可控弯接头变异万向轴和轴承的强度模拟分析

Strength Simulation Analysis of the Variation Cardan Shaft and Bearing on Controllable Bent Sub

为了促进我国旋转导向钻井技术发展,对智能型井下闭环旋转导向工具——可控弯接头的结构和工作原理进行了介绍,并用ANSYS软件对旋转导向钻井工具中的变异万向轴和推力轴承进行了研究,分析了推力轴承、滚子和变异万向轴的相互作用及应力分布情况。分析结果表明,接触配合中危险区域的最大应力为234 MPa,发生在轴承上与滚子接触的球窝边缘部分,与赫兹理论相符;变异万向轴和推力轴承都能较好地满足强度要求。

To advance the development of domestic rotary steering drilling technology, the structure and oper- ating principle of intelligent dnwnhole closed-loop rotary steering tool, namely tire controllable henl sub, were intro- duced. The A NSYS software was used to study the variation cardan shaft and thrust bearing in rotary steering drilling tools. The interaction and stress distribution of thrust bearing, roller and variation cardan shaft were analyzed. The a- nalysis shows that the maximum stress of the dangerous zone is 234 MPa in contact operation, taking place on the bearing and lhe ball-and-socket edge contacting the roller. This is in agreement with Hertz theory. Both variation cardan shaft and thrust bearing satisfy the strength requirement desirably.