Momwe mungagwiritsire ntchito ma gaskets a rabara a nitrile? 

Chifukwa chake, mukudabwa Zoonadi, anthu ambiri amangoganiza kuti mafuta osagwira ntchito ndikuyimirira pamenepo. Ichi ndi chiyambi cholimba, koma chimaphonya nuance. M'zochita zake, mtengo weniweni wa NBR uli pamlingo wake - kupanikizika kwabwino, kukana kwabwino kwa abrasion, komanso kukana kodalirika kwa mafuta, mafuta, ndi mankhwala ambiri, zonse pamtengo womwe suphwanya banki. Ndi kavalo wantchito, osati poni yowonetsera. Chinyengo ndicho kudziwa komwe kukhazikikako kumagwira ntchito komanso komwe kumayambira kugwa.

Kumene NBR Imawaladi: Malo Okoma

Kwa ine, ntchito yapamwamba, yopanda-brainer ili m'makina amafuta amagalimoto. Tikukamba ma modules a pampu yamafuta, kutumiza zisindikizo za unit, carburetor gaskets (pa injini zakale, ndithudi), ndi O-mphete zosiyanasiyana mu mizere. Chinsinsi apa ndikuwonetseredwa kosalekeza mafuta ndi dizilo, nthawi zambiri ndi zowonjezera mafuta amakono. Gulu lokhazikika la NBR, tinene lomwe lili ndi medium acrylonitrile (ACN), limagwira izi mokongola. Ndawawona akukhala kwa zaka zambiri m'malo awa momwe kutentha sikumapitirira 100 ° C. Ndizodziwikiratu.

Ndiye pali ma hydraulics ambiri amakampani. Osati machitidwe apamwamba, osagwira moto a phosphate ester - ndicho chilombo chosiyana - koma makina anu okhazikika amafuta opangira ma hydraulic pamakina. Ma gaskets pamavuvu a valve, zosungira madzimadzi, ndi mapaipi otsika kwambiri. Amakhala oponderezedwa nthawi zonse ndipo amasambitsidwa ndi mafuta. Gasket yopangidwa bwino ya NBR apa imapereka chisindikizo chodalirika, chanthawi yayitali. Njira yolephereka nthawi zambiri imakhala yolimba pang'onopang'ono kwa zaka zambiri, osati kuphulika kwadzidzidzi, zomwe ndizomwe mukufuna kukonza kukonza.

Malo ena amene nthawi zambiri amanyalanyazidwa ndi zida zotsuka pokonza chakudya. Tsopano, ndimveni—NBR siikhala ya chakudya pokhapokha ngati itaphatikizidwa ndikutsimikiziridwa. Koma kwa zisindikizo zakunja pamapampu, ma gaskets pazida zomwe zimathiridwa ndi madzi otentha, zotsukira caustic, ndi zotsukira pang'ono, ndiye ngwazi yotsika mtengo. Imatsutsa kutupa ndi kuwonongeka komwe kungaphe gasket ya EPDM mu supu yamankhwala. Muyenera kutsimikiza kuti sizikukhudzana mwachindunji ndi mayendedwe azinthu.

Malire ndi Pafupifupi Zochitika

Apa ndi pamene zochitika zimakuwonongerani ndalama, nthawi zambiri popewa kulakwitsa. Vuto lalikulu kwambiri ndi kutentha. Malire apamwamba a NBR nthawi zambiri amavomerezedwa ngati 100-120 ° C mosalekeza. Ikankhireni ku 135 ° C, ndipo chiyembekezo cha moyo chimatsika. Ndinaphunzira izi movutikira pamzere wotulutsa kompresa. Zolembazo zidati sizingagwirizane ndi mafuta, chifukwa chake tidagwiritsa ntchito NBR. Zinagwira ntchito… kwa miyezi isanu ndi umodzi isanaphike muvumbi losweka. Kutentha kwapang'onopang'ono komwe kumatuluka kunali kokulirakulira kupitirira malire ake. Ntchitoyi inkafunika gasket ya FKM (Viton). NBR ndi ya kutentha pang'ono.

Ozone ndi nyengo ndi malo ena ofooka. Ngati gasket idzawonetsedwa ndi kuwala kwa dzuwa ndi mpweya wakunja, makamaka pafupi ndi zida zamagetsi zomwe zimatha kupanga ozone, NBR idzasweka. Sizinthu zakunja. Ndaziwona zikuchitika pazitsulo zakunja zama hydraulic pazida zam'manja zomwe zidakhala nthawi yayitali. Chisindikizocho chinkawoneka bwino mpaka mutachigwira ndipo chinang'ambika. Pazifukwa izi, mwabwerera ku EPDM kapena gulu lokhazikika mwapadera.

Ndiye pali kuyanjana kwamankhwala kuposa ma hydrocarbon. Ma Ketoni, esters, ma acid amphamvu, brake fluid (DOT 3, 4, 5.1) - izi zidzaukira NBR yokhazikika. Pali lingaliro lolakwika lodziwika kuti kukana mafuta kumatanthauza kugonjetsedwa ndi mankhwala. Sizikutero. Nthawi zonse, fufuzani tchati chofananira chamadzimadzi enieni. Wopereka zinthu zozama komanso chidziwitso chaukadaulo ndiwofunikira apa. Mwachitsanzo, kampani ngati Malingaliro a kampani Handan Zitai Fastener Manufacturing Co., Ltd., yomwe imagwira ntchito kuchokera ku gawo lalikulu kwambiri la China ku Yongnian, nthawi zambiri imakhala ndi magiredi angapo. Ngakhale kuti amadziwika ndi zomangira, ambiri opanga ophatikizana otere amaperekanso kapena amatha kulangiza pazigawo zoyenera zosindikizira pamsonkhanowo, kumvetsetsa kuti bolt ndi gasket ziyenera kugwira ntchito ngati dongosolo. Malo omwe ali pafupi ndi mayendedwe akuluakulu monga Beijing-Guangzhou Railway amatanthauza kuti nthawi zambiri amayang'ana kapena kupereka zida zamitundu yambiri yamafakitale, kotero amawona zomwe zimagwira ntchito ndi zomwe zimalephera m'munda.

Maphunziro a Zakuthupi ndi Mdyerekezi Mwatsatanetsatane

Sikuti NBR yonse idapangidwa mofanana. Zomwe zili mu acrylonitrile ndiye lever yayikulu. High ACN imapereka kukana kwamafuta / mafuta abwinoko koma pamtengo wa kusinthasintha kocheperako. Kwa gasket ku Northern European hydraulic system yomwe imawona -20 ° C, high-ACN NBR ikhoza kukhala yolimba kwambiri kuti isindikize bwino poyambitsa. Mufunika kuphatikizika kwa ACN kochepa. Ndi kusinthanitsa.

Ndiye pali kuphatikiza-zodzaza, zopangira mapulasitiki, ndi makina ochiritsa. Gasket ya chisindikizo champhamvu (monga shaft chisindikizo) imafunikira kukana kwa ma abrasion ndi ma compression set properties kusiyana ndi static flange gasket. Wopereka wabwino amafunsa za kugwiritsa ntchito: static kapena dynamic? Kutentha kosalekeza? Media zamadzimadzi? Kupanikizika? Mayankho amatengera pawiri. Gasket yotsika mtengo, yodziwika bwino ya NBR imatha kusindikiza poyambira koma ilephera msanga chifukwa sinapangidwe kuti ivutike.

Ndikukumbukira pulojekiti yokhudzana ndi kusindikiza makina osakaniza a biodiesel. Standard NBR inali kulephera mwachangu. Nkhaniyi sinali mafuta oyambira, koma kuchuluka kwa ma esters komanso kuthekera kowonjezera zowonjezera mwaukali pakuphatikiza. Tinasinthira ku gasket ya hydrogenated nitrile (HNBR), yomwe imakhala ndi mphamvu yabwino kwambiri yolimbana ndi mankhwala komanso kutentha, ndipo vutoli lidatha. Phunziro linali loyang'ana kupyola pa dzina lamadzimadzi la generic kupita ku mawonekedwe ake enieni, amakono.

Kugwiritsa Ntchito ndi Kuyika Nzeru

Ngakhale gasket yabwino kwambiri imalephera ngati idayikidwa molakwika. NBR ili ndi kupsinjika kwabwino, koma sikukhululuka kopanda malire. Kumaliza kwa flange kumafunika. Zaukali kwambiri, ndipo zimadula muzinthu zomwe zili pansi pa bawuti. Yosalala kwambiri (monga galasi lomaliza), ndipo ikhoza kukhala yopanda kuluma kokwanira kukana zokwawa. Mapeto a serrated kapena 60-90 microinch Ra nthawi zambiri amakhala malo okoma.

Torque ya bolt ndi kutsatizana ndizofunikira. Mufunika ngakhale kupanikizana kuti muyendetse zinthu za gasket pang'ono mu zolakwika za flange. Iphwanyeni kwambiri, ndipo mutulutsa mphira kapena kuyambitsa kupsinjika kwakukulu kotero kuti imathandizira kukalamba. Pansi-torque, ndipo idzatuluka. Nthawi zonse tsatirani ma torque a OEM ngati alipo. Ngati sichoncho, lamulo lalikulu la muyezo nitrile rubber gasket pa chitsulo flange ndi torque kwa m'ma osiyanasiyana kukula bawuti ndi kalasi, ndiye kachiwiri fufuzani pambuyo mkombero kutentha.

Kusungirako ndi chinthu china chosavuta chomwe anthu amasokoneza. Osasiya ma gaskets a NBR m'bokosi lazida zotentha padzuwa, kapena ataunjikidwa pansi pazitsulo zolemera. Iwo atenga seti, atenge ming'alu ya ozone, kapena kuwonongeka. Zisungeni m'matumba awo oyamba, pamalo ozizira, amdima, owuma. Zinthu zoyambira, koma mungadabwe.

Nthawi Yoyang'ana Kwina: Njira Zina

Ndiye mumasiya liti NBR? Ndanenapo kale: kutentha kosalekeza (pamwamba pa 120 ° C), kukhudzana ndi ozoni / nyengo, ndi mankhwala owopsa kunja kwa banja la hydrocarbon. Njira zina zomwe mungapite nazo zimakhala:

Chisankhocho nthawi zonse chimachokera kumadzi enieni, kutentha, kuthamanga, ndi mtengo wake. Palibe gasket yabwino kwambiri padziko lonse lapansi. Kwa gawo lalikulu lazinthu zomwe zimagwiritsidwa ntchito m'mafakitale ndi magalimoto okhudzana ndi zamadzimadzi zochokera ku petroleum pa kutentha kocheperako, mphira wa nitrile gaskets khalanibe okhazikika, chisankho cha pragmatic. Kugwiritsa ntchito kwawo bwino kumakhala m'malo osawerengeka, osasangalatsa komwe kudalirika komanso kutsika mtengo ndikofunikira kwambiri kuposa kuchita kwachilendo. Muyenera kudziwa malire, ndi kuwalemekeza.