KSB MK, Инструкция по установке и эксплуатации

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4 Description of the Pump (Set)
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MK
MKY
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Fig. 4: MKY
1 Discharge pipe 2 Bearing bush
3 Volute casing 4 Motor
5 Radial ball bearing 6 Thrust and radial bearing
7 Shaft coupling 8 Drive lantern
9 Shaft seal 10 Shaft
11 Support column 12 Overflow opening
13 Radial bearing 14 Impeller
15 Clearance gap
Design The vertical non-self-priming submerged pump in single-stage, single-entry design
features an axial fluid inlet and a radial fluid outlet.
Above the drive lantern the rotor is axially and radially supported by a radial ball
bearing which is greased for life; at the impeller end, it is radially supported by a
product-lubricated bearing bush. It is connected to the motor by a rigid coupling
sleeve. Various installation depths can be accommodated by up to three support
column sets and matching incremental lengths of the shaft assembly. The pump set is
installed in a drive lantern. The discharge nozzle of the volute casing is connected to
the lantern via a discharge pipe. The discharge pipe ends in a flanged bend.
Function The uniformly rotating impeller of the submerged pump transfers mechanical energy
to the fluid passing through. The fluid enters the pump vertically via the suction
nozzle and is accelerated outward by the rotating impeller. In the flow passage of
the volute casing the kinetic energy of the fluid handled is converted into pressure
energy. The fluid leaves the pump via the discharge nozzle. The clearance gap
minimises the fluid flowing back from the volute casing into the suction nozzle. On
the rear side of the impeller, the hydraulic system extends up to the radial bearing
with bearing bush. The shaft passes through the radial bearing.
Sealing The pump set is sealed towards the fixed bearing with a shaft seal (gland packing).