پذیرفته شده برای ارائه شفاهی

کد مقاله : 1084-ISAV (R1)

¹Acoustics Research Lab., Mechanical Engineering Department, Amirkabir University of Tevhnology

²Mechanical Engineering Department; Amirkabir University of Technology

³Acoustics Research Lab., Mechanical Engineering Department, Amirkabir University of Technology

The wear fault is a common fault in mating gears, which can be observed on tooth flanks because of insufficient lubrication and long-period operation. This fault causes deviations in gear tooth profile. As a result, the Time Varying Mesh Stiffness (TVMS) and Geometric Transmission Error (GTE) gears in mesh will be affected which manifest in the dynamic response of a gear transmission system. This study considers a uniform wear fault in a helical gear pair, which is modelled by Archard’s method. Then, a 12 DoF dynamic model is employed to evaluate the dynamic response of gears in the presence of tooth profile deviations due to wear. In this regard, the TVMS of helical gears are computed by the thin-slice method, and then the differential equations are solved by the oft-used Newmark method. Finally, the effects of wear fault in the meshing frequency amplitude and its harmonics and some Time Synchronous Average (TSA) based features are appraised.

Wear Fault؛ Helical Gear؛ Dynamic Modelling؛ TSA-based features؛ Fault diagnosis

Monitoring and diagnostics of rotating machinery