12638144 Installation, operation and maintenance manual – Synchronous Alternator – AG10 line - Horizontal l 35
Table 4.10: Standard "G" dimensions
ØPA (mm)
Coupling Disc
(SAE)
G (mm)
241,3
7,5
30,2
263,4
8
61,9
314,2
10
53,9
352,3
11,5
39,6
466,6
14
25,4
517,5
16
15,7
571,4
18
15,7
673,1
21
0,0
733,4
24
0,0
ØPA dimension has tolerance of -0.13 mm
ØPA = Coupling disc diameter
4.9.3.2.2
Change of G dimension
If it is necessary to change the "G" dimension, the
position of the coupling discs (E) should be amended.
To do this, simply remove or add the
spacer rings ( I )
,
as shown in Figure 4.14.
A)
Flange
B)
Shaft end
C)
Key
D)
Coupling bushing
E)
Coupling discs
F)
Hexagon bolt
G)
Spring washer
H)
Stop ring
I)
Spacer rings
Figure 4.14: Procedure to change the G dimension
NOTE
To meet the necessary combination of disc and
flange, the flange (A) can also be changed.
The fixation of the coupling discs must be performed
according to tightening torques shown in Table 4.11.
Table 4.11: Tightening torques to fix for coupling discs
Frame
size
Fixing screw
Partial Thread /
Blackened
Resistance
class
Tightening
torque (*)
250
12xM16x2,0
12.9
300 Nm
280
12xM16x2,0
12.9
300 Nm
315
16xM16x2,0
12.9
300 Nm
355
12xM20x2,5
10.9
566 Nm
400
12xM20x2,5
10.9
566 Nm
* Tightening torques defined according to VDI-2230 Standard.
For larger frames, refer to WEG.
Fix the screws with high torque chemical glue.
NOTES
The values of the tighten torques shown in
Table 4.11 are nominal for final tightening
with a torque wrench.
To pre-tightening (screw gun or impact
wrench) must be used maximum 70% of the
nominal value.
During the maintenance or replacement of
the coupling discs, the screws must be
replaced with new ones, according to Table
4.11.
Shall not be used full thread screws for this
application.
NOTE
The user is responsible for installing the
alternator.
WEG is not responsible for damage to the
alternator, associated equipment and
installation, which occurred due to:
Excessive vibrations transmitted;
Poor facilities;
Failures in alignment;
Inappropriate storage conditions;
Failure in following instructions before start-
up;
Incorrect electrical installation.
G dimension
