矿用液压支架掩护梁的受力分析及结构优化

Force Analysis and Structural Optimization of Shield Beam of Mine Hydraulic Support

掩护梁是液压支架重要的承力结构件,工作中容易因为受力过大而引发故障问题。以ZY4000型液压支架为例,开展了液压支架掩护梁结构的受力有限元分析研究,结果发现,掩护梁工作时存在显著的应力和位移变形集中现象,应力和位移变形最大值分别为858.89 MPa和18.812 mm。通过对应力和位移变形较大的部位增加厚度及较小部位减小厚度的方式,对掩护梁进行结构优化改进,优化后掩护梁的最大应力值降低到338.64 MPa,使其结构使用寿命提升了20%以上,对提高液压支架的作业安全性具有重要作用。

The shield beam is a very important load-bearing structure in hydraulic support,and it is easy to cause failure due to excessive force in work.Taking the ZY4000 hydraulic support as an example,the finite element analysis of the shield beam structure of hydraulic support is carried out.The results show that there is a significant concentration of stress and displacement deformation when the shield beam works.The maximum stress and displacement deformation are 858.89MPa and 18.812mm respectively.By increasing the thickness of the larger part of the stress and displacement deformation and reducing the thickness of the smaller part,the structure of the shield beam is optimized and improved.After optimization,the maximum stress of the shield beam is reduced to 338.64MPa,and the service life of the structure is increased by more than 20%,which plays an important role in improving the operation safety of the hydraulic support.