Coring Tests of Core Drilling Tool and Analysis of Drilling Parameters
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摘要: 我国探月工程第3期工程的核心任务是实现月球钻探取样和返回,明确采用钻取方式获取深2 m的月壤样品.针对月表极端钻进环境,提出一种内外管联合取心螺旋钻具,即内管软袋提拉取心,外管螺旋集输取心.模拟月壤钻进试验结果表明,该取心钻具能实现有效钻进可靠取心,特别适合小于0.6 m浅层模拟月壤钻取.试验研究了钻进规程对模拟月壤取心率和钻进功耗的影响规律,得出了钻进转速、进给速度值域与功率值域的关联性,对月球环境下取心钻具研制和钻进规程制定具有实际工程应用价值.Abstract: The core task of the third stage of China's Lunar Exploration Program is to realize the lunar drilling and sampling and returning to the earth. 2-meter-deep lunar soil sampling is required through drilling method. Due to the extreme environment on the lunar surface, an auger core drillig tool with joint inner and outer pipe is proposed in this paper. The core in the inner pipe is obtained by pulling the soft bag, and the core in the outer pipe is transported to the collector by the helical blade. Drilling tests on the lunar soil simulant indicate that the auger drilling tool is reliable for coring, especially for the superficial lunar soil with depth less than 0.6 meters. The influences of drilling parameters on core recovery and drilling power consumption in the tests are studied Relationships between rotation speed, the range of drilling footage speed and power are concluded, which can facilitate the development of core drilling tools and the determination of drilling parameters in the lunar environment.
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Key words:
- Core drilling tool /
- coring test /
- drilling parameter /
- lunar soil simulant /
- drilling
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表 1 CUG-1A型模拟月壤颗粒级配分布
Table 1. Grain size distribution of the CUG-1A simulant lunar soil
粒径(mm) >0.075 0.075~0.050 0.050~0.010 0.010~0.005 0.005~0.002 <0.002 含量(%) 20.0 40.3 12.5 17.4 2.5 7.3 表 2 CUG-1A型模拟月壤与实际月壤的主要物理力学性能对比
Table 2. Comparison of the main physics and mechanics parameters between simulant and actual lunar soil
参数 密度(g/cm3) 相对密度(g/cm3) 内摩擦角(°) 内聚力(kPa) 实际月壤 1.60~1.80 2.90~3.20 25~50 0.20~1.80 模拟月壤 1.45~1.90 2.88 20~21 0.21~1.71 表 3 内管取心试验数据
Table 3. Test data of the inner tube coring
序号 转速(r/min) 进给量(mm/min) 进尺(mm) 模拟月壤质量(g) 内管取心率(%) 功率(W) 1 40 100 750 31 23.9 2 40 100 750 92 71.1 17 3 40 100 750 125 96.7 4 80 100 730 58 44.8 5 80 100 710 103 79.6 35 6 80 100 720 74 57.2 7 120 100 690 52 60.1 8 120 100 800 88 63.8 53 9 120 100 780 106 78.8 10 160 100 790 42 30.8 11 160 100 990 131 76.7 79 12 160 100 990 139 81.4 13 200 100 990 0 0 14 200 100 990 143 83.8 100 15 200 100 990 120 70.3 16 240 100 1 000 134 77.2 17 240 100 990 32 18.7 120 18 240 100 990 131 76.7 19 280 100 990 133 77.9 20 280 100 990 144 84.3 145 21 280 100 900 76 48.9 22 320 100 900 28 18.0 23 320 100 900 13 10.9 170 24 320 100 900 97 62.5 平均 87.1 58.0 表 4 联合取心钻进试验参数与结果
Table 4. Drilling parameters and test results of the combined inner and outer tube coring method
序号 转速
(r/min)
进给量
(mm/min)
进尺
(mm)
内管取样量
(g)
内管取心率
(%)
外管取样量
(g)
外管取心率
(%)
本机具取心率
(%)
功率
(W)1 40 100 800 77 55.8 580 86.2 81.0 2 40 100 800 87 63.1 602 89.5 85.0 13 3 40 100 800 100 72.5 590 87.7 85.1 4 80 100 800 97 70.3 640 95.1 90.1 5 80 100 800 118 85.5 655 97.3 95.3 31 6 80 100 800 123 89.2 601 89.3 89.2 7 120 100 800 128 92.8 652 96.8 96.2 8 120 100 800 126 91.3 705 104.7 102.3 61 9 120 100 800 120 87.0 580 86.2 86.3 10 160 100 800 130 94.2 715 106.2 104.2 11 160 100 800 71 51.4 715 106.2 97.0 70 12 160 100 740 91 71.3 767 123.2 114.4 13 200 100 720 106 85.4 609 100.5 97.9 14 200 100 800 124 89.8 743 110.5 107.0 90 15 200 100 800 109 79.0 600 89.1 87.5 16 240 100 800 103 74.6 700 104.0 99.0 17 240 100 800 85 91.6 802 119.2 109.3 120 18 240 100 800 116 84.1 745 110.7 106.2 19 280 100 680 100 85.2 623 108.9 104.8 20 280 100 720 108 87.0 685 113.1 108.6 130 21 280 100 800 117 84.8 741 110.1 103.8 22 320 100 800 131 95.0 789 117.2 113.5 23 320 100 710 75 61.5 685 114.7 105.6 150 24 320 100 800 124 89.5 687 102.1 100.0 平均 106.9 80.4 675.4 102.8 98.7 -
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