Good to know
Starting in 2010 the BEHAbelt Newsletter and website take on technical topics in the "Things you should know" section. Here we discuss topics that you may run into on your day- to- day routine at work or with a client. Our first topic of the year is Pulley Diameter.
1. "How does the pulley diameter impact the conveyor belt?"
- In general, the pulley diameter has a remarkable effect on the durability of the belt in use. Therefore, we recommend that you do not go below the recommended minimum pulley diameter mentioned within the BEHAbelt delivery program , instead chose a larger diameter. Undersized pulley diameters always reduce the durability of the belts because extreme flexing cycles reduce the materials quality. The mentioned min. pulley diameters always refer to an angle of grip of 180°. The flexing cycle specifies with how much degree the belt is enlacing the pulley. For more questions or comments on Pulley Diameters, contact us via the web email, or give us a call.
2. " Why do some belts "fizzle/wheeze within the application's machinery?
The phenomenon of the fizzling belts within the machinery can have different reasons. In general sounds (fizzling, permanent or discontinuous wheezing) can be effected trough friction between the pulley and the belt. This friction can be caused by failure of the drive geometry (profile shape). Moreover sounds can appear when the belt slips over the pulley when the belt tension is to low or there is a underdimensioning of the belt. When the belt tension is to low, vibrations within the empty side rope may appear and the belt will derail off the pulley.
3. "How does the belt tensioning impact the durability of the conveyor belt?”
- The quality of the conveyor belt is inevitably linked to the quality of the material and the quality of the splice because “every belt is only as good as the splice!”
- But, just as critical to the belt performance and the splice quality is the correct belt tension at the fitting within the machinery! The corresponding tensioning recommendations are listed within the BEHAbelt delivery programme.
- Also important is the material combination of the drive pulley to the deflection pulley or the belt guide.
Drive pulley -> high coefficient of friction
Deflection pulley or belt guide -> low coefficient of friction.
Too low/high tension and the results:
- Too low belt tension results in slippage of the belt and generation of excessive heat. This causes belts deforming, abrasion, breaking, and running off the pulleys.
- Too high belt tension may cause damage to pulleys, shafts and bearings. The belt permanently elongates and will prematurely fail due to material degradation and crack formation. Furthermore the belt loses his material resilience.