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6.7.1
Coupling alignment
1. Axial displacement (ΔKa)
2. Angular displacement (ΔKw)
3. Radial displacement (ΔKr)
Installation and operating instructions • Wilo-Atmos GIGA-NHT • Ed.01/2023-10
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
ible shaft displacement". Radial displacement is dependent on the speed. The numerical val-
ues 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
200
200
("S" for couplings with a spacer and "S2" for couplings with a spacer)
Table 5: Permissible gaps S and S2
Coupling size
ΔS
and ΔKr
perm.
1500 rpm
68
0.20
80
0.20
95
0.20
110
0.20
125
0.25
140
0.25
160
0.30
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 permiss-
perm.
in mm)
perm.
S [mm]
2 ... 4
2 ... 4
2 ... 4
2 ... 4
2 ... 4
2 ... 4
2 ... 6
2 ... 6
2 ... 6
[mm]; speed dependent
perm.
1800 rpm
3000 rpm
0.20
0.15
0.20
0.15
0.20
0.15
0.20
0.15
0.20
0.15
0.25
0.20
0.25
0.20
en
) 3
) 3
S2 [mm]
5
5
5
5
5
5
6
6
6
3600 rpm
0.15
0.15
0.15
0.15
0.15
0.15
0.20
21
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