Lenze DSD - Manual (Page 140)

7 Applications
7.11 Roller conveyor
140
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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7.11.1.1 Symbols used
7.11.2 Data for the entry
7.11.2.1 Diameter of the transport rolls
Symbol Description Dimension unit
a Acceleration (translatory) m/s 2
d
aux
Diameter of the transport rolls mm
d
Brg
Bearing diameter mm
f Lever arm of rolling friction mm
F
μ
Friction force N
F
g
Lifting force N
F
add
Additional force (e. g. backing force) N
f Lever arm of rolling friction
g Gravitational acceleration (g = 9.81 m/s 2 ) m/s 2
J
aux
Moment of inertia of transport rollers kgm 2
J
sum
Total moment of inertia kgm 2
l Conveying length m
m
L
Mass of the payload kg
m’
L
Mass of the line load kg/m
m
add
Additional mass (e. g. by deflectors) kg
M
App
Required torque of the application (without losses) Nm
m
sum
Required torque of the application (with losses) Nm
M
sds
Stationary torque Nm
s Path (translatory) m
v Speed (translatory) m/s
α Angular acceleration rad/s 2
β Angle of tilt °
η
sum
Total chain efficiency
η
Chn
Efficiency of one chain
ϕ Angle rad
μ
L
Coefficient of friction of the load/roll
μ
Brg
Coefficient of friction of the bearing
ω Angular velocity rad/s
Symbol Description
d
aux
Outside diameter of feed rolls