11371757 Installation, operation and maintenance manual – Squirrel cage motor – M line – Vertical
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4.8
MECHANICAL ASPECTS
4.8.1
Base
The base or structure where the motor will be installed
must be sufficiently rigid, flat, free of external vibration
and capable to withstand the mechanical loads to
which it will be submitted;
If the dimensioning of the base is not carefully executed,
this may cause vibration in the base, on the motor and
the driven machine;
The base structural design must be done based on the
dimensional drawing, on the information about
foundation mechanical loads, and on the motor
anchoring method.
ATTENTION
Place shims of different thicknesses between
the motor supporting surfaces and the base
in order to allow a precise alignment.
NOTE
The user is responsible for dimensioning and
building the foundation where the motor will
be installed.
4.8.2
Base loads
The foundation loads are informed in the motor
documentation.
4.8.3
Motor mounting
Mount the motor securely, and align it correctly with the
driven machine, according to the mounting types
described next:
1.
Motor mounted directly on the driven machine: the
two units must be firmly coupled, and the driven
machine must be installed on a proper base;
2.
Motor mounted on a metal base: The base must be
rigid enough and free of vibration.
ATTENTION
Improper mounting can generate excessive
vibration, causing early wear of the bearings
and even breaking the shaft.
4.8.3.1
Motor with solid shaft and flange
In order to mount the motor on the driven machine,
proceed as follows:
1.
Lift the motor by the upper lifting lugs, and rotate it to
position the grease fittings, pipes and terminal boxes
properly;
2.
Clean the flanges to be coupled;
3.
Remove the motor shaft locking device;
4.
Move the motor towards the driven machine, fitting
the motor flange on the machine flange;
5.
Insert the bolts for fixing the flanges and tighten them
with adequate torque;
6.
Couple the motor shaft to the driven machine;
7.
Rotate the shaft of the set to ensure that it rotates
freely:
8.
Align the equipment according to the procedure
described in this manual;
9.
Tighten all the fastening bolts of the flanges, avoiding
their bending or loosening;
10.
Rotate the shaft of the set again.
4.8.3.2
Motor with hollow shaft and flange
First the motor must be fastened to its base and the
driven machine shaft inserted through the motor hollow
shaft.
In some cases, it may be necessary that the motors be
lifted and lowered onto the driven machine shaft.
Those procedures must be done with the necessary
precautions in order to avoid damaging the motor shaft or
the driven machine shaft.
Proceed as follows:
1.
Remove the protection cover of the upper coupling,
and lift the motor with the hoist to install it on the
base;
2.
Lower the motor slowly and carefully, fitting it on the
base;
3.
Position the motor in order to allow access to the
terminal boxes and for the lubrication of the bearings.
Install the fastening bolts and tighten them;
4.
Insert the pump shaft into the motor hollow shaft;
5.
Align the motor shaft with the driven machine shaft,
according to the procedure described in this manual;
6.
Fasten the pump shaft to the coupling and adjust the
fastening nut of the pump shaft;
7.
Rotate the shaft manually to make sure it rotates
freely and that the shafts are perfectly aligned, always
observing the rotation direction of the anti-reversion
ratchet (if any);
8.
After aligning, tighten all the flange bolts evenly;
9.
Rotate the shaft again manually to make sure it
rotates freely.
10.
Reinstall the cover of the upper coupling.
4.8.4
Anchor plate set
The anchor plate set, when used, is composed of the
anchor plate, leveling bolts, leveling shims, alignment bolts
and anchor bolts.
NOTES
When WEG supplies the anchor plate for
fastening and aligning the motor, the
dimensional and installation details of the
anchor plate are supplied in the specific
dimensional drawing of the motor.
The user is responsible for mounting, leveling
and grouting the anchor plates (except when
otherwise specified by commercial
agreement).
