1. Qhov txawv ntawm "rail head width" thiab "rail base width," thiab vim li cas lawv txawv ntawm cov qauv?
Rail taub hau dav yog kab rov tav nyob rau sab saum toj ntawm txoj kev tsheb ciav hlau (qhov twg lub log sib cuag), thaum lub tsheb ciav hlau dav dav yog qhov dav ntawm txoj kev tsheb ciav hlau hauv qab (uas so ntawm cov neeg pw tsaug zog). Lawv sib txawv los ntawm cov qauv kom haum rau kev thauj khoom thiab taug qab cov kev xav tau: UIC 54 muaj 73mm lub taub hau dav (rau lub teeb log sib cuag) thiab 140mm puag dav (ruaj khov ntawm cov ntoo pw); UIC 60 muaj 75mm lub taub hau dav (hnyav hnyav) thiab 150mm lub hauv paus dav (zoo dua kev ruaj ntseg ntawm cov pob zeb pw). Hnyav-haul AREMA 132RE muaj 80mm lub taub hau dav (resists hnav) thiab 155mm puag dav (kuav 35t axles). Cov qhov ntev no ua kom lub tsheb sib npaug ntawm lub log sib cuag, thauj khoom faib, thiab pw tsaug zog sib raug zoo.
2. Dab tsi yog "rail creep," thiab nws cuam tshuam li cas rau cov tsheb ciav hlau zoo li UIC 60 hauv cov kab hnyav -haul?
Rail creep yog qhov qeeb, qhov ntev ntawm txoj hlua ntawm txoj kev taug kev, tshwm sim los ntawm kev sib txhuam ntawm lub log (tshwj xeeb tshaj yog thaum braking / acceleration). Rau UIC 60 nyob rau hauv hnyav- cov kab tsheb, cov kab nkag tuaj yeem hloov cov tsheb ciav hlau los ntawm 5-10mm nyob rau ib hlis, ua rau cov pob qij txha tsis zoo thiab ua rau muaj kev ntxhov siab rau cov fasteners. Nws kuj stretches rails nyob rau hauv ib co seem (ua rau nro) thiab compresses lwm tus (risking buckling). Txhawm rau tiv thaiv nws, kev tsheb ciav hlau teeb tsa "tiv thaiv- cov cuab yeej nkag" (clamps uas tuav cov hlua rau cov neeg pw tsaug zog) thiab siv CWR (uas tiv thaiv nkag tau zoo dua li kev sib koom ua ke). Kev ntsuas tsis tu ncua (siv cov cim raws txoj kab) pab kho cov kab rov qab mus rau txoj haujlwm, tiv thaiv kev puas tsuaj rau UIC 60 thiab taug qab cov khoom.
3. Suav CRTS 400BF rail yog dab tsi, thiab nws zoo li cas rau 400km / h siab -kev ntsuas ceev?
CRTS 400BF yog tus qauv siab- kev tsheb ciav hlau ceev tau tsim rau Tuam Tshoj txoj kab 400km / h (piv txwv li, Beijing-Zhangjiakou xeem seem). Nws siv ultra-siab-purity pearlitic steel (sulfur Tsawg dua lossis sib npaug li 0.01%, phosphorus Tsawg dua lossis sib npaug li 0.02%) txhawm rau txo cov kev suav nrog, txo qis qaug zog los ntawm siab - zaus vibrations. Nws lub taub hau profile yog "streamlined taper" (76mm dav, 33mm qhov siab) uas txo cov cua tsis kam thiab lub log -rail kev sib cuag kev ntxhov siab kom tsawg dua lossis sib npaug li 500MPa-tseem ceeb rau 400km / h. Txoj kev tsheb ciav hlau tau txais kev kho cua sov peb zaug (quenching-tempering-quenching) kom ua tiav 350-380HB lub taub hau hardness, tiv taus hnav los ntawm ultra- lub log ceev. Nws kuj tau koom nrog rau hauv 200m CWR (ntev tshaj li tus qauv 100m) txhawm rau txo cov pob qij txha ntxiv, ua kom muaj kev sib tw ntawm qhov nrawm nrawm.
4. Vim li cas qee qhov nqaim - ntsuas kev tsheb ciav hlau siv "cov tsheb ciav hlau hnyav" (xws li UIC 33), thiab lawv cov kev txwv yog dab tsi?
Nqaim- ntsuas kev tsheb ciav hlau (tsawg dua lossis sib npaug li 1067mm) siv cov tsheb sib sib zog nqus zoo li UIC 33 (33kg / m) vim tias lawv cov tsheb ciav hlau me dua (qag loads tsawg dua lossis sib npaug li 12t) thiab nrawm (tsawg dua lossis sib npaug li 80km / h)- hnyav thiab tsis tsim nyog. UIC 33's slim profile (65mm lub taub hau dav, 120mm lub hauv paus dav) haum nqaim-gauge sleepers thiab txo qhov hnyav ntawm kev tsim kho, uas zoo tagnrho rau roob nqaim- ntsuas kab (xws li Switzerland's Rhaetian Railway). Cov kev txwv muaj xws li: 1.Tsawg load peev: Can't handle axle loads >15t, txiav txim tawm hnyav thauj khoom . 2.Ntxiv hnav: Lub taub hau softer (260–280HB) hnav sai dua UIC 60, yuav tsum tau sib tsoo ntau zaus . 3.Kev txwv ceev: Unsuitable for >100km / h, raws li nws tsis muaj rigidity los tiv thaiv kev co.
5. Dab tsi yog "rail taub hau hollow hnav," thiab cov ntsia hlau twg yog qhov cuam tshuam rau nws?
Rail taub hau hollow hnav yog ib qho kev nyuaj siab ntawm lub taub hau ntawm txoj kev khiav, tshwm sim los ntawm lub log plam (xws li, hnyav braking, ntub dej) los yog lub log tsis sib haum -rail profiles. Nws yog feem ntau nyob rau hauv: 1.Metro rail (GB 50kg / m, UIC 54): Nquag nres- pib nce lub log plam, tshwj xeeb tshaj yog nyob rau hauv cov kab hauv av nrog cov kab ntub dej. 2.Heavy- tsheb ciav hlau (AREMA 132RE): Loaded freight tsheb ciav hlau (35t axles) ua rau plam ntau dua thaum braking ntawm qib siab . 3.Curved rails: Pem hauv ntej muaj kev quab yuam lub log, ua rau plam thiab hollow hnav. Hollow hnav cuam tshuam lub log kev sib cuag, nce kev vibration- cuam tshuam rau hauv av kom rov ua kom lub tiaj tus profile. Metro rails feem ntau xav tau kev kuaj xyuas txhua hli rau qhov hnav tsis zoo vim lawv nres siab - pib zaus.