Abstract
© The Author(s), under exclusive licence to Shiraz University 2025.The non-circular gear pair is designed to transmit motion at various speeds in a mechanical transmission system. The vibration characteristics significantly affect the performance and service life of the meshing gear pair. However, the vibration characteristics of non-circular gear pairs have not been extensively studied. Therefore, this study proposes an experimental investigation into the vibration response of a non-circular gear pair under different surface qualities, gear loading conditions, and rotation speeds. First, the tooth profile of a non-circular gear is designed using the proposed mathematical model and manufactured via CNC (computer numerical control) wire-cutting EDM (electrical discharge machining) with three machining parameters to produce three tooth profile quality levels: rough, semi-finished, and finished. The normal tooth profile error of the non-circular gear pair is calculated to verify the surface quality of the manufactured gear. The results show that the tooth profile error is within the allowable limits of gear manufacturing standards. An experimental device is then developed to simulate the operating conditions of a non-circular gear pair, including gear loading and rotation speed. The radial vibration of the gearbox system is measured using a vibration hub system and analyzed using the Mean Lab software to evaluate the variation in system vibration. The result indicates the influence of radial vibration on tooth surface quality, rotation speed, and gear loading.
NETL
NSTL
Springer Nature