Mayr ROBA-stop-M - Performance Data: Friction Work and Switching Times

ROBA-stop
®
-M – Brake Dimensioning
Brake Dimensioning
Friction work
per 0,1 mm
wear
Standard brake
Type 891.
0
_ _._
2
Q
r 0,1
[10
6
J/0,1] 35 40 65 100 130 130 140 150 160 200
Holding brake
Type 891.1_ _._
Q
r 0,1
[10
6
J/0,1] 7 8 13 20 30 65 70 75 80 100
Friction work
on rotor
replacement
Standard brake
Type 891.
0
_ _._
2
Q
r tot.
[10
6
J] 95 100 162 500 600 700 840 950 1000 2000
Holding brake
Type 891.1_ _._
Q
r tot.
[10
6
J] 7 8 13 20 45 130 170 300 350 500
Mass
moment
of inertia
rotor + hub
on d
max
Type 891.
0
_ _._
1
(Metal rotor)
J
[10
-4
kgm²] 0,12 0,21 0,67 1,74 4,48 6,74 16,54 31,68 61,82 222,6
Type 891.2_ _._
(Friction lining rotor)
J
[10
-4
kgm²] 0,1 0,17 0,58 1,53 4,1 - - - - -
Weight
Standard brake
Type 891.
0
_ _._
2
m
[kg] 0,76 1,1 1,8 3,4 4,5 7,4 13,6 19,2 33,3 38
Holding brake
Type 891.1_ _._
m
[kg] 0,76 1,1 1,8 3,4 4,5 7,4 13,6 19,2 33,3 38
Please Observe!
Due to operating parameters such as slipping speed, pressing or temperature, the wear values can only be considered guideline values.
When using a brake with a friction disk (Type 891._ _2._), the max. friction work and friction power must be reduced by 30 % for sizes 2 to
16 and by 50 % for sizes 32 – 60.
The wear values Q
r 0,1
and Q
r tot.
are therefore not valid.
1. Brake selection Key:
M
req.
=
9550 x P
x K ≤ M
2
[Nm]
J [kgm²]
Mass moment of inertia
n
K [-] Safety factor
(1 – 3 x acc. to conditions)
t
v
=
J x n
[sec]
9,55 x M
v
M
req.
[Nm]
Required braking torque
t
4
= t
v
+ t
1
[sec]
M
v
[Nm]
Delaying torque
M
v
= M
2
+ (-)* M
L
[Nm]
M
L
[Nm] Load torque * sign in brackets is valid if load
is braked during downward movement
2.
Inspection of thermic load
M
2
[Nm]
Nominal torque (Technical Data page 4)
Q
r
=
J x n²
x
M
2
[J/braking]
n [rpm]
Speed
182,4 M
v
P [kW]
Input power
t
v
[s]
Braking action
The permitted friction work (switching work) Q
r perm.
per braking for
the specified switching frequency can be taken from the friction-
power diagrams (page 9).
If the friction work (switching work) per braking is known, the max.
switching frequency can also be taken from the friction-power
diagrams (page 9).
t
1
[s]
Connection time (Table 6 page 10)
t
4
[s]
Total switch-on time
Q
r
[J/braking] Friction work present per braking
Q
r 0,1
[J/0,1] Friction work per 0,1 wear (Table 4)
Q
r tot.
[J] Friction work up to rotor replacement (Table 4)
Brake Size Selection
Mass Moment of Inertia
Size
Rotor + hub at d
max
2 4 8 16 32 60 100 150 250 500 1000
Type 891.
0
1
_ _._
(Metal rotor)
J
R+H
[10
-4
kgm²] 0,12 0,21 0,67 1,74 4,48 6,74 16,54 31,68 61,82 222,6 424
Type 891.2_ _._
(Friction lining rotor)
J
R+H
[10
-4
kgm²] 0,1 0,17 0,58 1,53 4,1 - - - - - -
Table 5
Friction Work
Size
2 4 8 16 32 60 100 150 250 500 1000
Per 0,1 mm
wear
Standard brake
Type 891.
0
2
_ _._
Q
r 0,1
[10
6
J/0,1] 35 40 65 100 130 130 140 150 160 170 180
Holding brake
Type 891.1_ _._
Q
r 0,1
[10
6
J/0,1] 7 8 13 20 30 65 70 75 80 85 90
Up to rotor
replacement
Standard brake
Type 891.
0
2
_ _._
Q
r tot.
[10
6
J] 95 100 162 500 600 700 840 950 1000 1700 2000
Holding brake
Type 891.1_ _._
Q
r tot.
[10
6
J] 7 8 13 20 45 130 170 300 350 425 540
Table 4
88