单牙轮钻头轴承接触应力分析

CONTACT STRESS ANALYSIS ON THE BEARING OF SINGLE-CONE BITS

采用Pro/M分析软件 ,利用接触问题的有限元法 ,对单牙轮钻头轴承内接触受力做了进一步的分析和研究。对轴承内应力的分布 ,轴向载荷与径向载荷的关系 ,钻头结构参数、钻压与接触应力和接触面积的关系作了论述 ,得出了轴颈上接触应力的分布规律曲线 。

The contact stress of the bearing of single-cone bit were studied and analyzed with the software Pro/M and the method FEM. The bearing stress distribution, the relations between axial load and radial load, the relations between the structure parameter of the bit, WOB and contact stress, as well as the contact area were discussed in detail. The distributing curve of the contact stress on the bearing was obtained, some suggestions to design the bearing of the bit was presented.