Design method of double flap check valve for aircraft

By optimizing the dynamics and fluid dynamics of the double-lobe check valve, the problems of sealing and fatigue failure under high temperature and high pressure environments were solved, resulting in a lightweight and highly reliable double-lobe check valve for aircraft.

CN120745096BActive Publication Date: 2025-11-07成都裕鸢航空智能制造股份有限公司 +1
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Patent Information

Application Number
CN202511271211.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-09-08
Publication Date
2025-11-07
Estimated Expiration
2045-09-08

AI Technical Summary

Technical Problem

Existing one-way valves for aero engines suffer from insufficient sealing, structural fatigue failure, and excessive weight under high temperature, high pressure, and high frequency vibration environments, making it difficult to meet the requirements for high reliability and long service life.

Method used

By conducting dynamic analysis, fluid dynamics simulation, and material optimization on the double-disc check valve, we designed unequal weight dynamic balance, stop device, and flow channel structure. We adopted corrosion-resistant treatment and lightweight manufacturing process, and optimized the assembly and sealing surface design of the valve body and valve disc to ensure rapid valve disc response and low wear.

Benefits of technology

It achieves improved sealing performance and response speed, reduced wear rate, increased leakage rate and fatigue life while reducing weight, and meets the reliability requirements under high temperature and high pressure environments.

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Abstract

The application discloses a design method of a double-flap check valve for an airplane. Through a series, flow, and theoretical data design method, based on the working condition of the double-flap check valve and the index to be achieved, the double-flap check valve is subjected to series modification and optimization of structure, dynamic balance, material strength, and flow channel structure, so that the weight, structure, and strength of the double-flap check valve can be optimized, and the strength, sealing performance, and response speed of the double-flap check valve are ensured on the premise of simplifying the structure of the double-flap check valve and reducing the weight of the double-flap check valve.
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