46 l
Installation, operation and maintenance manual – Squirrel cage motor – W Line - Horizontal and vertical 11239449
8
MOTOR DISASSEMBLY AND ASSEMBLY
ATTENTION
All the repair, disassembly and assembly services must be performed only by properly qualified and trained
professionals; otherwise, equipment damage and personal injury may occur. If any further explanations are
necessary, consult WEG.
The disassembly and assembly sequences depend on the motor model.
Always use proper tools and devices. Any damaged part (cracks, dents on machined parts, faulty threads)
must be replaced, avoiding restorations.
8.1
HORIZONTAL MOTORS
Figure 8.1: Horizontal motor
Figure 8.1 legend:
1.
Feet
2.
Stator
3.
Rotor
4.
Internal fan
5.
Shaft
6.
DE bearing
7.
D-end shield
8.
ND-end shield
9.
NDE bearing
10.
Water leak sensor
11.
Grease collecting drawer
12.
Drain to remove condensed water
13.
Water passage hose
14.
Lifting lugs
15.
Frame
16.
Drain to remove the water from the cooling circuit
8.1.1
Disassembly
The following precautions must be taken when
disassembling the electric motor:
1.
Before disassembling the motor, disconnect the pipes
of the cooling water supply;
2.
Disconnect and remove the water passage hoses (13);
3.
Disconnect the motor electrical connections and those
of the accessories;
4.
Remove the grease nipple extenders and the device to
remove the grease from the bearings;
5.
Remove the bearing temperature sensors and the
grounding brush (if any);
6.
In order to prevent damages to the rotor and coil
heads, support the shaft on both drive and non-drive
ends;
7.
Disassemble the DE bearing (6) and the D-end shield
(7);
8.
Disassemble the NDE bearing (9) and the ND-end
shield (8);
9.
In order to disassemble the bearings, follow the
procedures described in the section Bearing
disassembly/assembly of this manual;
10.
Using a proper device, remove the rotor (3) from the
stator (2) by the non-drive end of the motor, taking
care not to drag the rotor against the stator laminated
core or coil heads.
8.1.2
Assembly
The following precautions must be taken when assembling
the motor:
1.
Using a proper device, insert the rotor (3) into the
stator (2) by the non-drive end of the motor, taking
care not to drag the rotor against the stator laminated
core or coil heads.
2.
Assemble the DE bearing (6) and the D-end shield (7),
following the procedure of section 7.10.1.11;
3.
Assemble the NDE bearing (9) and the ND-end shield
(8), following the procedure described in section
7.10.1.11;
4.
Connect the water passage hoses (13);
5.
Install the grease nipple extenders and the device to
remove the grease from the bearings;
6.
Install the bearing temperature sensors and grounding
brush (if any);
7.
Fill the rolling bearings with the proper amount of
grease through the DE and NDE grease nipples.
