A new planetary exploration coring bit design and its performance tests research

摘要

According to the function requirements of coring bit for planetary exploration, and a new coring bit with barrier ring structure is developed to resolve the low coring ratio problem. The model of coring bit cutting tools and generalized planetary regolith interaction is established. The planetary soil lateral failure model which caused by cutting tools is analyzed and established. Take the Lunar soil as an example, the influence of structure parameters of cutting tools for cutting force and coring ratio is analyzed. Test have shown that with the barrier ring structure of the bit can improve the coring ratio effectively. However, the horizontal cutting force is significantly higher, the axial force is decline. The conclusion of research could provide the theoretical basis of lunar sampling drill design for Chang E project.