Changing Bearings, Lubrication - Siemens 1PM4 Manual Del Usuario

6. Disconnect the shielded lead of the encoder from the terminal
box pedestal
7. Unscrew the strain relief clamp from the non-drive end shield.
8. Unscrew the screws (8.53), remove the encoder (8.51) and pull
its cable through the non-drive endshield and pull the encoder
lead through the non-drive end shield.
Assembly
CAUTION
Damage to the encoder and encoder wheel!
Assemble carefully. The encoder and wheel must not
be touching when assembled.
Please follow the encoder instruction manual.
The gap between the encoder wheel (8.50) and encoder (8.51) is
set with a 0.15 mm feeler gage.
The gauge and operating instructions GEL 244 are part of the scope
of delivery.
1. Slide the head of the encoder radially outwards in the non-drive
endshield until it meets the stop, tighten the screws (8.53) with a
torque of 2 Nm.
2. Attach the encoder lead to the non-drive end shield with a strain
relief clamp.
3. Connect the adapter plug of the encoder lead to the flange
connector in the terminal box.
4. Secure the plug connection with shrink tubing.
5. Lay a shielded lead from the encoder to the terminal box screw.
6. Heat the encoder wheel (8.50) to approx. 150
slide onto the shaft up to the stop. Set clearance!
7. Grease the O-ring before fitting. Secure the cover (6.83),
together with sealing ring or O-ring, with screws (6.97).
8. Slide on the GAMMA ring (6.96) up to the press on distance
(9.5 ± 0.2, fig.2). The L37 has no lip seal. Shrink on the balancing
disc, maintain clearance (2,5
5.3

Changing bearings, lubrication

Bearing replacement intervals
Bearing replacement intervals t
according to fig. 9.1.
It is recommended to replace the bearings at the drive and non-drive
ends after reaching the stated operating hours, or after 3 years at
the latest.
We also recommend replacing a self-fitted encoder in order to avoid
the encoder breaking down.
The values t apply to:
LW
- Horizontal fitting
- Coolant temperature +30°C (86
- Maximum bearing temperature +85°C (185
- Operating speedn in continuous operation at max. 75% of the
m
limit speed n
max
- Vibrations with vibration severity grade SR according to
EN 60034-14.
Estimate the mean operating speed n
The bearing replacement intervals t
under more severe conditions, e.g. vertical fitting, operating above
75 % of the limit speed n , high vibration and impact loads, frequent
max
reverse operation etc.
The value t must be halved for each additional 15°C (59
LW
which the bearing temperature exceeds +85°C (185
Disassembly
1. Mark the original positions of the parts in relation to one another
(e.g. with a marker pen or a scribing iron) in order to simplify the
re-assembly procedure.
2. Remove the residual cooling water or oil.
CAUTION
Oil and cold insulators are a hazard to the environment.
Dispose of these products and all parts which are to be
scrapped according to the currently valid regulations.
6
0 C (302 0 F) and
±0,3 , Fig. 2)!
for normal operating conditions
LW
0
F)
0 F)
if the motor speed varies.
m
are reduced by up to 50%
LW
0
F) by
0
F).
ENGLISH
3. Fit the encoder according to 5.2.
4. Unscrew the screws out of the bearing cover and end shield on
the drive end, carefully remove the drive end shield.
5. Pull the rotor out of the motor stator.
6. Pull off the rolling contact bearings using a suitable device (see
Fig. 10.1).
Do not re-use the rolling contact bearings after they have been
pulled off.
Assembly
The bearings of the hollow-shaft motors, the standard design is
deep groove ball bearing with plastic bearing cage (fig. 2, 1.60).
Hybrid spindle bearings are used in option L37.
NOTE
Recommendations for replacing the bearings:
Obtain the bearings from the motor manufacturer (deep
groove ball bearing with special bearing clearance. In the
case of the L37, the hybrid spindle bearings are in a ><
arrangement).
Always replace the full set of sealing elements (radial shaft
seal, GAMMA rings).
L37 without WDR, without Gamma ring.
Ensure absolute cleanliness when changing the bearings.
1. Do not wash out the bearing before greasing.
Half fill the grease compartments (end shield, bearing cover)
with grease (see fig. 10.2).
Grease type: LUBCON THERMOPLEX 2TML (from Lubricant
Consult)
Grease quantity per bearing as per Fig. 9.2, grease must be
evenly distributed around the raceway.
2. Heat the rolling contact bearings inductively to between 80
0 0
and 100 C (176 F to 212
ring must be flush with the shaft shoulder. Do not hit hard.
3. Remove jointing medium residues from the drive end shield and
casing.
4. Apply Terostat 93 or an equivalent jointing medium to the sealing
surfaces.
5. Position the rotor inside the casing.
6. Check the bearing cover seals, replace if necessary.
7. Insert the drive end shield centrally into the motor casing
without canting it.
8. Tighten the screws in the bearing cover. Screw the drive
end shield up tightly. Torques specified in Fig. 7
9. Mount the encoder system according to 5.2.
10. In the case of the L37, check the vibrations, rebalance the
balancing disc if necessary.
Bearing run-in
The bearings need a running-in time under low load. To do this, run
the motors continuously up from 0 to 75% of the limit speed n
a period of 20 minutes.
In the case of the L37, repeat several times (3 or 4 times).
0
F) and push them on. The inner bearing
Siemens AG
0 C
over
max