Dab tsi yog cov cim qhia txog kev ua tsis tiav ntawm qhov khoov ntawm PTFE Immersion Heater?

Lub tshuab cua sov uas zoo li qhov muag liab qab tuaj yeem ua rau poob ntawm qhov khoov. Kev tshuaj xyuas niaj hnub tuaj yeem nthuav tawm cov teeb pom kev tsis pom kev uas yuav tsum tau hloov pauv ua ntej xau lossis hluav taws xob teeb meem cuam tshuam kev ua haujlwm. Qhov khoov ntawm PTFE immersion rhaub yog feem ntau mechanically thiab thermally strained ib feem ntawm lub immersion rhaub. Nws tseem yog qhov chaw nyob qhov twg thawj qhov ntsuas tsis ua haujlwm hauv khoov PTFE immersion heater Cheebtsam raug soj ntsuam. Paub tias yuav nrhiav dab tsi - thiab ntawm qhov loj npaum li cas - tuaj yeem tig qhov kev tawm tsam cuam tshuam rau hauv kev npaj, tswj kev hloov pauv.

Vim Li Cas Khoov yog Qhov Chaw Ua Haujlwm Tseem Ceeb
Nyob rau hauv kev pab cuam, ib tug khoov PTFE rhaub lub caij yog raug rau peb ib txhij kev nyuaj siab: residual mechanical strain los ntawm cov txheej txheem dabtsi yog khoov, thermal expansion thiab contraction cycles, thiab dielectric kev nyuaj siab los ntawm lub internal kuj hlau. Thiab nyob rau lub sij hawm no cov kab mob sib sau. Micro- tawg tuaj yeem tsim hauv PTFE sheath thaum khoov. Cov chaw kub kub hauv zos tuaj yeem tsim nyob rau hauv cov hlau sab hauv thaum khoov. Tshuaj tua kab mob tuaj yeem ua kom nrawm nrawm ntawm lub voj voog sab nraud ntawm qhov khoov. Hmoov zoo, muaj ntau qhov pom thiab cov lus qhia hluav taws xob ua ntej kev tawg tag.

Cov Ntsiab Lus Ceeb Toom Pom Pom ntawm Khoov
Kev puas tsuaj thaum ntxov tuaj yeem tshwm sim los ntawm kev kuaj pom yooj yim thaum lub sij hawm tu. Kev tshuaj xyuas yuav tsum tau ua rau ntawm qhov khoov, nyiam dua nrog lub teeb txaus thiab lub iav magnifying. Feem ntau cov precursors rau tsis ua hauj lwm yog cov tsos mob hauv qab no.

1. Nto Crazing (Fine Crack Networks)
Nto crazing yog tshwm sim raws li ib tug network ntawm me me, ntiav, hairline kab nrib pleb nyob rau hauv lub sab nrauv vojvoog ntawm qhov khoov. Cov crazing feem ntau zoo li cov av nkos qhuav tawg, lossis kab laug sab web qauv. Cov fissures feem ntau me me dhau los pom ntawm qhov muag liab qab, tab sis pom tau yooj yim ntawm 10 × lossis siab dua magnification. Crazing txhais tau hais tias PTFE polymer chains tau overstretched thiab tau tawg hauv zos. Thaum crazing tau pib, qhov tawg qhov tob tuaj yeem nce nrog thermal cycling kom txog thaum nws mus txog rau hauv cov hlau tsis kam thiab ua rau luv luv Circuit Court lossis hauv av txhaum.

2. Discoloration (xim av, dub lossis daj)
Lub PTFE sheath uas feem ntau yog dawb los yog tawm -dawb thiab qhia cov xim av, xim dub, los yog daj daj nyob rau ntawm qhov khoov qhia tias muaj cua sov hauv zos. Qhov kub tshaj qhov no feem ntau yog tshwm sim los ntawm qhov chaw kub ntawm cov hlau tsis kam, feem ntau yog tsim los ntawm kev khoov nruj ntawm cov hlau uas ncab lossis bunched cov hlau. Discoloration yog ib qho qhia tias PTFE tab tom pib thermally deteriorate. Thaum cov xim ploj lawm, cov khoom poob nws lub zog thiab nws cov dielectric zoo. Txhua lub tshuab cua sov uas pom tias muaj qhov tsaus ntuj ntawm qhov khoov yuav tsum raug tshem tawm ntawm kev ua haujlwm tam sim ntawd vim tias cov hlau sab hauv yuav nyob ze rau nws qhov kev tawg lawm.

3. Cov pob khaus lossis o
o yog ib qho chaw siab thiab squishy lossis spongy ntawm khoov. Blistering yog ib hom kev tshaj lij thaum pom cov npuas lossis lub hnab ntim tau tsim ntawm PTFE sheath thiab cov tub ntxhais hlau. Ob qho tib si txhais tau hais tias sab hauv delamination, piv txwv li PTFE tau xoob los ntawm cov hlau tsis kam lossis los ntawm txheej txheej sab hauv. Qhov o feem ntau yog tsim los ntawm cov pa roj los ntawm qhov chaw degradation ntawm PTFE lossis los ntawm cov dej noo uas tau nkag mus rau hauv cov khoom thiab vaporised thaum cua sov. Yog hais tias qhov khoov yog bloated los yog blistered, ces lub PTFE immersion rhaub yog yuav ua tsis tau. Kev puas tsuaj loj (kev puas tsuaj los yog hluav taws xob arc) yuav tshwm sim.

4. Hloov hauv Nto Roughness lossis Texture
Qhov feem ntau du, tsis muaj kev sib txhuam ntawm PTFE tej zaum yuav ntxhib, pitted los yog sandpaper -zoo li ntawm qhov khoov. Qhov kev hloov pauv hauv kev ntxhib los mos no tuaj yeem yog vim muaj tshuaj tua kab mob (yog tias chav da dej tau nkag mus rau micro- tawg) lossis thermal degradation. Roughness txo cov thickness ntawm rwb thaiv tsev thaiv thiab muab cov chaw nucleation rau cov kab nrib pleb loj. Nyob rau hauv tsis tshua muaj tshwm sim ib tug dawb powdery residue yuav pom, qhov no yog decomposed PTFE khib nyiab.

Zoo heev tawg tsuas pom nrog magnification
Tsis yog txhua qhov fissures pom los ntawm tib neeg lub qhov muag. Cov theem ntxov tshaj plaws ntawm kev ua tsis tiav yuav tsis pom nyob rau hauv kev tshuaj ntsuam xyuas raws li qhov tsis pom qhov muag. Ib qho yooj yim 10 × jeweler's loupe lossis 20 × handheld microscope qhia:

Sab hauv khoov nto radial micro pob txha loj hlob sab nraud.

Longitudinal tawg mus rau qhov ntev ntawm qhov khoov, feem ntau pib ntawm lub apex ntawm sab nraud.

Pinhole fissures uas zoo li me me dub me ntsis, txhua txoj hauv kev ua kom cov kua dej nkag mus txog cov tub ntxhais hlau.

Cov neeg tsim khoom thiab cov pab pawg saib xyuas yuav tsum suav nrog qis- lub zog loj hauv kev tshuaj xyuas niaj hnub ntawm PTFE cov cua sov tseem ceeb.

Hluav taws xob cov paib: Thaum tsis muaj Visual Cues
Qee lub sij hawm PTFE sheath yuav zoo zoo tab sis qhov khoov twb tsis muaj zog nyob rau sab hauv. Hi- lub lauj kaub xeem yuav kuaj xyuas hluav taws xob los ntawm lub plhaub tsis muaj zog ua ntej nws yuav dhau los ua luv luv. Hauv kev sim siab - lub lauj kaub, qhov hluav taws xob siab (feem ntau yog 1500-2000 volts AC rau 240 volt rhaub) yog muab los ntawm cov hlau tsis kam thiab cov ntaub ntawv hauv av. Ib qho kev xau tam sim no dhau ntawm qhov ntsuas tau teev tseg (feem ntau <0.5 mA) yog qhov qhia txog kev tsis zoo ntawm dielectric. Kev ntsuas ib ntus ntawm cov dej xau tam sim no yog ib qho kev kwv yees zoo ntawm kev ua tsis tiav ntawm qhov khoov, nrog rau qhov kev xau tam sim no nce ntxiv.

Yuav Ua Li Cas Thaum Koj Pom Daim Ntawv Ceeb Toom
Yog tias pom ib qho ntawm cov tsos mob saum toj no lossis hluav taws xob pom, kev hloov pauv yuav tsum tau npaj sai li sai tau raws li kev tsim khoom yuav tso cai. Kev khiav lub tshuab cua sov uas muaj qhov crazing, discoloration, o los yog ib qho kev pom tseeb yog thov kom muaj kev puas tsuaj sai sai. Kev poob qis hauv kev khoov tuaj yeem:

Qhib cov kab hluav taws xob thiab txiav tawm cov txheej txheem cua sov.

Cia cov txheej txheem dej nkag mus rau hauv lub plhaub thiab ua rau cov txheej txheem tiv thaiv ntawm qhov ua txhaum hauv av.

Contaminates ilv tshuaj los yog plating kev daws teeb meem los ntawm leaching hlau ions (los ntawm cov hlau tsis kam) mus rau hauv da dej.

Hauv kev xyaum, tos kom txog thaum lub rhaub dej tawg tag nrho yuav luag tsis sib xws ua rau lub sij hawm poob ntev dua thiab tag nrho cov nqi ntau dua li hloov nws ntawm thawj qhov teeb meem.

Tsim kom muaj Kev Pabcuam Raws Li Kev Kho Mob
Nrhiav cov lus ceeb toom ntxov ntawm qhov nkhaus tso cai rau kev hloov pauv thiab tshem tawm lub sijhawm tsis tau pom dua. Ib qho xwm txheej raws li kev saib xyuas rau PTFE immersion heaters yuav tsum muaj xws li:

Kev kuaj pom pom (kev nthuav dav) ntawm thaj chaw khoov txhua lub hlis.

Peb lub hlis twg nyob zoo-kav ntsuas ntsuas qhov dej ntws tam sim no.

Nco ntsoov txhua yam xim hloov lossis hloov qhov chaw thiab muab cov duab sib piv.

Ib qho kev hloov pauv txhais tau hais tias: txhua qhov pom tseeb crazing, discoloration, o lossis 20% nce hauv cov dej ntws tawm los ntawm cov hauv paus.

Qhov kev pab cuam no ua rau kev tswj cov cua sov ua kom muaj kev saib xyuas zoo dua li qhov kev tawm tsam hluav taws kub ntawm tus nqi tsim nyog.

Cov kab hauv qab: Qhov muag ntawm Khoov Them Nyiaj Dividends
Qhov khoov ntawm PTFE immersion rhaub yog qhov chaw kho tshuab kev ntxhov siab raws li thermal cycling thiab hluav taws xob xav tau. Thawj qhov qhia txog kev ua tsis tiav hauv PTFE immersion heater Cheebtsam yog nto crazing, discoloration, o thiab roughness; lawv tau yooj yim pom tau los ntawm niaj hnub kev tshuaj xyuas qhov muag thiab nruab nrab magnification. Ntxiv rau lub sijhawm hi- lub lauj kaub ntsuas rau peb cov kev kuaj pom pom muab sijhawm rau peb ua ntej peb muaj kev puas tsuaj loj. Cov neeg ua haujlwm saib xyuas tuaj yeem ua raws li cov lus qhia txaus ntshai no los npaj kev hloov pauv ntawm lawv qhov yooj yim, tiv thaiv kev huv ntawm da dej thiab ua kom cov kab ntau lawm khiav. "Thaum kawg, nws tsis yog qhov tsim teeb meem nkaus xwb uas ua rau lub neej ntawm lub rhaub dej. Nws yog qhov ze npaum li cas nws qhov chaw muaj kev pheej hmoo feem ntau raug saib xyuas.