Kev ua tau zoo thiab kev ua lag luam tshaj plaws ntawm kev tsheb nqaj hlau (Railway Sleeper Pads)
Ⅰ Dab tsi yog qhov ntsuas tau tseem ceeb ntawm kev tsheb ciav hlau hauv kev co damping thiab qoj ib ncig?
1. Qis txhav txhav(Feem ntau 50-120 kn \/ mm) yuav tsum tau ua kom zoo rau nqus tej yam kev cuam tshuam lub zog thaum tswj xyuas kev ruaj ntseg hauv qab thauj.
2. Resonance zausyuav tsum qis dua 30 hz kom ua tau zoo cais tawm ntawm kev tsheb ciav hlau dhau, tshwj xeeb tshaj yog nyob hauv nroog loj.
3. Poob yam(Damping piv) ntawm {0. {{{}}. 3 yog qhov zoo tshaj rau kev sib tw kom haum thiab ntev ntev.
4. Kev ua haujlwm nrawm(Ib ISO 1856) kom ntseeg tau cov ntaub tuab tom qab lub chaw thau khoom ntev, tiv thaiv kev poob ntawm elasticity.
5. Lub suab txo qis kev ua tau yog ntsuas hauv DB (a), nrog cov kev ua tau zoo pads txo lub suab nrov los ntawm cov qauv cov qauv.
Ⅱ Cov roj hmab tsheb ciav hlau sib piv piv rau Polyurethane Pads raws cov nqe lus ntawm durability thiab nqi?
1. Cov roj hmab ncoo (NR \/ SBR \/ EPDM)Muab cov khoom zoo nkauj elasticity zoo nkauj thiab qaug zog tsis kam (10-15} xyoo txuag) ntawm cov nqi khoom qis dua.
2. POLYURETHANE (PU) PADSMuab kev ua haujlwm zoo tshaj thiab muaj peev xwm siab dua, ua rau lawv haum rau hnyav-hauv paus kab.
3. Roj hmab degrades sai dua hauv UV kis thiab ozone, thaum PU ua yeeb yam zoo dua nyob rau hauv huab cua sov ({1} {2}} degree).
4. Cov nqi ntau lawm rau PU PU ntawm yog 20-30% siab dua roj hmab, tab sis lawv cov kev pabcuam txuas ntxiv yuav ua pov thawj kev nqis peev.
5. Ib puag ncig cov roj hmab (rov ua dua tshiab) dhau (petroleum dhau (petroleum-raws), muaj kev cuam tshuam nrog kev lag luam hauv eco-nco qab.
Ⅲ Cov kev tsheb ciav hlau tshwj xeeb yog cov tsheb ciav hlau siab uas cuam tshuam ntawm kev tsheb nqaj hlau loj?
1. Cov zaus-vam khom tawv is critical to accommodate speeds >250 km \/ h, xav tau kom meej cov poj niam txheeb xyuas thaum lub sijhawm tsim.
2. Hluav Taws Kub Kuj(En {45545-2) yog yuav tsum tiv thaiv kom tiv thaiv cov pa luam yeeb hauv ntau lossis chaw nres tsheb.
3. Hluav taws xob rwb thaiv tsev (>10⁹ ω) Yuav tsum muaj kev tswj kom tsis txhob muaj kev cuam tshuam nrog kev khiav tsheb ciav hlau thiab cov phiajcim.
4. Kev laus tiv thaivKev sim sim ua 30 xyoo ntawm kev pabcuam (UV, cycling cycling) kom ntseeg tau tias muaj peev xwm ua tau ruaj khov.
5. Kev nrawm nrawm pads feem ntau teeb tsaNtau Txheej Txheej(Roj hmab-foam-foam composites) rau phiaj tshwj xeeb ntau zaus ntau zaus.
Ⅳ Yuav ua li cas tuaj yeem khaws cov khoom siv tawm tsam cov huab cua noo noo \/ khov kho?
1. Hydrophobic ntxivNyob rau hauv cov roj av cov pa taws tiv thaiv kev nqus dej thiab ua kom qis dua hauv cov cheeb tsam txias.
2. Kaw cov qauv ntawm tesNyob rau hauv EPDM lossis microcelli pu thaiv noo noo thaum tswj cov kev tswj.
3. Los ntawm kev kho mob hydrolysis for PU pads are essential in tropical climates with >80% av noo.
4. Tsawg-Kub Yooj YimKev ntsuam xyuas (piv txwv li, {-40 degree Txias khoov sim ttm d746) Tshawb xyuas kev ua haujlwm hauv Arctic.
5. Nqos cov ntawv thov yuav tsum tauntsev txau tiv tshuaj({1000+ teev rau ASTM B117) los tiv thaiv corrosion-inducts txhav hloov.
Ⅴ yog eco-tus phooj ywg rail pads (piv txwv li, siv cov khoom siv ua dua tshiab) tau txais kev ua lag luam nyob hauv Western lag luam?
1. EU Las Cov Qauv Nyiaj Txiag now encourage pads with >30% siv cov roj hmab siv roj hmab (piv txwv li, los ntawm qhov kawg-ntawm-lub neej log tsheb).
2. Bio-based polyurethanes(Siv cov roj taum roj derivatives) yog tshwm sim tab sis ntsej muag tus nqi thiab kev ua haujlwm lag luam tawm.
3. Chav ntsuam xyuas kev ntsuam xyuas (LCA)Muaj kev sib raug zoo los ntawm cov leeg yuav tsum nyob hauv cov leeg, ua kom cov khoom siv tsawg-cov hlau.
4. End-of-Lub Neej Recyclabilityyog tus tseem ceeb sib txawv, nrog thermoplastic elastomers (TPE) Tau txais kev ua lag luam sib qhia ntau thermosets.
5. Daim ntawv pov thawj zoo liMenyuam txaj rau menyuam dev (C2C)Cuam Tshuam Hauv Tebchaws Yelemees \/ Scandinavia Ntau tshaj li tus nqi ib leeg.