掘进机悬臂段主轴轴承支撑形式及密封系统的改进设计

我国已经成为世界上最大的掘进机制造基地和应用市场,掘进机械行业已经成为国内高端装备制造业和战略性新兴产业重点支撑发展行业。悬臂段是掘进机连接减速器与截割头的关键部件,在工作过程中起传递扭矩的作用。由于工作条件恶劣,在使用过程中悬臂段仍然存在着多种失效形式。文章首先指出了传统结构悬臂段存在的典型失效形式,包括主轴断裂,腔体内部进入污物,连接花键磨损。然后对悬臂段主轴的部分结构进行改进设计,对比分析悬臂段两种不同轴承支撑结构的特点,并对轴承安装形式进行优化调整,以及对浮动密封结构进行改进设计。并利用Solidworks、ANSYS等有限元分析软件对改进后的悬臂段主轴进行静力分析和振动特性分析。

China has become the largest roadheader manufacturing base and application market in the world, and the tunneling machinery industry has become a key supporting industry of domestic high-end equipment manufacturing and strategic emerging industries. The cantilever section is the key component of the roadheader connecting the reducer and the cutting head, which plays the role of transferring torque in the working process. Due to the poor working conditions, there are still many forms of failure in the cantilever section. First of all, this paper points out the typical failure forms of the cantilever section of the traditional structure, including the fracture of the spindle, the dirt inside the cavity and the wear of the connecting splines. Then the part of the spindle structure of the cantilever section is improved, the characteristics of the two different bearing support structures of the cantilever section are compared and analyzed, the installation form of the bearing is optimized and adjusted, and the floating seal structure is improved. The static analysis and vibration characteristic analysis of the improved cantilever spindle are carried out by using Solidworks,ANSYS and other types of finite element analysis software.