Gear Loose Fit Problem For Vibration Analysis Diagnostics
A loose fit problem in a gear train is not in fact a gear
fault, but operation of a gearbox with condition can cause
gear damage.
Excessive clearances in bearings supporting the gear shafts
themselves can cause the looseness. Or can also be caused
from loss of press fits or loose keyways locking the gear
hub to the shaft.
Mechanical looseness type C response with
increased running speed harmonics and raised noise floor
is what usually indicates by vibration spectrum, but the
gear mesh frequency harmonics are also affected. Increased
amplitudes of GMF harmonics and amplitude trends that increase
with higher GMF orders is the result.
