气动潜孔锤缓冲碟簧载荷特性仿真与实验

碟形弹簧的载荷变形关系直接影响潜孔锤系统振动特征。利用Muhr公式及有限元软件ANSYS分别对矩形截面、平行四边形截面缓冲碟形弹簧载荷变形特性进行计算。并对平行四边形截面碟形弹簧进行了实验。仿真与实验的结果显示,Muhr公式适用于矩形截面碟形弹簧。对于平行四边形截面碟形弹簧,应用Muhr公式计算会带来较大误差。变形量较大时,碟形弹簧载荷作用位置发生改变,考虑接触的有限元模型计算的结果与实验结果一致,因此,利用有限元法可以精确地数值模拟潜孔锤缓冲碟簧特性参数。

Simulation and experiment studies on load-deformation of disc spring in pneumatic DTH hammer

Disc spring load-deformation characteristics can directly affect pneumatic DTH hammer system vibrations.Formula Muhr and finite element software ANSYS were employed to study the load-deformation characteristics of disc spring with rectangle section and parallelogram section separately.To verify the feasibility of the simulation,experiments on the load-deformation of disc spring with parallelogram section were investigated.Then simulation results are compared with experimental data.The comparison shows that formula Muhr can be suitably applied for disc spring with rectangle section but will bring great error for those with parallelogram sections.When deformation is large enough,the place of applied force can be changed,and the finite element analysis results with contact considered can agree well with the experiment results.Thus finite element method can provide more accurate and suitable characteristic parameters of disc spring for the vibration control design of DTH hammer.