Coupling Alignment - Wilo Atmos GIGA-N Mode D'emploi

6.7.1

Coupling alignment

1. Axial displacement (ΔKa)
2. Angular displacement (ΔKw)
3. Radial displacement (ΔKr)
Installation and operating instructions Wilo-Atmos GIGA-N
Installation and electrical connection
hot fluids.
Adjustment may be required if the pump is required to pump very hot fluids:
• Allow the pump to run at the actual operating temperature.
• Switch off the pump then immediately check the alignment.
Precondition for reliable, smooth and efficient operation of a pump unit is proper align-
ment of the pump and the drive shaft.
Misalignments can be the cause of:
▪ excessive noise development during pump operation
▪ vibrations
▪ premature wear
▪ excessive coupling wear
S
max.
∆Ka
S
min.
) 1
Fig. 11: Coupling alignment without spacer
S2
max.
∆Ka
S2
min.
) 1
Fig. 12: Coupling alignment with spacer
▪ Adjust the gap ΔKa within the permissible range of deviation.
Permissible deviations for dimensions S and S2, see table "Permissible gaps S and S2"
The angular displacement ΔKw can be measured as the difference between the gaps:
ΔS = S – S and/or ΔS2 = S2
max. min.
The following condition must be met:
ΔS and/or ΔS2 ≤ ΔS (perm. = permissible; ΔS
perm.
If required, the permissible angular displacement ΔKw can be calculated as follows:
ΔKW in RAD = ΔS /DA
perm. perm.
ΔKW in GRD = (ΔS /DA) x (180/π)
perm. perm.
(with ΔS in mm, DA in mm)
perm.
The permissible radial displacement ΔKr
missible shaft displacement". Radial displacement is dependent on the speed. The nu-
merical values in the table and their interim values can be calculated as follows:
ΔKr = ΔS = (0.1+DA/1000) x 40/√n
perm. perm.
(with speed n in rpm, DA in mm, radial displacement ΔKr
Coupling size DA [mm]
68
68
80
80
95
95
110
110
125
125
140
140
160
160
180
180
S
max.
S
min.
) 2
S2
max.
S2
min.
) 2
– S2
max. min.
is dependent on the speed)
perm.
can be taken from the table "Maximum per-
perm.
in mm)
perm.
S [mm]
2 ... 4
2 ... 4
2 ... 4
2 ... 4
2 ... 4
2 ... 4
2 ... 6
2 ... 6
en
) 3
) 3
S2 [mm]
5
5
5
5
5
5
6
6
59