Emkhakheni wezinto zepulasitiki,I-PTFE(i-polytetrafluoroethylene) igqama njengesixazululo esihle kakhulu nesiguquguqukayo sezinhlelo zokusebenza ezahlukahlukene. Ngezakhiwo zayo ezinhle kakhulu kanye nohlu olubanzi lwezicelo, isiphenduke into ebaluleke kakhulu ezimbonini ezahlukahlukene. Kulokhu okuthunyelwe kwebhulogi, sizohlola izici kanye nezinzuzo ze-PTFE rods, ezitholakala ngazo zombili izinhlobo ezikhishwe nabunjiwe.
Ukuqala ngezinhlobo ezikhishiwe, lezi zinduku zenziwa ngawo wonke amasayizi ajwayelekile, ukusuka ku-1/8" ububanzi kuye ku-8 ohlaba umxhwele. Ubude obujwayelekile be-PTFE extruded rod cishe bungu-1000mm, okwenza busebenze kabanzi. Ngakolunye uhlangothi, extrudedI-PTFE indukus atholakala ngobubanzi obungafika kuma-intshi angu-16 nobude obungu-300 mm. Izinketho eziningi zosayizi ziqinisekisa ukuthi amakhasimende angathola umkhiqizo ovumelana kangcono nezidingo zawo ezithile.
Enye yezinzuzo ezibalulekile zeI-PTFE indukus ukusebenza okuthuthukisiwe ngokusetshenziswa kwezinto zokugcwalisa (zokuqinisa). Lezi zinduku zingenziwa ngezinto ezihlukahlukene zokuqinisa ezifana ne-fiberglass, i-graphite nethusi. Lokhu kuqiniswa kuthuthukisa kakhulu izakhiwo zemishini ye-PTFE, ikwenze kube ukukhetha okulungile kwezicelo ezifunayo.
Ukumelana nesimo sezulu kungenye yezinto eziyinhloko ze-PTFE rods, impahla inempilo engcono kakhulu yokuguga phakathi kwamapulasitiki. Lokhu kusho ukuthi izinduku ze-PTFE zingamelana nezimo zezulu ezinzima ngaphandle kokulahlekelwa izakhiwo zazo noma ukwehlisa isithunzi ngokuhamba kwesikhathi. Ngaphezu kwalokho,I-PTFE indukus zinokumelana nokugqwala okuhle kakhulu, okuzenza zilungele ukusetshenziswa okubandakanya ama-asidi aqinile, izisekelo, amanzi, nezinyibilikisi ezihlukahlukene eziphilayo.
Esinye isici esiphawulekayo sezinduku ze-PTFE ukuthambisa kwazo okuphezulu, okuvame ukubhekwa njenge-coefficient ephansi yokungqubuzana phakathi kwamapulasitiki. Nge-coefficient of friction ephansi njengo-0.04, izinduku ze-PTFE zihlinzeka ngokuthambisa okuhle kakhulu, ukunciphisa ukuguga nokuqinisekisa ukusebenza okushelelayo ezinhlelweni ezihlukene.
Enye yezindawo lapho i-PTFE ikhanya khona ngempela amandla ayo okumelana namazinga okushisa aphezulu.I-PTFE indukus ingamelana namazinga okushisa esevisi yesikhathi eside angu-200 kuya ku-260 degrees Celsius, okuwenza afanelekele ukusetshenziswa ezindaweni ezishisa kakhulu. Lokhu kumelana nokushisa okuphezulu kuthuthukisa ukuthembeka nokuqina kwezinduku ze-PTFE.
Ngokuphambene, izinduku ze-PTFE nazo zibonisa ukusebenza okuhle kakhulu emazingeni okushisa aphansi. Ngisho noma izinga lokushisa lehla liye ku--196 degrees Celsius, induku ye-PTFE isengakwazi ukulondoloza ubude obungu-5%, ibonise ukuguquguquka kwayo okuhle kakhulu nokunwebeka ngaphansi kwezimo ezibandayo kakhulu.
Ukwengeza, izinduku ze-PTFE zingashuthelwa izinjongo zokuhlanganisa, okuvumela ukuxhumana okuphephile kanye nokuhlukahluka kohlelo lokusebenza. Lesi sakhiwo senza izinti ze-PTFE zilungele imiklamo ehlukahlukene yesakhiwo nobunjiniyela.
Sengiphetha, izinduku ze-PTFE ziyisixazululo esiguquguqukayo nesithembekile esinezici ezimangalisayo. Atholakala ngawo womabili amafomu akhishiwe nabunjiwe, kanye nezinketho zosayizi abahlukahlukene, okuvumela ukuguquguquka ukuze kuhlangatshezwane nezidingo ezihlukene zohlelo lokusebenza. Ukusebenza okuthuthukisiwe okutholwe yizinto zokuqinisa futhi kwandisa ububanzi bohlelo lokusebenzaPTFE izinduku. Kusukela esimweni sezulu kanye nokugqwala kokumelana nokugcotshwa okuphezulu, ukumelana nezinga lokushisa ngisho nokusebenza kwe-cryogenic, izinduku ze-PTFE zinikeza inhlanganisela yezimfanelo ezingenakuqhathaniswa. Ngakho-ke noma udinga impahla ethembekile yezinhlelo zokusebenza zesakhiwo, imboni yamakhemikhali, noma okunye, cabangela izinduku ze-PTFE ngokusebenza kwayo okuhle kakhulu nokuqina okuhlala isikhathi eside.
Isikhathi sokuthumela: Aug-30-2023
