KSB HPK-L, Installation & Operating Manual

Page: 19 / 74

4 Description of the Pump (Set)
19 of 74
HPK-L
1136.8/15-EN
4.6 Configuration and function
1
3
2
6
10
9
4
8
7
5
Fig. 8: Sectional drawing
1 Clearance gap 2 Discharge nozzle
3 Casing cover 4 Drive shaft
5 Bearing bracket 6 Shaft seal
7 Suction nozzle 8 Impeller
9 Plain bearing, pump end 10 Rolling element bearings, drive end
Design The pump is designed with an axial fluid inlet and a radial or tangential outlet. The
hydraulic system runs in its own bearings and is connected to the motor by a shaft
coupling.
Function The fluid enters the pump axially via the suction nozzle (7) and is accelerated
outward by the rotating impeller (8). 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 (2), where it leaves the pump. The clearance gap (1) prevents
any fluid from flowing back from the casing to the suction nozzle. At the rear side of
the impeller, the shaft (4) enters the hydraulic system via the casing cover (3). The
shaft passage through the cover is sealed towards the atmosphere with a shaft seal
(6). The shaft runs in a pump-end plain bearing (9) and drive-end rolling element
bearings (10). The bearings are supported by a bearing bracket (5) linked with the
pump casing and/or casing cover.
Sealing The pump is sealed by a KSB mechanical seal as standard. A standardised mechanical
seal with shaft sleeve is available as an option.