Kev xaiv cov khoom siv tseem ceeb thiab cov kev xav tau rau Elastic Cushioning Performance of Rail Pads
Dab tsi yog cov ntaub ntawv tseem ceeb thiab cov ntaub ntawv tsim nyog rau kev tsheb ciav hlau?
Cov hom kev tsheb ciav hlau tseem ceeb yog cov ntaub qhwv roj hmab, cov ntaub ntawv roj hmab sib xyaw, thiab cov ntaub qhwv insulating. Cov ntaub ntawv raug categorized raws li kev taug qab cov xwm txheej thiab cov kev xav tau ua haujlwm, hloov mus rau qhov sib txawv ntawm kev siv scenarios. Rubber pads yog hom tseem ceeb siv rau cov pa railways thiab Hoobkas lem. Lawv yog tsim los ntawm ntuj roj hmab / nitrile roj hmab, muab zoo elasticity, tsis tshua muaj nqi, thiab zoo heev shock absorber, hnav tsis kam, thiab durability. Cov khoom siv roj hmab sib xyaw yog tsim tshwj xeeb rau kev siab - kev tsheb ciav hlau ceev thiab hnyav - thauj khoom. Lawv muaj ob - txheej roj hmab embedded nrog siab - lub zog steel los xij, muab ntau dua elasticity thiab rigidity, muaj zog tiv thaiv deformation, thiab haum rau siab - zaus tej yam kev mob. Insulating pads yog tsim tshwj xeeb rau kev siab - kev tsheb ciav hlau ceev thiab cov teeb liab lem. Lawv yog ua los ntawm insulating roj hmab los tiv thaiv luv luv Circuit Court. Insulating pads tsis tas yuav tsum tau rau cov pa railways yam tsis muaj teeb liab yuav tsum tau. Roj-cov roj hmab tiv taus yog siv rau kev lag luam thiab cov mining lem los tiv thaiv roj corrosion thiab tshwj xeeb tsim rau cov chaw nres nkoj thiab steel mills. Txheem roj hmab pads yog txaus rau lem zoo tib yam.
Dab tsi yog cov ntsiab lus tseem ceeb thiab cov hom kev tsheb ciav hlau tsim nyog rau kev tsheb ciav hlau?
Rail ncoo specifications yog categorized raws li rail hom thiab thickness. Lub teb chaws tus qauv 50kg / m rails siv 10 hli tuab pads, 60kg / m rails siv 12 hli tuab pads, thiab 75kg / m rails siv 15 hli tuab pads, nrog thickness nce raws li rail load. Cov txheej txheem thoob ntiaj teb UIC50 rails siv 8 hli tuab European qauv pads, UIC60 rails siv 12 hli tuab pads, thiab American standard 136RE rails siv 10 hli tuab American standard pads, nrog rau qhov ntev sib piv cov rail puag dav. Composite pads yog 4-5mm nqaim dua li lub hauv paus kev tsheb ciav hlau kom tsis txhob muaj kev txav mus los ntawm kev thauj khoom. Rubber pads yog tib qhov dav raws li kev tsheb ciav hlau puag rau kev sib cuag thiab cushioning. High-cov ntaub ntawv ceev ceev yog kev cai- zoo li tus grooves los txhim kho elasticity thiab los tiv thaiv- cov khoom plam, thaum cov pa tsheb ciav hlau yog tiaj tus, nrog cov qauv yooj yim thiab kev tsim kho yooj yim. Lub QU70-120 crane rail yog nruab nrog 20mm tuab hnyav ua haujlwm ncoo, ua ob npaug rau nws qhov elasticity. Nws yog tsim tshwj xeeb rau kev lag luam thiab mining daim ntaub ntawv, tiv thaiv pad deformation thiab tsis ua hauj lwm nyob rau hauv siab.
Dab tsi yog qhov tseem ceeb ntawm elastic kev ua tau zoo thiab cov kev xav tau zoo rau lub tsheb ciav hlau?
Cov ntsiab lus tseem ceeb elastic rau lub tsheb ciav hlau yog ib qho elasticity ntawm 20-80kN/mm thiab compression deformation ntawm 3-5mm. Cov no yog cov txiaj ntsig tseem ceeb rau kev ua kom tsis muaj zog thiab kev faib khoom thauj khoom; tsuas yog pads ua tau raws li cov qauv no tuaj yeem siv tau. Lub Shore hardness ntawm cov roj hmab ncoo yog tswj ntawm 60-70 degrees. Lub hardness nruab nrab yog qhov tseem ceeb; over hardness ua rau tsis zoo buffering, thaum ntau softness ua rau deformation. Cov ntaub ntawv sib xyaw muaj qhov hardness ntawm 70-75 degrees thiab yog tsim tshwj xeeb rau kev siv hnyav. Tom qab 1 lab cycles ntawm compression qaug zog kuaj, lub ncoo qhia tias tsis muaj elasticity lwj, tawg, los yog detachment. High-speed rail pads yuav tsum tau ntxiv qhov kub thiab txias (-25 degree) elasticity xeem ua ntej tawm hauv lub Hoobkas. Lub ncoo yuav tsum ua kom tau raws li qhov yuav tsum tau ua rau kev laus ua haujlwm, tiv thaiv roj, thiab ua haujlwm rau qhov kub thiab txias. Nws qhov kev khiav hauj lwm kub yog -25℃mus rau 80 degree, kom tsis txhob muaj kev laus los yog tawg ntawm sab nraum zoov rails thiab ncua nws cov kev pab cuam lub neej. Qhov saum npoo ntawm cov ntaub qhwv yuav tsum tiaj tus, tsis muaj npuas thiab tsis muaj nplaum nplaum, tsis muaj kev puas tsuaj rau cov npoo. Lub rwb thaiv tsev tiv thaiv ntawm cov ntaub thaiv insulating yuav tsum muaj ntau dua lossis sib npaug ntawm 10^8Ω txhawm rau tshem tawm qhov kev pheej hmoo ntawm kev xau.
Dab tsi yog cov ntsiab lus tseem ceeb ntawm kev tsim kho thiab kev lees txais cov ntsiab lus rau kev taug qab pad installation?
Ua ntej txhim kho cov ntaub ntawv taug qab, qhov saum npoo ntawm lub txaj pw yuav tsum tau ntxuav kom tshem tawm cov impurities, roj stains, thiab protrusions. Xyuas kom cov ntaub ntawv taug qab yog nteg tiaj, tsis muaj cov npoo curled los yog qhov khoob, thiab haum snugly tiv thaiv lub sleeper thiab rail. Cov ntaub qhwv yuav tsum muab tso rau hauv nruab nrab ntawm txoj kab nruab nrab ntawm txoj kab tsheb ciav hlau, nrog qhov sib txawv tsawg dua lossis sib npaug li ± 2 hli. Cov kab nrib pleb ntawm cov ntaub ntawv sib xyaw ua ke yuav tsum ua raws li cov kev taw qhia kev tsheb ciav hlau txhawm rau txhim kho cushioning thiab tiv thaiv- cuam tshuam; rov qab installation yog nruj me ntsis txwv tsis pub. Thaum lub sij hawm installation, nteg tus khiav pad ua ntej, ces txo lub tsheb ciav hlau kom tsis txhob lub tsheb ciav hlau ua rau khiav pad. Cov ntaub ntawv taug qab yuav tsum tsis muaj wrinkles thiab kev puas tsuaj, thiab haum rau tag nrho cov tsheb ciav hlau puag yam tsis muaj qhov khoob. High-Speed rail khiav pads yuav tsum xyuas kom muaj rwb thaiv tsev; Tom qab kev teeb tsa, lub rwb thaiv tsev yuav tsum tau kuaj. Fastening accessories tsuas tuaj yeem ntsia tau tom qab qhov kev tiv thaiv ua tau raws li tus qauv. Tsis muaj kev ntsuas rwb thaiv tsev rau cov tsheb ciav hlau zoo tib yam. Cov ntsiab lus tseem ceeb ntawm kev lees txais: Lub tsheb ciav hlau yuav tsum tsis txhob hloov lossis deform; txoj kev tsheb ciav hlau yuav tsum tsis txhob muaj kev hloov chaw ntsug; cov nyhuv cushioning yuav tsum zoo; yuav tsum tsis muaj suab nrov txawv txav thaum lub caij tsheb ciav hlau ua haujlwm; thiab lub tsheb ciav hlau yuav tsum tsis txhob cuam tshuam nrog lub sleeper lossis tsheb ciav hlau.
Dab tsi yog cov teeb meem tshwm sim thiab kev saib xyuas / kev ntsuas kev ntsuas rau kev tsheb ciav hlau thaum siv?
Feem ntau cov teeb meem nrog cov tsheb ciav hlau muaj xws li elasticity decay, hnav thiab tsim kua muag, hloov thiab warping, rwb thaiv tsev tsis ua hauj lwm, thiab aging cracking. Tag nrho cov no yuav tsum tau hais tam sim ntawd txhawm rau tiv thaiv kev khiav damping tsis ua hauj lwm thiab ceev tsheb ciav hlau hnav. Elasticity decay yog tshwm sim los ntawm ntev -lub sij hawm siab qaug zog. Hloov lub ncoo nrog ib qho tshiab; rau hnyav- cov kab thauj khoom, hloov mus rau cov ntaub ntawv sib xyaw kom txo tau qhov tshwm sim ntawm kev lwj. Tsis tu ncua xyuas cov elasticity. Hnav thiab tsim kua muag Ntau dua lossis sib npaug li 2 hli qhia tias qhov txo qis hauv lub ncoo lub peev xwm cushioning; hloov nws tam sim ntawd los tiv thaiv kev sib cuag ncaj qha ntawm txoj kev tsheb ciav hlau thiab cov neeg pw tsaug zog, uas yuav ua rau ob leeg hnav ntawm ob qho tib si. Hloov thiab warping yog tshwm sim los ntawm misalignment los yog tsis ruaj ntseg kho. Recalibrate lub ncoo txoj hauj lwm, nyob nruab nrab ntawm nws, thiab nruab qhov chaw clips ntawm composite pads los tiv thaiv lateral hloov. Kev rwb thaiv tsev tsis ua haujlwm yog tshwm sim los ntawm cov txheej txheem rwb thaiv tsev puas. Hloov cov ntaub qhwv insulating, tshawb xyuas cov kab hluav taws xob kom tiv thaiv luv luv, thiab tsis txhob khawb cov txheej rwb thaiv tsev nrog cov khoom ntse thaum lub sijhawm teeb tsa. Kev laus thiab tawg yog tshwm sim los ntawm sab nraum zoov raug tshav ntuj thiab los nag. Hloov cov laus- cov ntaub qhwv uas tiv taus, ntxiv txheej tiv thaiv rau txoj kev taug, ncua kev pabcuam lub neej ntawm cov ntaub qhwv, thiab ua tiav kev tshuaj xyuas thiab hloov txhua 3 xyoos.