Investigation of the Vibration Features and Dynamic Load Sharing Characteristics of Concentric Face Gear Torque Split Transmission
Investigation of the Vibration Features and Dynamic Load Sharing Characteristics of Concentric Face Gear Torque Split Transmission
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DOI：
10.1115/1.4051053
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发表时间：
2021-07-01
影响因子：
2
通讯作者：
Chen, Siyu
中科院分区：
文献类型：
--
作者：
Dong, Jianxiong;Hu, Zehua;Chen, Siyu
介绍了一种用于直升机主传动系统的同心面齿轮转矩分配系统，以实现更大的功率传递和减轻结构重量。建立了转矩分流系统的振动特性和均载性能的数学模型。模型中考虑了啮合刚度、齿侧间隙、静态传动误差和系统工作转矩等激励。基于数值分析结果，研究了该体系的振动特性、动力位移响应以及影响体系均载能力的体系因素。结果表明，该系统的振动形式可分为三类：小齿轮振动模态、面齿轮振动模态和小齿轮耦合面齿轮振动模态。在转速5772 rpm和10,250 rpm附近检测到共振峰和跳跃现象，主要与面齿轮的旋-轴耦合振动模态有关。此外，适当的齿侧间隙和小齿轮分布角参数对提高动态均载能力具有重要意义。小齿轮轴承支承刚度的增加会使小齿轮的均载特性变差，建议采用相对柔性的小齿轮轴承支承。
A concentric face gear torque split system used in the helicopter main transmission to transfer more power and reduce the structure weight is introduced. A mathematical model is proposed to analyze the vibration characteristics as well as load sharing performances of the torque split system. The excitations including mesh stiffness, backlash, static transmission error, and system work torque are considered in the model. The vibration property, dynamic displacement responses, and the system factors which affect the load sharing capacity of the system are studied based on the numerical analysis results. The results show that vibration forms of the system can be classified into three categories: pinion vibration mode, face gear vibration mode, and pinion coupled face gear mode. Resonance peaks and jump phenomena are detected around rotation speed 5772 rpm and 10,250 rpm, mainly related to the coupled translational-rotational-axial of face gears vibration modes. In addition, appropriate gear pair backlash and pinion distribution angle parameters are significant to improve the dynamic load sharing capacity. The increase of the pinion bearings' supporting stiffness will generate worse load sharing characteristics and a relative flexible bearing is recommended to the pinions' supporting.