Civil aircraft door pressurization prevention mechanism
By designing the trajectories of the front guide groove, rear guide groove, and drive groove, and the arrangement of the upper crank, connecting rod, and lower crank, the difficulties in opening the aircraft cabin door pressurization prevention mechanism under icing conditions and the problem of sealing strip compression were solved, thus improving opening efficiency and safety.
CN122126436APending Publication Date: 2026-06-02AVIC SAC COMML AIRCRAFT
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- AVIC SAC COMML AIRCRAFT
- Filing Date
- 2026-04-17
- Publication Date
- 2026-06-02
AI Technical Summary
Technical Problem
Existing aircraft door pressurization prevention mechanisms are difficult to open under icing conditions, and the sealing strip is easily jammed or compressed too much, resulting in increased operating force and reduced safety.
Method used
The design incorporates the trajectories of the front guide groove, rear guide groove, and drive groove. Through the arrangement of the upper crank, connecting rod, and lower crank, the designable motion trajectory of the pressurized prevention door is realized, preventing reverse drive and improving ice-breaking efficiency and safety.
Benefits of technology
It enables the pressurized anti-icing door to open quickly under icing conditions, reduces the compression rate of the sealing strip, and improves operating force and safety.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122126436A_ABST
Abstract
This application relates to the field of aircraft door mechanisms, specifically a door pressurization and prevention mechanism applied to aircraft doors, which enables control of the door pressurization and prevention mechanism's movement trajectory. It achieves control over the door's opening and closing movement trajectory, allowing the sealing strip to gradually move away from the door skin during closing. This solves the problem of traditional fixed-axis rotating pressurization and prevention doors where the sealing strip near the rotating shaft is "clamped" or excessively compressed, leading to increased operating force. Simultaneously, through the design of the pressurization and prevention door's opening and closing movement trajectory, the initial opening direction of the door can be rationally selected, achieving higher opening and ice-breaking efficiency and solving the problem of rapid opening under icing conditions. It also prevents the pressurization and prevention door from reversing its driving mechanism, improving safety.
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