Advantages of garlands

Advantages of garlands

The garland idlers have numerous significant advantages compared to the idlers with rigid frames. The most important advantages of garlands result from their properties:

Characteristics of garland idlersThe resulting advantages
Possibility of quick and uncomplicated lowering of individual garlands during operation (see quick lowering eyes). This is necessary e.g. if a defect is detected on one of the rollers of the garland (e.g. in the case of hot rollers). 
  • Avoidance of unplanned downtimes --> Higher efficiency of the conveyor system
  • Reduced risk of belt damage (staff can react immediately if a defect is detected)
Adaptive geometry of the garland idlers
  • Reduced risk of belt misalignment and spillage when bulk material is fed off-center
  • Damping of dynamic loads (impacts from lumps and coarse-grained bulk goods) --> Longer conveyor roller service life and reduced loads on steel structures
  • Better suited for movable belt conveyors 
No need to lift the belt to replace the conveyor rollers
  • Short time for garland change (also in the feed area) of approx. 5-10 minutes per garland --> Higher efficiency of the conveyor system
Usually no idler frames (steel frames to hold the conveyor rollers) necessary, simpler geometry of conveyor steel structures
  • No wear of the conveyor rollers due to accumulation of bulk material on the surfaces of the idler frames
  • Lightweight constructions --> cost and weight savings
  • Efficient installation of additional suspensions or buffers possible (see "Impact garlands" and "Intelligent garland").

However, there are of course also certain disadvantages respectively limits of the meaningful application of garland idlers.

For example, if the conveyor is inclined (e.g. with vertical curves), the garlands can lead to increased running resistance and wear. For this reason, the garlands should not be installed in such sections of the belt conveyor, respectively not without appropriate countermeasures.

The use of garland idlers is also less worthwhile for smaller belt widths: additional tools would be required to change the garlands, while the insert rollers are still relatively manageable in size and weight and can therefore usually be changed with relatively little effort.

 

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