32
Installation and maintenance
LSRPM - PLSRPM
Synchronous permanent magnet motors
LEROY-SOMER
4155 en - 2012.05 / e
9.5 - LSRPM 200, LSRPM 225, LSRPM
250, LSRPM 280 SC/SD/MD motors
9.5.1 - Dismantling
- Remove the screws (27) and then take off the cover (13).
- Pull out the fan (7) using a hub remover or 2 levers diametrically
opposite one another, using the shield (6) for support.
- Take out the key (21) and remove the seals (39 and 54 for foot
mounted motors) (54 for flange mounted motors).
- Unscrew the tie rods (14) then remove them.
- Unscrew the inner bearing retainer (33) fixing screws (40)
when using a flange mounted motor or if the drive end bearing
is locked.
- Using a bronze drift, remove the shields (5 and 6) by tapping
gently on the shield bosses. Take out the preloading washer (59).
- If Hall effect sensor already present:
disconnect the Hall
effect sensor (93) (Caution: cable should be pulled out).
- Take care not to remove the rotor from the stator. This is not
necessary when extracting bearings. If absolutely necessary,
screw in a handle, place the motor in a vertical position and
then clamp the stator as described in the procedure in the
appendix.
- Remove the rotor from the stator using a hoist, taking care not
to touch the winding.
- Take out the bearings (30) and (50) using a bearing remover,
while protecting the end of the shaft extension with a washer.
Avoid knocking the running surfaces of the shaft.
9.5.2 - Reassembly
- See section 6.2 before reassembly.
- If necessary, insert the inner bearing retainer (33) at the rotor
drive end, then mount new bearings on the shaft, see section
6.3 on mounting bearings.
- Fill with new grease: the correct amount of new grease for the
bearing is 50% of the free space.
- Fit the circlip (38) if necessary.
- Screw in a shackle, place the motor in a vertical position and
clamp the stator as described in the procedure in the appendix.
- Using a hoist, slowly lower the rotor into the stator, taking care
not to touch the winding.
Warning: the rotor exerts a very strong magnetic force.
- Place the motor in a horizontal position.
- If Hall effect sensor already present:
connect the Hall effect
sensor (pass the cable fully back through).
- Position the preloading washer (59) with a small amount of
grease in the back of the bearing cage of the NDE shield (6),
then remount the NDE shield (6), positioning it on the housing.
- If there is a bearing retainer (33), screw a rod with the same
thread diameter as the screws (40) into one of the tapped holes
on the bearing retainer to maintain its angular position when
remounting the DE shield (5).
When there is a flange, fit a new seal (39) with the spring facing
outwards.
- Remount the shield (5) taking care to allow for the positioning
of a bearing retainer if used.
- Place the tie rods (14) in position and tighten the nuts
diagonally to the recommended torque (see section 6.4).
- If necessary, fix the bearing retainer (33) with the screws (40).
- Mount the shield seals with grease: (54 at the non drive end)
(39 at the drive end for foot mounted motors).
- Mount the fan (7) using a drift to bed it into position.
- Using a key in the handle, check that the rotor turns, then
remove the handle. Check also that there is no axial play if
there is a locked end shield.
- Replace the cover (13) and fix it with the screws (27).
- Replace the key (21).
54
5
50
6
59
39
30
54
39
50
30
38
6
59
33
5
40
39
54
50
38
30
6
59
5
33
40
6
40
39
54
59
33
5
60
50
30
38
39
54
60
50
30
38
40
6
59
33
5
40
62
6
53
33
5
39
60
50
30
38
54
39
60
50
30
38
6
53
33
5
54
62
40
LSRPM 200 L (exc. IM V6)
foot mounted
standard bearings
NDE
DE
LSRPM 200 L (IM V6)
foot mounted
standard bearings
NDE
DE
LSRPM 225
foot mounted
standard bearings
NDE
DE
LSRPM 225
flange mounted (or foot
and flange) standard bearings
NDE
DE
LSRPM 200 - LSRPM 225
foot mounted
drive end roller bearings
NDE
DE
LSRPM 200 - LSRPM 225
flange mounted (or foot and
flange) drive end roller bearings
NDE
DE
NDE
DE
NDE
DE
LSRPM 250 - LSRPM 280
standard bearings
LSRPM 250 - LSRPM 280
drive end roller bearings
LSRPM 200 L
flange mounted (or foot
and flange) standard bearings
NDE
DE
