Elastic rail stiffness classification tsim thiab adaptation scheme rau sib txawv khiav vibration txo yuav tsum tau
Dab tsi yog cov ntsiab lus nruj tsim ntawm W- hom elastic strips rau siab - cov kab tsheb ciav hlau ceev?
Cov qauv nruj ntawm W- hom elastic strips rau siab - cov kab tsheb ciav hlau ceev yuav tsum sib npaug ntawm ob qhov kev xav tau ntawm qhov siab ua ntej thiab tsis tshua muaj zog. Tus nqi txhav feem ntau yog tswj ntawm 30-40kN/mm kom tau raws li qhov yuav tsum tau muaj kev vibration txo nyob rau hauv siab- zaus vibration. Thaum lub sij hawm tsim, nws yog tsim nyog los optimize tus ntoo khaub lig-sectional loj ntawm elastic strip. Txoj kab uas hla ntawm nruab nrab arc seem yog qhov tseem ceeb cuam tshuam rau qhov nruj. Ua kom txoj kab uas hla los ntawm 1 hli tuaj yeem ua kom qhov tawv nqaij los ntawm 10kN / mm, uas yuav tsum tau muab xam kom raug kom haum rau lub hom phiaj nruj. Nyob rau tib lub sijhawm, nws yog ib qho tsim nyog los tswj qhov sib txawv ntawm qhov siab dawb thiab qhov siab ua haujlwm ntawm elastic strip, thiab qhov sib txawv yog tswj ntawm 8-10mm los xyuas kom meej tias cov elastic strip tuaj yeem muab ruaj khov ua ntej hauv lub xeev ua haujlwm. Nws tseem yog ib qho tsim nyog los soj ntsuam cov kev ntxhov siab ntawm cov hlua elastic los ntawm kev simulation finite element. Qhov siab tshaj plaws kev ntxhov siab yuav tsum tau tswj nyob rau hauv 70% ntawm cov khoom yield zog kom tsis txhob qaug zog tawg los ntawm kev co mus ntev. Thaum kawg, yuav tsum tau kuaj lub rooj ntev zaum. Nyob rau hauv 10⁷ kev vibration loads, qhov nruj attenuation tus nqi ntawm cov elastic strip yog tsawg dua los yog sib npaug li 5%, uas tuaj yeem ua tau raws li daim ntawv thov kev kub ceev railway kab.
Dab tsi yog qhov nruj zog ntsuas ntawm elastic strips rau hnyav -cov kab?
Qhov nruj ntawm elastic strips rau hnyav- cov kab yuav tsum tau nce mus rau 50-60kN/mm. Thawj qhov kev txhawb zog yog siv cov khoom siv zog siab dua, xws li 60Si2MnA lub caij nplooj ntoos hlav steel, uas nws lub zog tensile Ntau dua los yog sib npaug rau 1860MPa thiab lub zog tawm los ntau dua lossis sib npaug rau 1660MPa muab cov khoom siv rau kev ua kom muaj zog. Thib ob, nce tus ntoo khaub lig-sectional txoj kab uas hla ntawm elastic strip los ntawm cov pa 14mm mus rau 16mm, tus ntoo khaub lig-sectional cheeb tsam nce ntau dua 30%, thiab qhov tawv tuaj yeem nce li ntawm 40%. Nyob rau tib lub sijhawm, ua kom zoo dua cov qauv ntawm cov hlua elastic thiab ua kom qhov ntev ntawm qhov kawg ntawm caj npab. Ua kom ntev ntawm caj npab txhawb nqa los ntawm 15% tuaj yeem txhim kho qhov deformation tsis kam ntawm elastic strip. Nws kuj tseem tsim nyog los siv cov txheej txheem kho cua sov ntawm quenching + nruab nrab -kub tempering kom lub hardness ntawm elastic strip ncav cuag HRC45-50 thiab txhim kho cov elastic txwv ntawm cov khoom. Tsis tas li ntawd, txhim kho cov khoom siv tiv thaiv kev tiv thaiv ntawm qhov chaw sib txuas ntawm cov hlua elastic thiab cov tsheb ciav hlau kom tsis txhob muaj kev nruj ntawm cov hlua elastic los ntawm kev hnav thiab txuas nws lub neej kev pab cuam.
Dab tsi yog qhov kev lag luam optimization ntawm elastic strip stiffness rau tib yam - kev tsheb ciav hlau ceev?
Lub hauv paus ntawm kev lag luam optimization tswvyim ntawm elastic strip stiffness rau tib yam - kev tsheb ciav hlau ceev yog los txo cov nqi ntawm qhov chaw ntawm lub rooj sib tham daim ntawv thov. Tus nqi txhav tswj ntawm 20-30kN/mm tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm cov khoom siv yooj yim - cov kab ceev. Thawj qhov kev ntsuas kev ua kom zoo yog siv Q235 steel es tsis txhob siab - cov nqi caij nplooj ntoos hlav steel, thiab xyuas kom meej qhov nruj los ntawm kev kho cov txheej txheem kho cua sov. Normalizing kev kho mob raws li qhov qis-kub tempering ua rau cov khoom elastic ntawm cov khoom ua tau raws li qhov yuav tsum tau ua. Qhov thib ob, ua kom yooj yim rau kev tsim qauv ntawm cov hlua elastic, tshem tawm qhov nyuaj arc hloov pauv, thiab txais yuav ib txoj kab txhawb nqa caj npab kom txo tau qhov nyuaj ntawm kev ua pwm thiab cov nqi tsim khoom. Nyob rau tib lub sij hawm, tswj cov machining nyiaj pub dawb ntawm elastic strip, txo qhov nyiaj ntawm 2 hli mus rau 1 hli kom txo cov khoom pov tseg. Batch stamping txheej txheem kuj tseem siv tau los hloov cov txheej txheem forging, uas txhim kho kev tsim khoom ntau dua 50% thiab txo nqi tsev los ntawm 20%. Thaum kawg, los ntawm tus qauv tsim, sib sau ua ke qhov ntev ntawm cov hlua khi ntawm cov qauv sib txawv rau cov kev tsheb ciav hlau zoo tib yam, txhim kho ntau yam, thiab txo qis kev yuav khoom thiab tu cov nqi.
Dab tsi yog cov qauv txheej txheem thiab kev tswj xyuas cov ntsiab lus rau elastic strip stiffness kuaj?
Tus qauv txheej txheem rau kev ntsuam xyuas elastic strip stiffness yog qhov kev ntsuam xyuas zoo li qub. Lub tshuab kuaj cov khoom siv thoob ntiaj teb yog siv los thauj cov elastic strip kauj ruam ib kauj ruam, sau cov nqi thauj khoom sib txawv ntawm cov compression sib txawv, thiab tau txais tus nqi txhav los ntawm kev xam qhov piv ntawm qhov load rau deformation. Thaum lub sij hawm sim, nws yog ib qho tsim nyog los tswj qhov kev thauj khoom ceev, uas tau teem rau 1mm / min kom tsis txhob muaj kev thauj khoom ntau dhau los ua rau qhov kev ntsuas nruj dua. Thawj qhov kev tswj xyuas qhov tseeb yog cov qauv xaiv . 10 elastic strips raug xaiv los ntawm txhua pawg rau kev sim kom ntseeg tau tias tus neeg sawv cev ntawm cov qauv. Thib ob, tswj qhov ntsuas kub ntawm qhov ntsuas ib puag ncig, ua kom kub ntawm 20 ± 2 degree. Kev kub siab dhau los yog qis qis yuav cuam tshuam rau lub zog elasticity ntawm elastic strip, ua rau kev sim ua yuam kev. Nyob rau tib lub sijhawm, xyuas kom meej qhov ntsuas qhov tseeb ntawm lub tshuab kuaj, nrog lub zog ntsuas qhov tseeb Tsawg dua lossis sib npaug li ± 0.5% thiab qhov ntsuas qhov ntsuas qhov tseeb tsawg dua lossis sib npaug ± 0.01mm kom ntseeg tau qhov tseeb ntawm cov ntaub ntawv xeem. Thaum kawg, nws yog ib qho tsim nyog los kho cov ntaub ntawv xeem, tshem tawm qhov txawv txav thiab coj tus nqi nruab nrab, thiab qhov sib txawv ntawm tus nqi txhav yuav tsum tswj tsis pub dhau ± 3kN / mm.
Dab tsi yog qhov kev sib koom tes txo qis ntawm elastic strips ntawm qhov sib txawv nruj thiab hauv qab -rail pads?
Lub hauv paus ntawm kev sib koom tes kev co txo qis ntawm elastic strips ntawm qhov sib txawv nruj thiab nyob rau hauv -rail pads yog "kev sib txuas ntawm rigidity thiab saj zawg zog", uas absorbs lub zog vibration generated los ntawm lub tsheb ciav hlau ua hauj lwm los ntawm deformation coordination ntawm ob. Siab - tawv elastic strips yuav tsum tau sib phim nrog siab - elasticity nyob rau hauv - cov ntaub qhwv, xws li polyurethane pads. Cov strips elastic muab cov kev txwv kev tsheb ciav hlau ruaj khov, thiab cov ntaub qhwv tau nqus tau siab - zaus vibration. Kev koom tes ntawm ob leeg tuaj yeem ua rau muaj kev vibration attenuation ntau dua 60%. Tsawg- tawv elastic strips yog txuam nrog nruab nrab- elasticity pads, xws li cov ntaub qhwv roj hmab. Cov elastic strips lawv tus kheej tuaj yeem tsim tau qee yam ntawm elastic deformation thiab qhia txog kev txo qis kev co nrog cov ntaub qhwv, uas yog tsim rau cov kab ncaj nraim -cov kab nrawm nrog cov ntim nruab nrab. Thaum lub tsheb ciav hlau thauj khoom siv, cov hlua elastic ua ntej dhau los ua elastic deformation rau offset ib feem ntawm cov ntsug load, thiab cov seem load yog kis mus rau hauv qab -rail ncoo, uas ntxiv deforms kom nqus tau lub zog vibration. Nyob rau tib lub sijhawm, qhov nruj ntawm elastic strip yuav tsum ua kom haum rau elastic modulus ntawm lub ncoo. Yog hais tias qhov tawv nqaij ntawm elastic strip yog ntau dua li elastic modulus ntawm lub ncoo, nws yuav ua rau ntau deformation ntawm lub ncoo; Yog hais tias qhov nruj ntawm elastic strip me me dhau lawm, nws tsis tuaj yeem cuam tshuam txoj kev tsheb ciav hlau. Tsis tas li ntawd, kev pab cuam lub neej ntawm ob yuav tsum tau synchronized kom tsis txhob muaj qhov ua tsis tiav ntxov ntawm qee yam cuam tshuam rau tag nrho cov kev vibration txo cov nyhuv.