KSB Etanorm V, Operating Manual

Page: 17 / 62

4 Description of the Pump (Set)
17 of 62
Etanorm V
1228.87/01-EN
For operating an Etanorm V on a frequency inverter which has not been configured
via the KSB selection tool consultation with KSB is required.
For operating pump sets at immersion depths > 1000 mm with variable-speed system
consultation with KSB is required for the selection.
4.6 Design and function
1
14
15
16
2, 3
4
5
6
7
8
9
10
11
12
13
Fig. 6: Sectional drawing
1 Motor housing 2, 3 Rolling element bearings
4 Drive lantern 5 Cover plate
6 Shaft 7 Overflow opening
8 Support column 9 Shaft passage
10 Casing cover 11 Impeller
12 Suction nozzle 13 Discharge nozzle
14 Riser 15 Volute casing
16 Clearance gap
Design The pump is designed with an axial fluid inlet and a radial outlet. The hydraulic
system is rigidly connected to the motor via a stub shaft and runs in a product-
lubricated SIC/SIC plain bearing on the impeller side, which compensates any lateral
movement or deflection of the shaft. Thanks to the graded lengths of support
column (8) and shaft (6) the pump set can be matched to various immersion depths.
The pump set is mounted on a cover plate (5). The discharge nozzle of the volute
casing (15) is connected with the discharge nozzle (13) of the cover plate via a riser
(14). If on request the pump set is supplied without cover plate and riser, it is
supplied with a bracket.
Function The fluid enters the pump via the suction nozzle (12) and is accelerated outward by
the rotating impeller (11). In the flow passage of the pump casing the kinetic energy
of the fluid is converted into pressure energy. The fluid is pumped to the discharge
nozzle (15), where it leaves the pump. The clearance gap (16) prevents any fluid from
flowing back from the casing to the suction nozzle. At the rear side of the impeller,