A split connection structure of an engine thrust joint and a torque mounting joint

By using a separate connection structure between the engine thrust joint and the torque mounting section, the problems of complex load path coupling, weight penalty, and maintenance complexity in traditional integrated designs are solved. This achieves load path decoupling, weight reduction, and modular upgrades, thereby improving the maintainability and reliability of the aero-engine connection structure.

CN121973939BActive Publication Date: 2026-07-24AVIC SAC COMML AIRCRAFT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AVIC SAC COMML AIRCRAFT
Filing Date
2026-04-01
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The traditional integrated design of the rear-mounted section of the engine in current aircraft results in complex load path coupling, difficulty in analyzing composite stress, easy fatigue cracking, design weight penalty, complex maintenance, sensitivity to manufacturing and assembly errors, and lack of modular upgrade flexibility.

Method used

It adopts a split connection structure of engine thrust joint and torque mounting section, and achieves load path decoupling through independent thrust transmission system and torque balancing system. It utilizes carbon fiber composite material and titanium alloy structure, combined with adjustable thrust rod and redundant connection to achieve functional decoupling and structural optimization.

Benefits of technology

It achieves a clear and defined load path, significantly reduces weight, improves maintainability and reliability, reduces assembly stress sensitivity, provides modular upgrade flexibility, simplifies maintenance processes, and improves structural efficiency and safety.

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Abstract

The application belongs to the technical field of aero-engine mounting structure design, and particularly relates to a split type connecting structure of an engine thrust joint and a torque mounting joint, and especially to a split type design which completely decouples the engine thrust transmission function and the torque and moment balance function in structure. The thrust transmission function and the torque balance function are completely separated, the problems of complex load path, large structure weight and poor maintainability of a traditional integrated engine rear mounting joint are solved, the split type connecting structure has the advantages of clear force transmission path, structure optimization and weight reduction, convenient maintenance, high reliability and the like, and is particularly suitable for the installation of a modern high-bypass-ratio turbofan engine.
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Citation Information

Patent Citations

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    CN118025483A

  • Multi-flow turbojet-engine i.e. turbofan engine, suspension for airplane, has rear fixation unit with connection unit that fixes case and strut, where rear and front fixation units respectively transmit vertical / lateral and torque efforts

    FR2921341A1

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    US20050067528A1

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