Mismatched, Worn, or Stretched Belts
Mismatched, worn, or stretched belts, especially Vee belts, will generate vibration at the fundamental belt pass frequency and harmonics of it. Usually the second harmonic is dominant if there are two sheaves in the system. The fundamental belt frequency FBF is given by the following formula. It is always sub-synchronous, meaning it is lower in frequency than 1X.
Where D = Sheave Diameter
L = Belt Length
RPM = Turn speed of sheave D
DLI Engineering provides products and services for Predictive Maintenance including vibration analysis instruments, monitoring and diagnostic software, and consulting for CBM programs.
© 2008 DLI Engineering Corporation - All rights reserved.