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为了优化竖井钻机的结构,提高泥浆的吸收效率,借助有限元技术对竖井钻机中泥浆的三维流场进行了模拟分析。分析结果显示泥浆的流动趋势是螺旋形状。为了得到螺旋形状的具体结构,在假设条件推导出了理想情况下泥浆的流线方程。理想流线形状说明刀具的现有布局基本上是合理的,而吸收口的偏心特性使得泥浆的流动不够理想。根据这一结论,借助于有限元技术对吸收口的结构进行了优化分析,并结合工程实际给出了合理的改进方案。
In order to optimize the structure of the shaft drilling rig and improve the absorption efficiency of the mud, the three-dimensional flow field of the mud in the shaft rig was simulated by finite element analysis. The analysis results show that the mud flow tendency is a spiral shape. In order to obtain the specific structure of the spiral shape, the equation of the flow line of the slurry under ideal conditions is deduced. The ideal streamlined shape shows that the tool’s existing layout is basically reasonable, whereas the eccentric nature of the suction port makes the flow of mud less than ideal. According to this conclusion, the structure of the suction port is optimized by means of finite element analysis, and a reasonable improvement plan is given according to the engineering practice.