Project: Spreadsheet Quality Check Project #: Y0000-02 Rev.#:Item: Example Belt Conveyor Drive Sizing Calculations by: TSP Date:

Checked by: Date:

BELT CONVEYOR DRIVE SIZING CALCULATIONS

Material Conveyed: PhotashConveying Rate: 2000 tph

Material Density: 92Angle of Repose: 34 degMaximum Lump Size: 15 inTroughing Idler Info:

Diameter 6 inTrough Angle 35 degClass (A-E) ELoad Rating 1800

# of Plows: 1# of Belt Cleaners (Scraper Type): 1L, Length of Conveyor: 404 ftH, Lift of Conveyor (Negative for Declining): 3.5 ftBelt Width: 60 inSurcharge Angle: 25 deg

Load Cross Sectional Area: 1.424

Belt Capacity: 8544

2

2

4Angle of Wrap, Drive Pulley: 240 deg

15 ft

Ambient Temperature: 60Belt Speed:

Design 500 fpmMinimum 508.9 fpm

3.5 ftReturn Idler Spacing: 10 ft

1.1

lb/ft3

ft2

ft3/hr/100fpm

# of Tight Side Pulleys (150o to 240o of Wrap):

# of Slack Side Pulleys (150o to 240o of Wrap):

# of Other Pulleys (Less than 150o of Wrap):

Lb, Length of Skirtboards (1 Side):oF

Si, Load Idler Spacing:

K1, Lump Adjustment Factor:

CALCULATIONSSUMMARY SHEET Engineer's Stamp

The reference material for this spreadsheet consists of Cook Engineering's Conveyor Design Manual, the article "Reclaim Power and Geometry of Bin Interfaces in Belt and Apron Feeders" in the June 1982 issue of Bulk Solids Handling and CEMA's 4th Edition of Belt Conveyors for Bulk Materials from which all of the lookup values are obtained.

Design ManualQuick Sheet

Reference Row #

1.13

1.2

0.92

15 lb/ft

Max Material Weight 131.0 lb/ftActual Material Weight 133.3 lb/ft

Idler Load: 511.0 lbAdjusted Idler Load: 701.3 lbSuitability of Idler Selection: Selection is OK

1

2.8

0.8993 lb/ft

0.018

1100.0 lbMaterial velocity component in direction ofbelt travel as it is fed onto conveyor: 0 fpm

287.6 lb

0.1086

148.6 lb

0 lb

300.0 lb

300.0 lb

Additional Data for Scenario of Loaded Hopper (See Diagram Below)a, Aperture Size: 12 inw, Width of Hopper Outlet: 24 inl, Length of Hopper Outlet: 48 inReP, Reclaim Power (Break-Away Power): 5.6 hp

368.0 lb

4478.7 lbShaft Power: 67.9 hpRequired Motor Power: 88.7 hpMotor Size to be Installed: 400 hp

Effective Tension at Start-Up: 10338.8Required Start-Up Motor Power: 204.8

f, Coefficient of Friction Between Belt and Pulley: 0.35

1344.1 lb

Notes and Comments:Factors, Tensions, and Power calculated based on full theoretical max belt load cross section rather than actual belt tension

this will cause very conservative horsepower calculations for long conveyors.

K2, Environmental & Maintenance Factor:

K3, Service Factor:

K4, Belt Speed Factor:

Wb, Belt Unit Weight:

Wm, Material Unit Weight:

Kt, Temperature Factor:

Ai:

Kx:

Ky:

Tp, Tension From Non-Driving Pulleys:

Tam, Tension from Acceleration:

Cs, Skirtboard Friction Factor:

Tsb, Skirtboard Tension:

Ttr, Tripper Tension:

Tpl, Plow Tension:

Tbc, Belt Cleaner Tension:

Tr, Reclaim Tension:

Te, Effective Tension:

T2, Slack-Side Tension Required to Prevent Slip:

a

l

w

a

l

w

A01/01/05

12

345

67

89

1112131421

22

15

16

17

18

19

20

23

2425

26

Engineer's Stamp

Design ManualQuick Sheet

Reference Row #

27

28

29

30

31

3233

34

35

36

37

38

39

40

41

43

42

444546

47