Ko da yake nitrile butadiene roba (NBR) ya kasance mafi rinjaye iska injin hatimin hatimi shekaru da yawa, ci gaban polyurethane hatimi tsari, sarrafawa da kuma zane suna da sauri gusar da matsayin NBR a cikin masana'antu.Ya bayyana cewa mafi yawan kaddarorin masu amfani sun haɗa da juriya na lalacewa, daidaitawar ruwa, juriya na ozone, ƙarfin injina, da ikon kula da duk waɗannan kaddarorin a ƙananan yanayin zafi.
Polyurethane ya zama kayan aiki mai mahimmanci don rufe manyan bearings / janareta, tsayin tsayi da masu juyawa.Koyaya, kawai maye gurbin kayan a cikin tsarin da ake da shi sau da yawa bai isa ba.Dole ne a tsara hatimi tare da polyurethane a hankali.
Hanya ɗaya don kimanta juriyar lalacewa na polyurethane ita ce ta daidaitaccen gwajin lalacewa na drum kamar ASTM D5963.Yawancin lokaci ana amfani da wannan hanyar don kimanta roba, amma kuma ta shafi polyurethane, musamman idan aka kwatanta ƙimar lalacewa.A ƙasa akwai ƙimar ƙimar sawa don kayan daban-daban da aka gwada ta System Seals a Cleveland.Lura cewa NBR da HNBR suna da ARI na kusan 1.5, yayin da polyurethane suna da ARI na 4 zuwa 8. Wannan haɓakawa har zuwa sau shida.
Polyurethane yana kula da ƙimar ARI na tsawon lokaci da kuma bayan fallasa ga ruwa daban-daban, musamman ruwan tushen mai.Hanya ɗaya don tantance wannan ita ce tsufa ASTM D5963 sa samfura a cikin ruwa a 100°C na tsawon kwanaki 90 (80°C don ruwan ruwa) sannan a maimaita gwajin kowane kwana 30.A ƙasa akwai sakamako na yau da kullun, amma ana ba da shawarar tabbatarwa ga kowane ruwa.
Hoto 3. Rikewar ARI a cikin NBR da polyurethane mai tsayayyar hydrolysis bayan tsufa a cikin man ma'adinai mai distilled a 100 ° C.
Kodayake ƙayyadaddun bayanai suna nuna dacewa tare da ƙãrewar ruwa, haɓaka gwajin tsufa (ko shekarun sabis) yakamata ya ƙayyade aikin dogon lokaci da kwanciyar hankali na kayan da aka fallasa ga takamaiman ruwaye.Seals Seals yana gwada dacewa da ruwa na kwanaki 90 maimakon daidaitaccen gwajin sa'o'i 168 saboda Seals Seals akai-akai yana gano manyan canje-canje a cikin mahimman kayan kayan bayan awanni 168 na bayyanar ruwa.
Polyurethane na musamman yana nuna ingantaccen juriya na ruwa idan aka kwatanta da NBR a cikin mafi yawan man shafawa a cikin masana'antar makamashin iska.A ƙasa akwai teburin daidaitawa don waɗannan shahararrun man shafawa.
An san NBR yana da saurin kamuwa da ozonolysis, wanda shine lokacin da kwayoyin ozone suka karya haɗin sinadarai a cikin NBR mara kyau.Fashewar Ozone na zama ruwan dare yayin da ake yin robar nitrile butadiene (NBR) ko da ƴan nakasassu ne.Ɗaya daga cikin mafita ita ce allurar kakin zuma a cikin NBR, ƙirƙirar shingen anti-ozone wanda ke kare NBR.Abin takaici, kakin zuma baya canza haɗin sinadarai na NBR.Idan NBR ta fallasa ga yanayin muhalli wanda ke cire kakin zuma, zai sake zama mai saurin lalacewa.Wasu ƙwararrun polyurethane da ake amfani da su a cikin hatimin makamashin iska suna da juriya ta dabi'a.
Modules na roba, ƙarfi da elongation na polyurethane sun ninka sau biyu zuwa uku fiye da yawancin NBR.A sakamakon haka, hatimin polyurethane suna iya jure wa manyan nakasassun injiniyoyi kuma suna jure wa manyan kayan aikin injiniya.
NBR na yau da kullun yana da modules na roba na 10-15 MPa da ƙarfin juzu'i na 20 MPa.Yawancin polyurethane suna da modules na roba na 45-60 MPa da ƙarfin juzu'i na 50-60 MPa.Wannan yana nufin cewa kayan yana da ƙasa da wuya fiye da NBR, wanda ke nufin mafi kyawun riƙewar siffar da girman juriya ga nauyin matsa lamba.
A cikin injin turbin iska, yanayin zafi yawanci ba shi da matsala.Koyaya, dangane da wuri da tsayi, mafi ƙarancin yanayin zafi na -40 ° C ba sabon abu bane.Standard NBR yana da mafi ƙarancin zafin aiki na -20 ° C, kuma bincike mai ƙarfi na injiniya ya nuna cewa yawancin ƙarfin iska polyurethanes ba su da tasiri ta yanayin zafi zuwa -40 ° C.
Polyurethane zaɓi ne na halitta don hatimin ikon iska saboda ingantattun kayan aikin injiniyansa, mafi kyawun juriya na ozone, ƙarancin lalacewa da ƙarancin yanayin aiki.A ƙasa akwai iyalai biyu na aikace-aikacen da polyurethane ya dace da su.Hoton da ke gefen hagu yana nuna nakasar da aka kwaikwayi da halayen hulɗa na hatimin ɗaukar hoto na polyurethane.Hoton da ke hannun dama yana nuna hatimin Sistem Seals swirl hatimin, hatimin babban hatimin da ke ci gaba da fitar da mai a cikin tafki yayin da abin da ke jujjuyawa.
Idan kuna son ba da gudummawa ga Windpower, da fatan za a tuntuɓe mu: https://www.bdseals.com ko www.bodiseals.com.NINGBO BODI SEALS CO., LTD yana samar da kowane nau'in hatimin roba mai inganci daban-daban,orings ,Gasket .
Lokacin aikawa: Dec-24-2023