Hich pressure technology can also be found in the metal industry. AAP in close collaborarion with URACA has taken part in some projects for this industry in Spain from descaling to hydrodynamic lubrication. Examples are CELSA (Compañía Española de Laminación), CAF (Construcciones y Auxiliar de Ferrocarriles), Arcelor Mittal, etc. The most common applications of high pressure plunger pumps in the metal industry are:
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Descaling
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New casting and production technologies
are making it possible to
cast and roll steel to the required
thickness extremely effectively.
High surface purity is essential
during the rolling operation if high
product quality is to be achieved.
The scale that forms on the surface
therefore has to be removed.
The hydrodynamic descaling process
at pressures of 120 – 400 bar is a
reliable way to remove this scale
and to guarantee the high quality
required for further processing.
Descaling recycle water is very
demanding on both material
and equipment design. URACA
pumps have proved to
be an ideal choice
as pressure
generators in
this application
area: they have a
track record of long
service lives in extreme
conditions.
In addition to individual pumps,
URACA also supplies complete
descaling systems – from the filter
to the pressure generator and the
nozzle beam.
URACA is just as experienced in
supplying you with new equipment
as it is in modifying and retrofitting
your existing descaling systems.
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Press drives
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Large extrusion or forging presses
are driven hydraulically. In view
of the different technological and
design constraints, high-pressure
plunger pumps are ideally used for
this application.
URACA pumps transport emulsions
or clean water from the feed tanks
to the high-pressure accumulators.
When systems are being configured,
close attention is paid to
the problems posed by the need
to avoid cavitation, erosion and
vibration, so that long service lives
can be reached with the pump equipment.
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MORGOIL roller journal bearings
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MORGOIL roller journal bearings
are self-contained plain bearings.
They are used to support loadbearing
rollers in rolling mills producing
either steel or non-ferrous
metals.
These roller journal bearings are
constantly subjected to the effects
of large rolling forces at high
and low speeds, heat, dirt, scale
and roller cooling agents.
The design and method of operation
of the bearings are based
on the principles of hydrodynamic
lubrication. Advantage is taken of
the high loadbearing capacity of an
uninterrupted film of oil that
makes sure there is no metal to
metal contact between the surfaces
of the bearings. An oil circulation
system is responsible for the hydrodynamic
lubrication.
Rolling mills with MORGOIL roller
journal bearings also have to
cope with high stresses in critical
speed ranges requiring a hydrostatic
lubrication system in addition
to the hydrodynamic system.
A URACA high-pressure plunger
pump maintains the balance needed
in accordance with the relevant
strain on the bearings when the
rollers are operating at low speed
or have stopped. Depending on
the application concerned, the
pump can reach pressures of up to
1450 bar.
The outstanding features of
URACA pumps are reliability and sturdiness.
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