Dab tsi Rail Pad Ua thiab Vim Li Cas Kub Kub Tseem Ceeb
Lub rail pad zaum ntawm lub hauv paus kev tsheb ciav hlau thiab lub rooj zaum pw tsaug zog, txo kev sib txhuam thiab kev cuam tshuam, ntxiv elasticity rau txoj kab tsheb ciav hlau, thiab ua kom poob siab thiab kev vibration ntawm lub log hla. Tag nrho cov haujlwm no nyob ntawm tus cwj pwm viscoelastic ntawm cov khoom siv ntaub qhwv, thiab qhov kub thiab txias yog qhov sib txawv ntawm kev tswj: kub softens lub polymer thiab txo nws cov tawv nqaij, txias stiffens nws thiab ua rau nws nkig. Qhov kev khiav hauj lwm kub ntawm lub tsheb ciav hlau yog li qhov tsim qauv, tsis yog daim duab lag luam. Nws yuav tsum npog tag nrho lub caij nyoog ntawm txoj kab, thiab nws yuav tsum tau teev ua ke nrog rau qhov nruj thiab hardness qhov tseem ceeb uas tus qauv tsim xav tau.
Kev khiav hauj lwm kub ntawm cov khoom siv
| Khoom siv | Hom kev khiav hauj lwm ntau yam | Nco tseg |
|---|---|---|
| EPDM / natural roj hmab | -40℃rau +70 degree | Tag nrho -qib puag ncig rau kev siv dav dav |
| EVA | -40℃rau +60 degree | Lub teeb rail thiab kev siv qis qis |
| Polyurethane (PU) | -40℃rau +70 degree | Kev nruj nruj ntawm qhov ntau |
| Tsawg-kev ntsuas kub | mus txog -50 degree | Alpine thiab permafrost aav |
Rau cov kab kub thiab kub kub, EPDM lossis cov roj hmab ntuj nrog lub ntsuas -40℃rau +70℃ntsuas yuav luag txhua lub luag haujlwm. EVA pads raug xaiv rau lub teeb tsheb ciav hlau qhov chaw thauj khoom thiab ceev yog nruab nrab. Polyurethane tau teev tseg thaum qhov nruj yuav tsum nyob ruaj khov nyob rau hauv qhov ntau, piv txwv li ntawm cov kab metro nrog qhov sib txawv ntawm qhov kub thiab txias ntawm qhov chaw. Qhov twg lub caij ntuj no tsim kub poob qis dua -40 degree, yuav tsum tau thov ib qho tshwj xeeb uas tsis muaj qhov kub thiab txias formulation, thiab lub ncoo hardness thiab nruj yuav tsum tau rov xyuas dua ntawm qhov tsim txias txias.
Rubber Rail Pad Technical Parameters
| Technical parameter | Chav tsev | Tus nqi |
|---|---|---|
| Kev nruj | kN kev | 90 - 130 |
| Hardness | Ntug A | 72 - 80 |
| Hluav taws xob tsis kam | Ω | Ntau dua lossis sib npaug li 10⁶ |
| Tensile lub zog ua ntej kev laus | MPa | Ntau dua lossis sib npaug rau 12.5 |
| Elongation ua ntej kev laus | % | Ntau dua lossis sib npaug li 250 |
EVA Rail Pad Technical Parameters
| Technical parameter | Chav tsev | Kev xav tau | Yam nqi |
|---|---|---|---|
| Qhov ntom | g/cm³ | 0.95 - 0.98 | 0.96 |
| Tensile zog | MPa | Ntau dua lossis sib npaug li 15 | 16 |
| Elongation | % | > 500 | 550 |
| Melting point | degree | 170 - 190 | ≈ 170 |
| Rwb thaiv tsev tsis kam | Ω | Loj dua los yog sib npaug rau 1 × 10¹⁰ | 5.0 × 10¹⁰ |
| Hardness | Ntug A | Ntau dua lossis sib npaug li 90 | 92 |
Ob cov ntaub ntawv -cov ntaub ntawv zoo tseem ceeb rau kev yuav khoom. Lub hardness chav tsev ntawm cov roj hmab ncoo yog Shore A, tsis kub, thiab cov hluav taws xob tiv thaiv cov nuj nqis yog qhov kev txiav txim ntawm qhov loj, yog li tus nqi xws li 10⁶ Ω yuav tsum tau sau nrog tus exponent, tsis yog tus lej 106. Qhov kev xav tau ntawm EVA ntom ntom yog 0.95 txog 0.98 g / cm³, yog li ib qho kev lees txais kev ntsuas ntawm .6 g / cm³.
Kev ceev faj thaum tshav kub kub heev
Thaum tshav kub kub softens lub ncoo thiab txo nws cov nruj, uas ua rau kev co damping thiab cia cov tsheb ciav hlau nyob rau hauv load. Siv cov ntaub qhwv ntsej muag uas tiv thaiv softening thiab tuav lawv cov tawv nqaij, xws li polyurethane lossis cua sov-cov roj hmab ruaj khov. Nyiam cov ntaub qhwv tuab, feem ntau yog 12 mus rau 15 hli, qhov xav tau qhov kub thiab txias, vim tias cov tuab ntxiv absorbs nthuav dav thiab kev ntxhov siab. Txo cov tsheb ciav hlau ceev thaum lub caij kub siab kom txo qis cov rog uas tuaj yeem ua rau taug qab buckling, thiab rov-tighteners tom qab lub sij hawm cua sov vim qhov nthuav thiab contraction hloov lub clamping load. Painting lub tsheb ciav hlau dawb kom muaj kev cuam tshuam lub hnub ci cua sov yog ib qho kev ntsuas ntawm cov viaducts qhov chaw tsheb ciav hlau kub siab.
Kev ceev faj thaum txias heev
Qhov txias txias ua rau lub ncoo txhav thiab tuaj yeem ua rau lub ncoo nkig. Lub ncoo yuav tsum nyob twj ywm ntawm qhov tsim lub caij ntuj no kub, yog li xyuas qhov hardness ntawm qhov ntsuas kub thaum xaiv, tsis yog nyob rau hauv chav tsev kub xwb. Txias ua kom zoo dua qub, tab sis ib lub ncoo uas nruj heev hauv qhov sib sib zog nqus txias txias kev co mus rau hauv tus neeg pw tsaug zog es tsis txhob nqus nws, uas ua rau muaj kev ntxhov siab ntxiv. Ntawm cov kab uas muaj lub caij ntuj no hnyav, qhia qhov qis - qhov ntsuas kub ntawm lub ncoo tsim thiab tshuaj xyuas cov ntaub qhwv tom qab thawj qhov txias txias rau kev tawg ntawm cov npoo, uas yog hom txias tsis ua haujlwm.
Cov lus nug nquag
Q1: Dab tsi thickness ntawm rail ncoo yuav tsum tau xaiv?
Cov ntaub ntawv roj hmab txheem feem ntau yog 5 mus rau 10 hli, cov ntawv siv hnyav xws li cov khoom thauj thiab siab - cov kab ceev siv 12 mus rau 20 mm rau cushioning zoo dua, thiab qis - daim ntawv thov profile siv 4.5 txog 6 hli. Lub thickness yuav tsum phim lub fastening system geometry thiab tsim pad stiffness.
Q2: Lub tsheb ciav hlau puas tuaj yeem siv qis dua nws qhov ntsuas kub?
Tsuas yog nrog kev saib xyuas. Hauv qab qhov ntsuas txias txwv lub ncoo stiffens sharply thiab tuaj yeem tawg nyob rau hauv kev cuam tshuam. Yog tias cov kab yuav tsum ua haujlwm qis dua qhov ntsuas, siv qhov ntsuas kub tsawg - thiab txheeb xyuas qhov nyuaj ntawm qhov ntsuas kub tsim.
Q3: Dab tsi yog qhov txawv ntawm qhov tawv tawv thiab cov ntaub qhwv tawv?
Hardness, nyob rau hauv Shore A, yog ib qho kev ntsuas ceev ntawm qhov chaw tiv taus ntsuas nrog lub durometer. Kev nruj, hauv kN, yog qhov load-deformation yam ntxwv ntawm tag nrho cov ncoo nyob rau hauv txoj kev tsheb ciav hlau, thiab nws yog tus nqi siv nyob rau hauv kev khiav dynamics. Ob leeg yuav tsum tau teev tseg.
Q4: Vim li cas hluav taws xob tiv thaiv tau teev tseg rau cov tsheb ciav hlau?
Rail pads yog ib feem ntawm cov hlua hluav taws xob rwb thaiv tsev ntawm txoj kev tsheb ciav hlau thiab cov neeg pw tsaug zog, tiv thaiv cov teeb liab hluav taws xob thiab txwv tsis pub muaj hluav taws xob tam sim no ntawm cov kab hluav taws xob. Ib lub ncoo uas tsis muaj rwb thaiv tsev tsis txaus tuaj yeem ua rau luv luv.
Q5: Ntau npaum li cas cov tsheb ciav hlau hloov pauv?
Kev hloov pauv raws li qhov xwm txheej, tsis yog lub hnub nyoog ruaj khov: cov ntaub qhwv tau hloov thaum lub zog los yog qhov tawv nqaij tawm ntawm qhov ntau, thaum cov npoo tawg los yog torn, thaum compression teeb pom, los yog thaum pw tsaug zog thiab txuas ntxiv txuas ntxiv. Kev tshuaj xyuas qhov muag ntawm txhua lub voj voog kho fastener yog tus qauv tsim.