2021.04 / l
Electric Power Generation
19
Installation and maintenance
TAL 047
Low Voltage Alternator - 4 pole
5378 en -
Rotor
NDE shield
Dowel
Nut
Threaded rod
4 78 36
- Fit the thrust bearing screws (78), remove
the threaded rod, fit the other screw and
tighten up the assembly.
- Tighten the shield (36) screws.
- Reconnect exciter wires E+, E-.
- Finish reassembling the cover.
When dismantling the shields, you will
need to change the antifriction bearings,
the “O” ring seal, the preloading (wavy)
washer and adhesive paste.
• Dismantling the rotor assembly
- Remove the NDE shield (36).
- Remove the DE shield (30).
- Support the DE rotor (4) with a strap or with
a support constructed in accordance with
the following drawing.
- Move the strap as the rotor moves in order
to distribute the weight over it.
- After extracting the rotor, be careful not to
damage the fan and place the revolving field
on special V-blocks.
When dismantling the rotor involves
changing parts or rewinding, the rotor
must be rebalanced.
• Reassembling the machine
- Mount the rotor (4) in the stator (1) (see
drawing above) taking care not to knock the
windings.
- Mount the new preloading (wavy) washer
(79) + the new “O” ring seal (349) in the
shield (36).
- Screw a threaded rod into the thrust
bearing (78).
- Refit the shield (36) on the machine using
a dowel and nut in the shaft extension (see
diagram).
- Slide the threaded rod into the shield hole
to make it easier to assemble (see diagram).
- Fit the thrust bearing screws (78), remove
the threaded rod, fit the other screw and
tighten up the assembly.
- Tighten the shield (36) screws.
- Reconnect exciter wires E+, E-.
- Finish reassembling the cover.
- Refit the flange (30) on the stator (1).
- Tighten the screws (30).
- Mount the new preloading (wavy) washer
(79) + the new “O” ring seal (349) in the
shield (36).
- Refit the shield (36) on the machine using
a dowel and nut in the shaft extension (see
diagram).
- Tighten the shield (36) screws.
- Reconnect exciter wires E+, E-.
- Finish reassembling the cover.
WARNING
WARNING