Li-backup rings, tse tsejoang hape e le li-anti-extrusion rings tsa BURs, li etsa hantle seo lebitso la tsona le se bolelang: li sebetsa joalo ka tšehetso ea ho tiisa likopano.
Ho na le lisebelisoa tse 'maloa tse fapaneng tse sebelisetsoang ho etsa mehele ea ho boloka, ho kenyelletsa le li-polymer le li-elastomers.Li-polymer tse atileng haholo bakeng sa mehele ea bekapo ke PEEK, Nylon, le PTFE.Ho etsa qeto ea hore na ke lisebelisoa life tse tla sebelisoa hangata ho ipapisitse le khatello le litlhoko tsa mocheso.
Ka poso ena ea blog, re tla hlahloba sepheo le ts'ebeliso ea li-backups, ebe re buisana ka mefuta ea khatello le mocheso tseo PEEK, Nylon, le PTFE li lokeloang ke tsona.Morero oa Backup Rings
Lesale la bekapo le entsoeng ka nepo le behiloeng lipakeng tsa o-ring le lekhalo la ho hlakola le ka thibela tiiso ea o-ring hore e se ke ea fetela ka har'a lekhalo ha e ntse e fana ka tšehetso le ts'ireletso ho o-ring.Li sebetsa hantle maemong ao ho nang le lekhalo le leholo la extrusion, mocheso o phahameng, kapa likhatello tse phahameng.Li-backup rings li sebelisoa hangata ho:
- li-valve bakeng sa lipotoloho tsa hydraulic
- lipompo tsa lik'hemik'hale
- metjhini e bopang ka ente
- li-valve tsa ho fana ka sekhomaretsi
- mechine ea khatiso
- lisebelisoa tsa mochini
- meriana
- mechine ea temo
PEEK bekapo mehele
PEEK e ka sebelisoa ka likhatello tse fihlang ho 20,000 psi le mocheso o phahameng oa 500 ° F.Sena se etsa hore PEEK e be e loketseng khatello e phahameng le lits'ebetso tsa mocheso o phahameng.PEEK e fumaneha hape e tlatsitsoe bakeng sa ho eketsa matla le boima.PEEK e lumellana hantle le mefuta e fapaneng ea lik'hemik'hale, ho kenyelletsa le metsoako ea ho hloekisa, 'me e na le likhohlano tse tlase.
Mehele ea Backup ea Nylon
Nylon 6,6e sebetsa hantle ka likhatello tse ka tlase ho 10,000 psi le mocheso o phahameng oa 186 ° F.Nylon e sebetsa hantle bakeng sa lits'ebetso tsa khatello e phahameng empa e lekanyelitsoe haholo mabapi le mocheso.Nylon 6,6 e tletseng Molybdenum Disulfide (MoS2) ho fokotsa khohlano e atisa ho sebelisoa bakeng sa mehele ea ho boloka.E 'ngoe ea litšitiso tsa Nylon 6,6 ke ho monya ha eona metsi, ho ka tloha ho 0.5% ho isa ho 1.4% ka lihora tse 24.
PTFE bekapo mehele
PTFE e tlatsitsoeng (galase e tlatsitsoe, khabone e tlatsitsoe, graphite e tlatsitsoe, boronse e tlatsitsoe)e sebetsa ka likhatello ho fihlela ho 5,800 psi, leha ho le joalo PTFE ea moroetsana e lekanyelitsoe ho hoo e ka bang 3,600 psi.Virgin PTFE, ka hona, e lekanyelitsoe lits'ebetsong tsa khatello e tlase le e mahareng ha PTFE e tlatsitsoeng e sebetsa bakeng sa likopo tse ngata tse mahareng ho isa ho tse phahameng.Mocheso o phahameng oa ts'ebetso oa PTFE o pota-potile 575 ° F, e leng se etsang hore e be se loketseng bakeng sa khatello e tlaase, lits'ebetso tse phahameng tsa mocheso.PTFE e hanyetsana haholo le lik'hemik'hale 'me e na le khohlano e tlase haholo.
Qetello
Ha ho tluoa tabeng ea li-rings tsa bekapo, PTFE e sebetsa hantle bakeng sa lits'ebetso tsa khatello e tlase ho isa bohareng empa e ka sebetsana le mocheso o phahameng.Nylon e khona ho sebetsana le lits'ebetso tse mahareng ho isa ho tse phahameng empa e lekanyelitsoe ke mocheso o sebetsang le ho monya metsi.Ha ho tluoa tabeng ea lisebelisoa tsa li-ring ring, PEEK e khona ho sebetsana le likhatello tse phahameng ka ho fetisisa le mocheso o phahameng haholo.Hopola hore PEEK le PTFE lia bapisoa ha ho tluoa tabeng ea khohlano e tlase le tšebelisano ea lik'hemik'hale, tseo ka bobeli li leng bohlokoa ho tiiseng lits'ebetso.
Nako ea poso: Apr-14-2017