工程设计学报2018，Vol.25Issue(2)：167-172,6.DOI:10.3785/j.issn.1006-754X.2018.02.006
单金属密封的结构优化及其密封性能研究
Research on structure optimization and seal performance of single metal seal
摘要
Abstract
In the exploration of oil and gas field,for the instability of the dynamic seal performance because of the complex drilling conditions,the finite element method was used to analyze the con-tact pressure of single metal seal under the working condition which combined with single metal sealing structure and high pressure environment.Then the leakage rate of the single metal seal was calculated by Reynolds equation.On this basis,the optimization of the dynamic seal was completed by orthogonal experiment and F evaluation method with the objective to reduce maxi-mum contact pressure and leakage rate.Finally,the influence of the structure parameters of single metal seal on the contact pressure and leakage rate of the sealing surface was obtained,and the average values of the calculated results of the optimized target corresponding to the same number of levels were calculated.According to the calculated results,the variation trend of the average value for the contact pressure and the leakage rate were obtained to identify the optimal level of seal structure under different levels.The performance of the dynamic seal before and after the optimization was compared using the finite element simulation.According to the seal parame-ters,two sets of seal specimens were processed,and sealing experiment was carried out.Simula-tion and experimental results verified that the inner side of the seal surface was worn seriously under high pressure condition,and the drilling fluid particles were easy to invade the sealing sur-face,also the maximum contact pressure was decreased after optimization.Meanwhile,the maxi-mum temperature and leakage rate of the seal were significantly reduced.The research has impor-tant practical significance to improve the performance of the single metal seal and the reliability of the dow n-hole dynamic seal.关键词
单金属密封/有限元/接触压力/泄漏率/动密封实验Key words
single metal seal/finite element/contact pressure/leakage rate/dynamic seal test分类
机械制造引用本文复制引用
张毅,张晓东,常学平,吴倩..单金属密封的结构优化及其密封性能研究[J].工程设计学报,2018,25(2):167-172,6.基金项目
国家自然科学基金资助项目(51674216) （51674216）
四川省教育厅科研项目(16ZA0062) （16ZA0062）
