摘要
运用ANSYS和Pro/E的交互式无缝连接技术,对现行GW194-70BYM型保温保压取心工具的球阀进行了有限元力学分析。分析结果表明,球阀仓的应力和变形数值分析计算结果与实物在40 MPa工作内压下实测数据非常接近;转轴在轴径变化的地方存在着较严重的局部应力集中现象,宜采用渐变过渡连接方式或适当增粗直径的方法进行解决;球阀仓在转轴的支撑处因结构不对称,在左上耳和右上耳部位的局部应力远大于材料抗拉强度极限,出现局部屈服的现象,降低了总体强度,建议增大左上耳和右上耳部位的几何尺寸。该项研究结果对于指导球阀机构的优化设计及提高其工作安全性具有重要意义。
Finite element analysis on the mechanics of the ball valve of the existing GW194 -70BYM type pressure and temperature-preservation coring tool is conducted by adopting the interactive seamless connection technology of ANSYS and Pro/E. The numerical analysis results of stress and deformation of ball valve cabin accord well to the measured results of ball valve cabin under an inner pressure of 40 MPa. The rotary shaft has serious local stress concentration where the shaft diameter changes, and gradual transition connection type or larger diameter are purposed to address the issue. The upper left ear and right ear of ball valve cabin, where shaft is supported, has a local stress that is far greater than the tensile strength limit due to an asymmetric structure, resulting in a local yielding phenomenon, reducing the overall strength of ball valve cabin. Enhanced geometric dimension for the up- per left ear and right ear is recommended. The results of the study could provide guide to the design and optimization of ball valve and the improvement of ball valve safety.
出处
《石油机械》
北大核心
2014年第7期16-19,共4页
China Petroleum Machinery
基金
国家自然科学基金委员会-中国石油天然气集团公司石油化工联合基金资助项目"钻柱托压效应的振动释放机理与特征"(U1262108)
国家自然科学基金项目(51174035
50974023
50874019)
国家科技重大专项"复杂结构井优化设计与控制关键技术"(2011ZX05009-005)
国土资源部深部地质钻探技术重点实验室开放课题"超万米深井全金属螺杆马达的基础研究"(NLSD201215)
关键词
球阀
有限元分析
保温
保压取心
取心工具
ball valve
finite element analysis
temperature-preservation
pressure-preservation coring
coring tool