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Saƙar zuma yumbu catalytic Converter tare da mai ɗaukar ƙarfe

Takaitaccen Bayani:

yumbun saƙar zuma wani nau'in yumbun saƙar zuma nau'i ne na yumbu mai ƙyalli da bango.Siffar sashin giciye na ramukan saƙar zuma da aka rarraba daidai gwargwado na iya zama hexagonal, murabba'i, triangular, madauwari da sauran siffofi na geometric.


Cikakken Bayani

Tags samfurin

Samfuran yumbura na zuma suna da tashoshi masu kama da juna da yawa, don haka asarar matsin lamba na kwararar iskar gas yana da karami, kuma rarrabawar kwarara a cikin duka bangaren yana da kyau.Haɗe tare da tsarin cibiyar sadarwa na bakin ciki mai katanga na yumbun saƙar zuma, suna da nauyi mai nauyi, ƙayyadaddun ƙarfi da babban yanki na musamman.Ana amfani da su sosai a cikin masu musayar zafi, radiators, masu ɗaukar kuzari, kayan hana sauti, da sauransu.

A fannin tsarkake shaye-shayen ababen hawa, yumburan zumar zuma suna taka muhimmiyar rawa a matsayin mai ɗaukar nauyi.Wannan shi ne saboda catalytic dauki na sharar mota na iya kunna abubuwa masu cutarwa (kamar carbon monoxide, hydrocarbons, nitrogen oxides, da sauransu) a cikin shaye-shaye da aiwatar da halayen sinadarai don canza su zuwa carbon dioxide, ruwa da nitrogen mara lahani.Kayan yumbura na saƙar zuma suna ba da muhimmin wuri don mannewar abubuwan haɓakawa.Mai ɗaukar abin hawa yana gabatar da takamaiman buƙatu masu zuwa don yumbun saƙar zuma:

Kyakkyawan kwanciyar hankali thermal.A shaye zafin jiki na mota engine ne tsakanin 250-950 ℃, amma wani lokacin ma fiye da 950 ℃, wanda zai iya kai ga canji lokaci na goyon bayan abu a high zazzabi, shafi aiki da kuma sabis rayuwa na mai kara kuzari, don haka da bukatun ga da thermal kwanciyar hankali na mai kara kuzari goyon baya ne high.

Babban ƙarfin injiniya.Shaye-shaye na injin yana da girgizar zafi, filin hanya mai cike da cunkoso da girgizar silinda, wanda duk ya gabatar da buƙatun ƙarfi don tallafin mai kara kuzari.

Babban yanki na musamman na musamman.Ƙayyadaddun yanki na musamman na goyon bayan mai kara kuzari yana da girma, wanda ya dace da abin da aka makala da kuma watsar da abubuwa masu tasiri, don haka zai iya inganta aikin mai kara kuzari.

Ƙarfin zafi.Lokacin da injin ya fara sanyi, kwandon yana samar da ƙarin carbon monoxide da hydrocarbons.Idan ƙarfin zafi na mai ɗaukar nauyi ya yi ƙasa, mai haɓakawa zai iya isa yanayin zafin aiki a cikin ɗan gajeren lokaci kuma yana taka rawar gani da wuri da wuri.

Kyakkyawan juriya na lalata.Shaye-shayen ababen hawa yana ƙunshe da iskar gas da yawa.

Ƙananan juriya na iska.Shigar da mai ɗaukar hoto zai haifar da matsa lamba na baya akan injin, wanda ba dole ba ne ya shafi aikin injin ɗin na yau da kullun gwargwadon yuwuwar.Sabili da haka, ana fatan cewa bambancin matsa lamba da aka haifar bayan jigilar iska ta ratsa ta cikin mai ɗaukar kaya zai zama kadan kamar yadda zai yiwu.

Low coefficient na thermal fadadawa.Ƙarƙashin haɓakar haɓakar haɓakar thermal yana dacewa da tallafin mai haɓakawa don tsayayya da yanayin aiki na saurin sanyaya da saurin dumama ba tare da fashewa ba.

A halin yanzu, kayan kwalliyar saƙar zuma na cordierite galibi ana amfani da su azaman abin ɗaukar abin hawa.Kamfanin Corning na Amurka ne ya fara shirya kayan kwalliyar saƙar zuma na Cordierite (eh, gilashin Corning gorilla, wanda ke ba da gilashin baya ga wayar hannu ta Apple) ta hanyar gyare-gyaren extrusion a cikin 1960s.

Domin extrusion gyare-gyare na cordierite saƙar zuma tukwane, akwai biyu tsari zažužžukan: raw abinci da clinker, da kuma babban bambanci tsakanin biyu matakai ne ko akwai pre kira mahada na cordierite foda.A cikin tsarin clinker, cordierite foda an haɗa shi da farko, sa'an nan kuma extruded;A cikin tsarin abinci mai ɗanɗano, an haɗa cordierite ta hanyar extrusion da sintering.Hoto na 4 yana nuna matakai biyu na samarwa na cordierite yumbun saƙar zuma.

Baya ga hanyoyin samar da kayayyaki daban-daban, kayan da ake amfani da su don kayan kwalliyar saƙar zuma na cordierite sun fito ne daga tushe da yawa, kuma manyan masana'anta kuma sun bambanta.Kamar yadda aka nuna a cikin hoto na 5, zamu iya ganin bambancin zaɓin albarkatun kasa.

Saboda babban aikin da ake buƙata na yumburan saƙar zuma na abin hawa (maɓalli da yawa da aka jera a sama), ƙayyadaddun kayan albarkatun ƙasa suna da tsauri.Misali, an kayyade cewa matsakaicin barbashi na cordierite foda yana cikin 10-50um, matsakaicin matsakaicin girman madogarar talc shine aƙalla 8um, matsakaicin matsakaicin matsakaicin ƙwayar alumina bai wuce 5um ba, kuma matsakaicin matsakaicin matsakaici. Girman barbashi na kaolin da cakuda kaolin calcined bai wuce 6um ba.

Bugu da ƙari, girman ƙwayar ƙwayar cuta, a cikin 'yan shekarun nan, an kuma gano cewa ilimin halittar jiki na cordierite foda yana da tasiri mai girma akan samfurin ƙarshe.Saboda siffar takarda yana da anisotropy mai karfi a lokacin gyaran fuska (an gabatar da wannan a cikin labarin da ya gabata game da gyare-gyaren extrusion. Yana da ma'ana cewa muna so mu guje wa anisotropy, amma me yasa ba za mu iya amfani da shi ba?).A cikin wata takardar izinin mallakar Amurka mai suna "anisotropiccordierite molonlish", Lachman im da sauransu suna yin cikakken amfani da zamewa da jujjuyawar kaolin mai laushi don sa ya kasance da yanayin fuskantar jirgin.Bayan harbe-harbe, ana iya aiwatar da tsarin daidaitawar hatsi na cordierite a cikin tsarin saƙar zuma.Cordierite mai daidaitawa yana da anisotropy a cikin haɓakar thermal, don haka yana iya kaiwa ƙaramin haɓaka haɓaka haɓakar thermal (ƙarshen haɓakar haɓakar thermal kawai 0.55) × 10-6 / ℃).

A halin yanzu, ainihin fasahar samar da manyan kayan kwalliyar saƙar zuma na cordierite har yanzu suna da ƙware da kamfanoni waɗanda Corning na Amurka da NGK na Japan ke wakilta.Koyaya, tare da ci gaba da haɓaka kasuwar dillalan abin hawa da ci gaba da haɓaka ƙarfin bincike na cikin gida, maye gurbin cikin gida don shigo da kaya yana zama gaskiya.

A karshe, ya kamata a lura da cewa, a baya-bayan nan, birnin Shanghai ya sanar da cewa, za a fara aiwatar da tsarin "shida na kasa" daga ranar 1 ga watan Yulin bana.Idan aka kwatanta da ma'auni biyar na ƙasa, ƙa'idodi shida na ƙasa gabaɗaya sun fi tsauri, musamman waɗanda suka haɗa da:

(1) An rage fitar da iskar Carbon monoxide daga motocin mai da kashi 50%

(2) Iyakar watsi da jimillar hydrocarbons da waɗanda ba methane jimlar hydrocarbons ya ragu da 50% (23% daga ƙasa IV zuwa ƙasa V)

(3) An ƙarfafa iyakar fitar da NOx da kashi 42% (an rage kashi 28% daga ƙasa IV zuwa ƙasa V)

Tare da saurin haɓakar kasuwannin motoci na cikin gida da haɓaka haɓakar ƙa'idodin hayaƙi, akwai babban buƙatun kasuwa don yumbu na cordierite na zuma don tsabtace iskar gas.An yi imanin cewa kayan ado na gida na cordierite na zuma don motoci na iya samun ci gaba mai kyau a nan gaba.

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