X90 mobile modules
264
X90 mobile system User's manual V 1.20 - Translation of the original manual
Toothed belt
With toothed belts, torque is transferred via the meshing of the teeth. In addition to the already known failure
causes, there are also the failures caused by the toothing.
Failure mode
Frequency in raw
signal spectrum
Frequency in en-
velope spectrum
Comment
Toothed belt damage
1 x fr
1 x fr, 1 x fzn
The tooth meshing frequencies in combination with the respec-
tive speed are clearly visible.
fr
... Belt speed
fzn
... Meshing frequency
Tension of the belt too low
Tension too high
Foreign bodies in the drive
Belt misalignment
Worn pulleys or tensioner pulleys
Tensioning device damaged
Operational oscillations too high
PeakHighFrequency
CrestFactorHighFrequency
Vdi3832KtHighFrequency
PeakRaw
CrestFactorRaw
SkewnessRaw
KurtosisRaw
Vdi3832KtRaw
RmsHighFrequency
RmsAccRaw
RmsVelRaw
Iso10816
RmsAccEnvelope
RmsVelEnvelope
FrequencyBandRmsVelEnvelope
FrequencyBandRmsAccEnvelope
FrequencyBandRmsAccRaw
FrequencyBandRmsVelRaw
FrequencyBandNoiseAccEnvelope
FrequencyBandNoiseVelEnvelope
FrequencyBandNoiseAccRaw
FrequencyBandNoiseVelRaw
Increased wear
Runs noisily
Tearing of the belt
Increased wear on the edges
Rear tears
Increased wear of the fabric
Irregular wear
Hardened edges
Material deposits on the belt Heavy wear of the toothing
Faults in the tooth edges
Failure causes
Potential failures
Characteristic values
Suitability of the respective
characteristic values to monitor
the potential failures:
Very good
Good
Less good
Not assessed
Frequency of the cause of failure in these
Potential failures:
Frequent
Depends on where used
Rare to never
Not assessed
Figure 95: Frequency of failure indicators on toothed belts
For the meaning of individual characteristic values, see
"Characteristic values" on page 170
and
"Configuration"
on page 193
.