Niaj hnub nimno txhaj tshuaj molding cia siab rau cov yas hloov kho nrog cov khoom ntxiv xws li iav fiber ntau, minerals, nplaim hluav taws kub, carbon dub, thiab cuam tshuam kev hloov pauv. Thaum cov khoom siv ntxiv no txhim kho cov khoom siv, lawv tsim cov xwm txheej hnyav heev rau cov khoom kub khiav, tshwj xeeb tshaj yog cov thermocouples. Yuav ua li cas cov khoom siv ntxiv cuam tshuam rau lub neej thermocouple, thiab dab tsi tuaj yeem ua kom txo tau kev puas tsuaj?
Cov iav fiber ntau yog ib qho ntawm cov khoom siv nruj tshaj plaws. Thaum qhov kub thiab txias, cov iav me me ua raws li cov abrasive, hnav cov thermocouple sheath nto. Qhov kev puas tsuaj no nthuav tawm cov conductors sab hauv, ua rau luv luv Circuit Court, teeb liab drift, thiab thaum ntxov tsis ua hauj lwm. Ntau lub hlis ntawm kev ua haujlwm, iav - cov ntaub ntawv ntim tau tuaj yeem txiav los ntawm cov qauv sensor sheaths tag nrho.
Nplaim taws-cov khoom siv retardant muaj cov tshuaj sib txuas uas ua rau cov khoom siv thermocouple corrode hlau. Chlorine, bromine, thiab phosphorus -raws li additives teb nrog sensor alloys ntawm qhov kub thiab txias, ua rau oxidation thiab kev puas tsuaj. Cov tshuaj tua kab mob no ua kom nrawm nrawm thiab txo cov kev pab cuam lub neej.
Mineral-cov yas ntim puv, suav nrog talc, calcium carbonate, thiab mica, ua kom yaj viscosity thiab abrasiveness. Cov khoom tawv tawv khawb thiab erode thermocouple probes, ua rau qhov kev sib tshuam ntawm qhov nkag thiab rwb thaiv tsev. Qhov tshwm sim yog kev nyeem tsis ruaj khov thiab ua tsis tiav ntxov.
Cov pa roj carbon dub thiab cov khoom siv hluav taws xob ua kom muaj hluav taws xob cuam tshuam. Cov additives no tuaj yeem tsim cov kab hluav taws xob yog tias lawv nkag mus rau qhov hluav taws xob puas tsuaj, ua rau cov teeb liab tsis ruaj khov thiab nyeem tsis raug. Thermocouples yuav tsum muaj cov rwb thaiv tsev tiav kom tsis txhob cuam tshuam.
Siab -kub additives siv nyob rau hauv engineering plastics nce kev khiav hauj lwm kub, tso siab dua thermal stress ntawm thermocouples. Cov ntaub ntawv xws li PPS, PEEK, thiab LCP yuav tsum tau kub siab tshaj 300 degree, ua kom oxidation ntawm tus qauv thermocouple alloys. Qhov no ua rau kom nrawm dua thiab ua haujlwm luv dua.
Kev hloov pauv hloov tau yooj yim thiab elastomeric additives tuaj yeem tso cov nplaum nplaum ntawm cov khoom siv thermocouple. Cov residues carbonize ntawm qhov kub thiab txias, tsim ib txheej insulating uas txo cov lus teb ceev thiab ua rau qis - nyeem ntawv kub.
Qee cov acidic additives txhawb corrosion hauv manifold thiab nozzle bores. Qhov kev xeb no kis mus rau qhov chaw thermocouple, hloov lawv cov khoom hluav taws xob thiab ua rau tsis muaj kev cuam tshuam. Kev tu tsis tu ncua yuav ua haujlwm tsawg dua li kev txhim kho corrosion.
Txhawm rau tiv thaiv cov teebmeem no, cov thermocouples kub khiav yuav tsum tau siv tshwj xeeb sheath alloys resistant to abrasion and chemical attack. Cov ntaub ntawv xws li Inconel thiab qib siab - qib stainless hlau muab kev tiv thaiv zoo dua li cov qauv alloys.
Kev sojntsuam sealing yog ib qho tseem ceeb thaum khiav cov khoom siv ntxiv - cov ntaub ntawv puv. Tag nrho cov kaw junctions tiv thaiv cov tshuaj vapors thiab molten additives los ntawm kev nkag mus rau lub sensor sab hauv. Txawm tias qhov khoob me me tuaj yeem ua rau degradation sai.
Kev saib xyuas tsis tu ncua thiab tshuaj xyuas ua qhov tseem ceeb dua nrog cov khoom siv abrasive lossis corrosive. Kev tshuaj xyuas cov thermocouples rau hnav thaum lub sij hawm hloov pwm tso cai rau kev hloov thaum ntxov ua ntej muaj kev puas tsuaj loj tshwm sim.
Hauv cov ntsiab lus, cov khoom siv additives nyuaj heev rau cov thermocouple durability. Kev nkag siab txog cov teebmeem no tso cai rau cov pwm tuaj yeem xaiv cov sensors muaj zog dua, siv kev saib xyuas zoo dua, thiab txuas ntxiv lub neej kev pabcuam hauv kev xav tau.
