Vibration characteristics analysis of face gear transmission system considering gyroscopic effect

Xiaozhen Li,Kuo Su,Tongjie Li,Liyong Zhang

doi:10.21595/jve.2022.22289

Abstract

To improve the dynamics of the face gear transmission system, a nonlinear dynamics model considering gyroscopic effects and including parameters such as time-varying meshing stiffness, meshing damping, tooth side clearance, support stiffness and damping is developed. The Runge-Kutta method was used to solve the nonlinear kinetic equations and analyze the accuracy and reasonableness of the model calculation results. The vibration displacement, vibration velocity and vibration acceleration along each direction of the face gear and straight cylindrical gear were analyzed, and the torsional vibration characteristics of the center of mass of the two gears were studied.

Highlights

When the axis intersection angle γ 90 °, the bevel gear teeth will be distributed in a circular plane, the bevel gear is the face gear, and generally known as the face gear transmission
In the ART program jointly carried out by the US. military and NASA in the 1990s, a new helicopter main gear using face gears for split-torsion transmission was designed, and face gears were used as the mechanism for split-torsion transmission in the main gear [6]
The face gears studied in this paper are orthogonal face gears, and the face gears mentioned below all refer to orthogonal face gears

Summary

Introduction

Face gears have the advantages of low vibration, low noise, high load-bearing capacity and simple structure [1-5]. Compared with the traditional helicopter main gear using bevel gear as the split-torsion transmission mechanism, the split-torsion transmission mechanism with face gear has a simple support structure and a weight reduction of about 40 %, and its power shunting effect is better, with less vibration and lower noise, which has obvious advantages over the bevel gear split-torsion transmission. VIBRATION CHARACTERISTICS ANALYSIS OF FACE GEAR TRANSMISSION SYSTEM CONSIDERING GYROSCOPIC EFFECT. The dynamics of the face gear transmission system is modeled considering the gyroscopic effect. The gyroscopic effect is a physical phenomenon that occurs when the orientation of the symmetry axis of the rotor changes in high-speed rotating machinery. The face gears studied in this paper are orthogonal face gears, and the face gears mentioned below all refer to orthogonal face gears

System dynamics modeling

Calculation of F⃑n, M⃑n1 and M⃑n2

System dynamics analysis

Findings

Conclusions