本文選題：旋轉(zhuǎn)導(dǎo)向系統(tǒng)　切入點：偏置心軸　出處：《中國地質(zhì)大學(xué)(北京)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：機械內(nèi)偏置指向式旋轉(zhuǎn)導(dǎo)向系統(tǒng)可以很好地解決滑動導(dǎo)向鉆井中鉆進效率低、鉆進深度受限、井眼光滑、對水平井和復(fù)雜井鉆進困難等問題。已有研究成果表明偏置心軸是導(dǎo)向機構(gòu)中的薄弱環(huán)節(jié),本文應(yīng)用數(shù)值模擬方法研究機械內(nèi)偏置指向式旋轉(zhuǎn)導(dǎo)向系統(tǒng)導(dǎo)向機構(gòu)中偏置心軸動力學(xué)及疲勞特性,為導(dǎo)向機構(gòu)的心軸的設(shè)計提供技術(shù)支持。論文在已有試驗樣機的基礎(chǔ)上,用Solidworks和Ansysworkbench軟件建立了偏置心軸及軸承的力學(xué)模型,確定了單元類型、材料屬性和心軸的約束條件等參數(shù),計算得出心軸的在靜止偏置力作用下的應(yīng)力、應(yīng)變及撓度大小。對導(dǎo)向機構(gòu)的心軸進行了動力學(xué)仿真分析,模擬心軸在不同的撓度情況下,旋轉(zhuǎn)彎曲過程中的偏轉(zhuǎn)角度、最大應(yīng)力和偏置力等參數(shù),并將其與已有的理論分析、試驗研究、靜力學(xué)分析等結(jié)果進行對比分析,為設(shè)計改進提供了依據(jù)。利用鈦合金心軸材料的疲勞曲線,在RecurDyn軟件中進行擬合,在心軸的應(yīng)力應(yīng)變水平下選擇相關(guān)的疲勞計算準則和應(yīng)力歷史修正方法計算得出心軸的疲勞壽命,并與理論計算和試驗得出的壽命進行了分析對比,給出了偏置心軸設(shè)計的改進意見。
[Abstract]:The rotary steering system with mechanical bias pointing can solve the problems of low drilling efficiency, limited drilling depth and smooth borehole in sliding guide drilling. For horizontal well and complex well drilling difficulty, the research results show that the bias core shaft is the weak link in the guiding mechanism. In this paper, a numerical simulation method is used to study the dynamic and fatigue characteristics of the bias axis in the steering mechanism of the mechanical internal bias steering system, which provides technical support for the design of the steering mechanism. The mechanical model of the eccentric shaft and bearing is established by using Solidworks and Ansysworkbench software. The parameters such as element type, material properties and constraint conditions of the shaft are determined, and the stress of the core shaft under the action of static bias force is calculated. The dynamic simulation analysis of the core shaft of the steering mechanism is carried out. The parameters such as the deflection angle, the maximum stress and the deflection force of the core shaft in the process of rotating and bending under different deflection conditions are simulated. The results of theoretical analysis, experimental study and statics analysis are compared and analyzed, which provides the basis for design improvement. The fatigue curves of titanium alloy core shaft are fitted in RecurDyn software. The fatigue life of the core shaft is calculated by selecting the relevant fatigue calculation criterion and the stress history correction method under the stress strain level of the core shaft, and the fatigue life of the core shaft is analyzed and compared with that obtained by the theoretical calculation and the test. Some suggestions for improving the design of bias axis are given.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE92
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本文編號：1579776