Alignment (Rolling Bearings) - Siemens 1D Series Operating Manual

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4.2.9 Alignment (rolling bearings)

CAUTION
Clutch cover – alignment of generator (motor) with drive machine
Alignment of electric machine with drive machine and covering the clutch must be done this way,
that clutch together with cover never create negative pressure on the front side of the bearing. In the
case you do not keep this condition it can happen oil taking from the bearing, oil leakage and
dripping through bearing seals.
Flexible connections must be used to connect generator and driving machine mechanically. The coupling
must transmit only torsion moment from driving machine that must get rid of impact peaks that are produced
especially by combustion engines. Further, it must attenuate all axial and radial vibrations of driving machine.
Coupling must be dynamically balanced, it itself must not be a source of any undesirable forces and
vibrations.
The thermal expansion of the shaft in axial and radial direction for the machine specified in the manual
"Dimension drawing text"
That extension should be considered in motor clutch system design.
For additional information see Annex, or contact us.
Prior to assembly of connection on the generator shaft, preservative coat must be removed and the shaft
should be slightly varnished with oil. Concerning actual assembly of a installation on the shaft, it is
recommended to use assembly jig that will fit in a thread in generator shaft.
Coupling must not be pulled on shaft by force.
When pulling down the connection from the shaft, it is necessary to use pulling jig.
WARNING
It must be ensured that in mounting and dismounting the coupling was not damaged drive shaft end.
When connection the generator with another machine is to be ensured that the shaft of both machines are
aligned. Frontal plane of both coupling mounted on the machine shaft must be exactly perpendicular to the
axis.
4.2.9.1 Shaft alignment
Alignment of the shafts for the establishment of machinery based on setting and check according to
so that the measured indicator or other suitable device dimensions A and B at 0°, 90°, 180°, and 270° (0°,
120°, 240° hampers the base), while rotation of the coupling halves
Coupling of a set must be adjusted by means of two indicators or another appropriate device according to
9) . Tolerance that is determined by a producer of connection should be reduced as much as possible
(Fig.
because every slightest defect will cause disproportionate increase of burden on bearings and coupling. Check
the coupling during the steady operating temperature, and record the parameters to the logbook.
Product documentation 1D 3.8.en
Rev. E, 10/13
(Fig. 9).
page 23/42
(Fig. 9),