ENERGY SAVING BELTS / REDUCED ROLLING RESISTANCE

ENERGY SAVING CONVEYOR BELTS

A conveyor belt is deformed when running over the idlers. This internal friction - or asymmetrical tension between idler and conveyor belt -consumes energy.
Special rubber compounds and belt designs - for instance an additional transverse reinforcement - reduce the indentation and let the belt run easier over the idlers.
Such belt types, on long distance conveyors, can save a lot of money.
They are marketed as LRR, XLL or EOB conveyor belts.

For the determination of the energy saving properties of a conveyor belt, a standardized test described in DIN 22123 has been implemented.
The test parameters - temperature, idler diameter, pressure - can be adjusted.

ITA test rig at ITA Hannover

 

The illustration shows the motion resistances on a 1 km long horizontal conveyor as found by Hintz. The indentation rolling resistance of the conveyor belt, >60%, has by far the highest share.

Running resistances

Findings can be translated into FEA programmes.

Indentation FEA
Belt bulge on idler

POWER CONSUMPTION COMPARISON

 

 

Horizontal conveyor

 

10 % inclined conveyor

 

10 % declined conveyor

 

 

  8 %

 

23 %

 

23 %

Difference

f = 0.020

 

147 kW

 

449 kW

 

-127 kW

f = 0.015

 

110 kW

 

412 kW

 

-157 kW

 

 

37 kW

 

37 kW

 

30 kW

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