Correlation Control ntawm Siab Phaj Installation Eccentricity thiab Rail Longitudinal Creep
Vim li cas eccentric installation ntawm siab daim hlau ua rau longitudinal rail creep?
Longitudinal rail creep stems los ntawm lub tsheb ciav hlau traction thiab braking rog. Nyob rau hauv ib txwm muaj, symmetrically ntsia siab daim hlau tsim ib tug ntev longitudinal tiv thaiv kom sib npaug cov sab nraud rog. Eccentric installation hloov qhov kev sib cuag ntawm lub phaj thiab kev tsheb nqaj hlau, offsetting lub longitudinal kuj daim ntawv thov taw tes thiab tsim ib lub sij hawm ntxiv. Nyob rau hauv lub tsheb ciav hlau traction, lub tsheb ciav hlau tig me ntsis nyob ib ncig ntawm lub eccentric resistance point, ua rau longitudinal hloov. Qhov kev hloov pauv no sib sau ua ke nyob rau hauv kev rov ua dua, nws thiaj li tsim cov tsheb ciav hlau tseem ceeb.
Ob hom phaj siab installation eccentricity yog dab tsi, thiab lawv txawv li cas ntawm lawv qhov cuam tshuam rau kev tsheb ciav hlau nkag?
Eccentricity muab faib ua "longitudinal eccentricity" thiab "lateral eccentricity." Longitudinal eccentricity (offset raws qhov ntev ntawm txoj kev tsheb ciav hlau) ncaj qha nce qhov kev ncua deb ntawm qhov sib txawv, ua kom lub unidirectional rail creep nyob rau hauv cov kev taw qhia traction - feem ntau nyob rau hauv braking seem ntawm ntev downgrades. Lateral eccentricity (offset raws txoj kab dav dav) cuam tshuam txoj kev tsheb ciav hlau mus rau lub sijhawm ntxiv, ua rau tib lub sijhawm ntev nkag mus thiab txav mus rau sab nraud, ua rau ntsuas qhov dav. Ob hom kev sib koom ua ke feem ntau sib koom ua ke, ua rau muaj kev sib koom ua ke ua rau muaj kev cuam tshuam ntawm cov kab lus geometry.
Tshaj li qhov txwv tsis pub ncua ntev txoj kab tsheb ciav hlau nkag mus rau txoj kab kev nyab xeeb ua haujlwm?
Cov kev txwv sib txawv los ntawm hom kab: rau cov kab ib txwm, qhov ntev nkag yuav tsum tsis pub tshaj 15mm-qhov no ua rau qhov tsis sib xws ntawm kev tsheb ciav hlau, muaj kev pheej hmoo ntawm kev tsheb ciav hlau buckling. Siab- cov kab ceev tswj kev tswj hwm nruj dua (tsawg=5mm); Tshaj qhov no cuam tshuam lub kaw lub xeev ntawm ballastless txuas ntxiv welded rails, ua rau txawv txav thermal stress. Hloov chaw muaj qhov txwv nruj tshaj plaws (tsawg dua lossis sib npaug li 3 hli); tshaj creep impairs point tshuab conversion raug, ua rau hloov tsis ua hauj lwm.
Yuav ua li cas tswj lub phaj siab eccentricity ntawm -qhov chaw kom tsis txhob muaj qhov tsis xws luag thaum tsim kho?
Cov kev tswj hwm tseem ceeb suav nrog peb kauj ruam: ua ntej, kev tso tawm tus qauv- siv txoj kab nruab nrab ntawm txoj kab nruab nrab ntev thiab cov chaw pw tsaug zog ua ob qhov kev sib tw, kho cov phaj hauj lwm nrog cov qauv tshwj xeeb los xyuas kom meej ua ntej - kev teeb tsa raug. Thib ob, cov cuab yeej-raws li kev teeb tsa- siv lub zog torque wrenches nrog qhov chaw jigs los tiv thaiv cov phaj hloov thaum lub sij hawm bolt nruj. Thib peb, kev tshuaj xyuas tus qauv- tom qab kev teeb tsa, ntsuas qhov kev ncua deb ntawm lub phaj ntug thiab ntug kev tsheb ciav hlau nrog tus kav hlau; ob sab sib txawv yuav tsum tsis txhob ntau tshaj 1 hli. Tag nrho- txheej txheem tswj ntawm "txoj haujlwm- kev teeb tsa- kev tshuaj xyuas" ua haujlwm kom tsis txhob muaj kev teeb tsa eccentricity.
Yuav ua li cas kho cov phaj siab uas twb muaj lawm installation eccentricity kom tshem tawm cov tsheb ciav hlau creep txaus ntshai?
For minor eccentricity (1-2mm deviation), loosen bolts, tap the plate gently with a rubber mallet for fine adjustment using a positioning template, then retighten and re-inspect. For severe eccentricity (>2mm), tshem tawm cov phaj kom huv si, ntxuav cov khib nyiab thiab xeb los ntawm qhov chaw tiv tauj, thiab rov nruab dua raws li cov qauv ntsuas -tsis txhob yuam kev kho. Tom qab kho, saib xyuas kev tsheb ciav hlau nkag hauv ntu rau ib lub lis piam; tsis muaj qhov txawv txav paub meej tias kev tshem tawm phom sij. Tib lub sijhawm, tshuaj xyuas daim hlau los ntawm tib qhov kev tsim kho batch los tiv thaiv batch eccentricity defects.