Gardner Denver Reavell 5236, Руководство по эксплуатации и техническому обслуживанию

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APP 011 BELT DRIVE
Page 1
DRIVE RECOMMENDATIONS (V-BELT TRANSMISSION)
Details of drive arrangements and non isolation pad mountings are available from Reavell Works, Ipswich.
An overload device must always be fitted to motors.
Manufacturer’s terminal box wiring instructions must be observed.
It is recommended that for efficient maintenance scheduling an hours run meter be incorporated on the
diesel engine or fitted to the motor starter.
Belt Drive:
It is very important that the driving and driven pulley grooves are in line and both pulley shafts parallel. V-belt
tensioning procedures follow normal BS.3790, 1981 practice.
TYPICAL DRIVE ARRANGEMENT
Belt Drive Tensioning:
Recommended Practice for Installation Tension in Belt Drives:-
It is necessary to be able to measure the belt tensions with sufficient accuracy to avoid belt slip or
overloaded bearings or to meet particularly arduous conditions.
Measure the length of the span in millimetres. At the centre of the span apply a force with a spring scale in a
direction perpendicular to the span, until the belt is deflected from the normal by an amount equal to 0.015
mm for every millimetre of span length. For example, the deflection for a span of 1 metre would be 1000 mm
x 0.015 mm or 15 mm.
In all cases it is essential that the pulley centres be fixed and that the larger pulley be then rotated at least
four times before making the measurement. On a multiple belt drive it is essential that a matched set of belts
be used and the above procedure be carried out on each belt.
A measured value below the Basic force in the table indicates under tensioning, whilst a measured value
above the Basic force indicates over tensioning. When starting up a drive with new belts, the drive should be
tensioned to the New Belt force, before re-tensioning to the Basic force following a 15 – 20 minute run under
load conditions to allow for the normal drop in tension during the running in period.
All belts should be watched carefully during the running in period after initial start-up. Re-tensioning and
checking for wear should be carried out every 2000 hours using the above procedure for alignment and
tensioning.
Use straight edge for alignment.
Use straight edge
Use distance pieces
as necessary
Tension & alignment adjusting screws (may be on prime mover)
Compressor
Prime
Mover