CN216793998U - Discrete support type antenna panel - Google Patents

Abstract

The utility model provides a discrete support type antenna panel, and belongs to the technical field of reflector antennas. The skin-protecting and skin-protecting device comprises a front skin and a rear skin, wherein a flanging is arranged on the edge of the front skin; the rear skin and the front skin are connected through a plurality of supporting pieces; the types of the supporting pieces comprise middle supporting pieces and corner end supporting pieces which are uniformly distributed on the upper surface of the rear skin; the rear skin comprises a hollow part and a supporting part, and the corner end supports are all positioned at the folding corners of the upper surface of the rear skin; the bottom and the top of the middle support are both provided with extension arms for enlarging the support surface, and the extension directions of the extension arms are opposite; the corner end support comprises a corner plate with two sides perpendicular to each other to form a right-angle shape, and a first supporting surface and a second supporting surface which are positioned at the top of the corner plate, wherein the first supporting surface and the second supporting surface are positioned on different sides of the corner plate; the utility model has the characteristics of reasonable structure, stable mechanics, high reliability, easy flow operation and batch production.

Description

Discrete support type antenna panel

Technical Field

The utility model relates to the technical field of parabolic reflector antennas, in particular to a discrete support type antenna panel.

Background

With the rapid development of communication measurement and control and deep space exploration technologies, parabolic reflector antennas, especially large-aperture reflector antennas, have more and more construction requirements. The reflecting surface of the parabolic antenna is formed by splicing a plurality of reflecting panels, and the precision of the reflecting panels directly influences the performance of the antenna. In order to improve the performance of the antenna, scientists have been exploring a method for making a reflecting surface with higher precision. However, as the aperture of the antenna is increased, the restriction effect of the weight factor of the reflecting panel is more and more prominent. If the weight of a single reflective panel cannot be reliably controlled, many thousands of reflectors combined with reflective panels will have a huge weight, which not only increases the difficulty of manufacturing the support and servo system, but also causes larger overall deformation of the reflector, which is more detrimental to overall accuracy and antenna performance.

The existing high-precision reflecting panel mainly comprises three types, namely an aluminum alloy traditional riveting structure, a carbon fiber skin sandwich structure, an aluminum alloy skin rib slotting and bonding structure and the like. The aluminum alloy material covering rubber band slotting and bonding structure has the advantages of being reliable in stress-free forming precision, strong in operability, convenient to produce and the like, and is widely applied to the reflector antenna with the medium and large caliber. The structure is mainly characterized in that the Z-shaped ribs of the traditional back frame structure are uniformly grooved in the vertical length direction, naturally attached to the curved surface skin after the rigidity of the Z-shaped ribs is reduced, and integrally formed by a stress-free gluing mode. Chinese patent No. CN201010214168.4 "a high-precision antenna reflector panel and its manufacturing method" discloses the structural form and manufacturing method of the panel in detail.

Although this form of reflective panel is widely used, its weight characteristics are not advantageous. The weight is difficult to reduce by the thick back rib structure and the full aluminum alloy material. According to research, among the three structural forms of the reflecting panels, the carbon fiber honeycomb sandwich structure has greater advantages in weight (equivalent unit area weight), but the panels belong to closed structures, have low reliability and poor weather resistance, and are not suitable for mass production and application to large-caliber antennas at present. Besides honeycomb sandwich and other limited structural forms, there are currently few structural innovations regarding the reflective surface of carbon fiber materials.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a discrete supported antenna panel. The antenna panel has the characteristics of reasonable structure, stable mechanics, high reliability, easy flow operation and batch production.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a discrete support type antenna panel comprises a front skin and a rear skin, wherein the edge of the front skin is provided with a flanging; the rear skin is connected with the front skin through a supporting piece; the supporting piece comprises middle supports and corner end supports which are uniformly distributed on the upper surface of the rear skin; the rear skin comprises a hollow part and a supporting part, and the corner end supports are all positioned at the folding corners of the upper surface of the rear skin; the bottom and the top of the middle support are both provided with extension arms for enlarging the support surface, and the extension directions of the extension arms are opposite; the corner end support comprises a corner plate, a first supporting surface and a second supporting surface, wherein two sides of the corner plate are perpendicular to each other to form an angle, and the first supporting surface and the second supporting surface are positioned at the top of the corner plate and are positioned on different sides of the corner plate; and a reinforcing rib is arranged on the lower surface of the front skin, and the section of the reinforcing rib is L-shaped.

Furthermore, the thicknesses of the front skin and the rear skin are both 0.3 mm-1.5 mm; the thickness of the middle support and the corner end support is 0.5 mm-2 mm; the thickness of the reinforcing rib is 0.3 mm-0.5 mm; the flanging height of the front skin is 5-15 mm; the height of the reinforcing rib is 5 mm-10 mm.

Furthermore, the anti-drop device also comprises an anti-drop mechanism used for fixing the supporting piece and the front skin, wherein the anti-drop mechanism is a hollow rivet.

The utility model adopts the technical scheme to produce the beneficial effects that:

1. the utility model utilizes the advantage of convenient molding of the carbon fiber material, designs an innovative form of discrete support, and has reasonable structure, stable mechanics and high reliability.

2. The utility model fully utilizes the advantages of high specific strength and high specific rigidity of the carbon fiber material relative to the aluminum alloy material, and greatly reduces the weight of the panel on the premise of ensuring the accuracy of the panel.

3. The utility model is formed by utilizing the die and the tool, has mature technology, is easy for line production and is manufactured in batches.

Drawings

Fig. 1 is a schematic back structure of an embodiment of the present invention.

Fig. 2 is a schematic front view of the structure of fig. 1.

FIG. 3 is a schematic structural view of the present invention with the rear skin removed.

Fig. 4 is a schematic view of an intermediate structure form and a tool forming in an embodiment of the present invention.

FIG. 5 is a schematic view of a corner support structure and tooling in an embodiment of the utility model.

FIG. 6 is a schematic view of two corner support structures and tooling.

FIG. 7 is a schematic view of the rib structure and tooling formation.

Fig. 8 is a sectional view of the attachment position of the anti-sticking mechanism.

In the figure: the anti-falling structure comprises a front skin 1, a rear skin 2, a middle support 3, a first corner end support 4, a second corner end support 5, a reinforcing rib 6 and an anti-falling bonding structure 7.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described 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 creative efforts.

A carbon fiber panel of a discrete support double-skin structure mainly comprises a front skin, a rear skin, an angle end support, an internal support, a reinforcing rib and an anti-falling bonding structure. The front skin, the rear skin, the corner end supports, the internal supports, the reinforcing ribs and other members are all made of carbon fiber materials. The carbon fiber material member can be prefabricated in advance and then bonded respectively, and can also be formed in one step by using a prepreg through a die tool.

Wherein, preceding covering and back covering adopt carbon fiber prepreg to shape the curved surface on the mould, still lie in carbon fiber covering and have integrality with the difference of covering in traditional aluminum alloy muscle fluting panel, do not have the edge to the gap structure of inside setting.

Furthermore, the thickness of the front skin and the thickness of the rear skin are 0.3-1.5 mm, the front skin is provided with a peripheral flanging structure, and the flanging height is 5-15 mm.

Furthermore, the rear skin is not integral and has a hollow structure.

The internal support is of a Z-shaped rib structure and is obtained by folding a rectangular prepreg into a Z-shaped section through a die and then curing the folded rectangular prepreg. The length dimension of the inner support is relatively short, typically set to 0.8-2 times the height dimension.

Wherein the corner end supports have a structural form facing in two directions. The corner end support can be a crossed combination of two unidirectional internal support structures, and can also be an integral form with two directional characteristics.

Further, the thickness of the inner support and the corner end support is 0.5-2 mm.

Unlike other structural forms of carbon fiber material reflective panels, the internal supports, corner end supports, and like intermediate supports in the panel are discretely distributed rather than continuous.

Wherein, the stiffening ribs are attached to the back of the front skin and are distributed at intervals in the middle areas of the supporting structure and the edge. The function of the stiffening ribs is to increase the local stiffness of the front skin. The reinforcing ribs may be continuous or may be intermittently distributed.

Furthermore, the reinforcing rib has an L-shaped cross section, the thickness of the reinforcing rib is 0.3-0.5mm, and the height of the reinforcing rib is 5-10 mm. The reinforcing rib and the skin are integrally formed, and two ends of the reinforcing rib and the edge turning structure of the inner support or the corner end support and the front skin are connected into a whole.

Wherein, the connecting position of the supporting structure and the front and the rear skins is provided with anti-debonding connection. The anti-debonding connection is made of metal, penetrates through the back rib and the skin, and has larger attaching surfaces at two ends and the panel. The anti-adhesive connection connects the skin under the condition that the bonding failure skin is taken off, so that the bonding failure skin is not easy to fall off. The anti-debonding connection can be realized by selecting large-plane hollow rivets or matching bolts and nuts with large flat pad structures, and can also be realized by using other metal connection structures.

A carbon fiber panel of a discrete support double-skin structure is formed by the following main steps:

step 1, pre-forming front and rear skins. And (3) laying a predetermined number of carbon fiber prepregs on the prefabricated curved surface mould, and curing and forming to form the rigid skin. Wherein, the front skin uses a flanging die to flange the periphery of the front skin, and the cutting shape is in place. The front skin may be directly formed integrally with the subsequent step without being preformed.

And 2, forming corner end support and internal support. The corner end supports and the inner supports are bonded at predetermined positions. The internal support is bent into a Z shape by using a rectangular carbon fiber prepreg through a tool die. The angle end support can be in a cross form of internal supports in two directions, and can also be directly formed through an arc-shaped tool with two directional characteristics.

And 3, forming the reinforcing rib. And bonding a reinforcing rib behind the front skin by using a long-strip-shaped carbon fiber prepreg and a flanging tool. The reinforcing ribs are intermittently distributed in the middle area of the support structure and the edge. Redundant lengths are reserved at two ends of the reinforcing rib and are respectively connected in a gap between the supporting structure and the front skin or on a flanging structure of the front skin.

And 4, bonding the rear skin. And placing the preformed rear skin above the supporting structure according to a set position, and bonding the preformed rear skin with the bonding surface of the supporting structure.

And 5, integrally curing. And integrally curing the bonded reflecting surface structure, and forming a rigid whole by the front and rear skin, the reinforcing ribs, the internal supports, the corner end supports and other carbon fiber structures after curing.

And 6, mounting the anti-falling bonding structure. And drilling holes in the center positions of the joint bonding surfaces of the corner end support, the inner support and the front and rear skins, and installing an anti-falling bonding structure.

And 7, modifying and surfacing. Removing the flashes, polishing the edges and finishing the appearance of the reflecting surface; then, the surface treatment of the whole structure is carried out, and the sealing material is dipped or sprayed, so that the weather resistance and the appearance performance of the reflecting surface are improved.

The following is a more specific example:

referring to fig. 1 to 8, the present embodiment mainly includes a front skin 1, a rear skin 2, a middle support 3, a first corner end support 4, a second corner end support 5, a reinforcing rib 6, an anti-separation bonding structure 7, and the like. The front skin 1, the rear skin 2, the middle support 3, the first corner end support 4, the second corner end support 5 and the reinforcing rib 6 are all made of carbon fiber and can be formed by carbon fiber prepreg. The anti-falling bonding mechanism 7 is made of an anti-rust aluminum alloy material.

The front skin 1 is formed by directly spreading carbon fiber prepreg on a curved surface of a mould, the size is about 2.5m multiplied by 1.5m, the front skin is in a sector shape and has a certain curvature, and the thickness is about 0.65 mm; and after the front skin is laid, flanging is carried out by using a flanging tool, and the height of the flanging is uniform to be 10 mm.

The rear skin 2 is prefabricated and molded in advance by adopting carbon fiber prepreg, the method is the same as that of the front skin, and the thickness is selected to be 0.5 mm. The rear skin is designed into a hollow structure according to the size of the front skin and the distribution of the supporting structures, so that the mechanical requirements are met, and the material consumption is reduced.

The middle support 3, the first corner end support 4, the second corner end support 5 and the like are all formed by 0.8mm of carbon fiber prepreg directly on the back face of the front skin 1 through a mold. The various support heights are equal, and the design height is 125mm in the embodiment. The length of the various supports is selected to be about 1.2 times the height dimension.

The first corner end support 4 is in a cross form of two-direction internal supports, and the second corner end support 5 is in a circular arc shape with two-direction characteristics.

The height of the reinforcing rib 6 is 10mm, the thickness is 0.3mm, and the reinforcing rib is formed by bonding a long-strip-shaped carbon fiber prepreg and a flanging tool behind the front skin. The stiffening ribs are distributed continuously and uniformly in the intermediate region between the support structure and the edge of the front skin. Redundant length is reserved at two ends of the reinforcing rib and connected with the flanging structure of the front skin.

The anti-falling bonding mechanism 7 is arranged in the middle of the overlapping bonding surface of each intermediate support structure and the front and rear skins, and the hollow rivet structure with the small diameter and the large brim is prefabricated by antirust aluminum alloy materials. After the carbon fiber reflecting panel is integrally cured and molded, the front skin, the rear skin and the middle support are firmly riveted through punching and penetrating from a set position and self deformation.

The adhesive structure is slightly inferior in weather resistance to mechanical joining. Adhesive structures exposed outdoors over the years often have risks of adhesive layer cracking and structure debonding. And the anti-falling bonding structure can ensure that the skin does not fall off even if the skin is separated from the back frame and is debonded, thereby improving the safety.

In this embodiment, the carbon fiber panel of the discrete support double-skin structure is mainly formed by the following steps:

step 1, performing a back skin. And laying carbon fiber prepreg with a given thickness and a designed hollow shape on the prefabricated curved surface mould, and curing and forming the carbon fiber prepreg into a rigid skin.

And 2, laying a front skin. Carbon fiber prepreg with set thickness and enough size is laid on the curved surface die, and the periphery of the die is flanged by using a flanging tool, so that the flanging height is uniform. Excess material is removed and the profile is initially trimmed.

And 3, forming corner end support and internal support. And bonding various supporting structures such as a first corner end support, a second corner end support, an internal support and the like at the design position by utilizing a tool. The inner support is bent into a Z shape by using a rectangular carbon fiber prepreg through a tooling die. The first angle end support has an internal support cross form in two directions, and the second angle end support has an arc shape with two directional characteristics and is directly formed by utilizing a tool.

And 4, forming the reinforcing rib. And bonding a reinforcing rib behind the front skin by using a long-strip-shaped carbon fiber prepreg and a flanging tool. The reinforcing ribs are distributed in the middle area of the supporting structure and the edge of the front skin in a transversely-longitudinally spaced and continuous mode. Two ends of the reinforcing rib are connected to the front skin flanging structure.

And 5, bonding the rear skin. And placing the preformed rear skin above each supporting structure such as the corner end support and the internal support according to a set position, and bonding the preformed rear skin on the bonding surface.

And 6, integrally curing. And integrally curing the bonded reflecting surface structure, and forming a rigid whole by the front and rear skin, the reinforcing ribs, the internal supports, the corner end supports and other carbon fiber structures after curing.

And 7, mounting the anti-falling bonding structure. And drilling holes in the center positions of the joint bonding surfaces of the corner end support, the inner support and the front and rear skins, and installing an anti-falling bonding structure.

And 8, modifying the model and performing surface treatment. Removing the colloidal nodules, polishing the edges, and performing secondary reflector surface appearance finishing; then, the surface treatment of the whole structure is carried out, and the sealing material is dipped or sprayed, so that the weather resistance and the appearance performance of the reflecting surface are improved.

In general, the technical scheme provided by the utility model fully utilizes the advantages of high specific strength, high specific rigidity and convenience in forming of the carbon fiber material relative to the aluminum alloy material, and designs a novel structure form of discrete support, which has the advantages of reasonable structure, stable mechanics and high reliability. In addition, the light weight of the reflecting panel is effectively realized on the premise of ensuring the accuracy of the curved surface, and the reflecting panel is suitable for production and manufacturing of reflecting panels with different boundary shapes. According to calculation, compared with the reflecting panel made of the aluminum alloy material with the same size, the panel made of the structural carbon fiber material can reduce the weight by about 30 percent. The weight reduction has great significance for the reflector antenna with large caliber, the whole weight of the reflector is directly and greatly reduced, the design and manufacturing difficulty of the support and movement system of the antenna seat frame is reduced, and the operation stability and the operation cost of the antenna are also reduced.

It should be understood that the above description of the embodiments of the present patent is only an exemplary description for facilitating the understanding of the patent scheme by the person skilled in the art, and does not imply that the scope of protection of the patent is only limited to these examples, and that the person skilled in the art can obtain more embodiments by combining technical features, replacing some technical features, adding more technical features, and the like to the various embodiments listed in the patent without any inventive effort on the premise of fully understanding the patent scheme, and therefore, the new embodiments are also within the scope of protection of the patent.

Furthermore, for the purpose of simplifying this description, this patent may not list some common embodiments, which will occur to those skilled in the art after understanding the present patent, and obviously, these embodiments should be included in the scope of the patent protection.

Claims (5)

1. A discrete support type antenna panel is characterized by comprising a front skin and a rear skin, wherein the edge of the front skin is provided with a flanging; the rear skin and the front skin are connected through a plurality of supporting pieces; the types of the supporting pieces comprise middle supporting pieces and corner end supporting pieces which are uniformly distributed on the upper surface of the rear skin; the rear skin comprises a hollow part and a supporting part, and the corner end supports are all positioned at the corners of the upper surface of the rear skin; the bottom and the top of the middle support are both provided with extension arms for enlarging the support surface, and the extension directions of the extension arms are opposite; the corner end support comprises an angle plate with two sides perpendicular to each other to form a right-angle shape, and a first supporting surface and a second supporting surface which are positioned at the top of the angle plate, wherein the first supporting surface and the second supporting surface are positioned on different sides of the angle plate; and a reinforcing rib is arranged on the lower surface of the front skin, and the section of the reinforcing rib is L-shaped.

2. The discretely supported antenna panel of claim 1, wherein the front skin and the rear skin each have a thickness of 0.3mm to 1.5 mm; the thickness of the middle support and the corner end support is 0.5 mm-2 mm; the thickness of the reinforcing rib is 0.3 mm-0.5 mm; the flanging height of the front skin is 5-15 mm; the height of the reinforcing rib is 5 mm-10 mm.

3. The discretely supported antenna panel as recited in claim 1, further comprising anti-separation bonding means for securing the support member and the front skin, wherein the anti-separation bonding means is a hollow rivet.

4. The discretely supported antenna panel as recited in claim 1, wherein adjacent ones of the supports are spaced apart.

5. The discretely supported antenna panel of claim 1, wherein the corner end-supported corner panels are replaceable with arcuate panels.

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