联合驱动斜齿轮传动系统模式切换过程的动态特性分析

Dynamic Characteristics Analysis of Mode Switching Process in Combined Helical Gear Transmission System

齿轮传动系统作为舰船推进装置的重要组成部分,其在舰船运行模式切换过程中能否保持良好的动态特性对舰船结构安全性及机动性有着重要的影响。本文以某舰船中柴燃联合驱动斜齿轮传动系统为研究对象,建立系统纯扭动力学模型,采用MASTA软件验证该模型的正确性,基于该模型对燃气轮机单机驱动向柴燃联合驱动模式切换时的动力学特性进行分析,寻找模式切换的最佳转速和输入扭矩,探究啮合刚度和双联轴扭转刚度对模式切换过程动态特性的影响。计算结果表明,模式切换时齿轮1的最佳转速为2250 r/min,齿轮7的最佳输入扭矩为3100 Nm;啮合刚度的增大范围在基础值的1~1.2倍时,可以减弱不同切换阶段各齿轮副的振动程度;只要保证双联轴的扭转刚度超过0.8倍的基础值,系统中各齿轮副的振动程度将不再发生明显变化。

As an important part of the propulsion device,the gear transmission system can still maintain good dynamic characteristics in the mode switching process,which has an important influence on the safety and maneuverability of the ship structure.In this paper,the combined drive helical gear transmission system of a ship is taken as the research object,the pure torsional dynamic model of the system is established,and the MASTA software is used to verify the correctness of the model.Based on the model,the dynamic characteristics of mode switching process between single drive mode and combined drive mode were analyzed.And the model is used to find the optimal speed and input torque of the mode switching,and the influence of the meshing stiffness and the torsional stiffness of the shaft on the mode switching process is explored.The results show that the optimum speed of gear 1 is 2250 r/min,and the optimum input torque of gear 7 is 3100 Nm.When the meshing stiffness increases 1~1.2 times,the vibration of each gear pair can be reduced at different switching stages.As long as the torsional stiffness of the shaft is more than 0.8 times of the base torsional stiffness,the vibration degree of each gear pair in the system will not change significantly.