Leroy-Somer CPLS 112, Руководство по установке и обслуживанию

Страница: 20 / 28

20
INSTALLATION AND MAINTENANCE
CPLS drip-proof 3-phase induction motors
4240 en - 2014.09 / b
LEROY-SOMER
6.2.3 - Reassembling the motor
Care must be taken to ensure that the stator is replaced in
its original position so that the stack of laminations is centred
correctly, and the rotor and stator are aligned correctly.
During reassembly, always check that the various seals are in
the correct position, and replace them if they are in poor
condition.
- See section 6.2.2 before reassembly.
- If necessary, insert the inner bearing retainers and bearing
spacer rings on the shaft.
- Screw a threaded rod with the same diameter as the screws
into one of the tapped holes of each bearing retainer to maintain
its angular position when refitting the shield.
- Mount the new bearings on the shaft, see section 6.2.2 on
mounting bearings.
- Fit the circlip(s).
- Insert the rotor in the stator (1), taking care not to knock the
winding.
- If the motor has tie rods, pass them into the stator.
- Position the preloading washer with a small amount of grease
at the back of the bearing cage of the DE shield (5). Don't forget
the bearing spacer rings, if any, and run all the connection
cables through (stator and any accessories), then refit the
shield, positioning it on the stator (1) with a lifting system.
- Position the NDE shield (13) on its rods/pins, not forgetting
the bearing spacer rings, if any, before pushing it up against
the stator.
- Semi-tighten the shield fixing screws to hold the assembly in
position.
- Check the alignment of each end shield with the housing.
(An angular defect could prevent the rotor rotating freely once
mounted on its base).
- Tighten the shield fixing nuts diagonally to the recommended
torque (see section 6.4). The lifting device can then be
removed.
- If necessary, fix the DE and/or NDE bearing retainer with its
screws.
- Fix the DE (6) and NDE (7) bearing retainer.
- Screw in the DE (8) and NDE (9) valves.
- Tighten the valve grub screws.
- Check that the rotor turns freely by hand and that there is no
axial play.
- Refit the DE (10) and NDE (11) grease traps.
- Fix the terminal box support plate (6).
- Refit the terminal box (8).
- Fix the terminal plate (7)
- Wire up the terminal plate, complying with the tightening
torques indicated in section 2.5.
- Refit the forced ventilation unit (11).
- Refit the encoder, and check how much the shaft driving the
encoder is out-of-round: 0.03 mm max. (A defect could quickly
damage the encoder).
- Replace the shaft extension key.