Oyena umenzi wegasket wetekhnoloji eluhlaza? 

Xa umntu ecela umenzi we-gasket ogqwesileyo kwiimeko zobuchwepheshe obuluhlaza-nokuba ziinkqubo ze-hydrogen, i-electrolyzers, iiseli zepetroli, okanye i-high-efficiency exchangers heat-ingqondo yam yokuqala kukubuyela umva. Akukho nto ingcono kwihlabathi. Kungumgibe, kufana nokucela esona sixhobo silungileyo ngaphandle kokuchaza ukuba usika iinkuni okanye ubumba isinyithi. Owona mbuzo ngulo: yeyiphi i-sealant esebenza ngokuthembekileyo phantsi kweemeko ezithile, ezihlala zisohlwaya, ngelixa zilungelelaniswa nezigunyaziso zokusingqongileyo kunye nokuqina kobugcisa obuluhlaza? Kulapho incoko iba mdaka, kwaye apho izisombululo zevenkile yezixhobo eziqhelekileyo zisilela ngokuyingozi.

Umceli mngeni ongundoqo: Akunjalo malunga nokutywinwa

Usetyenziso lwetekhnoloji eluhlaza luchaza ukusilela kwakhona. Kwi-injini yemoto yemveli, i-gasket yokulila inokuthetha ukuvuza okucothayo kwe-oyile. Kwi-stack ye-hydrogen fuel cell, ukungaphumeleli kwetywina okuncinci kunokukhokelela kwi-gas crossover, i-catalyst poisoning, okanye isiganeko esibalulekileyo sokhuseleko. Imithombo yeendaba inobudlova: amanzi adibeneyo, i-hydrogen (zombini i-gaseous kunye ne-proton form), imijikelezo ye-thermal ukusuka kwi-cryogenic ukuya kwi-90 ° C +, kwaye ngamanye amaxesha i-acids epholileyo okanye iziseko. I-sealant yakho kufuneka ibe ne-inert yekhemikhali, ibe ne-adhesion yexesha elide, kwaye igcine i-elasticity phantsi kwe-compression set. Ndibone amaqela angagqibekanga kwi-silicone ye-RTV ephezulu, kuphela ukuyifumana ibola emva kweeyure ze-500 kwindawo ye-PEM yeeseli zamafutha, i-silicone ye-leaching kwi-membrane. Leyo yi-50k ye-stack yonakaliswe yi-tube ye-10 yeedola.

Ukuhambelana kwezinto eziphathekayo lisango lokuqala. Kwinkonzo ye-hydrogen, ngokukodwa ngamacandelo esinyithi, kufuneka ugweme i-sealants enokubangela i-hydrogen embrittlement okanye iqulethe i-chlorides, i-sulfides. Izitywini ezininzi ze-flange ezivela kwihlabathi leoli kunye negesi ziphumile. Kwi-electrolyzers ephethe i-KOH okanye amanzi adibeneyo, udinga ukuchasana ne-saponification kunye ne-hydrolysis. I-epoxy-based form-in-place gaskets (FIPGs) inokuba yinto ebalaseleyo kwi-rigid, i-metal-to-metal flanges kwiindawo zokutshintsha ubushushu, kodwa zi-brittle. Ukuba kukho nayiphi na i-flex okanye i-thermal yokwandisa ukungalingani, bayaqhekeka. Lurhwebo-off.

Emva koko kukho iprofayili yonyango. Kwimveliso, awukwazi ukuhlala uhlawula unyango olupheleleyo lweeyure ezingama-24 kwiqondo lokushisa. Ezinye iindawo zisebenzisa ukunyanga okukhawuleziswa kobushushu. Kodwa kufuneka uqiniseke ukuba iqondo lokushisa eliphakamileyo alidali ukukhupha umoya okungcolisa indawo yendibano ecocekileyo. Ndikhumbula umgca wokuqokelela i-thermal yelanga apho i-anaerobic sealant ekhethiweyo iphiliswe ngokukhawuleza kwimibhobho yobhedu efudumeleyo ngexesha lendibano yasehlotyeni, ekhokelela ekufakweni okungaphelelanga kunye nokuvuza okuvele emva koxinzelelo lokuhamba ngebhayisikile ebaleni. Iphupha elibi ngeendleko zewaranti.

Ubume beMveliso: Ngaphaya kwePhepha leDatha

Uya kubona amagama amakhulu njengeHenkel (Loctite), iThreeBond, iPermatex. Amaxwebhu abo obugcisa ayindawo yokuqala, kodwa ngamaxwebhu okuthengisa. Undoqo kukuthetha neenjineli zabo zezicelo kwaye ufumane iisampulu zovavanyo lokuqinisekiswa kwakho okuthe ngqo. Ukutywinwa kwe-static kwiipleyiti zokupholisa ibhetri, ndibe neziphumo ezilungileyo kunye ne-silicone ye-Loctite ethile, i-series ye-5900, eyenzelwe abatshintshi bokushisa. Inoncanyelo olululo kwi-aluminiyam kunye nokukhutshwa kweasidi encinci ye-acetic ngexesha lokunyanga (ngoko ke umngcipheko omncinci wokuhlwa kwiindawo ezinobuthathaka).

Kwizicelo ezinxulumene ne-hydrogen, kukho i-niche ekhulayo ye-fluorosilicones kunye ne-elastomers ene-perfluorinated. Banexabiso, kodwa ukuxhathisa kwabo kweekhemikhali akunakulinganiswa. Inkampani efana I-Sunnian Zitai Festener Fishaner Comment Com.-ngelixa ngokuyintloko umvelisi we-fastener kwisiseko senxalenye esisiseko saseTshayina-uyayiqonda le ndibano. Babona imfuno yezisombululo ezikhethekileyo zokuqinisa kwiindibano zetekhnoloji eluhlaza kunye nesidingo sezicwangciso ezihambelanayo zokutywina. Ukutyelela indawo efana I-Zitafasteners.com, ufumana ingqiqo ye-ecosystem yemizi-mveliso; akukhona nje malunga nebholiti, malunga nengqibelelo yonke edibeneyo, ebandakanya ngokuqinisekileyo i-gasket okanye i-sealant. Uncedo lweendawo zabo kufutshane neendlela ezinkulu zothutho lubonisa ubungakanani bobonelelo olufunekayo kwiiprojekthi ezinkulu zetekhnoloji eluhlaza.

Musa ukungazihoyi ii-gaskets ezenziwe ngaphambili. Ngamanye amaxesha ulwelo yimpendulo engalunganga. Kwiiflange ezinkulu, ezisicaba kwiifreyimu ze-electrolyzer, ishidi elisikiweyo le-PTFE eyandisiweyo (ePTFE) njenge-Gore's okanye i-laminated graphite sheet inokugqithisa nayiphi na i-sealant esetyenzisiweyo, ngokukodwa ukugcinwa kunye nokuchithwa. Kodwa uyayihlawula.

I-Quagmire yoQinisekiso

Kulapho ithiyori idibana khona negrinder. Udinga iprothokholi yovavanyo elinganisa ubomi benkonzo yokwenyani, ekhawulezileyo kodwa engenzekiyo. Impazamo eqhelekileyo kukwenza uvavanyo oluzinzileyo loxinzelelo kwiqondo lobushushu begumbi. Loo nto ikuxelela phantse nto. Udinga ibhayisekile eshushu, ukuvezwa kwimidiya, kunye nokungcangcazela ukuba kufanelekile. Sakhe ijigi yovavanyo elula ebambe iikhuphoni ezivaliweyo kwindawo yokuhlambela enamanzi adiyoniyoni ajikelezayo kwi-80°C, kunye nokothuka kweveki yonke kwe-thermal ukuya kutsho kwi-5°C. Sasiyibhayisekile yonke imihla. I-sealant ekhangeleka igqibelele emva kwenyanga ngamanye amaxesha yayinokuthotywa kwaye ivuze ngenyanga yesithathu. Lo ngumgca wexesha osebenza nawo.

Enye into ebalulekileyo, esoloko ilityalwa, kukulungiselela umphezulu. Eyona sealant iya kusilela kumhlaba ongcolisekileyo okanye owenziwe ngendlela engafanelekanga. Kwizinyithi, ukugqabhuka kwe-abrasive ukukhanya okulandelwa yi-solvent wipe (njenge-isopropyl alcohol) kusemgangathweni. Kodwa kwezinye iicomposites ezisetyenziswa kwiitanki ze-hydrogen ezikhaphukhaphu, isinyibilikisi sinokuhlasela i-resin. Unokufuna unyango lweplasma. Ndiyifunde le ndlela enzima kwiprojekthi yenqanawa yoxinzelelo lwe-carbon fiber composite. I-bead ye-sealant ixobukile emva konyango. Ingxaki yayingeyomveliso; ibingumbala omenyezelayo, intsalela yokukhutshwa ngundo esingakhange siyisuse ngokupheleleyo.

Iindleko vs. Ukuthembeka: Ubalo lokwenyani loLuhlaza

Kwitekhnoloji eluhlaza, uhlaza lukwathetha ixesha elide kunye nenkcitho encinci evela kwiintsilelo. Umenzi we-acrylic gasket onexabiso eliphantsi unokonga i-50 yeedola ngeyunithi nganye kodwa abangele ukusilela kwe-5%. Iindleko zokulungisa, ukonakala kwebrendi, kunye nenkcitho yemithombo (ithatha indawo yemodyuli iyonke) kunciphisa ugcino lokuqala. Ixabiso lakho lilonke lohlalutyo lobunini kufuneka libandakanye oku. Ngamanye amaxesha, ukucacisa iprimiyamu, imveliso eqinisekisiweyo efana ne-ThreeBond 1215 (yeeseli zepetroli) okanye i-epoxy ekhethekileyo kuphela kwentshukumo ephilileyo ngokwasezimalini.

Ukomelela kwekhonkco lonikezelo nakho kubalulekile. Ngexesha lokunqongophala kwe-chip yamva nje, siye sabona ukuphazamiseka kwizinto ezikhethekileyo zeekhemikhali ezikrwada. Ukuba uyila imveliso exhomekeke kumthombo omnye, isitywini esingaqhelekanga, ubeka umngcipheko kumgca wakho wemveliso. Ukuba nomthombo wesibini ofanelekileyo, nokuba ungaphantsi kancinci, kububulumko. Kulapho ukusebenzelana nabavelisi abanokufikelela kwihlabathi kunye nezityalo ezininzi, okanye abathengisi bemizi-mveliso abakhulu abafakwe kwii-hubs ezifana neSithili saseYongnian, kunokubonelela ngozinzo.

Ke, ithini impendulo?

Iyadanisa ayithethi ngokuthe ngqo, kodwa iyinyani: oyena umenzi we-gasket nguye odlula uvavanyo lwakho olungqongqo, oluchanekileyo lokuqinisekiswa kwesicelo. Qala ngokuchaza imidiya echanekileyo, uluhlu lweqondo lokushisa (min, max, kunye neprofayili yebhayisikile), uxinzelelo (i-static kunye ne-dynamic), izixhobo ze-substrate, ubomi benkonzo obufunekayo, kunye nemiqobo yenkqubo yendibano. Emva koko, vavanya abantu ababini okanye abathathu abakhuphisanayo abaphezulu abasuka kubavelisi abahlonelwayo kuloo ndawo ichanekileyo.

Kwisikhokelo esirhabaxa: kuxinzelelo oluphantsi oluqhelekileyo, iinkqubo ezisekelwe kumanzi kwimozulu epholileyo, i-silicone ekumgangatho ophezulu, engathathi hlangothi inokwanela. Kwi-hydrogen kunye nekhemistri enobundlobongela, jonga kwi-fluorosilicones okanye i-fluoropolymers. Kwiiflange zentsimbi eziqinileyo, ezinoxinzelelo oluphezulu, qwalasela i-anaerobic okanye i-epoxy FIPGs. Kwaye ungaze utsibe iprotocol yokulungiselela umphezulu.

Ayiyompendulo enomtsalane. Ayingeni kwisihloko. Kodwa kwimisele yokuvelisa i-teknoloji eluhlaza, apho ukuthembeka kuyona nto kuphela eyenza iteknoloji isebenze, le yimpendulo kuphela ephethe amanzi-okanye i-hydrogen, ngaloo nto. Injongo ayikokufumana imveliso yomlingo, kodwa kubunjineli benkqubo yokutywina enyamalalayo, esebenza ngokugqibeleleyo kwaye ingaqatshelwa kubomi bemveliso. Yeyona nto ilungileyo.