Nidec 22765-01, Руководство пользователя

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Page 42
7. If the generator has a PMG, place it onto the end of the exciter
sleeve. Make sure it is aligned with the pin slot in the end of the
exciter sleeve.
8. Install the retaining washer and bolt, and torque (60 ft-lbs
(81 Nm) for a 1/2" (12.7 mm) diameter bolt; 200 ft-lbs (271 Nm)
for a 3/4" (19.05 mm) diameter bolt).
9. Install the exciter frame/stator and/or exciter-PMG frame/stator.
Install the clips securing the exciter field leads to the exciter
frame and endbracket and connect the leads.
10. Measure the air gap between the exciter armature and exciter
field and between the PMG rotor and PMG stator. If the air gap
of the armature is less than specified in Table 4 or if the air gap
of the PMG is less than 0.020" (0.5 mm), check:
a.
generator-engine alignment
b. bearing wear
c. misalignment of the armature, PMG or stator
11. Install the exciter cover.
Exciter Armature Diameter Minimum Air Gap
Inches MM Inches MM
5 3/4 146 0.014 0.356 mm
9 7/8 250.8 0.014 0.356 mm
12 1/2 317.5 0.018 0.457 mm
16 1/4 412.75 0.035 0.889 mm
IMPORTANT: To measure air gap,
measure completely around the gap
between the exciter armature and exciter
field with a feeler gauge. Keep the
gauge at the tightest point, and turn the
generator over to measure the air gap as
the rotor turns.
WARNING: Do not pry on the
generator fan blades. Blades can weaken
which could result in serious injury or
death from flying debris.
Table 4 Exciter Air Gap