PTFEifumaneka kumaBanga amaninzi ahlukeneyo njengeVirgin PTFE, i-PTFE ye-Chemical Modified, i-Carbon ezaliswe yi-PTFE, i-Glass eFayiweyo PTFE, i-Carbon / i-Coke ezaliswe yi-PTFE, i-graphite ezaliswe yi-PTFE, i-Bronze ezaliswe yi-PTFE, i-Bronze + i-Molybdenum Disulphide ezaliswe yi-PTFE, i-Aluminium Oxide ezaliswe yi-Calcide FIFED I-PTFE ezaliswe yi-PTFE, i-PTFE ye-Stainless Steel, i-Mica igcwaliswe i-PTFE, i-Glass + i-MoS2 ezaliswe yi-PTFE, i-PTFE ezaliswe yi-MoS2, i-PTFE ye-Chemical Modified etc.
Uqhagamshelwano phakathi kweendawo ezimbini ze-sliding, ngenxa yokungqubuzana okungenakuphepheka okwenziwa kwindawo yoqhagamshelwano, kubangela ukugqoka okuthile okuxhomekeke kumthwalo, isantya kunye nexesha loqhagamshelwano lwe-sliding.Ngokwethiyori, phakathi kwezi parameters kunye nokunxitywa kwesiphumo kukho unxulumano ngokomlinganiselo:
R = KPVT
apho, echazwe kwiiyunithi zokulinganisa zetheyibhile: R = ukunxiba kwi-mmP = umthwalo othile kwi-N / mm2 (ibhekisa kumphezulu - Ø xl - kwimeko yamatyholo, iingono, njl.) V = isantya sokuslayida kwi-m/secT = ixesha kwi-hrsK = into yokugqoka kwi-mm3 sec / Nmh.
Ixabiso le-PV ye-factor emva kokuba i-coefficient yokugqoka ilahlekelwa ukuziphatha kwayo kumgca, ithatha amaxabiso aphawulekayo kunye nenkqubo edlulayo ukusuka kubuthathaka ukuya kwimeko yokugqoka eqinile, eyaziwa ngokuba yi "PV limit".Lo mda we-PV kunye nento yokunxiba, ngoko ke, iiparitha zeempawu zento nganye.Ngokwenza, nangona kunjalo, inokuqondwa ngokulula, into yokunxiba kunye nomda we-PV wezinto ezifanayo ezizaliswe zinokwahluka kunye nendalo, ukuqina kunye nokugqiba komphezulu womnye umfowunelwa "iqabane" kunye nobukho, okanye hayi, zokupholisa kunye/okanye ulwelo lokuthambisa.
Ukuguqulwa phantsi komthwalo kunye namandla oxinzelelo lwe-PTFE, njengezinye izinto ezininzi zeplastiki, azinayo "indawo ye-elastic" apho umlinganiselo womthwalo / ukuguqulwa (i-Young modulus) inexabiso eliqhubekayo.Lo mthwalo wokulinganisa / ukuguqulwa kuxhomekeke kwixesha lokusetyenziswa komthwalo kunye nokuguqulwa okulandelayo;le nto yaziwa ngokuba "yi-creep", kwaye ekususweni komthwalo, kukho ukubuyiswa kwenxalenye kuphela ye-deformation kwisimo sokuqala ("ukubuyiswa kwe-elastic"), ukuze sihlale siphambi "kwe-deformation esisigxina." ”.
I-Creep, ngokucacileyo ayingomsebenzi wexesha, isiphumo emva nje kweeyure ezingama-24 kuguquko oluthi kwiimeko ezininzi lungathathelwa ngqalelo.Ngokunyuka kweqondo lokushisa, kukho ukuwa kwe-deformation phantsi kweepropati zomthwalo kwaye ngenxa yoko amandla oxinzelelo asele e-100 ° C alingana ne-1/2 yaloo 23 ° C kunye ne-200 ° C malunga ne-1 / 10th.
Kuyo nayiphi na imeko, PTFE kwaye ngokukodwaizaliswe PTFE, yenye yezinto zeplastiki ezigcinayo, kumaqondo okushisa aphezulu, iipropathi ezifanelekileyo ze-deformation phantsi komthwalo.Ukugqiba, ukubuyiswa kwe-elastic malunga ne-50% ye-deformations phantsi komthwalo, kunye ne-deformations engapheliyo ilingana ne-50% ye-deformations phantsi komthwalo.
Oku kusebenza kwi-PTFE egcwalisiweyo nengazaliswanga.Iipropati zokuqala nangona kunjalo zigqitywe ukuba ziphezulu.Enyanisweni, i-deformation phantsi komthwalo weentlobo eziqhelekileyo ze-PTFE ezigcweleyo zimalunga ne-1/4 yezo zingazaliswanga, ngelixa amandla oxinzelelo malunga nokuphindwe kabini.
IiPropati zoThermal ze-PTFE ezigcwalisiweyo
Ukwandiswa kwe-thermal ye-PTFE egcweleyo ingaphantsi ngokubanzi kuleyo ye-PTFE engazaliswanga kwaye ihlala inkulu kwicala lokubumba kunokuwela.I-thermal conductivity iphezulu kune-PTFE engagcwaliswanga, ngakumbi xa usebenzisa izihlungi ezinomgangatho ophezulu wokuhamba kwe-thermal.
I-PTFE egcweleyo ke ngoko ineempawu ezingcono zobushushu kunezo zingazaliswanga.
IiPropati zoMbane ze-PTFE eZalisiweyo
Ezi mpawu zixhomekeke kwiqondo elikhulu kubume besithambiso.Kuphela yi-PTFE ezaliswe yifayibha yeglasi eneempawu ezilungileyo zedielectric, nangona zahlukile kwezo ze-PTFE ezingazaliswanga.Ngokomzekelo, umthamo kunye nokumelana nomgangatho ophezulu, i-dielectric constant kunye ne-dissipation factor iyahluka kakhulu ngokuhlukahluka kokufuma kunye nokuphindaphinda.
Ixesha lokuposa: Aug-04-2018