Siemens SIMOTICS XP 1LA5 - Page 60

Operation
Explosion-protected machines
132 56100000002002, 01/2016
Table 8-2 Mechanical effects
Mechanical fault characteristics
↓
Grinding noise
↓
Overheating
↓
Radial vibrations
↓
Axial vibrations
Possible causes of faults
Remedial measures
1)
X
Rotating parts are grinding Determine cause and adjust parts
concerned
X
Reduced air supply, fan possibly
rotating in the wrong direction
Check airways, clean machine
X
Rotor not balanced. Check feather key declaration (H,
F, N)
X
Rotor out of true, shaft bent
Please consult the manufacturer.
X
X
Poor alignment Align machine set,
check coupling.
2)
X
Coupled machine not balanced
Re-balance coupled machine
X
Surges from coupled machine
Inspect coupled machine
X
X
Imbalance originating from gearing
Adjust/repair gearing
X
X
Resonance in the overall system
(comprising machine and founda-
tion)
Reinforce foundation following
consultation
X
X
Changes in foundation Determine cause of changes;
eliminate if necessary; realign
machine
1) As well as eliminating the cause of the fault (as described under "Remedial
measures"), you must also rectify any damage the machine may have suffered.
2) Note any changes that take place while the temperature is rising.