Raws li qhov loj ntawm kev lag luam tau dhau los ua qhov xav tau ntau dua nrog qhov kub siab dua, qhov chaw ua kom sov, siab dua, thiab lwm yam ... tus qauv elastomeric foob tsis tuaj yeem muab lub neej expectancy xav tau rau cov tuam txhab kom muaj kev sib tw.Polytetrafluoroethylene (PTFE) muab lub sijhawm los khiav ntawm RPMs siab dua, siab dua thiab qis dua, thiab muaj kev kub ntxhov ntau dua li lub foob elastomeric.
Qhov no yog vim qhov tseeb tias PTFE yog cov khoom siv tsis zoo, tsim los tiv thaiv qhov kub thiab txias, muaj kev sib txhuam qis, thiab thaum ua ke nrog cov khoom siv, PTFE muaj cov yam ntxwv tshwj xeeb hnav thiab lwm yam khoom siv uas elastomer seals tsis tuaj yeem.
PTFE yog cov tshuaj tiv thaiv ntau dua li PEEK.Nws yog ntau softer thiab li no yuav siv sij hawm tsawg clamping quab yuam kom ua tau ib lub foob, tab sis nws kuj creeps ntawm qhov kub thiab txias ntau tshaj li PEEK ua.Nws kuj yog nplua-muaj qhov sib txhuam tsis tshua muaj kev sib txhuam txhais tau hais tias qhov chaw tuaj yeem xaub dhau ib qho yooj yim dua, ua rau qis dua lub zog hauv kev sib hloov cov ntawv thov thiab lwm yam.
PEEK yog ib qho nyuaj, ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom.Nws kim.Nws kuj yog resistant rau kub heev.Koj siv nws feem ntau tsuas yog qhov twg PTFE lossis TFE reinforced yuav tsis tuav cov cua sov.
Moltenmetal yog qhov tseeb, tsis yog PEEK lossis (khoom) PTFE yog elastomers, lawv yog thermoplastic polymers.
PEEK muaj lub zog zoo txhua yam, muaj peev xwm kub siab, tshuaj lom neeg sib raug zoo, thiab hnav tsis kam.PTFE muaj qhov muaj peev xwm qis / siab kub, tsis muaj kev sib txhuam, thiab muaj tshuaj lom neeg.Ob qho khoom siv tuaj yeem tsim los ntawm machining lossis molding.PEEK feem ntau kim dua PTFE ntawm $ / lb raw khoom tus nqi, tab sis feem ntau cov ntawv thov foob yuav xav tau cov khoom siv me me yog tias siv molding los tsim cov khoom foob.Rau kev ua haujlwm siab seal daim ntawv thov cov khoom siv raw cov nqi sib txawv yuav tsum tsis txhob muaj kev txhawj xeeb loj.Tab sis rau qhov ntim siab, cov khoom siv qis qis kuv tuaj yeem pom qhov twg nws yuav yog qhov teeb meem.
Rau daim ntawv thov foob dynamic, qhov twg tsis siab dhau, PTFE tej zaum yuav yog qhov kev xaiv zoo vim nws muaj kev sib txhuam zoo heev thiab cov yam ntxwv ua tau zoo.Ib qho zoo tshwj xeeb tshaj yog hais txog PTFE foob khiav tawm ntawm cov hlau nto yog tias dhau sij hawm ib txheej ntawm PTFE raug xa mus rau cov hlau nto, uas ua rau PTFE-on-PTFE tiv tauj nrog kev sib txhuam tsawg heev thiab to.Ib qho kev txwv loj ntawm kev siv PTFE uas tsis tau ua tiav rau lub siab sealing yog tias nws muaj lub siab nyiam txias-ntws thaum raug kev kub ntxhov nyob rau lub sijhawm ntev.
ETFE yog cov thermoplastic nruj.FEP fluorinated ethylene propylene) kuj yog cov thermoplastic nruj, tab sis nws yog softer dua PFA lossis PTFE- nws tsis yog elastomer.Polytetrafluoroethylene-co-propylene (Aflas) yog ib qho elastomer, raws li tus qauv fluoroelastomer (tradename Viton- (FKM)) thiab perfluoroelastomers zoo li lub npe lag luam Kalrez (FFKM).Txhua yam tuaj yeem siv tau rau hauv daim ntawv thov sealing (packing a, gaskets, valve seats) tab sis tsuas yog cov elastomers tuaj yeem siv rau hauv tus kheej energizing seals xws li o rings.O rings tuaj yeem ntim nrog cov ntaub ntawv uas tsis yog lastomeric tab sis nws tuaj yeem cuam tshuam rau lawv lub peev xwm los kaw cov pa roj.
Post lub sij hawm: Feb-27-2017