Thaum koj hais tias 'heat exchanger part', neeg feem coob pom lub raj lossis lub fin. Qhov ntawd yog thawj qhov kev xav tsis zoo. Nyob rau hauv qhov tseeb, nws yog ib feem uas txhais los ntawm nws cov hauj lwm nyob rau hauv ib tug thermal system, thiab qhov kev ua hauj lwm yog tag nrho nyob ntawm seb geometry, cov ntaub ntawv ncaj ncees, thiab nto kev sib tshuam. Kuv tau pom ntau cov duab kos uas qhov kev tsom xam tsuas yog nyob rau qhov kawg qhov ntev, tsis quav ntsej txoj kev taug kev ntawm cov hlau mus rau qhov ntawd - txoj kev casting, machining nyiaj pub dawb, cov qauv nplej. Qhov ntawd yog qhov uas tsis ua haujlwm feem ntau pib, tsis yog hauv kev ua haujlwm, tab sis hauv kev qhia tshwj xeeb.
Lub Foundation: Nws pib nrog Cast
Koj tsis tuaj yeem tshuab ib feem txhim khu kev qha los ntawm kev ua haujlwm tsis zoo. Qhov no zoo li pom tseeb, tab sis nws niaj hnub underestimated. Rau kub exchanger qhov chaw zoo li cov headers complex, manifolds, los yog cov dej tsho, cov lus sab hauv yog txhua yam. Kev hloov me ntsis hauv lub hauv paus thaum lub sijhawm plhaub molding tuaj yeem tsim ib qho chaw nyias uas dhau los ua qhov tsis ua haujlwm nyob rau hauv thermal cycling. Peb kawm qhov no thaum ntxov nrog tus neeg siv khoom lub compressor intercooler kawg cap. Cov ntawv luam tau hu rau cov phab ntsa tshwj xeeb, tab sis thawj zaug xuab zeb casting txheej txheem tsis tuaj yeem tuav lub hauv paus rau lub baffle sab hauv. Qhov tshwm sim? Ib tug 30% seem tus nqi ntawm thawj batch tom qab machining, vim hais tias lub CNC sojntsuam cia nrhiav voids. Qhov seem ntsia zoo tag nrho rau sab nraud, tab sis tau teeb tsa sab hauv.
Tias yog vim li cas rau lub siab-muaj lossis siab-thermal-stress Cheebtsam, peb feem ntau thawb cov neeg siv khoom mus rau peev casting rau thawj daim ntawv. Qhov tseeb qhov tseeb thiab qhov chaw tiav los ntawm qhov pib yog superior, tshwj xeeb tshaj yog rau cov intricate intricate channels. Yog lawm, nws kim dua ib thooj hauv pwm theem, tab sis koj txuag tau nyiaj ntau hauv machining lub sij hawm thiab cov khoom pov tseg. Koj tab tom muab txoj haujlwm CNC sib ntaus sib tua. Kuv nco qab txog qhov project rau lub phaj kub exchanger thav duab nyob rau hauv 316L stainless qhov twg hloov los ntawm ib tug fabricated weldment mus rau ib tug monolithic peev casting txiav tag nrho ib feem ntawm tus nqi los ntawm 15% thaum koj factored nyob rau hauv lub tshem tawm ntawm kev kho cua sov tom qab vuam thiab txo machining dhau.
Cov khoom xaiv ntawm no yog inseparable ntawm tus txheej txheem. Qhia meej a Nickel-raws li alloy zoo li Inconel 625 rau qhov kub-kub gas duct? Koj nyob nraum yuav luag saib ntawm peev casting. Lub fluidity ntawm cov hlau nyob rau hauv cov txheej txheem ntawd, ua ke nrog lub alloy lub cev kub lub zog, muab rau koj ib tug ntau txhim khu kev qha pib dawb paug tshaj sim tshuab txhua yam los ntawm ib tug khoom thaiv. Cov neeg ntawm Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) muaj lub ntsiab lus thaum lawv hais txog lawv txoj haujlwm nrog cov no tshwj xeeb alloys. Nws tsis yog tsuas yog muaj cov khoom hauv Tshuag; nws yog hais txog kev paub yuav ua li cas nws coj thaum lub sij hawm solidification nyob rau hauv lawv lub plhaub pwm, ntau npaum li cas shrinkage yuav tsum tau, qhov twg yuav tso cov risers. Tias 30 xyoo lawv hais nyob rau hauv casting tsis yog kev lag luam kab; nws yog qhov chaw khaws cia ntawm kev paub uas tiv thaiv $ 50,000 alloy yaj los ntawm kev xa mus rau hauv seem.
Qhov tseeb Machining: Kev kam rau siab yog kev sib tham
Nov yog lwm qhov tseeb qhov tseeb: qhov kam rau ntawm daim duab yog feem ntau xav tau daim ntawv teev npe, tsis yog daim ntawv qhia ntau lawm. Tus tsim qauv tuaj yeem hu rau ± 0.02mm kam rau ntawm lub voj voog bolt rau ib daim ntawv raj. Tab sis yog tias qhov ntawd yuav dhau los ua 150 ° C kub viav vias hauv kev pabcuam, lawv puas tau suav nrog cov coefficient ntawm thermal expansion rau qhov tshwj xeeb. nrum hlau qib? Qee lub sij hawm, tuav lub siab ua kom nruj ntawm chav tsev kub tuaj yeem lav qhov teeb meem haum ntawm kev ua haujlwm temp. Txoj haujlwm dhau los ua kev sib tham - piav qhia qhov no, qhia txog kev ua haujlwm ntev dua, lossis qee zaum, tawm tswv yim sib txawv rau txhua tus.
CNC machining yog qhov chaw ua haujlwm ntawm qhov chaw yug. Lub ntsej muag sealing rau lub gasket, xov rau lub thermowell, zawj rau lub nplhaib sealing. Kev sib tham ntawm lub ntsej muag ua haujlwm, ib qho hnav me ntsis tawm ntawm lub ntsej muag microscopic - cov no tsis yog teeb meem tshuaj pleev ib ce xwb. Lawv muaj peev xwm xau txoj hauv kev los yog kev ntxhov siab concentrators. Kuv nco qab ib pawg ntawm cov khoom siv hluav taws xob kawg ntawm lub kaus mom uas O-ring zawj muaj qhov zoo nkauj tiav, tab sis lub vojvoog hauv qab tsuas yog cov plaub hau ntse heev raws li cov cuab yeej siv. Nws dhau QC ntawm CMM. Nws ua tsis tiav hauv kev ntsuas siab txhua lub sijhawm, tawg tawm ntawm lub vojvoog ntawd. Qhov kho tsis yog qhov kev hloov pauv; nws tau hloov mus rau qhov cuab yeej tshwj xeeb groove-txiav nrog lub vojvoog uas muaj ntawv pov thawj, tsis tso siab rau lub pob-qhov ntswg kawg zeb txoj kev.
Qhov no yog qhov uas cov khw sib xyaw ua ke muaj qhov zoo dua. Coj ib lub tuam txhab zoo li QSY. Yog tias lawv tab tom tuav ob lub plhaub molding thiab cov CNC machining nyob rau hauv tsev, lub tswv yim voj yog luv luv. Tus kws kho tshuab pom ib qho chaw nyuaj lossis qhov porosity hauv qhov casting. Es tsis txhob tsuas yog scrapping ib feem, cov ntaub ntawv no ncaj qha rov qab mus rau lub foundry pab neeg ntawm lub qhov rooj. Lawv tuaj yeem kho qhov kub thiab txias los yog pwm txheej rau cov khoom tom ntej. Qhov kev sib koom ua ke ntawm cov txheej txheem no yog qhov tseem ceeb rau cov khoom siv, cov nqi siab. Koj tsis yog yuav ib qho kev pabcuam machining lossis casting; koj tab tom yuav ib qho kev kho thiab kho kom zoo.
Khoom siv tsis yog ib daim ntawv tshwj xeeb xwb
ASTM A351 CF8M qhia koj tias nws yog cam khwb cia hlau zoo ib yam li 316. Nws tsis qhia koj txog cov ntsiab lus ferrite, uas cuam tshuam rau ob qho tib si corrosion thiab machinability. Rau ib kub exchanger part da dej hauv chlorides, tus lej ferrite yog qhov tseem ceeb. Peb ib zaug muaj teeb meem cavitation yaig nyob rau sab dej ntawm lub cam khwb cia stainless twj volute uas yog ib feem ntawm lub voj voog txias. Cov ntaub ntawv pov thawj tau zoo meej. Metallurgical tsom xam pom tias cov ferrite yog nyob rau ntawm qhov tsawg kawg nkaus ntawm qhov tau txais ntau yam, ua rau nws tsuas yog me ntsis softer thiab ntau raug rau cov npuas impinging. Lub foundry tsis tau ua ib yam dab tsi tsis ncaj ncees lawm rau lub spec, tab sis ib feem ua tsis tau tejyam nyob rau hauv nws cov luag num. Qhov kev daws teeb meem yog kom nruj peb cov khoom siv sab hauv spec thiab ua haujlwm nrog cov chaw tsim khoom los tswj cov chemistry ntau dua rau daim ntawv thov ntawd.
Qhov no tau txais txawm ntau nuanced nrog cobalt-based alloys zoo li Stellite rau hnav-ntsej muag ntawm lub rooj zaum hauv lub tshuab hluav taws xob. Nws yog feem ntau siv raws li weld overlay. Kev txawj ntse tsis yog nyob rau hauv vuam; nws yog nyob rau hauv lub tom ntej machining ntawm uas incredibly nyuaj, puas-resistant nto yam tsis inducing micro-cracks los yog delamination. Koj xav tau cov qib zoo ntawm carbide, txoj cai nrawm thiab pub, thiab ua siab ntev ntau. Nws yog ib qho txuj ci ntau npaum li kev tshawb fawb. Cov lus piav qhia los ntawm QSY's site hais txog lawv txoj haujlwm nrog cov alloys qhia txog qhov muaj peev xwm no. Nws txhais tau hais tias lawv tau taug kev cov nyom ntawm machining cov ntaub ntawv nyuaj tom qab casting los yog vuam, uas yog ib qho tseem ceeb ntawm tus nqi-ntxiv tshaj qhov tsuas yog nrhiav cov hlau.
Thiab cia peb tham txog cov qub qub carbon steel. Rau ntau daim ntawv thov uas tsis yog-corrosive, nws yog lub workhorse. Tab sis ib feem ntawm lub tshav kub exchanger tsis yog ib tug structural beam. Cov thermal conductivity tseem ceeb. Qee lub sij hawm, cov ntsiab lus ntawm cov pa roj carbon ntau dua tuaj yeem ua tau zoo rau lub zog, tab sis nws kuj tuaj yeem ua rau feem ntau ua rau muaj kev ntxhov siab corrosion tawg hauv qee qhov chaw. Koj ib txwm ntsuas cov khoom. Qhov kev xaiv tsis yog hlau xwb; nws yog cov hlau, los ntawm cov yaj, kho nyob rau hauv txoj kev twg tom qab casting. Kev kho cua sov tom qab-kev ua kom zoo, ua kom sov, ua kom sov-yog qhov tseem ceeb raws li cov kauj ruam machining rau kev teeb tsa cov khoom kawg.
Dab ntxwg nyoog nyob rau hauv cov ntsiab lus: Gaskets, Xov, thiab tiav
Ib feem loj ntawm qhov tsis ua haujlwm tsis muaj dab tsi ua rau lub cev tseem ceeb. Nws yog nyob rau hauv cov yam ntxwv ntxiv. Cov xov rau lub qhov dej ntsaws striped tawm. Qhov saum npoo tiav ntawm lub flange tsis sib xws nrog cov kauv-qhov txhab gasket, ua rau kom muaj dej. Qhov drilling rau lub hnab ntim ntsuas kub tsis tau deburred sab hauv, tsim kom muaj kev txwv tsis pub khiav thiab qhov chaw kub. Cov no yog cov ntsiab lus uas cais ib feem ua haujlwm ntawm ib qho kev ntseeg siab.
Siv flange tig. Tus qauv 125 Ra microinch tiav yuav raug hu tawm. Tab sis yog hais tias lub gasket yog ib hom graphite mos, uas tej zaum yuav ntxhib heev. Yog hais tias nws yog ib tug hlau jacketed gasket, nws yuav ua tau. Tus kws kho tshuab yuav tsum paub qhov kawg siv los xaiv txoj cai ntxig thiab pub tus nqi kom ua tiav tsis yog tus lej xwb, tab sis qhov chaw ua haujlwm. Kuv tau pom flanges uas ntsuas tau zoo kawg nkaus tab sis leaked vim tias cov cuab yeej tawm ntawm cov qauv me me uas lub gasket tsis tuaj yeem kaw. Qhov kev kho yog qhov kawg, lub teeb dhau heev nrog rau ib qho wiper ntxig los tsim kom muaj tus qauv sib txawv ntau dua.
Thiab xov. Muaj teeb meem ntau. Rau cov tshuab ua kom muaj zog, cov xov ncaj nrog O-ring feem ntau muaj kev nyab xeeb dua li cov yeeb nkab sib txuas, uas tso siab rau hlau-rau-hlau wedging thiab xov sealant. Tab sis yog tias koj yuav tsum siv NPT, qhov tob thiab taper ntawm lub qhov taub yog qhov tseem ceeb. Hauv qab-kais nws, thiab koj muaj kev pheej hmoo tawg ntawm qhov chaw thaum lub qhov sib dhos yog nruj nreem kom ua tiav lub foob. Hla-kais nws, thiab koj muaj kev koom tes tsis txaus. Ib qho kev coj ua zoo yog muab cov khoom tseem ceeb no nrog cov khoom siv uas twb tau teeb tsa thiab torqued rau spec, lossis tsawg kawg, muab qhov ntsuas mus / tsis mus rau tus neeg siv khoom. Nws tshem tawm qhov hloov pauv loj hauv thaj chaw.
Saib Tag Nrho, Tsis Yog Ib Ntu
Thaum kawg, a kub exchanger part tsis muaj nyob hauv kev sib cais. Nws qhov kev ua tau zoo yog khi rau cov khoom uas nws sib koom nrog. Thaum peb ua ib qhov project, tshwj xeeb tshaj yog rau ib qho kev hloov los yog ib qho retrofit, peb sim kom peb txhais tes ntawm cov mating tivthaiv yog tias ua tau. Ntsuas qhov tseeb bore ntawm lub plhaub exchanger, lub flatness ntawm opposing flange. Vim tias qee zaum, koj yuav tsum tau tshuab koj lub luag haujlwm kom haum rau qhov tseeb ntawm qhov system, tsis yog qhov zoo tshaj plaws ntawm qhov qub, faded duab.
Qhov kev pom holistic no yog qhov txhais tau tias tus kws tshaj lij. Nws tsis yog hais txog kev khiav lub tshuab CNC. Nws yog hais txog kev nkag siab txog thermal expansion, dej dynamics, corrosion mechanisms, thiab assembling mechanics. Nws yog hais txog kev paub tias qhov zoo nkauj, qhov zoo nkauj zoo nkauj tuaj yeem raug puas tsuaj los ntawm ib qho kev ua haujlwm nruj heev uas ua rau muaj kev ntxhov siab, uas tom qab ntawd nthuav tawm nws tus kheej li kev cuam tshuam thaum thawj lub voj voog kub. Lub hom phiaj yog xa ib feem uas ploj mus rau hauv qhov system - nws tsuas yog ua haujlwm, voj voog tom qab lub voj voog, tsis muaj yeeb yam.
Qhov ntawd yog cov khoom tiag. Tsis yog ib daim hlau, tab sis kev ntseeg tau. Cov khw uas tau dhau los ntawm cov voj voog, xws li QSY nrog lawv cov xyoo caum hauv casting thiab machining, muaj internalized qhov no. Tej zaum lawv yuav pom qhov ua tsis tiav, ua qhov kho, thiab txhim kho lub tsev qiv ntawv tsis muaj peev xwm ntawm qhov tsis ua. Thaum koj tab tom nrhiav ib qho tseem ceeb, keeb kwm ntawd, qhov kev ceeb toom tseem ceeb thiab kev daws teeb meem, feem ntau muaj txiaj ntsig ntau dua li tus nqi qis tshaj ib thooj. Vim tias tus nqi ntawm qhov tsis ua haujlwm hauv thaj teb - lub sijhawm poob qis, kev tsim khoom ploj, teeb meem kev nyab xeeb - dwarfs thawj feem nqi txhua txhua lub sijhawm.
