Study On Compression Resilience And Sealing Performance Of Metal W Ring For Aeroengine

As an important part of engine,seals have to face the high temperature,high pressure,strong vibration and other extremely harsh working condition.It play an extremely important role in improving efficiency of the engine and ensuring safety.The static metallic W ring is designed to cope with the conditions of the modern engine.In this paper,the author use theoretical analysis,simulation and experiment study to obtain the mechanical properties,sealing performance and structure optimization of the W ring,provides an important reference for its design and application.The compression-resilience curve,equivalent plastic strain distribution,sealing mechanism,influence of operating parameters on the mechanical and sealing performance were analyzed by using finite elements software ANSYS.Based on the orthogonal design method,obtained the influence of structure parameters on the spring back and sealing performance,the thickness and wave height is the main facto rs for comprehensive performance of W ring by selecting spring back rate and linear load as evaluation index.Established two linear regression equations with linear load and spring back rate as the dependent variables,wall thickness,wave height as independent variables for subsequent optimization analysis.A contact model that combine elastic-plastic contact model with a rough cylinder contacting a flat surface model is presented.The flow factor leakage model is established to analyze the leakage of the sealing ring.The relationship between dimensionless separation height,contact load and leakage is studied.At the end of this paper,the compression resilience curve is obtained by experiment,and the results are compared with the finite element simulat ion results.The self-developed W ring seal experiment table is introduced.The calculation principle of leakage,the structure layout,the parameters and the main components are introduced in detail.