基于贝壳表面仿生油管螺纹抗粘扣性能仿真分析

An Analysis Based on the Anti-galling Performance of Bionic Tubing Thread on the Surface of Shell

粘扣是油管螺纹的主要失效形式之一。针对油管螺纹粘扣的机理,将贝壳表面沟槽状仿生非光滑结构的耐磨特点应用在油管螺纹上以达到抗粘扣的目的。利用有限元仿真的方法对普通油管螺纹、基于贝壳表面结构的仿生沟槽结构油管螺纹在拧紧力矩作用下与轴向力作用下的齿面载荷分布进行模拟分析。结果表明,仿生油管螺纹表面接触应力全面低于普通螺纹,有效地减小了螺纹表面应力集中现象。

Galling is one of the main reasons that caused the malfunction of tubing threads.This paper started with the mechanism of the galling of tubing thread,applying the nonsmoothed and abrasion resistance characteristics of shell surface to tubing thread,in order to achieve anti-galling. A finite element simulation method also conducted to analyze the tooth surface force distribution of ordinary tubing thread and tubing thread with bionic shell trench structure under tightening force and axial force. The results showed that the surface contact stress of bionic tubing thread is less than common tubing thread,which effectively reduced the stress concentration under the surface of helix.