26
MAtErIAlS/SolIDS ProcESSIng
Planetary gearboxes: a solution
for driving peristaltic pumps
T
here are specific requirements high torque and an ability to cope with out of
In the water industry
in finding a suitable gearbox. balance radial loads is required to ensure the
peristaltic pumps are Vibration, unbalanced loading and consistent operation of such pumps, especially
preferable for many
the need for high reduction ratios those of the size used in the water industry.
applications. Jon Snaith
means that traditional transmissions are often In today’s climate, energy efficiency is also
explains.
too large, inefficient or prone to damage to of utmost importance; especially when running
function on larger pumps. A solution comes a pump continuously. Brevini’s planetary
Dans l’industrie de l’eau,
from planetary gear boxes which are low gearboxes tackle this problem providing 98 per
les pompes péristaltiques
maintenance, compact gearboxes capable of cent energy efficiency per stage.
sont préférables dans
incredibly high reduction ratios. As there are three planetary gears inside
un grand nombre The principle of the peristaltic pump is a toothed outer ring the load is spread among
d’applications. based upon alternating compression and many contact points, this leads to less point
Explications de Jon
relaxation of the inner hose via two shoes pressure and less internal friction and more
Snaith.
positioned 180° apart on a rotor. As the rotor efficiency.
turns, the tube under compression closes thus Other high reduction transmissions may
In der Wasserindustrie
forcing the fluid through the tube. have as low as 50 per cent efficiency meaning a
sind Peristaltikpumpen
Additionally, upon restitution of the hose, significant saving can be made. This efficiency
bei vielen Anwendungen
a vacuum develops which draws the fluid means that a smaller motor is required which
vorzuziehen. Mehr dazu
along the hose with no possibility of cross results in lower running costs for the pump
von Jon Snaith. contamination. These pumps are capable of overall.
pumping liquid with up to 80 per cent solid
content.
High torque
In larger pumps and other water treatment
Sterilisation of fluid
processes it is necessary to move large rotors
The pumped liquid is totally contained within at low speeds. It is therefore essential that a
the hose so does not come into contact with high torque is achieved. Brevini’s planetary
any moving parts ensuring sterilisation of the range provides torque from between 1.6 kNM to
fluid, or indeed the pump. A gearbox with 800 kNM.
Fig. 1.
Peristaltic
pumps continue
to be preferable
to water
authorities. The
introduction of
a planetary
gearbox system
such as the
range offered by
Brevini ensures
that these
pumps will run
more efficiently
with less
maintenance.
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