High-strength light-weight duct and manufacturing method thereof

Abstract

The invention discloses a high-strength light-weight duct and a manufacturing method thereof. The duct comprises an alloy frame and an envelope, wherein the alloy frame comprises two rings respectively made from a thin-walled tube, and a plurality of support tubes which are used for supporting the two rings and made from thin-walled tubes; the envelope is fixed between the two rings, and uniformly covered between the two rings in the circumferential direction. On the basis of the alloy frame, the envelope for wrapping is used for further reinforcement, so that the frame structure is firmer; the envelope material is light in weight, but has sufficient strength, so can completely prevent propeller fragments from penetrate through the duct rings; and even if the envelope can not prevent the propeller fragments from penetrating through the duct rings, the throwing force is greatly reduced, thereby preventing the driver or object from injuries.

Description

technical field [0001] The invention belongs to the field of propelling propeller ducts for light aircraft, and in particular relates to a high-strength lightweight duct and a manufacturing method thereof. Background technique [0002] The main purpose of the propulsion duct (duct circle) of light aircraft (such as airship, small aircraft) and heavy aircraft (such as aircraft, rocket) is still different. The former mainly plays a protective role, and the latter mainly plays a role in improving The role of propulsion. [0003] In the prior art, the manufacturing process of light aircraft ducts (duct rings) mainly adopts two methods: ordinary metal frame type and glass fiber reinforced plastic paste molding. [0004] Ordinary metal frame type: [0005] 1) Although this production form can achieve relatively light weight by selecting materials, it can only protect people or objects from being involved by the propeller, and it will not be able to protect the objects that are s...

AI Technical Summary

Problems solved by technology

[0007] 1) Although the duct ring made of FRP paste has a good protective effect, it increases the weight of the duct ring, which violates the principle of lighter weight requirements for light aircraft, such as the weight requirements in the field of aerostats It is often calculated to the gram level, and the weight of a pair of 20-meter-class airship fiberglass duct rings can reach more than 10 kg, which greatly increases the manufacturing cost of the airship itself;

[0008] 2) Due to the cumbersome manufacturing process, once the FRP duct ring is damaged, it needs to be repaired, and the maintenance cycle is long, which often affects the flight mission;

[0009] 3) Because the quality of this process itself is already high, it is not easy to add the outer skin for decoration, and the aesthetics is poor

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