Clamping Force txhais tau li cas rau Clip
Clamping quab yuam, los yog ntiv taw load, yog lub zog ntsug uas lub clip nias lub tsheb ciav hlau ko taw tiv thaiv lub ncoo thiab pw tsaug zog. Nws yog qhov ua haujlwm tsis zoo ntawm lub kaw lus fastening: nws tuav txoj kev tsheb ciav hlau mus rau qhov ntsuas, muab qhov ntev thiab sab nraub qaum uas tiv thaiv kev tsheb ciav hlau nkag thiab buckling, thiab ua rau lub kaw lus nruj ntawm tus nqi ntawm tus qauv tsim. Rau cov txheej txheem elastic fastening cov ntiv taw load feem ntau yog nyob rau hauv thaj tsam ntawm 7 mus rau 12 kN ib clip, teem los ntawm lub cev kos duab thiab txheeb xyuas ntawm lub tshuab kuaj; Txoj kev sim rau clamping quab yuam yog txhais nyob rau hauv EN 13146 series, thiab cov kev ua tau zoo ntawm cov tshuab ua tiav ntawm cov pob zeb ua haujlwm tau muab rau hauv EN 13481-1 thiab EN 13481-2. Vim tias cov ntiv taw thauj khoom tsis tuaj yeem pom hauv kev pabcuam, kev saib xyuas tswj nws los ntawm kev tshuaj xyuas lub zog rau lub zog torque-set systems, deflection los yog gap checks rau clip systems, thiab ncua sij hawm ntiv taw-load ntsuas nrog lub ntsuas ntsuas.
Txoj Cai Attenuation: Peb Theem
Clamping quab yuam decays nyob rau hauv peb theem. Theem ib yog theem kev sib hais haum, thawj ib mus rau peb lub hlis tom qab kev teeb tsa lossis tom qab kab rov ua dua tshiab: lub ncoo yuav siv sij hawm tas li, lub rooj zaum pw tsaug zog, thiab qhov chaw ua haujlwm clip txav, yog li cov ntiv taw thauj khoom poob sai tshaj plaws nyob rau lub sijhawm no, feem ntau yog 10 mus rau 20 feem pua ntawm cov nqi pib. Theem ob yog lub sijhawm ua haujlwm ruaj khov: lub ncoo tau ruaj khov, thiab qhov seem poob los ntawm kev ntxhov siab qeeb ntawm lub caij nplooj ntoos hlav steel, fretting hnav ntawm clip-rail contact thiab nto corrosion, muab ib tug maj mam downward trend uas yuav tswj tau raws sij hawm xyuas. Theem peb yog lub degradation theem: lub clip tau poob ntau deflection ua hauj lwm uas cov ntiv taw load poob qis hauv qhov system yam tsawg kawg nkaus, cov tsheb ciav hlau pib txav mus rau hauv load, thiab lub fastening coj ntau thiab ntau raws li ib tug nruj system, accelerating hnav ntawm lub ncoo thiab rail ko taw. Cov duab ntawm qhov nkhaus yog tib yam rau txhua qhov elasticity; Dab tsi hloov yog lub sijhawm teev, uas nyob ntawm kev khiav tsheb, nkhaus qhov hnyav thiab ib puag ncig.
Vim li cas Curves thiab Gradints Poob Clamping Force sai dua
Attenuation tsis sib xws raws kab. Ntawm qhov nkhaus, lub log siv lub zog sab nraud rau lub taub hau tsheb ciav hlau, qhov clip ua haujlwm nrog txoj kev thauj khoom yooj yim dua, thiab cov chaw sib cuag pom fretting thiab hnav uas ib ntu ncaj tsis tau ntsib, yog li cov ntiv taw thauj khoom ntawm sab nraud ntawm txoj kab nkhaus decays sai dua li ntawm txoj kev ncaj. Ntawm gradients, lub longitudinal traction thiab braking rog yog siab dua, thiab nyob rau hauv sib koom seem qhov kev cuam tshuam ntawm qhov sib koom ua ke ntxiv dynamic load rau cov nyob ib sab clips. Qhov ua tau zoo yog qhov sib txawv: tom qab tib lub sijhawm ua haujlwm, cov clips ntawm curves thiab gradients tej zaum yuav yog 10 mus rau 20 feem pua hauv cov ntiv taw qis dua li lawv cov neeg nyob ze ntawm txoj kev ncaj, uas yog vim li cas kev soj ntsuam kev npaj cov qauv nkhaus thiab gradients ntawm tus nqi siab dua thiab vim li cas re- kev sib tw nruj pib ntawm sab nrauv ntawm txoj kab nkhaus.
Tsim lub Re-Tightening Cycle
Lub re- zawm voj voog ua raws li qhov nkhaus attenuation. Tom qab txoj kab qhib lossis rov ua dua tshiab, teem caij thawj zaug rov- nruj ib mus rau peb lub hlis tom qab, thaum lub sij hawm kev sib hais haum tau ua tiav lawm; qhov no ib zaug dhau los rov qab feem ntau ntawm cov ntiv taw thawj zaug thiab yog tus nqi tshaj plaws - kev saib xyuas zoo hauv lub neej ntawm lub cev. Tom qab ntawd, lub voj voog yog teem los ntawm qhov attenuation tus nqi ntawm seem: nyob rau siab -ceev thiab hnyav- cov kab thiab ntawm nkhaus, kos ntiv taw load lossis torque peb lub hlis twg; ntawm cov pa ncaj nraim, ob zaug hauv ib xyoos yog kev coj ua; thiab ib txwm npaj ib qho kev kuaj ua ntej lub caij ntuj no thiab tom qab lub caij kub, vim tias qhov kub siab tshaj plaws thauj cov fastening nyob rau hauv opposite lus qhia. Ntau dua li daim ntawv teev sijhawm ruaj khov, txoj hauv kev niaj hnub no yog qhov xwm txheej-raws li: piv txwv tus naj npawb ntawm cov clips ib mais, npaj tus ntiv taw- thauj khoom sib txawv, thiab rov- nruj lossis hloov thaum tus qauv txhais tau ze rau qhov tsawg kawg nkaus, yog li lub voj voog ceev ceev - txo qis ntawm qhov chaw ruaj khov.
Field Practice for Re-Tightening and Replacement
Qhov zoo ntawm re- zawm hla yog nyob ntawm cov ntsiab lus. Siv lub calibrated torque wrench los yog tus ntiv taw -load gauge teev los ntawm lub system, thiab re- nruj rau tus nqi kos, tsis dhau: dhau- deflection stresses lub caij nplooj ntoos hlav steel thiab shortens nws qaug zog lub neej. Ntxuav cov clip-rail tiv thaiv nto ua ntej rov- zawm, vim cov plua plav, xeb thiab ballast nplua hloov pauv tus nqi ntsuas thiab ua kom lub neej yav tom ntej. Tshawb xyuas cov clip raws li nws tau tuav: ib daim clip uas pom pom tawg, teeb tsa mus tas li, corrosion pitting lossis cov cuab yeej cim hauv thaj chaw ua haujlwm raug hloov, tsis rov- nruj, thiab tib yam siv rau cov clip uas tau raug ntaus los ntawm cov cuab yeej tamping. Tom qab hla dhau, xyuas qhov sib xws ntawm ntu: clips ntawm tib lub tsheb ciav hlau yuav tsum pom cov ntiv taw zoo ib yam, thiab ib qho clip uas sawv ntawm nws cov neeg nyob ze qhia tias muaj teeb meem ncoo lossis pw tsaug zog uas lub zog yuav tsis kho. Sau cov txiaj ntsig ntawm ib qho clip lossis ib pawg qauv, vim tias qhov sib txawv xyoo dhau los, tsis yog ib qho kev nyeem ntawv, yog qhov qhia txog kev saib xyuas seb lub voj voog puas yog.
Cov lus nug nquag
Q1: Dab tsi yog cov ntiv taw hnyav rau ib qho elastic clip?
Feem ntau 7 mus rau 12 kN ib clip, nyob ntawm qhov system thiab rail seem. Tus nqi raug kho los ntawm qhov system kos duab thiab txheeb xyuas raws li EN 13146-7 clamping force test tiv thaiv EN 13481-1 system yuav tsum tau.
Q2: Vim li cas clamping quab yuam poob sai tshaj plaws hauv thawj lub hlis?
Vim lub ncoo yuav siv sij hawm mus tas li thiab lub rooj zaum pw tsaug zog, txav qhov chaw ua haujlwm clip. Qhov kev txiav txim poob no feem ntau yog 10 mus rau 20 feem pua ntawm tus nqi pib thiab rov qab los ntawm thawj zaug rov- zawm.
Q3: Ntev npaum li cas clips yuav tsum rov- zawm?
Thawj zaug dhau ib mus rau peb lub hlis tom qab qhib, tom qab ntawd raws li qhov txo qis: peb lub hlis twg ntawm qhov siab - nrawm, hnyav- nqa thiab nkhaus, ob zaug hauv ib xyoos ntawm cov kab ncaj nraim, ib txwm ua ntej lub caij ntuj no thiab tom qab lub caij kub.
Q4: Vim li cas clips ntawm curves poob zog sai?
Curves ntxiv rau lub log sab nraud, ntau qhov kev sib txuas ntawm cov hlua khi thiab fretting ntawm qhov chaw sib cuag. Cov kev tsheb ciav hlau sab nrauv ntawm cov nkhaus feem ntau pom tias 10 mus rau 20 feem pua qis ntiv taw hnyav dua li kev ncaj nraim tom qab tib lub sijhawm ua haujlwm.
Q5: Puas yuav tsum tau muab cov clip deformed rov-tightened?
Tsis yog. Ib qho clip uas muaj qhov ruaj khov, tawg lossis pitting yog hloov. Re-tightening a deformed clip stresses over design and risks nkees nkees ntawm kev pab cuam.
Q6: Yuav ua li cas yog tias clamping quab yuam poob qis dua qhov tsawg kawg nkaus?
Lub tsheb ciav hlau poob tuav -down: longitudinal resistance drops, rail creep start, gauge widens and the pad wears sai. Qhov no yog lub sij hawm degradation, thiab qhov kev ua kom raug yog rov-txoj kev sib tw los yog hloov pauv ua ntej qhov teeb meem geometry tshwm sim.