Operation
8.7 faults
1LE5, 1PC4 shaft height 315/355
Operating Instructions, 10/2020, A5E41454666A
89
8.7.3
Mechanical faults
Table 8- 2
Mechanical faults
↓
Grinding noise
↓
Radial vibrations
↓
Axial vibrations
Possible causes of faults
Remedial measures
X
Rotating parts grind
Establish the cause and realign the parts.
X
Rotor or coupling not balanced.
Disconnect the rotor or coupling and rebalance.
If the machine has two shaft ends, and a transmission element is
only fitted to one end, secure the fitted key at the other end to
prevent it from being thrown out. If the rotor has balance type "H"
(standard type), the fitted key must be cut back to roughly half of
its length.
X
Rotor out of round, shaft bent
Consult the manufacturing plant.
X X Poor alignment
Align the machine set; check the coupling.
(1)
X
Coupled machine not balanced
Rebalance the coupled machine.
X Shocks from coupled machine
Investigate the coupled machine.
X X Uneven running of gear unit
Fix the gearing.
X X Resonance of the overall system com-
prising motor and foundation
Stabilize the foundation following consultation.
X X Changes in foundation
Establish the cause of the changes and eliminate them if necessary;
realign the machine.
(1)
Take any changes into account when warming up the machine.
