Belt Speed. Expressed in feet per minute (FPM) S=D x RPM x .2618 x 1.021. Belt Load. At one time when the load is known per square foot: P= G 1 x C(in feet)x W (in feet) At one time when load is known by pounds per hour: P=G 2 /(S x 60) x C(in feet) Horsepower. Level Conveyors: HP=(F x S x (P+M))/33,000 Inclined Conveyors: HP=((P x B)+(P+M)x F .
Model TA, (a slider bed conveyor) 11' long requires 1/2 Hp motor at 65 Feet per minute for a total load of 320 pounds. You desire your conveyor to operate at 90 Feet Per Minute. Calculate as follows: (1/2 X 90) / 65 =.69 You should select the next highest horsepower or 3/4 Hp.
Many times packagers are familiar with their bottling requirements in terms of containers per minute (CPM). When Enercon sizes a cap sealing system for an application we rely on the conveyor speed expressed in feet per minute (FPM). For a quick estimate of fpm simply follow the formula below: (cpm) / (# containers per foot) = fpm
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The product of the two factors is expressed in foot-pounds per minute (ft-lbs/min). Since one horsepower (HP) = 33,000 ft-lbs/min, required conveyor drive power may be expressed in HP as follows, (Te in lbs) x (V in fpm)/ ((33,000 ft-lbs/min)/HP) = HP
V = Belt Speed, feet per minute G = Arc of Contact Correction Factor Arc Correction Factor G = 1.25 1- Where: θ = arc of contact in radians HP V ( ) ( )HP GV ( ) 1 e5123θ ( )HP GV ( )HP GV Belt Speed V = = (PD) (RPM) (.262) Where: V = Belt Speed, feet per minute PD = Pitch Diameter of sheave or pulley RPM = Revolutions Per Minute of the same .