Study on sealing performance of permanent metal extrusion joint pipeline connector
In order to study the sealing performance of the permanent metal extrusion joint connector,a study was conducted on the influence of different extrusion amounts on the sealing performance of the aviation pipeline connector.The connection model of 6061 joint body,7075 extrusion ring and 6061 conduit was established,and the judgment conditions for effective sealing of conduit were proposed.By simulating the extrusion molding process of different extrusion amounts with finite ele-ment,the maximum and minimum contact stress and plastic deformation between the joint body,extrusion ring and conduit were analyzed under different extrusion amounts during the extrusion process.The sealing performance comparison tests were conducted with unilateral relative extrusion amount of 0.8 mm and 1mm.The experiments verified the accuracy of model es-tablishment and finite element simulation.The results showed that the increase of unilateral extrusion amount enhanced the sealing performance and connection strength of parts;the joint body mainly underwent plastic deformation,while the catheter and extrusion ring mainly underwent elastic deformation;the internal sealing tooth 2 of the joint body played the main seal-ing role,the sealing tooth 3 played the secondary role,and the sealing tooth 1 had anti-pull-off effect.
metal extrusion jointsunilateral relative extrusion amountfinite element simulationcontact stresstightness
万方数据
维普
