Track Pad Stiffness Classification thiab Application Specifications
Vim li cas qis - nruj hauv qab - cov ntaub thaiv kev tsheb ciav hlau tau xaiv rau siab - txoj kev tsheb ciav hlau ceev?
High- txoj kev tsheb ciav hlau ceev ntawm 350 km / h muaj qhov xav tau siab heev rau kev tsav tsheb du thiab kev co thiab txo suab nrov. Tsawg-stiffness (20-30kN/mm) nyob rau hauv-rail pads tuaj yeem nqus tau lub log zoo dua-rail cuam tshuam quab yuam thiab txo qis kev sib kis. Tsawg- cov ntaub qhwv tawv tawv muaj qhov elasticity zoo dua, uas tuaj yeem ua haujlwm tsis zoo ntawm - zaus vibration thaum lub sijhawm siab - tsheb ciav hlau khiav ceev thiab txhim kho cov neeg caij tsheb. Nws tuaj yeem ua rau txoj kev sib tw elastic ntau dua, txo cov kev ntxhov siab hauv zos ntau dhau ntawm cov ntsia hlau, thiab txuas ntxiv lub neej kev pab cuam ntawm cov ntsia hlau. Nyob rau tib lub sijhawm, qhov qis- qauv nruj tuaj yeem txo qhov dynamic- qhov sib txawv ntawm qhov kev sib tw ntawm cov qauv khiav, txhim kho lub log- txoj kev tsheb ciav hlau, thiab txo qhov hnav. Tsis tas li ntawd, kev rwb thaiv tsev ntawm cov ntaub qhwv tsis tshua muaj zog yog qhov ruaj khov dua, uas tuaj yeem ua tau raws li qhov xav tau ntawm rwb thaiv tsev ntawm cov kab hluav taws xob thiab ua kom ntseeg tau cov teeb liab kis tau tus mob.
Dab tsi cuam tshuam qhov kev laus tiv thaiv ntawm hauv qab -rail pads muaj nyob rau ntawm txoj kab?
Nyob rau hauv - cov ntaub ntawv tsheb ciav hlau raug tawm sab nraum lub sijhawm ntev, raug hloov pauv kub, nag yaig thiab thauj khoom extrusion. Kev laus tsis txaus yuav ua rau cov khoom tawg, hardening thiab poob ntawm elasticity. Tom qab lub hnub nyoog ntawm lub ncoo, txoj kev taug kev elasticity yuav txo qis, kev co yuav nce, lub log - kev tsheb nqaj hlau yuav hnyav dua, thiab kev puas tsuaj ntawm cov tsheb ciav hlau thiab cov neeg pw tsaug zog yuav nrawm dua. Lub rwb thaiv tsev kev ua tau zoo ntawm cov ntaub qhwv laus tuaj yeem ua tsis tiav, cuam tshuam rau kev ua haujlwm ntawm cov kab hluav taws xob thiab ua rau lub teeb liab tsis ua haujlwm. Nyob rau tib lub sijhawm, lub ncoo laus tsis tuaj yeem cuam tshuam zoo, ua rau muaj kev ntxhov siab hauv zos rau cov neeg pw tsaug zog, uas yog qhov ua rau tawg thiab puas. Tsis tas li ntawd, kev hloov pauv ntawm cov ntaub qhwv lub hnub qub yuav ua rau cov nqi tu thiab lub sijhawm ua haujlwm tsis tu ncua, cuam tshuam rau kev ua haujlwm zoo.
Dab tsi yog qhov zoo ntawm kev sib xyaw ua ke hauv qab - cov ntaub ntawv tsheb ciav hlau piv nrog cov ntaub qhwv roj hmab?
Composite nyob rau hauv -rail pads muab cov elasticity ntawm cov roj hmab nrog lub rigidity ntawm hlau los yog engineering yas, nrog rau kev ruaj ntseg ruaj khov thiab tsis tshua muaj kev kub ntxhov. Nws hnav tsis kam thiab tsim kua muag ua haujlwm siab dua, thiab nws lub neej kev pabcuam yog ntau dua 30% ntev dua li cov roj hmab zoo tib yam, txo cov zaus hloov. Cov ntaub ntawv sib xyaw muaj cov roj zoo dua thiab kev tiv thaiv corrosion, thiab tuaj yeem hloov mus rau qhov chaw taug kev nyuaj, xws li roj av thiab tshuaj lom neeg nruab nrab. Hais txog cov kabmob muaj peev xwm, cov ntaub ntawv sib xyaw tuaj yeem nqa cov khoom loj dua nrog cov deformation me me, haum rau hnyav -haul thiab siab - kab ceev. Nyob rau tib lub sijhawm, kev ua haujlwm rwb thaiv tsev ntawm cov ntaub ntawv sib xyaw yog qhov zoo tshaj plaws, uas tuaj yeem ua tau raws li cov txheej txheem rwb thaiv tsev siab dua ntawm cov kab hluav taws xob.
Yam dab tsi yuav tsum tau xav txog thaum xaiv qhov nruj ntawm hauv qab -rail pads?
Ua ntej, nws yog ib qho tsim nyog los muab cov qauv tsim ntawm cov kab nrawm. Class B qis- cov ntaub qhwv qhov tawv nqaij raug xaiv rau 350km / h cov neeg caij tsheb tshwj xeeb, thiab Chav Kawm A nruab nrab- cov ntaub qhwv tawv tawv raug xaiv rau 250 km / h kab uas tseem nqa cov khoom thauj. Line load tej yam kev mob yog qhov tseem ceeb. Hnyav- cov kab tsheb yuav tsum tsim nyog ua kom cov ntaub ntawv nruj kom ntseeg tau tias muaj peev xwm thiab tsis txhob deformation ntau dhau. Hom kev taug qab qauv kuj yuav tsum tau xav txog. Ballastless lem muaj ntau dua qhov yuav tsum tau ua rau ncoo txhav uniformity, thiab ballasted lem tuaj yeem hloov kho raws li ballast elasticity. Nyob rau hauv cov nqe lus ntawm geological tej yam kev mob, me ntsis qis zog pads tuaj yeem xaiv rau cov kab nrog cov hauv paus muag muag los cuam tshuam ib feem ntawm qhov cuam tshuam. Tsis tas li ntawd, kev nyab xeeb hauv cheeb tsam yuav tsum tau xav txog. Cov ntaub qhwv uas muaj kev ruaj ntseg zoo yog nyiam nyob rau hauv cov cheeb tsam uas muaj qhov sib txawv ntawm qhov kub thiab txias.
How to detect whether the stiffness of under-rail pads meets the standard?
Cov cuab yeej tshwj xeeb nruj yuav tsum tau kuaj xyuas, simulating lub xeev kev nyuaj siab ntawm lub ncoo, siv cov khoom sib txawv, ntsuas qhov sib thooj deformation, thiab suav cov nqi txhav. Thaum lub sij hawm ntsuas, qhov ntsuas kub yuav tsum tau tswj nyob rau hauv tus qauv ntau (23℃± 2 degree) kom tsis txhob muaj kev cuam tshuam ntawm qhov kub thiab txias ntawm cov khoom elasticity. Raws li cov qauv tsim nyog, lub ncoo yuav tsum tau sim nyob rau hauv lub voj voog uas tau teev tseg kom ntseeg tau tias qhov kev hloov pauv tsis tshaj 25% thiab ua tau raws li qhov yuav tsum tau ua kom qaug zog. Rau cov kab nteg, txoj kev taug kev smoothness thiab kev co cov ntaub ntawv sau tuaj yeem siv los ntsuas qhov ncaj qha seb lub ncoo txhav tau txo qis. Thaum lub sij hawm soj ntsuam tsis tu ncua, cov ntaub qhwv hauv qhov chaw sib txawv thiab lub sijhawm ua haujlwm yuav tsum tau them los xyuas kom meej tag nrho cov kev ua tau zoo raws li tus qauv.