Product category:
Industrial Motors
News Release from: SSD Parvex | Subject: Torque motors for extruders
Edited by the Engineeringtalk Editorial
Team on 27 November 2007
Torque motors are made for extruders
Torque motors for extruders integrate dedicated features that have been especially designed to respond to the specific needs of the plastics and rubber industries.
SSD Parvex has a new torque motor range, especially designed to replace traditional gearbox-based systems on extruder applications up to 320kW Today, most extruders still rely on traditional AC or DC motors associated with gearboxes to rotate the extrusion screw with the required speed and torque characteristics
Unfortunately, those mechanical transmission systems not only happen to be bulky and noisy, but they also represent important installation, operation and maintenance costs.
Now, with Parker torque motors for extruders, a dedicated "direct drive" solution is available, dramatically cutting machines costs of operation.
More than just motors, Parker torque motors for extruders integrate dedicated features that have been especially designed to fully and effectively respond to plastics and rubber industries specific needs.
Equipped with a customisable mechanical interface and a generously sised thrust bearing to support back pressure from the screw, Parker torque motors for extruders can easily be set in place of existing gearbox-based systems.
Thanks to this complete and ready to use direct drive solution, no more time is spent in assembling and aligning different elements (gearbox, belts and pulley, motor etc).
Installation times now become a matter of hours, instead of days with traditional systems.
Based on brushless technology, Parker torque motors for extruders contain no moving parts subject to wear, making the maintenance of the motor itself almost inexistent.
Downtimes for DC motor revision or gearbox draining, as well as production losses caused by mechanical failures, are a thing of the past.
Easier to install and to maintain, Parker torque motors for extruders are also more efficient than gearbox based systems, the difference being primarily due to the removal of the power losses in the mechanical transmission.
Roughly estimated, the efficiency of Parker torque motors can be considered as 5 to 10 points higher compared with gearbox based systems, allowing to make significant energy savings.
For example, in the case of a 110kW extruder working 7200 hours per year, this represents a global annual energy saving of Eur 4000 to 7900 (based on an energy cost of Eur 0.10/kWh).
Rotors fitted with powerful rare-earth permanent magnets provide Parker torque motors with very high torque densities compared with traditional systems, allowing considerable space savings.
Also very quiet, Parker Torque Motors noise levels are well below the 80dB(A) limit set by the new 2003/EC/10 European Directive.
Delivering torques up to 22kNm, at speeds ranging from 50 to 600rev/min, Parker torque motors represent the perfect alternative to gearbox based systems, for mono screw extruders applications of power up to 320kW.
Those motors deliver their full performances in association with Parker AC890 universal system drives family, that run induction motors, torque motors and permanent magnet servomotors in control modes from simple volts/hertz to precision closed loop vector with positioning.
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