Page 409 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair
P. 409
Steam Turbines and Turboexpanerrs 307
CORRECT
BEARINQ
CONTACT
CONTACT INDICATES
VERTICAL ANWUR
MISALIGNMENT
CONTACT INDICATES
HORIZONTAL ANQULAR
MISALIQNMENT
Figure 8-1 1. Journal bearing and rotor shaft contact.
4. Recheck the bearing contact, after the ground spacers have been in-
stalled.
Rotor Locating Bearing
The rotor locating bearing (50, Figure 8-5) maintains the correct axial
position of the rotor assembly to the nozzle ring and steam end bearing
casing. The bearing is mounted on the rotor shaft with the shielded side
of the bearing toward the trip body. A beveled retainer ring (51) holds the
bearing in place on the rotor shaft. The outer bearing race fits into a
groove in the steam end bearing housing (21 and 53), and is prevented
from rotating by an anti-rotation tab which is permanently attached to the
outer race. The anti-rotation tab fits into a slot at the horizontal split of
the bearing housing.
Dlsassem bly
1. With the rotor removed from the turbine casing; disassemble and
remove the trip body as described in Trip Body Removal Section,
later.
