8/13/2019 Belt Power Calculation

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BELT DESIGN

Capacity Q2 1000 t/h continuous operation

Lump Size 50 250 mm

Centre distance 500m

Bulk Density ! 1"# t/cu"m

$n%le o& inclination ' ( 150

Belt Width & Belt Speed

B Belt )idth *00mm +,a-le!1.unsorted material. ! Belt Speed 2"5m/sec+,a-le!2.moderate.a-rasie

Capacity Qt+cu"m/h

euired Capacity ! Q2 1000 t/h continuous operation

,heoretical Capacity ! Qt3 ! Q2 / + 4 4 k 1000 /+2"5 4 1"# 4 0"66 ( 2** cu"m/h

)ith Qt3 ( 2** cu"m/h. 7! Basic $n%le ( 150. -y takin% 8!sectioned idler 9 trou%h an%le : ( #50+ma4""

+;rom!ta-le

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0"6* ( *25"@5 cu"m/h

Q ( Qt > ( *25"@5 > 1"# ( 1155"61 t/h A Q2

So. )e reuire to reduce the -elt speed to coney 1000t/h"

1155"61/2"5 ( 1000/ +re

+re ( 2500/1155"61 ( 2"1@ m/sec

ence. -elt =idth B(1000mm 9 takin% 8 sectioned idler =ith 7! Basic $n%le ( 150 9 trou%h an%le:( 200

9 ( 2"1@ m/sec is suita-le to coney 1000t/h in continuous operation"

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Power e!uirement

Power re!uired to dri"e the empt# $on"e#or % N

F/102 ( 81+500 E 100>0"02 > 2"1@F/102 ( ?"*? k=

+G%/mt ( 2- E +ro/s1E +ru/s2 ( 81k%/m !!!!!!!!!!!!!&rom ta-le

-( =ei%ht o& -elt +k%/mtro( =ei%ht o& carryin% idlers +k%

ru( =ei%ht o& return idlers +k%

l ( additional len%th introduced =ith L to include resistance caused -y -endin% o& -elt oer pulleys (100m

s1( distance -et=een carryin% idlers ( 1"5 mtr

s2( distance -et=een carryin% idlers ( 8 mtr

& ( coe&&icient o& &riction o& rollin% parts ( 0"02 +&rom ta-le

Power re!uired to $on"e# the material on the le"el ' N(

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Power re!uired to ele"ate the material ' N)

,his is the most important &actor to increase the po=er"

*ase % ,he material is reuired to eleate the material in the total len%th .then the hei%ht o& eletion is

( L sin ' ( 126mm

,hen the po=er reuired is ( +Q > /8@?

( 851 G=

*ase%( ,he material is -ein% eleated %radually 9 reaches the an%le o& inclination a&ter 250 m"

,hen ( ( L+inclined sin ' ( 250 sin150

( @#"?m

,hen the po=er reuired is ( +Q > /8@? ( 1?@ G=

+dditional power re!uirement ' N,

2"1@ > 12 ( 2"0? G=

Len%th o& skirt -oard @m each side"

L

H

''

'

8/13/2019 Belt Power Calculation

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Theoreti$all# ne$essar# motor $apa$it# ' Nn -.w/

Nn -.w/ ' 1"85 ( 18*6?5