4.6
Configuration and function
1
3
4
6
7
8
9
10
5
2
Fig. 3: Sectional drawing
1
Casing wear ring
2
Discharge nozzle
3
Discharge cover
4
Shaft
5
Bearing bracket
6
Suction nozzle
7
Impeller
8
Shaft seal
9
Bearing, pump end
10
Bearing, motor end
The pump is designed with an axial fluid inlet and a radial outlet. The hydraulic
system sits on the extended motor shaft. The shaft runs in common bearings.
The fluid enters the pump axially via a suction nozzle (6) and is accelerated outward
in a cylindrical flow 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 casing wear ring
(1) prevents any fluid from flowing back from the casing into the inlet. At the rear
side of the impeller, the shaft (4) enters the casing via the discharge cover (3). The
shaft passage through the discharge cover is sealed towards the 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 discharge
cover.
The pump is sealed by two bi-rotational mechanical seals in tandem arrangement.
A lubricant reservoir in-between the seals ensures cooling and lubrication of the
mechanical seals.
4.7
Scope of supply
Depending on the model, the following items are included in the scope of supply:
Stationary wet installation (installation types S)
▪
Pump set complete with power cables
▪
Claw with sealing material and mounting elements
▪
Lifting rope or chain
▪
Mounting bracket with mounting elements
Design
Function
Sealing
4 Description of the Pump (Set)
18 of 78
Amarex KRT
Содержание Amarex KRT
Страница 77: ......