Backup rings, tseem hu ua anti-extrusion rings ntawm BURs, ua raws nraim li lawv lub npe qhia: lawv ua raws li kev txhawb nqa rov qab rau kev sib khi.
Muaj ntau ntau yam khoom siv los ua cov nplhaib thaub qab, suav nrog ob qho tib si polymers thiab elastomers.Feem ntau cov polymers rau thaub qab rings yog PEEK, Nylon, thiab PTFE.Kev txiav txim siab seb cov khoom siv twg yog feem ntau ua raws li qhov xav tau ntawm lub siab thiab qhov kub thiab txias.
Nyob rau hauv no blog ncej, peb yuav tshuaj xyuas lub hom phiaj thiab daim ntawv thov ntawm thaub qab rings, ces sib tham txog cov ranges ntawm siab thiab kub uas PEEK, Nylon, thiab PTFE yog haum rau.Lub hom phiaj ntawm Backup Rings
Lub nplhaib tsim kom zoo muab tso rau nruab nrab ntawm lub nplhaib o-ntiv nplhaib thiab qhov sib txawv ntawm qhov sib txawv tuaj yeem tiv thaiv lub nplhaib o-ntiv nplhaib los ntawm extruding rau hauv qhov sib txawv thaum muab kev txhawb nqa thiab kev tiv thaiv rau lub nplhaib.Lawv ua haujlwm zoo nyob rau hauv cov xwm txheej uas muaj qhov sib txawv loj extrusion, kub kub, lossis kub siab.Backup rings yog feem ntau siv hauv:
- valve rau hydraulic circuits
- tshuaj twj tso kua mis
- txhaj tshuaj molding tshuab
- adhesive dispensing li qub
- presses
- tshuab cuab yeej
- tshuaj
- tshuab ua liaj ua teb
PEEK Backup Rings
PEEK tuaj yeem siv rau ntawm qhov siab txog 20,000 psi thiab qhov kub siab tshaj plaws ntawm 500 ° F.Qhov no ua rau PEEK zoo tagnrho rau kev siv siab thiab kub kub.PEEK kuj tseem muaj nyob rau hauv kev ntxiv dag zog thiab hardness.PEEK yog sib xws nrog ntau yam tshuaj, suav nrog cov tshuaj ntxuav tes, thiab muaj kev sib txhuam tsawg.
Nylon Backup Rings
Nylon 6,6ua haujlwm zoo ntawm qhov siab tshaj 10,000 psi thiab qhov kub siab tshaj plaws ntawm 186 ° F.Nylon ua haujlwm zoo rau kev siv siab, tab sis kuj txwv tsis pub hais txog qhov kub thiab txias.Nylon 6,6 ntim nrog Molybdenum Disulfide (MoS2) kom txo kev sib txhuam feem ntau yog siv rau cov nplhaib thaub qab.Ib qho ntawm qhov tsis zoo ntawm Nylon 6,6 yog nws qhov nqus dej, uas tuaj yeem muaj li ntawm 0.5% mus rau 1.4% hauv 24 teev.
PTFE thaub qab Rings
Filled PTFE (iav ntim, carbon ntim, graphite puv, bronze puv)ua hauj lwm nrog siab txog li 5,800 psi, txawm li cas los xij PTFE nkauj xwb tsuas yog li ntawm 3,600 psi.Virgin PTFE, yog li ntawd, tsuas yog siv rau kev siv qis thiab nruab nrab siab thaum sau PTFE ua haujlwm rau ntau qhov nruab nrab mus rau qhov siab siab.Qhov siab tshaj plaws kev khiav hauj lwm kub rau PTFE yog nyob ib ncig ntawm 575 ° F, uas ua rau nws zoo tagnrho rau tsis tshua muaj siab, siab kub daim ntaub ntawv.PTFE yog tshuaj tiv thaiv heev thiab muaj kev sib txhuam tsis tshua muaj.
Xaus
Thaum nws los txog rau thaub qab rings, PTFE ua haujlwm zoo rau kev siv qis rau nruab nrab siab tab sis kuj tuaj yeem tswj tau qhov kub thiab txias.Nylon tuaj yeem ua haujlwm nruab nrab rau cov ntawv thov siab, tab sis tsuas yog txwv los ntawm kev ua haujlwm kub thiab dej nqus.Thaum nws los txog rau cov ntaub ntawv thaub qab, PEEK tuaj yeem tswj tau qhov siab tshaj plaws thiab kub kub.Nco ntsoov tias PEEK thiab PTFE yog qhov sib piv thaum nws los txog rau kev sib txhuam qis thiab tshuaj lom neeg sib raug zoo, ob qho tib si tseem ceeb hauv kev siv sealing.
Post lub sij hawm: Apr-14-2017