节点外啮合行星轮系耦合动力学分析及试验验证

发布时间：2018-01-10 04:17

本文关键词：节点外啮合行星轮系耦合动力学分析及试验验证　出处：《南京航空航天大学》2016年硕士论文　论文类型：学位论文

【摘要】：行星齿轮传动系统利用多个行星轮有效实现了功率分流,同时输入、输出轴同轴,因此与定轴轮系相比,具有传动比大、承载能力强、传动效率高等优点,在工业领域的多个行业内有着广泛应用。节点外啮合齿轮传动相比于普通齿轮传动,由于实际啮合线位于节点一侧,避免了啮合过程中齿面摩擦力换向引起的冲击振动,可以改善系统的振动特性。为了更全面地了解节点外啮合行星轮系的动态特性,本文围绕其耦合动力学特性开展了以下研究工作:(1)以向心球轴承为研究对象,论述了基于Hertz接触理论的滚动轴承载荷与径向变形的关系,由此得到了轴承时变支承刚度的计算式。基于ANSYS Workbench对向心球轴承进行了接触仿真,并将有限元仿真解与理论分析解进行了对比。(2)根据时变支承刚度建立了齿轮-轴承耦合关系,进而采用集中参数法建立了更为完善的节点外啮合行星齿轮传动系统动力学模型,分析了齿轮副啮合刚度、阻尼,构件扭转刚度、阻尼,齿面摩擦力的计算。根据牛顿运动定律推导了系统动力学微分方程组并探讨了微分方程的解法。(3)利用Rung-Kutta数值积分法求解系统动力学方程,得到了轴承时变支承刚度和系统动力学响应,研究了时变支承刚度对系统振动特性的影响规律。基于ADAMS软件对系统进行了运动仿真,直观地掌握了系统运转特性。(4)利用1000kW机械功率封闭试验台开展了验证试验,制订了试验方案,测量得到了不同工况条件下的振动信号。基于小波变换对试验信号进行时频分析,得到了去噪信号,进而验证了理论分析解的正确性。
[Abstract]:Planetary gear transmission system using a plurality of planetary gear effectively realizes the power split, at the same time, input, output shaft coaxial, so compared with the fixed axis gear train has large transmission ratio, strong carrying capacity, high transmission efficiency advantages, a number of industries in the industrial field has wide application. The node external gearing compared to ordinary gear transmission, due to the actual meshing line on one side of the joints, to avoid impact vibration during the meshing gear tooth friction force commutation, the vibration characteristics of the system can be improved. In order to fully understand the dynamic characteristics of node external gearing planetary gear train, this paper carried out the following research work focuses on the coupling dynamics: (1) the ball bearing as the research object, discusses the contact relationship between the load bearing and the radial deformation based on the theory of Hertz, which has been bearing time-varying stiffness calculation. Based on ANSYS W Orkbench simulation of contact ball bearings, and finite element simulation solutions were compared with the theoretical analysis. (2) according to the time-varying stiffness of gear was built - bearing coupling relationship, and establish a more dynamic node external gearing planetary gear transmission system model improved by lumped parameter method of meshing gear the stiffness, damping analysis, damping stiffness, torsional component, calculation of gear tooth friction force. According to Newton's law of motion of the system is deduced dynamic differential equations and discusses the solution of the differential equation. (3) using Rung-Kutta numerical integration method to solve the dynamic equations of the system, the bearing support stiffness and dynamic response variable system of time varying stiffness influence on the vibration characteristics of the system. ADAMS software system based on motion simulation, intuitively grasp the running characteristic of the system. (4) by 1000kW The verification test is carried out for the mechanical power closed test rig, and the test scheme is worked out. The vibration signals under different working conditions are measured. The time-frequency analysis of the test signal is achieved based on wavelet transform, and the denoising signal is obtained, which further verifies the correctness of the theoretical analysis.

【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH132.41

【参考文献】