X90 mobile modules
272
X90 mobile system User's manual V 1.20 - Translation of the original manual
PeakHighFrequency
CrestFactorHighFrequency
Vdi3832KtHighFrequency
PeakRaw
CrestFactorRaw
SkewnessRaw
KurtosisRaw
Vdi3832KtRaw
RmsHighFrequency
RmsAccRaw
RmsVelRaw
Iso10816
RmsAccEnvelope
RmsVelEnvelope
FrequencyBandRmsVelEnvelope
FrequencyBandRmsAccEnvelope
FrequencyBandRmsAccRaw
FrequencyBandRmsVelRaw
FrequencyBandNoiseAccEnvelope
FrequencyBandNoiseVelEnvelope
FrequencyBandNoiseAccRaw
FrequencyBandNoiseVelRaw
O
n outer or inner ring
Increased wear
Rolling marks beyond the ring circumference
Classic fatigue
Pitting
Flattening
Overload breakage
Overheating
Roller element impressions
Breakage of the ring
Elastic-plastic deformation
Running marks on the rings
Chatter marks
Dig marks
Smearing
Rough, discolored surfaces
S
Peeling
Potential failures
Characteristic values
Suitability of the respective
characteristic values to monitor
the potential failures:
Very good
Good
Less good
Not assessed
Figure 105: Frequency of failure indicators on roller bearings
For the meaning of individual characteristic values, see
"Characteristic values" on page 170
and
"Configuration"
on page 193
.
Typical cage and roller element damage
Cage damage
Cage frequencies often occur in electric motors, especially where bearings with increased bearing play are used.
If this is not used, oscillation of the cage often occurs. This is then reflected in increased operating noise.
Roller element damage
Damage to rolling elements without damage to the outer or inner ring occurs extremely rarely; the individual features
are therefore only given as examples.
If the roller element is damaged, an impact occurs either on the inner ring, outer ring or both. This makes it possible
to detect damage to rolling elements caused by the rollover frequency or twice the frequency. For this reason, the
harmonic should be included in the characteristic value calculation where possible to detect roller element damage.
For the damage symptoms, see
"Typical outer and inner ring damage" on page 269
.