Dab tsi yog qhov feem ntau ntawm Thermocouple Faults hauv Kub Khiav Txhua Hnub Ntau Lawm?

Thermocouple tsis ua hauj lwm yog thawj qhov chaw ntawm qhov ua rau kub khiav pwm downtime, uas suav nrog tsib hom kev txhaum: qhib Circuit Court, luv Circuit Court, kub drift, tsis ruaj khov nyeem ntawv thiab tiv tauj tsis ua hauj lwm. Lawv tag nrho yog tshwm sim los ntawm kev puas tsuaj, thaiv kev ua yuam kev, cov khoom laus los yog kev teeb tsa tsis raug, ua rau muaj kev puas tsuaj loj xws li yas degradation, batch khoom thiab pwm nres.

1. Qhib Circuit Court txhaum (controller qhia qhov siab tshaj plaws kub los yog TC ceeb toom code). Qhov yooj yim tshaj plaws tsis ua hauj lwm yog txuam nrog cov tawg sab hauv hlau hlau ntawm lub thermocouple. Cov laj thawj hauv paus yog ntau dhau ntawm kev khoov lub vojvoog thaum lub sij hawm pwm los ua ke (rov ua dua bending fatigues xov hlau), hlau pinching thaum pwm clamping, thermal voj voog expansion thiab contraction qaug zog ntawm qhov kub hlws ris los yog oxidation tawg tom qab lub sij hawm ntev kub raug. Qhib circuits feem ntau yuav pom nyob rau hauv cov pwm hluav taws xob nrog nyias sheath micro-probes. Cov kauj ruam daws teeb meem: xyuas qhov kev tiv thaiv nrog multimeter. Yog hais tias koj tau txais infinite kuj, koj muaj ib tug tawg hlau. Koj yuav tau hloov tag nrho cov kev sojntsuam. Kev Tiv Thaiv: Siv cov ntxhia- insulated MI thermocouples nrog magnesium oxide sau kom tsis txhob muaj kev ntxhov siab thaum lub sijhawm teeb tsa, thiab ua qauv khoov lub vojvoog saum toj 5 hli.

2. Short Circuit Court txhaum (kub pom yog 0 lossis random qis tus nqi los ntawm tus maub los). tshwm sim thaum zoo thiab tsis zoo alloy hlau nyob rau hauv kov nrog ib tug lwm yam nyob rau hauv lub sheath. Feem ntau tshwm sim los ntawm sheath khawb kev puas tsuaj uas ua rau kub kub yaj to hu rau hauv xov hlau los yog puas insulating txheej ntawm cable connectors. Cov kab nrib pleb xoob xoob xoob xoob ntawm cov hlau tsis huv kuj ua rau luv luv. Qhov tshwm sim yog cov cua sov overheating runaway, hnyav yas hlawv thiab nozzle carbonization. Kev daws: Txheeb xyuas lub plhaub saum npoo rau perforations, rov qhwv lub rwb thaiv tsev puas, ntxuav qhov txuas txuas oxide hmoov, hloov qhov luv luv probes tam sim ntawd.

3. Silent kub drift (qhov teeb meem uas txaus ntshai tshaj plaws zais). Thermocouple poob qhov tseeb calibration maj mam yam tsis muaj lub tswb ceeb toom. Qhov ntsuas kub tiag tiag hloov los ntawm kev nyeem ntawv los ntawm 3-15℃hauv lub lis piam ntawm kev tsim khoom. Ua rau yog oxidation ntawm cov hlau hlau ntawm qhov kub sib txuas, xoob txuas ntawm qhov kev sojntsuam ua rau kub poob los ntawm qhov sib txawv ntawm huab cua, hluav taws xob hauv av voj kev cuam tshuam, los yog kis kab mob ntawm cov lus pom nrog decomposed yas carbon deposits. Moulders feem ntau tsis xyuam xim rau drift kom txog thaum QC tsis lees txais cov khoom ntawm deformed, discolored los yog puas qhov chaw. Qhov no tsuas yog zam los ntawm calibrating cov thermocouples tsis tu ncua ntawm peb lub hlis twg siv cov txheej txheem ntsuas kub.

4. Kub hloov pauv thoob plaws hauv kev dhia. Cov txiaj ntsig ntawm cov zaub tau dhia thoob plaws qhov chaw, tsis muaj qhov ntsuas qhov ntsuas ruaj khov, vim EMI lossis kev sib cuag tsis zoo. Cov teeb liab nrov yog tshwm sim los ntawm cov kab hluav taws xob thermocouple txuas nrog lub tshuab hluav taws xob fais fab cables. Loose caij nplooj ntoos hlav probes poob kev sib cuag nrog mounting qhov thaum thermal expansion. Corroded plug terminals tsim cov teeb liab sib kis. Txhim kho: cais cov teeb liab thiab cov kab hluav taws xob sib txuas, siv cov kab hluav taws xob tiv thaiv thermocouple tsuas yog hauv av ntawm tus maub los kawg, thiab hloov lub caij nplooj ntoos hlav probes uas tau poob qaug zog thiab polished connector terminals.

5. Kev ua txhaum ntawm kev rov qab polarity. Lub thermocouple zoo thiab qhov tsis zoo ntawm cov xaim hluav taws xob tau txuas rov qab rau ntawm lub tshuab hluav taws xob uas ua rau lub tshuab hluav taws xob overheat thiab lub tswb ntsuas kub tsis tu ncua. Qhov no yog ib qho yuam kev nrog cov neeg ua haujlwm pwm tshiab, K thiab J hom thermocouples muaj xim sau cov xov hlau zoo / tsis zoo kom paub qhov txawv polarity. Kev daws teeb meem: sib pauv ob lub hauv paus ntawm cov tswj lub davhlau ya nyob twg thaiv, tshuaj xyuas cov ntawv thaiv kab rau txhua qhov cua sov kom tsis txhob rov ua yuam kev.

Lwm yam tsis xws luag muaj xws li sheath corrosion los ntawm corrosive engineering yas volatiles, cable txheej braid aging splitting nyob rau hauv rhiav roj thiab plua plav, thiab lub caij nplooj ntoos hlav tsis ua hauj lwm tsim kev sib cuag tsis txaus siab. Los ntawm kev ua haujlwm niaj hnub tshuaj xyuas thiab hloov cov thermocouples txhua 2-6 lub hlis (nyob ntawm qhov kev siv ntawm ntau lawm), kub khiav downtime yuav txo tau ntau tshaj 70%.