發(fā)布時(shí)間：2018-08-20 15:43

【摘要】：石油作為工業(yè)發(fā)展的血液,不僅是動力燃料的來源,其提煉物更是深入到我們生活的方方面面。隨著開采深度的加深,鉆井難度的加大,要求螺桿鉆具性能更高,螺桿鉆具設(shè)計(jì)的好壞影響著鉆探工作的效率及水平。因此螺桿鉆具投入鉆井工作前,需要進(jìn)行性能參數(shù)檢測,一般是在螺桿鉆具試驗(yàn)臺上進(jìn)行的。本文采用的螺桿鉆具及其試驗(yàn)臺來源于企業(yè),采用有限元分析軟件ANSYS作為分析平臺,在已有分析實(shí)例的基礎(chǔ)上,對螺桿鉆具進(jìn)行流固耦合計(jì)算和模態(tài)分析。本文主要從兩方面研究螺桿鉆具。第一是通過分析螺桿鉆具的結(jié)構(gòu)特點(diǎn)和工作原理,根據(jù)線型特點(diǎn)建立離散點(diǎn)并通過MATLAB曲線擬合生成螺桿馬達(dá)的線型,構(gòu)建了螺桿馬達(dá)的有限元模型,利用ANSYS對螺桿馬達(dá)進(jìn)行了靜力分析和流固耦合計(jì)算,得到了高壓鉆井液的壓力分布和速度分布規(guī)律,通過分析對螺桿馬達(dá)定子進(jìn)行優(yōu)化。第二是對螺桿馬達(dá)定子進(jìn)行模態(tài)分析,構(gòu)建試驗(yàn)臺機(jī)架有限元模型并進(jìn)行模態(tài)分析,計(jì)算試驗(yàn)臺其他設(shè)備的固有頻率,將螺桿馬達(dá)的固有頻率與其他外激勵(lì)源的頻率進(jìn)行對比,對螺桿馬達(dá)轉(zhuǎn)子進(jìn)行優(yōu)化。通過以上兩方面對螺桿鉆具及其試驗(yàn)臺設(shè)計(jì)研究,得出了螺桿鉆具在試驗(yàn)臺上的優(yōu)化結(jié)果。一方面流固耦合計(jì)算顯示定子襯套的脆弱部位是定子與轉(zhuǎn)子的嚙合處,提出優(yōu)化螺桿馬達(dá)的方法,通過在外徑160mm的襯套減少5mm的厚度進(jìn)行優(yōu)化,優(yōu)化結(jié)果顯示減少5mm后的定子襯套總變形減少,轉(zhuǎn)子的密封壓力增大,密封性得到增強(qiáng);另一方面模態(tài)分析顯示螺桿馬達(dá)轉(zhuǎn)子不會與試驗(yàn)臺及其它激勵(lì)源發(fā)生共振,結(jié)構(gòu)變形小,滿足試驗(yàn)要求。通過對螺桿馬達(dá)轉(zhuǎn)子中心去除直徑40mm的圓柱材料進(jìn)行輕量化設(shè)計(jì),并經(jīng)過分析驗(yàn)證了優(yōu)化后的馬達(dá)轉(zhuǎn)子符合工作要求,提高了螺桿馬達(dá)的性能,為以后的研究改進(jìn)提供了參考。
[Abstract]:Oil, as the blood of industrial development, is not only the source of power fuel, but also its extract into every aspect of our life. With the deepening of mining depth and the increase of drilling difficulty, screw drilling tools are required to have higher performance. The design of screw drilling tools affects the efficiency and level of drilling work. Therefore, it is necessary to test the performance parameters of screw drilling tools before they are put into drilling operation, which is usually carried out on the test bed of screw drilling tools. The screw drill tool and its test-bed are from the enterprise. The finite element analysis software ANSYS is used as the analysis platform. On the basis of the existing analysis examples, the fluid-solid coupling calculation and modal analysis of the screw drill tool are carried out. This paper mainly studies screw drill tool from two aspects. Firstly, by analyzing the structure and working principle of the screw drilling tool, the discrete points are established according to the linear characteristics and the linear shape of the screw motor is generated by MATLAB curve fitting, and the finite element model of the screw motor is constructed. The static analysis and fluid-solid coupling calculation of the screw motor were carried out by using ANSYS. The pressure distribution and velocity distribution of the high pressure drilling fluid were obtained, and the stator of the screw motor was optimized by the analysis. The second is the modal analysis of the stator of the screw motor. The finite element model of the test stand is constructed and the modal analysis is carried out. The natural frequency of other equipments of the test bed is calculated, and the natural frequency of the screw motor is compared with the frequency of other external excitation sources. The rotor of screw motor is optimized. According to the above two aspects, the design of screw drill tool and its test rig are studied, and the optimized results of screw drilling tool on test bench are obtained. On the one hand, the fluid-solid coupling calculation shows that the weak part of the stator bushing is the meshing place between the stator and the rotor. The method of optimizing the screw motor is put forward to optimize the thickness of the 5mm by reducing the thickness of the 5mm in the outer diameter 160mm bushing. The optimization results show that the total deformation of stator bushing is reduced and the sealing pressure of the rotor is increased, and the sealing property is enhanced after the reduction of 5mm. On the other hand, the modal analysis shows that the rotor of the screw motor will not resonate with the test bed and other excitation sources. The deformation of the structure is small and meets the test requirements. Through the lightweight design of cylindrical material for removing diameter 40mm from the rotor center of screw motor, the optimized rotor meets the working requirements and improves the performance of screw motor, which provides a reference for further research and improvement.
【學(xué)位授予單位】：貴州師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE921.2

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