Izindandatho eziyisipele, ezaziwa nangokuthi izindandatho ze-anti-extrusion zama-BUR, zenza lokho kanye okushiwo igama lazo: zisebenza njengokweseka ukuhlanganisa ukuhlanganisa.
Kunezinto eziningana ezahlukene ezisetshenziselwa ukwenza izindandatho eziyisipele, okuhlanganisa kokubili ama-polymers nama-elastomer.Ama-polymer ajwayeleke kakhulu ezindandeni eziyisipele yi-PEEK, Inayiloni, ne-PTFE.Ukunquma ukuthi iyiphi impahla okufanele isetshenziswe ngokuvamile kusekelwe ezidingweni zengcindezi nezinga lokushisa.
Kulokhu okuthunyelwe kwebhulogi, sizobuyekeza inhloso nokusetshenziswa kwezindandatho ezigcina ikhophi yasenqolobaneni, bese sixoxa ngebanga lokucindezela nezinga lokushisa i-PEEK, Inayiloni, ne-PTFE okuyifanele.Inhloso Yezindandatho Eziyisipele
Indandatho yokusekelayo eklanywe kahle ebekwe phakathi kwe-o-ring kanye negebe lokusula ingavimbela uphawu lwe-o-ring ukuthi lungaphumeleli esikhaleni kuyilapho inikeza kokubili ukusekelwa nesivikelo ku-o-ring.Basebenza kahle ezimweni lapho kukhona igebe elikhulu le-extrusion, izinga lokushisa eliphezulu, noma izingcindezi eziphezulu.Izindandatho eziyisipele zivame ukusetshenziswa ku:
- ama-valve we-hydraulic circuits
- amaphampu amakhemikhali
- imishini yokubumba umjovo
- ama-valve anamathelayo wokusabalalisa
- imishini yokunyathelisa
- amathuluzi omshini
- ezemithi
- imishini yezolimo
PEEK Isipele Izindandatho
I-PEEK ingasetshenziswa ezingcindezini ezifika ku-20,000 psi kanye nezinga lokushisa eliphakeme elingu-500°F.Lokhu kwenza i-PEEK ilungele ukucindezela okuphezulu nezinga lokushisa eliphezulu izicelo.I-PEEK iyatholakala futhi igcwaliswe ukuze kungezwe amandla nobulukhuni.I-PEEK ihambisana kakhulu nezinhlobonhlobo zamakhemikhali, okuhlanganisa izinhlanganisela zokuhlanza, futhi inokungqubuzana okuphansi.
Izindandatho zesipele senayiloni
Inayiloni 6,6isebenza kahle ezingcindezini ezingaphansi kuka-10,000 psi kanye nezinga lokushisa eliphakeme elingu-186°F.Inayiloni isebenza kahle ekufakweni kwengcindezi ephezulu kodwa ilinganiselwe ngokuphathelene nezinga lokushisa.Inayiloni engu-6,6 egcwele i-Molybdenum Disulfide (MoS2) ukuze kuncishiswe ukungqubuzana ivame ukusetshenziselwa izindandatho eziyisipele.Enye yezingqinamba zeNyiloni 6,6 ukumunca kwayo amanzi, okungasukela ku-0.5% kuye ku-1.4% ngamahora angama-24.
PTFE Backup Izindandatho
I-PTFE egcwele (ingilazi egcwele, i-carbon egcwele, i-graphite egcwele, i-bronze egcwele)isebenza nezingcindezi ezifika ku-5,800 psi, nokho i-PTFE emsulwa ikhawulelwe ku-3,600 psi.Ngakho-ke, i-Virgin PTFE, ikhawulelwe kuzinhlelo zokusebenza zengcindezi ephansi nephakathi ngenkathi i-PTFE egcwalisiwe isebenza kwezinhlelo eziningi zokucindezela okuphakathi nendawo ukuya kophezulu.Izinga lokushisa eliphezulu lokusebenza le-PTFE lizungeze u-575°F, okuyenza ilungele ukucindezela okuphansi, izinhlelo zokusebenza zokushisa okuphezulu.I-PTFE imelana kakhulu namakhemikhali futhi inokungqubuzana okuphansi kakhulu.
Isiphetho
Uma kuziwa emasongweni ekhophi yasenqolobaneni, i-PTFE isebenza kahle kuzinhlelo zokusebenza zengcindezi ephansi kuya emaphakathi kodwa futhi ingaphatha amazinga okushisa aphezulu.Inayiloni ingakwazi ukuphatha izinhlelo zokusebenza ezinomfutho ophakathi nendawo ukuya kophezulu kodwa inqunyelwe izinga lokushisa lokusebenza nokumuncwa kwamanzi.Uma kuziwa ezintweni ezigcina ikhophi yendandatho, i-PEEK ingakwazi ukuphatha izingcindezi eziphakeme kakhulu namazinga okushisa aphezulu.Khumbula ukuthi i-PEEK ne-PTFE ziyaqhathaniswa uma kukhulunywa ngokungqubuzana okuphansi nokuhambisana kwamakhemikhali, kokubili okubalulekile ekuvaleni izinhlelo zokusebenza.
Isikhathi sokuthumela: Apr-14-2017