Txhais thiab Lub Luag Haujlwm ntawm Rail Pads
Ib lub tsheb ciav hlau zaum ntawm lub tsheb ciav hlau ko taw thiab lub txaj pw lossis lub hauv paus hauv lub tsheb ciav hlau fastening. Nws ua peb txoj haujlwm: nws faib lub log thauj khoom sib npaug mus rau lub rooj zaum pw tsaug zog, nws txo qis kev co thiab cuam tshuam los ntawm cov tsheb ciav hlau hla, thiab, qhov twg lub ncoo yog insulating, nws cais ob txoj hlua hluav taws xob rau kev khiav lag luam. Cov khoom siv Pad thiab geometry yog li cuam tshuam rau kev caij tsheb zoo, ua kom lub zog ruaj khov, taug qab kev txij nkawm thiab kev ntseeg tau ntawm lub teeb liab. Vim hais tias lub ncoo yog cov khoom siv polymer ua haujlwm nyob rau hauv qhov chaw ruaj khov, nws cov kev xaiv thiab nws cov kev laus tus cwj pwm ncaj qha txiav txim siab npaum li cas lub fastening system yuav tsum tau muab kev pab.
Kev sib piv ntawm Roj Hmab, Roj Hmab -Plastic Composite thiab Polyurethane Pads
| Khoom | Roj hmab ncoo | Roj hmab-plastic composite | Polyurethane ncoo |
|---|---|---|---|
| Hom Shore hardness | 50–60 | 60–70 | 70–80 |
| Elasticity / cushioning | Zoo heev | Zoo | Nruab nrab |
| Kev laus thiab hnav tsis kam | Nruab nrab | Superior | Zoo |
| Load peev thiab compression teeb | Nruab nrab | Zoo | Siab, qis mus tas li deformation |
| Tus nqi txheeb ze | qis tshaj | Nruab nrab | Siab tshaj |
| Tej daim ntawv thov | Siab - ceev thiab kab dav dav xav tau cushioning | Hnyav -load thiab cov kab ib txwm | Hnyav -cov kab tsheb thauj khoom |
Rubber pads, raws li cov roj hmab ntuj thiab styrene -butadiene roj hmab, nqus tsheb ciav hlau cuam tshuam lub zog zoo thiab pheej yig, uas piav qhia txog lawv txoj kev siv dav. Composite pads ntxiv qhov hnav tsis kam ntawm cov yas rau roj hmab elasticity thiab kav ntev dua ntawm cov kab hnyav -. Polyurethane pads nqa qhov hnyav tshaj plaws thiab tiv thaiv kev teeb tsa mus tas li, tab sis lawv cov cushioning tsis muaj zog thiab lawv cov nqi siab dua. Kev xaiv yuav tsum ua raws li txoj kab ntawm lub qag load, ceev, vibration yuav tsum thiab pob nyiaj siv.
Yam Uas Tsav Rail Pad Aging
Pad aging yog tswj los ntawm ib puag ncig thiab kev pabcuam ua haujlwm ua ke. Ultraviolet hluav taws xob oxidises lub polymer nto, ua rau hardening thiab cracking. Qhov kub thiab av noo txhawb nqa hydrolysis thiab pwm kev loj hlob, uas txo cov khoom siv kho tshuab. Cov tshuaj tsuag ntsev thiab kua qaub los yog alkali raug tawm tsam cov qauv molecular, softening lub ncoo thiab txo lub zog. Nyob rau hauv kev khiav tsheb, rov qab log loads ua rau compressive qaug zog uas maj mam txo elasticity, thaum tsis sib xws khiav geometry concentrates kev ntxhov siab nyob rau hauv lub zos thiab accelerates localized aging. Kev txhim kho precision tseem ceeb ib yam nkaus: lub ncoo compressed nruj heev tsis tuaj yeem deform thiab muaj hnub nyoog sai dua nyob rau hauv kev kub siab. Cov yam tseem ceeb no ua ke ua rau lub neej ua haujlwm luv, yog li ob qho tib si xaiv cov khoom siv thiab kev saib xyuas yuav tsum suav rau qhov chaw ua haujlwm tiag tiag.
Accelerated Aging Tests thiab Kev Ntsuas Lub Neej
Kev kuaj kev laus kom nrawm ua kom luv luv lub voj voog kev laus kom lub sijhawm ntev - tuaj yeem kwv yees tau sai. Cov hau kev tseem ceeb yog kub- huab cua aging, ultraviolet aging, damp- tshav kub laus thiab ntsev- tshuaj tsuag kev laus, thiab cov phiaj xwm kev sim yuav tsum ua kom haum rau qhov chaw khiav. Rau cov cheeb tsam kub, qhov kub -air aging test ntawm 70 degrees Celsius rau 1000 teev, ua raws li kev ntsuas ntawm tensile zog, elongation ntawm tawg thiab hardness, muab ib tug ncaj qha piv ntawm cov ntaub ntawv. Rau cov kab ntug dej hiav txwv, ntsev- kev tshuaj tsuag tsuag simulates chloride corrosion thiab xyuas lub ncoo qhov tsis kam. Kev ua haujlwm tsis zoo ua ntej thiab tom qab kev laus raug muab piv rau cov txheej txheem kev laus, piv txwv li tensile lub zog poob mus rau 70 feem pua ntawm tus nqi pib, thiab qhov kev pabcuam theoretical lub neej yog kwv yees los ntawm qhov degradation nkhaus. Tib txoj kev txhawb nqa cov khoom tsim nyog thiab kev sib piv tus neeg xa khoom thaum lub sijhawm yuav khoom.
Qhov yuav tsum tau muaj rau High -Speed Track Pads
High- cov kab ceev xav tau ib lub ncoo nrog lub elastic modulus nyob rau hauv thaj tsam ntawm 10-20 MPa thiaj li cuam tshuam lub zog yog absorbed yam tsis muaj zog heev, lub neej qaug zog ntawm tsawg kawg yog 3 lab cycles nyob rau hauv siab -frequency loading, thiab ruaj khov tus cwj pwm nyob rau hauv lub dav kub ntawm high - khiav ceev. Ntev - lub sij hawm deformation yuav tsum nyob rau hauv qhov kev txwv ntawm 15 feem pua kom cov kab geometry tsis cuam tshuam los ntawm kev sib haum xeeb. Hauv kev xyaum tam sim no, roj hmab-cov ntaub ntawv yas sib xyaw thiab hloov pauv polyurethane pads yog cov kev xaiv uas nyiam vim lawv ua tau raws li qhov xav tau ntawm elasticity, qaug zog thiab kub ib txhij.
Txhim kho qhov tsis xws luag deformation
Kev deformation tas mus li yog qhov poob ntawm elasticity uas tawm hauv lub ncoo tsis tuaj yeem rov qab los ntawm nws qhov qub thickness, thiab nws ncaj qha degrades cushioning thiab khiav stability. Rau me me deformation ntawm 0.5 hli los yog tsawg dua, ib qho elastic shim ntawm qhov sib txuam tuab tuaj yeem muab tso rau ntawm lub ncoo thiab pw tsaug zog kom them nyiaj rau qhov sib txawv qhov siab, nrog kev saib xyuas ntawm qhov chaw. Yog hais tias deformation ntau tshaj 0.5 hli, los yog lub ncoo yog tawg los yog puas, nws yuav tsum tau hloov nrog ib tug tshiab ncoo ntawm tib yam khoom, thickness thiab specification, thiab lub rooj zaum pw tsaug zog yuav tsum tau ntxuav ntawm cov khib nyiab thiab xeb ua ntej haum kom tsis txhob muaj qhov khoob thiab tsis sib xws. Qhov laj thawj tseem ceeb yuav tsum tau tshawb xyuas: yog tias qhov tsis ua tiav yog qhov yuam kev xaiv, cov khoom siv qib lossis elastic modulus rau kev txiav txim yav tom ntej yuav tsum tau hloov kho; Yog hais tias nws yog overload, khiav load los yog lub ncoo specification yuav tsum tau tshuaj xyuas.
Cov lus nug nquag
Cov khoom siv tsheb ciav hlau twg haum rau hnyav - cov kab tsheb thauj khoom?
Polyurethane pads yog qhov zoo dua rau hnyav - cov kab tsheb vim tias lawv qhov siab tawv thiab qis compression teeb tiv thaiv kev deformation mus tas li nyob rau hauv siab qag loads, txawm tias lawv cov cushioning tsawg dua roj hmab.
Vim li cas cov roj hmab ncoo tseem siv dav rau hauv siab - cov kab ceev?
Rubber pads muab qhov zoo tshaj plaws rau kev nqus ntawm tus nqi nruab nrab, thiab nrog kev xaiv ceev faj lawv ua tau raws li qhov xav tau ntawm elasticity thiab qaug zog ntawm kev ua haujlwm siab -. Composite thiab hloov kho polyurethane pads yog siv qhov kev laus tiv thaiv thiab kev thauj khoom muaj peev xwm yog qhov txiav txim siab.
Yuav ua li cas pad aging kuaj ua ntej yuav khoom?
Kub- huab cua aging ntawm 70 degrees Celsius rau 1000 teev, damp- tshav kub laus, ultraviolet aging thiab ntsev-Txoj kev laus yog cov txheej txheem ceev ceev. Lub zog tensile, elongation thiab hardness yog ntsuas ua ntej thiab tom qab, thiab 30 feem pua tej zog tensile yog ib qho kev hloov pauv.
Dab tsi ua rau lub tsheb ciav hlau ua kom tawv thiab tawg?
Cov hluav taws xob ultraviolet, kub kub thiab ozone ua rau oxidative decomposition ntawm cov polymer, uas ua rau cov tawv nqaij tawv thiab ua rau tawg, tshwj xeeb tshaj yog nyob rau hauv cov huab cua kub, tshav ntuj.
Lub ncoo nrog me ntsis deformation puas tuaj yeem nyob twj ywm hauv kev pabcuam?
Deformation ntawm 0.5 hli los yog tsawg dua tuaj yeem them nrog elastic shim thiab saib xyuas. Tshaj li qhov pib ntawm lub ncoo yuav tsum tau hloov, vim hais tias cushioning thiab geometry tsis tuaj yeem rov qab ua lwm yam.
Vim li cas lub installation precision tseem ceeb rau lub neej ncoo?
Ib qho dhau - compressed ncoo tsis tuaj yeem deform elastically nyob rau hauv load thiab muaj hnub nyoog sai dua nyob rau hauv kev kub siab, thaum lub ncoo xoob txav thiab hnav. Cov rooj zaum huv thiab raug preload yog qhov yuav tsum tau ua ua ntej rau lub neej ua haujlwm tsim.