Qhov "ib zaug-tiav txhuas" tsim ntawm lub tshuab cua sov yog ib qho qauv rau cov khoom cua sov, uas yog tsom rau txhua qhov kev sib txuas hluav taws xob ntawm ib kawg ntawm lub rhaub thaum lwm qhov kawg yog hermetically kaw. Qhov kev tsim no muaj qhov zoo hauv qhov chaw- txwv tsis pub los yog kev taw qhia kev teeb tsa. Hauv qab no yog cov ncauj lus kom ntxaws txog plaub yam: kev teeb tsa hauv cov kab hluav taws xob sab hauv, kev siv cov txheej txheem, kev xav txog kev tsim, thiab kev siv ib txwm.
I. Kev soj ntsuam ntawm Sab Hauv Cov Hlau Hlau
Lub hauv paus tseem ceeb ntawm "ib zaug-tiav txhuas" tsim nyob rau hauv kev sib xyaw ua ke ntawm cov cua sov xaim, cov ntaub ntawv rwb thaiv tsev, cov hlau lead, thiab lwm yam khoom ntawm ib qho kawg. Nws cov qauv sab hauv tuaj yeem muab faib ua qhov tseem ceeb hauv qab no:
1. Cua sov hlau Winding thiab kho
Cov hlau cua sov (feem ntau yog npib tsib xee-chromium lossis hlau-chromium-aluminium alloy) yog uniformly coiled rau hauv ib tug kauv nyob ib ncig ntawm lub hauv paus hlau txhawb pas nrig (xws li, stainless hlau raj) thiab tsau los ntawm siab - zaus vuam los yog mechanical crimping. Ob qhov kawg ntawm cov cua sov xaim txuas mus rau cov hlau lead- tawm ntawm qhov kawg ntawm lub rhaub thiab txuas mus rau cov coj. Txhawm rau kom ntseeg tau tias cov cua sov tsis sib xws, lub suab nrov thiab qhov nro yuav tsum tau tswj nruj me ntsis.
2. Rwb thaiv tsev txheej filling
High-purity magnesium oxide (MgO) hmoov yog ntim ntawm cov cua sov xaim thiab lub plhaub hlau, ua haujlwm ob qho tib si hauv nruab nrab insulating thiab cua sov-cov khoom siv. Magnesium oxide yuav tsum tau ntim rau hauv siab (feem ntau yog 20-30MPa), thiab cov phab ntsa ntawm lub raj yog nruj nreem khi rau cov qauv sab hauv los ntawm cov txheej txheem ntawm lub raj kom tsis txhob degradation ntawm rwb thaiv tsev kev ua tau zoo vim thermal expansion.
3. Kev sib txuas ua ke thiab sealing
Qhov kawg ntawm cov cua sov xaim txuas nrog siab -kub- cov khoom tiv thaiv (xws li, npib tsib xee hlau lossis npib tsib xee-plated tooj liab xaim) ntawm brazing lossis crimping. Cov hlau lead dhau los ntawm ceramic insulators lossis iav -sintered seals thiab txuas mus rau sab nraud ntawm cov hlau lead- tawm kawg. Cov khoom sib khi yuav tsum tiv taus qhov kub thiab txias (feem ntau ntau dua lossis sib npaug li 400 degree) thiab muaj cov dej tsis zoo thiab cov dej noo{10}} cov khoom pov thawj. Cov txheej txheem muaj xws li:
Iav-hlau sealing: Molten iav ua ib lub foob hermetic nrog cov hlau ua rau kub kub.
Ceramic sealing: Alumina ceramic rings yog thermally pressed nrog hlau qhov chaw rau sealing.
4. Xaus Sealing Structure
Qhov tsis yog- txhuas qhov kawg yog kaw los ntawm cov tshuab crimping lossis argon arc vuam, thiab sab hauv yog ntim nrog magnesium oxide hmoov kom cais cov huab cua thiab tiv thaiv oxidation ntawm cov cua sov hlau. Qee cov qauv kub siab -cov qauv ntsuas kub ntxiv cov dab dej kub lossis cov hlau txuas ntawm qhov kawg no txhawm rau txhim kho cov khoom siv dag zog.
II. Cov txheej txheem tseem ceeb siv
1. Tube Shrinking txheej txheem
Cov hlau raj txoj kab uas hla yog txo los ntawm txias shrinking los yog kub shrinking tshuab, nce qhov ceev ntawm magnesium oxide hmoov rau ntau tshaj 90% ntawm tus nqi theoretical. Cov kauj ruam no ncaj qha cuam tshuam rau lub zog rwb thaiv tsev thiab kev hloov hluav taws xob hloov hluav taws xob.
2. Kev kuaj kev laus
Cov khoom tiav tau txais lub zog- ntawm kev laus (piv txwv li, 1.5x ntsuas qhov ntsuas hluav taws xob) thiab kev ntsuas hluav taws xob tiv thaiv hluav taws xob (Ntau dua lossis sib npaug ntawm 100MΩ / 500VDC) kom ntseeg tau tias tsis muaj kev cuam tshuam luv luv lossis xau txaus ntshai.
3. Moisture-Kev kho pov thawj
Rau cov cua sov uas siv nyob rau hauv qhov chaw ntub dej, cov hlau lead- tawm kawg yog coated nrog silica gel los yog epoxy resin, los yog ib tug tag nrho cov vuam qauv raug saws.
III. Tsim kev xav thiab optimization
1. Thermal Stress Compensation
Vim yog ib qho - kawg fixation, linear expansion ntawm cov hlau raj thaum cua sov (kwv yees li 1-2mm / m ib 100 degree) yuav tsum tau txiav txim siab. Kev ntsuas tsim muaj xws li:
Reserving expansion qhov khoob.
Siv lub corrugated raj qauv los nqus deformation.
2. Lead Temperature Resistance Level
Cov txheej rwb thaiv tsev ntawm cov hlau lead yuav tsum sib haum rau qhov kev ua haujlwm kub (xws li, silicone roj hmab xaim withstands 180 degree, PTFE hlau withstands 260 degree). Rau siab- qhov kub thiab txias, mica wrapping lossis inorganic fiber rwb thaiv tsev tuaj yeem siv tau.
3. Lub zog ceev tswj
Kev tsim ib zaug - xaus yuav tsum zam kom tsis txhob muaj cua sov hauv zos, thiab qhov chaw thauj khoom feem ntau yog txwv rau:
Cov cua sov qhuav: Tsawg dua lossis sib npaug li 5W / cm².
Ua kua cua sov: Tsawg dua lossis sib npaug li 15W / cm² (nyob ntawm qhov nruab nrab ntws).
IV. Hom Daim Ntawv Thov Scenarios
1. Pwm cua sov
Embedded nyob rau hauv lub grooves ntawm txhaj tshuaj pwm, cov hlau lead- tawm kawg yog raug rau centralized thaiv, nrog ib tug khiav hauj lwm kub feem ntau ncav cuag 300-500 degree.
2. Cov khoom ntim khoom
Siv los ua cua sov- foob riam cua sov, ib qho - tas cov hlau lead ua kom yooj yim xaim rau cov khoom txav.
3. Cov khoom siv hauv chav kuaj
Xws li qhov tsis tu ncua -kub hlau da dej, cov qauv compact ua tau raws li qhov yuav tsum tau ua ntawm miniaturization.
Cov ntsiab lus
Qhov "ib zaug-tau tag nrho" tsim ntawm cov khoom siv hluav taws xob ua kom muaj qhov sib npaug ntawm kev ntseeg siab, kev teeb tsa yooj yim, thiab kev pab lub neej ntev los ntawm kev ua kom zoo dua qub thiab tswj cov txheej txheem. Nws cov thev naus laus zis tseem ceeb nyob hauv kev ruaj ntseg ntawm cov rwb thaiv tsev sab hauv thiab kev sib khi, nrog rau kev ua kom zoo ntawm kev tswj xyuas thermal. Kev xaiv cov khoom siv thiab cov txheej txheem yuav tsum tau hloov kho raws li kev thov tshwj xeeb scenarios. Future development trends include the integration of higher power density ceramic heating elements and intelligent temperature feedback in innovative designs.
