Rotary joint with sealing window

Abstract

The utility model belongs to the technical field of microwaves, and particularly discloses a rotary joint with a sealing window, which comprises a waveguide flange and a waveguide coaxial converter, the waveguide flange comprises a first sealing window flange and a second sealing window flange, and the waveguide coaxial converter comprises a first coaxial converter and a second coaxial converter; the first coaxial converter is arranged on the side edge of the first sealing window flange, the second coaxial converter is arranged on the side edge of the second sealing window flange, and a choke groove is formed between the first coaxial converter and the second coaxial converter. The two components of the antenna are not in contact, and radio frequency signals passing through the interior can be continuously, efficiently and stably transmitted; the first coaxial converter and the second coaxial converter realize mutual conversion between an electromagnetic wave mode transmitted in the waveguide and an electromagnetic wave mode transmitted in the coaxial line; the first sealing window flange and the second sealing window flange are used as waveguides to transmit signals; and air is isolated, so that a local sealing structure is formed.

Description

Technical Field

[0001] This utility model relates to the field of microwave technology, specifically a rotary joint with a sealing window. Background Technology

[0002] Rotary joints are commonly used components in microwave transmission systems. Their function is to allow continuous, efficient, and stable transmission of radio frequency signals through their internal components while the two parts rotate relative to each other. Rotary joints are often used for rotary connections between reflector antennas and transmitters, or between reflector antennas and receivers.

[0003] Transmission line: A signal carrier capable of transmitting microwave signals is called a transmission line. Suitable transmission lines for rotary joints include circular waveguides and coaxial cables.

[0004] Electrical Performance and Moisture Effects: Since the rotary joint is primarily composed of circular waveguides and coaxial cables, its signal transmission loss is very low under normal conditions when the internal air is dry. However, if the internal space of the rotary joint is connected to the air during use, moisture in the air will have a detrimental effect. Moisture will adhere to and condense on the metal inner wall of the rotary joint. This condensation reduces the conductivity of the metal surface, significantly increasing losses. Furthermore, humid air and even condensation can cause chemical reactions on the metal inner wall, leading to corrosion and consequently affecting performance and lifespan. The detrimental effects of moisture on waveguide devices are widespread.

[0005] Sealing: To isolate moisture from the outside, sealing is required. The area requiring sealing is the waveguide port. The conventional approach is to connect a waveguide sealing window to the waveguide port that needs sealing. Waveguide sealing windows have certain dimensions and weight. In applications where strict size or weight limitations are required, the combination of a rotary joint and a separate sealing window does not meet the requirements. Utility Model Content

[0006] The purpose of this invention is to provide a rotary joint with a sealing window to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a rotary joint with a sealing window, comprising a waveguide flange and a waveguide coaxial converter, wherein the waveguide flange comprises a first sealing window flange and a second sealing window flange, and the waveguide coaxial converter comprises a first coaxial converter and a second coaxial converter.

[0008] The first coaxial converter is located on the side of the first sealing window flange, and the second coaxial converter is located on the side of the second sealing window flange. A choke groove is provided between the first and second coaxial converters. The choke groove connects the first and second coaxial converters, and the two components are non-contact, allowing for continuous, efficient, and stable transmission of radio frequency signals from within. A complete rotary joint is formed by the waveguide flange, the waveguide coaxial converter, and the choke groove.

[0009] The first and second coaxial converters enable the conversion between the electromagnetic wave modes transmitted in the waveguide and the electromagnetic wave modes transmitted in the coaxial line.

[0010] The first and second sealing flanges serve as waveguides for signal transmission, isolating the air and forming a partially sealed structure.

[0011] In a preferred embodiment of this invention, a first pressure plate and a first medium plate are provided on the inner side of the first sealing window flange. The first medium plate is fitted into the first sealing window flange and fixed by the first pressure plate, and the first medium plate is pressed by the first pressure plate.

[0012] As a preferred embodiment of the present invention, a second pressure plate and a second medium plate are provided on the inner side of the second sealing window flange. The second medium plate is embedded in the second sealing window flange and fixed by the second pressure plate, and the second medium plate is pressed by the second pressure plate.

[0013] As a preferred embodiment of the present invention, the first coaxial converter is provided with a first converter and a first waveguide port. The first converter adopts a door button type conversion device, and the first waveguide port is connected to the first medium plate of the first sealing window flange.

[0014] As a preferred embodiment of the present invention, the second coaxial converter is provided with a second converter and a second waveguide port. The second converter adopts a probe-type conversion device, and the second waveguide port is connected to the second medium plate of the second sealing window flange.

[0015] The first and second coaxial converters are classified into gate-twist type and probe type. In the probe type, the inner conductor of the coaxial cable does not contact the waveguide, while in the gate-twist type, the inner conductor of the coaxial cable does contact the waveguide.

[0016] As a preferred embodiment of this invention, a rotating transmission line is provided inside the choke groove. The rotating transmission line includes a circular waveguide or a coaxial line to be suitable for use as a transmission line in a rotating joint.

[0017] As a preferred embodiment of this utility model, the first sealing window flange has a first mounting hole and the second sealing window flange has a second mounting hole, the first mounting hole and the second mounting hole are used for installation on other equipment.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention utilizes the first and second sealing flanges of a rotary joint to install a medium plate that provides a sealing effect. Once assembled, external humid air cannot enter the rotary joint. The rotary joint and sealing window are integrated into a single unit, saving installation space and reducing overall weight compared to a separate rotary joint and sealing window combination, making it suitable for applications where installation space and weight are strictly controlled. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the structure of the first sealing window flange and the second sealing window flange of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the first coaxial converter of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the second coaxial converter of this utility model.

[0025] In the figure: 1. First sealing window flange; 101. First pressure plate; 102. First medium plate; 103. First mounting hole; 2. Second sealing window flange; 201. Second pressure plate; 202. Second medium plate; 203. Second mounting hole; 3. First coaxial converter; 301. First conversion device; 302. First waveguide port; 4. Second coaxial converter; 401. Second conversion device; 402. Second waveguide port; 5. Choke groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Please see Figure 1-5 This utility model provides a technical solution: a rotary joint with a sealing window, including a waveguide flange and a waveguide coaxial converter, wherein the waveguide flange includes a first sealing window flange 1 and a second sealing window flange 2, and the waveguide coaxial converter includes a first coaxial converter 3 and a second coaxial converter 4.

[0030] The first coaxial converter 3 is disposed on the side of the first sealing window flange 1, and the second coaxial converter 4 is disposed on the side of the second sealing window flange 2. A choke groove 5 is provided between the first coaxial converter 3 and the second coaxial converter 4. The choke groove 5 is used to connect the first coaxial converter 3 and the second coaxial converter 4. The two components are non-contact, and the radio frequency signal passing through them can be transmitted continuously, efficiently, and stably. A complete rotary joint is formed by the waveguide flange, the waveguide coaxial converter, and the choke groove 5.

[0031] The first coaxial converter 3 and the second coaxial converter 4 are used to convert between the electromagnetic wave modes transmitted in the waveguide and the electromagnetic wave modes transmitted in the coaxial line.

[0032] The first sealing flange 1 and the second sealing flange 2 serve as waveguides for signal transmission; they isolate the air and form a localized sealing structure.

[0033] Furthermore, a first pressure plate 101 and a first medium plate 102 are provided on the inner side of the first sealing window flange 1. The first medium plate 102 is fitted into the first sealing window flange 1 and fixed by the first pressure plate 101, and the first medium plate 102 is pressed by the first pressure plate 101.

[0034] Furthermore, a second pressure plate 201 and a second medium plate 202 are provided on the inner side of the second sealing window flange 2. The second medium plate 202 is fitted into the second sealing window flange 2 and fixed by the second pressure plate 201, and the second medium plate 202 is pressed by the second pressure plate 201.

[0035] Furthermore, the first coaxial converter 3 is provided with a first converter and a first waveguide port 302. The first converter adopts a door button type conversion device, and the first waveguide port 302 is connected to the first medium plate 102 of the first sealing window flange 1.

[0036] Furthermore, the second coaxial converter 4 is provided with a second converter and a second waveguide port 402. The second converter adopts a probe-type conversion device, and the second waveguide port 402 is connected to the second medium plate 202 of the second sealing window flange 2.

[0037] The first coaxial converter 3 and the second coaxial converter 4 are classified into gate-twist type and probe type. In the probe type, the inner conductor of the coaxial line does not contact the waveguide, while in the gate-twist type, the inner conductor of the coaxial line does contact the waveguide.

[0038] Furthermore, a rotating transmission line is provided inside the choke slot 5. The rotating transmission line includes a circular waveguide or a coaxial line to be suitable for use as a transmission line for a rotating joint.

[0039] Furthermore, the first sealing window flange 1 is provided with a first mounting hole 103 and the second sealing window flange 2 is provided with a second mounting hole 203. The first mounting hole 103 and the second mounting hole 203 are used for installation on other equipment.

[0040] In summary, the first sealing window flange 1 and the second sealing window flange 2 of this invention serve as waveguides for signal transmission, isolating air and forming a partially sealed structure. The first coaxial converter 3 and the second coaxial converter 4 are used for waveguide-coaxial conversion to achieve mutual conversion between the electromagnetic wave modes transmitted in the waveguide and the electromagnetic wave modes transmitted in the coaxial line. Depending on whether the inner conductor of the coaxial line is in contact with the waveguide, waveguide-coaxial conversion is divided into probe type and gate-twist type. The first conversion device 301 is gate-twist type, and the second conversion device 401 is probe type. In the probe type, the inner conductor of the coaxial line does not contact the waveguide; in the gate-twist type, the inner conductor of the coaxial line does contact the waveguide. In the rotary joint with sealing windows, one probe type waveguide-coaxial converter and one gate-twist type waveguide-coaxial converter are used. The two components of the choke groove 5 are non-contact, allowing continuous, efficient, and stable transmission of radio frequency signals passing through it. For rotary transmission lines, suitable transmission lines for rotary joints include circular waveguides and coaxial lines.

[0041] In traditional waveguide devices, the rotary joint and the sealing window are separate components. The sealing window also requires a structure similar to a waveguide flange for support and fixation.

[0042] Compared to traditional solutions, this rotary joint with a sealing window utilizes the waveguide flange of the rotary joint as a support structure for the sealing window medium plate, eliminating the need for a separate support structure. This saves installation space and reduces overall weight.

[0043] This rotary joint with a sealing window is suitable for applications requiring sealing and can be widely used.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary joint with a sealing window, characterized in that: The system includes a waveguide flange and a waveguide coaxial converter. The waveguide flange includes a first sealing window flange (1) and a second sealing window flange (2). The waveguide coaxial converter includes a first coaxial converter (3) and a second coaxial converter (4). The first coaxial converter (3) is located on the side of the first sealing window flange (1), the second coaxial converter (4) is located on the side of the second sealing window flange (2), and a choke groove (5) is provided between the first coaxial converter (3) and the second coaxial converter (4).

2. A rotary joint with a sealing window according to claim 1, characterized in that: The first sealing window flange (1) is provided with a first pressure plate (101) and a first medium plate (102) on the inner side. The first medium plate (102) is fitted into the first sealing window flange (1) and fixed by the first pressure plate (101).

3. A rotary joint with a sealing window according to claim 1, characterized in that: The second sealing window flange (2) is provided with a second pressure plate (201) and a second medium plate (202) on the inner side. The second medium plate (202) is fitted into the second sealing window flange (2) and fixed by the second pressure plate (201).

4. A rotary joint with a sealing window according to claim 1, characterized in that: The first coaxial converter (3) is provided with a first converter and a first waveguide port (302). The first converter adopts a door button type conversion device, and the first waveguide port (302) is connected to the first medium plate (102) of the first sealing window flange (1).

5. A rotary joint with a sealing window according to claim 1, characterized in that: The second coaxial converter (4) is provided with a second converter and a second waveguide port (402). The second converter adopts a probe-type conversion device, and the second waveguide port (402) is connected to the second medium plate (202) of the second sealing window flange (2).

6. A rotary joint with a sealing window according to claim 1, characterized in that: A rotating transmission line is provided inside the choke slot (5), and the rotating transmission line includes a circular waveguide or a coaxial line.

7. A rotary joint with a sealing window according to claim 1, characterized in that: The first sealing window flange (1) has a first mounting hole (103) and the second sealing window flange (2) has a second mounting hole (203).

Images