PDF(6824 KB)
Research on the Thermal Features of the Drilling Process Under the Simulated Lunar Surface Environment
- LAI Xiaoming1, BAI Shuxin2, ZHAO Zeng3, PANG Yong3, YIN Shen3
Author information
+
1. Astronautical and Material Engineering Institute, National University of Defense Technology, Changsha 410037, China
2. Astronautical and Material Engineering Institute, National University of Defense Technology, Changsha 410037, China
3. Beijing Satellite Manufacturing Factory, Beijing 100081, China
Show less
History
+
According to the requirements of the lunar surface sampling task, The lunar regolith sampler need to drill under vacuum conditions, and realize the continuous drilling without aided-cooling medium. It is very easy to cause a rapid temperature rise on bit, which resulted in making effect on the reliability of the sampling task. Thus, in order to study on the thermal characteristics of the bit in drilling process, the cutting and friction mechanism between blade on bit and the lunar soil is analyzed in this paper. A temperature rise model of bit is established, and the main factors that influence the temperature rise of the drill bit are obtained. According to the lunar vacuum environment, the 2 m drilling depth lunar soil simulant is prepared, and its vacuum degree below 10 Pa, simultaneously, the thermal feature drilling tests are performed. The experimental results show that there is a strong positive correlation between the temperature rise and the weight on bit at the front of the drill bit, and the correlation on bit torque is weak. The correlation coefficient of the model of the temperature rise prediction is modified based on the test results. The fitting curve of the temperature rise is obtained, and the comparison of the results between fitting and test has been carried out. The qualitative analysis of the thermal characteristics of the bit in drilling process is acquired.
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
This is a preview of subscription content, contact
us for subscripton.
References
[1] 欧阳自远. 我国月球探测的总体科学目标与发展战略[J]. 地球科学进展,2004,19(3):351-358.Ouyong Z Y. Scientific objectives of Chinese lunar exploration project and development strategy[J]. Advance in Earth Sciences,2004,19(3):351-358.
[2] Wood J A. Petrology of the lunar soil and geophysical implications[J]. Journal of Geophysical Research,1970,75(32):6497-6513.
[3] Zhao Z,Hou X Y,Yin S,et al. Research of thermal characteristics in core sampler of lunar soil with vacuum environment[C].//The 64th International Astronautical Congress. Beijing:[s.n.],2013.
[4] 赵建康,曲敬信,邓福铭. 孕镶金刚石钻头工作温升的理论分析[J]. 煤田地质与勘探,2004,32(4):57-59.Zhao J K,Qu J X,Deng F M. Theoretical study on temperature rising of the diamond bit[J]. Coal Geology & Exploration,2004,32(4):57-59.
[5] Grant H,David V,Bevan M F. Lunar sourcebook:a user's guide to the Moon[M]. Cambridge,UK:CUP Archive,1991.
[6] McKay D S,Heiken G,Basu A,et al. The lunar regolith[M]. Lunar sourcebook. Cambridge,UK:CUP Archive,1991:285-356.
[7] Carrier Ⅲ W D. Particle size distribution of lunar soil[J]. Journal of Geotechnical and Geoenvironmental Engineering,2003,129(10):956-959.
[8] Carrier W D. Soviet rover systems[C]//AIAA,Space Programs and Technologies Conference. Huntsville,AL,USA:AIAA,1992,1-8.
[9] Carrier Ⅲ W D. Lunar soil simulation and trafficability parameters[J]. Lunar Geological Institute,2006,1-16.
[10] Tien C L,Nayak A L. 1975. Analytical models for lunar soil thermal conductivity[C]//AIAA Tenth Thermophysics Conference. Denver,Colorado:AIAA,1975:1-8.
AI Summary
