發(fā)布時(shí)間：2018-01-05 07:06

  本文關(guān)鍵詞：渦輪鉆具葉片的逆向分析及流場(chǎng)仿真研究　出處：《西南石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 渦輪定轉(zhuǎn)子葉片 逆向工程 三坐標(biāo)測(cè)量 誤差評(píng)定 流場(chǎng)仿真

【摘要】：渦輪鉆具中主要部件是由渦輪定子和轉(zhuǎn)子組成的渦輪,它的作用是把液體能轉(zhuǎn)化為主軸上的機(jī)械能。渦輪定轉(zhuǎn)子葉片的形狀制約著鉆井液在渦輪中的流動(dòng)狀態(tài),進(jìn)而直接影響渦輪鉆具的性能。渦輪葉片的表面為復(fù)雜的自由曲面,各研究單位和生產(chǎn)企業(yè)對(duì)該曲面幾何參數(shù)均嚴(yán)格保密。如何快速掌握現(xiàn)場(chǎng)應(yīng)用高性能葉片的關(guān)鍵技術(shù)并進(jìn)行改進(jìn)設(shè)計(jì),是現(xiàn)階段亟待解決的問題。逆向工程是根據(jù)已經(jīng)存在的產(chǎn)品,快速消化吸收先進(jìn)技術(shù)。因此,應(yīng)用逆向工程技術(shù)來設(shè)計(jì)渦輪葉片對(duì)提高渦輪鉆具的水力性能有重要的意義。 本文以現(xiàn)場(chǎng)應(yīng)用的渦輪鉆具葉片為研究對(duì)象,借助于三坐標(biāo)測(cè)量機(jī)和相關(guān)軟件實(shí)現(xiàn)渦輪定轉(zhuǎn)子葉片的逆向設(shè)計(jì),研究的主要內(nèi)容包括： (1)分析渦輪鉆具葉片的特征,選擇接觸式測(cè)量方法,規(guī)劃測(cè)量路徑,使用三坐標(biāo)測(cè)量機(jī)測(cè)量葉片曲面,獲得8條截面線點(diǎn)云數(shù)據(jù)；學(xué)習(xí)Imageware逆向工程軟件的使用方法,對(duì)點(diǎn)云分別進(jìn)行點(diǎn)云濾波、點(diǎn)云對(duì)齊和點(diǎn)云分割處理。 (2)研究自由曲線曲面數(shù)學(xué)模型,用曲線擬合造型方法和點(diǎn)云直接擬合造型方法擬合曲面,將得到的6個(gè)曲面拼接成完整渦輪鉆具定轉(zhuǎn)子三維模型,使用UG軟件對(duì)模型進(jìn)行實(shí)體化操作,最終得到完整渦輪鉆具轉(zhuǎn)子實(shí)體模型；對(duì)該實(shí)體進(jìn)行曲面光順檢查并建立誤差評(píng)定量化指標(biāo)。 (3)研究流體在渦輪鉆具中流動(dòng)的數(shù)學(xué)模型,使用UG軟件建立渦輪鉆具定轉(zhuǎn)子流域的周期模型,用CFD軟件對(duì)模型進(jìn)行網(wǎng)格劃分、設(shè)置邊界條件和流場(chǎng)仿真操作,得到27三/s的恒定流量下渦輪定轉(zhuǎn)子內(nèi)流場(chǎng)壓力和速度分布的基本規(guī)律,分析比較不同轉(zhuǎn)速下轉(zhuǎn)子葉片上壓力變化,進(jìn)行渦輪鉆具試驗(yàn),將試驗(yàn)得到的水力參數(shù)與模擬的水力參數(shù)進(jìn)行對(duì)比,驗(yàn)證逆向工程技術(shù)設(shè)計(jì)渦輪鉆具葉片的可行性。
[Abstract]:The main component of a turbine drill tool is a turbine composed of a turbine stator and a rotor, whose function is to convert liquid energy into mechanical energy on the spindle. The shape of the turbine stator and rotor blade restricts the flow of the drilling fluid in the turbine. The surface of the turbine blade is a complex free-form surface. The geometric parameters of the surface are strictly kept secret by all research units and production enterprises. How to quickly master the key technology of field application of high performance blade and improve the design. Reverse engineering is based on existing products, rapid digestion and absorption of advanced technology. Using reverse engineering technology to design turbine blades is of great significance to improve the hydraulic performance of turbine drilling tools. In this paper, the turbine blade applied in the field is taken as the research object, and the reverse design of turbine stator rotor blade is realized by means of CMM and related software. The main contents of the research include: 1) analyzing the characteristics of turbine drill blade, selecting contact measuring method, planning measuring path, measuring blade surface with CMM, obtaining 8 cross section line point cloud data; Learning the use of Imageware reverse engineering software, point cloud filtering, point cloud alignment and point cloud segmentation are carried out respectively. (2) the mathematical model of free curve and surface is studied. The curve fitting modeling method and point cloud fitting modeling method are used to fit the surface, and the 6 surfaces are spliced into the complete turbine drilling tool stator and rotor 3D model. Using UG software to carry on the entity operation to the model, finally get the complete turbine drilling tool rotor solid model; The surface fairing of the entity is carried out and the quantitative index of error evaluation is established. Thirdly, the mathematical model of fluid flow in turbine drilling tools is studied. The periodic model of stator and rotor basin of turbine drilling tool is established by UG software, and the model is meshed with CFD software. By setting boundary conditions and flow field simulation operation, the basic law of pressure and velocity distribution in turbine stator rotor is obtained at 27 / 3 / s constant flow rate, and the pressure variation on rotor blade under different rotational speeds is analyzed and compared. The hydraulic parameters obtained from the test are compared with the simulated hydraulic parameters to verify the feasibility of the reverse engineering technology for the design of turbine drill tool blades.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE921.2

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