Nyob rau hauv kev cuam tshuam ntawm ore, cov kabmob hauv cov saw phaj thiab txhawb cov menyuam system ntawmaggregate apron feedersfeem ntau lov, uas ua rau tsis tu ncua ntawm aggregate apron feeders. Nyob rau hauv daim ntawv no, lub finite element tsom xam software yog siv los simulate qhov cuam tshuam saw phaj thiab cov txheej txheem kev txhawb nqa (lub zog qauv tsim los ntawm channel steel thiab I-steel). Nws paub tias qhov kev ntxhov siab ntawm qhov kev txhawb nqa nruj ntawm cov saw hlau yog qhov zoo hauv cov txheej txheem cuam tshuam. Lub deformation ntawm cov saw phaj thiab kev txhawb nqa mechanism ua rau thawj 5-point kev txhawb nqa los ua 2-point kev txhawb nqa ntawm ob qho kawg, uas ua rau muaj kev puas tsuaj ntawm cov saw phaj thiab cov menyuam bearing. Los ntawm kev tshuaj xyuas ntawm cov yam ntxwv cuam tshuam ntawm kev txhawb nqa mechanism ntawm aggregate apron feeders, nws muaj qee yam kev taw qhia hauv kev txhim kho aggregate apron feeders.
aggregate apron feeders yog ib qho hnyav - cov khoom siv dav siv hauv mines kom sib npaug ntawm cov ore mus rau txoj siv conveyor. Hauv kev ua haujlwm tiag tiag, cov kabmob hauv cov saw hlau thiab nws cov kev txhawb nqa rau cov menyuam feem ntau tawg, uas ua rau muaj kev tsis txaus ntseeg ntawm cov khoom sib xyaw apron feeders. Los ntawm qhov ntev - kev soj ntsuam thiab kev tshuaj xyuas, nws pom tau tias muaj ob yam cuam tshuam ncaj qha cuam tshuam qhov tsis ua tiav ntawm cov khoom sib xyaw apron feeders. Ua ntej, yog tias cov saw hlau khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob Thib ob, nyob rau hauv kev ua haujlwm ib txwm muaj, qhov nruab nrab ntawm lub hauv paus phaj ntawm lub phaj phaj thiab lub hauv paus txhawb nqa ntawm idler yuav deform thiab dab dej tom qab lub sijhawm ua haujlwm (kev cuam tshuam), ua rau txoj kev xav tias muaj 5 idlers txhawb nqa cov saw hlau hauv txhua kab, tab sis qhov tseeb, nws yog feem ntau yog sab nraud 2 ua haujlwm, uas ua rau lub neej ua haujlwm luv luv. Qhov tsis ncaj ncees yog qhov tseem ceeb ntawm lub luag haujlwm ntawm cov neeg ua haujlwm. Cov kev paub dhau los thiab lub luag haujlwm yuav nco ntsoov tso qee qhov tuab ntawm ore ntawm qhov chaw ntawm cov saw hlau rau qhov kev sib tsoo tom ntej, uas tuaj yeem ua lub luag haujlwm tsis txaus rau qhov loj, yog li tiv thaiv cov saw hlau. Nyob rau hauv daim ntawv no, qhov cuam tshuam ntawm ore ntawm saw phaj thiab kev txhawb nqa mechanism (I-beam thiab channel steel) yog soj ntsuam thiab kawm, uas muaj qee yam kev taw qhia hauv kev txhim kho aggregate apron feeders.
1. Kev tsom xam ntawm cov saw hlau
1.1 Simplified impact model
Lub apron feeders saw phaj tau txais kev txhawb nqa los ntawm 5 txhawb nqa cov menyuam, thiab kev ntxhov siab ntawm cov saw phaj tom qab qhov kev cuam tshuam yuav cuam tshuam rau qhov kev ntxhov siab ntawm txhua tus menyuam txhawb nqa. Yog li ntawd, qhov kev ntxhov siab ntawm cov saw phaj tom qab kev cuam tshuam ntawm cov ore ntawm cov saw phaj yuav tsum tau soj ntsuam. Cov ore nyob rau hauv tag nrho cov txheej txheem ntawm thauj nyob rau hauv ib qhov siab ntawm 10m dawb lub caij nplooj zeeg, thaum kawg tsaws rau ntawm lub saw phaj. Vim hais tias lub hom phiaj ntawm kev tsom xam yog los soj ntsuam qhov kev ntxhov siab ntawm cov saw hlau nyob rau hauv qhov kev cuam tshuam, cov ore tuaj yeem suav hais tias yog lub cev nruj thiab cov kev txhawb nqa tsis nruj raws li kev txhawb nqa nruj. Tsis tas li ntawd, cov lus tsa suab ntawm lub cev poob dawb nrog qhov siab ntawm 10m yog sib npaug rau qhov kev txav ntawm lub caij nplooj zeeg ntsug nrog qhov pib tshaj tawm ntawm %. Tag nrho cov qauv kev cuam tshuam yog qhia hauv daim duab 1 tom qab simplification. M hauv daim duab 1 yog cov ore. Txhawm rau ua kom qhov kev soj ntsuam ntau tus neeg sawv cev, cov duab ntawm cov ore yog teem raws li ib tug kheej kheej nrog ib txoj kab uas hla ntawm d=350mm. Nws qhov loj thiab qhov hnyav zoo ib yam li cov ore tiag tiag. Tsis tas li ntawd, kev txhawb nqa nruj yog qhov kev txhawb nqa yob, uas yog nyob rau hauv txoj kab kev sib cuag nrog cov saw hlau.
1.2 Impact Simulation and Result analysis ANSYS/LS-DYNA finite element analysis software tau siv los tshuaj xyuas qhov cuam tshuam. Hauv kev kho ua ntej-kev tshuaj ntsuam xyuas, lub ntsiab hom ntawm cov ore thiab cov saw phaj tau txais los ntawm Tet-Solid168, uas yog 10-node thiab 30-degree- ntawm-txoj kev ywj pheej tetrahedral element uas yog cov qauv kev txiav txim siab dua ntawm ore txais lub cev nruj qauv (igid), elastic modulus E1=48GPa=4.8X101Pa, ceev p=2.3 × 103kg / m3, Poisson tus piv =0.2: Cov khoom ntawm cov saw phaj yog siab manganese hlau. Cov khoom siv qauv yog isotropic elastic qauv (Kuv sotropic) nyob rau hauv cov qauv linear elastic. Elastic modulus E2=2.1X101Pa, ceev P2= 7.85 × 103kg/m3, Poisson tus piv roob =0.3. Yuav kom txuag tau sij hawm, tsuas yog cov txheej txheem ntawm ore ntog ntawm 1m mus cuag cov saw phaj yog soj ntsuam. Txij li thaum lub ore yog nyob rau hauv lub caij nplooj zeeg dawb, qhov pib tshaj tawm V0== 13.28m / s (qhov twg h'=9} m) yog siv rau cov ore, thiab y- kev taw qhia acceleration yog lub gravitational acceleration: y- kev taw qhia txwv yog siv rau cov node ntawm cov saw hlau . Nruab nrab ntawm cov ore thiab cov aggregate apron feeders saw phaj yog teb hu (ASTS). Tus qauv finite tsom xam yog qhia hauv daim duab 2. Tom qab ua tiav tam sim no, k cov ntaub ntawv raug tsim thiab daws los ntawm Ls-Dyna Solver ntawm ANSYS/LS DYNA. LS-PREPOST tau txais kev pom zoo rau kev soj ntsuam tom qab ua tiav, uas tuaj yeem tsim qhov kev ntxhov siab nephogram ntawm txhua qhov tso zis theem [). Qhov kev ntxhov siab ntawm cov saw phaj hauv cov txheej txheem cuam tshuam tuaj yeem pom los ntawm kev ntxhov siab nephogram ntawm cov saw phaj. Qhov kev ntxhov siab ntawm cov saw phaj yog tus cwj pwm los ntawm kev ntxhov siab ntau dua ntawm kev txhawb nqa ntawm cov saw hlau, thiab qhov siab tshaj plaws ntawm cov saw phaj yog tsim los ntawm cov saw hlau nyob rau lub sijhawm thaum cov ore ntog tawm ntawm lub phaj thaum muaj kev cuam tshuam. Qhov siab tshaj plaws kev ntxhov siab tshwm sim ntawm chav tsev 6137 ntawm qhov nruab nrab ntawm kev txhawb nqa ntawm cov saw hlau, raws li pom hauv daim duab 3. Y-kev taw qhia kev ntxhov siab nkhaus ntawm chav tsev 6137 yog qhia hauv daim duab hauv qab no.
