ABB TPS48-F Series Operation Manual page 99

Operation Manual / TPS44-F.. - TPS61-F..
8 Disassembly and assembly / 8.4 Axial clearance A and radial clear-
ance B
Identifying radial bearings
with a special bearing
geometry
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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 direc-
tions. The resulting run-out times until the rotor comes to a stop are
measured for the anticlockwise and clockwise rotations and then com-
pared. 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
CAUTION
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
u
Turbocharging Service Station.
HZTL2412_EN
TPS57
0.46
0.73
Rev.G
TPS61
0.52
0.82
March 2020