Fan case energy absorption layer, aeroengine, aircraft

By introducing an energy-absorbing layer structure into the fan casing and utilizing the deformation of the support plate and connecting plate to absorb energy, the problem of the honeycomb layer being easily broken is solved, achieving better containment effect and structural lightweighting.

CN117662252BActive Publication Date: 2026-04-14AECC COMML AIRCRAFT ENGINE CO LTD
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Patent Information

Application Number
CN202211042974.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-08-29
Publication Date
2026-04-14
Estimated Expiration
2042-08-29

AI Technical Summary

Technical Problem

Traditional honeycomb layers are prone to breakage in fan casings, have poor containment effect, and cannot effectively absorb the impact energy when fan blades break.

Method used

The fan casing adopts an energy-absorbing layer structure, including an inner ring component, an outer ring component, and an energy-absorbing body. The energy-absorbing body consists of a panel, a support plate, and a connecting plate. The support plate breaks or deforms when the blades impact, and the connecting plate deforms to absorb energy, generating a negative Poisson's ratio effect and enhancing the containment capacity.

Benefits of technology

It effectively absorbs the impact energy when the fan blade breaks, reduces the impact force on the fan casing, enhances the containment capacity, prevents the broken fan blade from penetrating, and has a lightweight and highly reliable structure.

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Abstract

The application discloses a fan case energy absorption layer, an aero-engine and an aircraft. The fan case energy absorption layer is installed on the inner wall of a fan case and comprises an inner ring component and an outer ring component. The inner ring component is arranged away from the inner wall relative to the outer ring component. An energy absorption body is filled between the inner ring component and the outer ring component. The energy absorption body comprises at least one panel. Energy absorption units are distributed along the length direction of the panel between the outer ring component and the panel, between two adjacent panels, and between the panel and the inner ring component. The energy absorption units comprise support plates provided with weak parts and connecting plates. The two ends of the support plates and the two ends of the connecting plates are connected to the panel, the adjacent panel, the inner ring component or the outer ring component. After the blade is broken, the weak part of the support plate is broken or deformed, the connecting plate located on the side of the support plate is gathered to the impact area, the impact energy of the broken fan blade is absorbed, and the containment capacity of the fan case is enhanced.
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