Soft stratospheric airship with multiple air chambers, high overpressure and low resistance

Abstract

The multi-air-chamber high-overpressure low-resistance soft stratospheric airship comprises a front wrapping piece, a middle wrapping piece, a rear wrapping piece and a flexible diaphragm, the front wrapping piece, the middle wrapping piece and the rear wrapping piece are sequentially connected and surround to form an airship body structure, and the connecting position between the front wrapping piece and the middle wrapping piece is connected with the flexible diaphragm. Flexible diaphragms are arranged at the connecting position between the front wrapping piece and the rear wrapping piece and the connecting position between the middle wrapping piece and the rear wrapping piece, a front rectification helium cabin is formed in the front wrapping piece through separation of the flexible diaphragms, a middle gas cabin is formed in the middle wrapping piece, a tail edge high-pressure helium cabin is formed in the rear wrapping piece, and a helium bag is arranged in the front rectification helium cabin. A helium air bag is arranged in the trailing edge high-pressure helium cabin, an air bag and electric control pressure adjusting equipment are arranged in the middle air cabin, and the electric control pressure adjusting equipment is connected with the air bag. The multi-air-chamber high-overvoltage low-resistance soft stratospheric airship has the advantages of being excellent in stability and low in release difficulty.

Description

Technical Field

[0001] The present invention relates to the technical field of aerospace vehicles, and in particular to a multi-chamber high-overpressure low-resistance soft stratospheric airship. Background Art

[0002] Currently, stratospheric aerostats mainly include superpressure balloons, semi-rigid airships and zero-pressure balloons. Among them, superpressure balloons are the only mature stratospheric aerostats and are widely used in scientific research and commerce. Semi-rigid airships are still in the experimental stage, but are expected to be put into practical use in the next 5-10 years.

[0003] A super-pressure balloon is a sealed aerostat that maintains a stable altitude by keeping its internal pressure consistently higher than the ambient pressure, avoiding the diurnal altitude fluctuations common with traditional zero-pressure balloons. It is currently the primary configuration for aerostats in the stratosphere (20-50 km).

[0004] Typical examples of stratospheric aerostats include Google Loon (a discontinued project), which has an altitude of 18-25 km and is unpowered. It achieves regional stationing by dynamically adjusting the balloon's altitude (taking advantage of wind directions at different altitudes). A typical representative of stratospheric airships is China's "Dream Yuanhao" stratospheric airship, which has a semi-rigid structure design and consists of a skeleton and airbag hybrid.

[0005] The problems existing in conventional airships are as follows: Traditional airships face three major bottlenecks in the stratosphere (20-50 km): material failure (volume expansion >50 times at ultra-low pressure), loss of control at altitude (diurnal temperature swings cause dramatic gas contraction / expansion), and excessive wind resistance (inefficient aerodynamic design). Specifically, super-pressure balloons (such as Google Loon) lack maneuverability, while semi-rigid airships (such as the Stratobus) are heavy and bulky, requiring large space and hangars for launch and transportation.

[0006] In order to solve the above problems, it is necessary to provide a multi-chamber high-superpressure low-resistance soft stratospheric airship. Summary of the Invention

[0007] The object of the present invention is to provide a multi-chamber high-overpressure low-resistance soft stratospheric airship with excellent stability and low release difficulty.

[0008] To achieve the above object, the application provides a multi-chamber high-pressure low-resistance soft stratosphere airship, which comprises a front wrapping part, an intermediate wrapping part, a rear wrapping part and flexible diaphragms. The front wrapping part, the intermediate wrapping part and the rear wrapping part are sequentially connected and surrounded to form a hull structure. The connection between the front wrapping part and the intermediate wrapping part and the connection between the intermediate wrapping part and the rear wrapping part are both provided with the flexible diaphragms. The front wrapping part is divided into a front whole-body helium cabin by the flexible diaphragm, the intermediate wrapping part is divided into an intermediate cabin, and the rear wrapping part is divided into a tail edge high-pressure helium cabin. The front whole-body helium cabin is provided with a helium airbag, the tail edge high-pressure helium cabin is provided with a helium airbag, the intermediate cabin is provided with an air conditioning mechanism, and the air conditioning mechanism comprises an air airbag and an electrically controlled pressure regulating device. The electrically controlled pressure regulating device is connected with the air airbag. When the helium airbag expands, the electrically controlled pressure regulating device deflates the air airbag to balance the expansion of the helium airbag in the hull structure. When the helium airbag shrinks, the air airbag inhales under the drive of the electrically controlled pressure regulating device to balance the shrinkage of the helium airbag in the hull structure.

[0009] Preferably, the intermediate wrapping part is provided with at least one, and all the intermediate wrapping parts are sequentially connected. The connections between all the intermediate wrapping parts are provided with the flexible diaphragms. The intermediate cabin is divided into at least one cabin unit by the flexible diaphragm.

[0010] Specifically, the number of the intermediate wrapping parts is singular. The cabin unit is provided with a helium airbag or the air conditioning mechanism. All the helium airbags and all the air conditioning mechanisms are alternately arranged along the length direction of the hull structure.

[0011] Specifically, the connections between the front wrapping part and the intermediate wrapping part, the connections between the intermediate wrapping part and the rear wrapping part, and the connections between all the intermediate wrapping parts are connected by high-strength zipper structures.

[0012] Preferably, the intermediate wrapping part is provided with three, and the three intermediate wrapping parts are sequentially connected. The connections between all the intermediate wrapping parts are provided with the flexible diaphragms. The intermediate cabin is divided into a first air load cabin, a main helium cabin and a second air load cabin which are sequentially arranged by the flexible diaphragm. The first air load cabin and the second air load cabin are each provided with a group of air conditioning mechanisms. The main helium cabin is provided with a helium airbag.

[0013] Preferably, the first air load cabin and the second air load cabin are each provided with a mounting platform. The mounting platform is provided with avionics and loads.

[0014] Preferably, the multi-chamber high-superpressure low-drag soft stratospheric airship further comprises a tail fin, and the helium airbag in the trailing edge high-pressure helium chamber is a high-pressure helium airbag, and the tail fin can be mounted on the rear package with the support of the high-pressure helium airbag.

[0015] Preferably, the multi-chamber high-superpressure low-drag soft stratospheric airship further includes a propulsion system and a support rod, and the propulsion system is installed on the hull structure through the support rod.

[0016] Preferably, the front-rectifying helium chamber is a high-pressure, low-resistance helium chamber.

[0017] Preferably, the front wrapping piece, the middle wrapping piece and the rear wrapping piece are all wrapping pieces that have been subjected to skin treatment, and their surfaces are covered with a micro-groove drag reduction film, wherein the groove depth of the micro-groove drag reduction film is ≤50 μm. The front package, middle package and rear package of the multi-chamber high-overpressure low-drag soft stratospheric airship provided by the present invention are separated into multiple independent air chambers by flexible diaphragms, and each air chamber is packaged with an air bag or a helium bag, which is equivalent to dividing the entire hull structure into multiple independent air chamber structures. In this way, each of the air chambers can be independently inflated and then connected, which is suitable for various site environments and improves convenience; the multi-chamber high-overpressure low-drag soft stratospheric airship controls the helium pressure by adjusting the pressure of the air regulating mechanism. The airship adopts a non-forming release method. All air bags or helium bags are made of ultra-high pressure materials. The required helium or air is filled before release. At this time, the airship is not formed. After reaching the target altitude, the pressure of each air chamber reaches the design value. The helium bag expands to a stable state of the hull structure due to the pressure change during the ascent. The airship stays at the target altitude and is highly stable. The internal gas pressure of a stratospheric airship will experience significant fluctuations due to the temperature difference between day and night. During the day, solar radiation heats the gas in the helium and air bags, causing the temperature to rise (for example, from -70°C to +30°C). The gas volume expands, and the hull structure formed by the front, middle and rear packages of the airship connected in sequence is designed for overpressure. The extremely high strength and extremely low ductility of the skin material work together to minimize the volume change and can be considered constant, causing the pressure inside the airship to rise sharply. When the pressure in the helium and air bags rises, the electronically controlled pressure regulating device deflates the air bags to balance the expansion of the helium bags within the hull structure. The flexible diaphragm deforms toward the air bag to provide expansion space for the helium bags, reducing the pressure in the air compartment where the helium bags reside, thereby reducing the hoop stress on the entire hull structure. This prevents internal pressure from causing hull structure rupture, increases the lifespan of the airship, and overcomes the shortcomings of traditional stratospheric airships, which suffer from poor buoyancy stability and structural strength due to the diurnal temperature difference. During nighttime temperature drops (e.g., from +30°C to -80°C), the gas in the helium and air bags contracts, causing a rapid drop in pressure. When pressure is insufficient, the air bag, driven by the electronically controlled pressure regulating device, inhales to balance the contraction of the helium bags within the hull structure. The flexible diaphragm deforms toward the helium bags to provide expansion space for the air bags, ensuring pressure balance and avoiding the collapse and deformation of traditional hull structures, which increases aerodynamic drag and may cause localized stress concentration. The present invention ensures that the overall pressure of the airship is constant by changing the volume of the helium chamber, the volume of the air bag and the volume of the air chamber without changing the amount of helium. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The diagram is a schematic diagram of the internal structure of the multi-chamber high-overpressure low-drag soft stratospheric airship of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the multi-chamber high-overpressure low-drag soft stratospheric airship of the present invention.

[0020] Figure 3 The diagram is a front view of the multi-chamber high-overpressure low-resistance soft stratospheric airship of the present invention. DETAILED DESCRIPTION

[0021] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the embodiments and the accompanying drawings.

[0022] See also Figures 1 to 3The multi-chamber high-superpressure low-drag soft stratospheric airship 100 of the present invention includes a front wrapping piece 1, an intermediate wrapping piece 2, a rear wrapping piece 3 and a flexible diaphragm 4. The front wrapping piece 1, the intermediate wrapping piece 2 and the rear wrapping piece 3 are connected and surrounded in sequence to form a hull structure 100a. The front wrapping piece 1, the intermediate wrapping piece 2 and the rear wrapping piece 3 are detachably connected. The connection between the front wrapping piece 1 and the intermediate wrapping piece 2, as well as the connection between the intermediate wrapping piece 2 and the rear wrapping piece 3 are both provided with a flexible diaphragm 4. By separating the flexible diaphragm 4, a front straightening helium cabin 5 is formed in the front wrapping piece 1, an intermediate air cabin 6 is formed in the intermediate wrapping piece 2, and a trailing edge high-pressure helium cabin 7 is formed in the rear wrapping piece 3. The front fairing helium chamber 5 has a helium airbag 8, the front wrapping piece 1 is the head of the airship, and the opening of the front wrapping piece 1 has a flexible diaphragm 4. The cavity wrapped by the front wrapping piece 1 and the flexible diaphragm 4 is used to accommodate the helium airbag 8. The number of helium airbags 8 is not limited and can be one or more. The helium airbag 8 is provided with an air pipe and a valve for inflation and deflation during assembly. The trailing edge high-pressure helium chamber 7 has a helium airbag 8. The rear wrapping piece 3 is the tail of the airship. The opening of the rear wrapping piece 3 has a flexible diaphragm 4. The cavity wrapped by the rear wrapping piece 3 and the flexible diaphragm 4 is used to accommodate the helium airbag 8. The number of helium bags 8 is not limited, and can be one or more. Helium bags 8 are equipped with air pipes (not shown) and valves (not shown) for inflation and deflation during assembly. The intermediate air chamber 6 contains an air conditioning mechanism 9. The intermediate wrapper 2 is a cylindrical structure with openings on both sides. Both openings of the intermediate wrapper 2 are equipped with flexible diaphragms 4. The cavity enclosed by the intermediate wrapper 2 and the flexible diaphragms 4 can accommodate air bags 91. The number of air bags 91 is not limited, and can be one or more. Air bags 91 are equipped with air pipes and valves for inflation and deflation. The front wrapper 1, intermediate wrapper 2, and rear wrapper 3 are separated into multiple independent air chambers by flexible diaphragms, each of which contains an air bag 91 or a helium bag 8. Conventional stratospheric airships (especially large rigid or semi-rigid airships) require extremely large hangars and landing sites for launch. The present invention is a flexible multi-chamber airship, constructed by on-site assembly of multiple air chambers, which can significantly reduce the required landing space. Each section can be inflated independently, so that they can be inflated independently and then connected, which can greatly shorten the operation time and is suitable for a variety of site environments. It can be quickly deployed within a limited weather window, improving convenience. More specifically, as follows: See also Figures 1 to 3, the air conditioning mechanism 9 comprises an air bag 91 and an electrically controlled pressure regulating device 92, the electrically controlled pressure regulating device 92 is connected with a valve structure of the air bag 91, when the helium air bag 8 expands, the electrically controlled pressure regulating device 92 deflates the air bag 91 to balance the expansion of the helium air bag 8 in the boat body structure 100a, when the helium air bag 8 shrinks, the air bag 91 inhales under the drive of the electrically controlled pressure regulating device 92 to balance the shrink of the helium air bag 8 in the boat body structure 100a. The multi-chamber high-pressure low-resistance soft stratosphere airship 100 controls the pressure of helium by adjusting the pressure of the air conditioning mechanism 9, the airship adopts a non-forming release method, all air bags 91 or helium air bags 8 are super high pressure materials, and the required helium or air is filled before release, at this time, the airship is not formed, after reaching the target height, the pressure of each air chamber reaches the design value, the helium air bag 8 expands to the stable state of the boat body structure 100a due to the change of air pressure in the rising process, and the airship stays at the target height, and the height is stable. In the day and night temperature difference change, the internal gas pressure of the stratosphere airship will experience significant fluctuations, in the daytime, the sun radiation heats the gas in the helium air bag 8 and the air bag 91, the temperature rises (such as from -70 DEG C to + 30 DEG C), the gas volume expands, the front wrapping part 1, the middle wrapping part 2 and the rear wrapping part 3 of the airship are sequentially connected to form the boat body structure 100a, which is designed as super pressure, the volume is constant, and the pressure in the boat rises sharply. When the pressure in the helium air bag 8 and the air bag 91 rises, the electrically controlled pressure regulating device 92 deflates the air bag 91 to balance the expansion of the helium air bag 8 in the boat body structure 100a, the flexible diaphragm 4 deforms to the air bag 91 to provide expansion space for the helium air bag 8, so that the pressure of the air chamber where the helium air bag 8 is located is reduced, the circumferential stress that the overall boat body structure 100a needs to bear is reduced, the rupture of the boat body structure 100a caused by internal pressure pulling is avoided, the service life of the airship is improved, and the defects of poor buoyancy stability and poor structural strength of the traditional stratosphere airship due to the day and night temperature difference change are overcome; in the night, the temperature drops sharply (such as from + 30 DEG C to - 80 DEG C), the gas in the helium air bag 8 and the air bag 91 shrinks, causing the pressure to drop rapidly. When the pressure is insufficient, the air bag 91 inhales under the drive of the electrically controlled pressure regulating device 92 to balance the shrink of the helium air bag 8 in the boat body structure 100a, the flexible diaphragm 4 deforms to the helium air bag 8 to provide expansion space for the air bag 91, so that the pressure balance is ensured, and the traditional boat body structure 100a is prevented from collapsing and deforming, the aerodynamic resistance is prevented from becoming large and local stress concentration is prevented from being caused. The present application ensures the constant overall pressure of the airship by not changing the amount of helium, but changing the volume of the helium chamber, the volume of the air bag 91 and the volume of the air chamber. Please refer to Figures 1 to 3At least one intermediate wrapping element 2 is provided, and all intermediate wrapping elements 2 are sequentially connected. Flexible diaphragms 4 are provided at the connections between all intermediate wrapping elements 2. Flexible diaphragms 4 divide the intermediate air chamber 6 into at least one air chamber unit. For example, when there is only one intermediate wrapping element 2, the front wrapping element 1 and the flexible diaphragm 4 enclose the helium bag 8, the intermediate wrapping element 2 and the flexible diaphragms 4 on both sides enclose the air bag 91, and the rear wrapping element 3 and the flexible diaphragm 4 enclose the helium bag 8. The inflation and deflation of the central air bag 91 balance the expansion and contraction of the helium bags 8 on both sides. Similarly, when there are two intermediate wrapping elements 2, both air chamber units formed by the intermediate wrapping elements 2 can accommodate the air bag 91. Preferably, the number of intermediate wrapping members 2 is odd, and a helium airbag 8 or an air conditioning mechanism 9 is provided in the air cabin unit. All the helium airbags 8 and all the air conditioning mechanisms 9 are arranged alternately along the length direction of the hull structure 100a. When the number of intermediate wrapping members 2 is odd, the front fairing helium airbag 5 is fixedly wrapped with the helium airbag 8, and the trailing edge high-pressure helium airbag 7 is fixedly wrapped with the helium airbag 8. The multiple air cabin units formed by the multiple sections of intermediate wrapping members 2 can alternately wrap the helium airbag 8 or the airbag 91. For example, when When there are five air capsule units, including the helium airbag 8 fixedly wrapped in the front fairing helium capsule 5 and the helium airbag 8 fixedly wrapped in the trailing edge high-pressure helium capsule 7, the airbags in the hull structure 100a are distributed in the order of helium airbag 8, air airbag 91, helium airbag 8, air airbag 91, helium airbag 8, air airbag 91 and helium airbag 8, thereby forming a layout in which the helium airbag 8 and the air bag 91 are alternately arranged. This makes the regulation of the air bag 91 more uniform, and the air pressure in the airship can be quickly adjusted to a stable state.

[0023] See also Figures 1 to 3 The connection between the front wrapping piece 1 and the middle wrapping piece 2, the connection between the middle wrapping piece 2 and the rear wrapping piece 3, and the connection between all the middle wrapping pieces 2 are connected by a high-strength zipper structure 10, thereby realizing a detachable connection between the front wrapping piece 1, the middle wrapping piece 2 and the rear wrapping piece 3.

[0024] See also Figures 1 to 3 In this embodiment, three intermediate wrapping members 2 are provided, and the three intermediate wrapping members 2 are connected in sequence. Flexible diaphragms 4 are provided at the connections between all the intermediate wrapping members 2. The flexible diaphragms 4 separate the intermediate air chamber 6 into a first air load chamber 61, a main helium chamber 62, and a second air load chamber 63, which are arranged in sequence. The first air load chamber 61 and the second air load chamber 63 are each provided with an air conditioning mechanism 9. The main helium chamber 62 has a helium bag 8, which provides the main buoyancy of the airship.

[0025] See also Figures 1 to 3The first air load compartment 61 and the second air load compartment 63 are each provided with an installation platform 64, on which avionics equipment and payloads are installed. Installing payloads within the aircraft's fairing structure can significantly improve the aircraft's space utilization, aerodynamic performance, structural efficiency, and mission flexibility. The present invention includes an equipment installation platform 64, and all avionics equipment and payloads can be installed inside the airship after external debugging is completed before launch. The payloads and avionics equipment of traditional stratospheric airships are installed on a truss below the superpressure balloon. The truss and superpressure balloon are connected by ropes, so when the truss provides power, the superpressure balloon will be pulled and moved by the truss. At this time, the truss, payload, and avionics equipment will increase aerodynamic drag. The present invention installs all avionics equipment, payloads, etc. within the fairing structure, thereby reducing overall aerodynamic drag.

[0026] See also Figures 1 to 3 The multi-chamber high-superpressure low-drag soft stratospheric airship 100 of the present invention also includes a tail 11. The helium airbag 8 in the trailing edge high-pressure helium chamber 7 is a high-pressure helium airbag 8. With the support of the high-pressure helium airbag 8, the tail 11 can be installed on the rear package 3. The rear package 3 provides a stable and reliable installation surface for the installation of the tail 11.

[0027] See also Figures 1 to 3 The multi-chamber high-superpressure, low-drag soft stratospheric airship 100 of the present invention further includes a propulsion system 12 and a support rod 13. The propulsion system 12 is mounted on the hull structure 100a via the support rod 13. The support rod 13 extends from the interior of the airship to connect the propulsion system 12. The propulsion system 12 may be composed of components such as an engine, a speed reducer, and a propeller. Since this is not the focus of the present invention, it will not be described here.

[0028] See also Figures 1 to 3 The multi-chamber high-superpressure low-drag soft stratospheric airship 100 of the present invention further includes an energy system 14, which includes a plurality of solar panels 141. The solar panels 141 are attached to the outer surface of the hull structure 100a to effectively reduce aerodynamic resistance.

[0029] See also Figures 1 to 3 The front wrapper 1, middle wrapper 2, and rear wrapper 3 are all skinned, their surfaces covered with a microgrooved drag-reducing film with a groove depth of ≤50μm. The skin material's extremely high strength and low ductility combine to minimize volume change, making it considered constant. Preferably, the front fairing helium capsule 5 is a high-pressure, low-drag helium capsule, but this is not limited to this. High pressure provides support, meeting the requirements of the exterior design. Its primary purpose is to reduce the aerodynamic drag of the incoming flow, and combined with the special skin treatment, this achieves even better results.

[0030] See also Figures 1 to 3The multi-chamber, high-overpressure, low-drag, flexible stratospheric airship 100 of the present invention features a pressure gradient design: the outer chamber has a high overpressure value (200-300 Pa) and is made of UHMWPE (thickness ≤ 150 μm); the inner chamber has a low overpressure value (50-100 Pa) and is made of thin film material. The chambers are interconnected, and an intelligent valve group dynamically adjusts the pressure balance of each chamber. The multi-chamber, high-overpressure, low-drag, flexible stratospheric airship 100 of the present invention forms a low-drag aerodynamic shape through the arrangement of various chambers. The airship has an aspect ratio of 8:1, a streamlined pointed arch nose (curvature radius R = 0.25L), and an integrated X-shaped tail fin 11 at the rear. The airship's power unit is directly and rigidly connected to the hull to achieve maximum maneuverability.

[0031] Please refer to Figures 1 to 3 The working process of the multi-chamber high-overpressure low-resistance soft stratospheric airship 100 of the present invention is as follows: Each chamber contains an air bag 91 or helium bag 8, each independently inflated and then connected via a high-strength zipper structure 10. Prior to launch, the required helium or air is filled. At this point, the airship is not yet formed. Upon reaching the target altitude, the pressure in each chamber reaches the designed value. The helium bag 8 expands to a stable state within the hull structure 100a due to pressure changes during ascent, allowing the airship to remain at the target altitude and maintain a stable altitude. When the flight environment changes, the internal gas pressure of the stratospheric airship experiences significant fluctuations due to the diurnal temperature difference. During the day, solar radiation heats the gas within the helium bag 8 and air bag 91, raising its temperature (e.g., from -70°C to +30°C). This causes the gas to expand in volume, and the hull structure 100a, formed by the front, middle, and rear wrapping elements 1, 2, and 3, is enclosed and surrounded by the airship. This is an overpressure design, maintaining a constant volume, and the internal pressure rises dramatically. When the pressure inside the helium bag 8 and the air bag 91 rises, the electronically controlled pressure regulating device 92 deflates the air bag 91 to balance the expansion of the helium bag 8 inside the hull structure 100a. The flexible diaphragm 4 deforms toward the air bag 91 to provide expansion space for the helium bag 8, reducing the pressure in the air chamber where the helium bag 8 resides, thereby reducing the hoop stress on the entire hull structure 100a and preventing rupture of the hull structure 100a due to internal pressure. During nighttime temperature drops (e.g., from +30°C to -80°C), the gas inside the helium bag 8 and the air bag 91 contracts, causing a rapid drop in pressure. When pressure is insufficient, the air bag 91, driven by the electronically controlled pressure regulating device 92, inhales to balance the contraction of the helium bag 8 inside the hull structure 100a. The flexible diaphragm 4 deforms toward the helium bag 8 to provide expansion space for the air bag 91, ensuring pressure balance.

[0032] The front package 1, the middle package 2 and the rear package 3 of the multi-chamber high-overpressure, low-drag soft stratospheric airship 100 provided by the present invention are separated into multiple independent air chambers by flexible diaphragms, and each air chamber is wrapped with an air bag 91 or a helium bag 8, which is equivalent to dividing the entire hull structure 100a into multiple independent air chamber structures, so that each can be independently inflated and then connected, which is suitable for a variety of site environments and improves convenience; the multi-chamber high-overpressure, low-drag soft stratospheric airship 100 controls the helium pressure by adjusting the pressure of the air conditioning mechanism 9. This airship adopts a non-forming release method. All air bags 91 or helium bags 8 are made of ultra-high pressure materials and are filled with the required helium or air before release. At this time, the airship is not formed. After reaching the target altitude, the pressure of each air chamber reaches the design value. The helium bag 8 expands to a stable state of the hull structure 100a due to the air pressure change during the ascent. The airship stays at the target altitude and is highly stable. As the temperature of a stratospheric airship varies between day and night, its internal gas pressure will experience significant fluctuations. During the day, solar radiation heats the gas in the helium bag 8 and the air bag 91, causing the temperature to rise (e.g., from -70°C to +30°C), and the gas volume to expand. The front package 1, the middle package 2, and the rear package 3 of the airship are connected in sequence to form the hull structure 100a, which is an overpressure design with a constant volume, and the pressure inside the airship rises sharply. When the pressure in the helium bag 8 and the air bag 91 rises, the electronically controlled pressure regulating device 92 deflates the air bag 91 to balance the expansion of the helium bag 8 in the hull structure 100a. The flexible diaphragm 4 deforms toward the air bag 91 to provide expansion space for the helium bag 8, reducing the pressure in the air chamber where the helium bag 8 is located, thereby reducing the hoop stress on the entire hull structure 100a. This prevents rupture of the hull structure 100a due to internal pressure, thereby extending the life of the airship and overcoming the shortcomings of traditional stratospheric airships, such as poor buoyancy stability and structural strength due to the diurnal temperature difference. When the temperature drops sharply at night (for example, from +30°C to -80°C), the gas in the helium bag 8 and the air bag 91 contracts, causing a rapid drop in pressure. When pressure is insufficient, the airbag 91, driven by the electrically controlled pressure regulating device 92, draws air to balance the contraction of the helium bag 8 within the hull structure 100a. The flexible diaphragm 4 deforms toward the helium bag 8, providing expansion space for the airbag 91, ensuring pressure balance. This prevents the collapse and deformation of the conventional hull structure 100a, which increases aerodynamic drag and potentially causes localized stress concentration. The present invention maintains a constant overall pressure in the airship by maintaining the amount of helium, but by varying the volume of the helium chamber, the airbag 91, and the air chamber.

[0033] The above disclosure is merely a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A multi-chamber high-overpressure low-resistance soft stratospheric airship, characterized in that: The hull structure comprises a front wrapping piece, a middle wrapping piece, a rear wrapping piece and a flexible diaphragm. The front wrapping piece, the middle wrapping piece and the rear wrapping piece are sequentially connected and surrounded to form a hull structure. The flexible diaphragm is provided at the connection between the front wrapping piece and the middle wrapping piece, and at the connection between the middle wrapping piece and the rear wrapping piece. The flexible diaphragm is used to separate the front wrapping piece so that a front fairing helium chamber is formed in the front wrapping piece, an intermediate air chamber is formed in the middle wrapping piece, and a trailing edge high-pressure helium chamber is formed in the rear wrapping piece. The front fairing helium chamber has A helium airbag, wherein the trailing edge high-pressure helium chamber contains a helium airbag, and the intermediate air chamber contains an air conditioning mechanism, wherein the air conditioning mechanism includes an airbag and an electrically controlled pressure regulating device, wherein the electrically controlled pressure regulating device is connected to the airbag. When the helium airbag expands, the electrically controlled pressure regulating device deflates the airbag to balance the expansion of the helium airbag in the hull structure. When the helium airbag contracts, the airbag, driven by the electrically controlled pressure regulating device, inhales air to balance the contraction of the helium airbag in the hull structure.

2. The multi-chamber high-overpressure low-drag soft stratospheric airship according to claim 1, characterized in that: There is at least one intermediate wrapping piece, all of which are connected in sequence, and the flexible diaphragm is provided at the connection between all of the intermediate wrapping pieces. The intermediate air cabin is separated into at least one air cabin unit by the separation of the flexible diaphragm.

3. The multi-chamber high-overpressure low-resistance soft stratospheric airship according to claim 2, characterized in that: The number of the intermediate wrapping members is odd, and the air cabin unit is provided with a helium airbag or the air conditioning mechanism, and all the helium airbags and all the air conditioning mechanisms are alternately arranged along the length direction of the hull structure.

4. The multi-chamber high-overpressure low-resistance soft stratospheric airship according to claim 2, characterized in that: The connection between the front wrapping piece and the middle wrapping piece, the connection between the middle wrapping piece and the rear wrapping piece, and the connections between all the middle wrapping pieces are connected by a high-strength zipper structure.

5. The multi-chamber high-overpressure low-drag soft stratospheric airship according to claim 1, characterized in that: There are three intermediate wrapping members, which are connected in sequence. The flexible diaphragm is provided at the connection between all the intermediate wrapping members. The intermediate air cabin is separated by the flexible diaphragm into a first air load cabin, a main helium cabin, and a second air load cabin, which are arranged in sequence. The first air load cabin and the second air load cabin are each provided with a set of the air conditioning mechanism, and the main helium cabin has a helium airbag.

6. The multi-chamber high-overpressure low-resistance soft stratospheric airship according to claim 5, characterized in that: The first air load compartment and the second air load compartment are each provided with a mounting platform, and avionics equipment and payloads are provided on the mounting platform.

7. The multi-chamber high-overpressure low-drag soft stratospheric airship according to claim 1, characterized in that: It also includes a tail wing, and the helium airbag in the trailing edge high-pressure helium chamber is a high-pressure helium airbag. With the support of the high-pressure helium airbag, the tail wing can be installed on the rear package.

8. The multi-chamber high-overpressure low-drag soft stratospheric airship according to claim 1, characterized in that: It also includes a propulsion system and a support rod, and the propulsion system is installed on the hull structure through the support rod.

9. The multi-chamber high-overpressure low-drag soft stratospheric airship according to claim 1, characterized in that: The front-rectifying helium gas cabin is a high-pressure, low-resistance helium gas cabin.

10. The multi-chamber high-overpressure low-drag soft stratospheric airship according to claim 1, characterized in that: The front wrapping piece, the middle wrapping piece and the rear wrapping piece are all wrapping pieces that have been skinned, and their surfaces are covered with a micro-groove drag reduction film, and the groove depth of the micro-groove drag reduction film is ≤50μm.

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