Lokacin da wani ya nemi mafi kyawun mai yin gasket a cikin hanyoyin fasaha na kore - ya kasance tsarin hydrogen, electrolyzers, sel mai, ko masu musayar zafi mai inganci - ilhami na farko shine in tura baya. Babu mafi kyawun duniya. Tarko ne, kamar neman mafi kyawun kayan aiki ba tare da tantance ko kuna yanke itace ko siffata ƙarfe ba. Ainihin tambaya ita ce: wanne sealant ne ke aiwatar da dogaro a ƙarƙashin takamaiman yanayi, sau da yawa azabtarwa, yanayi yayin daidaitawa da muhalli da dorewar ƙa'idodin fasahar kore? A nan ne tattaunawar ke yin rikici, kuma inda manyan ma'ajin kayan masarufi suka kasa yin bala'i.

Babban Kalubalen: Ba kawai Game da Rufewa ba

Green tech Applications sun sake bayyana gazawar. A cikin injin mota na gargajiya, gaket ɗin kuka na iya nufin raguwar mai a hankali. A cikin takin tantanin man fetur na hydrogen, ƙarancin hatimin hatimi na iya haifar da ƙetare iskar gas, guba mai ƙarfi, ko wani lamari mai mahimmanci na aminci. Kafofin watsa labaru suna da tashin hankali: ruwa mai lalacewa, hydrogen (duka gaseous da proton form), hawan zafi daga cryogenic zuwa 90 ° C+, kuma wani lokacin acid mai laushi ko tushe. Dole ne mashin ɗin ku ya zama marar amfani da sinadarai, ya mallaki manne na dogon lokaci, kuma ya kula da elasticity ƙarƙashin saitin matsawa. Na ga ƙungiyoyin da ba su dace ba zuwa silicone na RTV mai zafi, kawai sai na same shi ya lalace bayan sa'o'i 500 a cikin yanayin simintin man fetur na PEM, yana sanya silicone cikin membrane. Wannan tarin $50k da bututun $10 ya lalata.

Daidaiton kayan aiki shine ƙofar farko. Don sabis na hydrogen, musamman tare da abubuwan ƙarfe, dole ne ku guje wa abubuwan da za su iya haifar da ƙulla hydrogen ko ƙunshi chlorides, sulfides. Yawancin flange sealants daga duniyar mai & gas sun fito daidai. Don masu amfani da lantarki da ke sarrafa KOH ko ruwa mai lalacewa, kuna buƙatar juriya ga saponification da hydrolysis. Gacets na tushen Epoxy-in-place (FIPGs) na iya zama mai kyau ga tsayayyen flanges na ƙarfe-zuwa-karfe a cikin masu musayar zafi, amma suna da ƙarfi. Idan akwai rashin daidaituwa ko haɓakar haɓakar thermal, suna fashe. Ciniki ne.

Sannan akwai bayanin magani. A cikin samarwa, ba koyaushe za ku iya samun cikakken magani na sa'o'i 24 a cikin zafin jiki ba. Wasu wurare suna amfani da warkarwa mai saurin zafi. Amma dole ne ku tabbatar da cewa yanayin zafi ba ya haifar da fitar da hayaki wanda ke gurbata muhalli mai tsafta. Na tuna layin mai tattara zafin rana inda zaɓaɓɓen anaerobic sealant ya warke da sauri a kan bututun jan ƙarfe mai dumi a lokacin taron bazara, wanda ke haifar da cika cikawa da ɗigogi wanda kawai ya bayyana bayan hawan keke a cikin filin. Mafarki mai ban tsoro don farashin garanti.

Yanayin Samfuri: Bayan Takardun Bayanai

Za ku ga manyan sunaye kamar Henkel (Loctite), ThreeBond, Permatex. Takaddun bayanan fasaha su ne mafari ne, amma takaddun talla ne. Makullin shine magana da injiniyoyin aikace-aikacen su kuma sami samfuran gwaji don takamaiman ingancin ku. Don madaidaicin hatimi a cikin faranti mai sanyaya baturi, Na sami sakamako mai kyau tare da takamaiman Loctite silicone, jerin 5900, wanda aka tsara don masu musayar zafi. Yana da kyau mannewa zuwa aluminum da ƙarancin acetic acid sakin yayin warkewa (don haka ƙarancin lalata akan filaye masu mahimmanci).

Don aikace-aikacen da ke da alaƙa da hydrogen, akwai haɓakar haɓaka don fluorosilicones da perfluorinated elastomers. Suna da tsada, amma juriyarsu ta kimiyya ba ta misaltuwa. Kamfanin kamar Hannun Zetai Mretering co., Ltd.-yayin da yake da farko mai ƙera fastener a cikin babban ma'auni na sashin tushe na China - ya fahimci wannan kusanci. Suna ganin buƙatun ƙwararrun hanyoyin ɗorawa na ƙwanƙwasa a cikin majalissar fasaha ta kore da buƙatar dabarun rufewa masu dacewa. Ziyartar shafin kamar zitaifaseners.com, kuna fahimtar yanayin yanayin masana'antu; ba kawai game da kullin ba, yana da game da cikakken haɗin gwiwa, wanda babu makawa ya haɗa da gasket ko sealant. Amfanin kayan aikin wurin su kusa da manyan hanyoyin sufuri yana nuna ma'aunin wadatar da ake buƙata don manyan ayyukan fasaha na kore.

Kada ku manta da gaskets da aka riga aka yi. Wani lokaci ruwa shine amsar da ba daidai ba. Don manyan, lebur flanges a cikin firam ɗin lantarki, yanke takarda na faɗaɗa PTFE (ePTFE) kamar na Gore's ko takaddar graphite mai lanƙwasa na iya fin duk wani abin da aka yi amfani da shi, musamman don kiyayewa da rarrabawa. Amma ka biya shi.

Tabbatar da Quagmire

Wannan shi ne inda ka'idar ta hadu da niƙa. Kuna buƙatar ƙa'idar gwaji wacce ta kwaikwayi ainihin rayuwar sabis, mai sauri amma ba maras gaskiya ba. Kuskure na gama gari shine kawai yin gwajin riƙe matsi a yanayin ɗaki. Wannan ya gaya muku kusan komai. Kuna buƙatar hawan keke na zafi, watsa labarai, da rawar jiki idan an zartar. Mun gina jig ɗin gwaji mai sauƙi wanda ke riƙe takaddun shaida a cikin wanka na ruwa mai yawo a 80 ° C, tare da girgiza yanayin zafi na mako-mako zuwa 5°C. Muna matsa lamba a keke shi kullun. Likitan da ya yi kama da kamala bayan wata ɗaya wani lokaci yakan ƙasƙanta kuma yana zubowa da wata uku. Wannan shine lokacin da kuke aiki dashi.

Wani mahimmin mahimmanci, sau da yawa mantawa, abu shine shiri na saman. Mafi kyawun abin rufewa zai kasa a kan gurɓataccen wuri ko da ba daidai ba. Don karafa, fashewar fashewar haske yana biye da gogewar ƙarfi (kamar barasa isopropyl) daidai yake. Amma ga wasu haɗe-haɗe da aka yi amfani da su a cikin tankuna masu nauyi na hydrogen, sauran ƙarfi na iya kai hari ga guduro. Kuna iya buƙatar maganin plasma. Na koyi wannan hanya mai wuya akan aikin jirgin ruwa mai haɗa fiber na fiber. Sealant bead ya bare bayan an warke. Matsalar ba samfurin ba ce; shi ne mai sheki, ragowar wakili na saki da ba mu cika cirewa ba.

Farashin vs. Dogara: Ƙididdigar Koren Gaskiya

A cikin fasahar kore, kore kuma yana nufin tsawon rai da ƙarancin sharar gida daga gazawa. Mai arha acrylic gasket maker zai iya ajiye $50 kowace raka'a amma ya haifar da gazawar filin 5%. Kudin gyarawa, lalacewar tambari, da sharar albarkatun albarkatu (maye gurbin tsarin duka) sun dwarar ceton farko. Dole ne jimlar kuɗin binciken ikon ku ya haɗa da wannan. Wani lokaci, ƙididdige ƙima, ingantaccen samfur kamar ThreeBond 1215 (don ƙwayoyin mai) ko ƙwararrun epoxy shine kawai motsi mai hankali na kuɗi.

Matsalolin juriyar sarkar samarwa suna da mahimmanci. A lokacin karancin guntu na baya-bayan nan, mun kuma ga tashe-tashen hankula a cikin albarkatun sinadarai na musamman. Idan kun ƙirƙira samfurin dogaro akan tushen tushe guda ɗaya, madaidaicin sealant, kuna haɗarin layin samarwa ku. Samun ingantaccen tushe na biyu, ko da ɗan ƙasa mafi kyau, yana da hankali. Wannan shi ne inda yin hulɗa tare da masana'antun da ke da isa ga duniya da tsire-tsire masu yawa, ko manyan masu samar da masana'antu da aka saka a cikin cibiyoyi kamar gundumar Yongnian, na iya samar da kwanciyar hankali.

To, Menene Amsar?

Abin takaici ba takamaiman ba ne, amma gaskiya ne: mafi kyawun mai yin gasket shine wanda ya wuce ƙaƙƙarfan gwajin tabbatar da ƙayyadaddun aikace-aikace. Fara ta hanyar ayyana ainihin kafofin watsa labarai, kewayon zafin jiki (min, max, da bayanin martaba na keke), matsa lamba (tsaye da tsauri), kayan ƙasa, rayuwar sabis da ake buƙata, da ƙayyadaddun tsarin taro. Sannan, gwada manyan ƴan takara biyu ko uku daga ƙwararrun masana'antun a cikin ainihin mahallin.

Don ƙaƙƙarfan jagora: don ƙarancin matsa lamba na gabaɗaya, tsarin tushen ruwa a cikin ɗan gajeren lokaci, silicone mai inganci, mai tsaka tsaki na iya isa. Don hydrogen da m sunadarai, duba zuwa fluorosilicones ko fluoropolymers. Don m, babban matsi na ƙarfe flanges, la'akari anaerobic ko epoxy FIPGs. Kuma ba, taba ƙetare ƙa'idar riga-kafi ta saman.

Ba amsa ce ta jima'i ba. Bai dace da kanun labarai ba. Amma a cikin ramuka na masana'antar fasahar kore, inda dogaro shine kawai abin da ke sa fasahar ta kasance mai ƙarfi, wannan ita ce kawai amsar da ke riƙe da ruwa-ko hydrogen, ga wannan al'amari. Makasudin ba shine samun samfurin sihiri ba, amma don injiniyan tsarin rufewa wanda ya ɓace, yana aiki daidai kuma ba a lura da shi ba don rayuwar samfurin. Wannan shine mafi kyawun gaske.