1. Rail gauge yog dab tsi, thiab yuav ua li cas tuav nws?
Rail gauge yog qhov kev ncua deb ntawm ob txoj hlua (1435mm tus qauv). Rails tuav ntsuas ntawm cov fasteners: clips (piv txwv li, Pandrol clips) rau tiaj tus - hauv qab rails, los yog cov rooj zaum / cov yuam sij rau bullhead rails. Fasteners tuav txoj hlua rau hauv qhov chaw, tiv thaiv kev txav mus los. Ntawm qhov nkhaus, sab hauv cov ntsia hlau siv nruj dua los tiv thaiv lub log flange siab. CWR kuj tseem pab tau - txoj kev sib txuas yog nruj dua, tswj kev ntsuas zoo dua li kev sib koom ua ke.
2. Suav CRTS 300N rail yog dab tsi, thiab dab tsi ua rau nws haum rau 350km / h?
CRTS 300N yog Tuam Tshoj txoj kev siab - nrawm nrawm rau 350 km / h kab. Nws siv siab -purity pearlitic steel nrog vanadium (V) kom txo tau cov kev suav nrog, txo qis qaug zog. Nws lub taub hau profile yog precision-machined (75mm dav, 32mm qhov siab) kom phim F-1 siab-ceev log profiles, txo kev sib cuag kev nyuab siab kom tsawg dua los yog sib npaug rau 600MPa. Nws yog cua sov{18}}kho (300–350HB taub hau hardness) rau hnav tsis kam thiab koom rau hauv 100m CWR kom tshem tawm cov pob qij txha. Kev tswj xyuas nruj (ultrasonic / magnetic test) kom tsis muaj qhov tsis xws luag -tseem ceeb rau kev kub ceev
3. European UIC 75V tsheb ciav hlau yog dab tsi, thiab dab tsi ua rau nws haum rau hnyav -haul hlau ore thauj?
UIC 75V yog European hnyav- tsheb ciav hlau hnyav 75kg / m, tsim rau qag loads txog 32t- zoo tagnrho rau kev thauj cov hlau ore (xws li Sweden's LKAB hlau ore kab). Nws muaj lub taub hau txuas ntxiv (40mm tuab) thiab lub vev xaib (19mm tuab), muab lub zog ntxiv los tiv thaiv kev cuam tshuam ntawm cov tsheb ciav hlau hnyav. Txoj kev tsheb ciav hlau raug quenching{11}}tempering, ua rau 340–380HB lub taub hau hardness uas tiv taus hnav los ntawm cov hlau ore plua plav. Nws lub hauv paus dav (160mm) txhim kho kev ruaj ntseg ntawm cov pob zeb pw tsaug zog, txawm tias nyob rau hauv lub voj voog hnyav. UIC 75V kuj muaj cov sulfur thiab phosphorus tsawg (<0.03%) to reduce internal defects, ensuring it can handle long-term heavy traffic without fatigue cracking.
4. Kev tsheb ciav hlau "buckling," yog dab tsi thiab cov xwm txheej twg ua rau muaj kev pheej hmoo rau CWR?
Rail buckling yog qhov txaus ntshai khiav deformation qhov twg CWR khoov lossis twists kab rov tav vim muaj kev ntxhov siab ntau dhau los ntawm thermal expansion. Cov xwm txheej uas ua rau muaj kev pheej hmoo muaj xws li: 1.Kub kub: Tshaj qhov nruab nrab kub (piv txwv li, 35℃hauv ib cheeb tsam nrog 25℃nruab nrab temp) ua compression . 2.Kev txhawb nqa tsis zoo: Loose ballast lossis puas pw tsaug zog txo qhov tsis kam rau buckling. 3.Curved lem: Lateral rog ntawm curves amplify compressive stress. 4.Tsis txaus fasteners: Loose clips los yog spikes cia rails hloov, ua phem buckling. Buckling tuaj yeem cuam tshuam cov tsheb ciav hlau, yog li cov tsheb ciav hlau saib xyuas qhov kub thiab tshuaj xyuas CWR txhua hnub hauv huab cua kub - yog tias qhov kub siab tshaj qhov txwv tsis pub muaj kev nyab xeeb, kev txwv ceev yuav raug txwv kom txo qis kev ntxhov siab.
5. Qhov txawv ntawm "metro rails" thiab "mainline high-speed rails," thiab cov qauv siv li cas?
Metro rails (rau hauv nroog subways / lub teeb tsheb ciav hlau) ua qhov tseem ceeb ntawm kev ua haujlwm ntev rau kev nres ntau zaus - pib thiab nruj nkhaus, thaum lub ntsiab kab siab - cov tsheb ciav hlau ceev ceev tsom mus rau qhov smoothness thiab ceev. Metro rails (piv txwv li, Tuam Tshoj tus GB 50kg / m, UIC 54) yog sib dua (50–54kg / m) nrog lub taub hau nyuaj (320–350HB) los tiv thaiv hnav los ntawm kev sib tsoo tsis tu ncua. Lawv muaj qhov luv luv (25m) kom yooj yim rau kev teeb tsa hauv qhov av. Mainline siab -cov tsheb ciav hlau ceev (CRTS 300N, UIC 60) hnyav dua (60kg / m) nrog cov ntaub ntawv meej kom txo qis suab nrov ntawm 300+km / h, thiab ntev ntev (100m) rau CWR. Metro rails kuj tseem siv ntau dua corrosion-cov coatings resistant (epoxy) rau hauv av ntub dej, thaum siab - ceev rails siv high-purity steel los txo qaug zog.