采煤机牵引部两级行星齿轮传动系统刚柔耦合动力学分析

Analysis for Two-Stage Planetary Gear Transmission System of the Shearer Haulage Unit Based on the Rigid-flexible Coupling Dynamics

摘要: 为了研究采煤机牵引部两级行星齿轮传动系统的动态啮合特性以及行星架的受力情况，以刚柔耦合多体动力学理论为基础，运用ANSYS和ADAMS软件建立了两级行星齿轮系统的刚柔耦合动力学模型。根据Hertz接触理论对刚柔耦合模型进行动力学仿真分析。仿真结果表明：行星齿轮啮合力在时域上存在周期性冲击且振动幅值存在明显的调制现象；啮合力的响应频率成分由齿轮啮合频率、齿轮转频和啮合频率倍频两侧以其转频为间隔对称的调制频率带组成；两级行星架都在行星轮轴孔处以及行星架输出轴的根部处存在应力集中，此处为行星架的薄弱位置。仿真结果得到了两级行星齿轮系统各级齿轮啮合特性而且为二级行星架损坏机理及疲劳性能研究提供了依据。

Abstract: In order to study the driving characteristics of the two-stage planetary gear of the shearer haulage unit and the force of the planet carrier, based on the rigid-flexible coupled multi-body dynamics theory, ANSYS and ADAMS software were used to establish the two-stage planetary gear transmis-sion system rigid-flexible coupling dynamics model. Dynamics simulation of the two-stage planetary gear is carried out based on the Hertz contact theory. The simulation results show that the meshing force of the planetary gear has periodic impact in the time domain and the vibration amplitude has obvious modulation. The response frequency component of the meshing force is composed of a symmetry modulation frequency at which the gear meshing frequency, the gear rotation frequency, and the meshing frequency multiplier are separated by an interval frequency. The stress of the two-stage planet carrier concentrates on the shaft hole of the planet shaft and the root of the output end of the carrier, which is the weak position of the planet carrier. The simulation results not only demonstrate the meshing transmission characteristics of planetary gear are validated but also provide the guidance for studying damage mechanism and fatigue property of the secondary planet carrier.