Mu dziko lovuta la kutseka mafakitale, Polytetrafluoroethylene (PTFE) ndi chinthu chamtengo wapatali chifukwa cha kukana kwake mankhwala, kupsinjika kochepa, komanso kuthekera kugwira ntchito pa kutentha kwakukulu. Komabe, pamene ntchito zimasintha kuchoka pa zinthu zosasinthasintha kupita ku zinthu zosinthasintha—ndi kupsinjika kosinthasintha, kutentha, ndi kuyenda kosalekeza—zinthu zomwe zimapangitsa PTFE kukhala yopindulitsa zimatha kuyambitsa mavuto akuluakulu auinjiniya. Nkhaniyi ikufotokoza za fizikisi yomwe ili kumbuyo kwa machitidwe a PTFE m'malo osinthasintha ndikuwunika njira zopangira zokhwima, zotsimikizika zomwe zimathandiza kuti igwiritsidwe ntchito bwino pakugwiritsa ntchito kofunikira kuyambira pa ndege kupita ku makina apamwamba a magalimoto.
Ⅰ. Vuto Lalikulu: Katundu wa Zinthu za PTFE Akuyenda
PTFE si elastomer. Kachitidwe kake pansi pa kupsinjika ndi kutentha kumasiyana kwambiri ndi zinthu monga NBR kapena FKM, zomwe zimafuna njira yosiyana yopangira. Mavuto akuluakulu pakutseka kwamphamvu ndi awa:
Kuyenda Kozizira (Kuyenda Kwambiri):PTFE imasonyeza chizolowezi chosintha mawonekedwe a pulasitiki chifukwa cha kupsinjika kwa makina kosalekeza, chinthu chomwe chimadziwika kuti kuzizira kapena kukwera. Mu chisindikizo chosinthasintha, kupanikizika kosalekeza ndi kukangana kungayambitse PTFE kusinthasintha pang'onopang'ono, zomwe zimapangitsa kuti mphamvu yoyambira yotseka (katundu) itayike ndipo pamapeto pake, kulephera kwa chisindikizo.
Modulus Yotsika Yotanuka:PTFE ndi chinthu chofewa komanso chosavuta kusinthasintha. Mosiyana ndi mphete ya rabara ya O yomwe imatha kubwerera ku mawonekedwe ake oyambirira ikasintha, PTFE imachira pang'ono. Pakakhala kupanikizika mwachangu kapena kusintha kwa kutentha, kulimba mtima kumeneku kumatha kuletsa chisindikizocho kuti chisagwirizane nthawi zonse ndi malo otsekera.
Zotsatira za Kukula kwa Kutentha:Zipangizo zosinthasintha nthawi zambiri zimakhala ndi kutentha kwakukulu. PTFE imakhala ndi kutentha kwakukulu. Mu kutentha kwakukulu, chisindikizo cha PTFE chimakula, zomwe zingawonjezere mphamvu yotsekera. Chikazizira, chimachepa, zomwe zimatha kutsegula mpata ndikuyambitsa kutuluka kwa madzi. Izi zimakulitsidwa ndi kuchuluka kwa kutentha kwa chisindikizo cha PTFE ndi nyumba/shaft yachitsulo, zomwe zimasintha malo ogwirira ntchito.
Popanda kuthana ndi makhalidwe amenewa, chisindikizo cha PTFE chosavuta sichingakhale chodalirika pa ntchito zosinthasintha.
Ⅱ.Mayankho a Uinjiniya: Momwe Kapangidwe Kanzeru Kamalipirira Zofooka za Zinthu
Yankho la makampani pa mavuto amenewa si kukana PTFE koma kuiwonjezera kudzera mu kapangidwe ka makina anzeru. Cholinga chake ndikupereka mphamvu yokhazikika komanso yodalirika yotsekera yomwe PTFE yokha singasunge.
1. Zisindikizo Zolimbikitsidwa ndi Masika: Muyezo Wagolide wa Ntchito Yosinthasintha
Iyi ndi njira yothandiza kwambiri komanso yogwiritsidwa ntchito kwambiri pokonza ma dynamic PTFE seals. Chisindikizo chopangidwa ndi masika chimakhala ndi jekete la PTFE (kapena polima ina) yomwe imaphimba masika achitsulo.
Momwe Imagwirira Ntchito: Kasupeyu amagwira ntchito ngati gwero lamphamvu lokhazikika komanso lolimba. Amakankhira mlomo wa PTFE kunja mosalekeza motsutsana ndi pamwamba pa chitseko. Pamene jekete la PTFE likuvala kapena kuzizira, kasupeyu amakula kuti agwirizane ndi izi, zomwe zimapangitsa kuti chitsekocho chikhale cholimba nthawi zonse.
Zabwino Kwambiri: Kugwiritsa ntchito ndi kuthamanga kwa mphamvu, kutentha kwakukulu, mafuta ochepa, komanso komwe kutsika kwa madzi kumakhala kofunikira kwambiri. Mitundu yodziwika bwino ya masika (cantilever, helical, canted coil) imasankhidwa kutengera kukakamizidwa ndi kupsinjika kwina.
2. Zipangizo Zophatikizana: Kukulitsa PTFE Kuchokera Mkati
PTFE ikhoza kuwonjezeredwa ndi zodzaza zosiyanasiyana kuti ikonze bwino mawonekedwe ake amakina. Zodzaza zomwe zimagwiritsidwa ntchito nthawi zambiri zimaphatikizapo ulusi wagalasi, kaboni, graphite, bronze, ndi MoS₂.
Momwe Imagwirira Ntchito: Zodzaza izi zimachepetsa kuyenda kozizira, zimawonjezera kukana kuwonongeka, zimawonjezera kutentha, komanso zimawonjezera mphamvu ya PTFE yoyambira. Izi zimapangitsa kuti chisindikizocho chikhale chokhazikika komanso chotha kupirira malo owuma.
Zabwino Kwambiri: Kukonza magwiridwe antchito a seal kuti agwirizane ndi zosowa zinazake. Mwachitsanzo, zodzaza za kaboni/grafiti zimawonjezera kukhuthala ndi kukana kuwonongeka, pomwe zodzaza zamkuwa zimawonjezera mphamvu ya kutentha komanso mphamvu yonyamula katundu.
3. Mapangidwe a V-Ring: Kusindikiza kwa Axial Kosavuta Komanso Kogwira Mtima
Ngakhale kuti si chisindikizo chachikulu cha radial shaft, mphete za V zochokera ku PTFE ndi zabwino kwambiri pakugwiritsa ntchito ma axial amphamvu.
Momwe Imagwirira Ntchito: Mphete zambiri za V zimayikidwa pamodzi. Kukanikiza kwa axial komwe kumachitika pomanga kumapangitsa kuti milomo ya mphetezo ikule mozungulira, zomwe zimapangitsa kuti ikhale yotseka. Kapangidwe kake kamapereka mphamvu yodzitetezera yokha pakuwonongeka.
Zabwino Kwambiri: Kuteteza maberiyani oyambira ku kuipitsidwa, kugwira ntchito ngati chokokera chopepuka kapena mlomo wa fumbi, komanso kugwira ntchito yozungulira.
Ⅲ. Mndandanda Wanu Woyang'anira Kapangidwe ka Kusankha Chisindikizo Cha Dynamic PTFE
Kuti musankhe kapangidwe koyenera ka chisindikizo cha PTFE, njira yokhazikika ndiyofunikira. Musanalankhule ndi wogulitsa wanu, sonkhanitsani zambiri zofunika izi:
Mbiri ya Kupanikizika: Sikuti kupanikizika kwakukulu kokha, komanso kuchuluka (mphindi/max), kuchuluka kwa kayendedwe kake, ndi kuchuluka kwa kusintha kwa kuthamanga (dP/dt).
Kuchuluka kwa Kutentha: Kutentha kocheperako komanso kwakukulu komwe kumagwiritsidwa ntchito, komanso liwiro la kuzungulira kwa kutentha.
Mtundu wa Kuyenda Kosinthasintha: Kuzungulira, kugwedezeka, kapena kubwerezabwereza? Phatikizani liwiro (RPM) kapena ma frequency (ma cycle/minute).
Zailesi: Ndi madzi kapena mpweya uti womwe ukutsekedwa? Kugwirizana ndikofunika kwambiri.
Chiŵerengero Chololedwa cha Kutayikira: Tanthauzirani kutayikira kwakukulu kovomerezeka (monga, cc/hr).
Zipangizo Zamakina: Kodi shaft ndi zipangizo zomangira nyumba ndi chiyani? Kulimba kwake ndi mawonekedwe ake ndizofunikira kwambiri pakuwonongeka.
Zinthu Zachilengedwe: Kupezeka kwa zinthu zodetsa, kuwala kwa UV, kapena zinthu zina zakunja.
Mapeto: Kapangidwe Koyenera ka Mphamvu Zofuna
PTFE ikadali chida chabwino kwambiri chotsekera zinthu m'malo ovuta. Chinsinsi cha kupambana chili pakuzindikira zofooka zake ndikugwiritsa ntchito njira zolimba zaukadaulo kuti zithetsedwe. Mwa kumvetsetsa mfundo zomwe zili kumbuyo kwa zisindikizo zolimbikitsidwa ndi masika, zida zophatikizika, ndi ma geometries enaake, mainjiniya amatha kupanga zisankho zodziwikiratu zomwe zimatsimikizira kudalirika kwa nthawi yayitali. Ku Yokey, timadziwa bwino kugwiritsa ntchito mfundozi kuti tipange njira zotsekera zolondola kwambiri. Ukadaulo wathu uli pakuthandiza makasitomala kugwiritsa ntchito njira zovuta izi kuti asankhe kapena kupanga chisindikizo chomwe chimagwira ntchito moyenera pansi pa mikhalidwe yovuta kwambiri.
Kodi muli ndi pulogalamu yovuta yotsekera zinthu? Tipatseni magawo anu, ndipo gulu lathu la mainjiniya lidzakupatsani kusanthula kwaukadaulo ndi upangiri wazinthu.
Nthawi yotumizira: Novembala-19-2025