Detecting Cracks in Gears with Hybrid Wavelets

10.6567/IFToMM.14TH.WC.OS19.016

Ales Belsak；Jurij Prezelj

Gear ； Crack ； Vibration ； Signal analysis

Proceedings of the 14th IFToMM World Congress

14th-6（2015 / 11 / 11）

20 - 24

英文

Problems and faults in gear unit operation are caused by different damages; a crack in the tooth root, which often results in gear unit operation failure, is probably the least desirable among them. Signals produced by a faultless gear and by a gear with a crack in the tooth root, caused in real operating conditions, are used for fault detection analyses and methods. A test plant was used to measure these signals. The presence of a crack can be determined by monitoring vibrations. The impacts that a crack in a single-stage gear unit has on vibrations are dealt with. A fatigue crack in the tooth root brings about significant changes in tooth stiffness. Changes of other dynamic parameters are more associated with other faults. To analyze a non-stationary signal, time frequency analysis tools, such as wavelets analysis, were used.