摘要
为探讨深水测试防喷阀的阀座结构和密封副材料对密封性能的影响,考虑O形密封圈和流体静压对密封力的影响,建立深水测试防喷阀密封力学模型,分析在测试作业中的密封力学特性。建立密封结构的有限元模型,分析密封槽位置、密封面宽度、材料弹性模量、摩擦因数对密封比压和密封面上Mises应力的影响规律,并通过理论公式验证分析模型的正确性。研究表明:随着密封槽离密封面距离的减小,密封面中径附近的密封比压和Mises应力均增大,随着密封面宽度的增加密封比压和Mises应力均减小;阀座材料的弹性模量对密封比压和Mises应力的影响很小;随着摩擦因数的增大密封比压减小而Mises应力增大,当摩擦因数超过0.8后对密封比压和Mises应力的影响很小。研究表明,密封槽位置、密封面宽度和摩擦因数能够局部调节密封比压分布和密封面上的Mises应力分布。
In order to investigate the influence of seat structure and sealing pair material on the sealing performance of the deep water test blowout preventer valve,the mechanical model was established by considering the influence of O-ring and hydrostatic pressure on sealing force,and the sealing mechanics characteristics in testing operation were analyzed.The finite element model of the sealing structure was established,and the influence of the position of sealing groove,the width of sealing surface,the elastic modulus of the sealing seat material and the friction coefficient on the contact pressure and Mises stress of the sealing surface was analyzed.The correctness of the analytical model was verified by theoretical formulas.The results show that the contact pressure and Mises stress near the sealing surface diameter are increased with the decrease of the distance between the sealing groove and the sealing surface,the contact pressure and Mises stress are decreased with the increase of the width of sealing face.The elastic modulus of sealing seat material has little effect on the contact pressure and Mises stress.The increase of friction coefficient will cause the increase of Mises stress and the decrease of contact pressure,while the friction coefficient exceeds 0.8,it has little effect on the contact pressure and Mises stress.The following conclusions can be drawn that the position of sealing groove,the width of sealing surface and friction coefficient can locally adjust the distribution of contact pressure and Mises stress on sealing surface.
作者
唐洋
舒将军
李旺
孙鹏
姚佳鑫
何胤
TANG Yang;SHU Jiangjun;LI Wang;SUN Peng;YAO Jiaxin;HE Yin(School of Mechatronic Engineering,Southwest Petroleum University,Chengdu Sichuan 610500,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2020年第6期61-68,共8页
Lubrication Engineering
基金
国家科技重大专项(2016ZX05028-001-006)
国家重点研发计划项目(2018YFC0310201)
博士后创新人才支持计划项目(BX20190292)
四川省科技创新(苗子工程)培育项目(2019090)
西南石油大学起航计划项目(2018QHZ017).
关键词
深水测试
防喷阀
Mises应力
球面密封
deep water test
blowout preventer valve
Mises stress
sphenecal seal
