偏摆角对圆周密封结构特性及泄漏的影响

根据偏摆角圆周密封分析，建立受力模型和有限元分析模型.通过结构分析与热-结构耦合分析，得到了不同偏摆角下主、辅助密封面应力和变形分布规律及泄漏间隙和泄漏量变化规律.主、辅助密封面应力和变形分布均匀，最大应力和最大变形位于凸舌处，主密封面最大变形大于辅助密封面，最大应力和最大变形随偏摆角增加而增大.热-结构耦合分析应力和变形与结构分析分布规律基本一致，但均大于结构分析.主密封面间隙从轴承腔向气腔增大，辅助密封面间隙从中心向两端增大，接头处间隙最大.泄漏量随偏摆角增加而增大.

Effect of Deflection Angles on Structural Characteristics of Circumferential Sealing and Leakage

Based on the circumferential sealing analysis of deflection angles， the force model and the finite element analysis model were established. Through structural analysis and thermo-structural coupling analysis， the distribution of stress and deformation of the main and auxiliary sealing surfaces were obtained under different deflection angles， as well as the variation law of leakage gap and leakage amount. The stress and deformation of the main and auxiliary sealing surfaces are evenly distributed. The maximum stress and maximum deformation are located at the tongue. The maximum deformation of the main sealing surface is larger than that of the auxiliary sealing surface. The maximum stress and maximum deformation increase with the increasing of deflection angles. The thermal-structural coupling analysis stress and deformation are basically consistent with the structural analysis distribution， but they are larger than that in the structural analysis. The gap of the main sealing surface increases from the bearing chamber to the air chamber， and the gap of the auxiliary sealing surface increases from the center to both ends， and the gap at the joint is the largest. The amount of leakage increases with the increasing of deflection angles.