1. Yuav ua li cas siab - ceev rail fastening systems txawv ntawm cov nyob rau hauv freight railways?
High-cov tshuab ceev (Ntau dua lossis sib npaug li 300km / h) siv qis-profile elastic clips (piv txwv li, Vossloh 300) kom txo qis aerodynamic luag, nrog qhov nruj nruj (± 2kN) kom txo qis kev co. Lawv tau ua ke nrog ballastless lem rau kev ruaj ntseg, siv los tiv thaiv - vibration ncoo. Lub tshuab thauj khoom tseem ceeb ua ntej hnyav- lub luag haujlwm nruj bolts (M24+) thiab cov tshuab ntxhua khaub ncaws hnyav los tuav 30- tuj qag loads, nrog lub zog siab dua (600-800Nm) rau tuav. High- cov fasteners tau dhau los kuaj lub suab nrov (tsawg dua lossis sib npaug li 75dB), thaum cov khoom thauj khoom tsom rau qhov cuam tshuam (Ntau dua lossis sib npaug rau 50J). Khoom siv- ntse, siab ceev siv hlau alloy (10.9 qib), freight carbon steel (8.8 qib) rau nqi.
2. Dab tsi yog lub luag haujlwm ntawm cov tshuab ntxhua khaub ncaws hauv kev tsheb ciav hlau fastening?
Cov tshuab ntxhua khaub ncaws faib cov clamping quab yuam, tiv thaiv kev pw tsaug zog / kev puas tsuaj: cov tshuab ntxhua khaub ncaws hauv qab bolts kis tau siab ntawm kev tsheb nqaj hlau, thaum lub caij nplooj ntoos hlav ntxhua khaub ncaws ntxiv nro kom tiv thaiv loosening. Nyob rau hauv pob zeb pw, hardened washers zam indentation; nyob rau hauv ntoo pw, loj -inch washers tiv thaiv kev sib cais. Rwb thaiv tsev ntxhua khaub ncaws (yas / ceramic) rhuav cov kab hluav taws xob hauv cov kab hluav taws xob. Serrated washers txhim khu kev tuav ntawm qhov chaw du (xws li, cov neeg pw tsaug zog sib xyaw), txo cov txiv ntoo tig. Cov tshuab ntxhua khaub ncaws yuav tsum sib phim qhov loj me -M20 bolts siv 30mm tshuab ntxhua khaub ncaws{10}} txhawm rau xyuas kom muaj kev sib faib quab yuam.
3. Yuav ua li cas fastening systems nyob rau hauv nroog metro network txawv ntawm mainline railways?
Metro systems siv compact, suab nrov -dampening fasteners (xws li, Pandrol Vanguard) nrog roj hmab ncoo los txo kev co nyob rau hauv cov cheeb tsam. Lawv feem ntau insulated kom tsis txhob cuam tshuam nrog subway signaling thiab haum rau hauv nruj tunnels (tsawg profile). Lub tshuab tseem ceeb tseem ceeb tshaj qhov ua tau zoo tshaj qhov loj, siv cov clips loj dua thiab cov ntsia hlau ntev ntev - kev ntseeg tau nyob deb. Metro fasteners yog nyob ze (400mm) rau kev nres tsis tu ncua, thaum mainlines siv dav dav (500-600mm). Metro systems kuj siv corrosion{11}}cov coatings resistant (epoxy) los tiv thaiv de{12}}icing ntsev, tsis zoo li mainlines nyob rau hauv cov cheeb tsam nyob deb nroog.
4. Dab tsi yog cov ntaub ntawv thiab kev kho rau corrosion -resistant fastening systems?
Corrosion-tiv thaiv tshuab siv: kub-dip galvanization (zinc txheej, 85μm+) rau cov kab ntug hiav txwv; zinc-nickel plating (5–10μm) rau thaj chaw muaj; epoxy txheej (100-150μm) rau kev thauj mus los hauv nroog; thiab stainless hlau (316 qib) rau kev raug ntsev heev (xws li, txuas hniav). Hauv thaj chaw ntub dej, kev txi anodes (zinc blocks) txuas rau hauv paus daim hlau tiv thaiv galvanic corrosion. Kev kho mob xws li chromate hloov dua siab tshiab txheej ntxiv txheej tiv thaiv, thaum lubricants (graphite{14}}raws li) txo cov dej noo nkag mus rau hauv cov xov. Cov kev ntsuas no txuas ntxiv lub neej ntawm 10 mus rau 25+ xyoo nyob rau hauv ib puag ncig hnyav
5. Yuav ua li cas elastic fasteners (piv txwv li, Pandrol, Vossloh) tuav nro lub sij hawm?
Elastic fasteners yog cua sov- kho kom ua tiav lub caij nplooj ntoos hlav-zoo li "elastic range"-lawv deform nyob rau hauv kev teeb tsa tab sis rov qab mus rau qhov zoo, tuav nruj. Lawv cov qauv nkhaus khaws lub zog, uas tiv thaiv kev tsheb nqaj hlau thiab kev co. Cov ntaub ntawv zoo li 60Si2Mn caij nplooj ntoos hlav steel muaj lub zog tawm los siab (Ntau dua lossis sib npaug rau 1200MPa), xyuas kom lawv tsis txhob ncab mus tas li. Kev ntsuas nruj tsis tu ncua (siv cov ntsuas ntsuas) xyuas lawv nyob hauv 20-30kN; yog tias qis dua 15kN, rov- zawm lossis hloov yog xav tau. Qhov tsis muaj qhov txav mus los (tsis zoo li cov bolts) txo qis kev pheej hmoo, ua rau lawv ntseeg tau ntev dua -lub sijhawm.