Zhang Weiliang
Institute of Mechanical Engineering, Baoji University of Arts and Sciences, Baoji, 721016, China.
Sci Rep. 2024 Mar 7;14(1):5584. doi: 10.1038/s41598-024-56411-9.
In order to realize the lightweight design of the transmission system, the braided composite material is applied to the two-stage gear transmission system. According to the structural characteristics of the two-stage gear reducer box, the whole box is designed to be assembled with the braided base and the box wall. Woven composite materials are applied to the web parts of mixed metal composite gears to realize the design goal of lightweight gears. Then, under the assumption of ignoring the influence of friction, bearings and other factors on the system, the dynamic model of the two-stage gear transmission system considering the box is established. By normalizing and dimensionless processing of the equations, the dimensionless differential equations of motion are obtained. The fourth-order Runge-Kutta method is used to analyze the relationship between the connection parameters and the dynamic characteristics of the system under the two working conditions of rigid and flexible connection between the composite base and the box wall.Through the analytical analysis of vibration displacement of two-stage gear reducer and box, the theoretical basis is found for the numerical analysis results. Finally, the dynamic characteristics of the transmission system are studied by vibration resonance analysis through high and low frequency interference. It is found that in a certain frequency range, with the decrease of the mass and moment of inertia of the transmission parts corresponding to the mixed metal composite gear, the amplitude-frequency characteristic Q of the lightweight gear and gearbox transmission system is slightly lower than that of the common gear and gearbox system, and the stability of the system is increased, and the dynamic characteristics of the system are improved.
为实现传动系统的轻量化设计，将编织复合材料应用于两级齿轮传动系统。根据两级齿轮减速器箱体的结构特点，将整个箱体设计为由编织基体与箱壁组装而成。将编织复合材料应用于混合金属复合齿轮的腹板部分，以实现齿轮轻量化的设计目标。然后，在忽略摩擦、轴承等因素对系统影响的假设下，建立了考虑箱体的两级齿轮传动系统动力学模型。通过对方程进行归一化和无量纲处理，得到无量纲运动微分方程。采用四阶龙格 - 库塔法分析了复合基体与箱壁刚性和柔性连接两种工况下连接参数与系统动态特性的关系。通过对两级齿轮减速器和箱体振动位移的解析分析，为数值分析结果找到了理论依据。最后，通过高低频干扰振动共振分析研究了传动系统的动态特性。研究发现，在一定频率范围内，随着混合金属复合齿轮对应传动部件质量和转动惯量的减小，轻量化齿轮和齿轮箱传动系统的幅频特性Q略低于普通齿轮和齿轮箱系统，系统稳定性提高，系统动态特性得到改善。
