Analysis Of Factors Influencing Performance Of Metal W-ring And Its Optimization Design

Along with the rapid development of aero-engine technology,new modern metal sealing technology has come into being.As one of the sealing components of metal sealing technology,the elastic metal seal ring,with its good compressive resilience and sealing effect,has gradually appeared in the field of aviation at home and abroad,and has been applied in several key components of the aero-engine,becoming an indispensable part in evaluating the efficiency and overall reliability of the aero-engine.Therefore,the research and development of high performance metal sealing rings is of strategic importance.To address the problem of inadequate performance of a metal W-ring,the purpose of this paper is to analyse the factors influencing the performance and optimise the design of the structure of it,establish a finite element model of the metal W-ring,complete the finite element simulation under normal and high temperature conditions,analyse the influence of temperature and structural parameters on its performance,carry out the optimisation of the design of the structure,and the high temperature test is able to confirm the improvement of comprehensive performance.The main content includes the following aspects:(1)Introduction of the design principles and basic mechanical performance requirements of the metal W-ring,and the establishment of a finite element model of the metal W-ring with initial structural parameter values.The finite element simulation of the rebound condition at room temperature is carried out,and the validity of the finite element model of the metal W-ring is confirmed by comparing the simulation results with the real test results.(2)Simulation of the metal W-ring under high temperature conditions by applying the thermal coupling analysis method,the plastic deformation of the metal W-ring during the whole process is calculated under the consideration of creep effect,and the influence of different high temperature conditions on the performance of the metal W-ring is analysed.(3)For different structural parameters,several control schemes with varying structural parameters are designed to analyse the variation tendency of several performance characterization values of metal W-ring,providing ideas and basis for optimising the comprehensive performance of metal W-ring.(4)Four design variables with significant effects on the maximum equivalent force,maximum contact stress,average contact pressure and rebound rate of the metal W-ring are selected.An orthogonal array method is used for the experimental design,a second-order response surface approximation model is established and its accuracy is verified.The multi-objective optimisation design of the structural parameters base on NSGA-II genetic algorithm is verified in high temperature tests,and the plastic deformation rate of metal W-ring is significantly reduced,meeting design requirements.This paper is a comprehensive study of the performance influencing factors,structural optimization design and test of metal W-ring,which has achieved the expected effect of the research,and has certain reference significance for the subsequent research and development of metal W-ring.