方钻杆旋塞阀的三维有限元接触分析  

Three-dimensional Finite Element Contact Analysis of Kelly Cock Valve

作　　者：张彤林 曹向利[1] 曲成[1] 

机构地区：[1]中国石油冀东油田公司勘探开发建设项目部

出　　处：《石油机械》2012年第7期25-28,共4页China Petroleum Machinery

基　　金：国家油气重大专项"深水钻井工程设计关键技术研究"(2008ZX05026-001-01)

摘　　要：为了对方钻杆旋塞阀的旋钮、十字拨块和球阀之间的互作用情况进行分析,找出旋钮和十字拨块的应力薄弱点,建立了旋钮、十字拨块和球阀的三维有限元模型。采用C3D4单元对模型进行网格划分,限制球阀底端截面的所有自由度,限制旋钮和十字拨块X方向的移动和Y、Z方向的转动自由度,扭矩通过旋钮内六方孔中心上方的耦合点施加在旋钮内六方孔上。分析结果表明,十字拨块在旋转方向一侧的外侧边缘处应力最大,且应力最大处与十字拨块的失效位置相同;十字拨块的变形状态与失效后的塑性变形相同。To make an analysis of the interaction between the knob,cross piece and ball valve of kelly cock valve and to find out the stress weak point of the knob and cross piece,the three-dimensional finite element model of the knob,cross piece and ball valve was established.The C3D4 unit was adopted to conduct a mesh generation of the model,restricting all the degree of freedom of the cross section at the bottom of the ball valve as well as the movement in the X direction of the knob and cross piece and the rotating degree of freedom in their Y and Z directions.The torque was imposed on the hexagonal hole within the knob through the coupling point above the center of the hexagonal hole within the knob.The analysis shows that the maximum stress occurs on the edge of the outer side in the rotating direction of the cross piece and the position of the maximum stress remains the same as that of failure.The deformation state of the cross piece is the same as the plastic deformation after failure.

关 键 词：方钻杆 旋塞阀 十字拨块 球阀 接触分析 失效形式 

分 类 号：TE921[石油与天然气工程—石油机械设备]