CN111490350A

CN111490350A - Spherical antenna housing

Info

Publication number: CN111490350A
Application number: CN202010363810.9A
Authority: CN
Inventors: 唐宝富; 宋志国; 逯建伟; 操卫忠; 唐守柱
Original assignee: CETC 14 Research Institute
Current assignee: CETC 14 Research Institute
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-08-04

Abstract

The invention discloses a spherical antenna housing, comprising: a space metal truss; and a radome film body. The antenna housing membrane body is an integral membrane structure covering the outer side of the space metal truss; the space metal truss comprises a plurality of rods, a plurality of node hubs and a plurality of membrane structure jacking devices; two ends of the adjacent rod pieces are connected through the node center to form a sphere; each node center is provided with one membrane structure jacking device; the membrane structure jacking device is in contact with the radome membrane body. The pretension of the radome membrane body of the integral membrane structure covering the outer side of the space metal truss is adjusted through the membrane structure jacking device, so that the spherical radome has excellent electrical property and mechanical property. In addition, the spherical antenna housing is a space integral membrane surface, so that the sealing reliability is improved, the rain leakage risk of the spherical antenna housing is reduced, and a reliable operation environment is provided for the radar.

Description

Spherical antenna housing

Technical Field

The invention relates to the technical field of radar antenna covers, in particular to a spherical antenna cover.

Background

The metal truss antenna housing has the advantages of wide application, changeable size, capability of bearing larger wind load, high structural reliability and good electrical property, and can be suitable for large-scale high-frequency-band radar systems. The metal truss radome in the related art is generally an independent triangular unit block type metal truss radome. The independent triangular unit block type metal truss antenna housing is formed by splicing a plurality of triangular rib units, and each triangular rib unit is provided with an independent covering. However, the independent triangular unit block type metal truss radome has more joints, the sealing construction workload of space gaps is large, the construction difficulty is high, and the risk of rain leakage of the radome exists.

Furthermore, as the size of the radome becomes larger, the size of the triangular unit block exceeds the conventional transportation unit limit in order to reduce the blocking ratio of the metal truss to the antenna aperture. Moreover, the triangular unit blocks covered with the skins are very easy to damage during transportation and erection.

Disclosure of Invention

Accordingly, embodiments of the present invention provide a spherical radome to overcome the above problems.

The embodiment of the invention provides a spherical antenna housing, which comprises: a space metal truss; and a radome film body. The antenna housing membrane body is an integral membrane structure covering the outer side of the space metal truss; the space metal truss comprises a plurality of rods, a plurality of node hubs and a plurality of membrane structure jacking devices; two ends of the adjacent rod pieces are connected through the node center to form a sphere; each node center is provided with one membrane structure jacking device; the membrane structure jacking device is in contact with the radome membrane body.

Optionally, the membrane structure jacking device comprises a top plate, a screw and a fastener; the screw rod penetrates through the node center; the fasteners on two 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 the radome membrane body.

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 2kN and 4 kN.

Optionally, each rod member is connected to the node hub by a pin or a bolt.

Optionally, the radome membrane comprises a plurality of monolithic membranes; the single membrane body comprises a main body membrane, a buried rope, a reinforcing membrane and a connecting belt; the buried ropes are embedded in the peripheral film edges of the single film body; the reinforcing films are arranged at the top and the bottom of the main body film; the connecting bands are thermally sealed at the film edges on the two sides of each single film body; the connecting bands between two adjacent single film bodies are connected and tightened through binding ropes, so that the single film bodies are stretched into an integral film structure.

Optionally, the radome further comprises a waterproof membrane; and the waterproof membrane is heat-sealed and spliced at the outer part of the spliced part between two adjacent single membrane bodies.

Optionally, the spherical radome further comprises a ventilation skylight, a lightning arrester and a foundation ring wall; the space metal truss is arranged on the foundation ring wall; the ventilating skylight and the lightning arrester are arranged at the top of the space metal truss; the space metal truss also comprises a basic ring beam, an antenna housing embedded part, a support and a bottom film drawing structural part; the foundation ring beam, the bottom film-drawing structural part and the support are sequentially arranged on the foundation ring beam and fixed through the antenna housing embedded part embedded in the foundation ring wall; one end of the rod piece adjacent to the basic ring beam is connected with the support, and the other end of the rod piece is connected with the corresponding node center; two ends of the rod piece far away from the basic ring beam are respectively connected with different node hubs; the radome membrane body is respectively connected with the ventilation skylight, the lightning arrester and the bottom film pulling structural member.

Optionally, the single-piece film body is connected with a fixing interface at the top of the spherical radome and the edge of the ventilation skylight by using a base plate; the single-piece membrane body is arranged at the bottom of the spherical antenna housing and connected with the bottom film pulling structural part on the foundation ring wall through a base plate.

Optionally, the top view of the ventilation skylight and the lightning arrester is in a regular polygon shape; the number of the single membrane bodies is the same as the number of the sides of the regular polygon.

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

According to the spherical radome in the embodiment of the invention, the pretension of the radome membrane body of the integral membrane structure covering the outer side of the space metal truss can be adjusted through the membrane structure jacking device, so that the spherical radome has excellent electrical property and mechanical property. In addition, the spherical antenna housing is a space integral membrane surface, so that the sealing reliability is improved, the rain leakage risk of the spherical antenna housing is reduced, and a reliable operation environment is provided for the radar.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a front view of a spherical radome provided in an embodiment of the present invention;

fig. 2 is a top view of the radome of fig. 1;

fig. 3 is a schematic structural diagram of the spherical radome shown in fig. 1;

fig. 4 is a schematic structural diagram of a metal truss in the spherical radome shown in fig. 1;

fig. 5 is a schematic structural diagram of the spherical radome shown in fig. 1 at the position of a basic ring beam;

FIG. 6 is an enlarged partial cross-sectional view of the foundation ring beam of FIG. 5;

fig. 7 is a schematic view illustrating a connection relationship between the bar member and the node center in the metal truss shown in fig. 4;

fig. 8 is a schematic view illustrating a connection relationship between the rod member, the node center and the membrane structure lifting device in the metal truss shown in fig. 4;

FIG. 9 is an enlarged schematic view of the membrane structure jacking apparatus shown in FIG. 8;

FIG. 10 is a schematic view of the membrane structure lifting apparatus shown in FIG. 8 pre-stressing a membrane surface;

fig. 11 is a schematic view showing a connection relationship between a ventilation skylight and a metal truss in the spherical radome shown in fig. 1;

fig. 12 is an enlarged schematic view of a vent louver in the spherical radome of fig. 1;

FIG. 13 is a top view of the ventilation skylight of FIG. 12;

fig. 14 is a schematic view of the distribution of a single membrane in the antenna radome membrane in the radome of fig. 1;

FIG. 15 is a schematic view of a projected trim layout of the monolithic membrane body of FIG. 14;

FIG. 16 is a schematic view of a lacing film edge treatment of the monolithic film body of FIG. 14;

FIG. 17 is a schematic illustration of the top film face enhancement of zone ④ shown in FIG. 15, an

Fig. 18 is a schematic view of corner film face reinforcement of region ② shown in fig. 15.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Fig. 1 is a front view of a spherical radome according to an embodiment of the present invention. Fig. 2 is a top view of the radome shown in fig. 1. Fig. 3 is a schematic structural diagram of the spherical radome shown in fig. 1. Referring to fig. 1 to 3, the radome includes a radome membrane 1, a space metal truss 2, a ventilation skylight and lightning protection device 3, and a foundation ring wall 4. Wherein the space metal truss 2 is installed on the foundation ring wall 4; the ventilating skylight and the lightning arrester 3 are arranged at the top of the space metal truss 2; the radome membrane body 1 is an integral membrane structure covering the outer side of the space metal truss 2.

Referring to fig. 4 to 8, the space metal truss 2 includes a foundation ring beam 11, a radome embedment 12, a node center 13, a support 14, a rod member 15, a membrane structure jacking device 16 and a bottom tension membrane structural member 31.

As shown in fig. 4, the radome embedment 12 may be embedded in the foundation ring wall 4 in the process of constructing the foundation ring wall 4. The foundation ring beam 11, the bottom film-drawing structural part 31 and the support 14 are sequentially arranged on the foundation ring beam 4, and the antenna cover embedded part 12 penetrates through the foundation ring beam 11, the bottom film-drawing structural part 31 and the support 14 and then is fixed on the foundation ring beam 4 through a nut 23 and a gasket 24.

One end of the rod piece 15 close to the basic ring beam 4 is connected with the support 14, and the other end is connected with the corresponding node center 13; and the two ends of the rod member 15 far away from the basic ring beam 4 are respectively connected with different node hubs 13. In this way, the rod members 15 and the node hubs 13 can be assembled according to preset division rules to form the space metal truss 2, and a set of membrane structure jacking device 16 is installed at each node hub 13.

In one embodiment, the space metal truss 2 blocks comply with a preset division rule that the triangular units are randomly distributed, the types of the ribs are as few as possible, and the lengths of the ribs are uniform. For example, basic rules may be set using computer aided design: the included angle of adjacent ribs is not less than 35 degrees, the number of ribs collected by a single node is not more than 9, the length range of the ribs is set, evaluation standards are set, and random uniform division is realized by a method of dynamically fine-tuning the nodes. For example, one partitioning method includes: firstly, dividing a spherical surface into 20 spherical surface regular icosahedrons, and preliminarily determining the range of the blocking ratio according to the electrical property requirement; then, determining the average area of the triangular unit blocks so as to obtain the number of the whole cover of the triangular unit blocks; thereafter, a basic thinning cycle is selected and affine processing is performed. In an embodiment, after 90% of the truncated spheres are obtained for the metal truss ground radome with a diameter of 56m in the space metal truss 2 according to the above manner, the total number of the rod pieces 15 is 1520, the total number of the node hubs 13 is 521, the total number of triangles formed by the rod pieces 15 is 1000, the longest rod piece 15 is 5.94 meters, the shortest rod piece 15 is 2.84 meters, at most 9 rod pieces 15 converge at one hub node 13, and at least 4 rod pieces 15 converge at one hub node 13.

Fig. 7 is a schematic diagram of the connection relationship between the rod member 15 and the node hub 13. As shown in fig. 7, the end of each rod member 15 is provided with one, two or more pin holes, and each rod member 15 and the node hub 13 can be connected by a pin 17 inserted into the pin hole of the node hub 13 and the pin hole of the rod member 15. To prevent connection failure, a cotter pin 18 may be installed at the end of the cotter 17. By controlling the fit size of the pin holes and the pin bolts 17 in the rod member 15 and the node hub 13, the assembly accuracy of the space metal truss 2 can be ensured. In one embodiment, the rod 15 and the node hub 13 may be connected by bolts.

As shown in fig. 8 to 10, a set of the membrane structure jacking device 16 is installed at each node hub 13. The membrane structure jacking device 16 includes a top plate 21, a threaded rod 22, a fastener such as a nut 23, and a washer 24.

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

As shown in fig. 11 to 13, the top view of the ventilation louver and the lightning arrester 3 is a regular pentagon. It is understood that the top view of the ventilation skylight and the lightning protection device 3 may also have other polygonal or regular polygonal shapes, and the number of the polygonal shapes may be determined by the specific structure of the radome film body 1 (which will be further described below). The ventilation skylight and lightning protection device 3 can be fixed on the top of the space metal truss 2 through a rod clamp at the bottom supporting leg of the ventilation skylight and lightning protection device. Five edges of the ventilation skylight are provided with the fixed interfaces 90 of the radome film body 1, and the top of the ventilation skylight is provided with a lightning arrester and a navigation warning lamp.

As shown in fig. 6, 14 and 15, the radome membrane 1 is stretched into an integral membrane structure by a plurality of single-piece membrane bodies 41. In the embodiment shown in fig. 14, the radome membrane 1 may be stretched from 5 identical monolithic membranes 41. It should be noted that the number of the single-piece film bodies 41 may be designed as needed, for example, the number of the single-piece film bodies 41 may be the same as the number of sides of the regular polygon in the top view of the skylight and lightning arrester 3. The top and bottom film edges of the single film body 41 are respectively embedded with embedded ropes 43 and are locally reinforced. The single-piece membrane body 41 is connected with a fixed interface 90 at the edge of the pentagon of the ventilation skylight at the top of the spherical radome by adopting a base plate 32; and, the single-piece film body 41 is connected to the bottom drawing film structure 31 on the foundation annular wall 4 at the bottom of the spherical radome by using a backing plate 32. In the embodiment shown in fig. 6, the backing plate 32 and the bottom film-drawing structural member 31 may be fixedly connected by a bolt-on fastener 33. In addition, it should be noted that all the structural member edges contacting the single film body 41 are processed by circular arc treatment to prevent the edges from wearing the radome film body 1.

As shown in fig. 15 to 18, the single film body 41 includes a main body film 44, a buried string 43, a reinforcing film 47, and a connecting tape 46. The body film 44 can be formed by heat-sealing and splicing a plurality of standard films 48. The buried ropes 43 are embedded in the peripheral film edges of the single film body 41. The two corners of the top and the bottom of the main body film 44 are locally reinforced by the reinforcing films 47, so that the main body film 44 is prevented from being damaged due to too large local stress. The top and bottom of the main body film 44 refer to portions of the main body film 44 near the ventilation louver and lightning arrester 3 and the foundation surround wall 4, respectively.

The connecting strips 46 are heat-sealed at the film edges at both sides of each single-piece film body 41. As shown in fig. 16, the connection bands 46 between two adjacent single film bodies 41 are connected and tightened by the binding strings 42, so that a plurality of single film bodies 41 can be tensioned into a unitary film structure. In addition, the outside of the splicing part between the two adjacent single-piece film bodies 41 (namely, the connecting band 46 between the two adjacent single-piece film bodies 41 passes through the joint of the binding rope 42) is further heat-sealed and spliced by the waterproof film 45, so that the radome film body 1 becomes a closed space integral film surface, the surface of the radome film body is of a seamless structure, rain and sand can be effectively prevented, the sealing reliability is improved, the risk of rain leakage of the radome is reduced, and a reliable running environment is provided for radars.

Will the radome membrane body 1 covers behind the space metal truss 2 outside, can adjust part or whole the jacking volume of membrane structure jacking device 16 to can be right as required the radome membrane body 1 is locally or wholly carry out the top and stretch-draw, makes radome membrane body 1 is in the tensioning state, thereby improves radome membrane body 1's bearing capacity. In an embodiment, the membrane structure jacking device 16 may pre-stress the membrane surface of the radome membrane body 1 between 2kN and 4kN, and the load-bearing capacity of the radome membrane body 1 is the best.

In an embodiment, the radome film body 1 may be made of a high-strength polyester fiber PVDF film, or may be made of other wave-transparent high-strength weather-resistant films that are convenient for heat sealing. The surface of the PVDF film material is coated with a fluoroplastic coating, so that the spherical radome has the characteristics of self-cleaning property, hydrophobicity, ageing resistance, ultraviolet radiation resistance, long service life and the like, and is favorable for improving the capabilities of the spherical radome in resisting severe weather, corrosion and ageing.

In one embodiment, the diameter of the spherical antenna housing is 56 meters, the truncated spherical form is 90%, the diameter of the basic ring beam is 33.6 meters, the antenna housing film body 1 is made of polyester fiber PVDF film with the thickness of 0.8mm, the main body material of the space metal truss 2 is Q345 steel, the rain-proof sealing is reliable, the protection requirement of a high-frequency large ground radar can be met, and the spherical antenna housing has excellent electrical performance and structural performance.

While the principles of the invention have been described in detail in connection with the preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing embodiments are merely illustrative of exemplary implementations of the invention and are not limiting of the scope of the invention. The details of the embodiments are not to be interpreted as limiting the scope of the invention, and any obvious changes, such as equivalent alterations, simple substitutions and the like, based on the technical solution of the invention, can be interpreted without departing from the spirit and scope of the invention.

Claims

1. A spherical radome, comprising:

a space metal truss; and

a radome membrane body;

the antenna housing membrane body is an integral membrane structure covering the outer side of the space metal truss;

the space metal truss comprises a plurality of rods, a plurality of node hubs and a plurality of membrane structure jacking devices; two ends of the adjacent rod pieces are connected through the node center to form a sphere; each node center is provided with one membrane structure jacking device;

the membrane structure jacking device is in contact with the radome membrane body.

2. The radome of claim 1, wherein the membrane structure jacking device includes a top plate, a screw, and a fastener;

the screw rod penetrates through the node center;

the fasteners on two 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 the radome membrane body.

3. The spherical radome of claim 2, wherein 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 2kN and 4 kN.

4. The radome of claim 2, wherein each rod is connected to the node hub by a pin or bolt.

5. The spherical radome of any one of claims 1-4, wherein the radome membrane comprises a plurality of monolithic membranes;

the single membrane body comprises a main body membrane, a buried rope, a reinforcing membrane and a connecting belt; the buried ropes are embedded in the peripheral film edges of the single film body; the reinforcing films are arranged at the top and the bottom of the main body film; the connecting bands are thermally sealed at the film edges on the two sides of each single film body; the connecting bands between two adjacent single film bodies are connected and tightened through binding ropes, so that the single film bodies are stretched into an integral film structure.

6. The radome of claim 5, further comprising a waterproof membrane; and the waterproof membrane is heat-sealed and spliced at the outer part of the spliced part between two adjacent single membrane bodies.

7. The radome of claim 5, further comprising a ventilation skylight and lightning protection device and a foundation ring wall;

the space metal truss is arranged on the foundation ring wall; the ventilating skylight and the lightning arrester are arranged at the top of the space metal truss;

the space metal truss also comprises a basic ring beam, an antenna housing embedded part, a support and a bottom film drawing structural part;

the foundation ring beam, the bottom film-drawing structural part and the support are sequentially arranged on the foundation ring beam and fixed through the antenna housing embedded part embedded in the foundation ring wall;

one end of the rod piece adjacent to the basic ring beam is connected with the support, and the other end of the rod piece is connected with the corresponding node center; two ends of the rod piece far away from the basic ring beam are respectively connected with different node hubs;

the radome membrane body is respectively connected with the ventilation skylight, the lightning arrester and the bottom film pulling structural member.

8. The radome of claim 7, wherein the monolithic membrane is connected to a mounting interface at the top of the radome and at the edge of the vent louver using a backing plate; the single-piece membrane body is arranged at the bottom of the spherical antenna housing and connected with the bottom film pulling structural part on the foundation ring wall through a base plate.

9. The radome of claim 7, wherein the top view of the louver and the lightning conductor is a regular polygon; the number of the single membrane bodies is the same as the number of the sides of the regular polygon.

10. The spherical radome of claim 7, wherein the radome membrane body is made of a high-strength polyester fiber membrane material or a wave-transmitting high-strength weather-resistant membrane material; the surface of the radome membrane body is coated with a fluoroplastic coating.