Xaiv cov khoom ntim PTFE sealing (iav Fiber / Carbon Fiber / Graphite / Bronze) thiab cov ntawv thov

Nov yog kev txhais lus Askiv zoo nrog cov lus qhia tsim nyog thiab lub suab zoo nkauj:

Daim ntawv thov sealing - Kev xaiv foob raws li kev ua haujlwm thiab cov ntaub ntawv PTFE puv
1. Kev xaiv cov ntsaws ruaj ruaj raws li tsib qhov kev ua haujlwm tseem ceeb
Thawj kauj ruam hauv kev xaiv lub foob yog txhawm rau ntsuas tsib yam kev ua haujlwm yooj yim:

1. Hom kev txav
Reciprocating motion / rotational motion / static sealing
Cov khoom sib txuam thiab polishing nto yog qhov tseem ceeb hauv daim ntawv thov teb raws li lawv tshwj xeeb rau kev hnav khaub ncaws thiab tsim cov khoom abrasive.

2. Tus nqi ntawm PV thiab Extrusion Gap
Kev kub siab, loj extrusion khoob thiab ua ke ntawm ob qho tib si, tsa lub extrusion thiab txias txaus deformation txaus ntshai heev.
Hauv cov xwm txheej zoo li no, kev nyiam yuav tsum tau muab rau cov ntaub ntawv uas muaj kev tiv thaiv siab -extrusion thiab creep resistance.

3. Hardness thiab Counterface khoom
Qis hardness shafts, lub tog raj kheej los yog lub rooj zaum valve yog feem ntau ua rau abrasive hnav los ntawm cov khoom ntim PTFE.
Yog li ntawd, kev sib piv cov khoom yuav tsum yog kev lag luam - tawm ntawm kev hnav tsis kam thiab tiv thaiv counterface.

4. Tshuaj Compatibility ntawm nruab nrab
Corrosive media xws li muaj zog alkalis lossis hydrofluoric acid (HF) tuaj yeem muaj kev cuam tshuam loj rau qhov tsim nyog ntawm cov khoom siv thiab ntev -kev ruaj ntseg.
Nyob rau hauv cov xwm txheej hnyav, tshuaj tiv thaiv yog ib qho kev xaiv loj.

5. Ncua-kev coj tus cwj pwm plam thiab kev sib txhuam rhiab heev
Tsis tshua muaj kev sib txhuam thiab txhim khu kev qha kev coj cwj pwm yog feem ntau yuav tsum tau nyob rau hauv qis ceev reciprocating systems thiab servo hydraulic daim ntaub ntawv.
Nyob rau hauv cov xwm txheej zoo li no, nws yog ib qho tseem ceeb kom txo tus pas - plam (crawling).

Creep, hnav, tshuaj tiv thaiv, conductivity thiab thermal conductivity yog cov yam ntxwv ntawm kev xaiv engineering foob raws li.

2. Plaub yam uas nquag siv PTFE cov ntaub ntawv: Cov khoom thiab kev siv
Qhov kev sib piv no yog qhov zoo rau cov qauv kev lag luam dav dav. Qhov kev ua tau zoo tiag tiag yog nyob ntawm hom muab tub lim, morphology (fibre lossis hmoov), concentration, txheej txheem sintering thiab kev tsim khoom zoo.

2.1 PTFE ntim nrog iav
Cov txiaj ntsig tseem ceeb:

Txo kev nkag tau zoo heev (txias- ntws)

Txhim khu kev tiv thaiv hnav thiab compressive zog

Feem ntau siv los ua ib qho kev txhawb nqa dav dav

Cov kev txwv loj:

Kev txhoj puab heev ntawm mating nto, tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov teb

Tsis zoo compatibility nrog HF thiab muaj zog alkalis

Kev siv sealing zoo

Reciprocating seals rau hydraulic thiab pneumatic siv

Anti-extrusion rings thiab rov qab-ntiv nplhaib.

Hnav rings / coj rings

Cov yam ntxwv sealing (xws li lub rooj zaum valve)

Nyob rau hauv kev xaiv:
Cov iav ntim PTFE yog cov khoom siv zoo tshaj plaws rau kev kub siab reciprocating tshuab qhov chaw ruaj khov thiab nkag siab yog qhov tseem ceeb. Tab sis qhov no feem ntau tsis xav tau nyob rau hauv daim ntawv thov kev sib hloov nrog cov shafts mos vim nws cov cim abrasive.

2.2 PTFE gefüllt mit Kohlenstoff / Carbon -Graphit
PTFE ntim nrog cov pa roj carbon monoxide yog txhua qhov system nrog carbon hmoov, carbon fiber los yog carbon -graphite mixes. Cov lus yuav tsum raug txheeb xyuas thaum lub sijhawm xaiv.

Cov txiaj ntsig tseem ceeb yog:

Txo creep thiab hardens.

Txhim kho thermal conductivity

Cov khoom zoo qhuav qhuav ntawm cov pa roj carbon-graphite sib tov

Muaj peev xwm confer anti-static (hluav taws xob conductive) yam ntxwv

Cov txiaj ntsig tshwj xeeb ntawm carbon fiber:

Kev txhim kho zoo sib xws hauv creep kuj zoo li iav fiber ntau tab sis feem ntau nrog qis loading »

Haum rau alkaline thiab hydrofluoric acid tej yam kev mob uas iav fiber ntau tsis haum

Txhim kho hnav tsis kam nyob rau hauv dej lubricated xwm txheej

Cov ntawv thov sealing yog:

Pneumatic foob

Qhuav los yog ciam lubrication reciprocating seals

Rings thiab coj strips rau hnav

Dynamic sealing qhov chaw ntawm kev sib txhuam qis

Kev txwv

Kev ua tau zoo yuav raug kev txom nyem hauv cov xwm txheej oxidizing siab.

Conductivity tej zaum yuav muaj kev puas tsuaj nyob rau hauv daim ntawv thov hluav taws xob rwb thaiv tsev.

Daim ntawv xaiv:
Cov pa roj carbon-graphite systems tau txais kev pom zoo nyob rau hauv qis -lubrication los yog qhuav- tej yam kev mob, qhov uas tsis muaj hnav thiab tswj deformation yog xav tau. Hauv cov tshuaj lom neeg los yog dej -lubricated systems, carbon fiber lwm txoj kev nyiam.

2.3 PTFE puv nrog Graphite
Cov txiaj ntsig tseem ceeb:

Tsawg heev COF (coefficient ntawm kev sib txhuam)

Soft counterface cov ntaub ntawv maj mam

Cov tshuaj tiv thaiv siab

Zoo rau nruab nrab mus rau siab loads thiab ceev

Cov ntawv thov rau sealing:

Low Speed ​​Reciprocating Systems nrog Anti-Stick-Slip Performance (xws li servo-hydraulics, precision cylinders)

Tsis yog -lubricated rotary ncej ntsaws ruaj ruaj nrog shafts hloov tau

Sealing daim ntaub ntawv rau corrosive media (twj, li qub, rotating machinery)

Caij nplooj ntoos hlav foob tsho energize foob tshuab

Kev txwv:

Kev ua tau zoo yuav raug degraded nyob rau hauv cov huab cua qhuav heev

Nyob rau hauv dej -lubricated tej yam kev mob, carbon- graphite los yog carbon fiber composites yuav muaj ntau dua hnav tsis kam.

Daim ntawv xaiv:
Graphite puv PTFE yog qhov tsim nyog rau cov ntawv thov uas yuav tsum muaj kev sib txhuam tsis tshua muaj kev sib txhuam thiab kev sib raug zoo nrog cov khoom muag muag, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig hnyav.

2.4 PTFE nrog bronze filling
Bronze sau PTFE feem ntau muaj 40% txog 60% tooj liab.

Cov txiaj ntsig tseem ceeb:

Zoo heev tiv thaiv -extrusion zog

High load nqa peev xwm

Txhim kho thermal conductivity thiab kub dissipation

Tsis kam mus creep nyob rau hauv siab siab

Cov ntawv thov rau sealing yog:

Piston thiab pas nrig ntsaws ruaj ruaj nyob rau hauv siab hydraulic siab

Rov qab-ntiv nplhaib, tiv thaiv-extrusion

Qhia cov nplhaib thiab hnav strips nyob rau hauv cov xwm txheej PV siab

Heavy luag rotating los yog zawv zawg seals

Kev txwv:

Kev txwv tshuaj sib raug zoo nrog qee qhov nruab nrab (qee yam tshuaj tuaj yeem tua bronze)

Tsis haum rau hluav taws xob insulating lub hom phiaj

Mating cov ntaub ntawv yuav tsum tau xaiv kom zoo zoo kom tsis txhob muaj teeb meem compatibility.

Nco ntsoov xaiv:
Bronze puv PTFE yog cov khoom siv rau kev kub siab tshuab qhov twg extrusion kuj yog thawj qhov kev xav. Tsis haum rau kev siv tshuaj hnyav lossis hluav taws xob rhiab heev.

3. Phau ntawv qhia kev xaiv cov khoom ceev rau cov khoom siv
Anti-extrusion / rov qab- nce rings (siab siab, qhov khoob loj)
Bronze- puv PTFE yog qhov zoo dua. iav - puv yog siv nyob ntawm seb cov tshuaj lom neeg.

Dynamic seals rau hydraulic pas nrig / piston (universal siab siab):
siv feem ntau puv bronze
Low friction or soft shaft systems ->xaiv graphite lossis carbon -graphite

Pneumatic seals (qhuav los yog tsis muaj lubrication):
Carbon filling los yog carbon graphite tshuab nyiam

Cov txee muag muag-ntsej muag qis hnav:
Qhov zoo tshaj plaws: Graphite impregnated PTFE
Ceev faj thaum siv iav - puv PTFE

Muaj zog alkali lossis hydrofluoric acid (HF) ib puag ncig:
Tsis zoo rau iav fiber ntau, zoo tshaj plaws rau carbon fiber los yog carbon raws tshuab

Cov ntawv no tseem tuaj yeem hloov mus rau hauv ib qho, yog tias tsim nyog:

Cov txheej txheem xaiv tus neeg muag khoom

Technical data sheet

Los yog ntxiv kev cob qhia + cov khoom siv xaiv kev cob qhia rau cov kws ua haujlwm