NCF
EN
12
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Voltage differences due to installation
Since it is impossible to establish all-inclusive criteria that can take into account all the
possible combinations of these effects, it is advisable to implement a plan of periodical
checks according to the effective deterioration noted, so that any variations in structural
characteristics can be detected in subsequent checks.
2.4
Vibration risks
CAUTION!
Risk of equipment damage.
•
Failure to check vibration levels may generate high risk factors and compromise the
operative lifespan of the fan.
•
Fan operation within a very broad range of operating speeds may lead to increased
vibration in correspondence with a specific resonance frequency of the system of which
the fan is only a single component.
•
Avoid working at speeds coinciding with structural resonance frequencies, and if this
is not possible, modify some variable that can change the resonance frequency of the
system, for example by using vibration dampers of a different type.
Vibrations are the main factor affecting the operational life and safety of fans, and for this
reason it is essential to accurately monitor their level during fan operation and work cycles.
If ignored, vibrations can:
•
Cause the formation of cracks serious enough to cause structural failure, which may
even be sudden.
•
Cause difficult operating conditions for bearings, with malfunctions that may even
include seizing (with dangerous overheating effects).
•
Cause slackening of tightening and fixing components (nuts and bolts).
•
Generate greater noise.
NOTE!
The monitoring of vibrations and temperatures makes it easier to take preventive
actions against accidents.
