1 symbols used, 7applications – Lenze DSD User Manual
Page 164
7
Applications
7.15
Synchronous drive of squeegees
164
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Moment of inertia
The total moment of inertia consists of the moments of inertia of the individual components:
[7-157] Equation 5: Total moment of inertia
Torque of the application
[7-158] Equation 6: Torque of the application
Tip!
Further equations to complete the calculations required for an application can be found in
the chapter "
".
7.15.1.1
Symbols used
J
sum
J J
aux
J
L
+
+
=
M
App
M
sds
M
μ
J
sum
α
⋅
+
+
=
Symbol
Description
Dimension unit
d
Diameter of roll 1 (drive roll)
mm
F
in
Tension on input side (only positive tensile forces possible)
N
F
out
Tension on output side (only positive tensile forces possible)
N
F
Contact pressure
N
F
W2
Force due to weight of roll 2
N
F
add
Additionally acting force on roll 2
N
m
W2
Mass of roll 2
N
g
Gravitational constant
9.81 m/s
2
s
Safety factor - static friction
%
f
1
Lever arm of the rolling friction - roll 1
f
2
Lever arm of the rolling friction - roll 2
J
Moment of inertia of the lower roll (drive roll)
kgm
2
J
aux
Moment of inertia of the upper roll
kgm
2
J
L
Moment of inertia of the effective mass of the material to be conveyed
kgm
2
J
sum
Total moment of inertia
kgm
2
S
Safety coefficient for the static friction
%
M
App
Required torque of the application
Nm
M
μ
Friction torque
Nm
M
sds
Stationary torque
Nm
v
Speed of the web
m/min
α
Angular acceleration
rad/s
2
β
Vertical mounting position (angle of tilt) of the roll pair W
1
, W
2
, with regard
to the vertical
°
η
Brg
Mechanical efficiency of the roll bearing W
1
, W
2
μ
0
Coefficient of friction of the roll surface