A spherical radome

Abstract

The present invention discloses a spherical radome, comprising: a space metal truss; and a radome membrane body. Wherein, the radome membrane body is an integral membrane structure covering the outside of the space metal truss; the space metal truss includes a plurality of rods, a plurality of node centers, and a plurality of membrane structure jacking devices; the two ends of adjacent rods are connected by the node centers to form a sphere; one of the membrane structure jacking devices is installed in each node center; the membrane structure jacking device is in contact with the radome membrane body. By adjusting the pre-tension of the radome membrane body, which is an integral membrane structure covering the outside of the space metal truss, through the membrane structure jacking device, the spherical radome has excellent electrical performance and mechanical performance. Moreover, the spherical radome has an integral membrane surface in space, improving the reliability of sealing, reducing the risk of rain leakage of the spherical radome, and providing a reliable operating environment for the radar.

Description

Technical Field

[0001] The present invention relates to the technical field of radar radomes, and particularly to a spherical radome. Background Art

[0002] Metal truss radomes are widely used, with sizes that can be large or small. They can withstand large wind loads, have high structural reliability, good electrical performance, and are suitable for large high-frequency radar systems. The metal truss radomes in related technologies are usually independent triangular unit block type metal truss radomes. The independent triangular unit block type metal truss radome is composed of a plurality of triangular rib units spliced together, and each triangular rib unit has an independent skin. However, this independent triangular unit block type metal truss radome has more seams, a large amount of work and high construction difficulty for sealing the spatial gaps, and there is a risk of rain leakage in the radome.

[0003] In addition, as the size of the radome increases, in order to reduce the blocking ratio of the metal truss to the antenna aperture, the size of the triangular unit block will exceed the limit of the conventional transportation unit. Moreover, the triangular unit block covered with skin is very easy to be damaged during transportation and erection. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a spherical radome to overcome the above problems.

[0005] Embodiments of the present invention provide a spherical radome, including: a spatial metal truss; and a radome membrane body. Wherein, the radome membrane body is an integral membrane structure covering the outside of the spatial metal truss; the spatial metal truss includes a plurality of rods, a plurality of node centers, and a plurality of membrane structure jacking devices; the two ends of adjacent rods are connected by the node centers to form a spherical shape; one of the membrane structure jacking devices is installed in each node center; the membrane structure jacking device is in contact with the radome membrane body.

[0006] Optionally, the membrane structure jacking device includes a top plate, a screw rod, and a fastener; the screw rod is arranged in the node center; the fasteners on both sides of the node center fix the screw rod in the node center and adjust the elongation of the screw rod relative to the node center; the top plate is arranged at one end of the fastener and jacks up the radome membrane body.

[0007] Optionally, the top plate is made of spherical polytetrafluoroethylene; the top plate jacks up the radome membrane body so that the membrane surface prestress of the radome membrane body is between 2 kN and 4 kN.

[0008] Optionally, each rod is connected to the node center by a pin bolt or a bolt.

[0009] Optionally, the radome membrane body includes a plurality of single-piece membrane bodies; each single-piece membrane body includes a main body membrane, a buried rope, a reinforcing membrane, and a connecting band; the buried ropes are pre-buried at the peripheral edges of each single-piece membrane body; the reinforcing membranes are disposed at the top and bottom of the main body membrane; the connecting bands are heat-sealed to the two side edges of each single-piece membrane body; the connecting bands between two adjacent single-piece membrane bodies are connected and tightened by tying ropes, so that the plurality of single-piece membrane bodies are tensioned into an integral membrane structure.

[0010] Optionally, the spherical radome further includes a waterproof membrane; the waterproof membrane is heat-sealed to the outside of the joint between two adjacent single-piece membrane bodies.

[0011] Optionally, the spherical radome further includes a ventilation skylight, a lightning protection device, and a foundation ring wall; the space metal truss is installed on the foundation ring wall; the ventilation skylight and the lightning protection device are installed on the top of the space metal truss; the space metal truss further includes a foundation ring beam, radome embedded parts, supports, and bottom membrane structure members; the foundation ring beam, the bottom membrane structure members, and the supports are sequentially arranged on the foundation ring beam and fixed by the radome embedded parts pre-buried in the foundation ring wall; one end of the rod adjacent to the foundation ring beam is connected to the support, and the other end is connected to the corresponding node center; and the two ends of the rod far from the foundation ring beam are respectively connected to different node centers; the radome membrane body is respectively connected to the ventilation skylight, the lightning protection device, and the bottom membrane structure members.

[0012] Optionally, the fixed interface between the single-piece membrane body at the top of the spherical radome and the edge of the ventilation skylight is connected by a backing plate; the single-piece membrane body at the bottom of the spherical radome is connected to the bottom membrane structure member on the foundation ring wall by a backing plate.

[0013] Optionally, the top view of the ventilation skylight and the lightning protection device is a regular polygon; the number of single-piece membrane bodies is the same as the number of sides of the regular polygon.

[0014] Optionally, the radome membrane body is made of a high-strength polyester fiber membrane material or a wave-transparent high-strength weather-resistant membrane material; the surface of the radome membrane body is coated with a fluoroplastic coating.

[0015] According to the spherical radome in the embodiments of the present invention, the pre-tension of the radome membrane body of the integral membrane structure covering the outside of the space metal truss can be adjusted by a membrane structure jacking device, so that the spherical radome has excellent electrical performance and mechanical performance. Moreover, the spherical radome is an integral space membrane surface, which improves the reliability of sealing, reduces the risk of rain leakage of the spherical radome, and provides a reliable operating environment for the radar. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The front view of a spherical radome provided for the embodiments of the present invention;

[0018] Figure 2 For Figure 1 The top view of the spherical radome shown;

[0019] Figure 3 For Figure 1 The structural schematic diagram of the spherical radome shown;

[0020] Figure 4 For Figure 1 The structural schematic diagram of the metal truss in the spherical radome shown;

[0021] Figure 5 For Figure 1 The structural schematic diagram at the foundation ring beam in the spherical radome shown;

[0022] Figure 6 For Figure 5 The enlarged schematic diagram of the partial section at the foundation ring beam shown;

[0023] Figure 7 For Figure 4 The schematic diagram of the connection relationship between the rod and the node center in the metal truss shown;

[0024] Figure 8 For Figure 4 The schematic diagram of the connection relationship between the rod, the node center and the membrane structure jacking device in the metal truss shown;

[0025] Figure 9 For Figure 8 The enlarged schematic diagram of the membrane structure jacking device shown;

[0026] Figure 10 For Figure 8 The schematic diagram of the membrane structure jacking device applying prestress to the membrane surface shown;

[0027] Figure 11 For Figure 1 The schematic diagram of the connection relationship between the ventilation skylight and the metal truss in the spherical radome shown;

[0028] Figure 12 For Figure 1 The enlarged schematic diagram of the ventilation skylight in the spherical radome shown;

[0029] Figure 13 is Figure 12 the top view of the ventilation skylight in the middle;

[0030] Figure 14 is Figure 1 the distribution schematic diagram of single-piece film bodies in the antenna radome film body of the spherical antenna radome shown;

[0031] Figure 15 is Figure 14 the projection cutting layout schematic diagram of the single-piece film body shown;

[0032] Figure 16 is Figure 14 the schematic diagram of the binding rope film edge treatment of the single-piece film body shown;

[0033] Figure 17 is Figure 15 the schematic diagram of the top film surface strengthening of the area ④ shown; and

[0034] Figure 18 is Figure 15 the schematic diagram of the corner film surface strengthening of the area ② shown. Specific embodiments

[0035] The present invention will be further described in detail below in conjunction with embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0036] Figure 1 is the front view of a spherical antenna radome provided by an embodiment of the present invention. Figure 2 is Figure 1 the top view of the spherical antenna radome shown. Figure 3 is Figure 1 the structural schematic diagram of the spherical antenna radome shown. Refer to Figures 1 to 3 , the spherical antenna radome includes an antenna radome film body 1, a space metal truss 2, a ventilation skylight and a lightning protection device 3, and a foundation ring wall 4. Among them, the space metal truss 2 is installed on the foundation ring wall 4; the ventilation skylight and the lightning protection device 3 are installed on the top of the space metal truss 2; the antenna radome film body 1 is an integral membrane structure covering the outside of the space metal truss 2.

[0037] Refer to Figures 4 to 8 , the space metal truss 2 includes a foundation ring beam 11, an antenna radome embedded part 12, a node center 13, a support 14, a member 15, a membrane structure jacking device 16 and a bottom film tensioning member 31.

[0038] Among them, as Figure 4As shown, the radome embedded part 12 can be embedded in the foundation ring wall 4 during the construction of the foundation ring wall 4. The foundation ring beam 11, the bottom membrane structure member 31 and the support 14 are sequentially arranged on the foundation ring wall 4, and the radome embedded part 12 is made to pass through the foundation ring beam 11, the bottom membrane structure member 31 and the support 14, and then the foundation ring beam 11, the bottom membrane structure member 31 and the support 14 are fixed on the foundation ring wall 4 by nuts 23 and washers 24.

[0039] One end of the rod member 15 close to the foundation ring wall 4 is connected to the support 14, and the other end is connected to the corresponding node center 13; while both ends of the rod member 15 far from the foundation ring wall 4 are respectively connected to different node centers 13. In this way, the rod member 15 and the node center 13 can be assembled according to a preset division rule to form the space metal truss 2, and a set of the membrane structure jacking device 16 is installed at each node center 13.

[0040] In one embodiment, the space metal truss 2 is divided into blocks in accordance with a preset division rule of random distribution of triangular units, as few types of ribs as possible, and uniform rib lengths. For example, the basic rules can be set by computer-aided design: the included angle between adjacent ribs is not less than 35°, the number of ribs converging at a single node is not more than 9, the length range of the ribs is set, the evaluation criteria are set, and the random and uniform division is achieved by the method of dynamically micro-adjusting the nodes. For example, a division method includes: First, the spherical surface is divided into 20 spherical regular icosahedrons, and the blocking ratio range is initially determined according to the electrical performance requirements; then, the average area of the triangular unit blocks is determined, so as to obtain the total number of triangular unit blocks of the whole radome; after that, the basic refinement period is selected and affine transformation is performed. In one embodiment, for the space metal truss 2 obtained in the above manner, for a metal truss ground radar radome with a diameter of 56m, after cutting the sphere by 90%, the total number of rod members 15 is 1520, the total number of node centers 13 is 521, the total number of triangles formed by the rod members 15 is 1000, the longest rod member 15 is 5.94 meters, the shortest rod member 15 is 2.84 meters, at most 9 rod members 15 converge at one node center 13, and at least 4 rod members 15 converge at one node center 13.

[0041] Figure 7 It is a schematic diagram of the connection relationship between the rod member 15 and the node center 13. As Figure 7As shown, one, two or more pin holes are provided at the end of each rod member 15. Each rod member 15 and the node center 13 can be connected by a pin bolt 17 passing through the pin holes in the node center 13 and the pin holes in the rod member 15. To prevent connection failure, an open split pin 18 can be installed at the end of the pin bolt 17. By controlling the matching dimensions of the pin holes in the rod member 15 and the node center 13 and the pin bolt 17, the assembly accuracy of the space metal truss 2 can be ensured. In an embodiment, the rod member 15 and the node center 13 can also be connected by bolts.

[0042] As Figures 8 to 10 shown, a set of the membrane structure jacking device 16 is installed at each node center 13. The membrane structure jacking device 16 includes a top plate 21, a screw rod 22, fasteners such as nuts 23 and gaskets 24.

[0043] The screw rod 22 can be a high-strength screw rod. The screw rod 22 is inserted into the hole in the node center 13. The screw rod 22 is fixed in the node center 13 by the nuts 23 located on both sides of the node center 13. By adjusting the nuts 23 on both sides of the node center 13, the elongation of the screw rod 22 relative to the node center 13 (when in the Figure 8 shown position, the elongation of the screw rod 22 relative to the upper part of the node center 13) can be adjusted, that is, the jacking amount of the membrane structure jacking device 16 on the radome membrane body 1 is adjusted. The top plate 21 is arranged at one end of the screw rod 22 for jacking the radome membrane body 1. The top plate 21 can be made of spherical polytetrafluoroethylene to prevent abrasion of the radome membrane body 1.

[0044] As Figures 11 to 13 shown, the top view of the ventilation skylight and lightning protection device 3 is a regular pentagon. It can be understood that the top view of the ventilation skylight and lightning protection device 3 can also be other polygons or regular polygons, and the number of sides of the polygon can be determined by the specific structure of the radome membrane body 1 (which will be further described below). The ventilation skylight and lightning protection device 3 can be fixed to the top of the space metal truss 2 through the rod clamp at its bottom leg. Fixed interfaces 90 for the radome membrane body 1 are left at the five edges of the ventilation skylight, and a lightning protection device and a navigation warning light are installed on the top of the ventilation skylight.

[0045] As Figure 6 , Figure 14 and Figure 15 shown, the radome membrane body 1 is tensioned into an integral membrane structure by a plurality of single-piece membrane bodies 41. In Figure 14In the illustrated embodiment, the radome membrane body 1 can be formed by tensioning 5 identical single-piece membrane bodies 41. It should be noted that the number of the single-piece membrane bodies 41 can be designed according to needs. For example, the number of the single-piece membrane bodies 41 can be the same as the number of sides of the regular polygon in the top view of the ventilation skylight and lightning protection device 3. The top and bottom membrane edges of the single-piece membrane body 41 are respectively pre-buried with buried ropes 43, and local strengthening treatment is performed. The fixed interface 90 of the single-piece membrane body 41 at the top of the spherical radome and the pentagonal edge of the ventilation skylight is connected by a backing plate 32; and the single-piece membrane body 41 is connected to the bottom tensioning membrane structure member 31 on the foundation ring wall 4 by a backing plate 32 at the bottom of the spherical radome. In Figure 6 In the illustrated embodiment, the backing plate 32 and the bottom tensioning membrane structure member 31 can be fixedly connected by a bolt connecting fastener 33. In addition, it should be noted that all the edges of the structural members in contact with the single-piece membrane body 41 are all rounded to prevent the edges from wearing the radome membrane body 1.

[0046] As Figures 15 to 18 shown, the single-piece membrane body 41 includes a main body membrane 44, a buried rope 43, a reinforcing membrane 47 and a connecting band 46. The main body membrane 44 can be formed by thermally welding and splicing a plurality of standard membrane materials 48. The buried ropes 43 are pre-buried at the peripheral membrane edges of the single-piece membrane body 41. The top and bottom corners of the main body membrane 44 are locally strengthened by the reinforcing membrane 47 to prevent the main body membrane 44 from being damaged due to excessive local stress. The top and bottom of the main body membrane 44 refer to the parts of the main body membrane 44 close to the ventilation skylight and lightning protection device 3 and the foundation ring wall 4 respectively.

[0047] The connecting bands 46 are thermally welded to the two side membrane edges of each single-piece membrane body 41. As Figure 16 shown, the connecting bands 46 between two adjacent single-piece membrane bodies 41 are connected and tightened by a binding rope 42, so that a plurality of single-piece membrane bodies 41 can be tensioned into an integral membrane structure. In addition, a splicing joint waterproof membrane 45 is further thermally welded to the outside of the splicing joint between two adjacent single-piece membrane bodies 41 (i.e., the joint where the connecting bands 46 between two adjacent single-piece membrane bodies 41 are connected by the binding rope 42), so that the radome membrane body 1 becomes a closed space integral membrane surface with a seamless structure on its surface, thereby effectively preventing rain and wind and sand, improving the reliability of sealing, reducing the risk of rain leakage of the radome, and providing a reliable operating environment for the radar.

[0048] After covering the radome membrane body 1 outside the space metal truss 2, the jacking amount of some or all of the membrane structure jacking devices 16 can be adjusted, so that the radome membrane body 1 can be jacked and tensioned locally or integrally as needed, making the radome membrane body 1 in a tensioned state, thereby improving the bearing capacity of the radome membrane body 1. In one embodiment, the membrane surface prestress of the membrane structure jacking device 16 on the radome membrane body 1 can be between 2 kN and 4 kN, and the bearing capacity of the radome membrane body 1 is the best.

[0049] In one embodiment, the radome membrane body 1 can be made of high-strength polyester fiber PVDF membrane material, or other wave-transparent, high-strength and weather-resistant membrane materials that are easy to heat-seal. The PVDF membrane material is coated with a fluoroplastic coating, which has the characteristics of self-cleaning, hydrophobicity, anti-aging, ultraviolet radiation resistance, and long service life, helping to improve the ability of the spherical radome to resist harsh climates, corrosion, and aging.

[0050] In one embodiment, the diameter of the spherical radome is 56 meters, the truncated sphere form is 90%, the diameter of the foundation ring beam is 33.6 meters, the material of the radome membrane body 1 is 0.8 mm thick polyester fiber PVDF membrane material, the main material of the space metal truss 2 is Q345 steel, the rainproof seal is reliable, it can meet the protection requirements of large ground radars in the high-frequency band, and has excellent electrical and structural properties.

[0051] Although the principle of the present invention has been described in detail above in conjunction with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are only explanations of the schematic implementation modes of the present invention, and not limitations on the scope of the present invention. The details in the embodiments do not constitute limitations on the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple substitutions based on the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A spherical antenna cover, It is characterized in that include: Space metal trusses; and Radome membrane body; Wherein, the antenna cover membrane body is an integral membrane structure covering the outside of the spatial metal truss, and the integral membrane structure is a closed spatial integral membrane surface, and its surface is a seamless structure; The spatial metal truss comprises a plurality of rods, a plurality of node hubs and a plurality of membrane structure lifting devices; the two ends of the adjacent rods are connected by the node hubs to form a sphere; and one membrane structure lifting device is installed in each node hub; The membrane structure lifting device is in contact with the antenna cover membrane body.

2. The spherical antenna cover according to claim 1, It is characterized in that The membrane structure lifting device comprises a top plate, a screw rod and a fastener; The screw rod is inserted into the node hub; The fasteners located on both sides of the node hub fix the screw rod in the node hub and adjust the elongation of the screw rod relative to the node hub; The top plate is arranged at one end of the fastener and lifts up the antenna cover membrane body.

3. The spherical antenna cover according to claim 2, It is characterized in that The top plate is made of spherical polytetrafluoroethylene; the top plate lifts the antenna cover membrane body so that the membrane surface prestress of the antenna cover membrane body is between 2kN and 4kN.

4. The spherical antenna cover according to claim 2, It is characterized in that Each of the rods is connected to the node hub via a pin or a bolt.

5. The spherical radome according to any one of claims 1 to 4, It is characterized in that The radome membrane body comprises a plurality of single-piece membrane bodies; The single-piece membrane body includes a main membrane, an embedded rope, a reinforcing membrane and a connecting belt; the embedded ropes are pre-embedded in the membrane edges around the single-piece membrane body; the reinforcing membrane is arranged on the top and bottom of the main membrane; the connecting belts are heat-sealed on the membrane edges on both sides of each single-piece membrane body; the connecting belts between two adjacent single-piece membrane bodies are connected and tightened by binding ropes, so that multiple single-piece membrane bodies are stretched into an integral membrane structure.

6. The spherical antenna cover according to claim 5, It is characterized in that The spherical antenna cover also includes a waterproof membrane; the waterproof membrane is seamed by heat-sealing at the outside of the joint between two adjacent single-piece membrane bodies.

7. The spherical antenna cover according to claim 5, It is characterized in that The spherical antenna cover also includes a ventilation skylight, a lightning protection device and a foundation ring wall; The space metal truss is installed on the foundation ring wall; the ventilation skylight and lightning protection device are installed on the top of the space metal truss; The spatial metal truss also includes a foundation ring beam, an embedded part of the radome, a support and a bottom membrane structure; The foundation ring beam, the bottom membrane structure and the support are sequentially arranged on the foundation ring beam and fixed through the antenna cover embedded parts embedded in the foundation ring wall; One end of the rod member adjacent to the foundation ring beam is connected to the support, and the other end is connected to the corresponding node hub; The two ends of the rod member far away from the foundation ring beam are respectively connected to different node hubs; The radome membrane body is respectively connected to the ventilation skylight, the lightning protection device and the bottom film structure member.

8. The spherical radome according to claim 7, characterized in that the fixing interface at the edge of the ventilation skylight at the top of the spherical radome of the single-piece membrane body is connected by a backing plate; the single-piece membrane body at the bottom of the spherical radome is connected to the bottom film structure member on the foundation ring wall by a backing plate.

9. The spherical radome according to claim 7, characterized in that the top view of the ventilation skylight and the lightning protection device is a regular polygon; the number of the single-piece membrane bodies is the same as the number of sides of the regular polygon.

10. The spherical radome according to claim 7, characterized in that the radome membrane body is made of a high-strength polyester fiber film material or a wave-transparent high-strength weather-resistant film material; the surface of the radome membrane body is coated with a fluoroplastic coating.

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