Maintenance/Repair; Wear Of Spring−Applied Brakes - Wittur WSG-S1.2 Manual De Instrucciones

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Maintenance/repair

7 Maintenance/repair
7.1 Wear of spring−applied brakes
INTORQ spring−applied brakes are wear−resistant and designed for long maintenance
intervals. The friction lining and the mechanical brake components are subject to
function−related wear. For safe and trouble−free operation, the brake must be checked and
readjusted at regular intervals, and, if necessary, be replaced.
The following table describes different causes of wear and their effects on the components
of the spring−applied brake. For calculating the service life of rotor and brake and determining
the maintenance intervals to be observed, the relevant factors of influence must be quantified.
The most important factors are the friction work, initial speed of braking and the operating
frequency. If several of the causes of wear indicated for the friction lining occur in an
application at the same time, the influencing factors must be added for calculating the wear.
The INTORQ Select dimensioning program can be used to calculate the maintenance
intervals.
Component Cause
Friction lining Braking during operation
Emergency stops
Overlapping wear during start and
stop of drive
Active braking via the drive motor
with support of brake (quick stop)
Starting wear in case of motor
mounting position with vertical
shaft, even when the brake is not
applied
Armature plate and Rubbing of brake lining
flange
Splining of brake rotor Relative movements and shocks
between brake rotor and brake
shaft
Armature plate support Load alternation and jerks in the
backlash between armature plate,
sleeve bolts and guide bolt
Springs Axial load cycle and shear stress of
springs through radial backlash on
reversal of armature plate
Effect
Wear of friction lining
Armature plate and flangeare run in Friction work
Wear of splining (primarily on the
rotor side)
Breaking of armature plate, sleeve
bolts and guide bolt
Reduced spring force or fatigue
failure
j | BA 14.0197 | 11/2010
Influencing factors
Friction work
Number of start/stop cycles
Number of start/stop cycles
Number of start/stop cycles,
braking torque
Number of switching operations of
brake
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