Graphite sealing structure and sealing damping method
By using annular protrusions and inner grooves to form an irregular dynamic sealing surface in the graphite sealing structure, and integrating wave springs to absorb vibration energy, the problems of poor sealing effect and vibration are solved, realizing an integrated design of efficient sealing and vibration reduction, and improving the operational reliability and life of aero-engines.
CN122407299APending Publication Date: 2026-07-17AVIC GUIYANG ENGINE DESIGN & RES INST
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- AVIC GUIYANG ENGINE DESIGN & RES INST
- Filing Date
- 2026-04-27
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing graphite sealing structures are ineffective under high pressure differential, large vibration and strong backflow conditions, and cannot effectively absorb and attenuate rotor axial vibration, leading to increased leakage and wear.
Method used
The annular protrusion and inner groove form an irregular radial dynamic sealing surface, and a wave spring is integrated to absorb vibration energy. Combined with anti-rotation pin and circumferential tension spring to provide preload, the sealing and vibration reduction are integrated.
Benefits of technology
It significantly improves sealing performance, suppresses leakage and backflow, reduces the impact of vibration, extends seal life, simplifies structure, and reduces weight.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122407299A_ABST
Abstract
本发明涉及航空发动机技术领域，尤其涉及一种石墨密封结构及密封减振方法，该结构包括跑道、石墨密封环、壳体、周向拉伸弹簧、挡圈、多个弹簧以及波形弹簧。跑道外径环面上设有环形凸起，石墨密封环内径环面设有与之互补的内凹槽，两者配合形成径向接触的异形动密封面；周向拉伸弹簧提供径向抱紧力，多个弹簧提供轴向推力形成端面静密封。特别地，在壳体右端面与固支结构之间设置有始终处于压缩状态的波形弹簧，该波形弹簧在吸收转子轴向振动的同时，对壳体形成向左推力，使石墨密封环的第二型面紧靠在跑道的第一型面上，强化了动密封效果，实现了密封与轴向减振的一体化功能。
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