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19. September 2016

Longer conveying distances thanks to driven idlers

ITA | An innovative drive concept pushes previous boundaries of conveying technology: Driven idlers shall facilitate considerably longer conveying distances and larger mass flows. This novel technology is being investigated by researchers of the Institute of Transport and Automation Technology (ITA).

Belt conveyors are used for the transport of enormous quantities of ore or gravel over distances of up to 20 kilometres. Longer conveying distances can only be realized when using additional drives (see Fig. 2), e.g. drive belts or drive pulleys. However, this goes along with high investment cost or requires extra transfer points, putting more strain on the conveyor belt.
At present, researchers of the Institute of Transport and Automation Technology (ITA) of Leibniz Universität Hannover are investigating the potential of driven idlers. Belt conveying systems consist of many hundreds of idlers which bear the weight of the conveyor belt and the bulk material. The idea is that part of the idlers is driven by a motor to reach a more evenly distributed transmission of force (Fig. 2).
Provided that the use of driven idlers becomes accepted in conveying technology, this could enable transports over considerably longer distances. In this way, even upcountry pit mines could be connected economically to a port.

by Daniel Hötte

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At a glance

  • Novel drive concept for belt conveying systems
  • Motor-driven idlers shall replace central drive
  • Belt tensile forces reduced by use of driven idlers
  • Longer conveying distances and larger mass flows
ITA_Tragrollen_Bild1_Phoenix_01
Belt conveying systems for mile-long transport of gravel and ore – for example from open pit mine to port. (Source: PHOENIX)
ITA_Tragrollen_Bild2_EN
Path of belt traction force with different additional drive solutions. (Photo: ITA)
ITA_Tragrollen_Bild3_EN
Researchers are testing driven idlers on the ITA conveyor belt test rig. (Photo: ITA)
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Dipl.-Ing. Daniel Hötte

+49 (0)511-762-2547

daniel.hoette@ita.uni-hannover.de

www.ita.uni-hannover.de

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