11239449 Installation, operation and maintenance manual – Squirrel cage motor – W Line - Horizontal and vertical l 47
8.2
VERTICAL MOTORS
Figure 8.2: Vertical motor
Figure 8.2 legend:
1.
Flange
2.
Stator
3.
Rotor
4.
Internal fan
5.
Shaft
6.
Lower bearing
7.
Lower end shield
8.
Upper end shield
9.
Upper bearing
10.
Water leak sensor / drain
11.
Grease relief
12.
Shaft protection cover
13.
Fastening nut of the upper rolling bearing
8.2.1
Disassembly
The following precautions must be taken when
disassembling the electric motor:
1.
Before disassembling the motor, disconnect the
cooling water supply pipes and place the motor in the
horizontal position;
2.
Disconnect and remove the water passage hoses;
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 lower bearing (6) and the lower end
shield (7);
8.
Remove the shaft protection cover (12) and the
fastening nut of the upper rolling bearing (13);
9.
Disassemble the upper bearing (9) and the upper end
shield (8);
10.
In order to disassemble the bearings, follow the
procedures described in the section
Bearing
disassembly/assembly
of this manual;
11.
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.
8.2.2
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 this manual;
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 the
grounding brush (if any);
7.
Fill the rolling bearings with the appropriate amount of
grease through the DE and NDE grease nipples
