Mechanical Faults - Siemens SIMOTICS XP 1MB155 Operating Instructions Manual

Operation
8.6 faults
8.6.3

Mechanical faults

Table 8- 2 Mechanical faults
↓ Grinding noise
↓ Radial vibrations
↓ Axial vibrations
Possible causes of faults
X Rotating parts grind
X Stator or coupling not balanced.
X Rotor out of true, shaft bent
X X Poor alignment
X Coupled machine not balanced
X Shocks from coupled machine
X X Uneven running of gear unit
X X Resonance of the overall system com-
prising motor and foundation
X X Changes in foundation
Take any changes into account when warming up the machine.
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Remedial measures
Establish the cause and realign the parts.
Disconnect the stator 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.
Consult the manufacturing plant.
Align the machine set; check the coupling.
Rebalance the coupled machine.
Investigate the coupled machine.
Fix the gearing.
Stabilize the foundation following consultation.
Establish the cause of the changes and eliminate them if neces-
sary; realign the machine.
Operating Instructions, 03/2018, A5E41926185A
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