Kev sib piv cov qauv thiab kev teeb tsa cov lus qhia rau PTFE V-Nplhaib ntim thiab cov foob sib xyaw
Tso lus
Ntawm no yog ib qho kev txhais lus Askiv zoo nrog cov lus qhia tseeb thiab cov lus hais txog engineering:
PTFE V-Nplhaib Vs PTFE Composite Foob rau Reciprocating Sealing Applications
Feem ntau piv yog ob lub sealing qauv siv feem ntau nyob rau hauv reciprocating sealing tshuab:
PTFE V-ring packing (Chevron / V-packing set) thiab PTFE composite seals (PTFE slipper seal with elastomer O-ring energizer). Ob leeg yog siv nyob rau hauv dynamic sealing, tab sis lawv tsim, ua hauj lwm cov hauv paus ntsiab lus thiab installation yuav tsum tau sib txawv heev.
1. Kev sib piv ntawm cov qauv
A. PTFE V-Ring Packing (Chevron / V-Packing Set)
PTFE V- lub nplhaib ntim khoom feem ntau muaj ntau pawg V- zoo li lub nplhaib uas yog axially compressed hauv lub thawv ntim khoom. Kev teeb tsa ib txwm yog:
Txiv neej adapter nplhaib (header nplhaib / siab sab)
Ob peb Chevron V-rings (intermediate sealing rings)
Poj niam adapter nplhaib (gland nplhaib / compression nplhaib)
Lub nplhaib siab, txhawb lub nplhaib lossis lub nplhaib tiv thaiv extrusion (yeem)
Lub rooj sib dhos tuaj yeem muab cov nplhaib siab, V-cov nplhaib sib khi thiab cov nplhaib txhawb nqa, raws li qhov xav tau los ntawm kev ua haujlwm, raws li Freudenberg V- ntim khoom.
Txoj cai ntawm kev ua haujlwm:
Lub caj pas yog axially compressed los muab thawj sealing quab yuam.
Lub kaw lus siab ntxiv dag zog rau daim di ncauj sealing, ua rau muaj kev sib cuag nrog kev ntxhov siab (tus kheej- ua kom muaj zog).
Cov yam ntxwv tseem ceeb:
Re- kho tau: lub caj pas tuaj yeem rov kho kom rov qab ua haujlwm sealing.
Cov qauv tsim muaj zog rau hnyav- daim ntawv thov lub luag haujlwm thiab thaum xav tau kev sib raug zoo.
Nws yog feem ntau ua haujlwm hauv cov cuab yeej cuab tam qub thiab nyob rau hauv cov xwm txheej ua haujlwm hnyav.
Txoj cai ntawm tus ntiv tes xoo rau installation:
V-groove, siab sab.
B. PTFE Composite Foob (PTFE Sliding Ring + O-Nplhaib Energizer)
PTFE composite foob feem ntau yog ua los ntawm:
PTFE sealing nplhaib (slipper foob / swb nplhaib)
Ib qho elastomer O-ntiv nplhaib ua lub zog muaj zog / lub ntsiab lus preload
Kev xaiv rov qab -ntiv nplhaib tawm tsam extrusion.
Lub nplhaib PTFE swb nyob rau hauv tandem nrog ib tug elastomer O- nplhaib nyob rau hauv lub Parker Slipper Seal® tshuab ua lub sealing muaj nuj nqi raws li tau teev tseg.
Txoj cai ntawm kev ua haujlwm:
Lub nplhaib O- muab thawj zaug radial preload los lav kev sib khi ntawm xoom lossis qis qis.
Nyob rau hauv siab lub nplhaib PTFE yog nias tawm tsam mating nto thiab yog li txhim kho cov sealing kev ua tau zoo.
Cov yam ntxwv tseem ceeb:
Kev sib txhuam tsawg dua V-ring packing.
Ntau dynamical motion systems thiab kev ua tau zoo dua hauv kev nrawm dua.
Ntau rhiab heev rau groove geometry thiab extrusion qhov khoob thiab sib dhos.
Feem ntau tsis rov- kho tau. Hloov chaw rov- zawm, ib txwm hnav cov ntsaws ruaj ruaj yog hloov.
C. Cov lus sib piv ceev
Yam khoom PTFE V-Ring Packing (Chevron) PTFE Composite Foob (PTFE + O nplhaib)
Qauv Ntau V-rings + adapters + xaiv kev txhawb nqa PTFE zawv zawg nplhaib + elastomer O- nplhaib (energizer)
Txoj kev preloading Axial compression ntawm caj pas Radial energisation ntawm O-ring
Adjustability Re-tightenable los them nyiaj rau hnav Tsis kho, ruaj zawj tsim
Kev taw qhia siab Feem ntau yog ib qho kev taw qhia (lossis ob pawg hauv ib kab) Feem ntau ib leeg -kev taw qhia
Kev sib txhuam siab dua vim muaj ntau daim di ncauj sealing qis qis, zoo dua rau kev txav mus los
Tolerance rau misalignmenthigh kam rau ua, toughAlignment / clearance rhiab heev
Daim ntawv thov Hnyav -lub luag haujlwm, tsis tshua muaj ceev, cov khoom siv tsis tu ncua High ceev tsis tshua muaj kev sib txhuam hydraulic systems
2. Installation Instructions of PTFE V-Ring Packing 2.1 Kev tshuaj xyuas thiab kev npaj ua ntej kev teeb tsa
Ua ntej installation:
Ua kom huv lub thawv ntim khoom, tshem tawm tag nrho cov av, xeb thiab burrs.
Tshawb xyuas cov qhab nia, khawb lossis hnav ntawm tus pas nrig lossis lub tog raj kheej nto.
Ua kom qhov zawj ncaj ncees yog qhov qub thiab raug chamfered.
Cov hmoov txhuas zoo- nyob rau hauv chamfer yog tsim nyog los tiv thaiv daim di ncauj puas los yog inversion thaum lub installation.
Siv lub teeb lubrication sib xws nrog cov txheej txheem xov xwm kom txo tau kev sib txhuam thiab tiv thaiv kev puas tsuaj thaum sib dhos.
2.2 Orientation thiab Sequence of Installation
Tau txais txoj kev taw qhia yog qhov tseem ceeb:
V-groove yuav tsum nyob rau sab siab.
Hom kev txiav txim siab (siab sab rau caj pas sab):
txiv neej adapter nplhaib.
Chevron V-rings (stacked foob rings)
Adapter nplhaib Poj niam
Ob leeg Freudenberg thiab Garlock kev ntxhov siab kom haum rau qhov nruab nrab siab.
2.3 Butt-Kev sib koom ua ke (Split Rings)
Rau kev sib cais nplhaib tsim:
Cov pob qij txha uas nyob ib sab yog staggered kom tsis txhob muaj cov dej xau.
Freudenberg qhia txog kev sib koom ua ke ntawm ib ncig ntawm 120℃.
Garlock feem ntau qhia qhov tsawg kawg nkaus ntawm 90℃offset.
Txoj kev staggering kom zoo tiv thaiv cov kev xau los ntawm kev sib raug zoo.
2.4 Compression Kho thiab Tswj
Ib qho laj thawj loj ntawm kev ua tsis tiav yog compression ntau dhau.
Cov lus qhia tseem ceeb:
Kho qhov pib lub teeb compression kom txog thaum lub ntim ntim.
Kuaj khiav ntawm lub siab qis ua ntej kev hloov kho zaum kawg.
Yog tias muaj dej ntws, maj mam maj mam, me ntsis ntawm ib lub sijhawm.
Uniformly nruj lub caj pas bolts kom tiv thaiv kev thauj khoom tsis sib xws.
Compression ntau dhau tuaj yeem ua rau:
Ua kom muaj kev sib txhuam thiab kub ntau lawm
Lov -slip phenomenon
Kev hnav ntau dua ntawm cov pas nrig
Ob leeg Freudenberg thiab Garlock taw qhia txog kev tswj hwm, kev hloov kho zuj zus thiab tsis nruj heev.
3. Cov lus qhia kev txhim kho rau PTFE Composite Seals (PTFE + O-Nplhaib)
3.1. Kev npaj rau kev teeb tsa
Xyuas kom qhov zawj yog huv si, qhuav thiab tsis muaj kuab paug.
Tsim nyog chamfer ntawm groove nkag mus rau kev txheeb xyuas.
Npog cov npoo ntse, cov chaw nres nkoj, qhov tseem ceeb, thiab cov xov xov nrog cov ntaub nplaum tiv thaiv los yog lub tes tsho.
Parker qhia kom thaiv cov peev txheej txiav kom tsis txhob muaj kev puas tsuaj rau lub foob thaum lub sijhawm teeb tsa.
Hloov cov cuab yeej hlau, cov khoom siv tsim nyog xws li lub tes tsho nthuav dav yuav tsum tau siv kom tsis txhob muaj kev puas tsuaj PTFE.
3.2 Cov txheej txheem tseem ceeb ntawm kev teeb tsa
Kev teeb tsa lub ntsiab lus ntawm Parker Slipper Seal® yog:
Pib los ntawm kev ntxig lub elastomer O-ntiv nplhaib rau hauv qhov zawj.
Siv cov cuab yeej nthuav dav rau nruab PTFE sealing nplhaib.
Yog hais tias deformation tau tshwm sim, siv lub tes tsho resizing (burnishing) kom rov ua kom rov qab.
Daim ntawv tseem ceeb:
Tsis txhob sib npaug ntawm lub nplhaib PTFE
Tsis yog -cov khaub ncaws ncab tuaj yeem ua rau tsis tuaj yeem deformation thiab ua tsis tiav ntxov.
Feem ntau cov xau thaum ntxov yog tshwm sim los ntawm kev nthuav dav tsis raug yam tsis muaj rov- rov qab.
3.3 Directional Alignment
Geometries txawv los ntawm cov chaw tsim khoom:
Lub sealing di ncauj los yog qhib sab ntawm lub nplhaib PTFE yuav tsum nyob rau sab siab.
Qhov no ua kom lub siab- pab ua kom daim di ncauj ntawm qhov chaw mating.
Ib txwm siv cov cim chaw tsim khoom lossis chamfers txhawm rau txheeb xyuas qhov kev taw qhia kom raug.
4. Kev teeb tsa tsis raug
A. Ua tsis tiav ntawm PTFE V-Nplhaib Ntim
Tsis raug (V-groove tsis tig rau sab siab) orientation → instantaneous los yog maj mam to
Kev sib koom ua ke tsis zoo → tsim kom muaj txoj hauv kev xau ncaj qha
Tshaj - compression → overheating, stick- plam, puas rau ncej
Dip twisting los yog inversion thaum ntxov tsis ua hauj lwm
B. Ua tsis tiav ntawm PTFE Composite Seals
O-ring twist los yog foob tsis ua hauj lwm → Siv PTFE nplhaib ua ntej O- nplhaib (tshwj xeeb tshaj yog nyob rau hauv nruj grooves)
Sharp edges not protected ->PTFE nplhaib txiav thaum lub sij hawm installation.
Irregular lossis tshaj - nthuav dav ntawm PTFE → mus tas li deformation thiab thaum ntxov to
Poob ntawm sealing kev ncaj ncees → Ua tsis tiav rov-loj tom qab nthuav
Cov ntsiab lus no tseem tuaj yeem tsim kho ntxiv rau hauv, yog tias xav tau:
Daim ntawv qhia-style piv ntawm ...
Phau ntawv qhia txog kev tu pab pawg
Los yog ib daim ntawv teev kev teeb tsa yooj yim dua
