Hauv thaj chaw ntawm cov khoom siv yas,PTFE(polytetrafluoroethylene) sawv tawm ua ib qho kev daws teeb meem zoo heev thiab siv tau ntau yam rau ntau yam kev siv. Nrog nws cov khoom zoo heev thiab ntau yam kev siv, nws tau dhau los ua cov khoom siv tseem ceeb hauv ntau yam kev lag luam. Hauv tsab ntawv blog no, peb yuav tshawb nrhiav cov khoom thiab cov txiaj ntsig ntawm PTFE rods, uas muaj nyob rau hauv ob qho tib si extruded thiab molded daim ntawv.
Pib nrog cov hom extruded, cov pas nrig no yog tsim los ntawm txhua qhov loj me, los ntawm 1/8 "hauv txoj kab uas hla mus rau qhov zoo kawg nkaus 8". Qhov ntev dav dav ntawm PTFE extruded pas nrig yog li 1000 hli, uas ua rau nws siv tau dav. Ntawm qhov tod tes, extrudedPTFE pas nrigs muaj nyob rau hauv txoj kab uas hla mus txog 16 nti thiab ntev tshaj plaws ntawm 300 hli. Ntau yam kev xaiv loj ua kom cov neeg siv khoom tuaj yeem nrhiav tau cov khoom uas haum rau lawv cov kev xav tau tshwj xeeb.
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawmPTFE pas nrigs yog qhov kev ua tau zoo dua los ntawm kev siv cov khoom siv ntxiv (khoom siv ntxiv). Cov pas nrig no tuaj yeem ua nrog ntau yam khoom siv ntxiv xws li fiberglass, graphite thiab bronze. Cov khoom siv ntxiv no txhim kho cov khoom siv kho tshuab ntawm PTFE, ua rau nws yog qhov kev xaiv tsim nyog rau cov ntawv thov uas xav tau ntau.
Kev tiv thaiv huab cua yog ib qho ntawm cov khoom tseem ceeb ntawm PTFE rods, cov khoom siv muaj lub neej laus zoo tshaj plaws ntawm cov yas. Qhov no txhais tau tias PTFE rods tuaj yeem tiv taus huab cua hnyav yam tsis poob lawv cov khoom lossis lwj dhau sijhawm. Tsis tas li ntawd,PTFE pas nrigs muaj kev tiv thaiv corrosion zoo heev, ua rau lawv zoo tagnrho rau cov ntawv thov uas muaj cov kua qaub muaj zog, cov hauv paus, dej, thiab ntau yam organic solvents.
Lwm qhov tseem ceeb ntawm PTFE rods yog lawv cov roj nplua nyeem siab, uas feem ntau suav tias muaj qhov coefficient qis tshaj plaws ntawm kev sib txhuam ntawm cov yas. Nrog rau qhov coefficient ntawm kev sib txhuam qis li 0.04, PTFE rods muab cov roj nplua nyeem zoo heev, txo qhov hnav thiab ua kom muaj kev ua haujlwm zoo hauv ntau yam kev siv.
Ib qho ntawm cov cheeb tsam uas PTFE ci ntsa iab yog nws lub peev xwm los tiv taus qhov kub siab.PTFE pas nrigs tuaj yeem tiv taus qhov kub thiab txias mus sij hawm ntev ntawm 200 txog 260 degrees Celsius, ua rau lawv haum rau kev siv hauv qhov chaw kub heev. Qhov kev tiv thaiv cua sov zoo dua no ua rau kev ntseeg siab thiab kev ua haujlwm ntev ntawm PTFE rods.
Nyob rau hauv sib piv, PTFE rods kuj ua tau zoo heev ntawm qhov kub qis. Txawm tias qhov kub poob rau -196 degrees Celsius, PTFE rod tseem tuaj yeem tswj tau qhov ntev ntawm 5%, qhia nws qhov kev ywj pheej zoo heev thiab elasticity nyob rau hauv cov xwm txheej txias heev.
Tsis tas li ntawd xwb, PTFE rods tuaj yeem raug etched rau kev sib txuas, uas tso cai rau kev sib txuas ruaj ntseg thiab kev siv ntau yam. Cov cuab yeej no ua rau PTFE rods zoo tagnrho rau ntau yam kev tsim kho thiab kev tsim kho.
Xaus lus, PTFE rods yog ib qho kev daws teeb meem uas siv tau ntau yam thiab txhim khu kev qha nrog cov yam ntxwv zoo kawg nkaus. Lawv muaj nyob rau hauv ob qho tib si extruded thiab molded daim ntawv, ntxiv rau ntau yam kev xaiv qhov loj me, tso cai rau kev ywj pheej kom tau raws li cov kev xav tau ntawm daim ntawv thov sib txawv. Kev ua tau zoo dua los ntawm cov khoom siv txhawb nqa ntxiv nthuav dav ntau yam kev siv ntawmPTFE pas nrig. Los ntawm huab cua thiab corrosion tsis kam mus rau high lubricity, kub tsis kam thiab txawm tias cryogenic kev ua tau zoo, PTFE rods muab kev sib xyaw ua ke ntawm cov zoo. Yog li ntawd, seb koj puas xav tau cov khoom siv txhim khu kev qha rau cov qauv siv, kev lag luam tshuaj lom neeg, lossis lwm yam, xav txog PTFE rods rau nws cov kev ua tau zoo heev thiab kev ua haujlwm ntev.
Lub sijhawm tshaj tawm: Lub Yim Hli-30-2023
