Kulungile, ake sinqamule umsindo. Uma usesha lokhu, kungenzeka ukuthi ugqolozele i-flange evuzayo noma uhlela ukwakha futhi imininingwane imane ithi i-gasket yezinga eliphezulu. Ugibe olukhulu wonke umuntu awela kulo wukucabanga ukuthi irabha kanye nokushisa okuphezulu kungahambisana isikhathi eside. Abakwazi. I-Neoprene iphonswa nxazonke ngenxa yomsebenzi wokukhathala ngezinye izikhathi, kodwa lokho kuvame ukulungisa ngokushesha okuholela ekuhlulekeni. I-Grafoil? Lelo elinye igama olizwayo. Kodwa akuyona into elula-noma. Kumayelana nokuthi uzisebenzisa kuphi futhi kanjani, futhi ngokweqiniso, kwesinye isikhathi akufanele ukusebenzise noma.

I-Neoprene Illusion in Hot Systems

Kudingeka ngigweme: ngisebenzisa okujwayelekile Ama-Gaskets we-Neoprene Ekukhishweni kweqiniso lokushisa okuphezulu kucela inkinga. Sikhuluma ngezinto ongazisebenzisela ukungena komoya noma ulayini wokupholisa. Ukuthandeka kwayo ukuguquguquka kanye nokuvala uphawu, ilungele izindawo ezingajwayelekile ezingeni lokushisa legumbi. Kodwa exhaust? Ngisho nesistimu enesizotha ifinyelela ku-250°C (482°F) kalula, futhi i-neoprene iqala ukuqina futhi iqhekeke cishe ku-120-130°C. Ngiyibonile. Uyithobisa phansi kupayipi eliphansi le-turbo, ivala kahle ekuqaleni kokuqala. Ngemva kwesonto, ngemva kwemijikelezo embalwa yokushisa, iguqulwa ibe idiski efiphele, emnyama. Isigxivizo sesihambile, uthola lokho kuvuza kwe-exhaust, futhi ubuyela ngaphansi kwemoto.

Kukhona i-caveat: ezinye izingxube ezikhethekile ze-high-temp neoprene zikhona, ngokuvamile ezinama-silicone, ezikalwe phezulu. Kodwa ngokuhlangenwe nakho kwami, nalezi zinophahla. Angase aphile endaweni ehlangene ye-muffler noma engxenyeni yomsila lapho izinga lokushisa liphansi khona, ithi ngaphansi kuka-200°C. Kepha ngezihloko, amapayipi aphezulu, ama-turbo manifolds — khohlwa. Ukuwohloka kwe-thermal yisikhathi, hhayi uma. Izindleko ze-gasket ziphansi, kodwa izindleko zabasebenzi zokwenza umsebenzi kabili ziphakeme.

Ngigcine kuphi ukubona i-neoprene gasket ihluleka ngendlela emangalisayo? Imoto yethrekhi yomngane ene-exhaust yangokwezifiso. Wasebenzisa i-neoprene donut gasket esitokisini se-v-band eduze nekati, ecabanga ukuthi i-clamp load izoyiphatha. Kwenzekile, amaseshini amabili. Ukushisa kwenze okokusebenza kugeleza futhi kwaminyanisa ngokungalingani, okuholele ekuqhumeni nokuvuza okubi ngaphambi nje kweseshini. Sayishintsha ukuze sithole i-gasket yensimbi efanele khona lapho. Isifundo: Inkumbulo yezinto ezibonakalayo ibalulekile. I-Neoprene iyalahleka uma ibhakwa.

I-Grafoil: I-Go-To, Kodwa Nge-Gripes

I-Grafoil gaskets, noma ngokunembile, ama-graphite gaskets aguquguqukayo, ayimpendulo ezenzakalelayo ngesizathu. Ziphatha kahle izinga lokushisa—sikhuluma ngesevisi eqhubekayo efika ku-450-500°C emkhathini ongena-oxidizing, ngisho neziqongo eziphakeme. Zivumelana nokungapheleli kwe-flange, okuyisindisi sempilo ezinhlobonhlobo ezindala, ezisonteke kancane. Uyayibophela phansi, iyashibilika igcwale izigodi ezincane kakhulu. Amandla abo angempela lawo.

Kodwa banamadimoni abo. Okokuqala ukuphumula kwe-creep, noma ukugeleza okubandayo. Ngokuhamba kwesikhathi, ikakhulukazi ngaphansi komthwalo we-clamp nokushisa okuphezulu, i-graphite ingacindezela kancane futhi ibe mncane. Uma ama-bolts akho engakhiqizi i-torque-to-isivuno noma ungenawo amawasha asentwasahlobo, amandla okubamba ayancipha, bese uthola ukuvuza. Ngihlala ngincoma i-retorque ngemva kwemijikelezo embalwa yokuqala yokushisa uma kungenzeka. Okwesibili, futhi lokhu kubalulekile: abakuthandi ukufakwa kwegesi ephumayo enesivinini esiphezulu. I-graphite ingashaywa ngokoqobo uma kunegebe elikhulu noma ukungahambi kahle. Ngihlale ngibheka ubuso be-flange ukuze ngihambisane ngaphambi kokubufaka.

Olunye udaba luyasingathwa. I-graphite ehlanzekile ithambile. Uma ufaka i-grafoil gasket ku-flange eqondile noma engaphezulu, kungase kube buhlungu ukuhlala endaweni ngenkathi uqalisa amabhawodi. Ezinye ziza nomgogodla wensimbi onembobo noma ama-adhesive backings, asizayo. Lezo ezinensimbi engagqwali ziqine kakhulu kodwa azihambelani kancane. Kuwukuhwebelana.

I-Oxidation kanye Nesici Esikhohliwe

Nansi imininingwane eminingi abayiphuthelwa: i-oxidation. Emzileni wokukhipha umoya onomoya-mpilo omningi, i-graphite ingakhipha i-oxidize kancane ngaphezu kuka-400°C, ikakhulukazi emaphethelweni. Iphenduka umlotha oyimpuphu, inciphise i-gasket. Lokhu ngokuvamile akukona ukwehluleka okuyinhlekelele emotweni yasemgwaqweni, kodwa ohlelweni oluqhubekayo lomthwalo omkhulu—cabanga ukuthi i-generator esebenza ngomthamo ogcwele izinsuku—ingaba into egqokwayo. Ngidonse ama-gaskets e-grafoil ezindlini ze-turbo ezazincane kakhulu emaphethelweni angaphakathi ashisayo. Kulezi zindawo ezimbi kakhulu, i-gasket yensimbi enezingqimba ingaba ngcono.

Lapho Ayikho Impendulo Elungile

Yilapho isipiliyoni sangempela senkundla siqala khona. Kunezimo lapho kokubili i-neoprene ne-grafoil kuwukukhetha okungalungile. Eyodwa ingeyezinga lokushisa eliphezulu kakhulu, amajoyinti anomfutho ophezulu, njengaphakathi kwendlu ye-turbocharger kanye namanifold. Lapha, ama-gaskets ensimbi enezingqimba eziningi (MLS) ayinkosi. Abanyakazi, baphathe amabhayisikili ashisayo ngobuchule, futhi bamelane nokushaywa umoya.

Enye iwukuba ama-flange anezikhala ezinkulu noma ama-flanges ampofu. Ayikho into evala isikhala. I-Neoprene izokhipha futhi ihluleke; i-grafoil izoqhuma noma ichoboze ngokungalingani. Ukulungiswa kuwumshini we-flange noma usebenzise into ewugqinsi, eqinile njengenhlanganisela eqiniswe nge-ceramic. Lokhu ngikufunde kabuhlungu kumshini wokukhipha amanzi kubhayela wezimboni. Sizame ishidi le-grafoil eliwugqinsi, kodwa i-warpage ye-flange yayingaphezu kuka-1mm. Yavuza ngokushesha. Ikhambi kwaba ukuvuselela i-flange futhi kusetshenziswe i-gasket yensimbi eboshiwe ene-graphite filler—ikhambi eliklanywe ngokwengeziwe.

Ngezinye izikhathi, impendulo ayikho i-gasket nhlobo. Amajoyinti afakwe ngomshini kahle, ayisicaba, futhi abushelelezi ensimbi-kuya-metal ane-anti-sealant yezinga lokushisa eliphezulu noma i-sealant (njengamanamathisela ethusi athile) angathembeka kakhudlwana ekuxhumekeni okuthile kwe-V-band noma kobuso obuyisicaba, asuse isixhumanisi esibuthakathaka sento ecindezelwayo ngokuphelele.

Ukuthola Namaqiniso Angokoqobo

Ungathenga lawa ma-gaskets noma yikuphi, kodwa ikhwalithi iyahluka kakhulu. I-grafoil eshibhile ingaba nokungcola noma ukuminyana okungaguquki, okuholela ezindaweni ezishisayo nokwehluleka. Ngezinhlelo zokusebenza ezibucayi, nginamathela kumabhrendi aziwayo noma abahlinzeki abanikeza imininingwane ebalulekile. Kuyafaneleka futhi ukucutshungulwa kwesistimu yokubopha njengengxenye yesixazululo sokuvala uphawu. Ibhawodi elibuthakathaka elinwebeka ngokushisa liphula umthwalo we-clamp. Kungakho ngomsebenzi wokuqeda amandla, ngivame ukuthola i-Hardware kochwepheshe abaqonda izidingo ezishisayo, njengokuthi I-Handan Zitai Fetesser Comment Co, Ltd.. Bazinze e-Yongnian, ihabhu le-fastener yase-China, futhi bahlinzeka ngomkhakha omningi. Ukwazi amabhawodi nama-studs akho kuvela kusizinda esikhulu sokukhiqiza esinezilawuli eziqinile, ezifinyeleleka ngesayithi labo kokuthi https://www.zitaifasteners.com, kusho okuhlukile okukodwa okumele ukhathazeke ngakho lapho yonke inhlangano ishisa futhi ipholisa ngokuphindaphindiwe.

Esitezi sesitolo, umthetho wami wesithupha yilo: emisebenzini eminingi yokukhipha umoya emigwaqweni ngemuva kwe-catalyst lapho izinga lokushisa limaphakathi (ngaphansi kuka-350°C), i-gasket ye-grafoil yekhwalithi ilungile ngokuphelele. Vele uyifake endaweni ehlanzekile, eyisicaba kanye ne-retorque. Ngezinhlelo zokusebenza ze-pre-catalyst, i-turbo, noma unhlokweni, ngincika kunsimbi enezingqimba noma kuma-gaskets ensimbi eqinile. I-Neoprene? Ngiyigcinela amapayipi okungenisa, amakhava, nanoma yini ehlala ipholile. Kumayelana nokufanisa iqiniso lezinto ezibonakalayo nesihluku sesistimu. Ukushisa kwe-exhaust akuphazamisi.

Ukuthatha Okokugcina: Kuyisistimu, Hhayi Ingxenye Nje

Ngakho, i-neoprene vs. grafoil? Akukhona ngempela ukuphikisana. Zingamathuluzi emisebenzi eyahlukene. I-Neoprene ingeyezinga lokushisa eliphansi, ukuvala uphawu okumile. I-Grafoil ingeyokuvaleka okuvumelanayo, izinga lokushisa eliphakeme lapho izimo zingezimbi kakhulu. Umnyakazo wangempela wobungcweti ukuxilonga lonke ilunga: iphrofayili yezinga lokushisa, isimo se-flange, ikhwalithi yebhawudi, nokuhamba ngebhayisikili okushisayo. Ngichithe isikhathi nemali ngisola izinto ze-gasket lapho inkinga bekuyi-flange esontekile noma amandla okubamba anganele.

Iseluleko sami? Ungamane ukhethe ngokusekelwe esincomweni esijwayelekile. Cabanga ngendawo ethile emfudlaneni we-exhaust, izinga lokushisa eliphakeme elizolibona, nemiphumela yokuvuza. Kwesinye isikhathi, ukusebenzisa imali ephindwe kathathu ku-premium multi-layer metal gasket ye-turbo flange ebalulekile kuyinketho eshibhe kakhulu ngokuhamba kwesikhathi ngoba wenza umsebenzi kanye kuphela. Futhi njalo, qala ngendawo enhle, eyisicaba kanye nezibophelelo ezifanele zokushisa. Konke okunye kwakhela phezu kwaleso sisekelo.