Izimpawu zerabha ze-polyurethane, ezenziwe ngezinto zerabha ze-polyurethane, ziyizingxenye ezibalulekile ezinhlobonhlobo zezicelo zezimboni. Lezi zivalo ziza ngezindlela ezahlukene, kufaka phakathi ama-O-rings, ama-V-rings, ama-U-rings, ama-Y-rings, izivalo eziyisikwele, izivalo ezimise okwezifiso, kanye nama-sealing washers.
Irabha ye-polyurethane, i-polymer yokwenziwa, ihlanganisa igebe phakathi kwerabha yemvelo nepulasitiki evamile. Isetshenziswa kakhulu ekucubungulweni kokucindezela kweshidi lensimbi, irabha ye-polyurethane okukhulunywa ngayo ngokuyinhloko iwuhlobo lwe-polyester casting. Yenziwe nge-adipic acid kanye ne-ethylene glycol, okuholela ku-polymer enesisindo sama-molecule esingaba ngu-2000. Le polymer isabela futhi ekwakheni i-prepolymer enamaqembu okuphela kwe-isocyanate. I-prepolymer ixutshwa ne-MOCA (4,4′-methylenebis(2-chloroaniline)) bese iphonswa ezikhunjini, kulandelwe yi-vulcanization yesibili ukukhiqiza imikhiqizo yerabha ye-polyurethane enamazinga obulukhuni ahlukahlukene.
Ubulukhuni bezimbozo zerabha ze-polyurethane bungalungiswa ukuze kuhlangatshezwane nezidingo ezithile zokucubungula insimbi, kusukela ku-20A kuya ku-90A esikalini sobulukhuni be-Shore.
Izici Eziyinhloko Zokusebenza:
- Ukumelana Nokugqokwa Okumangalisayo: Irabha ye-polyurethane ikhombisa ukumelana nokugqokwa okuphezulu kakhulu kuzo zonke izinhlobo zerabha. Ukuhlolwa kwelabhorethri kubonisa ukuthi ukumelana kwayo nokugqokwa kuphindwe kathathu kuya kahlanu kunokwerabha yemvelo, kanti izinhlelo zokusebenza zangempela zivame ukubonakala ziqine izikhathi eziyishumi.
- Amandla Aphezulu Nokunwebeka: Ngaphakathi kobubanzi bobulukhuni be-Shore A60 kuya ku-A70, irabha ye-polyurethane ibonisa amandla aphezulu nokwenwebeka okuhle kakhulu.
- Ukumunca Okuphezulu Kokuthungela Nokushaqeka: Ezingeni lokushisa legumbi, izingxenye zerabha ze-polyurethane zingamunca u-10% kuya ku-20% wamandla okudlidliza, kanye namazinga aphezulu okumunca lapho kukhuphuka amaza okudlidliza.
- Ukumelana Okuhle Kakhulu Kwamafutha Namakhemikhali: Irabha ye-polyurethane ibonisa ukusondela okuncane kwamafutha amaminerali angewona awe-polar futhi ayithinteki kakhulu ngamafutha (njenge-kerosene nophethiloli) kanye namafutha omshini (njengamafutha e-hydraulic kanye nokugcoba), isebenza kangcono kunerabha ezisetshenziswa kabanzi futhi incintisana nerabha ye-nitrile. Kodwa-ke, ikhombisa ukuvuvukala okukhulu kuma-alcohols, ama-ester, nama-hydrocarbon anuka kamnandi.
- I-High Friction Coefficient: Ngokuvamile ingaphezu kuka-0.5.
- Izakhiwo Ezengeziwe: Ukumelana okuhle nokushisa okuphansi, ukumelana ne-ozone, ukumelana nemisebe, ukufudumala kukagesi, kanye nezakhiwo zokunamathela.
Izicelo:
Ngenxa yezakhiwo zayo ezisezingeni eliphezulu zomzimba nezemishini, irabha ye-polyurethane ivame ukusetshenziswa ezinhlelweni zokusebenza okuphezulu, okuhlanganisa imikhiqizo engagugi, izinto eziqinile ezingamelani namafutha, kanye nezingxenye eziqinile nezine-modulus ephezulu. Isetshenziswa kakhulu emikhakheni eyahlukahlukene:
- Imishini Nezimoto: Ukukhiqiza izakhi ze-buffer zamabhuleki ezisebenza ngesivinini esiphezulu, izingxenye zerabha ezilwa nokudlidliza, iziphethu zerabha, ama-coupling, kanye nezingxenye zemishini yendwangu.
- Imikhiqizo Engamelani Namafutha: Ukukhiqiza ama-roller okunyathelisa, izivalo, izitsha zikaphethiloli, kanye nezivalo zikaphethiloli.
- Izindawo Zokungqubuzana Okunzima: Kusetshenziswa kumapayipi okuhambisa, izintambo zemishini yokugaya, izikrini, izihlungi, amathe ezicathulo, amasondo okushayela okungqubuzana, ama-bushing, ama-brake pad, kanye namathayi ebhayisikili.
- Ukucindezela Nokugoba Ngokubandayo: Kusebenza njengento yokwakha izinqubo ezintsha zokucindezela nokugoba ngokubandayo, okuthatha indawo yezinhlayiya zensimbi ezidla isikhathi futhi ezibizayo.
- Irabha ye-Foam: Ngokusebenzisa ukusabela kwamaqembu e-isocyanate ngamanzi ukuze kukhishwe i-CO2, irabha ye-foam elula enezakhiwo ezinhle kakhulu zemishini ingakhiqizwa, ilungele ukuvikela ukushisa, ukuvikela umsindo, kanye nezinhlelo zokusebenza zokulwa nokudlidliza.
- Izicelo Zezokwelapha: Zisetshenziswa ezingxenyeni zerabha ezisebenzayo, emithanjeni yegazi yokwenziwa, esikhumbeni sokwenziwa, emapayipini okufakwa, ezintweni zokulungisa, kanye nasezisetshenzisweni zamazinyo.
Isikhathi sokuthunyelwe: Septhemba 17-2025