Thermocouple Sheath Material Compatibility rau Pwm Bores Nrog Semi -Circular Combined Cartridge rhaub

Cov cuab yeej siv tshuab feem ntau xaiv cov khoom siv thermocouple sheath raws li qhov ntsuas kub siab tshaj plaws yam tsis xav txog cov tshuaj lom neeg hauv zos thiab oxidation nyob rau hauv pwm bores haum nrog semi- lub voj voog cartridge rhaub. Cov kev sib xyaw ua ke no ib nrab- cov cua kub sib dhos ua kom muaj qhov sib txawv ntawm qhov ntsuas kub thiab txo qhov kub ntawm qhov chaw, tab sis cov pwm tso tawm cov neeg ua haujlwm, cov yas tawm thiab rov ua dua thermal cycling tseem degrade cov ntaub ntawv thermocouple sheath thaum lub sij hawm. Sheath thinning, intergranular corrosion thiab deg scaling maj mam hloov thermal coupling thiab nws thiaj li tsim sheath nkag mus rau hauv, paug cov ntxhia hauv rwb thaiv tsev thiab ua rau sensor tsis ua hauj lwm.

Thermocouple sheath cov ntaub ntawv ua haujlwm rau ob lub luag haujlwm tseem ceeb: lub cev muaj lub cev ntawm cov xov hlau hauv thermocouple thiab cov ntxhia rwb thaiv tsev, ntxiv rau thermal conduction los ntawm cov pwm hlau mus rau qhov sib txuas. Cov qib alloy sib txawv tiv thaiv oxidation, carbon deposition thiab tshuaj tua kab mob ntawm pwm ua hauj lwm kub nyob rau hauv txawv txoj kev. Raws li kev paub dhau los, stainless hlau 304 sheaths ua haujlwm txaus rau qis - kub yas molding hauv qab 280 degree, thaum siab dua -kub kub compression pwm xav tau cov qib alloy hloov kho kom muaj sia nyob tsis tu ncua caij tsheb kauj vab nyob ze ib nrab ntawm - lub tshuab cua sov bores.

Cov lus teev cov sheath alloy kev ua tau zoo hauv pwm bores nrog ua ke ib nrab- lub voj voog cartridge rhaub:

Semi- cov khoom siv hluav taws xob hauv lub voj voog txo qis qhov kub ntawm qhov kub ntawm lub cua sov nws tus kheej, tab sis nyob ib puag ncig pwm steel siv sijhawm ntev dua nyob rau ntawm qhov kub siab. Lub sijhawm nyob ntev ntev ua rau qeeb oxidation ntawm cov thermocouple sheaths zaum hauv tib qhov chaw bore. Conventional solid round cartridge heaters often cycle through sharper hot spikes, which sometimes crack oxide layers, while the gentler steady heat from split semi-circular heaters creates dense, adherent oxide scales that gradually increase sheath thermal resistance. Tshaj li ntau pua lub voj voog, txheej txheej txheej no ntxiv cov thermal lag ntawm pwm hlau thiab thermocouple hlws ris.

Cov pa roj carbon deposition los ntawm yas outgassing tsim lwm txoj kev tsis ua hauj lwm. Volatile organic vapors tso tawm thaum lub sij hawm molding decompose ntawm kub hlau qhov chaw thiab tsim carbon films. Cov khoom siv hluav taws xob no nkag mus rau ntawm qhov chaw thermocouple sheath thiab nws thiaj li nkag mus rau qhov tsis sib xws ntawm cov khoom siv cable nkag, ua rau muaj kev cuam tshuam luv luv ntawm cov thermocouple conductors. Inconel alloys tiv taus cov pa roj carbon fouling zoo dua li cov qauv stainless hlau qib, uas tseem ceeb rau siab - kub molding ntawm cov nylon, PEEK thiab thermoset resins.

Thermal fatigue cracking yuav cuam tshuam rau cov pwm uas voj voog ceev ceev ntawm ambient thiab kev khiav hauj lwm kub. Kev sib koom ua ke ib nrab- lub tshuab hluav taws xob tsim hluav taws xob nthuav dav zoo sib xws rau cov phab ntsa bore, txo qhov tsis sib xws ntawm thermal stress ntawm pwm hlau, tab sis cov thermocouple sheaths muaj kev rov mus ncig ntawm lawv tus kheej. Alloy grain qauv txiav txim cov ntsiab lus pib tawg. Tsawg- cov qib carbon xws li 316L txo qis kev sib tsoo, thaum lub zog ntau dua cov nickel alloys tswj kev ncaj ncees ntawm qhov kub siab rau ntau txhiab cua sov- lub voj voog txias.

Phab ntsa thickness xaiv rau thermocouple sheaths sib npaug kev pabcuam lub neej thiab lub sijhawm teb. Nyias-phab ntsa sheaths hloov tshav kub sai dua tab sis corrode los ntawm sai sai nyob rau hauv tshuaj lom neeg molding ib puag ncig. Thick-phab ntsa sojntsuam tiv thaiv corrosion thiab mechanical puas tsuaj tab sis nqa cov thermal loj dua, qeeb qhov kub teb. Ntau lub tshuab pwm siv ib nrab- lub tshuab hluav taws xob lub voj voog xaiv 0.8mm phab ntsa tuab raws li qhov ua tau zoo hauv nruab nrab, khaws cia cov lus teb tau nrawm thaum txuas ntxiv cov kev pabcuam.

Kev tshuaj xyuas niaj hnub rau sheath degradation cia siab rau kev kuaj pom thiab kev ntsuas kev tiv thaiv hluav taws xob. Nto scaling, discoloration thiab micro- tawg teeb liab ua ntej sheath aging. Megohmmeter nyeem ntawv taug qab cov kev tiv thaiv kev tiv thaiv ua ntej hluav taws xob tsis zoo tshwm sim. Thermocouples raug rau hnyav outgassing yuav tsum tau soj ntsuam nyob rau lub sij hawm luv luv, raws li cov pa roj carbon monoxide paug tuaj yeem ua rau luv luv - cov xwm txheej hauv Circuit Court yam tsis muaj kev ceeb toom sab nraud.

Thermocouple sheath xaiv cov khoom siv yuav tsum suav rau qhov kub thiab txias thiab molding media chemistry, tsis yog qhov ntsuas kub siab xwb. Semi-Cov khoom siv hluav taws xob sib xyaw ua ke hloov pauv cov cwj pwm thermal hauv pwm bores thiab hloov mus ntev- lub sij hawm sheath aging qauv rau qhov ntsuas kub nyob ib sab. Kev cai thermocouple cov rooj sib txoos tuaj yeem ua tau nrog cov hlau nplaum sib phim rau hom resin thiab kev ua haujlwm kub ntau. Cov kws tshaj lij pwm cov khoom siv thermal tshuaj xyuas txheeb xyuas cov khoom siv tawm, lub voj voog zaus thiab qhov kub siab tshaj plaws kom paub meej cov thermocouple sheath alloys haum rau cov cuab yeej haum nrog cov sib cais ib nrab- lub voj voog cartridge cua sov.