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海底管道连接器密封环密封性能有限元分析
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国家重点研发计划项目(2016YFC0802105;2016YFC0802306)


Finite Element Analysis of Sealing Performance of Submarine Pipe Connector Seal Ring
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    摘要:

    海底管道连接器中金属密封环需具备良好的回弹特性并提供稳定可靠的接触载荷,才能保证有效密封。而对于复杂的非线性结构,因不能预知密封环预紧安装后的形变,针对其进行理论计算难度大且易产生误差。为研究连接器中金属密封环的接触性能和回弹性能,借助有限元软件Abaqus建立连接器中密封结构的二维轴对称模型,分析初始压缩率对不同径厚比密封环密封性能的影响。以密封环应力状态、压缩回弹量、接触应力依次表征其损伤情况、回弹特性及密封可靠性,并结合三者与初始压缩率的关系,确定预紧安装过程中压缩率的可行性区间。结果表明:密封环损伤易发生于密封环椭圆截面长半轴端点两侧;随着初始压缩率增大,压缩回弹量先增大后减小,薄壁密封环的回弹性能优于同外径的厚壁密封环;薄壁密封环对应初始压缩率的可行性区间远大于同外径的厚壁密封环,证明薄壁密封环密封性能优于厚壁密封环。该结论为密封环选型及预紧安装提供了相关依据。

    Abstract:

    In order to ensure effective sealing,the metal sealing ring in the submarine pipe connector must have good rebound characteristics and provide stable and reliable contact load.However,for the complex nonlinear structure,the deformation after pretightening installation cannot be predicted,it is difficult to achieve the theoretical calculation of the metal sealing ring and the error is easy to occur.In order to study the contact performance and rebound performance of metal sealing ring in connector,the twodimensional axisymmetric model of the sealing structure in the connector was established by the finite element software Abaqus,the influence of the initial compression ratio on the sealing performance of the seal rings with different diameterthickness ratio was analyzed.The damage condition,rebound characteristics and sealing reliability of the seal rings were characterized respectively by the stress state,the amount of compression rebound and the contact stress of the seal rings,and the feasibility interval of the compression ratio during the pretightening installation process was determined according to the relationship between the three and the initial compression ratio.The results show that the damage of the seal rings are likely to occur on both sides of the long semiaxis end of the elliptical section of the seal rings.With the increase of the initial compression ratio,the rebound amount of the seal rings is increased first and then decreased,and the rebound characteristics of the thinwalled seal ring is better than that of the thick walled seal ring with the same outer diameter.The feasibility interval of the thinwalled seal ring corresponding to the initial compression ratio is larger than that of the thickwalled seal ring with same outer diameter,which proves that the thinwalled seal rings have better sealing performance.The conclusion provides relevant basis for the selection and pretightening of the sealing ring.

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王 凯,曹宇光,孙永泰,史永晋,杨 光.海底管道连接器密封环密封性能有限元分析[J].润滑与密封,2020,45(8):53-60.
WANG Kai, CAO Yuguang, SUN Yongtai, SHI Yongjin, YANG Guang. Finite Element Analysis of Sealing Performance of Submarine Pipe Connector Seal Ring[J]. Lubrication Engineering,2020,45(8):53-60.

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  • 在线发布日期: 2020-10-15
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