基于虚拟样机的无返回力矩钟表机构仿真分析

Multi-Body Dynamics Simulation of Runaway Escapement Based on Virtual Prototype Technology

研究无返回力矩钟表机构计时特性问题,传统的仿真分析大多只考虑擒纵机构的参数对G摆卡子振动特性的影响,而忽略了传动机构对其的影响。为了准确预测钟表机构延期解除保险时间,提出将虚拟样机技术应用于钟表机构计时特性研究中。在UG中建立好三维装配模型,并利用Adams软件平台建立完整的无返回力矩钟表机构虚拟样机,分别对传动机构的理想状态、计及传动轴系变形以及考虑传动轮系接触碰撞三种模型进行了多体动力学仿真。仿真结果更接近实验值,证明虚拟样机模型的正确性,表明传动机构的轮系接触碰撞也同样影响G摆卡子的振动特性,所得结论对擒纵机构零件的设计与强度校核具有重要的参考价值。

To research the time characteristic of runaway escapement, almost all of the multi - body dynamics simulation of runaway escapement only consider the impact of escapement mechanism parameters on the pallet vibra- tion characteristics, while ignore the drive gears. To accurately predict the insurance time, virtual prototyping technique was applied. The 3 - D model was created with UG software, the complete virtual prototyping model of runaway escapement was built using ADAMS software, and the dynamic simulations of drive gears ideal state were respectively carried on, taking into account the deformation of shaft and considering contact and impact between the gears. The simulation result is more closed to the experimental value, it also verifies the correctness of the virtual prototype model and indicates that the contact and impact between drive gears also have influence on the pallet vibration characteristies. The conclusions can offer some important references to the design and intensity of the parts.