Andritz HP 45 Série Instructions De Service page 18

Series HP 45
• Before the cement sets, insert machined packing pieces (5)
on both sides of each foundation bolt. These pieces should be
attached leaving a minimum distance from the baseplate (1).
• When the cement has set, pack the gap with metal shims of
suitable thickness.
• Remove the temporary chocks (2).
3.3.2 Alignment of flexible couplings (E)
Pump and motor shafts are to be carefully aligned anew after
set-up. Thus coupling alignment must be checked before pour-
ring the baseplate.
• Correct vertical misalignment by packing under the base-
plate. For baseplates of up to 1600 mm only place packing in
the drive motor and/or pump area. Larger baseplates require
multiple packing.
• Correct lateral misalignment between pump and motor by
slackening the motor fastening bolts, aligning the motor with
the pump and re-tightening.
• Tighten fixing bolts.
After tightening the fixing bolts, the shaft must be free to be
turned by hand without any tight spots (construction with
packed glands: Packed glands must be slackened for this
test!). Alignment errors may cause premature failing of bear-
ings or couplings and result in noisy running.
3.3.2.1 Alignment using a straight steel edge
• Place the straight edge (1) axially across the top of the pump
and coupling halves.
• Measure the distances (a) and (b) between the straight edge
and the shafts.
• If the diameter of the pump and motor shaft is equal, then:
a = b.
• If the diameters differ, then: a + 1/2A = b + 1/2B.
• Repeat the exercise in various positions (displaced by ap-
prox. 90°). The requirements for equal or unequal shaft diam-
eters must be fulfilled in all positions.
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Correcting vertical alignment
Aligning with a straight steel edge
• Check the clearance between the coupling halves
(dimension c). For flexible claw-type couplings this should be:
Coupling Size
(outside diameter)
80-140 mm
160-225 mm
250-400 mm
Table 1: distance between the coupling halves
The distance c must be the same in all positions.
3.3.2.2 Alignment with dial gauges
High rotational speeds and/or spacer type couplings require
more precise alignment using dial gauges.
Alignment
• Align the coupling halves in both axial and radial directions.
• Firmly fix the dial gauges. Make measurements at four differ-
ent measuring points, each displaced by 90°, at turning both
coupling halves at the same time.
Axial measurement
• Correct differences by underlaying sheets. Do
not exceed remaining inaccuracy of 0.03 mm
referring to a measured circle diameter of
200 mm.
Radial measurement
• Correct discrepancies by displacing resp. un-
derlaying of corresponding sheets in order not
to surpass a remaining inaccuracy of 0.03 mm.
Refer to table 1 for adjusting the axial distance
between the coupling halves (dimension ‚c').
Combined axial and radial measurement
• It's a simple way to combine both measure-
ments. The dial gauges are inserted into the
corresponding borings of the flat bar elements
screwed-on or clamped, and then they are
fixed by e.g. studs.
3.3.3 Vertical pumps with disc coupling and lantern
mounted motor (S arrangement)
This pump arrangement may be installed on a plinth, concrete
foundation, structured steelwork or directly in the pipeline, de-
pending upon pump size and local conditions.
• Fasten the set to plinth.
• Align the pump (see para. 3.3.1).
• Underlay the pump foot.
• Insert fixing bolts with nuts into the pump foot, grout with ce-
ment and allow to set.
• Grout voids under the pump foot with non-shrinking cement
mortar.
Pumps supplied without motor:
• Measure the distance between motor and pump shaft.
• Put the motor side coupling half on motor shaft. Displace the
coupling half until it exceeds the motor shaft half of the value
measured as above.
• Spot-drill the motor shaft through thread of coupling half
(depth and diameter of drilling corresponding to the set screw
dog point).
• Screw in set screw with dog point and tighten well.
Distance
c
2-4 mm
2-6 mm
3-8 mm