井窖孔制作机关键部件振动及其沿手臂传递特性研究

井窖孔制作机使用时操作人员操作手臂受到强烈的振动感,为降低手臂的振动感、了解振动沿手臂传递特性及优化设计其关键部件。通过建立手臂系统的振动分析模型,利用DH5925动态信号采集系统对井窖孔制作机关键部件的振动频谱和人体手臂系统的振动传递特性进行测试与分析。结果表明:锥形成孔钻头与瓦片式成孔钻头工作时井窖孔制作机把手处的振动基频分别为37.59 Hz、38.08 Hz;由理论分析得到手臂系统对振动能量的吸收及耗散与手臂系统受到激励频率成正比,通过试验分析,最大工作转速下手臂各测点振动传递率最低,手臂系统对把手处传递的振动能量吸收与耗散最多;即需重点优化其操作把手的结构及材料参数,以降低振动对手臂系统的损伤。该研究可为井窖孔制作机基于人机工程学的改机设计提供一定的依据。

Study on vibration of key components of well-cellar making machine and its transfer characteristics along arms

When the well-cellar making machine is used, the operator’s operating arm is subjected to a strong vibration, in order to reduce the vibration of the arm, to acknowledge the vibration transfer characteristics along the arm and to optimize the design of its key components. In this paper, by establishing the vibration analysis model of the arm system, the DH5925 dynamic signal acquisition system is used to test and analyze the vibration spectrum of the key components of the well-cellar making machine and the vibration transmission characteristics of the human arm system. The results show that the fundamental frequencies of the vibration at the handle of the well-cellar making machine are 37.59 Hz and 38.08 Hz. When the cone-forming hole drill bit and the tile-type hole-drilling bit are working. The theoretical analysis shows that the arm system absorbs and dissipates the vibration energy. It is proportional to the excitation frequency Through the test analysis, the vibration transmission rate of the arm at each measuring point is the lowest at the maximum working speed, and the arm system absorbs and dissipates the vibration energy transmitted to the handle at most;that is, the structure of the operating handle should be optimized. Material parameters to reduce vibration damage to the arm system. This research can provide a basis for the boring machine design based on ergonomics.