"Kev faib tus lej" txhais li cas rau cov thermocouples thiab ntsuas ntsuas kub?
Kev faib cov naj npawb ntawm cov thermocouples feem ntau suav nrog S R B, N, K, E, J, T, thiab lwm yam. Ntawm lawv, S R. B belongs rau cov hlau zoo nkauj thermocouples, N. K, E, J, thiab T yog pheej yig. hlau thermocouples.
Cov yam ntxwv ntawm S qib yog muaj zog antioxidant kev ua tau zoo, thiab nws yog tsim rau kev siv tas li hauv oxidizing thiab inert cua. Lub sijhawm siv sijhawm ntev yog 1400 degree, thiab siv sijhawm luv luv yog 1600 degree. Ntawm tag nrho cov thermocouples, Qhov tseeb ntawm S-scale yog qhov siab tshaj plaws thiab feem ntau yog siv los ua tus qauv thermocouple;
Piv nrog rau S Performance index, R Performance index muaj lub thermal electromotive quab yuam uas yog li 15% siab dua, thiab nws lwm yam kev ua tau zoo yuav luag zoo tib yam;
Lub thermal electromotive quab yuam ntawm B Performance index yog tsawg heev nyob rau hauv chav tsev kub, yog li nyiaj them nyob ntawm tej feem ntau tsis xav tau thaum ntsuas. Nws lub sijhawm siv sijhawm ntev yog 1600 degree thiab siv sijhawm luv luv yog 1800 degree. Nws tuaj yeem siv rau hauv oxidizing lossis nruab nrab cua, nrog rau kev siv sijhawm luv luv hauv lub tshuab nqus tsev.
Cov yam ntxwv ntawm N-qib thermocouple yog qhov muaj zog kub oxidation tsis kam ntawm 1300 degree, kev ruaj ntseg ntev ntawm cov thermoelectric quab yuam thiab kev tsim tawm ntawm lub sij hawm luv luv thermal, zoo tiv thaiv hluav taws xob hluav taws xob thiab qhov kub thiab txias, thiab tuaj yeem hloov tau ib nrab. S-qib thermocouple;
Tus yam ntxwv ntawm K scale yog muaj zog antioxidant kev ua tau zoo, thiab nws yog haum rau kev siv tas li nyob rau hauv oxidizing thiab inert cua. Kev siv lub sijhawm ntev kub yog 1000 degree, thiab siv sijhawm luv luv yog 1200 degree. Dav siv nyob rau hauv tag nrho cov thermocouples;
Tus yam ntxwv ntawm E-scale yog tias nyob rau hauv feem ntau siv thermocouples, nws cov thermoelectric electromotive quab yuam * yog loj, uas yog, nws rhiab heev * yog siab. Nws raug nquahu kom siv tsis tu ncua hauv oxidizing thiab inert cua ntawm qhov kub ntawm 0-800 degree ;
Cov yam ntxwv ntawm J-qib yog tias nws tuaj yeem siv rau hauv ob qho tib si oxidizing cua (nrog rau qhov kub siab tshaj ntawm 750 degree) thiab txo cov cua sov (nrog rau qhov kub siab tshaj ntawm 950 degree), thiab tiv taus H2 thiab CO roj corrosion. Nws feem ntau yog siv rau hauv refining thiab tshuaj lom neeg kev lag luam;
Tus yam ntxwv ntawm T-scale yog hais tias nws muaj ib tug high degree ntsuas ntawm tag nrho cov pheej yig hlau thermocouples thiab feem ntau yog siv los ntsuas kub hauv qab no 300 degree.
