高速牙轮钻头轴承双金属密封结构优选分析  

Optimization of Bi-metal Seal Structure of High Speed Roller Bit Bearing

作　　者：肖祥[1] 陈波[1] 孙春梅[1] 刘彦秀[1] 许阳双[1] 

机构地区：[1]西南石油大学机电工程学院

出　　处：《石油机械》2014年第10期30-33,共4页China Petroleum Machinery

摘　　要：通过对双金属密封结构进行失效分析,得出失效的主要原因是:密封结构内部支撑角度和倒角半径的大小设计不合理导致弹性元件上的应力过大和应力集中,加速了弹性元件磨损和老化。利用有限元分析软件Workbench分析了O形橡胶圈上最大Mises应力和最大剪切应力在不同支撑角度和倒角半径下的分布情况,并对支撑角度和倒角半径进行了优选。分析结果表明,双金属密封结构的支撑角度和倒角大小对O形橡胶圈的应力影响较大;当支撑角度为15°、倒角半径为0.3 mm时,O形橡胶圈最大Mises应力和最大剪切应力最小,应力集中问题得到解决。The failure analysis on the bi-metal seal structure indicates that the primary causes are the exces- sive stress and stress concentration of elastic component caused by unreasonable internal support angle and chamfer radius of the seal structure, which accelerate wear and aging of elastic element. Finite element analysis software WorkBench is used for analyzing the maximum Mises stress and maximum shear stress distribution on the rubber O- ring under different support angles and chamfer radius. Meanwhile, the support angle and chamfer radius are opti- mized. The results show that the sizes of the support angle and chamfer have great effects on the stress of rubber O- ring. The minimum maximum Mises stress and maximum shear stress could be gained with the support angle of 15°, chamfer radius of 0. 3 mm, thus the stress concentration could be improved.

关 键 词：双金属密封 O形橡胶圈 支撑角度 倒角半径 牙轮钻头 参数优选 

分 类 号：TE921[石油与天然气工程—石油机械设备]