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 EOB, XLL or LRR conveyor belts.

For the determination of the energy saving properties of a conveyor belt, a standardized test has been implemented at the ITA, University Hanover.

The test parameters - temperature, idler diameter, pressure - can be adjusted.

The animation on top of this site and the illustration on the right side show the principle.

 

The indentation rolling resistance is standardized in DIN 22123.

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
Indentation FEA
Belt bulge on idler

Findings can be

translated into

FEA programmes.

POWER CONSUMPTION COMPARISON

 

 

  8 %

 

23 %

 

23 %

Difference

 

 

Horizontal conveyor

 

10 % inclined conveyor

 

10 % declined conveyor

f = 0.020

 

147 kW

 

449 kW

 

-127 kW

f = 0.015

 

110 kW

 

412 kW

 

-157 kW

 

 

37 kW

 

37 kW

 

30 kW