發(fā)布時間：2018-06-03 00:04

  本文選題：鉆取采樣 + 空心外螺旋鉆桿��； 參考：《哈爾濱工業(yè)大學》2011年碩士論文

【摘要】：本課題針對我國探月三期工程的任務目標,為實現(xiàn)月面鉆取采樣機構(gòu)的輕量化、低功耗、高效率和高可靠設(shè)計,在分析國外地外天體鉆取采樣技術(shù)的基礎(chǔ)上,基于土力學理論、巖土鉆掘工程學,結(jié)合月壤的機械和物理特性,對其核心執(zhí)行部件——采樣鉆具與月壤間的相互作用力學模型進行了基礎(chǔ)研究,包括空心外螺旋鉆桿與月壤間的相互作用力學模型研究和取心鉆頭與月壤間的相互作用力學模型研究。在此基礎(chǔ)上,通過參數(shù)影響分析,對月面采樣鉆具在月壤中的鉆進取心特性進行了研究。 根據(jù)空心外螺旋鉆桿與月壤間的相互作用機理,本文提出了一種空心外螺旋鉆桿與月壤相互作用的等效模型——光桿模型,該模型能夠?qū)⒖招耐饴菪@桿與月壤間的相互作用統(tǒng)一等效至空心外螺旋鉆桿外包絡(luò)面上進行分析。通過對光桿模型微元進行運動學分析,建立了光桿模型與月壤相互作用的力學模型。通過分析光桿模型表面月壤應力在深度方向的變化規(guī)律,結(jié)合光桿模型微元的準靜力學分析,建立了空心外螺旋鉆桿阻力矩和輔助鉆壓力關(guān)于月壤參數(shù)、鉆桿參數(shù)和鉆進規(guī)程參數(shù)的解析模型。 結(jié)合月面采樣鉆具的工藝和需求,本文提出了一種復合式月壤取心鉆頭,該鉆頭同時具備切削破碎、排屑和阻隔取心等功能。通過分析取心鉆頭與月壤間的相互作用機理,基于切削具作用土壤的失效機理和臨界深度預測模型,對月壤在取心鉆頭切削具作用下的失效機理進行了研究。通過分析取心鉆頭切削具實際切削角,結(jié)合切削具作用月壤的失效機理,建立了切削具與月壤相互作用的力學模型,并給出了切削具切削力的解析模型。通過疊加切削具切削阻力矩,建立了取心鉆頭在恒鉆壓力作用下的阻力矩解析模型。 基于空心外螺旋鉆桿與月壤相互作用力學模型,給出了鉆桿參數(shù)和鉆進規(guī)程參數(shù)對鉆桿阻力矩、輔助鉆壓力、功率和進尺速度的影響分析。為了便于取心鉆頭切削具作用月壤失效角的準確和快速搜索,建立了一種失效角預估模型�；谌⌒你@頭與月壤相互作用力學模型,給出了切削具作用月壤失效距離、取心鉆頭結(jié)構(gòu)參數(shù)、月壤外摩擦角和鉆壓力對取心鉆頭阻力矩的影響分析。參數(shù)影響分析對鉆具與月壤間的相互作用進行了數(shù)學描述,為月面鉆取采樣機構(gòu)的負載分析和鉆具優(yōu)化設(shè)計奠定了理論基礎(chǔ)。
[Abstract]:In order to realize the lightweight, low power consumption, high efficiency and high reliability design of the lunar drilling sampling mechanism for the third phase of the lunar exploration project in China, this subject is based on the analysis of the sampling technology of the foreign extraterrestrial bodies and the theory of soil mechanics. Based on the mechanical and physical properties of lunar soil, the mechanical model of the interaction between sampling drilling tool and lunar soil is studied. The research includes the study of the interaction mechanics model between hollow outer helical drill pipe and lunar soil and the mechanical model of the interaction between core bit and lunar soil. On the basis of this, the coring characteristics of lunar surface sampling drilling tools in lunar soil were studied by analyzing the influence of parameters. According to the interaction mechanism between hollow outer helical drill pipe and lunar soil, an equivalent model of interaction between hollow outer helical drill pipe and lunar soil is presented in this paper. The model can unify the interaction between the hollow outer helical drill pipe and the lunar soil and analyze the outer net surface of the hollow outer helical drill pipe. Based on the kinematics analysis of the bare rod model, a mechanical model of the interaction between the bare rod model and the lunar soil was established. By analyzing the variation law of lunar soil stress on the surface of the bare rod model and combining the quasi-static analysis of the micro-element of the bare rod model, the resistance moment of the hollow outer spiral drill pipe and the auxiliary drilling pressure on the parameters of the lunar soil are established. The analytical model of drill pipe parameters and drilling rules parameters. Combined with the technology and requirement of lunar surface sampling drilling tool, a compound lunar soil coring bit is presented in this paper, which has the functions of cutting and breaking, chip removal and blocking coring. Based on the analysis of the interaction mechanism between the core bit and the lunar soil, based on the failure mechanism of the cutting tool soil and the prediction model of critical depth, the failure mechanism of the lunar soil under the action of the core bit cutting tool was studied. Based on the analysis of the actual cutting angle of the core bit cutting tool and the failure mechanism of the cutting tool acting on the lunar soil, the mechanical model of the interaction between the cutting tool and the lunar soil is established, and the analytical model of the cutting force of the cutting tool is given. The analytical model of resistance moment of core bit under constant drilling pressure is established by superimposing cutting resistance moment of cutting tool. Based on the mechanical model of the interaction between hollow outer helical drill pipe and lunar soil, the effects of drill pipe parameters and drilling rules parameters on drill pipe resistance moment, auxiliary drilling pressure, power and feed speed are analyzed. In order to facilitate the accurate and fast searching of the failure angle of the core bit cutting tool, a prediction model of failure angle was established. Based on the mechanical model of the interaction between the core bit and the lunar soil, the effects of the failure distance of the cutting tool on the lunar soil, the structural parameters of the core bit, the external friction angle of the lunar soil and the drilling pressure on the resistance moment of the core bit are analyzed. The interaction between drilling tool and lunar soil is described by parameter influence analysis, which lays a theoretical foundation for load analysis and optimum design of drilling tool for lunar drilling sampling mechanism.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：P184.5

【引證文獻】

相關(guān)期刊論文 前1條

1 鄧宗全;田野;唐德威;姜生元;全齊全;肖洪;;用于地外星體探測的一種新結(jié)構(gòu)取心鉆頭研究[J];機械工程學報;2013年19期

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本文編號：1970692