發(fā)布時(shí)間：2018-05-05 17:31

  本文選題：井眼軌跡控制工具 + 組合軸承��； 參考：《長(zhǎng)江大學(xué)》2017年博士論文

【摘要】：井眼軌跡控制工具是一種無(wú)級(jí)可調(diào)新型指向式旋轉(zhuǎn)導(dǎo)向鉆井系統(tǒng),它可靈活并精確地控制井眼軌跡,能夠鉆出平滑、完整的復(fù)雜井眼,具有機(jī)械鉆速高、位移延伸力強(qiáng)等優(yōu)點(diǎn)。這就要求井眼軌跡控制工具的組合軸承能夠在高溫、高壓、大偏轉(zhuǎn)角和重載工況下可靠運(yùn)轉(zhuǎn)。為了精準(zhǔn)地控制井眼軌跡,要求工具的組合軸承在承載時(shí)具有較小的徑向位移和較高的旋轉(zhuǎn)精度。因此,需要深入研究井眼軌跡控制工具組合軸承的力學(xué)性能與疲勞壽命。本文以井眼軌跡控制工具為研究對(duì)象,系統(tǒng)地分析了井眼軌跡控制工具組合軸承的工作原理,提出了組合軸承的載荷、位移以及疲勞壽命分析方法,為組合軸承的設(shè)計(jì)、分析提供了理論依據(jù),并在新型井眼軌跡控制工具中得到了很好地應(yīng)用。本論文的主要研究如下:在考慮工具外殼剛度影響的基礎(chǔ)上,以推力調(diào)心滾子+調(diào)心滾子+推力調(diào)心滾子組成的組合軸承為例,分析了推力調(diào)心滾子和調(diào)心滾子軸承外球面滾道支承工具主軸偏轉(zhuǎn)的工作原理,結(jié)合工具主軸偏轉(zhuǎn)角與內(nèi)外環(huán)偏心距之間的關(guān)系,建立了組合軸承的超靜定靜力學(xué)平衡方程,結(jié)合內(nèi)部各軸承的位移協(xié)調(diào)條件,求解出組合軸承內(nèi)部構(gòu)件的載荷分布。在超靜定靜力學(xué)平衡方程基礎(chǔ)上,考慮井眼軌跡控制工具工作轉(zhuǎn)速,將滾子離心力與陀螺力矩由常規(guī)計(jì)算中的動(dòng)載荷設(shè)為靜載荷,并采用半空間法解決組合軸承靜載荷設(shè)定中的滾子與滾道Hertz接觸與滑動(dòng)問(wèn)題,建立了組合軸承的擬靜力學(xué)平衡方程,主要包括滾子載荷、滾子力矩、滾道載荷和滾道阻力矩等四個(gè)方面�？紤]工具及組合軸承的具體結(jié)構(gòu)和軸承位移協(xié)調(diào)條件,建立了組合軸承簡(jiǎn)化后的有限元分析模型,研究了徑向載荷、軸向預(yù)緊力、主軸偏轉(zhuǎn)角、轉(zhuǎn)速以及內(nèi)外環(huán)偏心距對(duì)組合軸承應(yīng)力和徑向位移的影響;得出組合軸承最大von Mises應(yīng)力位于左推力調(diào)心滾子與滾道在徑向載荷方向的接觸面上,為362.86MPa。井眼軌跡控制工具工作的環(huán)境溫度較高,本文就環(huán)境溫度對(duì)組合軸承及軸承滾子與滾道固-固傳導(dǎo)關(guān)系進(jìn)行了研究,建立了組合軸承熱力耦合分析模型,求解了環(huán)境溫度分別為50℃、100℃和150℃三種情況下,組合軸承應(yīng)力及溫度場(chǎng)的分布;得出組合軸承的最高溫度區(qū)域分布在調(diào)心滾子軸承在徑向載荷方向的接觸面上,達(dá)到152.7℃,組合軸承最大von Mises應(yīng)力隨著環(huán)境溫度的升高而增大,分別為415.05MPa(50℃)、509.04MPa(100℃),629.74MPa(150℃),徑向位移隨著環(huán)境溫度的升高而減小,分別為5.16μm(50℃)、5.04μm(100℃),4.91μm(150℃)。利用井眼軌跡控制工具和工具的測(cè)試控制系統(tǒng),采用自制的徑向位移測(cè)量短節(jié),設(shè)計(jì)了轉(zhuǎn)速、內(nèi)外環(huán)偏轉(zhuǎn)角和偏心距對(duì)組合軸承徑向位移影響的正交實(shí)驗(yàn)方案,完成了216次的混合水平完全正交實(shí)驗(yàn),得出偏心距對(duì)組合軸承徑向位移的影響最大,與有限元分析結(jié)果的趨勢(shì)完全一致�；趩蝹�(gè)軸承的Lundberg-Palamgren疲勞壽命理論和Ioannides-Harris疲勞壽命理論,分別提出了采用概率乘積定理的組合軸承L-P疲勞壽命經(jīng)驗(yàn)公式,以及結(jié)合熱力耦合分析結(jié)果和實(shí)際工況的I-H疲勞壽命計(jì)算方法,建立了組合軸承IH疲勞壽命分析模型;通過(guò)二種方法與組合軸承壽命試驗(yàn)結(jié)果相比較,發(fā)現(xiàn)組合軸承I-H疲勞壽命計(jì)算方法更符合實(shí)際,可用于同類組合軸承的疲勞壽命計(jì)算。
[Abstract]:Well trajectory control tool is a new type of stepless adjustable directional rotary steering drilling system. It can control well trajectory flexibly and accurately. It can drill smooth and complete complex boreholes, with high mechanical drilling speed and strong displacement extension force. This requires that the combined bearing of the hole trajectory control tool can be high temperature, high pressure and large deviation. In order to accurately control the wellbore trajectory, the combined bearings of the tool have smaller radial displacement and higher rotation accuracy in order to accurately control the wellbore trajectory. Therefore, it is necessary to study the mechanical properties and fatigue life of the combined bearings for well trajectory control tools. The working principle of combined bearing is analyzed systematically, the load, displacement and fatigue life analysis method of combined bearing are put forward, which provides a theoretical basis for the design of combined bearings, and is well applied in the new hole trajectory control tool. The main research in this paper is as follows: in consideration of the following: On the basis of the influence of the stiffness of the tool shell, the working principle of the spindle deflection of the thrust roller and the adjustable roller bearing and the outer spherical raceway supporting tool is analyzed with the combined bearing of the thrust roller plus the roller and the thrust roller and the thrust roller. The relationship between the deflection angle of the tool spindle and the eccentricity of the inner and outer ring is established. The load distribution of the internal components of the composite bearing is solved by the static statics equilibrium equation of the bearing and the displacement coordination conditions of the internal bearings. On the basis of the statically statically statics equilibrium equation, the working speed of the hole trajectory control tool is considered, and the roller centrifugal force and the torques in the conventional calculation are set as static loads in the conventional calculation. The semi space method is used to solve the contact and sliding problems of roller and raceway Hertz in the static load setting of composite bearings. The quasi static equilibrium equation of the combined bearing is established, which mainly includes four aspects of roller load, roller torque, raceway load and raceway resistance moment. The concrete structure of the tool and the combined bearing and the bearing displacement coordination are considered. The influence of radial load, axial pretension, spindle deflection angle, rotation speed and eccentricity of inner and outer ring on the stress and radial displacement of composite bearings is studied, and the maximum von Mises stress of the combined bearing is located in the radial load direction of the left push roller and the raceway. On the surface, the environment temperature is higher for the 362.86MPa. well trajectory control tool. This paper studies the relationship between the composite bearing and the bearing roller and the raceway, and establishes the thermal coupling analysis model of the combined bearing. The combined bearing stress is solved under the conditions of 50, 100 and 150 degrees centigrade temperature respectively. And the distribution of the temperature field, the maximum temperature region of the composite bearing is distributed on the contact surface of the roller bearing in the direction of radial load. The maximum von Mises stress of the composite bearing increases with the increase of the ambient temperature, which is 415.05MPa (50), 509.04MPa (100), 629.74MPa (150), and the radial displacement is with the ambient temperature. The degree is reduced, which is 5.16 mu m (50 C), 5.04 mu m (100 C) and 4.91 mu m (150 C). Using the test control system of well trajectory control tools and tools, the orthogonal experimental scheme of rotating speed, deflection angle and eccentricity of inner and outer rings on the radial displacement of combined bearing is designed by using the test control system of well trajectory control tools and tools. The orthogonal experiment is designed for 216 times. The effect of eccentricity on the radial displacement of composite bearings is the greatest, which is the same as the trend of the finite element analysis. Based on the Lundberg-Palamgren fatigue life theory of single bearing and the Ioannides-Harris fatigue life theory, the fatigue life of the combined bearing L-P of the combined bearing theorem is proposed. The empirical formula, as well as the I-H fatigue life calculation method which combines the results of thermal coupling analysis and the actual working condition, has established the IH fatigue life analysis model of the composite bearing. By comparing the two methods with the results of the combined bearing life test, it is found that the fatigue life calculation method of the combined bearing I-H is more practical, and can be used for the fatigue of the same kind of composite bearings. Work life calculation.

【學(xué)位授予單位】：長(zhǎng)江大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE92

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