4 Description of the Pump (Set)
20 of 72
HPK
4.5 Configuration and function
1
2
3
4
5
6
7
8
9
10
Fig. 6:
Sectional drawing
1
Clearance gap
2
Discharge nozzle
3
Casing cover
4
Shaft
5
Bearing bracket
6
Suction nozzle
7
Impeller
8
Shaft seal
9
Rolling element bearing, pump end
10
Rolling element bearing, motor 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 (6) and is accelerated
outward by the rotating impeller (7). 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 casing via the casing cover (3). The shaft passage
through the cover is sealed to atmosphere with a shaft seal (8). The shaft runs in
rolling element bearings (9 and 10), which are supported by a bearing bracket (5)
linked with the pump casing and/or casing cover.
Sealing
The pump is sealed by a shaft seal (standardised mechanical seal or gland packing).
