挤压油膜阻尼器及包括其的航空发动机
By designing an inner oil film ring, an outer oil film ring, and a return valve in the squeeze oil film damper, the lubricating oil is automatically discharged after the engine stops, solving the problem of lubricating oil coking, maintaining the damper's vibration reduction performance, and ensuring the safe operation of the engine.
CN115992739BActive Publication Date: 2026-07-17AECC COMML AIRCRAFT ENGINE CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AECC COMML AIRCRAFT ENGINE CO LTD
- Filing Date
- 2021-10-20
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
After the engine stops, the lubricating oil in the squeeze film damper is prone to coking due to high temperature, which leads to a decrease in the damper's vibration reduction performance and affects the engine's operating safety.
Method used
Design a squeeze oil film damper, comprising an inner oil film ring, an outer oil film ring, and a return oil valve, which discharges lubricating oil by opening the return oil valve when the engine is stopped, thereby preventing the lubricating oil from coking.
Benefits of technology
It effectively prevents lubricating oil from coking at high temperatures, maintains the damper's vibration reduction performance, reduces engine vibration, and ensures safe operation.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN115992739B_ABST
Abstract
本发明提供了一种挤压油膜阻尼器及包括其的航空发动机，所述的挤压油膜阻尼器：油膜内环，所述油膜内环用于贴合轴承外环；油膜外环，所述油膜外环的内侧套设于油膜内环的外侧，所述油膜外环与所述油膜内环间存在径向间隙以容纳挤压油膜层；回油阀，所述回油阀设置于所述油膜外环的下端；所述回油阀与所述径向间隙相连通，所述回油阀在发动机工作时关闭，在发动机停机时打开。通过本发明的设置，所述挤压油膜阻尼器内部的滑油在发动机停机后被排出。当所述挤压油膜阻尼器于发动机停机后逐渐升温时，其中不再具有可发生结焦的滑油，从而从根本上解决了滑油的高温结焦问题。
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