CALCULATIONS Engineer's Stamp
Project: Spreadsheet Quality Check Item: Example Belt Conveyor Drive Sizing
Project #: Y0000-02 Rev.#: Calculations by: TSP Date: Checked by: Date:
A 01/01/05
BELT CONVEYOR DRIVE SIZING CALCULATIONS CALCULATIONS The reference material for this spreadsheet consists of Cook Engineering'sConveyor Engineering's Conveyor Design Manual , the article "Reclaim Power and Geometry of Bin Interfaces in Belt and Apron Feeders" in the June 1982 issue ofBulk ofBulk Solids Handling and Handling and CEMA's 4th Edition of Belt Conveyors for Bulk Materials from Materials from which all of the lookup values are obtained.
Material Conveyed: Conveying Rate: Material Density: Angle of Repose: Maximum Lump Size: Troughing Idler Info: Diameter Trough Angle Class (A-E) Load Rating # of Plows: # of Belt Cleaners (Scraper Type): L, Length of Conveyor: H, Lift of Conveyor (Negative for Declining): Belt W idth: Surcharge Angle: Load Cross Sectional Area: Belt Capacity: o o # of Tight Side Pulleys (150 to 240 of Wrap): o o # of Slack Side Pulleys (150 to 240 of Wrap): o # of Other Pulleys (Less than 150 of Wrap): Angle of W rap, Drive Pulley: Lb, Length of Skirtboards (1 Side): Ambient Temperature: Belt Speed: Design Minimum Si, Load Idler Spacing: Return Idler Spacing: K1, Lump Adjustment Factor: K2, Environmental & Maintenance Factor:
Photash 2000 92 34 15
tph 3 lb/ft d eg in
6 in 35 deg E 1800 1 1 404 ft 3.5 ft 60 in 25 deg 2 1.424 ft 3 8544 ft /hr/100fpm 2 2 4 240 deg 15 ft
1.13
1 2 3 4 5 6 7 8 9 11 12 13 14 21 22 15 16 17 18 19
o
20
fpm fpm ft ft
23
60 F 500 508.9 3.5 10 1.1
Design Manual Quick Sheet Reference Row #
24 25 26 27
K3, Service Factor: K4, Belt Speed Factor: W b, Belt Unit Weight:
1.2
28
0.92
29
15 lb/ft
30
W m, Material Unit Weight: Max Material Weight Actual Material Weight Idler Load: Adjusted Idler Load: Suitability of Idler Selection: Kt, Temperature Factor:
131.0 133.3 511.0 701.3 Selection is OK 1
lb/ft lb/ft lb lb
31 32 33 34
Ai:
2.8
35
Kx:
0.8993 lb/ft
36
Ky: Tp, Tension From Non-Driving Pulleys: Material velocity component in direction of belt travel as it is fed onto conveyor: Tam, Tension from Acceleration: Cs, Skirtboard Friction Factor: Tsb, Skirtboard Tension:
0.018
37
1100.0 lb 0 fpm 287.6 lb
38
39
0.1086 148.6 lb
40
0 lb
41
Tpl, Plow Tension:
300.0 lb
43
Tbc, Belt Cleaner Tension:
300.0 lb
42
Ttr, Tripper Tension:
Additional Data for Scenario of Loaded Hopper (See Diagram Below) a, Aperture Size: 12 in w, Width of Hopper Outlet: 24 in l, Length of Hopper Outlet: 48 in ReP, Reclaim Power (Break-Away Power): 5.6 hp Tr, Reclaim Tension: 368.0 lb Te, Effective Tension: Shaft Power: Required Motor Power: Motor Size to be Installed: Effective Tension at Start-Up: Required Start-Up Motor Power: f, Coefficient of Friction Between Belt and Pulley: T2, Slack-Side Tension Required to Prevent Slip:
4478.7 67.9 88.7 400
lb hp hp hp
10338.8 204.8 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.
44 45 46
47
a
l
w
