KSB Etachrom NC, Инструкция по установке и эксплуатации

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4.6 Configuration and function
1 2 5 4 3
6
7
10
9
8
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, drive end
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.
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 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 casing cover.
The pump is sealed by a standardised mechanical seal.
4.7 Noise characteristics
Table 6: Surface sound pressure level L
pA
2)3)
Rated power
input P
N
[kW]
Pump Pump set
1450 rpm
[dB]
2900 rpm
[dB]
1450 rpm
[dB]
2900 rpm
[dB]
0.55 47 48 51 57
0.75 48 50 53 58
1.1 50 52 55 61
1.5 52 54 57 62
2.2 54 56 59 65
3 55 57 60 66
Design
Function
Sealing
2) Spatial average; as per ISO 3744 and EN 12639; valid for operating range Q/Qopt = 0.80 - 1.1 and non-cavitating pump
operation. If noise levels are to be warranted: Add +3 dB for measuring and constructional tolerance.
3) Increase for 60 Hz operation: 3500 rpm +3 dB; 1750 rpm +1 dB
4 Description of the Pump (Set)
18 of 62 Etachrom NC