Mphete zosunga zobwezeretsera, zomwe zimadziwikanso kuti anti-extrusion mphete za BURs, zimapanga ndendende zomwe dzina lawo limatanthawuza: zimakhala ngati chithandizo chothandizira kusindikiza misonkhano.
Pali zinthu zingapo zomwe zimagwiritsidwa ntchito popanga mphete zosunga zobwezeretsera, kuphatikiza ma polima ndi ma elastomer.Ma polima odziwika kwambiri a mphete zosunga zobwezeretsera ndi PEEK, Nylon, ndi PTFE.Kusankha zomwe mungagwiritse ntchito nthawi zambiri kumatengera kukakamizidwa komanso kutentha.
Mu positi iyi yabulogu, tiwunikanso cholinga ndi kagwiritsidwe ka mphete zosunga zosunga zobwezeretsera, kenako tikambirana za kuthamanga ndi kutentha komwe PEEK, Nylon, ndi PTFE ndizoyenera.Cholinga cha Backup Rings
Mphete yosungira bwino yomwe imayikidwa pakati pa o-ring ndi kusiyana kwa chilolezo imatha kulepheretsa chisindikizo cha o-ring kuti chisatuluke mumpata pamene chimapereka chithandizo ndi chitetezo ku o-ring.Amagwira ntchito bwino pamene pali kusiyana kwakukulu kwa extrusion, kutentha kwakukulu, kapena kupanikizika kwakukulu.Zosungira zosunga zobwezeretsera zimagwiritsidwa ntchito kwambiri mu:
- ma valve a ma hydraulic circuits
- mapampu a mankhwala
- makina opangira jekeseni
- zomatira kugawira mavavu
- makina osindikizira
- zida zamakina
- mankhwala
- makina aulimi
PEEK zosunga zobwezeretsera mphete
PEEK ingagwiritsidwe ntchito pazovuta mpaka 20,000 psi komanso kutentha kwakukulu kwa 500 ° F.Izi zimapangitsa kuti PEEK ikhale yabwino pakugwiritsa ntchito kuthamanga kwambiri komanso kutentha kwambiri.PEEK imapezekanso yodzazidwa kuti muwonjezere mphamvu ndi kuuma.PEEK imagwirizana kwambiri ndi mankhwala osiyanasiyana, kuphatikiza zotsukira, ndipo imakhala ndi mikangano yochepa.
Nayiloni zosunga zobwezeretsera mphete
Nayiloni 6,6imagwira ntchito bwino pamitsempha yomwe ili pansi pa 10,000 psi ndi kutentha kwakukulu kwa 186 ° F.Nayiloni imagwira ntchito bwino pakugwiritsa ntchito kuthamanga kwambiri koma imakhala yochepa potengera kutentha.Nylon 6,6 yodzazidwa ndi Molybdenum Disulfide (MoS2) kuti muchepetse mikangano imagwiritsidwa ntchito popanga mphete zosunga zobwezeretsera.Chimodzi mwazovuta za Nylon 6,6 ndi kuyamwa kwake kwamadzi, komwe kumatha kuchoka pa 0.5% mpaka 1.4% pa maola 24.
PTFE zosunga zobwezeretsera mphete
PTFE yodzaza (magalasi odzazidwa, kaboni, graphite yodzazidwa, mkuwa)imagwira ntchito ndi zokakamiza mpaka 5,800 psi, komabe namwali PTFE amangokhala pafupifupi 3,600 psi.Virgin PTFE, chifukwa chake, imakhala yocheperako komanso yapakatikati pomwe PTFE yodzazidwa imagwira ntchito pamapulogalamu ambiri apakatikati mpaka apamwamba.The pazipita ntchito kutentha kwa PTFE ndi mozungulira 575 ° F, zomwe zimapangitsa kukhala abwino kwa otsika kuthamanga, mkulu kutentha ntchito.PTFE imalimbana ndi mankhwala ndipo imakhala ndi mikangano yochepa kwambiri.
Mapeto
Pankhani ya mphete zosunga zobwezeretsera, PTFE imagwira ntchito bwino pamapulogalamu otsika mpaka apakatikati koma imathanso kuthana ndi kutentha kwambiri.Nayiloni imatha kugwira ntchito zapakatikati mpaka zothamanga kwambiri koma imakhala yochepa chifukwa cha kutentha komanso kuyamwa kwamadzi.Zikafika pazosunga zosunga zobwezeretsera, PEEK imatha kuthana ndi zovuta komanso kutentha kwambiri.Kumbukirani kuti PEEK ndi PTFE ndizofanana zikafika pakukangana kochepa komanso kuyanjana kwamankhwala, zonse zomwe ndizofunikira pakusindikiza ntchito.
Nthawi yotumiza: Apr-14-2017