RATHI DISC-O-FLEX RLM - Breakdown & Trouble-Shooting

Installation & Operating Manual /DISC-O-FLEX/RLM,RLMK
RATHI TRANSPOWER PVT.LTD. Gaia Apex,S No 33/2D,Viman Nagar R-II-D-03/02-09/20
Pune, 411014 Page 12 of 15
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8. Breakdown & Trouble Shooting
 The coupling must run with low vibration and noise during operation. any abnormal
behaviour may damage the product or drive unit.
 Following are some possible causes of failure with corrective actions.
SR.
NO.
FAILURE MODE
PROBABLE CAUSES
CORRECTIVE ACTIONS
IMAGE
1
Cracking of blade
packs
Premature shaft
bearing failure
Excessive
misalignments.
Check for,
- loose base plate bolts,
- Component thermal
expansion
- Change in the assembly
gap of the coupling.
Replace the Blades
2
Fatigue of Blades
Torsional vibration
Excessive starts and
stops
conduct a torsional vibration
analysis
3
Elongation of Blade
holes
Loose coupling bolts
Change the blade assembly
on both the ends
Tighten the bolts to required
tightening torque
5
Blade Deformation
Torque Overload
Abnormal axial load
Check sizing and Service
Factor of Coupling
Review operational history
for any abnormalities.
If found unsuitable, replace
with suitable size
6
Coupling bolt
distortions
7
HUB bursting
Torsional shock
overload