Kev xaiv cov khoom - Sheath thiab rwb thaiv tsev rau DC Powered Cartridge rhaub
Lub tshuab cua sov tsis ua haujlwm hauv qhov chaw ntub dej tom qab tsuas yog peb lub hlis. Lwm tus qauv zoo ib yam khiav tau ntau xyoo hauv lub tshuab huv, qhuav. Qhov sib txawv feem ntau yog cov khoom siv ntawm cov ntaub thaiv sab nrauv thiab qhov zoo ntawm cov rwb thaiv tsev sab hauv. Rau ibDC powered cartridge rhaub, kev xaiv cov khoom siv tsis yog qhov kev xav tom qab - nws yog kev txiav txim siab txog txoj sia lossis kev tuag rau cov khoom.
Cov khoom siv sheath feem ntau yog stainless hlau. Qib 304 ua haujlwm rau kev siv huv, qhuav mus txog 400 degree. Qib 316 ntxiv molybdenum rau kev txhim kho cov tshuaj chlorides thiab cov kua qaub me me. Txawm li cas los xij, acartridge rhaub[cartridge rhaub] nrog lub hau stainless hlau yuav corrode sai heev nyob rau hauv lub xub ntiag ntawm chlorinated tshuaj ntxuav, ntsev tsuag, los yog kua qaub fumes. Thaum lub plhaub corrodes los ntawm, noo noo mus txog MgO rwb thaiv tsev, ua rau hauv av txhaum. Hauv DC cov tshuab, qhov ua txhaum hauv av tuaj yeem ua rau muaj kev phom sij tshwj xeeb vim tias DC arcs nyuaj rau tua dua li AC arcs. Rau corrosive ib puag ncig, Incoloy 800 lossis 840 yog qhov kev xaiv zoo dua - nws tiv taus qhov kub txog 800℃thiab tiv thaiv oxidation thiab ntau yam tshuaj.
Rau cov ntawv thov uas xav tau qhov kub thiab txias heev (tshaj li 800 degree), tsis muaj dab tsi ntaus cov nickel-chromium alloy sheath xws li Inconel 600.DC powered cartridge rhaubnrog Inconel sheath tuaj yeem khiav tsis tu ncua ntawm 950℃hauv huab cua. Tab sis qhov no los ntawm tus nqi - Inconel yog kim thiab nyuaj rau tshuab. Rau feem ntau cov ntawv thov kev lag luam niaj hnub hauv qab 600 degree, stainless hlau 304 lossis 316 yog qhov tsim nyog yog tias ib puag ncig tswj tau.
Yuav ua li cas yog tooj liab los yog tooj dag sheaths? Acartridge rhaub[cartridge rhaub] nrog lub plhaub tooj liab muab cov thermal conductivity zoo heev - kwv yees li tsib npaug ntawm cov hlau tsis muaj steel. Qhov no tso cai rau lub rhaub kom hloov cov cua sov rau hauv cov khoom nyob ib puag ncig zoo dua, txo qhov kub thiab txias hauv lub neej. Txawm li cas los xij, tooj liab oxidizes sai dua 300℃thiab softens saum 200 degree. Siv tooj liab tsuas yog rau cov ntawv thov kub qis (qis dua 150 degree) xws li cov roj teeb ua kom sov lossis cov kua dej. Brass muaj cov kev txwv zoo sib xws.
Tam sim no xav txog kev rwb thaiv tsev sab hauv. Yuav luag tag nrhoDC powered cartridge rhaubcov khoom siv magnesium oxide (MgO) ua cov muab tub lim. Tsis yog txhua tus MgO sib npaug. High-qib MgO yog compacted ntawm siab tshaj 5000 psi, ua tiav ib tug ceev ntawm ib ncig ntawm 85-90% ntawm theoretical siab tshaj plaws. Qib qis MgO muaj cov voids uas cuab cua lossis ya raws. Thaum lub tshuab hluav taws xob siv hluav taws xob, cov dej ntws nkag mus rau hauv chav thiab tawg MgO, ua rau luv luv. Ib qho zoocartridge rhaub[cartridge rhaub] yuav qhia tias "low-hygroscopic MgO" kho nrog silicone lossis lwm yam txheej hydrophobic. Qhov no tseem ceeb heev rau DC systems uas yuav khaws cia rau hauv txias, ntub warehouses ua ntej installation.
Lwm cov ntsiab lus sab hauv: cov hlau tsis kam. FeCrAl (hlau-chromium-aluminium) xov hlau, xws li Kanthal, muaj ntau nyob rau hauv cov qauv cua sov. Lawv ua haujlwm zoo tab sis ua nkig tom qab ntau lub voj voog thermal. Rau DC daim ntawv thov uas lub tshuab cua sov nyob twj ywm rau lub sijhawm ntev (tsawg lub voj voog), FeCrAl yog qhov zoo. Rau kev caij tsheb kauj vab ntau zaus lossis PWM tswj, NiCr 80/20 (80% nickel, 20% chromium) yog qhov zoo dua - nws tseem muaj zog thiab tiv thaiv kev loj hlob ntawm cov nplej, muab nws lub neej ntev zog. ADC powered cartridge rhaubnrog NiCr hlau tuaj yeem siv tau yooj yim ob zaug ntev npaum li ib qho nrog FeCrAl hauv kev caij tsheb kauj vab.
Cov lus qhia tswv yim los ntawm kev xa rov qab: tsis txhob quav ntsej cov khoom siv txiav. Cov pins lossis cov hlau lead uas tawm hauv lub tshuab cua sov feem ntau yog ua los ntawm npib tsib xee-plated steel lossis npib tsib xee ntshiab. Yog tiascartridge rhaubyog siv nyob rau hauv ib qho chaw ntub dej los yog tshuaj lom neeg ua haujlwm, cov pins tuaj yeem corrode thiab tawg. Qhia meej nickel-plated tooj liab pins rau high-tam sim no DC daim ntawv thov (txo tsis kam cua sov thaum lub sij hawm txiav) los yog khoom nickel pins rau high-temperature ib puag ncig. Tsis tas li ntawd, lub foob qhov twg pins tawm ntawm lub sheath yog qhov tseem ceeb. Lub silicone roj hmab foob ua haujlwm rau qhov kub thiab txias hauv qab 200 degree. Nyob rau hauv tas li ntawd, ib tug ceramic hlaws foob los yog compression iav foob yog tsim nyog.
Wrap-up: ib puag ncig dictates lub sheath. Qhov kub siab xav tau Incoloy lossis Inconel. Corrosive tej yam kev mob xav tau 316 stainless los yog zoo dua. Rau huv, qhuav, nruab nrab kub (hauv qab 400 degree), 304 stainless yog zoo kawg nkaus txaus. Sab hauv kev tsim kho zoo - ntom, hydrophobic MgO thiab ductile NiCr hlau - cais acartridge rhaub[cartridge rhaub] uas kav ntau xyoo los ntawm ib qho uas ua tsis tau hauv lub hlis. Cov txheej txheem sib txawv (khoom noj khoom haus, tshuaj lom neeg, tsheb, kev kho mob) txhua tus muaj lawv tus kheej cov khoom siv sib raug zoo, thiab kev sib piv cov khoom siv cua sov rau hauv daim ntawv thov yog ib qho tseem ceeb engineering kauj ruam uas tsis tuaj yeem hla.
