Andritz SD 39 Série Instructions De Service page 19

Series SD 39
• Place temporary chocks (2) underneath the baseplate (1).
(2)
• Check the alignment of pumps on the flange machined sur-
faces using a spirit level. A margin of error of 1 mm in 1 m is
allowed.
(M)
• Pour the foundation bolts (3) into place with cement (4) leav-
ing it proud around the bolts (see figure foundation bolts).
• 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, H with stub
shaft)
Pump and motor shafts were carefully aligned before delivery.
Displacement can occur during transport thus coupling align-
ment must be checked before pourring 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 or pump area. Larger baseplates require mul-
tiple packing.
• Correct lateral misalignment between pump and motor by
slackening the motor fastening bolts, aligning the motor with
the pump and re-tightening.
• Tighten foundation bolts.
20
(3)
(1)
(6)
(5)
(4)
Foundation bolts
(M)
Pump alignment on the flanges
After tightening the foundation 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.
• 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.
• Align the coupling halves in both axial and radial directions.
• Maximum permissible axial discrepancy on the coupling face
is 0.05 mm. Preferred value > 0.03 mm. (measure on the out-
side!).
• Maximum permissible radial discrepancy of coupling periph-
ery is 0.10 mm. Preferred value > 0.05 mm.
Correcting vertical alignment
Aligning with a straight steel edge
Distance
c
2-3 mm
2-4 mm
3-6 mm