Cov Khoom Siv Kev Tshawb Fawb Tom Qab -50℃Cartridge Heater Reliability
Kev xaiv cov khoom txiav txim siab seb puas yog ib qho - lub taub hau hluav taws xob cua sov raj muaj sia nyob nws thawj lub caij ntuj no hauv thaj teb lossis ua tsis tiav hauv lub lis piam. Qhov sib txawv ntawm kev ua tiav thiab tsis ua haujlwm ntawm -50℃los ntawm kev nkag siab tias cov hlau thiab cov insulators coj li cas thaum qhov kub thiab txias poob mus rau qhov chaw uas cov hlau ua nkig thiab cov ntsaws ruaj ruaj tig pob zeb nyuaj.
Cov ductile-rau- qhov kub hloov pauv hloov pauv yog lub tswv yim uas txhua tus kws ua haujlwm ua haujlwm nrog txias- cov khoom siv huab cua yuav tsum nkag siab. Cov ntaub ntawv uas muaj zog thiab hloov tau ntawm chav tsev kub yuav tsis muaj zog thiab tawg tau thaum kub poob mus rau -40 degree. Qhov no tsis yog ib qho kev hloov pauv zuj zus - nws yog qhov pib tshwm sim uas tuaj yeem hloov cov khoom siv txhim khu kev qha rau hauv kev lav phib xaub hmo ntuj.
Lub cev-cented cubic siv lead ua qauv, pom nyob rau hauv ntau hom hlau alloys, dhau qhov kev hloov pauv ntawm qhov kub siab tshaj -50℃. Lub ntsej muag-centred cubic crystal formations, ib txwm ntawm austenitic stainless hlau, tuav lawv cov ductility thiab tawg toughness txawm nyob rau ntawm -196 degree. Qhov sib txawv crystallographic tseem ceeb no piav qhia vim li cas qee cov ntaub ntawv tsis ua rau txias thaum lwm tus ua tau zoo.
Stainless hlau 304, dav siv nyob rau hauv kev lag luam cua sov daim ntaub ntawv, ua tsis tshua muaj ductile nyob ib ncig ntawm -40℃thiab tej zaum yuav tawg thaum raug thermal shock. Stainless hlau 316L muaj kev ua tau zoo dua vim tias nws cov ntsiab lus nickel ntau dua thiab cov ntsiab lus qis dua khaws cov khoom siv zoo los ntawm qhov kub thiab txias. Rau cov ntawv thov uas xav tau tshaj plaws, Inconel 600 lossis 625 alloys muab qhov tshwj xeeb tiv thaiv rau thermal qaug zog thiab tswj lawv cov duab thaum kub ntawm lub voj voog ntawm cov qib cryogenic mus txog 500 degree.
Cov hlau tsis kam nws tus kheej nthuav tawm nws tus kheej cov khoom sib tw. Nickel-chromium alloy NiCr 80/20, tus qauv kev lag luam rau cov khoom siv hluav taws xob tiv thaiv cov khoom siv hluav taws xob, yuav tsum ua kom pom cov khoom hluav taws xob ruaj khov thoob plaws txhua qhov kev ua haujlwm kub. Qhov tseem ceeb ntawm kev tiv thaiv yuav tsum nyob twj ywm tsis tu ncua seb cov hlau pib los ntawm cov kab mob cryogenic lossis ua haujlwm ntawm nws qhov ntsuas kub siab tshaj plaws. Qhov kev ruaj ntseg no tsis tau lees paub - cov khoom sib txawv ntawm cov alloy muaj qhov sib txawv ntawm qhov sib txawv ntawm qhov kub thiab txias, thiab kev xaiv tsis raug tuaj yeem ua rau kev ua haujlwm tsis zoo.
Magnesium oxide rwb thaiv tsev plays lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm lub tshuab cua sov ntawm qhov kub qis. High- ntom ntom magnesium oxide muab ob qho tib si hluav taws xob cais thiab thermal conductivity ntawm cov hlau coil tiv thaiv thiab cov hlau sheath. Ntawm qhov kub thiab txias, qhov purity thiab compaction ntawm cov rwb thaiv tsev no ua qhov tseem ceeb tshaj. Txhua qhov dej ntws tawm thaum lub sijhawm tsim khoom yuav khov thiab nthuav dav, ua rau cov yam ntxwv ntawm dielectric puas lossis ua rau micro- pob txha hauv lub hnab.
Cov tuam txhab hwm hwm daws qhov kev txhawj xeeb no los ntawm kev tsim kho swaged uas compress magnesium oxide hmoov kom siab tshaj plaws. Qhov no tshem tawm qhov sib txawv qhov twg condensation tuaj yeem sib sau ua ke thiab ua kom pom kev hloov pauv ntawm cov cua sov txawm tias qhov kub sab nraud sim rub tawm cov cua sov. Lub tshuab nqus tsev- ua haujlwm puv tshem tawm cov hnab ntim huab cua uas cov dej noo tuaj yeem tsim, thiab ci - tawm cov txheej txheem tom qab kev tsim khoom kom ntseeg tau tias cov khoom seem yuav raug tshem tawm ua ntej xa khoom.
Thermal contraction nthuav tawm lwm qhov kev xav txog cov khoom siv uas feem ntau underestimated. Qhov sib txawv ntawm kev cog lus ntawm lub tshuab rhaub cua sov, rwb thaiv tsev, thiab cov xaim hluav taws xob ua rau lub zog sab hauv uas cov qauv tsim tsis tuaj yeem ua tau. Los ntawm chav tsev kub rau cov kua nitrogen kub, stainless hlau cog lus kwv yees li 0.3%, thaum Inconel alloys cog lus li ntawm 0.2%. Qhov sib txawv no, txawm tias zoo li me me, ua rau muaj kev ntxhov siab loj ntawm cov khoom siv sib cuam tshuam.
Cov qauv tshwj xeeb sab hauv daws cov teeb meem kev cog lus no. Flexible coil txhawb kom haum rau qhov sib txawv txav. Raws li rwb thaiv tsev packing absorbs dimensional hloov. Tsim clearances tiv thaiv kev khi. Cov yam ntxwv no, tsis tuaj yeem los ntawm tus qauv cartridge rhaub, ua rau qhov sib txawv ntawm lub tshuab cua sov uas muaj sia nyob thermal cycling thiab ib qho uas tsis muaj kev ntxhov siab ntau ntxiv.
Kev paub nrog kev ua tsis tiav hauv cheeb tsam qhia txog tus qauv. Feem ntau yog vim li cas rau lub tshuab hluav taws xob thaum ntxov tsis ua hauj lwm ntawm qhov kub thiab txias tsis yog hluav taws xob ntau dhau lossis kev tsim khoom tsis raug - nws yog cov khoom siv tsis sib haum nrog ib puag ncig kev ua haujlwm. Cov ntaub ntawv txheem uas ua tau zoo ntawm chav tsev kub tsuas yog tsis tuaj yeem tswj hwm lawv cov khoom ntawm -50 degree. Xaiv txoj cai sheath alloy, tiv thaiv hlau muaj pes tsawg leeg, thiab qib rwb thaiv tsev yuav tsum tau nkag siab tsis yog lub hom phiaj ntawm qhov kub thiab txias, tab sis kuj yog cov qauv thermal cycling, ya raws, thiab cov neeg kho tshuab kev nyuaj siab lub rhaub yuav ntsib.
Rau cov ntawv thov uas tsis muaj kev ntseeg siab tsis yog- sib tham - cov roj av Arctic, cov chaw tshawb fawb cryogenic, cov chaw muag tshuaj txias chain logistics - cov khoom siv tau ua thaum lub sijhawm tshwj xeeb txiav txim siab seb cov khoom puas ua haujlwm rau xyoo lossis ua tsis tiav hauv lub hlis. Lub tshuab cua sov cartridge tsim los rau ultra- lub luag haujlwm kub qis siv cov ntaub ntawv xaiv tshwj xeeb rau lawv qhov kev ua tau zoo thaum txias txias, tsis yog cov khoom xaiv rau kev siv dav dav - lub hom phiaj.
