Kev lag luam feem ntau siv thermocouple thiab thermal ua haujlwm hom
Kev lag luam feem ntau siv thermocouple thiab thermal ua haujlwm hom? Nyob rau hauv cov ntaub ntawv ntawm
1) Platinum thiab rhodium 30 - Platinum thiab rhodium 6 thermocouple (hom B thermocouple) rau lub thawv kub thermocouple precious. Lub diameter ntawm lub ntsiab lus yog 0.5 hli, qhov txawv yog -0.015 hli. Cov tshuaj hu ua "electrode" (BP) yog platinum thiab rhodium alloy, uas yog 30% rhodium, 70% platinum, negative (BN) yog platinum thiab rhodium alloy, Cov pob zeb muaj li 6%, feem ntau yog hu ua platinum thiab rhodium thermocouple. Qhov ntev thermocouple ntev tshaj plaws ntawm 1600 ℃, lub sij hawm luv tshaj plaws ntawm 1800 ℃. B-hom thermocouple hauv thermocouple series nrog lub siab tshaj plaws, qhov zoo tshaj plaws stability, dav kub kub, ntev lub neej, kev kub siab txwv zoo. Haum siv nyob rau hauv oxidizing thiab inert atmospheres, tab sis kuj siv sij hawm luv luv nyob hauv lub tshuab nqus tsev, tab sis tsis nyob rau hauv ib qho chaw cua los yog hauv cov cua los yog hlau tsis sib haum xeeb. Ib qho tseem ceeb ntawm hom B thermocouple yog qhov nyiaj uas tsis yog yuav tsum tau ua nrog compensating ua vim tias thermoelectric zog tsawg dua 3μV ntawm qhov ntau ntawm 0 txog 50 ° C.
2) platinum thiab rhodium 10-platinum thermocouple (S-hom thermocouple) rau lub thawv kub thermocouple precious. Cov pa roj carbon dioxide muaj pes tsawg leeg yog cov platinum thiab rhodium alloy, uas muaj 10% rhodium, 90% platinum, thiab cov tsis zoo (SN) yog cov dawb huv platinum, thiab cov khoom pov thawj uas muaj cov tshuaj electrode (SP) 0.5 hli, qhov sib txawv yog -0.015 hli. Feem ntau hu ua platinum thiab rhodium thermocouple. Qhov ntev thermocouple ntev tshaj plaws ntawm 1300 ℃, lub sij hawm luv tshaj plaws ntawm 1600 ℃. S-hom thermocouple hauv thermocouple series nrog lub siab tshaj plaws, qhov zoo tshaj plaws stability, dav kub kub, ntev lub neej thiab lwm yam zoo. Nws lub cev, tshuaj muaj zog, thermoelectric stability thiab siab oxidation tsis haum, haum rau oxidizing thiab inert cua. Raws li tus S-hom thermocouple tau zoo heev tag nrho kev ua tau zoo, nyob rau hauv txoj kab nrog kev siv thoob ntiaj teb kev ntsuas kub S-hom thermocouple, tau ntev lawm qhov kev ntsuas kub thoob ntiaj teb tus txheej txheem
3) Nickel-chromium-nickel-silicon thermocouple Lub thermocouple (sub-degree K) nyob rau hauv nickel-chromium zoo, nickel silicon yog tsis zoo; ntsuas ntau ntawm -50-1000 ℃, ntsuas ntu 1200 ℃; Kev siv cov nyiaj npib nruab nrab ntawm kev sib deev, 500 ℃ qis tshaj qhov ntsuas kub tsawg, tuaj yeem raug siv los txo qhov ntsuas kev ntsuas. Qhov thermocouple thermoelectric zog, zoo linearity, dav kub ntau, tsawg tus nqi, thiab yog li dav siv. 4) Ni-chrome thiab thermocouple thermocouple thermocouple thermocouple (sub-degree XK) nyob rau hauv cov cistode nickel-chromium zoo, copper copper rau qhov tsis zoo; tsim nyog rau kev siv los yog nruab nrab nruab nrab siv; ntsuas ntau ntawm -50-600 ℃, Ntev luv ntsuas 800 ℃; thermocouple thermoelectric fais fab loj tshaj thickocou-chromium-nickel thermocouple txog ob zaug; pheej yig. Qhov tsis zoo yog tias qhov ntsuas kub tsis siab. Feem ntau tsis tuaj yeem hloov tau. Tsis tas li ntawd. Lub tooj hlau tooj yog yooj yim oxidized thiab deteriorated, thiab cov khoom yog nyuaj thiab nyuaj kom tau txais ib lub teeb nruab. Cov thermocouple no yuav raug tshem tawm los ntawm thoob ntiaj teb. Kev siv cov nickel-chromium tooj liab nickel (pob kws) (sub-degree E) thermocouple los hloov lub thermocouple.
Tsis tas li ntawd, muaj ntau cov thermocouples rau ntau yam kev siv tshwj xeeb. Xws li lub thawv ntiag tug ntais hluav taws xob; rau 2000 ℃ siab kub ntsuas ntawm tungsten rhenium thermocouple
Kev lag luam feem ntau siv thermal ua haujlwm: los ntawm qhov kev hloov nrog qhov kev hloov ntawm qhov kub, feem ntau ntawm cov hlau hlau muaj qhov cuab yeej no, tiam sis tsis yog txhua yam siv tau ua thermal ua haujlwm, thermal ua hauj lwm raws li ib cov khoom siv hlau Yam yuav tsum: loj li tau thiab ruaj khov kub cev coefficient, lub cev tiv thaiv kom loj (hauv tib lub rhiab kom txo tau qhov loj ntawm lub sensor), nyob rau hauv kev siv ntawm qhov kub ntau muaj ib tug ruaj tshuaj thiab lub cev muaj zog, zoo daim qauv ntawm cov khoom, qhov tsis tseem ceeb nrog kub hloov ib qhov muaj nuj nqi muaj nuj nqi (Zoo tshaj hauv kev sib raug zoo). PT100 thermal tsis kam yog lub platinum thermal tsis kam, nws cov hauj lwm yog proportional rau qhov kub hloov. Tus PT100 kuj muaj feem xyuam rau qhov kub hloov: nws tsis ua hauj lwm yog 100 ohms thaum PT100 kub yog 0 ° C thiab nws tsis ua hauj lwm li ntawm 100 ° C txog 138.5 ohms. Nws cov hauv paus ntsiab lus: thaum lub PT100 ntawm 0 degrees Celsius thaum nws tsis ua haujlwm yog 100 ohms, nws lub zog yuav nce nrog qhov kub ntawm qhov kev loj hlob zoo. Hauv kev sib piv, thermistor kub coefficient ntau dua, qhov tsis haum ntawm chav tsev kub dua (feem ntau ntawm cov txhiab tus euros lossis ntau dua), tab sis kev sib hloov tsis zoo, tsis yog-linear loj heev ntawm tsuas yog -50 ~ 300 ℃, ntawm cov cuab yeej siv hauv tsev thiab tsheb kub nyhiab thiab tswj xyuas. Kev thermal hlau yog feem ntau muaj feem xyuam rau qhov ntsuas kub ntawm -200 ~ 500 ℃, uas yog qhov kev ntsuas, kev ruaj siab zoo, txhim khu kev ua tau zoo, nyob rau hauv tus txheej txheem ntawm kev tswj yog tsis ntev heev. Raws li cov nqi kuj yuav muab faib ua Cu50, Pt10, Pt100, Pt1000, thiab lwm yam., Raws li cov qauv ua haujlwm tau muab faib, ua kom thermal ua haujlwm, armored thermal ua hauj, thermal ua hauj lwm, thermal ua hauj, thermal thaiv , Ua haujlwm, thermal ua haujlwm, thermal ua haujlwm, thermal ua hauj lwm, thiab lwm yam., Lub cev kub yog faib ua mica kuj, ceramic ua hauj, import kuj yam, tsis kam muab faib ua ob-xaim cev, peb-xaim cev, plaub-xaim cev.
