Stratospheric airship with large-scale rigid-flexible integrated structure

Abstract

The invention discloses a stratospheric airship with a large-scale rigid-flexible integrated structure. The stratospheric airship comprises an outer bag body supported by a tensioning integral main keel and a plurality of sealed inner bag bodies inside the outer bag body. The tensioning integral main keel comprises a plurality of stiffening rings arranged side by side and a plurality of central core shaft trusses which are sequentially connected with the two ends of a hub shaft in the center of each stiffening ring and are through in the length direction of the stratospheric airship. When thetemperature or the illumination changes, the tensioning integral main keel is subjected to negative pressure from the outer bag body, so that the volume change of the outer bag body is small, and thestratospheric airship can still be relatively stably suspended in the stratosphere. According to the stratospheric airship, by arranging the fixed-shaped tensioning integral main keel, the appearanceof the outer bag body is limited, the volume and buoyancy stability of the outer bag body are basically guaranteed, long-term air flying can be achieved, the internal pressure control is simple, the attitude is stable, the energy consumption is low, the levitation and return flight controllability is excellent, and a foundation is laid for the industrial application of the stratospheric airship.

Description

technical field [0001] The invention relates to the technical field of aeroplanes, in particular to a stratospheric airship with a large-scale rigid-flexible structure. Background technique [0002] The stratosphere, also called the stratosphere, is the second layer of the earth's atmosphere from bottom to top, above the troposphere and below the middle layer, that is, about 10-50 kilometers above sea level, warm at the top and cold at the bottom, with an average atmospheric density of about 88.9 g / m 3 , The atmosphere in the stratosphere flows horizontally, tumbling up and down rarely occurs, and the air flow is relatively stable, so most aircraft fly in the stratosphere. [0003] The stratospheric airship is a low-dynamic aircraft that utilizes static buoyancy, combined with propulsion and integrated environmental control, flight control, energy and other sub-systems, and stays in the space near the stratosphere for a long time. It has a wide range of military and civilia...

AI Technical Summary

Problems solved by technology

[0005] Among them, the Chinese patent application "A Bionic Stratospheric Airship" (CN108706091A) and "A Coordinated Control Method for Stratospheric Airship Buoyancy and Pressure" (CN108725734A) proposed a new type of airship based on the shape principle of the mitral jellyfish Configuration and layout, the heat-regulating airbag is filled with gas-liquid reversible control working medium, the working medium is converted between liquid state and gaseous state through the thermodynamic cycle device, and the pressure and buoyancy cooperative control method is adopted to realize the Long-term control of pressure and buoyancy, but does not solve the problem of center of mass adjustment

[0006] Chinese patent "A Stratospheric Airship Containing a Hydrogen Regulating Device" (CN106394855A), through the release of hydrogen storage ballast, replenishes the loss of helium, thereby maintaining buoyancy and pressure, and combining the hydrogen-oxygen-water electrochemical reaction of the fuel cell to achieve circulation , however, there are many technical difficulties, and hydrogen is currently prohibited from being used in airships

[0007] The Chinese patent "A Airship with Ammonia Secondary Airbag and Its Buoyancy Control Method" (ZL201110012621.8) uses an ammonia auxiliary airbag ternary airbag, and realizes the control of pressure and buoyancy through the phase transition between gas and liquid. This scheme has high feasibility, but the influence of ammonia working medium on the center of buoyancy and the center of mass of the airship and its control problems have not been effectively resolved

However, the rigidity of the prestressed stiffening ring of this structure is low and the stability is very poor. Large bending force, easy to lose stability, low bearing capacity, inconvenient installation, difficult to form an overall feasible pre-tension; flexible outer capsule structure and prestressed structural system are difficult to coordinate force, the overall structural efficiency is low

[0009] The Chinese patent application "a new structure of rigid stratospheric airship" (CN108725741A) provides a rigid stratospheric airship, in which a plurality of external capsule frames composed of stiffening rings and rods are arranged outside the external capsule, and the internal capsule It is divided into capsules arranged in sequence along the axial direction of the airship to store helium, and air is stored in the capsule between the outer capsule and the inner capsule. Although the solution is called a rigid airship and can withstand negative pressure, the In essence, the scheme is still an airship concept with an overall soft structure, and only a partially enhanced structural system, that is, the entire airship structural system still needs to inflate the outer capsule with overpressure to maintain the shape and stiffness of the airship

However, the capsule body is generally non-negative pressure, which can be close to zero pressure. Part of the capsule body (spherical head or low-resistance streamline shape) cannot maintain its shape and rigidity under low pressure or zero pressure. At the same time, this invention is only for airships. The structural system does not involve the improvement of the overall characteristics of the airship

[0011] That is, the long-term survivability of stratospheric airships in the prior art has not been well resolved, and has become an obstacle to the industrial application of stratospheric airships

Images