Screw Conveyor Design

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Project: Project #1 Conveyor: Conveyor #1

Date: 12/24/2014

1,250.0 lb/min Reducer efficiency

75,000 lb/hr Diameter (in) 10 37 Gear reduction 13.1

37.50 ton/hr Bearing Type Wood 1.7 Adjusted HP

25.00 ft3/min Loading 15% 30% 45% 95% 177 1,500 ft3/hr Standard 1.00 1.00 1.00 1.00 2,129 50 lb/ft3 Paddles/Flt 0 1 Material Factor 1.5 45% 0.21 10 in 1 Loading 15% 30% 45% 95% 91% Estimate 2.81 2.81 2.81 2.81 25.0 ft 3.84 3.84 3.84 3.84 0.20 ft3/min 0.19 ft3/min 12.27 ft3/hr Rise 0.0 ft 11.23 ft3/hr Conveyor angle 0.0 ° 133.6 RPM Efficiency factor Added HP 0.000 HP 100.0% Required Speed Torque Inclined screws 85% 4.51 Production Rate Flighting Flight Type Conveyor Length Factors Drive Sizing Friction HP Material HP

Screw Conveyor Calculator

Note:

This spreadsheet is based on formulas and values in Catalogue 3000 by Martin Sprocket and Gear Inc. Final Results User Inputs Intermediate Results LEGEND Torque Requirements Density Design Capy. @ 1 RPM Screw Fill level ScrewDiameter Theoretical Capy. @ 1 RPM Total HP Theoretical Capy. @ 1 RPM Conveying Efficiency Design Capy. @ 1 RPM 255591836.xlsx.ms_office 12/24/2014

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: 1 ft*lb in*lb 85% 4.51 Screw Conveyor Calculator

Torque Requirements

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Bearing Type Bearing Factor

Bearing Class Diameter

(in) Factor Ball 1 I

4 12 * Bronze, oil-impregnated 1.7 II 6 18 *Graphite Bronze 1.7 II 9 31 *Hard Iron 4.4 IV 10 37 *Hard-Surfaced 4.4 IV 12 55 *Nylon 2 III 14 78 *Plastic, graphite- impregnated 2 III 16 106 *Teflon 2 III 18 135 Babbit 1.7 II 20 165 Bronze 1.7 II 24 235 Nylon 1.7 II Plastic, laminated fabric-base 1.7 II Wood 1.7 II 4

* Std. paddles at 45° reverse pitch Diameter Factors

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15 30 45 95

Cut and Folded Flight

Not

Recommended 1.5 1.7

Not Recommended

Cut Flight 1.1 1.15 1.2 Not

Recommended

Ribbon Flight 1.05 1.14 1.2 Not

Recommended Standard 1 1 1 1 0 1 1 1.29 2 1.58 3 1.87 4 2.16

* Std. paddles at 45° reverse pitch Conveyors With Paddles

Flight Type

Conveyor Loading

Modified Flight Factors

*Not Recommended

Factor Paddles Per

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a

Corrected HP Calculated HP Calculated HP Corrected HP b

0.219 0.1 0.12 0.01 c 0.5 0.2 0.2 0.46 n 0.79 0.3 0.3 0.79 f 1.05 0.4 0.4 1.04 1.21 0.5 0.5 1.25 1.36 0.6 0.6 1.43 1.52 0.7 0.7 1.59 1.71 0.8 0.8 1.74 1.88 0.9 0.9 1.88 2.01 1 1 2.01 3.1 2 2 3.04 3.84 3 3 3.82 4.5 4 4 4.47 5 5 5 5.04 15% 30% 45% 95% 3.02 3.02 3.02 3.02 3.84 3.84 3.84 3.84

From Nomagraph Modified formula

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0.1764 0.0782 0.1267 0.221655 -0.66912 y = 0.1764x2_{+ 0.0782x + 0.1267} R² = 0.9993 0 1 2 3 4 5 6 0 1 2 3

Calculated HP

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+ 0.0782x + 0.1267 R² = 0.9993 4 5 6

Calculated HP

Calculated HP Poly. (Calculated HP)

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Model Number

Product

Name Conv. Dia.

Trough

Thickness A B C D E

TUF410 Formed _Flange 4 10 5 3 5/8 1 7 1/4 6 1/8

TUF610 Formed _Flange 6 10 7 4 1/2 1 1/4 9 3/4 8

TUF910 Formed _Flange 9 10 10 6 1/8 1 1/2 13 1/4 11 1/8

TUF9316 Formed _Flange 9 3/16 10 6 1/8 1 1/2 13 3/8 11 1/8

TUF10316 Formed _Flange 10 3/16 11 6 3/8 1 1/2 14 3/4 11 7/8

TUF12250 Formed _Flange 12 1/4 13 7 3/4 2 17 1/2 14 1/4

The top flange is formed from the same sheet as the trough, resulting in a lightweight, yet rigid housing section. End Flanges are jig-welded for perfect alignment between sections.

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Formed Flange Trough

E

The top flange is formed from the same sheet as the trough, resulting in a lightweight, yet rigid housing section. End