Long endurance high altitude aerostat envelope support structure

Abstract

The utility model relates to a kind of long-haul high-altitude aerostat capsule support structure, including aerostat capsule, the outside and inside of the aerostat capsule are equipped with outer support structure and inner support structure respectively;The outer support structure includes several outer support rods that adhere to the surface of aerostat capsule and outer connector for the connection between outer support rod, several outer support rod connection composition is the closed frame around aerostat capsule one week;The inner support structure includes inner connector fixedly connected with outer connector, the outer connector and inner connector tighten aerostat capsule, the surface of the inner connector and aerostat capsule contact is wide surface, the inner side of the inner connector is connected center rope binding device by tensioning rope.The utility model can solve the problem that traditional capsule cannot maintain aerodynamic shape stably due to large deformation caused by self-weight, and the problem that traditional capsule has weak wind load capacity and is easy to wrinkle or tear locally by composite support structure and innovative connection mode.

Description

Technical Field

[0001] This utility model relates to the field of airship structure design technology, specifically to a support structure for the body of a long-endurance high-altitude airship. Background Technology

[0002] As crucial aerial observation and communication relay equipment, high-altitude aerostats require their capsule structures to maintain stable shapes over long periods in the complex high-altitude environment. Currently, the mainstream capsule structures in the industry suffer from the following key technical challenges:

[0003] 1. Insufficient resistance to deformation: When the internal air pressure of the traditional capsule is insufficient and there is no rigid support structure, it cannot stably maintain the aerodynamic shape, which affects the normal operation of the equipment.

[0004] 2. Weak wind load resistance: Under crosswind loads of 15-25 m / s, traditional capsules are prone to local wrinkling or significant dents, and in extreme cases, the capsules may tear, threatening the safety of buoyancy.

[0005] 3. Design defects of the support structure: Existing rigid supports mostly adopt a single metal ring structure, which is heavy (more than 60% heavier than this utility model under the same strength), resulting in loss of lift of the airship.

[0006] 4. Low connection reliability: Traditional capsules and support structures are mostly fixed by adhesive bonding. Under high-altitude and high-low temperature cycles (-50℃ to 60℃), the adhesive layer is prone to aging and falling off, with an average service life of only 6 months. Frequent maintenance and replacement are required, increasing operation and maintenance costs. Utility Model Content

[0007] This utility model relates to a support structure for a long-endurance high-altitude airship capsule, which is suitable for long-endurance airships such as high-altitude airships and tethered balloons at altitudes of 5,000-20,000 meters. It is especially suitable for airship equipment that needs to stay in the air for a long time (≥1 year), withstand complex airflow loads (15-25 m / s crosswinds) and high and low temperature cycles (-50℃ to 60℃). It can solve the problems of large capsule deformation, weak wind resistance and heavy support structure in traditional systems, and improve the operational stability and safety of high-altitude airships.

[0008] To achieve the above objectives, the utility model provides the following technical solution:

[0009] A support structure for a long-endurance high-altitude airship includes an airship body. An outer support structure and an inner support structure are respectively provided on the outer and inner sides of the airship body. The outer support structure includes several outer support rods that conform to the surface of the airship body and an outer connecting body for connecting the outer support rods. The several outer support rods are connected to form a closed frame surrounding the airship body. The inner support structure includes an inner connecting body fixedly connected to the outer connecting body. The outer connecting body and the inner connecting body tighten the airship body. The surface of the inner connecting body that contacts the airship body is a wide surface. The inner side of the inner connecting body is connected to a central rope bundle device via a tension rope.

[0010] Furthermore, several beams perpendicular to the outer support rods are provided between adjacent closed frames, and both ends of the beams are fixedly connected to the outer connecting bodies.

[0011] Furthermore, the external connector is a T-shaped structure, and each of the three connecting ends of the T-shaped structure is provided with a rod-shaped connecting port for inserting an external connecting rod or beam rod.

[0012] Furthermore, a flexible gasket is provided between the inner connector and the outer connector.

[0013] Furthermore, the inflection points of the outer edges of the inner connector are all arc-shaped.

[0014] Furthermore, the inner connecting body is provided with a shaft seat, the shaft seat contains a shaft, and the connecting end of the tension rope is provided with a pull ring that is rotatably connected to the shaft.

[0015] Furthermore, the external support rod is a carbon fiber rod.

[0016] Furthermore, the inner support body is an aluminum alloy structure.

[0017] The utility model has the following advantages:

[0018] The utility model addresses the industry pain point that traditional bladders, without rigid support, deform greatly under their own weight when subjected to internal pressure of 500Pa or when the internal pressure drops to a very low level, thus failing to maintain a stable aerodynamic shape. It also solves the industry pain point that traditional bladders have weak wind load resistance, are prone to local wrinkles or tears, and have low safety.

[0019] The overall weight of the utility model composite support structure is 200-250 kg (depending on the capsule specifications), which is 60%-77% lighter than a stainless steel support structure of equivalent strength (700-1100 kg), significantly reducing lift loss of the airship. The carbon fiber composite material withstands high-altitude ultraviolet radiation (cumulative radiation 1000 kWh / m²). 2 After that, the strength retention rate is ≥90%, which is suitable for long-term airborne operation.

[0020] This utility model improves connection reliability and environmental resistance. Through a clamping structure of "upper and lower flanges + rubber gaskets," the connection points remain stable and do not detach after 1000 cycles of high and low temperatures from -50℃ to 60℃, with a service life of ≥5 years, which is 12 times longer than traditional adhesive methods (≤6 months). Titanium alloy bolts and aluminum alloy joints show no corrosion in high humidity (≤10% RH) and ozone environments, while traditional carbon steel bolts show rust after 6 months. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that the utility model can produce, should still fall within the scope of the technical content disclosed in the utility model.

[0023] Figure 1 This is a product structure diagram of a long-endurance high-altitude airship shell support structure according to an embodiment of the utility model;

[0024] Figure 2 for Figure 1 A magnified view of a section in the center (A direction), which hides the airship capsule.

[0025] Figure 3 This is a structural diagram of the inner support structure in the support structure of a long-endurance high-altitude airship.

[0026] In the picture:

[0027] 1. Aircraft capsule;

[0028] 2. External support structure; 3. External support rod; 4. External connector; 5. Beam;

[0029] 6. Internal support structure; 7. Internal connector; 8. Outer edge inflection point of the internal connector; 9. Tension rope; 10. Shaft seat; 11. Pull ring. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of the utility model. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0031] like Figure 1 As shown, a support structure for a long-endurance high-altitude airship capsule 1 includes an airship capsule 1. An outer support structure 2 and an inner support structure 6 are respectively provided on the outer and inner sides of the airship capsule 1. The outer support structure 2, the inner support structure 6 and the capsule together constitute the core load-bearing structure of the high-altitude airship. The components are evenly distributed along the circumference and axis of the capsule to ensure the balance of the support force.

[0032] Among them, such as Figure 2 As shown, the external support structure 2 includes several external support rods 3 that fit the surface of the airship capsule 1 and external connecting bodies 4 for connecting the external support rods 3. The several external support rods 3 are connected to form a closed frame around the airship capsule 1. Since the airship capsule 1 is mostly elliptical or jujube-shaped, the external support structure 2 in this embodiment is taken as an annular shape. The external support rods 3 need to fit the airship capsule 1 after it is deployed. Therefore, the external support rods 3 are arc-shaped rods. The material of the arc-shaped rods is carbon fiber reinforced epoxy resin matrix composite material (carbon fiber volume fraction 60%), which is prepared by winding molding process. It takes into account both lightweight and high strength. The length of a single section is 1000-1500mm (adapted to different capsule diameters), the outer diameter is 60-80mm, and the wall thickness is 2-3mm.

[0033] Adjacent outer support rods 3 are connected by outer connectors 4. After several outer support rods 3 are connected, they are evenly distributed along the circumference of the airship capsule 1 to form a ring structure that fits on the outside of the airship capsule 1. The inner diameter of the ring structure after splicing is customized according to the capsule specifications. The outer diameter is at least twice the outer diameter of the arc rod. The splicing is reinforced with high-strength bolts such as titanium alloy. Two bolts are set at each connection point to ensure that there is no loosening. A 3mm thick silicone rubber buffer pad is set between the inner side of the ring structure and the capsule to avoid membrane damage caused by direct friction between the support structure and the capsule.

[0034] To ensure the stability of the external support structure 2 and to distribute the pressure between the external support structure 2 and the bladder body, this embodiment sets at least two parallel annular structures to form a "double-ring or multi-ring" support. At least two annular structures are located at the axial center of the bladder body, effectively preventing the bladder body from sagging in the middle. Several beams 5 perpendicular to the external support rods 3 are provided between adjacent closed frames; that is, several beams 5 are set between adjacent annular structures. The two ends of the beams 5 are respectively connected to the annular structures on both sides. The beams 5 are preferably perpendicular to the annular structures to provide the most stable connection support. The material of the beams 5 is the same as that of the external support rods 3, namely carbon fiber reinforced epoxy resin.

[0035] To simplify the structure, both ends of the beam 5 are connected to external connecting bodies 4. The external connecting bodies 4 have holes for inserting the beam 5. The external connecting bodies 4 are T-shaped structures, and each of the three connecting ends of the T-shaped structure has a rod-shaped connecting port for inserting an external connecting rod or beam 5. The beam 5 and the external connecting bodies 4 are connected by titanium alloy bolts, with two bolts at each connection point and a torque controlled between 45-55 N·m. This allows for the fixed connection between two external connecting rods and one beam 5 using only one external connecting body 4, forming a hollow mesh structure for the outer support structure 2 of the airship hull 1, maximizing the technical characteristics of minimal weight and maximum support effect.

[0036] like Figure 3 As shown, the inner support structure 6 includes an inner connector 7 fixedly connected to the outer connector 4. The inner connector 7 is made of aluminum alloy 7075-T6 (lightweight and corrosion-resistant), achieving a lightweight design for the inner support structure 6. The outer connector 4 and the inner connector 7 tighten the airship capsule 1. The surface of the inner connector 7 in contact with the airship capsule 1 is a wide surface. Since the airship capsule 1 is mostly in an uninflated state, the inner support is mostly in a state of being compressed by the capsule. Changing the point connection and line connection between the inner support and the capsule to a surface connection can disperse the pressure between the inner connector 7 and the airship capsule 1, preventing pressure concentration from causing capsule rupture. Furthermore, a flexible gasket is provided between the inner connector 7 and the outer connector 4, with a 3mm thick fluororubber gasket (temperature resistant from -60℃ to 80℃) pasted on the inner side to avoid damage to the capsule during clamping. The outer edge inflection points 8 of the inner connector are all arc-shaped to prevent sharp edges from scratching the capsule.

[0037] The inner side of the inner connecting body 7 is connected to the central rope bundle device via a tension rope 9. Specifically, the tension rope 9 is symmetrically arranged along the axial direction of the airship body 1. One end of the tension rope 9 is connected to the inner connecting body 7, and the other end is connected to the central rope bundle device. The preload is set by adjusting the flange bolts, ensuring that the tension rope 9 is always under tension, assisting in bearing the radial pressure of the body and reducing deformation of the annular structure. The tension rope 9 is made of ultra-high molecular weight polyethylene fiber (breaking strength ≥30cN / dtex, elongation at break ≤3%), with a diameter of 10-12mm and a 0.5mm thick polytetrafluoroethylene coating to enhance aging resistance and wear resistance. Furthermore, the inner connecting body 7 is provided with a shaft seat 10, and a shaft is provided inside the shaft seat 10. The connecting end of the tension rope 9 is provided with a pull ring 11 that is rotatably connected to the shaft, making the connection between the tension rope 9 and the inner connecting body 7 more flexible, eliminating unnecessary stress, and increasing the stability of the connection.

[0038] The assembly process in this embodiment is as follows:

[0039] S1. Pretreatment of the capsule: Aramid reinforcement layer is pasted at the position of the pre-set external support structure 2 on the outer surface of the airship capsule 1, and silicone rubber sealant is applied.

[0040] S2. Assembly of the support frame: All the external support rods 3 are spliced ​​into a ring structure through the external connectors, and then the beam rods 5 are fixed to the external connectors to form a complete external support structure 2.

[0041] S3. Frame and capsule connection: The outer support structure 2 is fitted onto the outer surface of the airship capsule 1, and the outer connector 4 is aligned with the position of the inner connector 7; the inner connector 7 and the flexible gasket are placed inside the airship capsule 1 and fixed by bolt clamping, with the torque controlled at 50-60 N·m.

[0042] S4. Installation of tension ropes 9: Pass any two opposite tension ropes 9 through the central through hole of the adapter joint, and fix both ends to the anchors on the end cap of the airship body 1. Adjust the preload to 5-8kN using turnbuckles, and so on, until all tension ropes 9 are installed and fixed.

[0043] S5. Sealing and Inspection: Fill the joint gap of the inner connector 7 with sealant. After completion, conduct an airtightness test (pressure drop ≤5% in 24 hours under internal pressure of 500Pa) and a deformation test to ensure that it meets the design requirements.

[0044] Although the utility model has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A long endurance high altitude aerostat envelope support structure comprising an aerostat envelope, characterised in that: The outer and inner sides of the airship capsule are respectively provided with an outer support structure and an inner support structure; The external support structure includes several external support rods that fit against the surface of the airship capsule and external connecting bodies for connecting the external support rods. The several external support rods are connected to form a closed frame around the airship capsule. The inner support structure includes an inner connecting body that is fixedly connected to the outer connecting body. The outer connecting body and the inner connecting body tighten the airship capsule. The surface of the inner connecting body that contacts the airship capsule is a wide surface. The inner side of the inner connecting body is connected to the central rope bundle device through a tension rope.

2. The long endurance, high altitude floatation platform balloon envelope support structure of claim 1 wherein: Several beams perpendicular to the outer support rods are provided between adjacent closed frames, and both ends of the beams are fixedly connected to the outer connecting body.

3. The long endurance, high altitude floatation platform balloon envelope support structure of claim 2 wherein: The external connector is a T-shaped structure, and each of the three connecting ends of the T-shaped structure is provided with a rod-shaped connecting port for inserting an external connecting rod or beam rod.

4. The long endurance, high altitude floatation platform balloon envelope support structure of claim 1 wherein: A flexible gasket is provided between the inner connector and the outer connector.

5. The long endurance, high altitude floatation platform balloon envelope support structure of claim 1 wherein: The inflection points of the outer edges of the inner connectors are all arc-shaped.

6. The long endurance, high altitude floatation platform balloon envelope support structure of claim 1 wherein: The inner connecting body is provided with a shaft seat, and the shaft seat contains a shaft. The connecting end of the tension rope is provided with a pull ring that is rotatably connected to the shaft.

7. The long endurance, high altitude floatation platform balloon envelope support structure of claim 1 wherein: The external support rod is a carbon fiber rod.

8. The long endurance, high altitude floatation platform balloon envelope support structure of claim 1 wherein: The internal support structure is an aluminum alloy structure.

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