Mechanical Faults; Table 8-2 Mechanical Faults On Water-Cooled Machines - Siemens SIMOTICS TN N-compact 1LH8 Operating Instructions & Installation Instructions

8.10.3

Mechanical faults

The following table shows the possible causes of and remedial measures for mechanical faults.
Table 8-2 Mechanical faults on water-cooled machines
↓ Grinding noise
↓ Overheating
↓ Radial vibrations
↓ Axial vibrations
Possible causes of faults
X Rotating parts are grinding
X Reduced cooling
X Rotor 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 Fault originating from gearing
X X Resonance of the overall system comprising ma‐
chine and foundation
X X Changes in foundation
Note any changes taking place during warm up
①
SIMOTICS TN Series N-compact 1LH8
Operating Instructions 06/2017
Remedial measures
Establish the cause and realign the parts.
Check the water flow.
Consult the manufacturing plant if necessary.
Decouple the rotor and then rebalance it.
Please consult the manufacturer.
Align the machine set and check the coupling
Rebalance the coupled machine.
Investigate the coupled machine.
Fix the gearing.
Reinforce the foundation after consultation with the
manufacturer.
Determine the cause and rectify it. Realign the ma‐
chine.
Operation
8.10 faults
.
①
89