钻具结构与钻进参数对月壤采样率的影响规律

The effect of drilling tool structure and drilling parameters on lunar soil sampling rate

摘要:

“嫦娥五号”探月工程任务的圆满完成，标志着我国对月球采样的开始。为了获得月表地质信息，在月球的低重力和无循环介质等特殊环境条件下，螺旋钻具有着较好的钻进采样效果。为了获得更好的采样效果，提高钻进采样率，本文结合转速和钻速2个钻进参数，以及钻具长度、钻具内径、螺距和螺旋翼高度4个钻具结构参数，采用正交试验，进行模拟月壤钻进采样试验。同时采用极差分析和方差分析法对采样率和密度变化率2个试验指标结果进行分析，获得以下结论：（1）分别获得采样率和密度变化率指标下的各因素影响程度排序。（2）分别获得各因素对采样率和密度变化率的影响趋势。（3）分别获得采样率和密度变化率2个试验指标下的参数优化组合。

Abstract:

The successful completion of the Chang’e-5 lunar exploration mission marks the beginning of China’s lunar sampling efforts. To obtain lunar surface geological information and adapt to the unique environmental conditions of the Moon， such as low gravity and the absence of a circulating medium， helical drill tools demonstrate good performance in drilling and sampling. To achieve better sampling results and improve the drilling and sampling rate， this study combines two drilling parameters-rotational speed and drilling speed and four drill tool structural parameters-drill tool length， inner diameter， pitch， and helix height-totaling six parameters. Using the orthogonal experiments， the research conducted simulated lunar soil drilling and sampling tests. At the same time， the range analysis and analysis of variance were used to analyze the results of the two test indexes of sampling rate and density change rate， and the following conclusions were obtained： （1） the influence degree of each factor under the indexes of sampling rate and density change rate was obtained respectively. （2） The influence trends of each factor on sampling rate and density change rate were obtained. （3） The optimal combination of parameters under the two test indexes of sampling rate and density change rate was obtained.