Big Joe Turner was first to record the rock and roll hit “Shake, Rattle and Roll,” but Bill Haley and His Comets later sang it more successfully. Since the chart topping success way back in 1954 nothing else has been able to compare to the shake, rattle and roll like wing style conveyor pulleys. Just like your dad, neighbors are pleading with quarry operators to “turn that racket down!”
What causes the uproar? Traditional wing pulleys are not designed with enough surface area to contact the belt. This cause a bouncing belt effect. The more bounce, the higher levels of noise and vibration generated by the wing pulley and belting.
In 2007, we developed the Chevron® Wing Pulley. While testing revealed the v-shape pulley deflects material from catching between the wings, our engineers had to listen carefully for a surprise benefit. Armed with their trusty sound meter, the new pulley design was only recording 50 decibels of sound. Meanwhile, traditional wing pulleys were blasting up to 120 decibels — equal to noise generated by a jet engine!
It turns out the v-shape design increases the surface area the belt contacts. The belt is essentially rolling around a circle (much like a drum pulley, but with the benefits of a wing), which significantly reduces any beating action. On the other hand, a standard wing pulley is “apexed” or shaped as a many-sided polygon. So the belt is always raising and lowering over one or two wings as the pulley goes round, which causes the belt to flap and results in more belt wear, and much more vibration and noise. (See image below).
Excess vibration is one of the largest causes to premature failure of bearings, drives, couplings, belt splices, motors and structural steel. Removal of this root cause of vibration not only reduces the ambient noise but increases life of the total system ensuring lower total cost of ownership.