en
Installation and electrical connection
24
WILO SE 2020-10
∆Ka
∆Kw
∆Kr
S2
max
.
S2
min.
S2
max
.
S2
min.
)
3
)
2
)
1
Fig. 18:
Coupling alignment with spacer
1. Axial displacement (ΔKa)
ƒ
Adjust the gap ΔKa within the permissible range of deviation.
Permissible deviations for dimensions S and S2, see table “Permissible gaps S and
S2”
2. Angular displacement (ΔKw)
The angular displacement ΔKw can be measured as the difference between the gaps:
ΔS = S
max.
– S
min.
and/or ΔS2 = S2
max.
– S2
min.
The following condition must be met:
ΔS and/or ΔS2 ≤ ΔS
perm.
(perm. = permissible; ΔS
perm.
is dependent on the speed)
If required, the permissible angular displacement ΔKw can be calculated as follows:
ΔKW
perm.
in RAD = ΔS
perm.
/DA
ΔKW
perm.
in GRD = (ΔS
perm.
/DA) x (180/π)
(with ΔS
perm.
in mm, DA in mm)
3. Radial displacement (ΔKr)
The permissible radial displacement ΔKr
perm.
can be taken from the table “Maximum per-
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
perm.
= ΔS
perm.
= (0.1+DA/1000) x 40/√n
(with speed n in rpm, DA in mm, radial displacement ΔKr
perm.
in mm)
Coupling size
DA [mm]
S [mm]
S2 [mm]
68
68
2 ... 4
5
80
80
2 ... 4
5
95
95
2 ... 4
5
110
110
2 ... 4
5
125
125
2 ... 4
5
140
140
2 ... 4
5
160
160
2 ... 6
6
180
180
2 ... 6
6
200
200
2 ... 6
6
(“S” for couplings with a spacer and “S2” for couplings with a spacer)
Table 8:
Permissible gaps S and S2
Coupling size
ΔS
perm.
and ΔKr
perm.
[mm]; speed dependent
1500 rpm
1800 rpm
3000 rpm
3600 rpm
68
0.20
0.20
0.15
0.15
80
0.20
0.20
0.15
0.15
95
0.20
0.20
0.15
0.15
110
0.20
0.20
0.15
0.15
125
0.25
0.20
0.15
0.15
140
0.25
0.25
0.20
0.15
160
0.30
0.25
0.20
0.20
180
0.30
0.25
0.20
0.20
200
0.30
0.30
0.20
0.20
Permissible shaft displacement ΔS
perm.
and ΔKr
perm.
in mm (during operation, rounded)
Table 9:
Maximum permissible shaft displacement ΔS
perm.
and ΔKr
perm.
