STANDARD PRODUCT CATALOGUE
handling systems
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PACIFIC
CONVEYORS LTD. STANDARD PRODUCT CATALOGUE |
engineered material handling systems |
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Technical Page 5 HORSEPOWER CALCULATIONS | |||||||||||||||||||||||
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FOR BELT DRIVEN LIVE ROLLER CONVEYORS | |||||||||||||||||||||||
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Formula | ||||||||||||||||||||||
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PRODUCT WEIGHT (1) (lbs) | Total weight of product on conveyor | ||||||||||||||||||||||
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+ BELT WEIGHT (lbs) | weights and tables | ||||||||||||||||||||||
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+ ROLL WEIGHT (lbs) | weights and tables | ||||||||||||||||||||||
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+ DRIVE WEIGHT (lbs) | Best estimate (for small drives, use 250 lbs) | ||||||||||||||||||||||
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= SUBTOTAL (1) (lbs) | |||||||||||||||||||||||
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x FRICTION FACTOR (1) | Belt driven live roller 0.10 weights and tables | ||||||||||||||||||||||
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Model 138LR light duty | = SUBTOTAL (1) (lbs) | BELT PULL DUE TO PRODUCT IN MOTION | |||||||||||||||||||||
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Model 196LR medium duty | PRODUCT WEIGHT (2) (lbs) | Portion of weight of product to be accumulated | |||||||||||||||||||||
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Model 196ZPA accumulator | x FRICTION FACTOR (2) | Equivalent to belt on steel slider tread (0.3) | |||||||||||||||||||||
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Model 251CALR heavy duty | = SUBTOTAL (2) (lbs) | BELT PULL DUE TO ACCUMULATED PRODUCT | |||||||||||||||||||||
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Model 251ZPA accumulator | + SUBTOTAL (1) (lbs) | Calculated in previous lines | |||||||||||||||||||||
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= TOTAL BELT PULL (lbs) | TOTAL REQUIRED BELT PULL | |||||||||||||||||||||
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x BELT SPEED (fpm) | |||||||||||||||||||||||
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= WORK RATE (ft lbs/min) | NOMINAL WORK RATE | ||||||||||||||||||||||
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x 1.25 contingency | Contingency allowance for drive inefficiencies | ||||||||||||||||||||||
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x 1.25 contingency | Contingency allowance for occasional overloads | ||||||||||||||||||||||
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divide by 33,000 | (one horsepower = 33,000 ft lbs per minute | ||||||||||||||||||||||
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= HORSE POWER | ENERGY REQUIREMENT 1HP = 0.75 kw | ||||||||||||||||||||||
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Model 196LRC curve | * treat deflected loads, or product in contact with guides as accumulated | ||||||||||||||||||||||
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Model 196LRCS curve/spur | * Zero pressure accumulators require no calculation for accumulated loads | ||||||||||||||||||||||
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Do not accumulate on belt driven curves | * Assume that only half the product on an accumulator is in motion. | ||||||||||||||||||||||
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* Treat all slave driven curves and spurs as one 10'0" section | |||||||||||||||||||||||
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