1. Dab tsi yog qhov tseem ceeb ntawm txoj kev tsheb ciav hlau (lub taub hau, lub vev xaib, qhov loj me)?
Qhov profile txiav txim siab thauj khoom: lub taub hau dav dav sib kis lub log sib cuag, lub vev xaib tuab tiv thaiv ntsug dabtsi yog khoov, thiab lub hauv paus dav stabilizes txoj kev tsheb ciav hlau ntawm cov neeg pw tsaug zog. High- cov tsheb ciav hlau ceev muaj lub taub hau streamlined kom txo qis aerodynamic luag, thaum cov tsheb thauj khoom muaj lub vev xaib tuab dua rau kev ruaj ntseg sab nraud. Cov tsheb ciav hlau hauv nroog siv lub hauv paus nqaim kom haum rau qhov chaw nruj. Kev tsim profile yog qhov tseem ceeb rau kev ntsuas lub zog, qhov hnyav, thiab kev sib raug zoo nrog cov khoom siv taug qab
2. Cov qauv kev tsheb ciav hlau hauv Is Nrias teb (IRS) txawv li cas los ntawm lwm lub tebchaws Esxias?
Indian Railways (IRS) cov qauv muaj xws li cov ntaub ntawv xws li IRS-60 (60kg / m) thiab IRS-52 (52kg / m), tsim rau kev tsheb sib xyaw (cov neeg caij tsheb thiab cov khoom thauj). IRS rails muaj lub taub hau tuab dua los tswj cov tsheb thauj khoom ntau dhau thiab lub hauv paus dav dua rau kev ruaj ntseg ntawm ballast hauv monsoon- thaj chaw muaj kev nyab xeeb. Tsis zoo li Japanese lossis Suav cov qauv, IRS ua qhov tseem ceeb ntawm cov nqi-zoo, siv qis-alloy steel uas yooj yim dua los tsim hauv zos.
3. Dab tsi yog qhov yuav tsum tau ua rau rail steel nyob rau hauv huab cua kub cheeb tsam?
Nyob rau hauv cov cheeb tsam arctic, rail hlau yuav tsum nyob twj ywm ntawm -40℃kom tsis txhob nkig tawg, siv npib tsib xee-alloyed steel (piv txwv li, 0.3% Ni). Cov cheeb tsam suab puam xav tau cov cua sov-cov hlau tiv taus (xws li chromium-molybdenum alloys) kom tiv taus 50℃+ kub yam tsis muaj softening. Thermal expansion yog tswj los ntawm expansion pob qij txha (arctic) los yog CWR nrog kub-matched vuam (deserts), kom ntseeg tau tias rails tsis buckle los yog tawg.
4. Txoj kev tsheb ciav hlau hnyav li cas cuam tshuam txog kev tsim kho thiab kho cov nqi?
Heaver rails (70kg / m +) txo qhov zaus ntawm kev txij nkawm tab sis nce nqi kev tsim kho pib vim muaj cov fasteners loj dua thiab muaj zog pw tsaug zog. Lub teeb rails (30-45kg / m) yog pheej yig dua rau nruab tab sis yuav tsum tau sib tsoo thiab hloov ntau zaus. Piv txwv li, 60kg / m rail raug nqi 20% ua ntej tshaj li 50kg / m rail tab sis kav ntev li 30% nyob rau hauv high-tsheb thauj mus los, ntsuas cov nqi lifecycle.
5. Dab tsi yog qhov txawv ntawm bullhead thiab tiaj tus - hauv qab rails?
Bullhead rails muaj symmetrical "bulbous" lub taub hau thiab muaj kev ruaj ntseg los ntawm cov rooj zaum, feem ntau nyob rau hauv keeb kwm railways (xws li, UK cov cuab yeej cuab tam kab). Pav ca-cov kab hauv qab (tus qauv niaj hnub) muaj lub hauv paus ncaj nraim rau cov neeg pw tsaug zog, muab kev ruaj ntseg zoo dua thiab kev saib xyuas qis dua. Pav ca- cov kab hauv qab ua rau cov kev sib txuas thoob ntiaj teb vim kev txhim kho yooj yim dua, kev sib raug zoo nrog CWR, thiab muaj peev xwm thauj khoom ntau dua, txawm hais tias bullhead rails tseem nyob hauv daim ntawv thov niche.