7applications – Lenze DSD User Manual
Page 151
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
151
7
Applications
7.13
Belt conveyor for bulk material
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
The filling degree is the ratio of the actual to the theoretically filled surface of the belt:
[7-144] Equation 7: Filling degree
[7-145] Equation 8: Lifting force
The additional force takes the frictional resistance and inertial resistance occurring in different po-
sitions of the belt conveyor into consideration:
[7-146] Equation 9: Additional force
• The additional force (F
add
) results from:
• The inertial and frictional resistance between the material to be conveyed and the belt at the
feeding position
• Frictional resistance between the material to be conveyed and lateral chutes
• Frictional resistance by the belt cleaner
• Flexural resistance of the belt
Torque of the application
[7-147] Equation 10: Torque of the application
Tip!
Further equations to complete the calculations required for an application can be found in
the chapter "
".
ϕ
A
opr
A
abt
-----------
=
F
g
m
L
g
β
sin
⋅ ⋅
=
F
add
C 1
–
(
) F
opr
⋅
=
Shunt-force factor
The coefficients f apply to filling degrees of the belt in the range of ϕ = 0.7 ... 1.1:
l [m]
80
100
150
200
300
400
500
600
700
800
900
1000
1500
> 2000
C
1.92
1.78
1.58
1.45
1.31
1.25
1.20
1.17
1.14
1.12
1.10
1.09
1.06
1.05
M
App
M
sds
J
sum
α
⋅
+
=