Caution
Omega
50
Trouble--shooting
General
The faults listed below shall serve as orientation only when de-
termining failure causes.
In a complex plant system, all other components will have to be
included in the search for possible failure causes.
The coupling shall give low--noise and vibration--free operation
in all phases of operation. Any other operating behaviour shall
be considered a fault which must be remedied immediately.
Trouble--shooting list
Before commencing any maintenance, repair or
other work on the coupling, the operator must shut
down the entire driving mechanism. The drivers, in parti-
cular, must be secured against inadvertent start--up.
Also, the accident prevention regulations in force at the in-
stallation site shall be complied with.
Fault
Possible causes
Remedy
Sudden change in noise level and/or
Misalignment
Shut down the unit.
sudden vibrations
Eliminate cause for misalignment, if any.
(E.g. re--tighten the foundation bolts).
Inspect for wear, proceed as described
in section ”Coupling -- Maintenance and Repair”
Flexibles are worn
Shut down the unit.
Torque transmission by
Dismantle the coupling and remove what is left of the
metal--to--metal contact
flexible coupling blocks.
Inspect the coupling parts and replace
any damaged components.
Coupling blocks shall always be replaced by complete
sets of new coupling blocks; only use.
coupling blocks with identical markings.
Verify alignment and correct, if necessary.
Check the tightening torques of the screwed connec-
tion between parts 2 and 3.
Maintenance and repair
General
The torsional play between the two coupling parts shall be
checked in acc. with the maintenance schedule of the plant, but
at least once a year.
If torsional play must not be limited for extremely smooth cou-
pling operation, the plastic flexibles can be allowed to wear
down to approx.
¼
of their original thickness before they have
to be replaced. To assess the wear condition of the coupling
blocks, the table below indicates the permissible torsional play
as indicated by the chord dimension
D
S
V
on the outside cou-
pling diameter.
To determine the chord dimension
D
S
V
, rotate one coupling part
by hand up to the stop and mark the coupling parts (see illustra-
tion). Hand--rotate one coupling part into the opposite direction
up to the stop. The two marks will diverge. The distance bet-
ween the marks is the chord dimension
D
S
V
. If
D
S
V
exceeds the
value given in the table, the flexible coupling blocks have to be
replaced.
Coupling blocks shall always be replaced
by complete sets of new coupling blocks;
only use coupling blocks with identical identification
numbers.
