Lub Rail Pad Ua li cas hauv qab Txoj Kev
Ib lub tsheb ciav hlau zaum ntawm lub tsheb ciav hlau ko taw thiab lub rooj zaum pw tsaug zog, thiab nws ua haujlwm plaub zaug ib zaug. Ua ntej, nws faib lub zog ntawm lub log tsheb thauj khoom los ntawm kev tsheb ciav hlau ko taw hla thaj tsam dav ntawm tus neeg pw tsaug zog, txo cov neeg pw tsaug zog puas thiab tawg. Qhov thib ob, nws absorbs lub zog cuam tshuam los ntawm lub log flats, rail pob qij txha thiab weld irregularities, txiav kev co kis mus rau hauv lub txaj khiav. Thib peb, nws muab hluav taws xob rwb thaiv tsev ntawm ob txoj hlua kom taug qab circuits thiab signaling systems ua haujlwm tau zoo. Thib plaub, nws tswj cov ntsug nruj ntawm lub fastening system, uas ncaj qha cuam tshuam rau kev nplij siab thiab lub zog dynamic dhau mus rau lub ballast. Vim tias cov kev xav tau no rub rau hauv cov lus qhia sib txawv - cov ntaub mos mos damp zoo tshaj plaws, cov ntaub qhwv tawv tawv nqa tau zoo tshaj plaws - cov ntaub qhwv thiab cov duab kos yuav tsum raug xaiv rau cov kab ntawv es tsis yog luam los ntawm lwm qhov project.
Cov Tsev Neeg Khoom Siv thiab Lawv Tus Cwj Pwm
Cov roj hmab pads yog tsim los ntawm cov roj hmab ntuj, styrene-butadiene roj hmab (SBR), nitrile roj hmab (NBR) lossis EPDM, feem ntau sib xyaw nrog cov khoom ntim thiab tiv thaiv - cov neeg laus. Lawv muab siab elasticity, zoo poob siab absorbing thiab ruaj khov kev ua tau zoo nyob rau hauv ib tug dav kub ntau yam, thiab lawv yog tus qauv xaiv rau ballasted khiav qhov kev co damping yog qhov tseem ceeb. HDPE (siab-density polyethylene) pads yog nruj thiab ruaj khov, nrog rau cov rwb thaiv tsev siab heev; lawv haum rau hnyav-haul thiab siab- daim ntawv thov nruj qhov twg nkag hauv qab yuav tsum tsawg heev. EVA (ethylene-vinyl acetate copolymer, feem ntau 80% polyethylene thiab 20% vinyl acetate los ntawm qhov hnyav) zaum ntawm ob: nws hloov tau ntawm qhov kub thiab txias, lub teeb yuag thiab yooj yim rau nruab, thiab feem ntau siv rau hauv tram thiab lub teeb tsheb ciav hlau qhov twg ob qho tib si damping thiab kev lag luam teeb meem. Qib ntawm raw cov ntaub ntawv polymer, tsis yog tsev neeg lub npe ib leeg, txiav txim siab qhov kev ua tau zoo kawg, yog li cov lus tsis sib xws yuav tsum tau kuaj xyuas txhua yam ntawm qhov project specification.
Technical Parameters: Nyeem Cov Lus Qhia Tshwj Xeeb
Peb lub rooj hauv qab no muab cov kev ntsuas tsis zoo rau cov roj hmab, HDPE thiab EVA rail pads. Kev nruj yog qhia hauv kN / mm, hardness nyob rau hauv Shore A, hluav taws xob kuj nyob rau hauv ohms, thiab tensile zog thiab elongation yog ntsuas ua ntej hnub nyoog. Xyuas kom tseeb tias chav tsev ntawm qhov tawv nqaij yog kN / mm es tsis yog ib tug dimensionless, thiab hais tias hardness yog qhia nyob rau hauv Shore A (los yog Shore D rau cov ntaub ntawv nyuaj heev), vim hais tias cov chav tsev sib tov yog ib tug ntau qhov chaw ntawm specification yuam kev.
| Rubber Rail Pad Parameter | Chav tsev | Tus nqi |
|---|---|---|
| Kev nruj | kN / hli | 90-130 |
| Hardness | Ntug A | 72-80 |
| Hluav taws xob tsis kam | Ω | Ntau dua lossis sib npaug li 1 × 10⁶ |
| Tensile lub zog ua ntej kev laus | MPa | Ntau dua lossis sib npaug rau 12.5 |
| Elongation ua ntej kev laus | % | Ntau dua lossis sib npaug li 250 |
| HDPE Rail Pad Parameter | Chav tsev | Kev Xav Tau | Tus nqi |
|---|---|---|---|
| Qhov ntom | g/cm³ | 0.95-0.98 | 0.95 |
| Tensile zog | MPa | Ntau dua lossis sib npaug rau 19 | 19 |
| Elongation | % | >80 | 150 |
| Melting point | degree | 170-190 | 190 |
| Rwb thaiv tsev tsis kam | Ω | Ntau dua lossis sib npaug rau 1 × 10¹⁰ | 3.5×10¹⁰ |
| Hardness | Ntug A | Ntau dua lossis sib npaug li 98 | 98 |
| EVA Rail Pad Parameter | Chav tsev | Kev Xav Tau | Tus nqi |
|---|---|---|---|
| Qhov ntom | g/cm³ | 0.95-0.98 | 0.95 |
| Tensile zog | MPa | Ntau dua lossis sib npaug li 15 | 16 |
| Elongation | % | >500 | 550 |
| Melting point | degree | 75-90 | raug rau 20% VA qib |
| Rwb thaiv tsev tsis kam | Ω | Ntau dua lossis sib npaug rau 1 × 10¹⁰ | 5.0×10¹⁰ |
| Hardness | Ntug A | Ntau dua lossis sib npaug li 90 | 92 |
Xaiv Pads rau E-Type thiab SKL Fastening Systems
E-hom thiab SKL- hom fastening systems yog ib qho ntawm cov qauv ntsuas thiab hnyav- tsheb ciav hlau, thiab lub ncoo yog tsim los rau hauv qhov system geometry: lub ncoo qauv, thickness thiab ntiv taw load ua hauj lwm nrog clip thiab lub xub pwg nyom los tsim lub hom phiaj nruj. Rau E- hom tshuab lub ncoo feem ntau muaj cov duab plaub tiaj tiaj uas sib xws nrog lub hauv paus phaj, thaum SKL systems feem ntau siv lub ribbed lossis recessed ncoo uas tuav rau hauv lub rooj tsav tsheb. Yog hais tias lub ncoo yuav tsum tau hloov, sib phim tsis yog tsuas yog cov qauv tab sis kuj cov chav kawm nruj, vim hais tias ib tug stiffer ncoo tsa lub load xa mus rau lub sleeper thiab ib tug softer ib tug tsuj roj rotation nyob rau hauv load. Cov khoom siv xaiv ua raws li qhov chaw ua haujlwm: HDPE qhov twg rwb thaiv tsev thiab ntev -lub sij hawm creep tsis kam yog qhov tseem ceeb, EVA qhov teeb yuag thiab qis - qhov kub thiab txias qhov teeb meem, thiab roj hmab qhov siab tshaj plaws damping yog xav tau ntawm cov neeg caij tsheb lossis metro kab.
Daim ntawv thov thaj chaw thiab kev txiav txim siab ntawm kev teeb tsa
Pad daim ntawv thov muaj nyob rau ntawm tram thiab lub teeb tsheb ciav hlau, qhov EVA pads khaws kev vibration thiab suab nrov qis qis qis qis, los ntawm cov qauv ntsuas cov neeg caij tsheb ciav hlau, qhov twg cov roj hmab pads sib npaug damping thiab stability, mus rau hnyav - cov kab, qhov twg HDPE los yog siab - cov roj hmab cov ntaub qhwv muaj kev sib tw siab heev. Nyob rau hauv metro systems, nyob rau hauv -rail pads feem ntau ua ke nrog nyob rau hauv - pw tsaug zog pads thiab floating slab tsim kom tau raws li nruj nreem txwv nyob rau hauv lub qhov. Thaum lub sij hawm kev teeb tsa, lub rooj tsav tsheb yuav tsum huv si thiab tsis muaj ballast chips, vim hais tias ib qho nyuaj particle daig nyob rau hauv lub ncoo ua ib qho kev ntxhov siab uas ua rau cov neeg pw tsaug zog. Cov ntaub qhwv yuav tsum tau muab cia kom deb ntawm qhov chaw tshav ntuj ncaj qha thiab ozone, thiab cov ntaub qhwv roj hmab yuav tsum tau kuaj xyuas qhov tawg ntawm qhov chaw, qhov chaw ruaj khov thiab qhov tawv tawv thaum lub sijhawm tu, vim tias cov no qhia tias muaj kev laus dua li hnav.
Cov lus nug nquag
Puas tuaj yeem hloov lub ncoo roj hmab los ntawm HDPE ncoo?Tsuas yog tias lub kaw lus fastening thiab pw tsaug zog yog tsim los rau qhov tshwm sim nruj. HDPE muaj zog ntau dua thiab xa cov dynamic loads ntau dua rau cov pw tsaug zog thiab ballast, yog li hloov cov khoom siv tsev neeg hloov tag nrho txoj kev thauj khoom. Txhua qhov kev hloov pauv yuav tsum raug lees paub raws li qhov yuav tsum tau ua kom nruj ntawm lub cev thiab qhov ntsuas ntawm cov khoom siv pw tsaug zog.
Dab tsi yog qhov txawv ntawm hauv qab -rail, hauv qab - pw tsaug zog thiab hauv qab - ballast pads?Lawv ua ntawm ntau theem ntawm cov qauv khiav. Hauv qab -rail pads zaum ntawm kev tsheb ciav hlau thiab pw tsaug zog thiab tswj kev nruj nruj; nyob rau hauv -pw tsaug zog pads zaum hauv qab lub sleeper thiab ntxiv elasticity rau tag nrho cov sleeper-ballast interface; nyob rau hauv - ballast mats tau pw hauv qab txheej ballast thiab feem ntau tswj kev co xa mus rau cov qauv. Lawv ua hauj lwm sib txawv thiab feem ntau ua ke ntawm cov seem rhiab.
Vim li cas cov lus qhia tshwj xeeb sau ob qho tib si tawv thiab tawv?Kev nruj piav qhia txog kev thauj khoom- deformation tus cwj pwm ntawm cov ntaub ntawv sib dhos hauv lub kaw lus fastening, thaum hardness yog cov khoom siv ntsuas ntawm cov roj hmab nws tus kheej. Ob lub ncoo nrog tib lub hardness tuaj yeem muaj qhov sib txawv vim qhov geometry, tav thiab cov ntsiab lus muab tub lim. Rau kev tsim qauv, kev nruj yog qhov ntsuas engineering; hardness yog qhov zoo -tswj parameter.
Yuav ua li cas kom paub meej tias rwb thaiv tsev tsis kam rau cov kab hluav taws xob khiav?Txheeb xyuas qhov ntim thiab qhov chaw tiv thaiv ntawm lub ncoo ntawm qhov kev khiav hauj lwm voltage thiab tom qab dej immersion, vim hais tias ntub dej paug tuaj yeem txo qhov kev tiv thaiv nto heev. Lub rooj nqi ntawm 1 × 10¹⁰ Ω los yog siab dua rau cov ntaub qhwv polymer yog ib txwm txaus rau 25 Hz thiab suab- zaus khiav circuits, tab sis ua tiav fastening los ua ke, nrog rau cov tsheb ciav hlau clips thiab baseplates, yuav tsum tau soj ntsuam raws li ib tug system.
Puas rail pads yuav tsum tau hloov nrog cov khoom qub?Cov ntaub ntawv hloov pauv yuav tsum phim cov chav kawm nruj thiab cov qauv, thiab cov khoom siv yuav tsum sib haum nrog cov huab cua hauv zos. Hauv cov cheeb tsam kub, cov ntaub qhwv roj hmab uas muaj zog dua thiab tiv thaiv -ozone tiv thaiv ntev dua; nyob rau hauv cheeb tsam txias, EVA los yog qis- cov roj hmab qib kub tiv thaiv embrittlement. Txheeb xyuas cov ntaub ntawv kev laus ua ntej hloov cov ntaub ntawv qib.