Cov ntaub ntawv xav tau thiab cov kev sib tw ua ib txwm siv rau cov thermoounles hauv cov hluav taws xob hluav taws xob hauv hluav taws xob

Thermocouple yog ib tug dav siv ntsuas ntsuas uas muaj qhov cuam tshuam tseem ceeb hauv ntau yam kev lag luam. Kev siv thermocoples nyob rau hauv cov hluav taws xob hluav taws xob kuj tseem ceeb heev, ua si ib qho tseem ceeb. Daim ntawv thov ntawm thermocows nyob rau hauv cov hluav taws xob hluav taws kuj muaj qee qhov kev xav tau rau lawv cov ntaub ntawv.

 

Cov ntaub ntawv thov rau cov thermoounles hauv cov hluav taws xob hluav taws xob:

 

1. Tsawg kub tsis kam - ntsuas qhov ntsuas kub ntawm cov thermocouple nyob ntawm qhov tsawg-kub muaj nuj nqi ntawm cov thermoelectric electrode. Hauv lwm lo lus, qhov ntau ruaj khov lub cev thiab tshuaj lom neeg ntawm lub thermoelectric electrode hauv qhov ntsuas kub qis, ntsuas qhov ntsuas kub ntawm cov thermocrouple muaj ntau ntawm nws.

 

2. Ntau Tshaj Plaws - Siv ThermoSples nrog cov ntaub ntawv thermoelectric electrode, thov kom lawv cov hluav taws xob cua sov tuaj yeem tsim hauv cov pob thiab muaj cov khoom siv hluav taws xob zoo;

 

3. Kev siab zoo thiab zoo linearity - qhov kub qhov sib txawv thiab qhov kub qhov sib txawv uas yuav tsum tau txaus thiab linearly correlated nrog kub;

 

4. Ntxiv rau kom tau raws li cov cai saum toj no, peb kuj vam tias cov khoom siv tsis kam ua tau, thiab nws tus nqi pheej yig thiab cov khoom noj yog qhov txaus.

 

Thermocouples siv rau hauv cov hluav taws xob ua hluav taws xob yuav tsum tau raug xaiv raws li kev thov thaum thov. Muaj pes tsawg hom ntawm thermocouples yog feem ntau siv tam sim no

 

[1) Platinum Rhodium / Platinum Thermocouple - nws txoj kev kawm tiav yog ib qho zoo ntawm 90% kev tsis zoo elecium, thiab cov hluav taws xob tsis zoo yog cov ntshiab platinum xaim.

 

Qhov kom zoo dua ntawm qhov thermocouple no uas nws tuaj yeem npaj platinum rhodium alloy nrog kev ua kom yooj yim ntawm *, ua rau nws yooj yim rau kev ntsuas qhov tseeb. Nws tuaj yeem raug siv los ua kev siv thermocouple hauv qhov kub ntawm 630. 74-1064. 43 degree. Nws muaj lub cev thiab tshuaj ruaj khov thiab tsim nyog rau kev thov hauv oxidizing thiab nruab nrab cua ntsawj ntshab; Nws melting point yog siab, yog li qhov qis dua kev txwv ntawm ntsuas ntsuas kub kuj tseem siab. Hauv kev ntsuas kev lag luam, nws qee zaum siv los ntsuas kub siab dua 1000 degree, thiab tuaj yeem thov ib ntus thiab tsis tu ncua hauv qab 1300 degree. Luv luv lig ntsuas ntsuas tau tuaj yeem ncav cuag 1600 degree.

 

Qhov teeb meem nrog Platinum Rhodium / Platinum Thermocoup yog tias lawv kim thiab muaj lub peev xwm tsis muaj zog. Thaum siv nyob rau hauv atmospheres xws li restorative roj, hlau oxides, silicon oxides, thiab cov leej faj oxides, lawv tuaj yeem dhau los ua cov tshuaj tsis raug thiab hloov pauv sai. Yog li ntawd, thaum siv hauv cov cua no, yuav tsum tau ntxiv. Tsis tas li ntawd, cov kev ua haujlwm thermoelectric ntawm qhov thermocougle zoo li no, ua rau cov platinum molecules, ua rau cov platinum molecules, ua paug nws, ua rau muaj peev xwm ua rau muaj peev xwm ua tau.

 

[2] Nickel Chromium / Nickel silicon thermocouple - nrog kev sib faib hluav taws xob yog}}}}}}}}}% silicon,<0.6% chromium, and the others are nickel.

 

Qhov zoo ntawm hom ntawm thermocouple yog cov muaj zog oxidation thiab corrosion tsis kam, loj li tus nqi loj, thiab tus nqi qis ntawm cov ntaub ntawv thermal electrode. Nws tuaj yeem yog ib ntus thiab tsis tu ncua siv qis dua 1000 degree, thiab luv luv luv luv ntsuas kub tuaj yeem ncav tau 1300 degree.

 

Qhov teeb meem nrog Nickel chromium / nickel Silicon Thorko Thorroded thaum nthuav tawm cov xov xwm rov qab los ntawm qhov kub tshaj 500 degree thiab hauv cov neeg siv tshuaj lom neeg. Yog li, kev txij nkawm cov ntaub pua tsev yuav tsum tau ntxiv thaum ua haujlwm hauv cov cua no, thiab lawv qhov ntsuas kub thiab txias dua li platinum thermocoup.

 

[3] Nickel chromium / tooj liab thermocouple - nrog kev nyeem ntawv nickocouple yog}}}}. 4% silicon, thiab tus so yog npib tsib; Cov tsis zoo electrode muaj 56% tooj liab thiab 44% npib tsib xee.

 

Qhov txiaj ntsig loj tshaj plaws ntawm Nickel chromium / tooj liab thermocouple yog nws cov siab thermoelectric peev xwm thiab tus nqi tsawg. Qhov teeb meem nrog no thermocouple yog tias nws tsis tuaj yeem siv los ntsuas kev ntsuas cov kub tsawg. Nws qhov ntsuas kub qis yog 800 degree, thiab nws tsuas yog tsim nyog rau kev siv ib ntus hauv qab 600 degree. Ib qho ntxiv, vim muaj kev phom sij ntawm tooj liab alloys rau oxidation thiab kev tsis zoo, kev txij nkawm tsho yuav tsum tau nruab thaum thov.

 

[4] Platinum Rhodium 30 / Platinum Kev Rhodium 6 Thermocouple Qhov zoo electrode muaj 30% rho tawm thiab cov hluav taws xob tsis zoo muaj 6% rhodium. Lub dual Platinum Rhodium Thermocohole muaj zog los tiv thaiv kev ua kom muaj peev xwm thiab tseem muaj kev ruaj khov zoo thaum ntsuas kub txog 1800 degree. Nws muaj qhov ntsuas kub ntsuas qhov tseeb thiab yog cov tswv yim rau oxidizing thiab nruab nrab xov xwm. Nws tuaj yeem ua ntu zus thiab tsis tu ncua tsawg ntawm 1400-1600 kev ntsuas kev ntsuas, thiab cov sij hawm luv luv tuaj yeem ncav cuag 1800 degree.

 

Qhov rhiab heev ntawm dl Platinum Rhodium thermocouple yog cov qes, thiab cov ntsuas kev ua tau zoo nrog kev nkag siab zoo yuav tsum tau nruab thaum ua ntawv thov. Nyob rau hauv chav tsev kub, cov nyhuv ntawm qhov kub ntawm thermoelectric muaj peev xwm tsawg heev, yog li tsis tas yuav tsum nres qhov ntsuas kub hauv qee cov ntawv thov.

 

[5] tooj liab / constantan thermocouple - nrog ib qho kev faib tawm yog tooj liab, thiab qhov tsis zoo eldper yog ib qho alloy ntawm 60% Tooj liab / 40% npib tsib xee.

 

Nws cov txiaj ntsig suav nrog cov kub kub siab, yooj yim rov ua haujlwm ntawm thermoelectric sau, thiab muaj peev xwm ntsuas kub siab txog {{1} degree. Tab sis nws yog tus kheej yog tias tooj liab yog siv oxidation, yog li qee qhov kev txwv ntawm tus neeg tsis tshaj 300 degree.