Abstract:Aimed at the sealing problem of the connecting structure of a highpressure rotor of an engine,a U-shaped metal seal ring was designed.The sealing and strength performance of the seal ring were analyzed and studied.The influence of structural parameters,such as root circle,wall thickness,ring height,curvature radius of contact surface,contact surface angle of sealing ring and seal ring fitting angle on the maximum equivalent stress and the maximum contact stress of the seal ring was explored.Based on the optimization design module of ANSYS Workbench,the optimization technology of agent model and genetic algorithm was used to optimize the structure of the seal ring.The results show that the sealing and strength requirements can be guaranteed when the installation compression ratio ranges from 3.56% to 6.33% under the installation and operation conditions.The maximum equivalent stress is directly proportional to the wall thickness,but inversely proportional to the root circle and ring height.The curvature radius of the contact surface has little effect on the maximum equivalent stress,while the maximum contact stress is increased with the increase of the curvature radius of the contact surface.When choosing the appropriate angle range,the angle of the contact surface and the angle of the mating part of the sealing ring have little influence on the maximum equivalent stress and the maximum contact stress.After optimization,the equivalent stress of the sealing ring under the installation and operation conditions is reduced by 34.3% and 30.4% respectively.The mass of the sealing ring is reduced by 6.1%.The designed U-shaped metal seal ring was tested with the whole machine.The results show that the sealing performance of the U-shaped metal seal ring is good,which verifies the rationality of the design.
