Kunyangwe nitrile butadiene rubber (NBR) yanga iri iyo inotungamira turbine seal material kwemakumi emakore, kufambira mberi mukuumbwa kwepolyurethane chisimbiso, kugadzirisa uye dhizaini kuri kukurumidza kukanganisa chinzvimbo cheNBR muindastiri.Zvinoitika kuti izvo zvakanyanya kubatsira zvivakwa zvinosanganisira kupfeka kuramba, kuenderana kwemvura, ozone kuramba, simba remagetsi, uye kugona kuchengetedza zvese izvi zvivakwa pakudziya kwakaderera.
Polyurethane yave chinhu chakanakira kuvhara mabearings / majenareta, longitudinal uye transverse mabearings.Nekudaro, kungotsiva zvinhu muchimiro chiripo kazhinji hakuna kukwana.Zvisimbiso zvinofanirwa kugadzirwa zvine polyurethane mupfungwa.
Imwe nzira yekuongorora kupfeka kuramba kwe polyurethanes ndeye yakamisikidzwa dhiramu kupfeka bvunzo seASTM D5963.Iyi nzira inowanzo shandiswa kuongorora rabha, asi inoshandawo kune polyurethane, kunyanya kana uchienzanisa mareti ekupfeka.Pazasi pane kupfeka index kukosha kwezvinhu zvakasiyana zvakaedzwa neSystem Seals muCleveland.Cherechedza kuti NBR neHNBR dzine ARI inenge 1.5, nepo polyurethanes ine ARI ye4 kusvika ku8. Uku ndiko kunatsiridza kusvika katanhatu.
Polyurethane inochengetedza kukosha kwayo kweARI nekufamba kwenguva uye mushure mekuratidzwa kune dzakasiyana siyana mvura, kunyanya mafuta-based fluid.Imwe nzira yekuona izvi ndeyezera ASTM D5963 kupfeka samples mumvura pa100 ° C kwemazuva makumi mapfumbamwe (80 ° C yemvura-based fluid) uye kudzokorora bvunzo mazuva makumi matatu ega ega.Pazasi pane zvakajairika mhedzisiro, asi kusimbiswa kunokurudzirwa kune yega yega mvura.
Mufananidzo 3. Kuchengetwa kweARI muNBR uye hydrolysis-resistant polyurethane mushure mekukwegura mu distilled mineral oil pa 100 ° C.
Kunyangwe zvimiro zvichiratidza kuenderana nemvura dzakapedzwa, kukurumidza kuyedza kuchembera (kana makore ebasa) inofanirwa kuona kushanda kwenguva refu uye kugadzikana kwezvinhu zvakafumurwa kune chaiwo mvura.System Seals inoyedza kuenderana kwemvura kwemazuva makumi mapfumbamwe kwete yakajairwa 168 awa bvunzo nekuti maSystem Seals anogara achiona shanduko dzakakosha muzvinhu zvakakosha zvezvinhu mushure memaawa zana nemakumi matanhatu nesere ekuratidzwa kwemvura.
Yakagadziridzwa polyurethane inoratidza yakagadziridzwa mvura inodzivirira kana ichienzaniswa neNBR mune anonyanya kudzora muindasitiri yesimba remhepo.Pazasi pane tafura yekuenderana kune aya akakurumbira lubricant.
NBR inozivikanwa kuve inotapukirwa neozonolysis, inova apo ozone mamorekuru anotyora kemikari zvisungo mune unsaturated NBR.Kutsemuka kweozoni kunowanzoitika kana nitrile butadiene rubber (NBR) ikaiswa pasi pedeformation.Imwe mhinduro ndeyekuisa wakisi muNBR, kugadzira chinodzivirira ozone chinodzivirira NBR.Nehurombo, wakisi haichinji kemikari bond yeNBR.Kana NBR ikasangana nemamiriro ekunze anobvisa wakisi, inotapukirwa nekudzikira zvakare.Mamwe akasarudzika polyurethanes anoshandiswa mumhepo zvisimbiso zvesimba zvinogara zvisingaite ozone.
Iyo elastic modulus, simba uye kurebesa kwepolyurethane zvakapetwa kaviri kusvika katatu kupfuura yakawanda NBR.Nekuda kweizvozvo, zvisimbiso zve polyurethane zvinokwanisa kumirisana nekukanganisika kukuru kwemuchina uye kutsungirira mitoro yepamusoro.
Iyo yakajairwa NBR ine elastic modulus ye10-15 MPa uye inorema simba makumi maviri MPa.Mazhinji polyurethanes ane elastic modulus ye 45-60 MPa uye simba rekusimba re50-60 MPa.Izvi zvinoreva kuti zvinhu zvacho hazvina kuoma kupfuura NBR, zvinoreva kuti zvirinani kuchengetedza chimiro uye kuramba kwakanyanya kune zvinorema.
Mumagetsi emhepo, tembiricha yakakwirira kazhinji haisi dambudziko.Nekudaro, zvichienderana nenzvimbo uye urefu, tembiricha shoma ye -40 ° C haina kujairika.Standard NBR ine tembiricha yekushanda inosvika -20°C, uye dynamic mechanical analysis yakaratidza kuti many wind energy polyurethanes haabatwe netembiricha inodzika kusvika -40°C.
Polyurethane isarudzo yechisikigo yezvisimbiso zvesimba remhepo nekuda kwehukuru hwayo hwemakina, kuramba kwe ozone, kuderera kwekupfeka uye kuderera kwekushisa kwekushanda.Pazasi pane mhuri mbiri dzezvikumbiro izvo polyurethane inokodzera.Mufananidzo uri kuruboshwe unoratidza kutevedzera deformation uye kubata hunhu hwe polyurethane inotakura chisimbiso.Mufananidzo uri kurudyi unoratidza System Seals swirl chisimbiso, chikuru chine chisimbiso chinoramba chichipomba lubricant ichidzokera mudziva sezvo bhegi rinotenderera.
Kana iwe uchida kugovera kuWindpower, tapota taura nesu: https://www.bdseals.com kana www.bodiseals.com.NINGBO BODI SEALS CO., LTD inogadzira marudzi ese akasiyana emhando yepamusoro rabha chisimbiso,oringi ,Gaskets .
Nguva yekutumira: Zvita-24-2023