深层月壤取芯方案设计与验证技术研究

发布时间：2018-01-08 01:01

本文关键词：深层月壤取芯方案设计与验证技术研究　出处：《哈尔滨工业大学》2012年硕士论文　论文类型：学位论文

【摘要】：探月工程三期的核心目标是“采样返回”，预计于2017年前后实施，届时将利用钻取、表取两种采样方式获取月球样品。钻取采样的目标是：获取月面以下2m保持原态层理信息的月壤样品。其中，月壤取芯动作是采样成败的关键性环节，取芯方案、取芯机构设计是探月工程三期预先研究需首先予以突破的关键技术之一。本文以哈尔滨工业大学承担的月面采样预先研究项目为工程背景，结合我国月面采样的初步方案规划，开展深层月壤取芯多方案比较与分析工作，对优选的取芯方案进行细化设计和试验验证，支撑钻取采样装置工程实施方案的制定。本文深入调研分析了国内外星球土壤样品取芯技术，通过理论分析和试验对比，提出了满足我国探月工程三期采样指标要求的取芯总体方案“内翻式无滑差软袋取芯”；基于“内翻式无滑差软袋取芯”原理，根据目前采样钻具和钻进驱动机构设计适应性要求，在充分满足取芯机构轻量化、低功耗、高取芯率、高层理信息保持性等约束条件的基础上，完成了两套深层月壤取芯功能实现方案的详细设计，两套方案均涵盖软袋布置方案及封口方案。基于岩土力学和理论力学等理论体系，研究了取芯特性参数与取芯负载间的关系，以低功耗为目标初步完成了取芯特性参数的优化，为后续试验件参数的制定提供了理论依据；定性分析了取芯材料特性参数对取芯率及层理信息的影响，给出了取芯柔性组件材料的设计优化方向。根据参数优化分析结果，结合取芯机构特殊工作环境的需要，，提出了深层月壤取芯机构的详细性能需求，并给出了相应的性能实现方案，研制出了针对两套方案的取芯验证试验件。研制了取芯功能验证试验装置，完成了针对两套试验件的取芯功能验证试验与封口效果验证试验；利用环境设备、材料性能测试设备等试验条件完成了取芯柔性组件的高低温、辐照环境下力学性能验证试验、可靠性验证试验以及化学稳定性验证试验，从功能和性能两个角度验证了方案的可行性与可靠性。
[Abstract]:The core goal of the third phase of the lunar exploration project is "sampling and return", which is expected to be implemented around 2017, when drilling will be used. The goal of drilling sampling is to obtain the lunar soil sample which is 2 m below the lunar surface to keep the original stratigraphic information. The core action of lunar soil is the key link of the success or failure of sampling. The design of core-fetching mechanism is one of the key technologies that need to be broken through in the third phase of lunar exploration project. This paper takes the project of lunar surface sampling as the engineering background of Harbin University of Technology. Combined with the preliminary plan of lunar surface sampling in China, the comparison and analysis of the core extraction schemes of deep lunar soil were carried out, and the detailed design and experimental verification of the selected core extraction scheme were carried out. Make the project implementation scheme of the supporting drilling sampling device. In this paper, the coring technology of the soil samples of the planets at home and abroad was investigated and analyzed, and the theoretical analysis and experimental comparison were carried out. This paper puts forward the overall core-fetching scheme, which meets the requirement of sampling index in the third phase of the lunar exploration project in China. Based on the principle of "unslip soft bag coring", according to the design adaptability requirement of sampling drilling tool and drilling driving mechanism, it can fully meet the requirements of light weight, low power consumption and high coring rate of coring mechanism. On the basis of the constraint conditions such as the retention of high-level information, two sets of deep lunar soil coring schemes are designed in detail, both of which cover the soft bag arrangement and sealing scheme. Based on the theoretical system of geotechnical mechanics and theoretical mechanics, the relationship between coring characteristic parameters and coring load is studied, and the optimization of coring characteristic parameters is preliminarily completed aiming at low power consumption. It provides a theoretical basis for the formulation of the parameters of the subsequent test piece. The influence of characteristic parameters of coring material on coring rate and bedding information is analyzed qualitatively, and the optimization direction of material design for core-taking flexible assembly is given. According to the results of parameter optimization analysis and the need of special working environment of coring mechanism, the detailed performance requirements of deep lunar soil coring mechanism are put forward, and the corresponding performance realization scheme is given. A coring and verification test piece for two sets of schemes has been developed. The coring function verification test device was developed, and the coring function verification test and sealing effect verification test for two sets of test pieces were completed. The high and low temperature, irradiation mechanical properties, reliability and chemical stability tests of core-taking flexible assembly were completed by using environmental equipment, material performance testing equipment and other test conditions. The feasibility and reliability of the scheme are verified in terms of function and performance.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：P634;V476.3;P184

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