Conveyors Deparmen of Mining, Dressing and Transpor Machines AGH Be Conveyors Cacuaions Pior Kuinowski, Ph. D. Eng. Pior Kasza, Ph. D. Eng. - pior.kuinowski@agh.edu.p ( 12617 30 92 B-2 ground-foor room 6 consuaions: Mondays 11.00-12.00 DIN 22101 Saionary work(v=cons) P u = W C v P u mgsinδ δ m mg v P mgcosδ P W m gcosδ m g sin δ Fricion Force Graviy Force Be conveyor: μ f m mi P W u C f m g cos δ i m g sinδ i [N] 1
Lengh reaed mass of moving pars Lengh reaed mass of he maeria handed : m Q 3.6 v or Lengh reaed mass of he roaing pars of he iders in a conveyor secion : m mk m Lengh reaed mass of conveyor be : m zkg kg zkd kd B mj 1000 Qj m 3. 6 v [kg/m] [kg/m] S Theoreica voume fow Q j (in m3/h) (v = 1 m/s) 2
Moiona Resisances 1. roing resisances of he iders 2. fexing resisance of he be 3. fexing resisances of he buk maeria 4. acceeraion resisance and friciona resisance beween maeria handed and be 5. chue friciona resisance 6. scraper resisance 7. defecion resisance due o be bending 8. gradien resisance of conveyed maeria W G - Primary Resisances W S - Secondary Resisances W H - Gradien Resisance Fricion vaue f for op and boom run ogeher Noe: Higher safey in he design of he drive unis is achieved wih moor-operaed drive unis by seecing a higher f vaue, wih generaor-induced operaion of he drive unis by seecing a smaer f vaue. 3
Secondary Resisances - Coefficien C(L) The oa secondary resisances FN resu from he sum of ocay imied moiona resisances in he op run and reurn run, paricuary a he head and ai of a be conveyor sysem: C(L) Wsp. długości C Buk maeria feed 2,0 acceeraion resisance and friciona resisance 1,9 beween maeria handed and be 1,8 chue friciona resisance 1,7 Be ceaner 1,6 scraper resisance 1,5 Pueys (no driven) 1,4 defecion resisance due o be bending 1,3 resisance of he puey bearings 80 100 200 300 500 1000 2000 5000 Długość przenośnika L [m] Conveying engh[m] 1,2 1,1 1,05 1,03 1,0 Moiona Resisances W C W G W S W H W D Toa primary resisances : W Toa secondary resisances. W G S f L m 2 m m cos δ g [N] k C 1 W [N] G Toa gradien resisances : W Hm g H [N] W C f L g W C f L d g d m m m cos δ g H m m g [N] kg m m cos δ g Hm g [N] kd 4
Power Required W C - oa of he moiona resisances in op run/reurn run in a seady sae operaion v - be speed N - oa as a resu of oading condiions in a seady operaing sae of necessary power a he periphery of he driving puey W N C v [kw] 1000 N NC or NC N η [kw] η (moor operaed drive) (generaor operaed drive) Rodzaj napędu napęd jednobębnowy η + napęd wieobębnowy η + napęd hamujący η - Eekrobęben 0,96 Eecromechanica 0,94 0,92 Eecromechanica + Hydrodynamic Couping 0,9 0,85 0,95 1,0 Hydrauic 0,86 0,80 Tension cacuaions Wc kp S2 e 1 S S 3 2 Wd S4 S 3 S 1 S4 Wg 4 3 1 2 Tensions correcion (be sag) S max = MAX(S 1 ; S 2 ; S 3 ; S 4 ) [N] S 1 10 kn 5 S 4 5 S 2 S 3 5
Secions pf be conveyor 12 13 14 15 16 1 10 11 R R 9 8 7 6 5 4 3 2 S [kn] 500 400 300 200 100 i+1 0 v i S i+1 S i WGSD mzra WHn P Si 1 Si WGSD(i i 1) WHn(i i 1) WH (i i 1) mzr(i i 1) a P(i i 1) 6
Be Type Coefficien of be spicing r p, Maximum be ension saionary work S max, Safey facor saionary work u, K N u 1 r p S B max [kn/m] Carcass Spicing Coefficienr p B coon P poiamid E poieser S see Cod Vucanisaion 1/z Ho Vucanisaion 0 Cod Vucanisaion 1 py 0,3 Mechanica Spice > 0.4 2 0 3 0,5(n - 2) Carcass Coon, Poiamid, Poieser, See Work condiions Saionary work u good 6,7 average 8,0 poor 9,5 Guide Vaues for Top and Boom Cover Gauges for Texie Carcass and See Cord Conveyor Bes for differen Uses (in mm) 7
Minimum Puey Diameers 8
Bibiography Coninuous handing equipmen Nomencaure, ISO 2148-1974 Kuinowski, wykłady Transpor przenośnikowy, Phoenix Conveyor Bes Design Fundamenas 9