Nidec LEROY-SOMER FLSES 100 L, Руководство по пусконаладке и техническому обслуживанию

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Maintenance and service guide - LSPX-FLSPX ZONE 21 - Ex tb – LSES-FLSES ZONE 22 - Ex tc
5725 en - 2020.02 / c
INSTALLATION AND MAINTENANCE - FLSPX
12.5 - Moteurs FLSPX 315 to 355 LD
NOTE:
- There is a front mixer on the 315 M to 355.
- The types 315 M and L, and all the 355, have rear held
bearings: the pre load washer (59) is therefore at the front.
- The type 315 S has a front held bearing, therefore the pre load
washer (59) is at the rear.
Take account of this in removal/refitting operations.
12.5.1 - Removing the rear bearing housing
- Withdraw the grease nipple extension (65);
- remove the cover (13) once the fixing screws (27) have been
removed;
- remove the shaft extension screws and washer (10) and (11);
- extract the fan (7);
- extract the key from the fan (not shown);
- slide the seals support (508) on the shaft once the fixing
screws (507) have been removed;
- the seals (54a) and (54b) follow and become unusable;
- withdraw the fixing screws of the rear inner cover (53);
- withdraw the fixing screws (273) from the rear bearing
housing (6);
- using two levers or a soft hammer, release the rear bearing
housing (6). Release the bearing housing by sliding it on the
shaft.
- Remove all traces of sealant located on the housing on the
frame;
- put the dismantled components to one side. Recover the
preload washers (59) which are to be relocated in their housing
(as is the case for the 315 S).
12.5.2 - Removing the front bearing housing
- Remove the front bearing housing without releasing the rotor
(3).
To do this:
- release the key (21);
- slide the seals support (506) on the shaft once the fixing
screws (505) have been removed;
- the seals (39a) and (39b) follow and become unusable;
- withdraw the fixing screws of the front inner cover (33);
- withdraw the fixing screws (270) from the front bearing
housing;
- using two levers or a soft hammer, extract the rear bearing
housing (5), keeping the latter straight;
- release the bearing housing by sliding it on the shaft;
- remove all traces of sealant located on the housing on the
frame;
- put the dismantled components to one side. Recover the pre
load washers (59) (in the case of 315 M to 355 LD).
12.5.3 - Changing the bearings
- Using a suitable lifting device, extract the rotor without making
contact with the winding;
- release the front (38a) and rear (38b) circlips;
- extract the bearings (30) and (50) using a suitable tool whilst
protecting the end of the shaft extension. Avoid making contact
with the shaft support surface;
- change the bearings in accordance with the instructions
described in General section of § 10.2. (hot fitting only).
NOTE: Before carrying out any operations read § “CHECKS
BEFORE REFITTING”.
12.5.4 - Re-fitting
- Each bearing housing must be fitted with a continuous bead
silicone or polyurethane sealant at the housing on the frame;
- fit the front bearing (30) on the rotor shaft, do not forget the
inner cover (33);
- if and only if the internal Ø of the stator allows them to pass
through, fit the rear bearing (50) not forgetting the inner cover (53);
- refit the front (38a) and rear (38b) circlips;
- introduce the rotor into the stator taking care not to make
contact with the winding. Fit the non held bearing in place, do
not forget the inner cover if this has not already been done;
- do not forget to refit the pre load washers (59) in their housing;
- start with the held bearing housing (see above).
Fit a pin in one of the inner cover threaded holes to align the
grease feed pipes.
- Finish with the non-held bearing housing. Fit a pin in one of
the inner cover threaded holes to align the grease feed pipes.
- Lift the rotor slightly and fit the bearing housings on the frame.
From this point on we recommend that at every step you
check that the motor rotates freely by hand before moving
on to the next instruction.
- Refit the bearing housing (270) and (273) fitting screws in
position and tighten the nuts diagonally to the recommended
torque (see § 10.2.4).
- refit the inner cover fixing screws (33) and (53). Replace the
AZ washers to ensure a perfect seal;
- grease and fit a new inner seal (54b) in the rear seal support
(508), a new inner seal (39b) in the front seals support (506).
The seal lips must be aligned on the exterior side of the bearing
housings.
- Refit the front seal support (506);
- refit the fixing screws (505) support for the front seal support
(506);
- refit the rear seal support (508);
- refit the fixing screws (507) for the rear seal support (508);
- replace the AZ washers to ensure a perfect seal;
- refit a new seal (39a) against the front seal support (506)
using a drift, as well as a new seal (54a) against the rear seal
support (508) after greasing them;
- refit the fan (7) fitted with its key;
- refit the shaft extension screw with its washer;
- refit the cover (13);
- grease the front and rear bearings.