Siemens SIMOTICS XP 1MD4, Инструкция по эксплуатации и монтажу, Страница: 72 / 128

↓ Grinding noise
↓ Radial vibrations
↓ Axial vibrations
Possible causes of faults Remedial measures
X Rotor out of true, 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.
8.7.4 Roller bearing faults
Note
Damage to roller bearings can be difficult to detect in some cases. If in doubt, replace the
bearing. Use other bearing designs only after consulting the manufacturer.
Table 8-3 Roller bearing faults
↓ Bearing overheats
↓ Bearing "whistles"
↓ Bearing "knocks"
Possible causes of faults Remedial measures
X High coupling pressure Align the machine more accurately.
X Belt tension too high Reduce the drive belt tension.
X Bearing contaminated Clean the bearing or replace it. Check the seals.
X High ambient temperature Use a suitable high-temperature grease.
X X Insufficient lubrication Grease the bearings as instructed.
X X Bearing canted Properly install the bearing.
X X Insufficient bearing play Only after consultation with the manufacturer: Fit a bearing with
greater play.
X Excessive bearing play Only after consultation with the manufacturer: Fit a bearing with
lower play.
X X Bearing corroded Replace the bearing. Check the seals.
X Too much grease in bearing Remove surplus grease.
X Wrong grease in the bearing Use the correct grease.
Operation
8.7 Faults
SIMOTICS XP 1MD4/1MD5
72
Operating Instructions 05/2015