Kev tiv thaiv -cov thev naus laus zis thev naus laus zis thiab kev hloov pauv rau cov kev pabcuam sib txawv ntawm cov tsheb ciav hlau
Dab tsi yog qhov kev tiv thaiv- kev laus thev naus laus zis hauv qab - cov tsheb ciav hlau hauv siab - qhov kub thiab muaj zog ultraviolet hluav taws xob thaj chaw?
Lub hauv paus ntawm kev tiv thaiv - kev laus hauv qab - cov ntaub ntawv tsheb ciav hlau hauv siab - kub thiab muaj zog ultraviolet hluav taws xob thaj chaw yog los txhim kho huab cua tsis kam thiab ultraviolet tsis kam ntawm cov khoom. Ethylene Propylene Diene Monomer (EPDM) yog qhov nyiam, uas muaj cov qauv molecular ruaj khov thiab zoo heev ultraviolet aging kuj. Thaum lub sij hawm tsim khoom, 2%-3% ultraviolet absorber thiab 1%-2% antioxidant yuav tsum tau ntxiv rau cov roj hmab formula. Lub ultraviolet absorber tuaj yeem nqus tau lub zog ultraviolet, thiab cov antioxidant tuaj yeem tiv thaiv oxidative degradation ntawm roj hmab. Qhov saum npoo ntawm lub ncoo yuav tsum tau kho nrog cov tshuaj tiv thaiv- ultraviolet txheej nrog lub thickness ntawm 5-8μm. Cov khoom siv txheej yog acrylate resin, uas tuaj yeem tiv thaiv kev yaig ntawm ultraviolet rays ntawm sab hauv ntawm lub ncoo. Nyob rau tib lub sijhawm, ua kom zoo dua cov qauv tsim ntawm lub ncoo, txais yuav cov qauv honeycomb sab hauv los txhim kho cov cua sov dissipation kev ua tau zoo ntawm lub ncoo thiab txo cov thermal aging nyob rau hauv high-temperature ib puag ncig. Tsis tas li ntawd, nws yog ib qho tsim nyog los tswj qhov compression txheej txheem ntawm lub ncoo Tsawg dua lossis sib npaug li 20%. Qhov ntsuas no yog tus yuam sij rau kev ntsuas kev tiv thaiv kev laus, thiab nws tau kuaj pom los ntawm kev ntsuas kev sib zog ua kom pom tseeb kom ntseeg tau tias lub ncoo tsis muaj qhov pom tseeb kev laus tom qab ua haujlwm hauv qhov kub thiab muaj zog ultraviolet ib puag ncig rau ntau tshaj 5 xyoos.
Dab tsi yog qhov kev tiv thaiv -kev ua kom zoo tshaj qhov qub ntawm hauv qab - cov ntaub ntawv tsheb ciav hlau hauv thaj chaw ntub thiab corrosive?
Kev laus ntawm cov hauv qab - cov ntaub pua plag hauv cov chaw ntub dej thiab corrosive feem ntau yog tshwm sim los ntawm dej raus dej thiab tshuaj lom neeg corrosion. Lub tswv yim optimization yuav tsum pib los ntawm ob qho tib si xaiv cov khoom siv thiab kev tiv thaiv cov qauv. Chloroprene Roj Hmab (CR) raug xaiv los ua cov khoom siv, uas muaj cov dej tsis zoo thiab kev tiv thaiv corrosion, thiab nws qhov kev ua haujlwm attenuation tus nqi hauv cov kua qaub- puag ncig tsawg dua lossis sib npaug li 10% hauv ib xyoos. Raws li kev tsim qauv, kev sib khi ntawm ntug tsim yog saws, thiab cov npoo ntawm lub ncoo yog vulcanized thiab kaw kom tsis txhob ya raws thiab corrosive xov xwm los ntawm kev nkag mus rau hauv lub ncoo thiab ua rau cov roj hmab molecular saw. Nyob rau tib lub sijhawm, polyethylene dej thaiv txheej txheej ntxiv rau sab ntawm lub ncoo hauv kev sib cuag nrog cov neeg pw tsaug zog, nrog lub thickness ntawm 0.5-1mm, txhawm rau thaiv kev yaig ntxiv. Thaum lub sij hawm tsim khoom, nws yog ib qho tsim nyog yuav tsum nruj me ntsis tswj lub porosity ntawm lub ncoo Tsawg dua los yog sib npaug li 1%. Cov porosity siab dhau lawm yuav dhau los ua ib txoj hauv kev rau cov dej noo thiab corrosive media, ua kom cov ntaub qhwv aging. Tsis tas li ntawd, ib txheej ntawm cov dej tsis zoo geotextile yuav tsum tau muab tso rau hauv lub ncoo thaum lub sij hawm tso, nrog rau cov permeability coefficient tsawg dua los yog sib npaug li 10⁻⁷cm / s, tsim ob chav dej tiv thaiv kom ntev lub neej kev pab cuam ntawm lub ncoo.
Dab tsi yog qhov kev tiv thaiv - qaug zog kev laus ntsuas ntawm hauv qab - tsheb ciav hlau pads rau hnyav - cov kab tsheb?
Cov hauv qab -rail pads rau hnyav- cov kab tsheb thauj mus los yuav tsum tau nqa siab - zaus cyclic loads. Lub hauv paus ntawm kev tiv thaiv - qaug zog kev laus yog los txhim kho cov compression qaug zog ntawm cov khoom. Polyurethane elastomer yog qhov nyiam, uas muaj qhov zoo dua compression qaug zog dua li cov khoom siv roj hmab tsoos. Thaum lub sij hawm tsim khoom, nws yog ib qho tsim nyog los kho cov mis polyurethane, nce cov ntsiab lus nyuaj rau 35% -40%, thiab txhim kho lub zog compressive thiab tiv thaiv kev qaug zog ntawm cov khoom. Nyob rau tib lub sijhawm, cov txheej txheem compression molding vulcanization tau txais los ua kom ntseeg tau tias cov qauv sab hauv ntawm lub ncoo yog ib yam, tsis muaj npuas thiab impurities, thiab tsis txhob muaj qhov tsis xws luag ua rau qaug zog tawg qhov chaw. Lub thickness ntawm lub ncoo yuav tsum tau kho raws li lub qag load. Lub thickness ntawm lub ncoo rau 30t qag load kab yuav tsum yog 20mm, 5mm tuab dua li cov kab zoo tib yam, los txhim kho cov kabmob muaj peev xwm ntawm lub ncoo. Tsis tas li ntawd, lub ncoo yuav tsum tau ua ntej- compressed nrog pre{20}} compression npaum li cas ntawm 5% kom tshem tawm qhov pib deformation ntawm lub ncoo thiab txhim kho kev ruaj ntseg ntawm kev ua haujlwm ntev -. Los ntawm kev sim qaug zog, qhov tawv nqaij attenuation tus nqi ntawm lub ncoo nyob rau hauv 10⁷ cyclic loads tsawg dua los yog sib npaug li 8%, uas ua tau raws li kev tiv thaiv kev laus ntawm cov kab mob hnyav.
Dab tsi yog qhov ntsuas qhov ntsuas thiab ntsuas txoj hauv kev rau kev tiv thaiv - kev laus kev ua haujlwm ntawm hauv qab - cov ntaub ntawv tsheb ciav hlau?
Cov cim qhia txog kev tiv thaiv kev tiv thaiv - kev laus kev ua haujlwm hauv qab - rail pads feem ntau suav nrog tensile lub zog tuav tus nqi, elongation ntawm kev tuav tus nqi, compression teem tus nqi thiab huab cua tsis kam. Cov kev sim rau tensile lub zog tuav tus nqi thiab elongation ntawm qhov kev tuav pov hwm tus nqi yog: tso cov qauv ntaub qhwv rau hauv chav kuaj kev laus, simulate qhov kub, av noo thiab ultraviolet irradiation tej yam kev mob ntawm lub hom phiaj ib puag ncig, ua tensile xeem tom qab laus rau 1000 teev, thiab ib tug tuav tus nqi siab tshaj los yog sib npaug rau 70% yog tsim nyog. Cov txheej txheem compression yog kuaj los ntawm lub tshuab ntsuas compression. Compress lub ncoo rau deformation ntawm 25%, khaws cia ntawm 70℃rau 22 teev, ntsuas qhov deformation tom qab unloading, thiab deformation tus nqi tsawg dua los yog sib npaug li 25% yog tsim nyog. Kev ntsuas huab cua tsis zoo siv lub teeb xenon aging test chamber los simulate sab nraum zoov kev laus ib puag ncig. Tom qab 500 teev ntawm kev laus, saib seb lub ncoo nto puas muaj kab nrib pleb thiab chalking. Tsis pom kev laus yog tsim nyog. Thaum kuaj pom, 10 cov qauv yuav tsum tau muab coj los ntawm txhua pawg, thiab cov txiaj ntsig kev xeem tau nruab nrab kom ntseeg tau qhov tseeb ntawm cov ntaub ntawv tshawb pom.
Dab tsi yog qhov kev tiv thaiv- khov-thaw kev laus thev naus laus zis hauv qab - tsheb ciav hlau hauv thaj tsam alpine?
Kev laus ntawm hauv qab - tsheb ciav hlau pads hauv thaj tsam alpine feem ntau yog tshwm sim los ntawm khov -thaw cycles. Lub hauv paus ntawm kev tiv thaiv - khov- thaw aging yog los txhim kho qhov qis - kub toughness thiab Frost heave tsis kam ntawm cov khoom. Butyl Roj Hmab (IIR) raug xaiv, uas tseem tuaj yeem tswj tau zoo elasticity ntawm -40℃, thiab nws qhov kev ua haujlwm attenuation tus nqi tom qab khov -thaw cycles tsawg dua lossis sib npaug li 8%. Thaum lub sij hawm tsim khoom, 3%-4% plasticizer yuav tsum tau ntxiv rau hauv cov qauv roj hmab los txhim kho qhov qis- qhov kub thiab txias ntawm cov khoom thiab zam kom tsis txhob muaj qhov kub thiab txias ntawm qhov tawg. Sab hauv ntawm lub ncoo yuav tsum tau ntxiv nrog cov elastic fiber reinforcement txheej, cov khoom siv fiber ntau yog nylon, thiab cov tuab ntawm cov txheej txheem yog 2-3mm, uas tuaj yeem txhim kho cov te heave tsis kam ntawm lub ncoo thiab tiv thaiv cov ntaub qhwv tawg los ntawm khov-thaw mus. Nyob rau tib lub sijhawm, tswj cov Shore hardness ntawm lub ncoo ntawm 55-60HD. Lub hardness ntau dhau yuav txo qis qhov kub thiab txias, thiab qhov hardness ntau dhau yuav ua rau muaj peev xwm tsis txaus. Tsis tas li ntawd, lub ncoo yuav tsum raug kuaj kom khov-thaw lub voj voog. Txias lub ncoo ntawm -40℃rau 12 teev, ces thaw ntawm 25℃rau 12 teev. Tom qab 50 lub voj voog, sim ua haujlwm. Lub zog tensile tuav tus nqi siab dua lossis sib npaug li 80% yog tsim nyog los xyuas kom meej qhov kev pabcuam ruaj khov ntawm lub ncoo hauv thaj tsam alpine.