Kev ua tau zoo thiab kev thov cov xwm txheej ntawm Rail ntaub qhwv
Ⅰwhat yog qhov sib txawv hauv kev thov cov xwm txheej ntawm cov tsheb ciav hlau tsheb ciav hlau cov ntaub qhwv thiab cov ntaub qhwv cov yas?
Roj hmab ntaub ntawv (txhav txhav (txhav tawv 20-50 kn \/ m) muab cov hlua caij nyoog kom zoo, txo lub log-rail rau lub log-{3} db. Piv txwv li, X3 roj hmab ntim siv hauv CRH380 tsheb ciav hlau muaj 10+} xyoo aging tsis kam. Yas pads (nruj heev {{{80-120 kn \/ m siab, zoo tshaj plaws rau kev sib tw tsheb ciav hlau (<-25℃), requiring modified PP materials.
ⅡHow yog qhov "ntim resistivity" qhov ntsuas ntawm insulated Rail pads kuaj?
Insulated pads yuav tsum muaj lub ntim tiv taus ntau dua los yog sib luag rau 10¹⁰ω¹⁰ω. Txoj kev xeem: Tso ib 50mm-kab ntawm cov pob tw, thov 500v DC voltage, thiab kev ntsuas to tam sim no. Ib pob ntawm cov xov tooj nthuav tawm ua tsis tiav vim yog cov roj hmab dog dig (Resistivity tsuas yog 10nd tam sim no. Lawv tau hloov nrog cov pa roj hmab dub puv cov neeg NCR pads (10¹¹ω¹¹ω · cm), nce nqi los ntawm 18%.
Ⅲ Qhov twg yog qhov zoo ntawm "cov qauv qhaub cij" nyob rau hauv composite rail pads?
Composite Pads feature "Roj Hmab-Roj Hmab" Peb Txheej Txheej Txheem, Nrog Ib Qho Hluav Taws Xob (}} Piv rau cov roj hmab ntshiab, lawv cov nkees ua hauj lwm nce tsawg dua los ntawm 3% tom qab 10⁶ mais tom qab muaj qag phaus ntau dua lossis sib npaug rau 30 tons. Piv txwv li, BHP Billiton tus hlau hlau Ore railway siv cov ntaub qhwv nrog {xyoo lifesply, txo cov pob los ntawm 50%.
Ⅳ Qhov qauv rau "cov roj kev ntsuam xyuas" yuav tsum tau los ntawm European cov neeg siv khoom rau kev tsheb nqaj hlau rau kev tsheb nqaj?
EU en 13481-2 qauv yuav tsum tau pads los qhia tsawg dua lossis sib npaug lossis muaj sib luag nrog cov roj ntxhia (piv txwv li roj ntxhia). HNBR lossis FKM Rubbers xav tau, raug nqi 40% -60% ntau tshaj li cov roj hmab dog dig. Hauv ib rooj plaub, sbr raws li cov ntaub qhwv kab mob o tuaj 18% hauv kev sim roj thiab tau tag nrho tsis lees txais.
ⅤHow Qhov "thermal kev ua haujlwm" ntawm Rail ntaub ntawv cuam tshuam kev pabcuam lub neej?
Tom qab kev laus nyob rau hauv 70 teev rau 72 teev, ntaub qhwv yuav tsum qhia tsawg dua lossis sib npaug ntawm 20% tensile lub zog ploj thiab tsawg dua los yog sib npaug. Cov cheeb tsam huab cua (piv txwv li, Southeast Asia) Xav kom cov neeg muaj kev laus-resistant tsim (ntxiv antioxidant 4010NA); Txwv tsis pub, cov ntaub qhwv zoo tib yam tsis pub dhau 3 xyoos. Indonesian txoj haujlwm raug kev puas tsuaj 45% Pad kev puas tsuaj tom qab 18 lub hlis vim tsis muaj kev hloov kho, muaj tus nqi hloov kho thaum ntxov.