PTFE, eyaziwa ngokuba yi-polymer, i-polymer efumene ukubaluleka kwizicelo zoshishino ngexesha lesibini senkulungwane yamashumi amabini.I-coefficient ephantsi ye-friction kunye ne-inertness yenza ukuba ifaneleke kuphela kwizinto zokupheka, kodwa kunye nezitywina kwiivalve zoshishino.Nangona kunjalo, imathiriyeli ibonisa iipropathi ezingafunekiyo zoomatshini, ezinje ngokuphumla koxinzelelo (okt ukulahleka kokuqina ngokuhamba kwexesha) kunye nokuxhomekeka kobushushu, okunokubangela iingxaki kwizicelo ezithile.
Esinye isicelo apho i-PTFE ingqineke inenzuzo kwezinye izinto isezitywinweni ezisetyenziswa kwiivalvu zeplagi kwishishini.Iivalvu zeeplagi ze-industrial zisetyenziselwa ukuthutha iintlobo ezahlukeneyo zolwelo, kwaye ngenxa yoko ziphantsi kweemeko ezinzima, ezifana nokuhlaselwa kweekhemikhali kunye namaqondo obushushu aphezulu.Amatywina kufuneka ahlangabezane nemfuneko yokumelana neekhemikhali, ngelixa ekhusela ukuvuza ngamaxesha onke.Umnqweno wokunciphisa iindleko zokuvelisa ngelixa uphucula ukusebenza kuye kwakhokelela kwisidingo se-slimmer seals, kunye neemfuno eziphezulu kwizinto eziphathekayo.Ukuqonda kakuhle indlela iistresi ezingaphakathi kwesitywina ezisasazwa ngayo kuyafuneka.Ngaphezu koko, isenzeko sokuphumla koxinzelelo kunye nokuxhomekeka kobushushu kunomdla kwaye kufuneka zithathelwe ingqalelo ngokunjalo, ukuqikelela indlela yokuziphatha kwesitywina.
I-PTFE sisixhobo esilawulayo esisetyenziselwa ukutywina ulwelo ngaphakathi nangaphakathi emoyeni.Ukutywinwa kwangaphakathi kunikezelwa yiUmkhono we-PTFEexinzelelwe phakathi komzimba kunye neplagi, ngelixa ukutywinwa kwangaphandle kuqinisekiswa yi-PTFE top seal.
I-PTFE yipolymer efunyenwe ngo-1938 nguRoy Plunkett weNkampani yeDuPont.Ubume bayo bekhemikhali buqulathe amatyathanga eeathom zekhabhoni ezidityaniswe kunye, kunye namasebe eeathom zefluorine adityaniselwe.Izinto eziphathekayo zihlala zibizwa ngokuba yi-polytetrafluoroethylene (PTFE), ngelixa i-polymer luphawu lwentengiso olubhalisiweyo lweNkampani yeDuPont.
I-PTFE ibe yinto ebalulekileyo yobunjineli.Iingenelo zayo eziphambili luphawu olunganamatheliyo, ukunganyangeki, ukuchasana nokuhlaselwa kweekhemikhali kunye namandla aphezulu.Ngaphezu koko, iipropathi ezithile zomzimba zinokuphuculwa ngokongeza iikhompawundi zokugcwalisa okanye ukuguqula inkqubo yokuvelisa.Ezinye izinto ezingalunganga ezenziwa ngamava e-PTFE luvakalelo oluphezulu kutshintsho lobushushu kunye nokuxhathisa okulambathayo ekurhubuluzeni nasekuphumleni koxinzelelo.Ubume obuntsonkothileyo nobungakhethi cala kwezi mpawu bubonisa umsebenzi oethe-ethe kuyo nayiphi na injineli enqwenela ukuqikelela ukuziphatha kwe-PTFE.
Enye into ebangela ukuba i-PTFE ikhathazwe kukunyibilika kwayo okuphezulu okwenza ukuba inaliti kunye nokuvuthela kungenzeki, okushiya iindlela zokuvelisa ezibiza kakhulu, ezifana ne-sintering kunye ne-extrusion, ukhetho lodwa lwenxalenye yemveliso.
Ixesha lokuposa: Dec-30-2017