Dab tsi yog lifespan ntawm Hom B thiab Hom T thermocouples

Lub neej ntev ntawm hom B thiab Hom T thermocouples sib txawv heev, feem ntau cuam tshuam los ntawm cov khoom siv, kev ua haujlwm kub, ib puag ncig huab cua, thiab kev tiv thaiv kev ua haujlwm. Feem ntau, Hom B thermocouples kav ntev dua ntawm qhov kub thiab txias, thaum Hom T thermocouples ruaj khov heev ntawm qhov kub thiab txias.




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 qhov xwm txheej zoo tshaj plaws, lawv yuav kav ntev dua 2000 teev.



Ntev -lub sij hawm kub rau kev ua haujlwm: 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℃)



Cov kev txwv: nws yooj yim rau kev sib kis, kim, thiab tsis yog qhov tseeb ntawm qhov kub qis (<600°C)







II. Hom T thermocouples: Muaj tseeb heev ntawm qhov kub thiab txias, txawm hais tias lawv oxidize tau yooj yim ntawm qhov nruab nrab thiab kub.



Hom T thermocouples, uas yog ua los ntawm tooj liab thiab constantan, yog lub hauv paus hlau thermocouples uas pheej yig, ua haujlwm zoo nyob rau hauv qis - qhov kub thiab txias kev lag luam, thiab muaj peev xwm theoretically khiav rau 10,000 teev ncaj.



Standard ua hauj lwm kub: -200 rau 350 degrees Celsius



Kub tiv taus ib lub sij hawm luv luv: 400 degree



Kev ua neej nyob tiag tiag: Hauv cov tshuab ua haujlwm ntawm qhov kub qis, zoo li lub tub yees thiab cua txias, lub neej feem ntau yog 3 txog 5 xyoos. Tshaj 350 degree, tooj liab zoo electrode zoo li yuav oxidize, uas tuaj yeem ua rau thermoelectric muaj peev xwm drift lossis hlau tawg. Nyob rau hauv cov av noo los yog leej faj-muaj ib puag ncig, qhov tsis zoo electrode tsis tu ncua yog yooj yim rau corrode, uas tuaj yeem cuam tshuam rau lub sijhawm ntev -.



Pros: Nws yog pheej yig, muaj tseeb heev, thiab muaj linearity zoo. Nws yog tshwj xeeb tshaj yog zoo rau ntsuas kub ntawm -200 thiab 0 degree.



Cov kev txwv: Nws tsis ua haujlwm zoo hauv oxidizing ib puag ncig ntawm qhov kub thiab txias, yog li nws tsis zoo rau kev nyeem ntawv siab -.







III. Kev sib piv ntawm cov ntsiab lus tseem ceeb uas cuam tshuam rau lub neej



Cov lus: Hom B Thermocouple thiab Hom T Thermocouple



Kev khiav hauj lwm kub: Qhov siab tshaj plaws txwv yog ntau dua li hom T, txawm li cas los xij lub neej nyob qis dua ntawm qhov kub siab dua. Tshaj 350 degree, txhua yam pib tawg sai dua, yog li lawv tsis zoo rau kev siv sijhawm ntev -.



Atmosphere: Tsuas yog ua haujlwm nyob rau hauv cov xwm txheej uas oxidizing, inert, los yog lub tshuab nqus tsev. Nws tuaj yeem siv rau hauv qhov chaw uas muaj cov pa oxygen tsawg, tab sis tsis yog nrog sulfides lossis hnyav av noo.



Kev Tiv Thaiv Kev Ntsuas: Nws yog qhov zoo tshaj plaws los siv 99% corundum tiv thaiv tubing kom cov khoom siv ntev dua. Txhawm rau tiv thaiv oxidation, nws yog qhov zoo tshaj rau muab cov hlau los yog ceramic sheaths.



Calibration Cov Lus Qhia: Calibrate txhua 12 txog 18 lub hlis, thiab yog tias qhov yuam kev mus dhau qhov kev txwv, hloov nws. Hloov txhua peb mus rau tsib xyoos, lossis calibrate ntau zaus kom paub tseeb tias qhov tseeb.







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: Nws yog qhov zoo tshaj plaws los siv tubing ua los ntawm siab -purity alumina (corundum).



Hom T: Koj tuaj yeem xaiv ntawm cov hlau tsis muaj hlau lossis cov hlua khi.



Tshawb xyuas seb qhov ntsuas kub puas muaj peev xwm degradation ntau dua li qhov kev ua yuam kev (piv txwv li, ± 3 degree) thaum lub sijhawm ua haujlwm tsis tu ncua thiab kho.



Txhawm rau txo cov neeg kho tshuab kev co thiab thermal shock, ceev faj thaum txhim kho thiab tsis txhob cia nws mus dhau qhov kub thiab txias ntau dhau.