Issue link: http://www.e-digitaleditions.com/i/206043
Engineering Class Chains Conveyor Chain Selection Conveyor Pull Formulas Vertical Conveyor or Elevator Conveyor Chain Pull Formula Horizontal Conveyor ontal P=(W+M)xC+(T1/2)+D* Note: W= Weight of Chains and attachments (lbs/ft) M= Weight of Material (lbs/ft) *Additional pull due to bucket digging material out of the Boot (D) is given by: C = Center Distance (ft) D = WxF W= Weight in lbs/ft of chain,attachments, buckets, etc. Conveyor Chain Pull Formula Ta b l e 6 : B u c k e t D i g g i n g Factor (F) P = ( 2 . 1 W f + M f ) x C + J * Material Sliding on Deck Note: W=Weight in lbs/ft of chain, attachments, flights, etc. Take care to assign the correct friction coefficient with the proper term. The coefficient associated with chain weight "W" is found in Tables 2 or 3 and the coefficient associated with the conveyed material weight "M" is the same as that for the chain if the chain carries the material, or is found in Table 4 if the material slides on a conveyor deck or trough. Incline Conveyor line B Elevator Type F Light Centrifugal Average T1 Take-up Tension 15 25 Light Average 5 8 Continuous yor Conveyor Pull due to Sideboard Traction (J) U H M a t e r ia l A ft) e( C c tan is rD te en =C Conveyor Chain Pull Formula P=[(Mf)cosu+(Wf)cosu+Msinu+Wsinu] +[(Wf)cosu-Wsinu]C+J* N O T E : cosu = B/C sinu = A/C W=Weight in lbs/ft of chain, attachments, flights, etc. Take care to assign the correct friction coefficient with the proper term. The coefficient associated with chain weight "W" is found in Tables 2 or 3 and the coefficient associated with the conveyed material weight "M" is the same as that for the chain if the chain carries the material, or is found in Table 4 if the material slides on a conveyor deck or trough. *See table 7 for "J" term when material slides against sideboards. 26 Duty Additional pull due to material sliding against sideboards (J) is given by: (W) 2) / R J = (CxH N O T E : H = Height of Material C = Center Distance of Conveyor (ft) R = Factor Based on Material Table 7: Factor "R" for Sideboard Friction Table 8: Number of Chain Str ands Factor Material NS Coal 14.0 1 1.0 Coke 35.0 2 1.2 Limestone 7.5 3 1.3 Gravel 7.0 4 1.4 Sand 5.5 5 1.5 Ashes 14.0 6 1.6 F Strands NS