BELT FEEDER CALCULATION (AS PER CEMA)

INPUT DATA

SL. NO DESCRIPTION NOTATION UNIT PARTICULARS

1 Capacity Q TPH 990.00

2 Bulk density d 0.80

3 Belt thickness W mm 11.00

4 Belt width b 2.00

5 Feeder length L m 7.00

6 Feeder lift H m 0.00

7 Belt speed v m/s 1.00

8 Idler friction factor 1.50

9 Belt weight Kg/m 17.04

10 Idler spacing m 0.60

11 Skirt friction factor 0.08

12 Skirt length m 4.08

13 Skirt width m 1.35

14 Length of feed chute m 5.00

15 Drive efficiency 0.93

16 Drive margin 1.20

17 f 0.45

18 Angle of contact Deg. 210.00

19 Wrap factor 0.70

20 Maxium allowable sag 0.02

21 No of scraper

a) External scrapper 1.00

b) Internal scrapper 2.00

22 Start factor s 1.5023 No. of non drive pulleysa) Tail pulley 1.00b) Snub pulley 1.0024 No. of drive pulley 1.00

OUTPUT DATASL. NO DESCRIPTION NOTATION UNIT PARTICULARS

1 Weight of material Kg/m 275.00

t/m³

Ai

Wb

Si

Cs

Lsb

B1

Lch

Friction coefficient between transport material & belt

Cw

n1

n2

Wm

2 Idler friction factor Kg/m 1.33

30.0350.015

4 Temperature correction factor 1

CONVEYOR RESISTANCE

5 Idler friction resistance A Kg 9.33

6 B Kg 4.17

7 C Kg 1.79

8 Resistance of material flexture D Kg 67.389 Lift tension E Kg 010 Scrapper resistance Kg 407.1711 Acceleration tension Kg 28.03

12 Height of material on belt feeder inch 10.02

13 Skirt board friction Kg 82.44

14 Kg 3280.50

15 Non drive pulley resistance Kg 113.4016 Drive pulley resistance Kg 90.7217 Total effective belt tension Kg 3994.21

18 Kg 1095.14

19 Slack side tension Kg 1095.14

20 Kg 4193.92

21 Kg 4193.92

22 Tight side tension Kg 8188.1323 Tail tension Kg 4347.51

POWER CALCULATION

24 Power at drive pulley shaft Kw 40.0725 Motor rating Kw 51.7126 Motor selected Kw/Hp 55/75

Kx

Factor for resistance of belt & load to flexture Ky

Kt

Resistance of the belt flexture (conveying)

Resistance of the belt flexture (returning)

Tbc

Tan

hs

Tsb

Resistance to shear off material from chute Tsh

Tpnd

Tpd

Te

Minium required belt tension to maintain 2% sag T0

T2'

Minium required slack side tension to prevent slippage T2"

Selected slack side tension (since T2" > T2')

T2

T1

Tt

Pd

Pm

For carrying sideFor return side

0.37/0.50.55/0.75

7.5/11.1/1.51.5/22.2/33.7/5

5.5/7.57.5/10

9.3/12.511/1515/20

18.5/2522/3030/4037/5045/6055/75

75/100

90/125

110/150132/180160/215200/270250/335