CleaverBrooks 4WI, Руководство по эксплуатации, обслуживанию и запасным частям

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750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual 8-25
8.17 — Air Pump and Lubricating System
8.17.6 — Lube Oil Cooling Coil
The fins on the tubing must be kept clean and free of any dust or dirt that would resist air flow and cause overheat-
ing. Use an air hose to blow away debris. Internal cleaning of the tubes is seldom required if a good quality lube oil
is used.
8.17.7 — Flexible Coupling Alignment
Alignment of the pump and motor through the flexible cou-
pling is extremely important for trouble free operation.
Check the coupling alignment semi-annually and replace the
coupling insert as required. Keep the coupling guard in place.
The most commonly used tools for checking alignment are a
small straightedge and a thickness gauge.
The coupling must be checked for both parallel (offset) align-
ment and angular (gap) alignment. Parallel misalignment
exists when shaft axes are parallel but not concentric. Angular
misalignment is the reverse situation, with shaft axes concen-
tric but not parallel.
FIGURE 8-30.
Flexible Coupling Alignment
Checking parallel alignment, both horizontal and vertical, can be accomplished by laying a straightedge across the
coupling halves and checking with a thickness gauge to obtain the amount of misalignment. The check should be
done on the top of the coupling and at 90 degrees. A useful aid is to hold a flashlight behind the straightedge so
that any gap can readily be seen.
Shim stock of appropriate thickness and area is then used under either the feet of the pump or the motor to estab-
lish parallel alignment. A tolerance of .008” is a permissible limit.
After parallel alignment is established, check for angular alignment, which is done by checking the gap between
coupling halves. The coupling should have a minimum gap of 1/16” and a maximum of 3/32”.
Set the spacing between the halves at one point by using a thickness gauge and then rotate the coupling slowly to be
sure that clearance at that point remains the same through 360 degrees of rotation. Adjust to obtain proper gap by
loosening the hold-down bolts and shifting either the pump or the motor as required. Generally, a slight tapping on
either the front or rear legs is all that is needed to obtain lateral adjustment. Rear legs may require shimming for ver-
tical correction.
Tighten the hold-down bolts after adjustments are made and recheck the alignment.
Calipers can also be used to check angular alignment. Measure the overall distance of the outer ends of the coupling
halves at 90º intervals. Shift the pump or motor, as required, so that the ends of the coupling are the same distance
apart at all points. The coupling will then have proper angular alignment.