Dab tsi yog qhov ntsuas kub ntsuas ntawm hom R thermocouple?

Hom R thermocouple tuaj yeem ntsuas qhov kub ntawm -50 txog 1600 degrees Celsius, thiab nws tuaj yeem ua haujlwm ntawm qhov kub txog li 1300 degrees Celsius rau lub sijhawm ntev. Nws tuaj yeem khiav tsis tu ncua rau lub sijhawm ntev hauv ib puag ncig uas nruab nrab, oxidizing, thiab tsis muaj kuab paug. Qhov siab tshaj plaws luv luv-lub sijhawm ua haujlwm kub tuaj yeem ncav cuag 1600 ° C, uas yog qhov zoo rau kev siv ceev ceev - ntsuas kub los yog cua sov rau kev sim. Qhov no yog ib qho khoom muaj nqi hlau thermocouple, uas tseem hu ua "platinum-rhodium 13-platinum thermocouple." Qhov zoo electrode yog ua los ntawm platinum-rhodium alloy (RP) uas yog 13% rhodium thiab 87% platinum. Qhov tsis zoo electrode yog ua los ntawm cov ntshiab platinum (RN). Cov hlau txoj kab uas hla feem ntau yog 0.5 hli, tab sis nws yuav ntau npaum li 0.015 hli tawm. Nws yog nquag siv nyob rau hauv high-temperature industrial chaw, xws li saib xyuas qhov kub ntawm iav rauv, ceramic sintering, metallurgy, thiab hmoov metallurgy ua hauj lwm. Nws yog qhov tseeb heev thiab ruaj khov ntawm qhov kub thiab txias.




I. Qhov ntsuas kub ntsuas qhov tshwj xeeb kev faib tawm thiab siv cov xwm txheej



Lub peev xwm ntawm hom R thermocouples kom paub qhov kub thiab txias yuav tsum tau ua raws li qhov lawv tau siv tiag tiag:



Ntev -lub sijhawm ua haujlwm kub: ≤1300 degree



Hom R thermocouples tuaj yeem ua haujlwm rau lub sijhawm ntev hauv oxidizing lossis inert cua ntawm qhov kub thiab txias nrog cov thermoelectric me me drift thiab zoo ntev -lub sij hawm stability. Qee qhov chaw hais tias qhov kub siab tshaj plaws rau ntev - siv lub sijhawm huv huv tuaj yeem tshaj 1400 degree, tab sis nws tseem ceeb heev kom paub tseeb tias tsis muaj kuab paug.



Qhov kub siab tshaj plaws uas tuaj yeem ntsuas tau hauv lub sijhawm luv luv yog 1600 degree.



Yuav siv tau rau luv luv - kuaj lub sijhawm ntawm qhov kub thiab txias, xws li kev debugging txheej txheem, nrhiav teeb meem, lossis ua kev tshawb fawb hauv chav kuaj. Nws yog qhov zoo tshaj kom ua kom ntev li 30 feeb los yog tsawg dua kom cov thermocouple hlau nplej los ntawm kev ntxhib los yog cov neeg kho tshuab lub zog tsis muaj zog.



Tsawg- qhov kub thiab txias: Los ntawm -50 degree



Raws li txoj cai, nws tuaj yeem ntsuas qhov ntsuas kub qis dua, tab sis cov peev txheej thermoelectric hauv qhov no tsis muaj zog, uas ua rau nws tsis tshua muaj siab. Nws tsis yog feem ntau ua haujlwm rau kev ntsuas qhov ntsuas cryogenic. Feem ntau siv tau yog nyob rau hauv qhov chaw uas kub siab tshaj 0 ° C.



Kev txwv ntawm kev siv:



Tsis pub siv rau hauv qhov chaw qis qis, suav nrog cov H₂ lossis CO. Yog tias tsis yog, silicon yuav raug tshem tawm ntawm lub raj tiv thaiv thiab hloov mus ua Pt₅Si₂ eutectic. Qhov no yuav ua rau lub dipole hlau yaj nyob rau hauv lub grain ciam teb.



Nws yog qhov yooj yim heev rau kev kis kab mob, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias, thiab cov vapors hlau, plua plav, lossis cov pa taws tuaj yeem ua rau nws yooj yim. Rau kev sib cais, koj xav tau ib lub raj tiv thaiv ua los ntawm siab - zoo corundum los yog silicon nitride.







II. Cov txiaj ntsig rau kev ua haujlwm thiab kev ua haujlwm zoo



R-hom thermocouples muaj cov txiaj ntsig zoo hauv qab no tshaj lwm hom thermocouples:



Muaj tseeb thiab ruaj khov: Cov thermoelectric muaj peev xwm rov ua tau zoo, tsawg tsawg txhua xyoo drift, zoo rau ntsuas qhov ntsuas kub kom raug thiab hloov cov qauv.



Dav kub ntau: Nws tuaj yeem tswj qhov kub ntawm qhov nruab nrab mus rau qhov siab heev, ua rau nws muaj txiaj ntsig zoo hauv ntau qhov chaw lag luam.



Muaj zog tiv thaiv oxidation: Ua haujlwm zoo nyob rau hauv siab -kub oxidizing ib puag ncig thiab kav ntev.



Cov khoom ruaj khov physicochemical: Cov khoom tsis corrode lossis laus, yog li nws tuaj yeem siv tau ntev - xyuas.



Tab sis lawv kuj muaj qee qhov teeb meem loj:



Tsawg dua qhov ntsuas kub muaj peev xwm thiab qhov rhiab tsawg dua li K-hom thiab J- hom puag hlau thermocouples. Lawv xav tau cov cuab yeej tso saib uas muaj tseeb heev.



Tus nqi siab vim nws muaj ntau platinum thiab rhodium, uas yog cov hlau muaj txiaj ntsig. Qhov no txhais tau tias kev nqis peev loj loj.



Thaum kub siab, txhua yam muaj zog poob qis, uas ua rau lawv muaj peev xwm nkag mus. Cov kev hloov pauv lossis kev puas tsuaj yuav tsum tsim kom muaj lub hauv paus tsim nyog rau kev teeb tsa.







III. Qhov sib txawv ntawm cov qauv thoob ntiaj teb thiab lawv siv li cas tam sim no



R-hom thermocouples ua haujlwm zoo dua, txawm hais tias lawv tsis tau siv ntau hauv kev lag luam hauv kuv lub tebchaws. Cov laj thawj tseem ceeb yog:



Cov qauv txhawb S-hom thermocouples ntau dua: Lub Koom Haum International rau Standardization (ISO) thiab European Organization for Standardization (CEN) ob leeg qhia S-hom thermocouples. American Society for Testing and Materials (ASTM) feem ntau pom zoo R-hom thermocouples.



Tsawg dua kev tsim khoom hauv tsev: kuv lub teb chaws tau kav ntev S- hom kev lag luam, nrog R- hom feem ntau siv nrog cov khoom siv txawv teb chaws, ua rau tib neeg tsis tshua nyiam cov khoom lag luam ib txwm muaj.



Thaum nws los txog rau tus nqi -kev ua tau zoo, R- hom thermocouples ua haujlwm ib yam li S-hom thermocouples, tab sis lawv raug nqi ntau dua, uas ua rau lawv tsis tshua nyiam.



Hauv kev lag luam uas xav tau kev ntsuas qhov kub thiab txias heev, xws li aerospace, siab -kawg metallurgy, thiab kev tshawb fawb tshawb fawb, R- hom thermocouples tseem muaj txiaj ntsig zoo.