Cov khoom siv thiab kev ua haujlwm hloov kho ntawm Rail Pads
Dab tsi yog cov ntaub ntawv tseem ceeb ntawm hauv qab -rail base plates thiab lawv cov yam ntxwv?
Cov ntaub ntawv tseem ceeb ntawm hauv qab - cov kab tsheb ciav hlau muaj xws li roj hmab, yas, thermoplastic elastomer thiab microcellular ua npuas ncauj cov ntaub ntawv. Cov roj hmab hauv paus daim hlau muaj qhov zoo elasticity thiab poob siab absorbing nyhuv, tab sis nws yog nquag mus rau aging thiab muaj ib tug luv luv kev pab cuam lub neej; cov ntaub ntawv yas muaj cov rigidity siab, tsis zoo dynamic mechanical zog thiab tus nqi qis; Cov ntaub ntawv thermoplastic elastomer muaj qhov yooj yim heev ntawm chav tsev kub thiab tsis kub, nrog rau qhov zoo tshaj plaws flex tawg tiv thaiv thiab kev ntxhov siab so; microcellular ua npuas ncauj cov ntaub ntawv muaj cov elastic rov qab ceev ceev thiab zoo heev creep kev ua tau zoo. Ethylene Propylene Diene Monomer (EPDM) yog cov khoom siv roj hmab uas siv tau, ua tau raws li Ministry of Railways 'TKTJ9904-1 tus qauv, nrog kev ua haujlwm ruaj khov thiab tus nqi nruab nrab. Lub hauv paus phaj ntawm cov khoom sib txawv yuav tsum tau xaiv raws li kab ib puag ncig thiab kev ua tau zoo kom sib npaug ntawm kev siv thiab tus nqi.
Dab tsi yog cov haujlwm tseem ceeb ntawm hauv qab -rail puag daim hlau?
Cov haujlwm tseem ceeb ntawm hauv qab - cov phiaj xwm kev tsheb ciav hlau muaj xws li kev poob siab thiab tsis muaj zog, hluav taws xob rwb thaiv tsev thiab kev tiv thaiv ntawm lub hauv paus khiav. Nws tuaj yeem cuam tshuam qhov siab - nrawm cuam tshuam kev co tsim thaum lub tsheb hla, txo qhov cuam tshuam quab yuam ntawm lub log thiab tsheb ciav hlau, thiab tiv thaiv cov subgrade thiab pw tsaug zog. Nyob rau hauv hluav taws xob railways, lub hauv paus phaj tuaj yeem paub txog hluav taws xob rwb thaiv tsev ntawm txoj kev tsheb ciav hlau thiab cov neeg pw tsaug zog kom tsis txhob muaj qhov cuam tshuam tam sim no cuam tshuam rau lub teeb liab. Los ntawm kev ua rau qhov tsis muaj kev nruj ntawm cov pob zeb pw tsaug zog, lub hauv paus phaj tuaj yeem txhim kho txoj kev elasticity, tswj kev tsheb ciav hlau nto smoothness thiab txo txoj kev sib haum xeeb. Nyob rau tib lub sijhawm, nws tuaj yeem cais cov suab nrov uas tsim los ntawm lub tsheb ciav hlau ua haujlwm thiab txhim kho kev caij tsheb. Cov haujlwm no ua ke ua kom muaj kev ruaj ntseg ntawm kev khiav haujlwm thiab txuas ntxiv lub neej kev pab cuam ntawm cov khoom siv khiav.
Hom dab tsi tuaj yeem nyob hauv - cov phiaj xwm kab tsheb ciav hlau tau muab faib ua raws li qhov chaw tso?
Hauv qab - cov ntawv hlau hauv qab tau muab faib ua elastic cushions ntawm lub hauv paus phaj thiab elastic cushions nyob rau hauv lub hauv paus phaj, bounded los ntawm hlau puag phaj. Lub cushion elastic ntawm lub phaj hlau yog nyob nruab nrab ntawm txoj kev tsheb ciav hlau thiab lub phaj hlau phaj, ncaj qha bearing lub load kis tau los ntawm txoj kev tsheb ciav hlau, nrog rau cov nyhuv buffering ncaj qha; lub cushion elastic nyob rau hauv lub hauv paus hlau phaj yog teem nyob nruab nrab ntawm cov hlau puag phaj thiab cov pw tsaug zog, thiab yog feem ntau dav siv nyob rau hauv Tuam Tshoj txoj kev, xws li lub hauv paus phaj rau WJ-1 thiab WJ-2 fasteners ntawm ballastless lem. Tsis tas li ntawd, muaj nyob rau hauv - pw tsaug zog elastic cushions thiab hauv qab - ballast elastic cushions. Lub hauv qab - pw tsaug zog elastic cushion yog siv nruab nrab ntawm lub sleeper thiab ballast, uas yuav txo tau lub tsheb dynamic load kis mus rau lub ballast txaj; nyob rau hauv -ballast elastic cushion yog muab faib ua under-ballast thiab under-concrete foundation hom, uas tuaj yeem txhim kho elasticity ntawm ballast txaj thiab txo ballast crushing thiab pulverization. Lub hauv paus daim hlau ntawm qhov chaw sib txawv muaj qhov sib txawv ua haujlwm thiab yuav tsum tau xaiv raws li tus qauv tsim qauv.
Cov kev ua haujlwm tshwj xeeb dab tsi ua rau hnyav - cov kab tsheb thauj mus los hauv qab - cov phiaj xwm tsheb ciav hlau?
Hnyav- cov kab tsheb thauj khoom muaj qhov thauj khoom loj thiab muaj kev cuam tshuam zoo, yog li lawv muaj kev ua haujlwm nruj dua rau hauv qab - cov phiaj xwm kev tsheb nqaj hlau. Ua ntej, nws yuav tsum muaj elasticity siab thiab zoo poob siab absorbs lub zog loj cuam tshuam los ntawm hnyav- tsheb ciav hlau thiab txo kev puas tsuaj rau subgrade; thib ob, nws yuav tsum muaj kev qaug zog zoo heev los tiv thaiv kev ua haujlwm degradation tshwm sim los ntawm ntev - lub sij hawm rov ua dua; Nyob rau tib lub sijhawm, nws yuav tsum muaj kev hnav tsis kam thiab kev laus ua haujlwm kom hloov mus rau qhov hnyav sab nraum zoov thiab txuas ntxiv kev pabcuam lub neej. Feem ntau hnyav- cov kab tsheb thauj khoom siv lub hauv paus daim hlau ua los ntawm cov khoom siv thermoplastic elastomer lossis microcellular ua npuas ncauj, uas muaj qhov zoo dua hauv cov khoom siv hluav taws xob zoo. Lub dynamic rigidity ntawm lub hauv paus phaj yuav tsum tau nruj me ntsis tswj los xyuas kom meej tsim nyog deformation amplitude nyob rau hauv ntsug dynamic quab yuam thiab muab tag nrho ua si rau lub buffering nyhuv.
Dab tsi yog cov qauv tsim qauv thiab cov xwm txheej siv tau ntawm hauv qab - cov phiaj xwm tsheb ciav hlau?
Cov qauv tsim ntawm hauv qab -rail base plates feem ntau suav nrog peb hom: tiaj tus qauv, zawj qauv thiab phaj ntsia hlau qauv. Cov qauv phaj tiaj tiaj muaj qhov tsim qauv yooj yim thiab tus nqi qis, thiab tsim nyog rau cov pa nrawm nrawm nrog cov khoom me me; cov qauv groove muab siab resilience los ntawm flexure thiab shear deformation, nrog ceev elastic rov qab ceev thiab tsis tshua muaj zog rigidity, haum rau pob tw railways nrog siab poob siab absorbing yuav tsum tau; lub phaj ntsia hlau qauv puag phaj muaj qhov loj deformation amplitude thiab zoo heev kev co kev sib cais kev ua tau zoo, uas tuaj yeem ua tau raws li qhov yuav tsum tau siv ntawm hnyav - tsheb thauj mus los thiab siab - tsheb ciav hlau ceev. Nrog rau kev loj hlob ntawm hnyav- tsheb thauj mus los thiab siab - txoj kev tsheb ciav hlau ceev, cov pav ca phaj qauv hauv paus phaj tau nyuaj ua kom tau raws li qhov yuav tsum tau ua kom zoo dua qub, thiab daim ntawv thov ntawm zawj thiab phaj ntsia hlau qauv puag daim hlau tau maj mam dhau los. Kev xaiv yuav tsum raug txiav txim siab raws li kab nrawm, theem thauj khoom thiab qhov xav tau ntawm kev poob siab.