Inspection Of The Motor; Servicing The Brake; Wear Of The Spring-Operated Brake - Siemens SINAMICS G115D Operating Instructions Manual

11.2.19

Inspection of the motor

Check the motor in accordance with the criteria set out in General motor information
(Page 372).
Touch up damaged paintwork carefully.
11.2.20

Servicing the brake

11.2.20.1

Wear of the spring-operated brake

The friction lining and the mechanical components of the brake are subject to wear due to
their inherent function. For safe and fault-free operation, the brake must be regularly
checked and adjusted, and if necessary, replaced.
The following table describes the different causes of wear and their effects on the spring-
operated brake components. The important influencing factors have to be quantified in order
to calculate the service life of the rotor and the brake and determine the stipulated
maintenance intervals. Here, the most important factors are the work as a result of the
frictional force, the speed at the start of braking and the switching frequency. If several of the
listed causes of wear to the friction lining occur at the same time in a single application, the
influencing factors should be added together for the wear calculation.
Table 11- 21 Causes of wear to the spring-operated brake
Component
Friction lining
Armature disk and
flange
Braking rotor gear
teeth
Support of the
armature disk
Springs
SINAMICS G115D distributed drive
Operating Instructions, 09/2020, FW V4.7 SP13, A5E48681219B
Additional information on the SIMOGEAR geared motor
Cause
Operational braking
Emergency stops
Wear caused by overlap
when starting and stopping
the geared motor
Active braking by the motor
supported by the brake
(quick stop)
Low speed and mounting
position 'motor at top'
Wear when starting for
motor a mounting position
with vertical shaft, even
when the brake is released
Friction of the brake lining
Relative movement and
impacts between rotor and
hub
Load change and impacts in
the backlash between the
armature disk, sleeve
screws and guide pins
Axial load cycle and shear
stresses in the springs due
to radial backlash in the
armature disk
11.2 Specific data motor
Effect
Friction lining wear
Run-in of armature disk
and flange
Wear of the teeth (pri-
marily on the rotor side)
Deflection of armature
disk, sleeve screws and
pins
Decrease in the spring
force or fatigue failure
Influencing factor
Work as a result of the
frictional force
Number of start / stop
cycles
Work as a result of the
frictional force
Number of start / stop
cycles
Number of start / stop
cycles, strength of brak-
ing torque
Number of switching
operations of the brake
393