Dab tsi yog Shore A hardness ntawm railway roj hmab ncoo?
Dec 22, 2025
A rail ncoo, tseem hu ua rail roj hmab phaj, yog tsim los ntawm lub tsheb ciav hlau khi phaj thiab ko taw ntawm txoj kev tsheb ciav hlau, ua los ntawm elastic polyurethane lev, uas yog interposed ntawm steel rails thiab khi sleepers los tiv thaiv lub sleeper saum ntawm hnav thiab cuam tshuam. Nws txoj kev nruj nruj yog siv los ua kom lub elasticity ntawm lub superstructure ntawm lub ballast thiab txo kev poob siab thiab kev co hauv lub tsheb ciav hlau.
Dab tsi yog Shore A hardness ntawm railway roj hmab ncoo?
Railway rubber ncoo feem ntau muaj Shore A hardness nruab nrab ntawm70a85 ua, nrog cov specifications ib ncig75A ±5(lub ntsiab lus 70A txog 80A) rau cov khoom siv roj hmab, tsim kom sib npaug elasticity rau kev co dampening nrog durability tiv thaiv lub tsheb ciav hlau loads, tab sis qee cov ntaub ntawv nyuaj xws li EVA yuav ncav cuag 95A. Lub hardness txawv ntawm cov khoom (natural roj hmab, hluavtaws, EVA) thiab cov ntawv thov tshwj xeeb, ntsuas siv lub durometer.
| Rubber Rail Pad | ||
| Technical Parameter | Chav tsev | Tus nqi |
| Kev nruj | KN | 90-130 |
| Hardness Ntug A | degree | 72-80 degree |
| Electronic Resistance | Ω | Ntau dua lossis sib npaug rau 106 |
| Tensile zog ua ntej kev laus | Mpa | Ntau dua lossis sib npaug li 12.5 |
| Elongation ua ntej kev laus | % | Ntau dua lossis sib npaug li 250 |
Hom Hardness Ranges:
- Synthetic Rubber Pads: Feem ntau teev raws li 75℃A ± 5, poob rau hauv 70A txog 80A ntau yam, muab kev poob siab zoo thiab ua haujlwm.
- Ntuj Rubber Pads: Tej zaum yuav raug teev raws li 75-80 MPa, sib cuam tshuam rau qhov zoo sib xws Shore A ntau yam rau kev hloov pauv.
- EVA Pads: tuaj yeem nyuaj dua, qee zaum nyob ib puag ncig 92A - 98A, rau qhov sib txawv ntawm kev thauj khoom-cov kabmob xav tau.
| EVA: Polyethylene 80%, Vinyl Acetate 20%. | |||
| Technical Parameter | Chav tsev | Kev Xav Tau | Tus nqi |
| Qhov ntom | g/cm3 | 0.95-0.98 | 0.95 |
| Tensile zog | Mpa | Ntau dua lossis sib npaug li 15 | 16 |
| Elongation | % | >500 | 550 |
| Melting Point | degree | 170-190 | 170 |
| Rwb thaiv tsev Resistance | Ω | Loj dua los yog sib npaug rau 1 × 1010 | 5.0 ×1010 |
| Hardness | A | Ntau dua lossis sib npaug li 90 | 92(A) |
Dab tsi cuam tshuam rau Shore A hardness muaj nyob rau hauv cov ntaub ntawv rail?
Shore A hardness nyob rau hauv rail pads dictates lawv cushioning, vibration dampening, thiab load tis, nrog rau nruab nrab hardness (nyob ib ncig ntawm 60-70A) muab qhov zoo tshaj plaws tshuav nyiaj li cas rau absorbing shocks thiab txo suab nrov, thaum nyuaj heev kis vibration thiab mos heev ua rau ntau compression thiab rail sinking, shortening ncoo lub neej.
Vim li cas nws tseem ceeb rau Rail Pads:
- Kev vibration & suab nrov: Hardness tswj tau zoo npaum li cas lub ncoo deforms kom nqus lub log -rail cuam tshuam, cuam tshuam ncaj qha rau lub suab nrov thiab kev caij tsheb zoo.
- Load Distribution: Lub hardness tsim nyog ua kom muaj kev sib kis ntawm thaj chaw loj dua, txo kev ntxhov siab ntawm txoj kev tsheb ciav hlau thiab pw tsaug zog.
- Durability: Txoj cai hardness tiv thaiv tsis ua hauj lwm ntxov ntxov, nrog cov roj hmab pads ntev li 5-8 xyoo nyob rau hauv ib txwm muaj.
Peb EVA / HDPE / roj hmab rail pads yog nrog siab elasticity, siv rau cov hom kev tsheb ciav hlau xws li rail UIC54, UIC60, BS80lbs, BS100lbs, thiab ntau thiab tsawg raws li tau txiav txim. Cov ntaub qhwv tuaj yeem hloov kho nrog lossis tsis muaj grooves, hauv ntau qhov tsim tau, nyob ntawm cov neeg siv khoom xav tau.
