Lsrpm 280 Mk1, Lsrpm 315 Motors - Leroy-Somer LSRPM Series Installation And Maintenance Manual

LEROY-SOMER
9.6 - LSRPM 280 MK1, LSRPM 315
motors
9.6.1 - Dismantling
- Remove the screws (27), the grease nipple (42) and its exten-
sion, then take off the cover (13).
- Pull out the fan (7) using a hub remover or 2 levers diametri-
cally opposite one another, using the shield (6) for support. For
an aluminium fan, heat the hub to approximately 100°C before
removing it.
- Take out the key (21).
- Unscrew the tie rods (14) then remove them.
- Unscrew the DE inner bearing retainer (33) fixing screws (40)
and the fixing screws (62) on the NDE bearing retainers (32)
and (52), and remove the bearing retainers.
- Unscrew the «Hc» screws on the mobile valves (35 and 56)
then unscrew the valves using a hook spanner or a conical
bronze drift. Unscrew the valves by hand and remove them.
The valves hold the seals (39 and 54) in place.
- Remove the fixed valves (34 and 35) from the bearing housings.
- Using a bronze drift, remove the shields (5 and 6) by tapping
gently on the shield bosses.
- Check that the diameter of the bearing retainer (53) is smaller
than that of the stator, otherwise remove the bearing (50) in
accordance with the following instructions.
- Disconnect the Hall effect sensor.
- Take care not to remove the rotor from the stator. If absolutely
necessary, place the motor in a vertical position then screw a
handle into the shaft extension hole.
Warning: metal environment.
- Clamp the stator to overcome the magnetic force and 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.
- The bearings are removed either separately or with the
bearing retainers (33 and 53). To avoid damaging the bearing
retainers, heat the outer bearing ring (the bearing should be
discarded).
- Recover the preloading washer or springs (59) from the
bearing retainer (53).
9.6.2 - Reassembly
- See section 6.2 before reassembly.
- Insert the rotor drive end inner bearing retainer (33) and the
non drive end inner bearing retainer (53), not forgetting to
insert the preloading springs (59).
- Fill with new grease: the correct amount of new grease for the
bearing is 50% of the free space.
- Mount the new bearings (30 and 50) on the shaft, see section
6.3 on mounting bearings.
- Place the stator in a vertical position. 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.
- Connect the Hall effect sensor.
- Screw a rod with the same thread diameter as the screws (40)
and (62) into one of the tapped holes on the bearing retainers
(33) and (53) to maintain the position of the grease nipple when
refitting the shields (5 and 6).
34
Installation and maintenance
LSRPM - PLSRPM
Synchronous permanent magnet motors
- Check that the preloading springs are properly installed.
- Fit the NDE shield (6), positioning it on the stator, then mount
the fixed valve (55) in the shield bearing housing.
- Mount the mobile valve (56) by either screwing it or locking it,
having carefully installed the seal (54) on the valve.
- Mount the outer bearing retainer (52) with the bearing retainer
locking screws (62), making sure that the grease drain hole is
at the bottom.
- Mount the shield (5) at the drive end, positioning it on the
stator, then mount the fixed valve (34) in the shield bearing
housing.
- Mount the mobile valve (35) by either screwing it or locking it,
having carefully installed the seal (39) on the valve.
- Mount the outer bearing retainer (32) with the bearing retainer
locking screws (40), making sure that the grease drain hole is
facing the right way.
- Place the tie rods (14) in position, not forgetting the feet of the
cover (380), tighten the nuts diagonally without locking them
so that the feet of the cover can be positioned when it is
mounted.
- Mount the fan (7) using a drift to bed it in position, or, for an
aluminium fan, by heating the hub to approximately 100°C.
- Check that the motor turns freely by hand and that there is no
axial play.
- Replace the cover (13) and fix it with the screws (27), replace
the grease nipple (42) and its extension.
- Tighten the rod nuts (14), always diagonally, to the torque
recommended in section 6.4.
- Replace the key (21).
LSRPM 280 MK1 - LSRPM 315
LSRPM 280 MK1 - LSRPM 315 standard bearings
standard bearings
6 59
52
6 59
52
62
62
55
55
56 50
54
56 54 50
NDE
NDE
LSRPM 280 MK1 - LSRPM 315
LSRPM 280 MK1 - LSRPM 315 drive end roller bearings
drive end roller bearings
52 55
6
52 55 6
62
62
56 54 50
56 54
50
NDE
NDE
4155 en - 2012.05 / e
33
53 5 32
33
53 5 32
40
40
34 39
30 35
34
30 35 39
DE
DE
53 33 5 32
53 33 5 32
40
40
30 34 35 39
30 34 35 39
DE
DE