Eyona nto isetyenziswayo kwiigaskithi zerabha ye-nitrile? 

Ke, uyazibuza ngokunyaniseka, uninzi lwabantu lucinga ukuxhathisa ioyile kwaye ume apho. Esi sisiqalo esiqinileyo, kodwa siyayiphosa i-nuance. Enyanisweni, ixabiso lokwenyani le-NBR likwi-balance-compression set, i-decent abrasion resistance, kunye nokuchasana okuthembekileyo kweoli, i-fuel, kunye neekhemikhali ezininzi, zonke kwiindleko ezingaphuli ibhanki. Lihashe lomsebenzi, hayi iponi yokubonisa. Ubuqhetseba kukwazi apho ibhalansi isebenza khona kwaye iqala phi ukuhlukana.

Apho I-NBR Iqaqamba Ngokwenene: Indawo eSweet

Kum, i-classic, i-no-brainer application is in automotive fuel systems. Sithetha iimodyuli zepompo yepetroli, ukuthumela izitywina zeyunithi, i-carburetor gaskets (kwii-injini ezindala, ngokuqinisekileyo), kunye ne-O-rings eyahlukeneyo kwimigca. Eyona nto iphambili apha kukubonakaliswa rhoqo ipetroli kunye nedizili, esoloko inezongezo zale mihla zamafutha. Ikhompawundi eqhelekileyo ye-NBR, ithi ngomxholo we-acrylonitrile (ACN) ophakathi, iyiphatha kakuhle le nto. Ndikhe ndawabona ahlala iminyaka kwezi ndawo apho ubushushu bungafane budlule kwi-100°C. Kuyaqikelelwa.

Emva koko kukho ii-hydraulics zamashishini ngokubanzi. Hayi ukusebenza okuphezulu, iinkqubo ze-phosphate ester ezichasene nomlilo-ezo zizilwanyana ezahlukileyo-kodwa iinkqubo zakho eziqhelekileyo ze-oyile ye-oyile-based hydraulic kumatshini. Iigaskithi ezikwizigqubuthelo zevalvu, iireservoirs zolwelo, kunye nemibhobho yoxinzelelo oluphantsi. Baphantsi koxinzelelo rhoqo kwaye bahlamba ngeoli. Igasket ye-NBR eyenziwe ngokufanelekileyo apha ibonelela ngetywina elithembekileyo, ixesha elide. Imowudi yokusilela ihlala iqina kancinci kwiminyaka emininzi, hayi ukuvuthuza ngequbuliso okuyingozi, yiloo nto oyifunayo kucwangciso lolondolozo.

Enye indawo edla ngokungahoywa zizixhobo zokuhlambela ekwenziweni kokutya. Ngoku, ndive-i-NBR ayisiyiyo ibakala lokutya ngaphandle kokuba idityaniswe ngokuthe ngqo kwaye iqinisekisiwe. Kodwa kumatywina angaphandle kwizindlu zempompo, iigaskiti zokubeka kwizixhobo ezitshizwa ngamanzi ashushu, izicoci zecaustic, kunye nezicoci ezinobulali, yintshatsheli enexabiso eliphantsi. Ichasa ukudumba kunye nokuthotywa okuya kubulala i-gasket ye-EPDM eqhelekileyo kuloo sobho yeekhemikhali. Kuya kufuneka uqiniseke ngokuqinisekileyo ukuba ayinxibelelani ngokuthe ngqo nomjelo wemveliso.

Imida kunye neemeko eziphantse zibe

Kulapho amava akubiza imali, ngokuqhelekileyo ngokuphepha impazamo. Owona mgibe mkhulu bubushushu. Umda ophezulu we-NBR wamkelwa ngokubanzi njengendawo ejikeleze i-100-120 ° C eqhubekayo. Yityhale iye kutsho ku-135°C, kwaye ubude bobomi buyancipha. Ndifunde oku ngendlela enzima kumgca wokukhupha icompressor. I-specs ithe iyamelana neoyile, ke sasebenzisa i-NBR. Yasebenza… kangangeenyanga ezintandathu phambi kokuba ibhaka ibe bubumdaka obuqhekekileyo. Iqondo lobushushu lokukhupha okwethutyana belinyuka ngendlela engaphaya komda walo. Loo msebenzi wawufuna i-FKM (Viton) gasket. I-NBR yeyobushushu obuphakathi.

I-ozone kunye nemozulu yenye indawo ebuthathaka. Ukuba i-gasket iya kuboniswa ukukhanya kwelanga kunye nomoya wangaphandle, ngakumbi kufuphi nezixhobo zombane ezinokuvelisa i-ozone, i-NBR iya kuqhekeka. Ayisiyonto yangaphandle. Ndiyibonile isenzeka kufakelo lwangaphandle lwehydraulic kwizixhobo eziphathwayo ezihleli ixesha elide. Itywina lalikhangeleka lilungile wade walibamba laza laqhekeka. Kwezo meko, ubuyela kwi-EPDM okanye ikhompawundi ezinzileyo.

Emva koko kukho ukuhambelana kweekhemikhali ngaphaya kwee-hydrocarbons. I-Ketones, i-esters, i-acids eqinile, i-brake fluid (DOT 3, 4, 5.1) -ezi ziya kuhlasela i-NBR eqhelekileyo. Kukho ingcamango ephosakeleyo eqhelekileyo yokuba ukuxhathisa ioli kuthetha ukumelana neekhemikhali. Akunjalo. Ngalo lonke ixesha, hlala ujonga itshathi ehambelanayo yolwelo oluthile. Umniki-mpahla onolwazi olunzulu kunye nolwazi lobugcisa ubalulekile apha. Ngokomzekelo, inkampani efana I-Sunnian Zitai Festener Fishaner Comment Com., esebenza ukusuka kweyona nxalenye inkulu yesiseko yaseTshayina eYongnian, ihlala iphethe uluhlu lwamabakala ezinto eziphathekayo. Ngelixa eyaziwa ngokuba yi-fasteners, abaninzi abavelisi abadibeneyo abanjalo banikezela okanye banokucebisa kumacandelo okutywinwa okufanelekileyo kwindibano, ukuqonda ukuba i-bolt kunye ne-gasket kufuneka isebenze njengenkqubo. Indawo yabo kufutshane neendlela ezinkulu zothutho ezinje ngeBeijing-Guangzhou Railway ithetha ukuba bahlala bekhangela okanye bebonelela ngezixhobo zoluhlu oluninzi lwezicelo zemizi-mveliso, ukuze babone ukuba yintoni esebenzayo kunye nento engasileliyo entsimini.

AmaBanga ezinto eziphathekayo kunye noMtyholi kwiiNkcukacha

Ayiyiyo yonke i-NBR eyenziwe yalingana. Umxholo we-acrylonitrile yiyona lever ephambili. I-ACN ephezulu inika ukuchasana kweoli / i-fuel engcono kodwa ngexabiso lokuguquguquka okuphantsi kobushushu. Kwi-gasket kwi-Northern European hydraulic system ebona -20 ° C, i-ACN ephezulu ye-ACN ingaba nzima kakhulu ukuba itywine ngokufanelekileyo ekuqaleni. Uya kufuna umxube we-ACN ophantsi. Lurhwebo-off.

Emva koko kukho ukudibanisa-izigcwalisi, iiplastiki, kunye nenkqubo yokunyanga. Igaskithi yetywina eguquguqukayo (njengetywina leshaft) idinga ukuxhathisa okwahlukileyo kokuqhobosha kunye neempawu zeseti yoxinzelelo kunegasket yeflange emileyo. Umthengisi olungileyo uya kubuza malunga nesicelo: i-static okanye iguquguqukayo? Ubushushu obuqhubekayo? Imithombo yeendaba ezilulwelo? Uxinzelelo? Iimpendulo zixhomekeke kwikhompawundi. Igasket ye-NBR enexabiso eliphantsi, eyenziwe yafana neyokuqala, inokutywinwa ekuqaleni kodwa isilele kwangaphambi kwexesha kuba ibingenzelwanga uxinezeleko oluthile.

Ndikhumbula iprojekthi ebandakanya ukutywinwa kwenkqubo yokuxuba i-biodiesel. I-NBR eqhelekileyo yayisilela ngokukhawuleza. Umba wawungengoyena mafutha asisiseko, kodwa ukuxinwa okuphezulu kwee-esters kunye nokwenzeka kwezongezo ezinobundlobongela kumxube. Satshintshela kwi-hydrogenated nitrile (HNBR) gasket, enekhemikhali engcono kakhulu kunye nokumelana nokushisa, kwaye ingxaki yaphela. Isifundo yayikukujonga ngaphaya kwegama lolwelo elenziwe lafana nelo kudidi lwalo lwenyani, lwangoku.

Ukusetyenziswa okusebenzayo kunye noBulumko boFakelo

Nditsho neyona gasket igqwesileyo iyasilela ukuba ifakwe ngokungalunganga. I-NBR inoxinzelelo oluhle, kodwa ayixoleli ngokupheleleyo. Umphezulu weflange ubalulekile. Irhabaxa kakhulu, kwaye iya kunqumla kwizinto eziphantsi komthwalo webholithi. Igudile kakhulu (njengesiphelo sesipili), kwaye isenokungabi nokuluma okwaneleyo ukumelana nokukhasa. Isiphelo serrated okanye i-60-90 microinch Ra idla ngokuba yindawo emnandi.

Itorque yebholt kunye nolandelelwano lubalulekile. Udinga noxinzelelo ukuze ujikeleze imathiriyeli ye-gasket kancinci kwiimpazamo zeflange. Ukuyityumza kakhulu, kwaye uya kukhupha irabha okanye ubangele uxinzelelo oluphezulu kangangokuba lukhawulezise ukuguga. Ngaphantsi kwe-torque, kwaye iya kuvuza. Hlala ulandela i-OEM torque specs ukuba ikhona. Ukuba akunjalo, umgaqo jikelele womgangatho irabha ye-nitrile gasket kwiflange yentsimbi kukuya kuluhlu oluphakathi lobungakanani bebholithi kunye nebakala, emva koko ujonge kwakhona emva komjikelo wobushushu.

Ugcino yenye into elula abantu bamosha. Musa ukushiya i-NBR gaskets kwibhokisi yesixhobo eshushu elangeni elithe ngqo, okanye ifunjwe phantsi kweentsimbi ezinzima. Baza kuthatha isethi, bafumane ukuqhekeka kwe-ozone, okanye ukonakala. Zigcine kwipakethe yazo yokuqala, kwindawo epholileyo, emnyama, neyomileyo. Izinto ezisisiseko, kodwa uya kumangaliswa.

Ujongwa nini kwenye indawo: Iindlela ezizezinye

Ke uyilahla nini i-NBR? Sele ndikhankanye kuyo: ukushisa okuphezulu okuqhubekayo (ngaphezu kwe-120 ° C), ukubonakaliswa kwe-ozone / imozulu, kunye neekhemikhali ezinobundlobongela ngaphandle kwentsapho ye-hydrocarbon. Ezinye iindlela zokuya kuzo zibe:

Isigqibo sihlala sihla kulwelo oluthile, ubushushu, uxinzelelo, kunye neendleko. Ayikho i-gasket engcono kunazo zonke. Kwinxalenye enkulu yezicelo eziqhelekileyo zemizi-mveliso kunye neemoto ezibandakanya ulwelo olusekwe kwipetroleum kumaqondo obushushu aphakathi, iigaskets zerabha ye-nitrile hlala ungagqibekanga, ukhetho lwepragmatic. Ukusetyenziswa kwabo ngcono kwezona ndawo zininzi, ezingathandekiyo apho ukuthembeka kunye nokusebenza kakuhle kweendleko kubaluleke ngaphezu kokusebenza okungaqhelekanga. Kufuneka nje uyazi imida, kwaye uyihloniphe.