ABB HT580525 Operation Manual page 112

Identifying radial bearings
with a special bearing
geometry
CAUTION
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Disassembly and assembly
Axial clearance A and radial clearance
B
The type of bearing can be determined by measuring the rotor run-out
time. To do so, the rotor must be pushed by hand, once to the left (L) and
once to the right (R), with a force as close to the same in both directions.
The resulting run-out times until the rotor comes to a stop are measured
for the anticlockwise and clockwise rotations and then compared. With
standard radial bearings, the run-out time for anticlockwise and clockwise
rotating rotors is the same.
If one run-out time is at least 1.5 times longer than the other, then radial
bearings with a special bearing geometry are installed. The following B
clearances are valid for these special bearings.
B minimum
B maximum
Clearances out of tolerance
Clearances out of tolerance and excessively worn components can be
the cause of serious damage to machinery and property.
Have components assessed and, if necessary, replaced by an ABB
τ
Turbocharging Service Station.
Operation Manual / TPS44-F.. - TPS61-F..
8
8.4
TPS57
0.46
0.73
Page 110
TPS61
0.52
0.82