Nidec 22765-01, Руководство пользователя

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Page 38
NOTE: Ensure the generator field wires
are flat in the wireway so they don’t
tear during pulling. Do not pull on the
edges of the heat sinks or on the exciter
armature windings.
WARNING: Strong magnetic
fields - pull the PMG off straightly. The
assembly may pull toward other steel
components. Be careful that your fingers
or hands do not get pinched. Stay clear if
you have any medially implanted devices,
the strong magnetic fields may cause
medical device failure resulting in death.
Exciter Armature and PMG Removal
See Figure 24.
1. Remove the exciter cover.
2. Remove the retaining bolt and washer.
3. Disconnect the field wires on the rotating rectifier assembly.
4. To remove the PMG rotor, pull it off separately using hand force.
Wrap the PMG rotor in plastic to avoid contamination with metal
filings. Note: Some inboard PMG assemblies use a locknut to
secure the PMG rotor. See Figure 26. To remove the PMG rotor
with a lock nut:
a. On the lockwasher, pry up the tab that is bent down in
a notch of the locknut. Then unscrew the locknut with a
spanner wrench, and remove the lockwasher.
b. Pull the PMG rotor straight back. Take care not to cock the
PMA when pulling it off.
c. Wrap the PMG rotor in plastic to avoid contamination with
metal filings.
5. Slowly pull the armature assembly off of the generator shaft. If
the exciter can not be pulled off by hand, use a hydraulic jack as
shown in Figure 25.
6. Remove the key from the keyway in the generator shaft.
Hole in sleeve for field
wires (some models
may have a slot)
PMG aligning
pin
PMG
Retaining
washer
Retaining
bolts
Rectifier
PMG rotor
aligning
slot
Exciter
armature
sleeve
Exciter
armature
A
A
B
B
Retaining
bolt hole
Field leads
Wire slot
Keyway
Key
Shoulder
A-A end view of
exciter
Key
Keyway
Shoulder
Bolt holes
Wire slot
B-B cutaway view
of shaft
Figure 24 Exciter Armature Assembly