Airship thruster bracket and semi-rigid airship

Abstract

The invention discloses an airship thrust bracket and a semi-rigid airship. The airship thrust bracket is a truss structure, comprising: a plurality of main beams (1), a plurality of groups of cross-section webs (2), a plurality of groups of diagonal webs (3), a plurality of base structural rods (4), a plurality of groups of support rods (5) and a plurality of connecting pieces. The base structural rods and the support rods are used to double-connect the hull frame, thereby improving the stability of the flight control of the semi-rigid airship.

Description

Technical Field

[0001] The invention relates to an airship side thrust bracket structure, in particular to a semi-rigid stratospheric airship side thrust bracket and a semi-rigid stratospheric airship. Background Art

[0002] Stratospheric airships have a wide range of military and civilian value, for example, they have great application value in missile defense, anti-terrorism, communications, remote sensing, space observation and atmospheric measurement. However, the flight altitude of stratospheric airships is generally around 20km above sea level, and the surrounding atmosphere is very thin, with a density of about 1 / 14 of the air density at the bottom. Therefore, in order to meet the load requirements of stratospheric airships, the volume of stratospheric airships is generally very large. At the same time, due to the influence of solar radiation, stratospheric airships have the phenomenon of over-temperature and over-pressure, which can easily lead to the destruction of the airship structure. The average wind speed in the stratosphere is 10m / s, and the maximum wind speed can reach 40m / s, which is a great test for the structural stability and flight control stability of the airship.

[0003] Generally, the pods of medium and low altitude airships are placed at the bottom, and the power system brackets are installed on the pods. This method places the engine brackets at a position too far downward from the center of buoyancy of the airship. Due to the unreasonable layout, the efficiency of the airship propulsion system is seriously affected. At the same time, the influence of torque makes it easy for the airship to have an ups and downs wave-like flight state when flying horizontally. This wave-like flight state requires more energy than the horizontally flying stratospheric airship. And because the bottom pod protrudes, the drag coefficient of the airship is increased, which further requires the airship to pay more energy.

[0004] At present, most airships adopt tail-thrust structure design. The Chinese patent application with publication number CN105644762A provides a propulsion support structure, the lower rigid structure adopts a lightweight composite material truss structure, and non-vector propulsion propellers are installed on the left and right sides of the structure. Such a structure makes the airship prone to ups and downs and wave-like flight turbulence during flight, poor flight stability, and affects the effect of ground observation.

[0005] Therefore, it is urgent to invent an airship side thrust bracket that can reduce the ups and downs of the airship during flight and improve the stability of the flight control.

[0006] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0007] The present invention provides an airship side thrust bracket and a semi-rigid airship, thereby overcoming one or more problems caused by limitations and defects of the prior art at least to a certain extent.

[0008] Other features and advantages of the present invention will become apparent from the following detailed description, or may be learned in part by practice of the present invention.

[0009] According to a first aspect of the present invention, the present invention discloses an airship thrust support, comprising: a main beam, a cross-section web, an oblique web, a base structural rod, a bracing rod and a plurality of connecting members; wherein:

[0010] There are multiple main beams, each of which includes a root and a tip. The main beams are arranged transversely and arranged in a structure of more than two layers. The main beams of each layer are shorter than the main beams of the next layer. The tips of each main beam are aligned, and the distance between the tips of two main beams is smaller than the distance between the roots.

[0011] There are multiple groups of cross-section web members, and the number of cross-section web members in each group is the same as the number of main beams. The cross-section web members in each group connect the main beams in pairs through connectors, wherein the cross-section web members in the first group connect the roots of the main beams to form an oblique cross-section, and the cross-section web members in the remaining groups are perpendicular to the main beams to form a vertical cross-section;

[0012] There are multiple groups of diagonal web members, and the number of diagonal web members is one group less than the number of cross-section web members. The number of each group of diagonal web members is the same as the number of main beams. Each group of diagonal web members is arranged between two groups of cross-section web members, and each diagonal web member is connected to two main beams and two cross-section web members through a connecting piece.

[0013] The number of the base structural rods is the same as that of the main beam rods, the middle of each base structural rod is respectively connected to each main beam rod through a connecting piece, and the two ends of the multiple base structural rods are connected in pairs through connecting pieces to form a polygonal base;

[0014] There are multiple groups of support rods, each group has two support rods, one end of the two support rods in each group is connected to each other through a connecting piece, and the other end is respectively connected to the two ends of the cross-section web of the second group.

[0015] According to an exemplary embodiment of the present invention, the airship side thrust support of the present invention further comprises a plurality of additional support rods, which are arranged between two support rods connected to the lowest main beam or between the support rods connected to the lowest main beam and the lowest main beam.

[0016] According to an exemplary embodiment of the present invention, there are four main beams, which are arranged in two layers, with two main beams in each layer, and the polygonal base formed by the base structural rods is a diamond base.

[0017] According to an exemplary embodiment of the present invention, the cross-sectional web members are provided in 6 groups, and the diagonal web members are provided in 5 groups.

[0018] According to an exemplary embodiment of the present invention, the connecting member between the two bracing rods at the highest point and the lowest point is a circumferential connecting member.

[0019] According to an exemplary embodiment of the present invention, the connecting member between two bracing rods at an intermediate height is a longitudinal connecting member.

[0020] According to an exemplary embodiment of the present invention, the main beam, cross-section web, diagonal web, base structural rod and brace rod are all carbon fiber composite hollow tubes, and the connecting piece is made of aluminum alloy, preferably aviation aluminum alloy. The additional brace rod is also a carbon fiber composite hollow tube, and the connecting piece of the additional brace rod is made of aluminum alloy, preferably aviation aluminum alloy. By adopting a truss structure and all pipes are carbon fiber composite hollow tubes, the rigidity of the side thrust bracket is improved and the weight can be effectively reduced.

[0021] According to an exemplary embodiment of the present invention, the main beam, the cross-section web and the diagonal web are connected via a multi-way joint.

[0022] According to a second aspect of the present invention, the present invention discloses a semi-rigid airship, comprising a hull frame and two airship thrust brackets, wherein the airship thrust brackets are symmetrically arranged on both sides of the airship and connected to the hull frame. The thrust brackets are directly connected to the hull frame, so that the propulsion vector and the center of mass of the airship are in the same horizontal plane, which can reduce the ups and downs in flight and improve the stability of flight control.

[0023] According to an exemplary embodiment of the present invention, the connecting piece between the bracing rods on the airship thrust bracket and the connecting piece between the base structural rods are connected to the stiffening ring or longitudinal rod on the hull frame. The double connection of the bracing rods and the base structural rods with the airship frame, coupled with the flexibility of the rods themselves, increases the vibration damping of the bracket and improves the stability of the flight control.

[0024] According to some embodiments of the present invention, by adding side thrust brackets on both sides of the semi-rigid airship, the stability of the semi-rigid airship flight control is enhanced. The advantages of the present invention are described in the following points:

[0025] 1. The present invention symmetrically arranges the airship side thrust brackets on both sides of the airship so that the propulsion vector and the center of mass of the airship are in the same horizontal plane, which can reduce the ups and downs during flight and improve the stability of flight control.

[0026] 2. The airship side thrust bracket of the present invention adopts a truss structure and uses carbon fiber composite hollow tubes and aviation aluminum alloy connectors to improve the rigidity of the side thrust bracket and effectively reduce weight.

[0027] 3. The present invention adopts the double connection of the support rod and the base structural rod with the airship frame, and the flexibility of the rod itself increases the vibration damping of the bracket and improves the stability of the flight control.

[0028] 4. The present invention adopts a combination of cross-sectional web members and diagonal web members to connect the main beams. The cross-sectional web members enhance the rigidity of the main beams, and the diagonal web members enhance the rigidity of the cross-sectional web members and the main beams, thereby enhancing the rigidity of the overall structure.

[0029] 5. The present invention is provided with an additional support rod, which reduces the vibration of the support itself when the airship is propelled.

[0030] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and other objects, features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0032] Figure 1 The overall structural schematic diagram of the airship side thrust bracket of the present invention is shown.

[0033] Figure 2 The front view of the airship side thrust bracket of the present invention is shown.

[0034] Figure 3 A side view of the airship side thrust bracket of the present invention is shown.

[0035] Figure 4 A schematic diagram showing the connection between the airship thrust bracket and the hull frame of the present invention is shown.

[0036] Among them, 1 is the main beam, 2 is the cross-section web, 3 is the diagonal web, 4 is the base structural rod, 5 is the support rod, 6 is the additional support rod, 7 is the longitudinal connector, 8 is the circumferential connector, 9 is the hull frame, and 10 is the airship thrust bracket. DETAILED DESCRIPTION

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the description of the present invention will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The accompanying drawings are merely schematic illustrations of the present invention and are not necessarily drawn to scale.

[0038] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present invention. However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced while omitting one or more of the specific details, or other methods, components, steps, etc. may be adopted. In other cases, known structures, methods, implementations or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0039] As a first embodiment of the present invention, the purpose of the present invention is to disclose an airship side thrust bracket 10, such as Figure 1-3 As shown, the airship thrust support 10 is a truss structure, which adopts 4 main beams 1, 6 groups of cross-sectional webs 2, 5 groups of diagonal webs 3, 4 base structural rods 4, 4 groups of support rods 5, 3 additional support rods 6 and multiple connectors, and the multiple connectors include 4 longitudinal connectors 7, 4 annular connectors 8 and multiple multi-way joints.

[0040] There are four main beams 1, each of which includes a root and a tip. Figure 2 The left end of the middle main beam is the root, and the right end is the tip. The four main beams 1 are arranged horizontally and arranged in a two-layer structure. There are two main beams 1 on each layer. The upper main beam 1 is shorter than the lower main beam 1. The tips of the four main beams 1 are aligned, and the distance between the tips of every two main beams 1 is smaller than the distance between the bases, so that the main beams 1 on the same layer form an eight-shaped structure in pairs.

[0041] There are 4 cross-sectional web members 2 in each group, and there are 24 cross-sectional web members 2 in total in 6 groups. Each group of cross-sectional web members 2 connects the main beams 1 in pairs through connecting parts. The first group of cross-sectional web members 2 connects the roots of the main beams 1 to form an oblique section. The remaining groups of cross-sectional web members 2 starting from the second group are perpendicular to the main beams 1 to form vertical sections. The oblique section formed by the first group of cross-sectional web members 2 has the largest area, the vertical section formed by the second group of cross-sectional web members 2 is smaller in area than that of the first group, the vertical section formed by the third group of cross-sectional web members 2 is smaller in area than that of the second group, and so on.

[0042] Each group of diagonal web members 3 has 4 members, and the five groups of diagonal web members 3 have a total of 20 members. Each group of diagonal web members 3 is arranged between two groups of cross-sectional web members 2 to enhance the rigidity of the overall structure. Each diagonal web member 3 is connected to two main beams 1 and two cross-sectional web members 2 through a multi-way connector.

[0043] There are four base structural rods 4, the middle of each base structural rod 4 is connected to each main beam rod 1 through a connecting piece, and the two ends of the four base structural rods 4 are connected in pairs through longitudinal connecting pieces 7 or annular connecting pieces 8 to form a diamond-shaped base. Figure 3 As shown, there are two longitudinal connectors 7, which are longitudinally arranged at the left and right corners of the diamond base at the middle height, and two circumferential connectors 8, which are circumferentially arranged at the upper and lower corners of the diamond base at the highest point and the lowest point. The connector connecting the two base structural rods 4 is also used to connect with the stiffening ring or longitudinal tie rod on the hull frame of the airship, forming the first connection between the airship side thrust bracket and the hull frame.

[0044] Each group of bracing rods 5 has 2 rods, and the total number of bracing rods 5 in the four groups is 8. One end of the two bracing rods 5 in each group is connected to each other through a longitudinal connector 7 or an annular connector 8, and the other end is connected to the two ends of the second group of cross-sectional web members 2, such as Figure 3 As shown, there are two longitudinal connectors 7, which are longitudinally arranged at the connection of the left and right groups of bracing rods 5 at the middle height, and there are two circumferential connectors 8, which are circumferentially arranged at the connection of the upper and lower groups of bracing rods 5 at the highest and lowest points. The connector connecting the two bracing rods 5 is also used to connect with the stiffening ring or longitudinal tie rod on the hull frame of the airship, forming a second connection between the airship side thrust bracket and the hull frame.

[0045] Three additional support rods 6 are used to reinforce the airship side thrust bracket to reduce the vibration of the bracket itself during propulsion. One of the additional support rods 6 is arranged between the two support rods 5 connected to the lowest main beam 1, and the other two additional support rods 6 are respectively arranged between the two support rods 5 connected to the lowest main beam 1 and the lowest main beam 1.

[0046] Among them, the main beam rod 1, the cross-section web rod 2, the diagonal web rod 3, the base structural rod 4, the brace rod 5 and the additional support rod 6 are all hollow tubes made of carbon fiber composite materials, and the connecting parts are all made of aviation aluminum alloy. The use of these materials can make the airship thrust bracket 10 strong in rigidity and light in weight. Since the airship thrust bracket 10 adopts a truss structure, it has a certain flexibility and is doubly connected to the airship frame, which increases the vibration damping of the bracket and improves the stability of the flight control.

[0047] As a second embodiment of the present invention, the present invention also aims to disclose a semi-rigid airship, such as Figure 4 As shown, it includes a hull frame 9 and two airship thrust brackets 10 of the first embodiment, and the airship thrust brackets 10 are symmetrically arranged on both sides of the airship and connected to the hull frame 9. The airship thrust brackets 10 are directly connected to the hull frame 9, so that the propulsion vector and the center of the airship are in the same horizontal plane, which can reduce the ups and downs in flight and improve the stability of flight control.

[0048] The longitudinal connectors 7 and the annular connectors 8 between the support rods 5 and the base structural rods 4 on the airship thrust bracket 10 are connected to the stiffening ring or the longitudinal tie rod on the hull frame 9. The double connection of the support rods 5 and the base structural rods 4 with the airship frame 9, coupled with the flexibility of the rods themselves, increases the vibration damping of the bracket and improves the stability of the flight control.

[0049] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0050] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An airship thrust bracket, characterized in that: include: A main beam rod (1), a cross-section web rod (2), a diagonal web rod (3), a base structural rod (4), a bracing rod (5) and a plurality of connecting parts; wherein: There are multiple main beams, each of which includes a root and a tip. The main beams are arranged transversely and arranged in a structure of more than two layers. The main beams of each layer are shorter than the main beams of the next layer. The tips of each main beam are aligned, and the distance between the tips of two main beams is smaller than the distance between the roots. There are multiple groups of cross-section web members, and the number of cross-section web members in each group is the same as the number of main beams. The cross-section web members in each group connect the main beams in pairs through connectors, wherein the cross-section web members in the first group connect the roots of the main beams to form an oblique cross-section, and the cross-section web members in the remaining groups are perpendicular to the main beams to form a vertical cross-section; There are multiple groups of diagonal web members, and the number of diagonal web members is one group less than the number of cross-section web members. The number of each group of diagonal web members is the same as the number of main beams. Each group of diagonal web members is arranged between two groups of cross-section web members, and each diagonal web member is connected to two main beams and two cross-section web members through a connecting piece. The number of the base structural rods is the same as that of the main beam rods, the middle of each base structural rod is respectively connected to each main beam rod through a connecting piece, and the two ends of the multiple base structural rods are connected in pairs through connecting pieces to form a diamond-shaped base; There are multiple groups of support rods, each group has two support rods, one end of the two support rods in each group is connected to each other through a connecting piece, and the other end is respectively connected to the two ends of the cross-sectional web of the second group; the connecting piece between the two support rods located at the highest point and the lowest point is an annular connecting piece (8), which is annularly arranged at the upper and lower corners of the diamond base located at the highest point and the lowest point; the connecting piece between the two support rods located at the middle height is a longitudinal connecting piece (7).

2. The airship side thrust bracket according to claim 1, characterized in that: It also includes a plurality of additional support rods (6), which are arranged between two support rods connected to the lowest main beam rod or between the support rod connected to the lowest main beam rod and the lowest main beam rod.

3. The airship side thrust bracket according to claim 1, characterized in that: There are four main beams, and the four main beams are arranged in two layers, with two main beams in each layer.

4. The airship thrust bracket according to claim 1, characterized in that: The cross-section web members are 6 groups.

5. The airship thrust bracket according to claim 1, characterized in that: The main beam, cross-section web, diagonal web, base structural rod and support rod are all hollow tubes made of carbon fiber composite materials, and the connecting parts are made of aluminum alloy.

6. The airship side thrust bracket according to claim 1, characterized in that: The main beam rod, the cross-section web rod and the diagonal web rod are connected through a multi-way joint.

7. A semi-rigid airship, characterized in that: include: A hull frame (9) and two airship thrust brackets (10) as claimed in any one of claims 1 to 6, wherein the airship thrust brackets are symmetrically arranged on both sides of the airship and connected to the hull frame.

8. A semi-rigid airship according to claim 7, characterized in that: The connecting piece between the upper support rods of the airship side thrust bracket and the connecting piece between the base structural rods are connected to the stiffening ring or the longitudinal rod on the hull frame.

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