海底油气管道维修夹具密封能力影响参数

Affecting Parameters of Sealing Capacity of Subsea Oil and Gas Pipeline Repair Clamp

针对影响夹具密封能力的相关因素开展分析。影响夹具周向密封能力的因素包括密封圈与管道间距离、摩擦因数、分割环与管道间距离。影响夹具轴向密封能力的因素为摩擦因数。基于夹具密封结构,利用有限元软件Abaqus对影响密封能力的因素开展有限元建模及模拟计算,并对模拟计算结果开展分析。摩擦因数、分隔圈与管道间距离、密封圈与管道间距离的增大不利于增强夹具的周向密封能力,设计时可适当减小相关参数。摩擦因数对夹具的轴向密封能力基本没有影响,设计时可忽略摩擦因数对轴向密封的影响。所开展的工作能够为后续海底油气管道夹具密封结构设计和应用提供有益指导。

The relevant factors affecting the sealing capacity of the clamp are analyzed.The factors affecting the circumferential sealing capacity of the clamp include the distance between the sealing ring and the pipe,the friction factor,and the distance between the metal support ring and the pipe.The factor affecting the axial sealing capacity of the clamp is friction factor.Based on the sealing structure of the clamp,the finite element model and simulation calculation of the factors affecting the sealing capacity are carried out by the finite element software Abaqus.The simulation results are analyzed.The increase of the friction factor,the distance between the ring and the pipe,and the distance between the seal ring and the pipe is not conducive to enhance the circumferential sealing capacity of the repair clamp.The relevant parameters can be appropriately reduced during the design.The friction factor is of little effect on the axial sealing capacity of the repair clamp,and the influence of the friction factor on the axial sealing can be ignored in the design.The work can provide useful guidance for the design and application of clamp sealing structure.