Abstract
To accurately predict the axial vibration displacement of herringbone gears and control their manufacturing quality. Focusing on herringbone gears for aircraft engines, this research developed a finite element method-based approach to predict axial vibration displacement accounting for alignment deviations, and subsequently measured the deviations. First, the geometric characteristics of the V-apex of the herringbone gear and its deviation were characterized using the concept of tooth flank characteristic lines and V-iron, and a mathematical model of the tooth surface including this deviation was constructed. Secondly, a geometric model and FEA model of a herringbone gear considering the V-apex deviation were established, thereby investigating the influence mechanism of this deviation on the static-dynamic behaviors of aircraft herringbone gear drive trains. Finally, methods for measuring the axial alignment deviation of the V-apexes were proposed, and the alignment deviation was evaluated with experimental verification through precision measurement tests. Research shows that: The axial alignment deviation had a direct impact on the load distribution and the axial vibration of the herringbone gear system, and the total axial alignment deviation F A = 0.0221 mm. This study furnishes systematic theoretical support for the low-vibration optimization design and processing quality control of herringbone gears used in aircraft propulsion systems.
Get full access to this article
View all access options for this article.