4.5
Configuration and function
1
2
3
4
5
6
7
11
10
9
8
12
Fig. 5: Sectional drawing of Etaseco
1
Impeller
2
Bore
3
Plain bearing (impeller-end)
4
Can
5
Support sleeve
6
Plain bearing (motor-end)
7
Terminal box
8
Bore
9
Shaft
10
Rotor
11
Stator
12
Free cable end
The hydraulic system and the motor are firmly connected and form a close-coupled
unit.
Both impeller (1) and rotor (10) are arranged on a common shaft (9).
The shaft runs in product-lubricated plain bearings (3/6). The rotor space is sealed off
towards the stator space by the can (4). The can, made of corrosion-resistant
material, rests on the stator (11) and the support sleeves (5) to compensate the forces
resulting from the pressure within the rotor space.
The bearings are lubricated by the fluid in the rotor space. When the pump is started
up, the fluid enters the rotor space through the bores (2, 8) and vents the rotor space
through a bore in the shaft. The partial flow tapped from the product flow through
the bores (2 and 8) surrounds the rotor during pump operation and enters an axial
bore provided at the rear end of the rotor shaft. The axial bore leads to the front
face of the impeller-side shaft end.
The pressure difference between the bores (2 and 8) and the outlet of the axial bore
through the shaft at the impeller-side shaft end results in a continuous partial flow
of fluid handled. As this partial flow passes through the circular clearance between
the rotor and the can, it dissipates the heat losses generated in the motor. The
intensive exchange of fluid from the hydraulic space to the rotor space and back to
the suction side of the hydraulic system also ensures sufficient lubrication of the plain
bearings.
Depending on the pump model, the pump set is connected to the power supply
either via the terminal box (7) or the free cable end (12), which is firmly connected to
the motor. Depending on the technical version, additional equipment such as
temperature sensors for monitoring the rotor space temperature (PT-100) can be
provided in the motor.
Design
Function
4 Description of the Pump (Set)
16 of 60
Etaseco/Etaseco I
Summary of Contents for Etaseco C
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