Cov Khoom Siv Tshawb Fawb Tom Qab Cryogenic Cartridge Heater Reliability
Thaum xub thawj siab ib muag, lub tshuab rhaub cartridge zoo li yooj yim - lub raj hlau nrog cov xov hlau tawm. Tshem tawm sab nrauv uas tsis zoo, txawm li cas los xij, thiab muaj cov qauv tsim qauv tsim kom muaj sia nyob qhov kub thiab txias uas yuav ua kom puas cov khoom tsawg dua. Rau cov ntawv thov ntaus rho tawm 40 degrees Celsius lossis qis dua, txhua qhov kev xaiv khoom thiab cov kauj ruam tsim khoom yuav tsum tau ua tib zoo xav.
Cov txheej txheem tsim khoom pib nrog lub seamless stainless hlau raj, xaiv tsis yog rau corrosion kuj tab sis rau cov phab ntsa tuab tuab uas ua kom cov cua sov hloov mus ib yam. Cov hlau tsis kam - feem ntau NiCr 80/20 alloy rau nws cov yam ntxwv ruaj khov nyob thoob plaws qhov kub thiab txias - tau txais qhov raug mob ntawm cov tub ntxhais ceramic. Lub suab suab txiav txim siab watt ceev; tighter windings tsim kom kub dua ib chav tsev ntev. Rau cov ntawv txias- huab cua, cov chaw tsim khoom siv feem ntau siv cov qauv sib faib uas tshem tawm qhov kub thiab txias thaum tswj kom muaj cua sov txaus kom kov yeej cov xwm txheej puag ncig hnyav.
Cov khawv koob tiag tiag tshwm sim thaum lub sij hawm swaging. Tom qab muab lub qhov txhab tso rau hauv lub qhov txhab, cov kws kho mob sau qhov khoob nrog siab -purity magnesium oxide hmoov. Lub tshuab swaging xovxwm ces compresses lub rooj sib txoos, txo txoj kab uas hla los ntawm 8-10% thaum nce ceev. Qhov no tshem tawm cov hnab tshos huab cua uas yuav txwv tsis pub ua cov thermal insulators thiab muaj peev xwm ya raws. Lub compression kuj tsim kev sib raug zoo ntawm cov hlau tsis kam, rwb thaiv tsev, thiab sheath - qhov tseem ceeb rau kev hloov hluav taws xob. Cov cua sov swaged tsis zoo qhia qhov kub hloov pauv raws lawv qhov ntev; Cov chav ua haujlwm zoo tswj tau ntxiv lossis rho tawm 5 degrees Celsius uniformity txawm tias qhov tso zis ntau tshaj plaws.
Thaum ntsuam xyuas lub tshuab cua sov rau cov kev pabcuam cryogenic, lub tshuab cua sov lub tshuab cua sov ua rau qhov kev xaiv tseem ceeb. Ib qho - lub taub hau lub taub hau taub hau nrog lub tshuab cua sov lub taub hau ntawm 5-7 watts ib square centimeter sawv cev rau cov pov thawj kev daws teeb meem rau ntau yam ultra- daim ntawv thov kub tsawg. Qhov ntom ntom no muab cov cua kub txaus kom dhau los ua kom muaj cua sov ua kom muaj zog ntawm qhov chaw ib puag ncig cryogenic thaum zam cov cua sov hauv cheeb tsam uas rhuav tshem cov qauv tsim ntau dua.
Lead hlau txuas siv cov txheej txheem vuam tshwj xeeb es tsis yog crimping yooj yim. Nickel-manganese alloy davhlau ya nyob twg pins tiv thaiv thermal expansion sib txawv ntawm stainless sheath thiab tooj liab conductors. Lub vuam yuav tsum muaj sia nyob tsis yog qhov kub thiab txias ua haujlwm xwb, tab sis cov neeg kho tshuab kev ntxhov siab ntawm thermal cycling nruab nrab ntawm qhov kub ntawm 40 degrees thiab kev khiav hauj lwm kub ntawm 300-500 degrees Celsius. Qee cov qauv tsim suav nrog kev hloov pauv hloov pauv hloov pauv - stainless hlau hose lossis braid tiv thaiv - txhawm rau tiv thaiv kev ua haujlwm hnyav thiab tawg ntawm qhov kev ntxhov siab.
Kev kho deg ntxiv lwm txheej kev tiv thaiv. Passivation tshem tawm cov kab mob hlau los ntawm cov hlau tsis huv, kho cov chromium oxide txheej uas muab kev tiv thaiv corrosion. Rau cov zaub mov- qib lossis kev siv tshuaj kho mob, electropolishing tsim ib tus du, tsis yog - ntxeem tau qhov chaw uas tiv thaiv kab mob adhesion thaum txhim kho tshuaj tiv thaiv. Cov kev kho mob no ua pov thawj tshwj xeeb tshaj yog muaj txiaj ntsig nyob rau hauv qhov chaw txias qhov chaw uas condensation thiab tshuaj lom neeg sib xyaw ua ke los tua cov chaw tsis kho.
Kev tswj kev ua tau zoo rau huab cua sov- cov cua kub cua kub dhau mus dhau qhov ntsuas hluav taws xob yooj yim. Rwb thaiv tsev tiv thaiv kev ntsuas ntawm 500V DC txheeb xyuas qhov tseeb ntawm magnesium oxide sau - qhov tseem ceeb yuav tsum tshaj 500 MΩ ntawm 20 degrees Celsius, nrog rau degradation rau 50-100 MΩ ntawm kev khiav hauj lwm kub. Dielectric lub zog kuaj siv 1500V AC rau ib feeb yam tsis muaj kev puas tsuaj, lees paub qhov tsis muaj qhov tsis muaj dab tsi lossis muaj kab mob hauv cov rwb thaiv tsev. Kev ntsuas txias-pib simulates rho tawm 40℃tej yam kev mob, xyuas kom meej tias lub rhaub pib ntseeg tau yam tsis muaj kev puas tsuaj los ntawm thermal shock.
Dimensional tolerances tseem ceeb tshaj li feem ntau buyers paub. Lub rhaub tau teev tseg ntawm 16mm txoj kab uas hla tau ntsuas 15.98mm kom ntseeg tau tias haum rau hauv lub qhov remed. Ntev tolerances ntawm ntxiv los yog rho tawm 1 hli haum rau thermal expansion thaum tswj kom muaj kev koom tes nyob rau hauv lub rhuab thaiv. Rau siab - daim ntawv thov precision xws li semiconductor manufacturing los yog cov khoom siv kho mob, tshwj xeeb kam rau siab mus rau ntxiv los yog rho tawm 0.5mm yog ua tiav los ntawm centerless sib tsoo tom qab swaging.
