Airship airbag with shape-control frames

Abstract

The invention relates to an airship airbag with shape-control frames. The airship airbag with the shape-control frames comprises an airbag casing (1) and the shape-control frames; the airtight flexible airbag casing (1) is arranged on the outer layer of the air bag, is of a laminated structure on the whole and consists of a plurality of layered structures; the inside of every layered structure is fixedly connected with the shape-control frames which comprises a plurality of pairs of vertically-arranged folding frames (2) and two pairs of shaping frames (3) respectively hinged to two ends of the folding frames (2); the airbag casing (1) of every layered structure (4) is formed by splicing the airtight film covering pieces (91) of a plurality of convex curved surface unit (9), and every convex curved surface unit (9) not only comprises one elongated airtight film covering piece (91) but also comprises a pair of end-edge fixing parts (92) on the shaping frames (3) and a pair of pulling-resistant straps (93). The airship airbag with the shape-control frames can make full use of the space inside an airship, is good in regularity of expansion and shrinkage deformation and good in repeatability and stability, and can bear relative large overpressure when being inflated and expanded fully.

Description

technical field [0001] The invention belongs to the technical field of airships, and in particular relates to an airbag with a shape control skeleton for an airship. Background technique [0002] An airship is a lighter-than-air aircraft. Its basic working principle is to rely on filling its own huge buoyant body (usually the hull) with light buoyant gases such as hydrogen and helium, so that the overall average density of the airship is equal to that of the airship it displaces. The surrounding air density is quite equal, so as to achieve the balance of buoyancy and realize hovering in the air. According to the above principles, in order to make the airship have height adjustment capability, it is necessary to adjust the net buoyancy of the airship, that is, the difference between the total buoyancy and its own weight. There are two basic ways to accomplish this goal: one is to change the shape of the airship and control the displacement of the buoyancy body to adjust the ...

AI Technical Summary

Problems solved by technology

This means that most of the time, the airbags in the airship are not fully filled. When the attitude of the airship is tilted or rotated, the inner airbags will shake and twist obviously, causing the center of gravity of the airship to shift, affecting the stability of the attitude, and even making the Airship in danger of capsizing

[0005] In order to enhance the shape certainty of the airbag in the airship, the United States has disclosed a wrinkle-resistant airbag. The principle is that the film used has a large shrinkage, which can keep the airbag body tense when it is not fully inflated. The disadvantage is that special membrane materials and complex processes are required, and the airbag is still a flexible body structure with limited shape stability

The existing technology provides some solutions for high-pressure airbags, such as: a multi-stage high-pressure airbag solution, that is, a "bag-in-bag" solution, which is used for pressurized storage of helium. Larger, poor heat dissipation of the inner airbag, etc.

A stratospheric pressure-resistant balloon scheme, the capsule of which is pumpkin-shaped, composed of multiple high-strength load-bearing belts and canopy webs protruding between the bearing belts. The protrusions of the canopy webs reduce the circumferential curvature of the membrane wall Because the tension inside the membrane is approximately equal to the product of the radius of curvature and the pressure difference between the inner wall and the outer wall of the membrane, the tension on the membrane wall is significantly reduced, so that a lightweight membrane material with relatively low strength can be selected to reduce the weight of the balloon; The disadvantage is that the capsule is essentially an air-supported cable-membrane structure. On the one hand, the structure is still a flexible body with limited stability. Practical experience has shown that it is prone to "S-shaped distortion" phenomenon; On the other hand, the bladder formed by this structure can only be in a circumferentially symmetrical shape. If it is used as an internal airbag, it is generally difficult to find a layout that can make full use of the allocated space in the boat, resulting in a large waste of space

The U.S. Aeros Corporation has carried out a low-altitude airship static weight control system test based on helium compression storage. The high-pressure air bag used is tire-shaped. The average quality of the gas loaded per unit mass of the bladder is low. In order to increase the amount of gas contained, a larger air pressure can only be adopted. For example, the pressure of compressed helium in the tire-shaped airbag in the above case is as high as several atmospheres. On the one hand, The structural safety of the capsule poses a great challenge. On the other hand, for high-altitude airships operating in a thin atmosphere environment, the boost ratio is too high, and it is very difficult to realize the compressed air equipment engineering.

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