Euro 6 Residual Gasket - Siab -Tub kub Fluorosilicone Foob rau EGR Circuit Court kev ncaj ncees

Euro 6 cov qauv emissions txwv nruj rau NOx thiab cov teeb meem me me, yuam cov tuam txhab lag luam cia siab ntau rau cov pa roj recirculation (EGR) cov tshuab uas xa ib feem ntawm cov pa tawm rov qab mus rau hauv cov khoom noj. Cov roj seem - kub, corrosive sib tov ntawm combustion by-products - yuav tsum tau precisely ntsuas thiab txias ua ntej nkag mus rau hauv lub tog raj kheej. Txhua qhov xau hauv EGR Circuit Court, tshwj xeeb tshaj yog nyob rau hauv kev sib koom ua ke ntawm EGR cooler thiab intake manifold los yog ntawm EGR valve flange, tso cai rau unfiltered tso pa tawm los yog dilutes cov pa kom tsawg nrog cov roj tsis tswj, cuam tshuam cov huab cua-roj piv thiab nce NOx tsim. Qhov Euro 6 Residual Gas Gasket no tau tsim tshwj xeeb rau cov pob qij txha muaj kev ntxhov siab, muab cov kev sib khi ruaj khov uas tswj xyuas qhov ntsuas EGR ntws ntawm txhua qhov kev ua haujlwm kub (–30℃rau +350℃). Lub gasket qhov tshwj xeeb fluorosilicone composite txheej haum rau thermal expansion mismatches ntawm txhuas thiab cam khwb cia hlau Cheebtsam, tiv thaiv lub bolt-loosing thiab flange distortion uas ua rau cov pa graphite los yog ntawv gaskets ua tsis tiav ntxov.

Tsis zoo li ib qho khoom siv gaskets, qhov seem gasket no muaj peb txheej tsim: ib qho perforated stainless hlau core (0.2 hli tuab) muab txhua yam muaj zog thiab tiv thaiv extrusion nyob rau hauv siab clamping loads; fluorosilicone roj hmab txheej ntawm ob sab (0.5 hli txhua) muaj qhov tshwj xeeb tiv thaiv kom kub-kub oxidation thiab tawm tsam los ntawm sulfuric thiab nitric acids uas muaj nyob rau hauv cov pa condensate; thiab sab nrauv PTFE daim tawv nqaij (0.1 hli) txo kev sib txhuam thaum sib dhos thiab tiv thaiv micro-welding rau cov flange nto. Cov fluorosilicone compound, tsim nrog cov khoom ntim khoom, tswj nws qhov elasticity ntawm 350℃kev ua haujlwm tas mus li, nrog cov txheej txheem compression tsawg dua 15% tom qab 1,000 teev ntawm 300℃- qhov tseem ceeb ntawm kev ua kom ntseeg tau tias lub gasket tsis poob nws lub zog sealing lub sijhawm. Cov tub ntxhais stainless hlau yog embossed nrog lub pob zeb diamond-pattern mesh uas muab kev tswj kev deformation, tso cai rau lub gasket nqus flange irregularities mus txog 0.3 hli yam tsis muaj kev cuam tshuam lub foob.

Lub gasket muaj nyob rau hauv ntau yam ntawm cov qauv thiab kev cai qhov ntev kom haum rau EGR system interfaces ntawm Euro 6 cav los ntawm cov tuam txhab loj. Feem ntau configurations muaj xws li:

Rectangular flange gaskets- rau EGR txias kom tau txais cov pob qij txha manifold (qhov loj me 80 × 60 hli nrog 4 lub qhov ntsia hlau, ntsia hlau lub voj voog txoj kab uas hla 70 hli)

Lub voj voog flange gaskets- rau EGR valve kev sib txuas (txoj kab uas hla 50 hli, nrog 3 lossis 4 lub qhov ntsia hlau)

Oval port gaskets- rau cov pa tso pa tawm mus rau qhov txias (xws li 45 × 30 mm oval qhib)

Txhua lub gasket yog precision tuag-txiav nrog ib tug kam rau ua ntawm ± 0.1 hli nyob rau sab nrauv qhov ntev thiab ± 0.05 hli ntawm cov ntsia liaj qhov rooj txoj hauj lwm, kom ntseeg tau ib tug zoo meej kev sib raug zoo nrog cov coolant thiab gas passages. Lub gasket thickness yog Hoobkas- teem rau 1.2 hli (nominal) nrog ib tug compressibility ntawm 20-25% ntawm qhov pom zoo ntsia liaj qhov rooj torque, muab ib tug zoo sealing siab ntawm 15-20 MPa ntawm lub flange nto - tus nqi uas correlates nrog cov OEM specifications rau feem ntau Euro 6 cav (Volvo D13, ScaniaMAN 7, DC24-Benz, Mercedes-Benz DCOM, DC13, Scania, DC13, thiab Benz. Cursor 13).

Qhov no gasket yog tsim tshwj xeeb rau EGR system Cheebtsam ntawm cov nram qab no Euro 6 thiab Euro 6d-raws li diesel xyaw, tag nrho cov uas yog cov kev tsheb ciav hlau los yog unit injector systems:

Volvo D13K thiab D13TC- EGR txias kom noj manifold, siv cov duab plaub flange

Scania DC 13- EGR valve flange, ncig 50 mm configuration

MAN D26 thiab D38- EGR lub qhov hluav taws xob txias, tsim qhov chaw nres nkoj oval

Mercedes-Benz OM471, OM472, OM473- ntau yam flange duab; lub gasket teeb muaj xws li universal trim-to-fit xaiv

Iveco Cursor 13- EGR bypass valve, duab plaub nrog 4 lub qhov ntsia hlau

DAF MX-13- EGR gas inlet, ncig flange nrog 4 bolts

Rau cov cav uas tsis yog tus qauv flange qhov ntev, peb muab kev pabcuam txiav kev cai - tsuas yog muab tus qauv lossis CAD kos duab.

Lub gasket tau dhau los ua qhov kev sim dav dav ntawm qhov ntsuas kub kub, qhov twg nws tau raug rau 5,000 lub voj voog thermal los ntawm 20℃mus rau 350℃(ramp tus nqi 10℃/ min) thaum tuav lub siab sab hauv ntawm 3 bar (tsawg) thiab cov roj ntws simulating EGR tus nqi txog li 40%. Cov dej xau tau ntsuas los ntawm kev siv lub helium huab hwm coj spectrometer, thiab cov txiaj ntsig tau pom tias qhov dej xau tsawg dua 0.5 ml / min tom qab 5,000 cycles - ib daim duab uas zoo dua li OEM txais qhov pib ntawm 2 ml / min. Lub flange siab tau ntsuas ua ntej thiab tom qab kuaj; lub gasket khaws 85% ntawm nws thawj zaug sealing quab yuam, paub meej tias nws tsis kam mus so. Tsis tas li ntawd, lub gasket raug xa mus rau cov khoom siv hluav taws xob (muaj 10 ppm sulfuric acid, 5 ppm nitric acid, thiab 100 ppm dej ntawm 60 degree) rau 1,000 teev, tsis pom qhov degradation ntawm fluorosilicone txheej, raws li kev txheeb xyuas los ntawm SEM / EDX.

Q1: Cov gasket no puas tuaj yeem rov siv tau tom qab disassembly?
Tsis yog - lub gasket lub fluorosilicone txheej yog tsim los compress mus tas li kom haum flange irregularities. Thaum muab tshem tawm, nws yuav tsis muab tib lub zog sealing. Ib txwm nruab ib lub gasket tshiab rau kev ruaj ntseg sealing.

Q2: Kuv yuav txheeb xyuas qhov tseeb gasket loj npaum li cas rau kuv lub cav?
Peb muab ib daim ntawv qhia me me ntawm peb lub vev xaib nrog cov duab kos. Yog tias koj tsis paub meej, koj tuaj yeem nqa ib qho kev taug qab ntawm lub flange (sab nrauv contour thiab bolt qhov txoj haujlwm) thiab xa email rau peb - ​​peb yuav phim nws rau tus qauv ze tshaj plaws lossis kev cai txiav ib qho rau koj.

Q3: Lub gasket no puas siv tau nrog EGR systems uas siv cov dej txias txias?
Yog lawm, cov roj hmab fluorosilicone tuaj yeem tiv taus cov dej txias (ethylene glycol) thiab rau cov pa cua kub kub. Txawm li cas los xij, xyuas kom lub gasket nyob rau hauv thiaj li hais tias nws muab ob qho tib si cov pa roj thiab cov cua txias - peb gaskets muaj cais cov hlaws dai rau txhua lub voj voog.

Q4: Dab tsi yog qhov siab tshaj plaws qhov gasket no tuaj yeem tiv taus?
Lub gasket yog ntsuas rau 5 bar (gauge) static siab, tab sis nyob rau hauv kev xyaum lub EGR system ua hauj lwm nyob rau hauv ze-cua sov atmospheric rau me ntsis nqus thaum deceleration. Lub sealing siab yog muab los ntawm lub bolt torque, tsis yog lub siab sab hauv. Lub gasket lub tshuab tawm tsis kam yog li 10 bar, tab sis peb tsis pom zoo kom tshaj 5 bar vim nws yuav qhia tau tias EGR valve ua haujlwm tsis zoo.

Q5: Lub gasket ua haujlwm li cas ntawm qhov kub qis thaum pib txias?
Cov roj hmab fluorosilicone khaws nws qhov yooj yim mus rau -30 degree. Thaum qhov kub thiab txias, nws yuav dhau los ua me ntsis, tab sis compression txheej txheem tsis cuam tshuam. PTFE daim tawv nqaij tiv thaiv lub gasket los ntawm kev lo rau lub flange, yog li thawj zaug sealing yog tsim tam sim ntawd thaum clamping.

Q6: Koj puas muab kev lees paub tiv thaiv kev tawg lossis tawg?
Peb muab 12 lub hlis lav tiv thaiv kev tsim khoom tsis xws luag (piv txwv li, delamination lossis qhov ntev tsis raug). Txawm li cas los xij, kev ua tsis tiav vim kev teeb tsa tsis raug (over-torquing, qias neeg flanges, lossis rov siv lub gasket) tsis raug them. Nco ntsoov ua raws li cov lus qhia installation muab nrog cov khoom.

 

Txhawm rau ua kom koj qhov kev yuav khoom tau yooj yim thiab yooj yim, peb muab ntau yam kev xaiv them nyiaj ruaj ntseg:

Peb nyob ntawm no los ua kom koj cov txheej txheem xaj kev txhawj xeeb-dawb - xaiv txoj kev them nyiaj uas ua haujlwm zoo tshaj rau koj!

 

 

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