Feem ntau, cov ntaub ntawv sib txhuam txhuam tawm tsam ntau yam hlau. Nws feem ntau ntseeg tias nyob rau hauv kev sib txhuam, cov khoom siv nrog kev sib txhuam coefficient ntau dua 0.2 yog hu ua cov ntaub ntawv sib txhuam.
1. Raws li nws cov yam ntxwv ntawm kev sib txhuam, cov khoom siv tau muab faib ua cov khoom siv sib txhuam qis thiab cov khoom sib txhuam coefficient siab. Tsawg coefficient ntawm kev sib txhuam cov ntaub ntawv, tseem hu ua kev sib txhuam cov ntaub ntawv los yog lubricating cov ntaub ntawv, yog siv los txo lub zog poob nyob rau hauv txhua yam motion, txo hnav ntawm mechanical Cheebtsam thiab ntev kev pab cuam lub neej. Cov khoom uas muaj coefficient siab ntawm kev sib txhuam tseem hu ua cov ntaub ntawv sib txhuam (hu ua cov ntaub ntawv sib txhuam).
Raws li kev ua haujlwm, nws tuaj yeem muab faib ua ob pawg tseem ceeb ntawm cov khoom sib txhuam: kis tau tus mob thiab nres. Piv txwv li, lub clutch daim hlau kis tau tus mob lub zog tsim los ntawm lub cav mus rau lub log tsav los ntawm kev sib dhos thiab disengagement ntawm lub clutch kev sib txhuam nto nyob rau hauv lub clutch los ua ke, kom lub tsheb pib taug kev. Nres pads (piv rau hauv discs thiab nruas pads), uas txuas nrog lub brake discs (nruas) los ntawm lub tsheb lub tshuab nres kom qeeb lossis nres lub tsheb txav.
2. Raws li cov qauv ntawm cov khoom, nws tuaj yeem muab faib ua cov nres nres (disc hom, nruas hom), nres siv, nres ncoo, clutch phaj, thiab isotropic txhuam pad. Cov discs yog tiaj tus, cov nruas yog nkhaus. Nres nkawm khau (tsheb ciav hlau nres, roj rigs) yog cov khoom nkhaus, tab sis nws yog tuab dua li cov ntaub thaiv npog zoo tib yam thiab qhov ntev ntawm 25 mus rau 30 hli. Nres siv feem ntau siv rau hauv kev ua liaj ua teb thiab kev tsim kho tshuab thiab yog cov khoom siv sib txhuam mos. Clutch phaj feem ntau yog cov khoom zoo li lub nplhaib. Heterogeneous kev sib txhuam daim hlau yog tsuas yog siv nyob rau hauv ntau yam kev siv machinery, xws li kev sib txhuam presses, hluav taws xob hoists, thiab lwm yam.
3. Raws li cov khoom siv ntawm cov khoom, nws tuaj yeem muab faib ua ob pawg: cov ntaub ntawv sib txhuam asbestos thiab cov ntaub ntawv tsis-asbestos kev sib txhuam.
A. Cov ntaub ntawv sib txhuam asbestos tau muab faib ua pawg hauv qab no: a, asbestos fiber ntau sib txhuam cov ntaub ntawv, tseem hu ua asbestos velvet cov ntaub ntawv sib txhuam. Ntau lawm: ntau yam nres nres, clutch ncoo, tsheb ciav hlau hluavtaws nres ncoo, asbestos velvet roj hmab siv thiab lwm yam b, asbestos linear kev sib txhuam cov ntaub ntawv. Ntau lawm: qhov txhab clutch phaj, tws asbestos hlau txhuam cov ntaub ntawv, thiab lwm yam., asbestos ntaub txhuam cov ntaub ntawv. Ntau lawm: manufacturing laminated tho txawv tshuab nres pads, nres siv, clutch panels thiab lwm yam d, asbestos woven kev sib txhuam cov ntaub ntawv. Kev tsim khoom: Kev tsim cov roj-impregnated lossis resin-impregnated nres siv. Roj rig brakes, thiab lwm yam B. Cov ntaub ntawv tsis-asbestos kev sib txhuam yog muab faib ua pawg hauv qab no: ib qho, cov khoom sib txhuam semi-hlau. Disc nres ncoo rau tsheb thiab tsheb hnyav. Cov khoom siv feem ntau muaj li 30 feem pua rau 50 feem pua ntawm cov hlau ferrous (xws li steel fiber, txo cov hmoov hlau, hlau ua npuas ncauj hmoov). Yog li ntawd, cov khoom siv sib txhuam semi-metallic yog npaj. Qhov no yog thawj cov khoom siv tsis muaj asbestos los hloov nrog asbestos. Nws cov yam ntxwv: zoo tshav kub tsis kam, siab zog nqus ib cheeb tsam, thermal conductivity loj, tuaj yeem siv rau kev kub ceev, kev ua haujlwm hnyav ntawm lub tsheb nres. Txawm li cas los xij, nws muaj qhov tsis zoo ntawm lub suab nrov braking loj, lub kaum sab xis tawg, thiab lwm yam.
B. NAO cov ntaub ntawv sib txhuam. Hais lus dav dav, nws hais txog cov ntaub ntawv tsis-asbestos-tsis-steel fiber ntau sib txhuam, tab sis cov discs kuj muaj me me ntawm cov hlau fibers. Cov khoom siv hauv paus hauv NAO cov ntaub ntawv sib txhuam yog feem ntau sib xyaw ntawm ob lossis ntau dua fibers (inorganic fibers nrog me me ntawm cov organic fibers). Yog li, NAO cov khoom sib txhuam yog cov khoom siv tsis yog asbestos sib xyaw fiber ntau. Feem ntau, lub nres nres yog ib qho luv luv-txiav fiber ntau txhuam, thiab lub clutch phaj yog ib qho kev sib txhuam fiber ntau txuas ntxiv.
C. hmoov metallurgy cov ntaub ntawv sib txhuam. Kuj hu ua sintered kev sib txhuam cov ntaub ntawv, hlau-raws li, tooj liab-raws li hmoov cov ntaub ntawv yog dhau, molded thiab tov thiab sintered ntawm kub kub. Haum rau kev sib tsoo thiab kev sib kis ntawm qhov kub thiab txias. Xws li: aircraft, tsheb thauj khoom, hnyav siv tshuab nres thiab kis tau tus mob. Qhov zoo: lub neej ua haujlwm ntev; Qhov tsis zoo: cov khoom lag luam siab, lub suab nrov nres, hnyav thiab nkig, hnav loj d, cov khoom siv carbon fiber sib txhuam. Cov khoom siv sib txhuam ua los ntawm carbon fiber ua cov khoom siv ntxiv. Cov pa roj carbon fiber ntau muaj cov qauv siab, thermal conductivity thiab kub tsis kam. Carbon fiber ntau cov ntaub ntawv sib txhuam yog qhov zoo tshaj plaws ntawm txhua hom kev sib txhuam cov ntaub ntawv. Cov pa roj carbon fiber ntau sib txhuam daim hlau muaj peev xwm nqus tau siab thiab lub teeb tshwj xeeb hauv ib cheeb tsam. Nws yog tshwj xeeb tshaj yog haum rau zus tau tej cov aircraft nres pads. Nres pads los ntawm ib co txawv teb chaws high-end tsheb kuj siv. Vim nws tus nqi siab, nws daim ntawv thov ntau yog txwv thiab cov zis yog me me. Hauv kev sib xyaw ntawm cov khoom siv fiber ntau sib txhuam, ntxiv rau carbon fiber, graphite thiab carbon compounds yog siv. Cov organic binders nyob rau hauv cov khoom kuj yog carbonized, yog li cov ntaub ntawv carbon fiber kev sib txhuam kuj hu ua carbon-carbon friction cov ntaub ntawv los yog carbon-raws li cov ntaub ntawv kev sib txhuam.
