Siemens SIMOTICS SD SH 71 315 Series, Руководство по эксплуатации

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Operation
8.6 Faults
1LE7 shaft heights 71 ... 315
Operating Instructions, 04/2022, A5E51689275A-AA
87
8.6.3 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 motor 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
comprising 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 motor.
(1)
Take any changes into account when warming up the motor.
8.6.4 Rolling bearing faults
Damage to rolling bearings can be difficult to detect in some cases. If in doubt, replace the
rolling bearing. Use other bearing designs only after consulting the manufacturer .
Table 8- 3 Rolling bearing faults
↓ Bearing overheats
↓ Bearing "whistles"
↓ Bearing "knocks"
Possible causes of faults Remedial measures
X
High coupling pressure Align the motor more accurately.
X
Belt tension too high Reduce the drive belt tension.
X
Bearing contaminated Clean or replace the bearing. 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 Contact the service center.
X X
Insufficient bearing play Contact the service center.
X Excessive bearing play Contact the service center.
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.
X Friction marks on raceway Replace the bearing.
X Brinelling or scoring Replace the bearing. Avoid any vibration at standstill