Analysis of Sealing Performance of Cylindrical Sealing Structure of Expansion Casing Joint
In order to select a suitable metal seal structure for the expansion casing joint and study the factors affecting the sealing performance of the expansion casing joint,the finite element dis-play dynamic analysis method was used to simulate and analyze the expansion process of the cylin-der seal structure of the constructed casing joint,and the influence law of internal pressure and initial clearance of sealing surface on the sealing performance of the joint was obtained.The results show that the contact force between the sealing contact surfaces after expansion of the cas-ing joint is zero,and the casing has no sealing performance,so it is not suitable for the casing under no load conditions.When the internal pressure is 30 MPa and the initial sealing gap is con-stant,the expanded sealing contact surface of the expansion casing joint has the maximum contact force.In the range of 0～30 MPa,the greater the applied pressure,the greater the contact force between the metal sealing surfaces after expansion,and the higher the sealing performance.The initial clearance of the sealing surface has the greatest influence on the contact force of the sealing contact surface.When the initial clearance of the sealing surface decreases within 0.1～0.4 mm,the contact force of the sealing contact surface gradually increases after casing expansion,and the sealing performance of the cylindrical sealing structure is gradually improved.The analysis results can provide a reference for the optimal design of sealing performance of expansion casing joints.
NETL
NSTL
万方数据
维普
