An improved dynamic model of spur gear transmission considering coupling effect between gear neighboring teeth

Gear tooth profile deviations are usually inevitable due to the application of intentional tooth profile modification, the existence of undesired gear manufacturing errors and the tooth surface defects during operation, and they have been demonstrated to have significant effect on the vibration and noise level of gear transmissions. How to calculate the gear mesh forces accurately is crucial for gear dynamic simulation, especially in the presence of gear tooth profile deviations that will complicate the interactions at the gear mesh interface. This paper presents a spur gear dynamic model where the detailed deformations of individual teeth are considered, including the tooth flexible deformations, gear body deformations, the local teeth contact deflections, and the tooth deformations due to its neighboring loaded tooth. This dynamic model is validated by experimental test results with and without tooth tip reliefs. Then, the optimization of the tooth tip relief is performed. Finally, it is compared with three traditional dynamic models to reveal their discrepancies and applicability which could supply theoretical guidance for selection of gear dynamic models.

Automated summary

This study investigates the impact of gear tooth profile deviations on gear transmissions and how to accurately calculate gear mesh forces. A dynamic model for spur gears considering detailed deformations of individual teeth is proposed, validated, and optimized. Comparison with traditional models offers theoretical guidance for selecting gear dynamic models.