SPX Cooling Technologies 07-1126 User Manual
15
Maintenance
9––Worn output shaft bearing: this condition generates vibration on
the tip path plane at a frequency equal to the rotor RPM.
10––The fan and/of the structure bolts are not tightened: in this case
all the bolts have to be tightened.
11––The draining holes of the blades are obstructed: they have to
be opened.
the tip path plane at a frequency equal to the rotor RPM.
10––The fan and/of the structure bolts are not tightened: in this case
all the bolts have to be tightened.
11––The draining holes of the blades are obstructed: they have to
be opened.
The amplitude of the fan vibrations is determined by the rigidity
of its support. Vibration that would not be critical to a fan sup-
ported by a sufficiently rigid structure is amplified by an overly
flexible support. This support rigidity may also cause unexpected
variations in the resonant frequencies of the blades.
of its support. Vibration that would not be critical to a fan sup-
ported by a sufficiently rigid structure is amplified by an overly
flexible support. This support rigidity may also cause unexpected
variations in the resonant frequencies of the blades.
Note