RU206062U1 - REFLECTOR - Google Patents

Abstract

The utility model relates to the fields of mechanical engineering and radio engineering, can be used in space technology, namely in the construction of solid-state antenna reflectors made of fibrous composite materials with a radio-reflecting surface. The reflector works as part of the antenna and is designed to reflect high-frequency energy from the feed and form a narrow beam with the required The objectives of the claimed utility model are: improving the design of the reflector, increasing the accuracy of the reflecting surface when the signal is reflected from the surface of the reflector, reducing the mass, reducing the manufacturing time of the reflector and increasing manufacturability. The tasks are solved due to the fact that the reflector contains a reflector and a supporting structure, connected at a distance from each other. Moreover, the reflector and the support structure are connected by an adjusting unit, which has the ability to change the position of the reflective surface of the reflector relative to the support structure, which consists of an outer profiled and an inner shell. signal from the reflector surface; - achieving a balance of optimal values of the main technical parameters of the reflector, such as dimensional stability, bearing capacity, low weight in accordance with the requirements for technical and operational characteristics.

Description

The useful model relates to the fields of mechanical engineering and radio engineering, can be used in space technology, namely, in the construction of solid-state antenna reflectors made of fibrous composite materials with a radio-reflecting surface.

The reflector works as part of the antenna and is designed to reflect high-frequency energy from the feed and form a narrow beam with the required directional pattern. The pointing accuracy of an antenna with a reflector depends on the dimensional stability of the reflector and the accuracy of its manufacture. During operation, the reflector is exposed to multiple negative factors: radiation, vacuum and extreme positive and negative temperatures.

The main requirements for spacecraft antenna reflectors, in addition to radio-technical ones, are:

- manufacturing accuracy of the reflecting surface with deviations from the nominal surface not exceeding tenths of a millimeter;

- stability of geometry during operation in extreme conditions of outer space;

- high specific characteristics of strength and rigidity;

- high degree of reliability;

- high degree of manufacturability;

- low weight.

Known device - antenna reflector (patent RU 2070355, published 10.12.1996), made of skins, between which a filler is placed. One of the skins has a reflective surface made of overlapping reflective elements in the form of curved or regular polygons.

The disadvantages of this device (reflector) are: the use of dissimilar materials, reduced accuracy of the radio-reflecting surface, high labor intensity in laying out polygons, the complexity of reproducing and predicting production results.

Some of the shortcomings of the device described above have been eliminated in the reflector (patent RU 2655473, published on May 28, 2018), which was adopted as a prototype. The reflector consists of a reflector and a support structure located at a distance from each other, for their connection, plates are introduced, glued with a part of their surface to the inner and outer sides of the support structure parallel to the reflector axis, while on the free parts of the plates from the inner and outer sides through an adhesive joint corners are installed, to the free parts of which a reflector is glued. The support structure is a mono-shell made of carbon fiber composite fabric with a mounting plane perpendicular to the reflector axis; reflector made of carbon fiber prepreg in the form of end-to-end strips. It is proposed to install two corners on each side of the plate.

The disadvantages of this device are: a complex technology for manufacturing a support structure in the form of a mono-shell using a technological device that will need to be destroyed in order to dismantle the mono-shell, non-separable and unregulated connection of the reflector and the support structure, the use of an unevenly applied layer of glue in the place where the corner is installed on the back surface of the reflector, large mass of the structure, great labor intensity in the manufacture.

The objectives of the claimed utility model are: improving the design of the reflector, increasing the accuracy of the reflecting surface when reflecting the signal from the surface of the reflector, reducing the mass, reducing the manufacturing time of the reflector and increasing manufacturability.

The tasks are solved due to the fact that the reflector contains a reflector and a support structure, connected at a distance from each other. Moreover, the reflector and the support structure are connected by an adjusting unit that can change the position of the reflective surface of the reflector relative to the support structure, which consists of an outer profiled and an inner shell. In this case, the reflector and the support structure are made according to a quasi-isotropic reinforcement scheme with unidirectional strips laid end-to-end. In addition, the support structure is made with cutouts, and the reflector and support structure are made with additional reinforcement layers. The connection of the shells in the support structure can be glued or riveted. Reflector and support structure are made of polymer composite material.

The technical results provided by the given set of features are:

- implementation of the possibility of adjusting the reflective surface of the reflector;

- increased accuracy of signal reflection from the reflector surface;

- achieving a balance of optimal values of the main technical parameters of the reflector, such as dimensional stability, bearing capacity, low weight in accordance with the requirements for technical and operational characteristics.

The claimed utility model is illustrated by drawings:

in fig. 1 - assembled reflector (side view);

in fig. 2 - assembled reflector (rear view);

in fig. 3 - assembled reflector (section);

in fig. 4 - adjusting unit (section);

in fig. 5 - appearance of the reflector from the side of the reflector;

in fig. 6 is an external view of the reflector from the side of the supporting structure.

The reflector (Fig. 5, 6) contains a reflector 1 (Fig. 1-4) and a support structure 2 (Fig. 1-4), connected at a distance from each other using an adjusting unit 3 (Fig. 1-3, 6) ... Moreover, the reflector 1 (Fig. 1-4) and the support structure 2 (Fig. 1-4) are connected by the adjusting unit 3 (Fig. 1-3), having the ability to change the position of the reflecting surface of the reflector 1 (Fig. 1-4) relative to the reference structure 2 (Fig. 1-4), consisting of an outer profiled shell 11 (Fig. 3) and an inner shell 12 (Fig. 3). In this case, the reflector 1 (Figs. 1-4) and the supporting structure 2 (Figs. 1-4) are made according to a quasi-isotropic reinforcement scheme with unidirectional tapes laid end-to-end. In addition, the support structure 2 (Fig. 1-4) is made with cutouts, and the reflector 1 (Fig. 1-4) and the support structure 2 (Fig. 1-4) are made with additional reinforcement layers. The connection of the shells 11, 12 (Fig. 3) in the support structure 2 (Figs. 1-4) can be threaded, glued or riveted. Reflector 1 (Fig. 1-4) and support structure 2 (Fig. 1-4) are made of polymer composite material.

Reflector 1 (Fig. 1-5) is structurally a skin made of polymer composite material according to a quasi-isotropic reinforcement scheme.

The support structure 2 (Fig. 1-4) is structurally an assembly that includes shells made of a fibrous composite material, made according to a quasi-isotropic reinforcement scheme: an outer profiled shell 11 (Fig. 3, 4) and an inner shell 12 (Fig. 3, 4 ) are interconnected by gluing, together they form a closed loop that provides the design stiffness of the support structure 2 (Figs. 1-4). The cutouts in the support structure 2 (Figs. 1-2) are made to reduce the weight of the structure. The cutouts in the support structure do not reduce the required rigidity and dimensional accuracy.

The adjusting unit 3 (Fig. 1-3) is shown in detail in section (Fig. 4). The adjusting unit 3 (Fig. 1-3) includes built-in embedded elements 7 (Fig. 4), washers 8 (Fig. 4), a layer of glue 5 (Fig. 4), bracket 6 (Fig. 4), threaded sleeve 10 (Fig. 4), bolt 9 (Fig. 4).

Rotating the threaded bush 10 (Fig. 4) relative to the bracket 6 (Fig. 4) changes the position of the reflector 1 (Fig. 4).

The reflector 1 (Fig. 1-3) is made on a precision mandrel, and the power support 2 (Fig. 1-3) is made on a separate mandrel of normal accuracy with subsequent assembly.

The technical and economic advantages of this reflector are:

- reduction of production time due to exclusion from the construction of the filler and operations for its manufacture and gluing, and ground experimental development;

- Realization of the possibility of adjusting the reflecting surface using the adjusting unit to achieve high accuracy of the reflecting surface;

- Achievement of a high degree of manufacturability of the reflector production through the use of several devices with subsequent assembly and adjustment.

Claims (5)

1. A reflector containing a reflector and a support structure, connected at a distance from each other, characterized in that the reflector and the support structure are connected by an adjusting unit capable of changing the position of the reflective surface of the reflector relative to the support structure consisting of an outer profiled and an inner shell, while the reflector and the support structure are made according to a quasi-isotropic reinforcement scheme with unidirectional strips laid end-to-end. 2. The reflector of claim. 1, characterized in that the support structure is made with cutouts. 3. The reflector of claim. 1, characterized in that the reflector and the support structure are made with additional reinforcement layers. 4. The reflector of claim. 1, characterized in that the connection of the shells in the support structure can be threaded, glued or riveted. 5. The reflector of claim. 1, characterized in that the reflector and the support structure are made of a polymer composite material.

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