Njengoko udederhu olukhulu lwemizi-mveliso luye lwaba lunemfuno emandla ngamaqondo obushushu aphezulu, iimeko zecaustic, uxinzelelo oluphezulu, njl.njl...itywina eliqhelekileyo elastomeric belingasenako ukunika ubomi obufunekayo ukuze iinkampani zihlale zikhuphisana.Polytetrafluoroethylene (PTFE) inika ithuba lokubaleka kwii-RPM eziphezulu, amaqondo okushisa aphezulu naphantsi, kunye noxinzelelo oluphezulu kakhulu kune-elastomeric seal.
Oku kungenxa yokuba i-PTFE yimathiriyeli engasebenziyo, ephuhliswe ukumelana nobushushu obunzima, inomlinganiso osezantsi wokukhuhlana, kwaye xa idityaniswe nezihluzi ezikhethiweyo, i-PTFE inikezela ngeempawu zokunxiba ezikhethekileyo kunye nezinye iipropathi zomatshini ezingenako ukutywinwa kwe-elastomer.
I-PTFE ixhathisa ngokwekhemikhali kune-PEEK.Ithambile KAKHULU kwaye kungoko ithatha amandla amancinci okubamba ukuphumeza itywina, kodwa ikwarhubuluza kubushushu obusezantsi kakhulu kune-PEEK.Ikwamtyibilizi- ukuba ne-coefficient ephantsi yokukhuhlana kuthetha ukuba iindawo zinokutyibilika zidlule enye kwenye ngokulula, okukhokelela kwitorque esezantsi ekujikelezeni kwezicelo zetywina njl.njl.
I-PEEK yipolima enzima kakhulu, eshinyeneyo, eqinileyo.Iyabiza.Iyakwazi ukumelana namaqondo obushushu aphezulu.Uyisebenzisa ngokuqhelekileyo kuphela apho i-PTFE okanye i-TFE eyomeleziweyo ingayi kubamba ubushushu.
I-Moltenmetal ichanekile, ingeyiyo iPEEK okanye (eqinile) i-PTFE zii-elastomers, ziipholima ze-thermoplastic.
I-PEEK inamandla omatshini abalaseleyo, amandla aphezulu obushushu, ukuhambelana kweekhemikhali, kunye nokumelana nokunxiba.I-PTFE inamandla abalaseleyo asezantsi/ubushushu obuphezulu, iipropathi zokukhuhlana okuphantsi, kwaye ayisebenzi ngokwekhemikhali.Zombini izixhobo zinokwenziwa ngomatshini okanye ngokubumba.I-PEEK idla ngokubiza ngaphezulu kwe-PTFE ngesiseko sexabiso lemathiriyeli eyi-$/lb, kodwa uninzi lwezicelo zokutywina ziya kufuna izixa ezingephi zemathiriyeli ukuba ukubumba kusetyenziselwa ukwenza into yokutywina.Kwizicelo zokutywina ezikumgangatho ophezulu umahluko weendleko zemathiriyeli ekrwada akufunekanga ube yinkxalabo enkulu.Kodwa kwi-volume ephezulu, isicelo semveliso yexabiso eliphantsi ndandibona apho inokuba ngumba.
Kusetyenziso lwetywina oluguquguqukayo, apho uxinzelelo lungekho phezulu kakhulu, i-PTFE inokuba lukhetho olulungileyo kuba ineempawu ezibalaseleyo zokukhuhlane kunye nokuhambelana.Enye into emnandi kakhulu malunga netywina le-PTFE elisebenza ngokuchasene nomphezulu wesinyithi kukuba ngokuhamba kwexesha umaleko we-PTFE ukhutshelwa kumphezulu wesinyithi, okhokelela kuqhagamshelwano lwe-PTFE-on-PTFE kunye nokukhuhlana okuphantsi kakhulu kunye nokuvuza.Umda omnye omkhulu wokusebenzisa i-PTFE engagcwaliswanga yokutywinwa koxinzelelo kukuba inotyekelo lokuhamba okubandayo xa ibonakaliswe kuxinzelelo oluzinzileyo kwixesha elide.
I-ETFE yi-thermoplastic eqinile.FEP fluorinated ethylene propylene) ikwayirigid thermoplastic, nangona ithambile kunePFA okanye PTFE- ayisiyo elastomer.I-Polytetrafluoroethylene-co-propylene (Aflas) yi-elastomer, njenge-fluoroelastomer eqhelekileyo (igama lokuthengisa i-Viton- (FKM)) kunye ne-perfluoroelastomers ezifana negama lokuthengisa elithi Kalrez (FFKM).Zonke zingasetyenziselwa ukutywina usetyenziso (ukupakisha i-a, iigaskets, izitulo zevalvu) kodwa zii-elastomer kuphela ezinokuthi zisetyenziswe ekuzitywineni ngokwazo ezifana neringi.Izangqa ze-O zinokugqunywa kunye nemathiriyeli ye-nonelastomeric kodwa inako kwaye iyakuchaphazela ukukwazi kwabo ukutywina igesi.
Ixesha lokuposa: Feb-27-2017