Dab tsi yog lifespan ntawm Hom B thiab Hom J thermocouples

Hom B thiab Hom J thermocouples muaj lub neej sib txawv heev. Lub hauv paus tseem ceeb uas txiav txim siab qhov no yog cov khoom siv, qhov kub thiab txias uas lawv siv, qhov chaw nyob ib puag ncig lawv, thiab kev ntsuas kev nyab xeeb siv. Hom B thermocouples feem ntau kav ntev dua ntawm qhov kub thiab txias, thaum Hom J thermocouples kav ntev dua nyob rau hauv nruab nrab thiab qis kub thiab hauv huab cua tsawg.




I. Hom B Thermocouples: Ntev Lifespan nrog Precious Hlau, Zoo rau kub heev



Hom B thermocouples (platinum-}rhodium 30-platinum-rhodium 6) yog ua los ntawm cov hlau zoo nkauj thiab ruaj khov ntawm qhov kub thiab txias thiab tiv taus oxidation. Hauv cov xwm txheej zoo tshaj plaws, lawv tuaj yeem kav ntev dua 2000 teev.



Ntev -lub sij hawm kub rau kev siv: 1600 degree



Kev kub siab rau lub sijhawm luv luv: 1800 degree



Kev ua haujlwm tiag tiag: Kev ua haujlwm ruaj khov rau 3-5 xyoos hauv oxidizing lossis inert cua tshaj 1300 degree; Yog tias koj khiav nws tag nrho ntawm 1600℃rau lub sijhawm ntev, lub neej yuav raug txiav luv luv rau 3-6 lub hlis. Nws kuj tawg yooj yim hauv sulfur-, carbon-, lossis txo cov cua, yog li nws tsis qhia rau kev siv.



Cov txiaj ntsig: Me me drift ntawm qhov kub thiab txias, muaj zog ruaj khov, thiab tsis tas yuav tsum tau kho qhov txias txias (qhov muaj peev xwm thermal<3μV at 0~50℃)



Kev txwv: Lawv nkag siab rau kev sib kis, raug nqi ntau, thiab tsis ntsuas qhov ntsuas kub tsawg (<600°C).







II. Hom J thermocouple: Ib qho kev xaiv zoo rau nruab nrab thiab qis kub vim nws pheej yig, tab sis nws tuaj yeem oxidize ntawm qhov kub thiab txias.



Hom J thermocouples (hlau-constantan) yog lub hauv paus hlau thermocouples uas pheej yig, ua haujlwm zoo hauv nruab nrab thiab qis- qhov kub thiab txias kev lag luam, thiab tau hais tias yuav kav ntev li 10,000 teev ntawm kev siv tas mus li.



Qhov kub ua haujlwm li qub yog 0 txog 750 degrees Celsius.



Kub rau luv- siv sijhawm: 950 degree



Kev ua haujlwm tiag tiag: Hauv oxidizing lossis txo cov cua ntawm 0 ~ 500 degree, lub neej ntev tuaj yeem ncav cuag 2-3 xyoos; Tshaj 500 degree, cov hlau zoo electrode oxidizes sai, thiab lub neej poob qis; Nws yuav corrode sai heev nyob rau hauv ib puag ncig uas muaj leej faj thiab siv tsis tau rau ncua sij hawm.



Pros: pheej yig, rhiab heev (nyob ib ncig ntawm 50μV / degree), thiab tuaj yeem siv los txo qis cua



Kev txwv: Tsis zoo siab -kub oxidation tsis kam, hlau yooj yim rau xeb, yuav tsum muaj lub raj tiv thaiv kom ntev lub neej







III. Saib ntawm tej yam tseem ceeb uas cuam tshuam rau lub neej



Cov lus: Hom B Thermocouple thiab Hom J Thermocouple



Kev khiav hauj lwm kub: qhov kub siab dua, lub neej luv dua. Txawm li cas los xij, qhov kev txwv siab tshaj plaws yog ntau dua li Hom J. Deterioration nrawm dua 500 degree; ntev -lub sij hawm siab- kub tsis pom zoo siv.



Atmosphere: Tsuas yog ua haujlwm nyob rau hauv cov xwm txheej uas oxidizing, inert, los yog lub tshuab nqus tsev. Yuav siv tau nyob rau hauv ob qho tib si oxidizing thiab txo qhov chaw, tab sis tsis nrog sulfides.



Kev Tiv Thaiv Kev Ntsuas: Feem ntau, lawv tuaj nrog lub raj tiv thaiv ua los ntawm corundum lossis siab -purity alumina, uas ua rau lawv lub neej ntev heev. Nws raug nquahu kom siv cov hlau los yog ceramic sheath los tiv thaiv oxidation thiab mechanical puas.



Calibration Cov Lus Qhia: Calibrate txhua 12-18 lub hlis; hloov yog yuam kev tshaj 10%. Tshawb xyuas txhua rau rau mus rau kaum ob lub hlis thiab kho cov oxidation lossis teeb liab tam sim ntawd.







IV. Yuav Ua Li Cas Thermocouples Ntev Ntev



Tsis txhob cia cov khoom kub dhau: Tsuas yog siv lawv nyob rau hauv qhov ntsuas kub uas lawv tau ntsuas rau.



Xaiv txoj cai tiv thaiv tubing:



Hom B: 99% corundum tubing pom zoo (piv txwv li, WRR-130 qauv)



Hom J: Koj tuaj yeem siv stainless hlau lossis silicon carbide tubing.



Tsis tu ncua calibration thiab txij nkawm: Xyuas seb lub thermoelectric tej zaum yuav lwj ntau tshaj qhov tso cai yuam kev (piv txwv li, ± 3℃).



Txo cov neeg kho tshuab kev co: zam kev sib tsoo thaum lub sijhawm teeb tsa; ua haujlwm ntawm lub qhov cub kom maj mam.