ADASH Ltd.
Adash 4900 – Vibrio III
34
frequency (see the value description in the bottom) the probably the mechanical looseness is the
machine problem.
The most common causes of this defect are:
- soft flanges,
- loose anchoring bolts,
- cracks in frames – cracked welds,
- free play in rotational part seating,
- or possibly other problems not related to mechanical looseness,
- bent shaft.
See also FASIT chapters.
Time signal for bearing condition evaluation
The time signal of bearing vibrations is displayed.
g
ENV
value is under the time signal (envelope
modulated signal - see Methods for ball bearing condition diagnostics chapter. Caution – the time
signal is displayed as a direct record, not after envelope modulation. Look at three basic screens for
easy work with this function.
Undamaged bearing:
This bearing generates a low amplitude noise only, whose time record shape is steady.
It’s necessary to have a look on the range of the graph (left side). Signal could look high but it’s not
when the graph range is low (for instance 0,5 g).
