C形密封环密封特性数值计算方法研究

Study on Numerical Simulation for Sealing Behavior of C-Ring

建立较精确的C形密封环三维有限元模型,考虑弹塑性-接触耦合问题,利用ANSYS对其进行数值计算,并分析其密封特性。通过研究,获得了C形密封环的压缩-回弹特性曲线,与试验结果符合良好,验证了数值计算方法的正确性。压缩状态下应力在弹簧基体的0°、90°、180°和270°区域分布较大;回弹状态下,中间层和银层产生翘曲使得包覆层开口变大;各层结构间的相互作用对C形密封环的密封特性具有明显的影响。

In this paper, a relatively authentic three-dimensional finite element model of C-ring is established. The sealing behavior of C-ring is simulated by ANSYS while the coupling of elastoplasticity and contact is taken into consideration. With the numerical simulation, the compression-springback characteristic curve of C-ring is obtained. As the characteristic curves are coincident with test results, the validity of the numerical simulation method is confirmed. In the compression state, the stress in the spring is higher at the 0°, 90°,180° and 270° regions. In the springback state, the linings will warp to make the gap of linings be wider. The interaction of each part of C-ring will influence the sealing behavior obviously.