Izangqa ezigciniweyo, ezikwabizwa ngokuba zii-anti-extrusion rings ze-BURs, zenza kanye le nto ithethwa yigama labo: zisebenza njengenkxaso yokuxhasa iindibano zokutywina.
Kukho izinto ezininzi ezahlukeneyo ezisetyenziselwa ukwenza imisesane yokugcina, kubandakanya zombini iipolymers kunye neeelastomers.Ezona zixhaphakileyo iipholima zeringi zogcino yi-PEEK, inayiloni, kunye ne-PTFE.Ukugqiba ukuba yeyiphi imathiriyeli enokusetyenziswa ngokuqhelekileyo isekelwe kuxinzelelo kunye neemfuno zobushushu.
Kule posi yebhlog, siza kuphonononga injongo kunye nokusetyenziswa kweringi zogcino, emva koko sixoxe ngoluhlu loxinzelelo kunye nobushushu obufanele iPEEK, inayiloni, kunye ne-PTFE.Injongo ye-Backup Rings
Umsesane ogciniweyo owenziwe ngokufanelekileyo obekwe phakathi kwe-o-ring kunye ne-gap yokucoca inokuthintela i-o-ring seal ekuphumeni kwi-gap ngelixa inikezela zombini inkxaso kunye nokukhusela kwi-o-ring.Basebenza kakuhle kwiimeko apho kukho i-gap enkulu ye-extrusion, ukushisa okuphezulu, okanye uxinzelelo oluphezulu.Izangqa ezigciniweyo ziqhele ukusetyenziswa kwi:
- iivalve zeesekethe zehydraulic
- iimpompo zekhemikhali
- oomatshini bokubumba inaliti
- iivalve ezincamathelayo zokukhupha
- oomatshini bokushicilela
- izixhobo zoomatshini
- amayeza
- oomatshini bezolimo
PEEK Backup Irings
I-PEEK ingasetyenziswa kuxinzelelo ukuya kuma-20,000 psi kunye nobushushu obuphezulu be-500 ° F.Oku kwenza i-PEEK ilungele uxinzelelo oluphezulu kunye nezicelo zobushushu obuphezulu.I-PEEK ikwafumaneka izaliswe ukongezelela ukomelela kunye nobulukhuni.I-PEEK iyahambelana neendidi ngeendidi zeekhemikhali, kubandakanywa iikhompawundi zokucoca, kwaye inokhuhlane oluphantsi.
Izangqa zeNayiloni ezigciniweyo
Inayiloni 6,6isebenza kakuhle kuxinzelelo olungaphantsi kwe-10,000 psi kunye nobushushu obukhulu be-186 ° F.Inayiloni isebenza kakuhle kwizicelo zoxinzelelo oluphezulu kodwa ilinganiselwe ngokumalunga nobushushu.Inayiloni i-6,6 egcwele i-Molybdenum Disulfide (i-MoS2) ukunciphisa i-friction isetyenziswa ngokuqhelekileyo kwiindandatho zokugcina.Enye yeengxaki zeNayiloni 6,6 kukufunxa kwayo amanzi, anokuqala ukusuka kwi-0.5% ukuya kwi-1.4% kwiiyure ezingama-24.
PTFE Backup Irings
I-PTFE egcwalisiweyo (iglasi egcweleyo, ikhabhoni egcweleyo, igraphite igcwaliswe, ibronze igcwaliswe)isebenza ngoxinzelelo ukuya kwi-5,800 psi, nangona kunjalo i-PTFE enyulu ilinganiselwe malunga ne-3,600 psi.IVirgin PTFE, ke ngoko, ikhawulelwe kwizicelo zoxinzelelo oluphantsi kunye noluphakathi ngelixa i-PTFE egcwalisiweyo isebenza uninzi oluphakathi ukuya kwizicelo zoxinzelelo oluphezulu.Ubushushu bokusebenza obuphezulu be-PTFE bujikeleze i-575 ° F, eyenza ilungele uxinzelelo oluphantsi, izicelo zobushushu obuphezulu.I-PTFE ixhathisa kakhulu kwikhemikhali kwaye inokruxulwano oluphantsi kakhulu.
Ukuqukumbela
Xa kuziwa kumakhonkco okugcina, i-PTFE isebenza kakuhle kwizicelo zoxinzelelo oluphantsi ukuya phakathi kodwa inokuphatha amaqondo obushushu aphezulu.Inayiloni inokusingatha usetyenziso oluphakathi ukuya kophezulu kodwa inqanyulwe ngokusebenza kobushushu kunye nokufunxwa kwamanzi.Xa kufikwa kwizinto ezigcina i-ring ring, i-PEEK inokumelana noxinzelelo oluphezulu kunye namaqondo obushushu aphezulu.Gcina ukhumbula ukuba i-PEEK kunye ne-PTFE ziyathelekiseka xa kufikwa kwingxabano ephantsi kunye nokuhambelana kweekhemikhali, zombini zibalulekile ekutywineni izicelo.
Ixesha lokuposa: Apr-14-2017