Aircraft drying metal tube

The drying metal tubes manufactured using 3D printing technology solve the problems of bulky structure, low drying efficiency, and interlayer delamination under vibration in traditional drying metal tubes used in aircraft fluid transport systems, achieving a balance between efficient drying and mechanical properties.

CN224546289UActive Publication Date: 2026-07-24HANGZHOU HANGLI ADDITIVE MFG TECH CO LTD
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Patent Information

Application Number
CN202522104789.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-29
Publication Date
2026-07-24
Estimated Expiration
2035-09-29

AI Technical Summary

Technical Problem

Traditional drying metal pipes in aircraft fluid transport systems suffer from bulky structures, low drying efficiency, poor compatibility with pipelines, and are prone to interlayer delamination, moisture leakage, or structural failure under vibration conditions, failing to balance mechanical performance and drying function.

Method used

A dry metal tube consisting of a functional inner layer, a supporting middle layer, and a protective outer layer is manufactured using 3D printing technology. The functional inner layer is coated with a hydrophilic coating, the supporting middle layer adopts a biomimetic hexagonal grid structure, and the protective outer layer is coated with an anti-oxidation coating. The entire structure is formed by metallurgical bonding, and the layers are bonded together.

Benefits of technology

It improves drying efficiency and reliability, increases moisture adsorption rate by more than 30%, keeps internal humidity stable below 5%, reduces weight by 30%, increases compressive strength by 35%, avoids interlayer delamination and structural failure under vibration environment, and meets the mechanical performance requirements of aircraft.

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Abstract

The utility model belongs to the technical field of aviation fluid conveying components, and particularly relates to an airplane drying metal pipe which comprises a functional inner layer, a supporting middle layer and a protective outer layer which are sequentially arranged from inside to outside, the functional inner layer, the supporting middle layer and the protective outer layer are integrally formed through the 3D printing technology, metallurgical bonding is formed among the layers, and the functional inner layer is a metal layer. The inner wall of the functional inner layer is coated with a hydrophilic coating, and the outer surface of the protective outer layer is coated with an anti-oxidation coating. According to the airplane drying metal pipe, by arranging the functional inner layer, the drying efficiency and reliability are improved, honeycomb-shaped micropores (50-200 microns) of the functional inner layer and the axial water guide grooves form an adsorption-dredging closed loop, the hydroxyapatite hydrophilic coating is matched, the moisture adsorption rate is increased by 30% or above, the humidity in the pipe can be stably controlled to be 5% or below, and the drying efficiency and reliability of the airplane drying metal pipe are improved. The technical problems that an existing dry metal pipe manufacturing process is limited, and functional structures are difficult to integrate are solved.
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