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Figure 3-2. Measuring the run-out at the coupling half.
3.2.2 Alignment of machines
In order to ensure a long and satisfactory lifetime of both the driving and driven
machine, the machines have to be properly aligned to each other. This means that
the radial, as well as the angular deviation between the two shafts of the machine
has to be minimized. The alignment must be performed with great caution
because alignment errors will lead to bearing and shaft damages.
Before alignment remove the transport locking device. After the machine has been
roughly positioned, the final alignment can start.
NOTE: Alignment must be performed with great caution. Failure to do so can
result in serious vibrations and damage to both driving and driven
machine.
Alignment of the generator with coupling discs
In accordance with common practice, parallel and angular misalignment should
not exceed 0.05-0.10 mm and axial misalignment should not exceed 0.10 mm,
(see
Figure 3-3. Checking of misalignment of coupling discs
below).
Figure 3-3. Checking of misalignment of coupling discs.
NOTE: Definite alignment tolerances are impossible to state as many factors
influence the tolerances. Too large tolerances will cause vibration and
may possibly lead to bearing or other damages. It is, therefore,
recommended to aim at as narrow tolerances as possible. Misalignments
above are maximum permissible misalignment.
In general, during the alignment tighten the screws to the recommended torque,
see
Chapter 7.4.4. The tightness of fastening
and check that there is lateral play on
the crankshaft. (0.1-0.6 mm)
