Drilling Power Consumption Analysis of Coring Bit in Lunar Sample Mission
Publication: Journal of Aerospace Engineering
Volume 30, Issue 5
Abstract
Accurately predicting power consumption of the coring bit is a crucial building block of a lunar sampling mission. The total power consumed by a coring bit consists of two portions: the power consumed by the cutters in drilling soil and the power required to overcome the friction between the soil and the bit body. Based on soil mechanics and the elastic–plastic theory, this paper proposes a model that describes the interaction between the cutter and the soil. Analysis of this model confirms the hypothesis that cutting speed has a minimal effect on the cutting force, especially when cutting speed is low. Based on the assumption that low-speed rotary cutting is similar to linear cutting, cutting force and power consumption are tested experimentally. Results show that power consumed by drilling soil contributes to 70% of the total power consumption, and the power consumed to overcome friction contributes to 30% of the total power consumption.
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Acknowledgments
The authors thank the China Academy of Space Technology (CAST) for its help during the investigation. The work was supported by the Chinese Scholarship Council (CSC). This study was supported by the National Defense Science and Technology Major Project (Grant Nos. TY3Q20110001 and TY3Q20110005), the Programme of Introducing Talents of Discipline to Universities (Grant No. B07018), Harbin University of Commerce Doctoral Scientific Research Foundation (Grant No. 2016BS07), Youth Innovative Talent Support Program of Harbin University of Commerce (Grant No. 2016QN067), Harbin special funds of innovative talents of science and technology (Grant No. 2014RFXXJ057), and Harbin University of Commerce research group funds (Grant No. 2016TD005).
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Published In
Journal of Aerospace Engineering
Volume 30 • Issue 5 • September 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jul 20, 2016
Accepted: Mar 20, 2017
Published online: Jun 24, 2017
Published in print: Sep 1, 2017
Discussion open until: Nov 24, 2017
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