Le hoja rabara ea nitrile butadiene (NBR) esale e le eona ntho e ka sehloohong ea tiiso ea turbine ea moea ka lilemo tse mashome, tsoelo-pele ea ho etsoa ha tiiso ea polyurethane, ho sebetsa le ho qapa e senya boemo ba NBR indastering ka potlako.Hoa etsahala hore thepa ea bohlokoa ka ho fetisisa e kenyelletsa ho hanyetsa ho roala, ho lumellana ha metsi, ho hanyetsa ozone, matla a mochine, le bokhoni ba ho boloka thepa ena kaofela ka mocheso o tlaase.
Polyurethane e se e le thepa e loketseng ho tiisa li-bearing/jenereithara tse ka sehloohong, li-bearings tsa longitudinal le tse hlabang.Leha ho le joalo, ho nkela thepa sebakeng se seng se le teng hangata ha hoa lekana.Litiiso li tlameha ho etsoa ka polyurethane kelellong.
Mokhoa o mong oa ho lekola ho hanyetsa ha polyurethanes ke ka tlhahlobo e tloaelehileng ea moropa e kang ASTM D5963.Mokhoa ona o atisa ho sebelisoa ho hlahloba rabara, empa o sebetsa le ho polyurethane, haholo-holo ha ho bapisoa le litekanyetso tsa ho apara.Ka tlase ho na le litekanyetso tsa index ea lisebelisoa tse fapaneng tse lekiloeng ke System Seals ho Cleveland.Hlokomela hore NBR le HNBR li na le ARI e ka bang 1.5, ha polyurethanes e na le ARI ea 4 ho ea ho 8. Ena ke ntlafatso ea makhetlo a tšeletseng.
Polyurethane e boloka boleng ba eona ba ARI ha nako e ntse e feta le kamora ho pepesetsoa maro a fapaneng, haholo maro a thehiloeng ho oli.Tsela e 'ngoe ea ho tseba sena ke ho tsofala ASTM D5963 ho roala lisampole ka maro a 100°C ka matsatsi a 90 (80°C bakeng sa maro a thehiloeng metsing) le ho pheta tlhahlobo matsatsi a mang le a mang a 30.Ka tlase ke liphetho tse tloaelehileng, empa netefatso e khothaletsoa bakeng sa mokelikeli o mong le o mong.
Setšoantšo sa 3. Ho boloka ARI ho NBR le polyurethane e thibelang hydrolysis ka mor'a ho tsofala ka oli ea distilled mineral ka 100 ° C.
Le hoja litlhaloso li bontša ho lumellana le maro a phethiloeng, tlhahlobo ea botsofali e potlakileng (kapa lilemo tsa tšebeletso) e lokela ho fumana ts'ebetso ea nako e telele le botsitso ba lisebelisoa tse pepesehileng marong a itseng.Liteko tsa System Seals li etsa liteko tsa ho lumellana ha mokelikeli bakeng sa matsatsi a 90 ho fapana le tlhahlobo e tloaelehileng ea lihora tse 168 hobane System Seals e lula e bona liphetoho tse kholo mekhoeng ea bohlokoa ka mor'a lihora tse 168 tsa ho pepeseha ha mokelikeli.
Polyurethane e ikhethileng e bonts'a khanyetso ea mokelikeli e ntlafalitsoeng ha e bapisoa le NBR ka har'a mafura a tloaelehileng indastering ea matla a moea.Ka tlase ke tafole e lumellanang bakeng sa lisebelisoa tsena tse tsebahalang.
NBR e tsejoa e le kotsing ea ozonolysis, e leng ha limolek'hule tsa ozone li senya likamano tsa lik'hemik'hale ho NBR e sa tsitsang.Ho phatloha ha Ozone ho tloaelehile ha rabara ea nitrile butadiene (NBR) e kentsoe le ho senyeha ho honyenyane.Tharollo e 'ngoe ke ho kenya boka ho NBR, ho theha thibelo e khahlanong le ozone e sireletsang NBR.Ka bomalimabe, boka ha bo fetole tlamo ea lik'hemik'hale ea NBR.Haeba NBR e pepesehetse maemo a tikoloho a tlosa boka, e ka boela ea senyeha hape.Li-polyurethane tse ling tse khethehileng tse sebelisoang litiisong tsa matla a moea ka tlhaho li hanana le ozone.
The elastic modulus, matla le bolelele ba polyurethane li phahame ka makhetlo a mabeli ho isa ho a mararo ho feta NBR e ngata.Ka lebaka leo, litiiso tsa polyurethane li khona ho mamella ho senyeha ho hoholo ha mochini le ho mamella meroalo e phahameng ea mochini.
NBR e tloaelehileng e na le modulus ea elastic ea 10-15 MPa le matla a tsitsitseng a 20 MPa.Li-polyurethanes tse ngata li na le modulus ea elastic ea 45-60 MPa le matla a matla a 50-60 MPa.Sena se bolela hore thepa ha e thata ho feta NBR, e bolelang ho boloka sebopeho se betere le ho hanyetsa ho hoholo ha meroalo ea khatello.
Li-turbine tsa moea, mocheso o phahameng hangata ha se bothata.Leha ho le joalo, ho itšetlehile ka sebaka le bophahamo, mocheso o fokolang oa -40 ° C ha o tloaelehe.NBR e tloaelehileng e na le bonyane mocheso oa ho sebetsa oa -20 ° C, 'me tlhahlobo ea mechine e matla e bontšitse hore matla a moea a polyurethanes a mangata ha a amehe ke mocheso ho fihlela ho -40°C.
Polyurethane ke khetho ea tlhaho bakeng sa litiiso tsa matla a moea ka lebaka la thepa ea eona e phahameng ea mochini, khanyetso e ntle ea ozone, litheko tse tlase tsa ho roala le mocheso o tlase oa ts'ebetso.Ka tlase ke malapa a mabeli a likopo tseo polyurethane e loketseng hantle bakeng sa tsona.Setšoantšo se ka letsohong le letšehali se bonts'a deformation e etsisitsoeng le litšoaneleho tsa ho ikopanya tsa tiiso e nang le polyurethane.Setšoantšo se ka ho le letona se bonts'a System Seals swirl seal, e leng tiiso e kholo e lulang e pompa lubricant ho khutlela ka letamong ha bering e ntse e potoloha.
Haeba u ka rata ho kenya letsoho ho Windpower, ka kopo ikopanye le rona: https://www.bdseals.com or www.bodiseals.com.NINGBO BODI SEALS CO., LTD e hlahisa mefuta eohle ea tiiso ea rabara ea boleng bo holimo, li-rings ,Li-gaskets .
Nako ea poso: Dec-24-2023