桥塞中金属密封套筒裂纹分析与优化  

Crack analysis and optimization of the metal-to-metal seal sleeve in bridge plug

作　　者：王志坚[1] 马震[1] 张士宏[2] 陈岩[2] 徐勇[2] 陈大勇[2] 尚晓峰[1] 

机构地区：[1]沈阳航空航天大学机电工程学院,辽宁沈阳110136 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《塑性工程学报》2017年第3期191-196,共6页Journal of Plasticity Engineering

基　　金：省院科技合作高新技术产业化专项资金:深井专用金属密封件研发及示范应用(2015SYHZ0018)

摘　　要：基于一种金属对金属密封套筒结构内侧翻转直角槽和薄壁圆弧内缘根部的裂纹缺陷,采用试验和模拟相结合的方式,分析裂纹产生的原因。以翻转直角槽过渡圆角和薄壁圆弧内缘根部过渡圆角的大小为设计变量,通过构建数学优化模型,得出最佳数值,并对优化结果进行验证。结果表明,翻转直角槽过渡圆角取1.5 mm、薄壁圆弧内缘根部过渡圆角取3.0 mm时,翻转直角槽的最大等效塑性应变为0.31142、薄壁圆弧内缘根部的最大等效塑性应变为0.105129、薄壁圆弧处接触应力最大值可以达到1401.61 MPa,坐封后金属密封件密封性能稳定良好,没有出现裂纹缺陷。Based on a metal-to-metal sealing sleeve structure, in which the rectangular slot and thin-walled arc inner root were cracked, the cause of the cracks was analyzed by the combination of experiment and simulation. By using the transition fillets of the rectangular slot and thin-walled arc inner root as design variables, the mathematical optimization model was established, and the most reasonable value was obtained. The optimization results were verified. Result shows that when the transition fillet of the rectangular slot is 1.5 mm and the transition fillet of the thin-walled arc inner root is 3.0 mm, the maximum equivalent plastic strain of the rectangular slot is 0. 31142, the maximum equivalent plastic strain of the thin-walled arc inner root is 0. 105129, the maximum contact stress of the thin wall arc can reach 1401.61 MPa, and the seal ability of metal seal part is stable without observation of cracks after being set.

关 键 词：桥塞 金属密封套筒 裂纹 

分 类 号：TE931[石油与天然气工程—石油机械设备]