本文選題：油管螺紋 + 粘扣　； 參考：《長春理工大學(xué)》2015年碩士論文

【摘要】：粘扣是油管螺紋的主要失效形式之一,而石油生產(chǎn)全過程中所應(yīng)用的各類管件(油管、套管、輸油管等)均采用螺紋聯(lián)接,因此,解決油管的粘扣問題,一直是石油管件生產(chǎn)中的熱門話題。本文從油管螺紋粘扣的機(jī)理入手將貝殼表面溝槽狀仿生非光滑結(jié)構(gòu)的耐磨特點(diǎn)應(yīng)用在油管螺紋上以達(dá)到抗粘扣的目的。利用有限元仿真的方法對普通油管螺紋、仿生非光滑溝槽結(jié)構(gòu)油管螺紋在擰緊力矩作用下與軸向力作用下的齒面載荷分布進(jìn)行模擬。結(jié)果表明,仿生油管螺紋表面接觸應(yīng)力全面低于普通螺紋,有效地減小了螺紋表面應(yīng)力集中現(xiàn)象。為了得到理想的仿生抗粘扣螺紋,采用激光加工的手段,運(yùn)用合理地工藝方法將貝殼表面的溝槽結(jié)構(gòu)加工在油管螺紋表面。通過對未加工仿生結(jié)構(gòu)的普通螺紋試件、“0.5mm×0.4mm仿生溝槽結(jié)構(gòu)單元”油管螺紋試件、“0.5mm×0.8mm仿生溝槽結(jié)構(gòu)單元”油管螺紋試件在實(shí)際工況下進(jìn)行擰接試驗(yàn)。結(jié)果表明,在相同條件下,“0.5mm×0.4mm仿生溝槽結(jié)構(gòu)單元”油管螺紋試件所需擰緊扭矩相較于普通螺紋降低5.15%,擰接次數(shù)增加2次,“0.5mm×0.8mm仿生結(jié)構(gòu)單元”油管螺紋試件所需擰緊扭矩相較于普通螺紋降低9.06%,擰接次數(shù)多3次,仿生溝槽結(jié)構(gòu)顯著提高了油管螺紋抗粘扣性能。面積大的仿生溝槽結(jié)構(gòu)油管螺紋相較于面積小的仿生溝槽結(jié)構(gòu)油管螺紋擰緊力矩減小4.03%,擰接次數(shù)多1次,抗粘扣性能更佳。
[Abstract]:Adhesive buckling is one of the main failure forms of tubing thread, and all kinds of pipe fittings (tubing, casing, oil pipeline, etc.) used in the whole process of oil production are threaded, so the problem of tubing sticking is solved. It has always been a hot topic in the production of oil pipe fittings. In this paper, based on the mechanism of tubing thread adhesion, the wear resistance characteristics of the grooved non-smooth structure on the shell surface are applied to the tubing thread in order to achieve the purpose of anti-adhesive buckling. The finite element simulation method is used to simulate the tooth surface load distribution of the common tubing thread and the bionic non-smooth groove structure tubing thread under the action of tightening torque and axial force. The results show that the contact stress on the thread surface of the bionic tubing is lower than that of the common thread, which effectively reduces the stress concentration on the thread surface. In order to obtain ideal biomimetic anti-adhesion thread, the groove structure of shell surface is processed on the surface of tubing thread by means of laser processing and reasonable processing method. 0.5mm 脳 0.4mm bionic groove structure unit "tubing thread specimen" and "0.5mm 脳 0.8mm bionic groove structure unit" tube-threaded specimen were tested under actual working conditions by means of unmachined normal threaded specimens with biomimetic structure, "0.5mm 脳 0.4mm bionic groove structure unit" and "0.5mm 脳 0.8mm bionic groove structure unit". The results show that, under the same conditions, the tightening torque of the "0.5mm 脳 0.4mm bionic groove structure unit" tubing thread specimen is 5.15 less than that of the common thread, and the twisting times increase by 2 times. The tightening torque of "0.5mm 脳 0.8mm Bionic structural Unit" tubing thread specimen is 9.06 lower than that of ordinary thread, and the number of twisting is more than 3 times. The bionic groove structure obviously improves the anti-sticking and buckling performance of tubing thread. Compared with the small area bionic grooves, the screw thread of bionic grooves with large area decreases 4.03 points of tightening torque, the number of twisting times is more than one time, and the performance of anti-adhesion buckle is better than that of bionic grooves with small area.
【學(xué)位授予單位】：長春理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE931.2

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