Mechanical Analysis and Structure Optimization of Lunar Soil Coring Mechanism

Qiuyi Fang, Qin Zhou, Jianguo Lv, Jing Wang

Abstract

The soft bag lunar soil coring mechanism of turning inward type without sliding has the characteristics of simple structure, low power dissipation and well regolith bedding information-keeping. However, at the initial coring stage, the large pulling force and torque, which are resulted from the spiral movement of lunar soil around bit when it enters the holding-pipe, can consequently cause high power dissipation and bad regolith bedding information-keeping. In the paper, in order to achieve the goal of the minimum of pulling force and torque, a mechanical model representing the interaction of lunar soil on coring mechanism was established to analyze effects of structural parameters and drilling parameters on the pulling force and torque. The structural parameters of coring mechanism and drilling parameters were optimized. The results show that soft bag thickness and guide head radius have the greater impact on the pulling force and on the torque respectively. When the guide head radius is 0.5mm and the soft bag thickness is 0.2mm, the rope pulling force can reach its optimal value of 89N, which can greatly reduce the degree of torsion in the process of coring.

Download


Paper Citation


in Harvard Style

Fang Q., Zhou Q., Lv J. and Wang J. (2018). Mechanical Analysis and Structure Optimization of Lunar Soil Coring Mechanism.In Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG, ISBN 978-989-758-342-1, pages 533-540. DOI: 10.5220/0007433105330540


in Bibtex Style

@conference{iweg18,
author={Qiuyi Fang and Qin Zhou and Jianguo Lv and Jing Wang},
title={Mechanical Analysis and Structure Optimization of Lunar Soil Coring Mechanism},
booktitle={Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG,},
year={2018},
pages={533-540},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007433105330540},
isbn={978-989-758-342-1},
}


in EndNote Style

TY - CONF

JO - Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG,
TI - Mechanical Analysis and Structure Optimization of Lunar Soil Coring Mechanism
SN - 978-989-758-342-1
AU - Fang Q.
AU - Zhou Q.
AU - Lv J.
AU - Wang J.
PY - 2018
SP - 533
EP - 540
DO - 10.5220/0007433105330540