Study On Large Deformation Sealing Behavior Of Quick-opening Structure Wormlike Seals In High Temperature And High Pressure Sintering Furnace

Seal refers to the prevention of flow,solid media leakage to the outside environment or to prevent foreign impurities into the sealing space of a component,is widely used in a variety of industrial process equipment,its structure design is reasonable will directly affect the normal operation of the equipment.Seal ring is a typical seal,domestic and foreign scholars such as O seal ring and other common structure of the seal ring research,but for a variety of special seal mechanical properties of the research is still lacking.The wormlike seal ring is a special shaped seal ring which is specially used in the quick-opening structure of DN1450 pressure sintering furnace.In this paper,considering the large deformation and physical nonlinearity of rubber material,finite element numerical simulation and optimization analysis are carried out for various external factors affecting the sealing performance of the wormlike sealing ring,so as to improve the overall sealing level of the wormlike seal structure and extend the service life of the wormlike sealing ring.Firstly,according to the research objectives and significance of the subject,the production and use conditions of sintering furnace equipment and the sealing principle and service environment of the wormlike seal ring are briefly described.Secondly,the FEM method was used for the nonlinear contact analysis of the wormlike seal ring,and the finite element analysis software ANSYS WORKBENCH 15.0 was used to establish the finite element model of the wormlike ring,and the fracture failure tendency of the wormlike ring wasanalyzed and compared under the parameters of internal pressure,foot warped height,friction coefficient,seal clearance,assembly compression displacement and so on in different systems.The distribution of Von Mises stress,contact stress and contact deformation was calculated by the post-processing module of the software,and the influence factors were systematically optimized and verified,so as to improve the sealing performance of the wormlike ring and extend the remaining service life of the wormlike ring.Finally,according to the sealing principle of the metal-coated composite material and the reinforcing behavior of the sealing ring root,the design of the wormlike sealing ring is improved on the basis of the optimization of external parameters.The improved wormlike sealing ring combines the characteristics of large elasticity and deformation of rubber material with the characteristics of high strength and stiffness of metal material in an organic way.The embedded metal skeleton improves the stiffness of the seal structure on the whole and avoids the risk of the wormlike ring being blown off under the larger system pressure.To continue using the ANSYS finite element software to the improved composite wormlike sealing ring are numerically simulated,the calculation results show that: compared with the initial seal conditions,composite wormlike ring can greatly reduce the Von Mises stress peak value and the maximum rubber extrusion,Its design concept also provides a new idea for the optimal design of the same type of sealing ring.