Yuav ua li cas xaiv cov thermocouples ntawm cov qauv sib txawv

Thermocouples feem ntau yog siv los ntsuas qhov ntsuas kub hauv qhov ntsuas kub. Lawv ncaj qha ntsuas qhov ntsuas kub thiab hloov cov teeb liab kub mus rau hauv lub ntsuas hluav taws xob hluav taws xob hluav taws xob hluav taws xob, uas yog tom qab ntawd hloov mus rau hauv qhov ntsuas kub ntawm qhov nruab nrab ntsuas los ntawm cov hluav taws xob nto (secondary deg).
Cov tsos ntawm ntau yam thermocouples feem ntau sib txawv vim qhov xav tau, tab sis lawv cov qauv tsim feem ntau yog tib yam. Lawv feem ntau yog tsim los ntawm cov khoom tseem ceeb xws li thermal electrodes, rwb thaiv tsev lub tes tsho tu tub, thiab hlws ris thawv, thiab feem ntau yog siv los ua ke nrog kev nthuav qhia cov tsos, sau cov tsos, thiab hluav taws xob regulators.
1. Platinum Platinum Rhodium Thermocouple (S-type) Kawm Tiav Tus lej LB-3 Muaj Thermocouple Hlau: Φ 0.5mm, kev siv hauv chav kuaj yuav zoo dua. Cov electrode zoo: Platinum rhodium alloy hlau, tempered nrog 90% platinum thiab 10% rhodium (hauv kev faib ua feem). Tsis zoo electrode: Platinum hlau. Kev ntsuas kub: Lub sijhawm ntev: 1300 degree, lub sijhawm luv: 1600 degree.
Nta:
(1) Cov khoom siv ruaj khov ua haujlwm thiab ntsuas qhov tseeb; Yuav ua tau rau hauv tus qauv thermocouples los yog siv cov thermocouples. Kev Siv: Chav kuaj lossis ntsuas ntawm lwm cov thermocouples.
(2) Qhov ntsuas kub yog qhov siab, feem ntau yog siv los ntsuas qhov kub siab tshaj 1000 degree.
(3) Nyob rau hauv high-temperature restorative gases (xws li gases uas muaj Co, H2, thiab lwm yam), lawv yog nquag yaig thiab yuav tsum tau siv lub tes tsho tu.
(4) Cov khoom siv yog cov hlau muaj txiaj ntsig thiab muaj tus nqi siab. (5) Tsis muaj zog thermoelectric peev xwm.
2. Platinum rhodium 30-Platinum rhodium thermocouple (Hom B) nrog tus lej faib ntawm LL-2. Cov electrode zoo: Platinum rhodium alloy (ua los ntawm tempering nrog 70% platinum thiab 30% rhodium). Tsis zoo electrode: Platinum rhodium alloy (ua los ntawm tempering nrog 94% platinum thiab 6% rhodium). Kev ntsuas kub: Nws tuaj yeem ncav cuag 1600 degree rau lub sijhawm ntev thiab 1800 degree rau lub sijhawm luv luv.
Dab tsi yog qhov kev xaiv sib txawv rau ntau hom thermocouples?
Nta:
(1) Cov khoom siv ruaj khov ua haujlwm thiab ntsuas qhov tseeb.
(2) Ib qho yooj yim rau corrode hauv cov pa roj rov qab.
(3) Qhov ntsuas kub tsis tshua muaj hluav taws xob muaj peev xwm me me, thiab qhov txias kawg kub tuaj yeem qis dua 50 degree yam tsis tau them nyiaj.
(4) Tus nqi siab.
3. Ob peb Thermocouples nrog rau kev siv tshwj xeeb
(1) Iridium thiab iridium alloy thermocouples xws li iridium 50 rhodium iridium 10 ruthenium thermocouples tuaj yeem ntsuas kub txog 2100 degree hauv qhov chaw oxidizing.
(2) Tungsten rhenium thermocouples tau tsim nyob rau xyoo 1960 thiab tam sim no yog hom zoo dua ntawm cov thermocouple kub. Lawv tuaj yeem siv rau hauv lub tshuab nqus tsev vacuum inert gas lossis hydrogen media, tab sis lawv qhov kub thiab txias tsis kam rau oxygen tsis zoo. Lub teb chaws tsim tungsten rhenium tungsten rhenium 20 thermocouple muaj qhov kub thiab txias ntawm 300-2000 degree thiab kev faib qhov tseeb ntawm 1%.
(3) Kub hlau npib tsib xee chromium thermocouples feem ntau yog siv rau qhov ntsuas kub qis thiab tuaj yeem siv nyob rau hauv thaj tsam ntawm 2-273K, nrog rau qhov rhiab heev ntawm kwv yees li 10 μ V / degree.
(4) Lub palladium platinum iridium 15 thermocouple yog qhov tso zis siab thermocouple nrog lub peev xwm thermoelectric ntawm 47.255mV ntawm 1398 degree, uas yog peb zaug siab dua li lub peev xwm ntawm lub platinum platinum rhodium 10 thermocouple ntawm tib qhov kub. Yog li ntawd, nws tuaj yeem siv nrog qhov ntsuas qhov taw qhia tsawg dua thiab feem ntau siv hauv kev lag luam aviation.

(5) Iron constantan thermocouple, nrog lub siab rhiab heev ntawm kev faib tus lej TK, txog 53 μ V / degree, zoo linearity, tus nqi pheej yig, tuaj yeem siv hauv xov xwm rov qab hauv qab 800 degree. Thawj qhov tsis zoo yog tias hlau yog qhov yooj yim rau oxidation, thiab kev siv blueing kev kho mob tuaj yeem txhim kho nws cov xeb tiv thaiv.
(6) Lub peev xwm thermoelectric ntawm cov tooj liab tsis tu ncua thermocouple, nrog tus lej faib MK thermocouple, yog me ntsis siab dua li cov nickel chromium nickel silicon thermocouple, txog 43 μ V / degree. Zoo reproducibility, stability, siab raug, thiab tus nqi pheej yig. Qhov tsis zoo yog tias tooj liab yog qhov ua rau oxidation thiab dav siv hauv qhov ntsuas kub qis ntawm 20K thiab 473K.
4. Lub zirconium diboride composite ceramic thermocouple muaj qhov ntsuas qhov tseeb ntawm ± 2 degree ntawm 200-1900 degree, thiab tuaj yeem siv rau hauv lub tshuab nqus tsev lossis oxidation ib puag ncig ntawm 1900-2200 degree nrog qhov yuam kev ntawm ± 10 degree. Tab sis nws tseem tsis tau txais kev lees paub dav dav los ntawm cov khw muag khoom.