau	Siv tau, tiv taus H₂ thiab CO gas corrosion
Inert/Vacuum Ib puag ncig	Tsis pom zoo	Siv tau, haum rau ntau yam kev ua haujlwm
Sulfur{0}}Nrog ib puag ncig	Txwv tsis pub	Txwv tsis pub, yooj yim corroded los ntawm hlau thiab constantan
Ntev - Lub Sij Hawm Stability	Zoo heev, muaj zog tiv thaiv hluav taws xob neutron	Qhov nruab nrab, yooj yim deteriorates ntawm qhov kub thiab txias

Kev pom zoo: N- hom yog siv nyob rau hauv siab - qhov cub kub, cov khoom siv hluav taws xob nuclear, thiab lwm yam xwm txheej uas yuav tsum tau ua kom ntev - lub sij hawm ruaj khov; J- hom yog haum rau cov chaw lag luam uas txo cov pa roj, xws li roj refining, tshuaj, thiab ua zaub mov.

 

V. Kev sib piv ntawm Daim Ntawv Thov Kev Sib Tham

N-hom thermocouples: Dav siv nyob rau hauv siab- qhov kub thiab txias muaj qhov cub, cov khoom siv kho cua sov, kev saib xyuas lub tshuab aerospace, kev ntsuas kub ntawm lub tshuab hluav taws xob nuclear, thiab lwm yam kev siv uas yuav tsum tau muaj kev ruaj ntseg ntev -.

Vim lawv qhov kev ua tau zoo tshaj plaws piv rau hom K, lawv tau maj mam hloov hom K raws li cov tiam tshiab ntawm nruab nrab - thiab siab - ntsuas qhov ntsuas kub.

J-hom thermocouples: Feem ntau siv rau hauv cov yas txhaj tshuaj molding tshuab, cov kab ziab zaub mov, boilers me me, chav kuaj lub tshuab nqus tsev vacuum, thiab lwm qhov chaw uas yuav tsum tau muaj kev tiv thaiv kom tsis txhob muaj huab cua los yog tsawg- ntsuas kub ntsuas.

Vim lawv cov nqi qis thiab cov teeb liab siab, lawv kuj tau siv los hloov ib ntus rau hom K thermocouples thaum lub sij hawm kho khoom siv.