含渗碳层和铜合金牙轮钻头轴承的面接触分析

应用ANSYS的参数化设计语言APDL, 研究了牙轮钻头滑动轴承表面渗碳层和镶嵌的铜合金对轴承强度的影响。首先建立了牙轮钻头滑动轴承三维接触有限元模型, 然后利用网格划分技术分别对其表面渗碳层、镶嵌的铜合金和钻头本体进行网格划分和单元属性定义, 最后施加边界条件进行接触有限元分析求解。结果表明, 轴承接触应力峰值和Mises应力峰值位于铜合金和渗碳层结合部位。这一现象与实际使用的牙轮钻头滑动轴承失效的部位相吻合, 说明接触有限元分析的结果是正确可靠的。

Surface-to-surface contact analysis of sliding bearing for roller bit with carburized layer and copper alloy strips

This article applies ANSYS Parametric Design Language (APDL) to study the influence of carburized layer and copper alloy strips on strength of Slide Bearing for Roller Bit (SBFRB). 3-D models for SBFRB are established. Meshing technology of ANSYS is used to mesh the bit body, the carburized layers on SBFRB and copper alloy strips distributed in cone layer, and the attributes of the three elements are defined. Finally by applying the boundary constraints and solving the problem, the results show that concentration of contact stress and Mises stress is located near bonding areas between the carburized layer and copper alloy strips. The phenomena are coincident with failed SBFRB on the spot and prove that the computed results are reliable and correct.