KSB Etanorm FXV, Инструкция по установке и эксплуатации

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4 Description of the Pump (Set)
16 of 62
Etanorm FXV
1311.83/06-EN
4.6 Configuration and function
1
6
7 8
9
10
2 3 4 5
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 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).
4.7 Noise characteristics
Table 5: Surface sound pressure level L
pA
3)
Rated power input P
N
[kW]
Pump Pump set
1450 rpm
[dB]
2900 rpm
[dB]
1450 rpm
[dB]
2900 rpm
[dB]
15 64 66 67 74
18,5 65 67 68 75
22 66 68 69 76
3
Surface sound pressure level as per ISO 3744 and DIN EN ISO 20361 ; valid for a pump operating range of Q/
QBEP = 0.8 - 1.1 and non-cavitating operation. If noise levels are to be guaranteed: Add +3 dB for measuring
and constructional tolerance.