Khoom Description
Automotive rotating ncej seals
Txawm tias lub tsheb yooj yim tshaj plaws yuav tsum tau muaj ntau yam ntsaws ruaj ruaj, nrog rau kev sib hloov cov ntsaws ruaj ruaj.
Rotary ncej seals
Lub hom phiaj ntawm kev sib hloov lub tog raj kheej yog txhawm rau tiv thaiv kom tsis txhob muaj roj, roj thiab lwm yam kua dej (xws li cov roj kis tau tus mob, cov dej nres, cov cua txias txias) thaum tiv thaiv kev tawm tsam ntawm ib puag ncig. Cov ntsaws ruaj ruaj, qee zaum hu ua roj lossis roj ntsaws ruaj ruaj, yog siv nrog cov kabmob kom khaws cov roj hauv cov kabmob thiab tiv thaiv ib puag ncig kev sib kis (xws li, lubrication retention). Lo lus "spin" yog hais txog lawv lub peev xwm los ua hauv kev sib hloov thiab kev sib hloov.
Qhov twg rotary ncej ntsaws ruaj ruaj yog siv nyob rau hauv kev lag luam automotive
Rotary shaft seals yog ib qho tseem ceeb ntawm ntau yam khoom thiab cov tshuab hauv tsheb, tsheb thauj khoom, tsheb npav, tsheb ua haujlwm thiab kev ua si. EVs (Electric Vehicles) thiab HEVs (Hybrid Electric Vehicles) kuj xav tau cov ntsaws ruaj ruaj. Cov ntsaws ruaj ruaj no kuj siv tau rau ntawm ATVs (Tag nrho cov tsheb thauj neeg).
Qee qhov chaw siv ntau tshaj plaws hauv tsheb thauj mus los yog:
Cua txias compressor
Braking System
Pump
gearbox
kev xa hluav taws xob
lub kauj tsheb
Hauv feem ntau ntawm cov ntawv thov no, kev foob tsis ua haujlwm tuaj yeem ua rau muaj qhov tshwm sim loj, suav nrog kev raug mob ntawm tus kheej, kev puas tsuaj ntawm lub tsheb, thiab kev phom sij rau cov neeg nyob ib puag ncig lub tsheb. Yog li ntawd, nws yog ib qho tseem ceeb kom nrhiav tau qhov zoo-zoo foob rau koj daim ntawv thov.
Automotive foob kev ua haujlwm
Thaum tej yam kev mob rau lub tsheb rotating ncej ntsaws ruaj ruaj sib txawv nyob ntawm seb lawv cov kev thov tshwj xeeb, qhov chaw ua hauj lwm feem ntau muaj xws li; kub heev;
ib puag ncig yam;
Kev vibration thiab shock loads;
muaj kuab paug siab;
tshuaj compatibility
kev sib txhuam qis
Hnav tsis kam
Ua raws li cov qauv kev tsav tsheb
Ib puag ncig yam muaj xws li raug tshav ntuj, ozone, UV rays thiab oxidation, tag nrho cov uas tuaj yeem ua rau lub foob degradation. Cov khoom paug tuaj yeem suav nrog dej, av, roj thiab lwm yam khib nyiab, thaum cov ntsaws ruaj ruaj tuaj yeem raug cov khoom siv xws li roj av, roj hydraulic, cov dej nres, cov dej txias thiab cov kuab tshuaj.
Cov ntaub ntawv siv nyob rau hauv rotary ncej seals
Cov khoom tseem ceeb ntawm lub caij nplooj ntoos hlav-energized foob muaj xws li ib tug saj zawg zog puab sealing di ncauj bonded rau ib tug nruj txheej txheej. Tsis tas li ntawd, qee qhov ntawm cov ntsaws ruaj ruaj no yuav suav nrog cov khoom siv caij nplooj ntoos hlav los ua kom daim di ncauj nyob rau hauv kev sib cuag nrog lub sealing nto (nco ntsoov tias lub caij nplooj ntoos hlav siv cov ntsaws ruaj ruaj feem ntau yog siv rau cov roj tuav, tsis yog roj tuav). Tsis tas li ntawd, qee daim ntawv thov yuav xav tau lub foob nrog ob daim di ncauj, ib qho ntawm cov plua plav di ncauj lossis plua plav daim di ncauj txhawm rau tiv thaiv kom tsis txhob muaj kab mob nkag mus.
Cov khoom siv sab nraud ntawm lub rotating ncej foob yog lub luag haujlwm rau kev tso thiab tuav lub foob hauv lub foob vaj tse. Ib feem ntawm lub foob no feem ntau yog ua los ntawm cov hlau tsis muaj steel, txhuas, los yog cov khoom tsis yog hlau tsis sib xyaw.
Lub sealing daim di ncauj nws tus kheej yog ua los ntawm elastomers los yog polymers, nrog high-kev ua tau zoo PTFE yog ib qho ntawm feem ntau siv polymers. PTFE ua tau raws li txhua qhov yuav tsum tau ua kom muaj txiaj ntsig zoo, txhim khu kev qha sealing di ncauj, suav nrog lub peev xwm los tswj cov kev kub ntxhov, kev sib raug zoo ntawm cov tshuaj lom neeg, tsis tshua muaj kev sib txhuam thiab kev hnav zoo heev. PTFE kuj tseem tuaj yeem muaj cov khoom ntxiv xws li carbon lossis MoS2 los txhim kho cov khoom xws li lub zog, nruj, hnav tsis kam thiab tsis tshua muaj kev sib txhuam.
Nitrile roj hmab (NBR, Buna-N) thiab polyacrylate roj hmab (ACM) yog cov ntaub ntawv elastomeric dav siv nyob rau hauv automotive rotating ncej seals. Lwm cov chav kawm elastomer feem ntau yog fluoroelastomers, feem ntau hu ua FKM, Viton, thiab FPM. Lawv muaj kev ua tau zoo dua tab sis raug nqi ntau dua li cov roj hmab nitrile thiab polyacrylates.
PTFE rotary ncej foob
Peb pom zoo kom siv PTFE rotary ncej ntsaws ruaj ruaj nyob rau hauv kev lag luam automotive qhov twg los tau. Lawv muab cov kev ua tau zoo tshaj plaws hauv cov xwm txheej hnyav feem ntau koom nrog thiab yog cov tshuaj lom neeg tshaj plaws, kev sib txhuam qis tshaj plaws ntawm cov khoom lag luam niaj hnub no. Lawv ua tau zoo dua cov ntaub ntawv elastomeric thiab hloov pauv sai sai rau hauv ntau daim ntawv thov.
Muaj ntau yam kev xaiv PTFE muaj, suav nrog
Virgin PTFE: Tsawg-ceev, siv lub teeb ua haujlwm
25% iav-filled PTFE: Resistant rau abrasion thiab extrusion, tab sis yuav hnav ntawm shafts hauv qab 62C hardness
23% Carbon / 2% Graphite Filled PTFE: Daim ntawv thov dav dav uas yuav tsum tau ua haujlwm rau crushing thiab deformation
15% iav / 5% MoS2 sau PTFE: Kev hnav zoo heev ua rau nws zoo tagnrho rau kev nrawm dua
Daim ntawv thov
Polyimide-Filled PTFE: Ua haujlwm zoo nrog cov ntaub ntawv mos zoo li 300 SS thiab txhuas vim nws qhov hnav tsis tshua muaj
Hloov kho PTFE: ntau dua txhua yam muaj zog thiab zoo hnav tsis kam.
| TSEEM CEEB NTAWM PTFE | ||||
| ASTM los yog UL xeem |
Khoom | PTFE (tsis tau) |
Cov txiaj ntsig | |
| PHEM | Daim ntawv thov: Gaskets / Ntim cov ntaub ntawv raug tshuaj lom neeg / Bearings: Seals / Piston rings / Hluav taws xob rwb thaiv tsev Cov tshuaj tiv thaiv siab; Tsawg thiab kub muaj peev xwm; Kev tiv thaiv huab cua; Kev sib txhuam qis: hluav taws xob thiab thermal rwb thaiv tsev; Anti-stick nto. |
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| D792 | Ceev (lb/in3) (g / cm3) |
0.078 2.16 |
||
| D570 | Kev nqus dej, 24 teev (%) | < 0.01 | ||
| MECHANICAL | ||||
| D638 | Tensile zog (psi) | 3,900 | ||
| D638 | Tensile Modulus (psi) | 80,000 | ||
| D638 | Tensile Elongation ntawm Break (%) | 300 | ||
| D790 | Flexural zog (psi) | Tsis so | ||
| D790 | Flexural Modulus (psi) | 72,000 | ||
| D695 | Compressive zog (psi) | 3,500 | ||
| D695 | Compressive Modulus (psi) | 70,000 | ||
| D785 | Hardness, Ntug D | D50 | ||
| D256 | IZOD Notched Impact (ft-lb/in) | 3.5 | ||
| THERMAL | ||||
| D696 | Coefficient ntawm Linear Thermal Ex-pansion (x 10 5 in./in./ degree F) |
7.5 | ||
| D648 | Kub Deflection Temp (degree F / degree) ua 264psi |
132 / 55 | ||
| D3418 | Melting kub (degree F / degree) | 635 / 335 | ||
| - | Max ua haujlwm kub (degree F / degree) | 500 / 260 | ||
| C177 | Thermal conductivity (BTU-in/ft2-hr- degree F) (x 10-4 cal/cm-sec- degree) |
1.70 5.86 |
||
| UL94 ua | Flammability Rating | V-O | ||
| Hluav taws xob | ||||
| D149 | Dielectric zog (V / mil) luv lub sijhawm, 1/8 "tuab |
285 | ||
| D150 | Dielectric Constant ntawm 1 MHz | 2.1 | ||
| D150 | Dissipation Factor ntawm 1 MHz | < 0.0002 | ||
| D257 | Volume Resistivity (ohm-cm) ntawm 50% RH |
> 1018 | ||
| Tag nrho cov nqi ntawm 73 degree F (23 degree) tshwj tsis yog sau tseg. | ||||
Cim npe nrov: Tuam Tshoj automotive rotating ncej seals, Tuam Tshoj automotive rotating ncej ntsaws ruaj ruaj manufacturers, lwm tus neeg, Hoobkas
