48 | Flameproof motors
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ATTENTION
To make that feasible it is necessary
that bolts 4 and 6 of the other
bearing half be loose.
- Roll out (be careful not to use excessive force)
the lower half of the bearing liner and remove it.
ATTENTION
By using either a chain block or a
jack, raise the end of the rotor at
which the work is being done
aproximately 0.1 to 0.3mm so as to
remove the weight from the bottom
half of the bearing and not damage
the flameproof labyriths.
- Loosen and remove the bolts (17) securing the
bottom half of the stationary baffle (9) to the seal
carrier. Loosen and remove the bolts (8)
securing the bottom half of the seal carrier (18)
to the bearing housing. Remove the seal carrier.
- Loosen and remove the bolts (4). Remove the
bottom bearing housing (2).
- Remove the frame cover (3).
- Thoroughly clean and inspect all individual parts
which have been removed. Clean the interior of
the bearing housing.
- To reassemble the bearing system, follow the
preceding instructions in the reverse order.
NOTE
Fastening torque of the bearing fixing
bolts to the motor = 10 Kgfm.
Non drive end side:
- Thoroughly clean the exterior of the bearing
housing. Loosen and remove the oil drain plug
(1) at the bottom of the bearing housing. Drain
the oil from the bearing housing.
- Loosen and remove the bolts (17) and remove
the external cover (9).
- Loosen and remove the bolts (4) that fix the top
bearing housing (5) to the motor frame cover
(3).
- Loosen and remove the bolts (6) that join the
top and bottom half of the bearing housing (2
and 5).
- Use the lifting eyebolts (7) to lift (by hand or
hoist) the top half of the bearing housing (5)
straight up, that the cap is completely
disengaged from the lower halves of the bottom
bearing housing (2) and the bearing liner (10).
- Lift (by hand or hoist) the top half of the bearing
liner (11) and remove it.
- Loosen and remove the bolts at the split line of
the oil ring (12). Carefully disengage the dowels
holding the oil ring halves together and remove
the oil ring.
- Remove the garter spring that encircles the
labyrinth seal. Remove the top half of the seal,
then rotate the bottom half of the seal out the
groove in the bearing housing and remove it.
- Disconnect and remove RTD's, thermocouples,
or any other temperature detecting instruments
that enter the lower half of the bearing liner.
- Using a hoist or jack, raise the shaft slightly so
that the lower half of the bearing liner (10) can
be rolled out of the bearing housing.
- Roll out (be careful not to use excessive force)
the bottom half of the bearing liner (10) and
remove it.
ATTENTION
By using either a chain block or a
jack, raise the end of the rotor at
which the work is being done
aproximately 0.1 to 0.3mm so as to
remove the weight from the bottom
half of the bearing and not damage
the flameproof labyriths.
- Loosen and remove the bolts (4) and remove
the bottom bearing housing (2).
- Remove the motor frame cover (3).
- Thoroughly clean and inspect all individual parts
which have been removed. Clean the interior of
the bearing housing.
To reassemble the Bearing System, follow the
preceding instructions in the reverse order.
NOTE
Fastening torque of the bearing fixing
bolts to the motor = 10 Kgfm.
8.2.10.4 SLEEVE BEARING ASSEMBLY
Check contact face and mounting recess of the
bracket making sure it is clean and properly
machined. Inspect shaft to ensure it is smooth (R
a
0.4, equivalent to 32 micro-inch finish, or better),
within the dimensions and tolerances given by the
bearing manufacturer and is free of burr or any
rough spots.
After removing the upper part of the housing (2)
and the bearing liner (10 and 11) the interior of the
housing and the running surfaces of the liner are to
be cleaned thoroughly and checked for any
damage caused in transit.
With the shaft slightly, locate the bearing base into
the mounting recess of the machine end shield and
bolt into position.
Apply oil to spherical seats in the housing base and
the shaft and rotate the bottom liner half (10) into
position. Special care must be taken so that the