Double-shaft double-channel large-angle rotary joint

Abstract

The invention discloses a double-shaft double-channel large-angle rotary joint which comprises a fixed base, a rotary cavity and a rotary support, the rotary support is provided with a mounting hole, the rotary support is rotatably connected to the rotary cavity, the rotary cavity is rotatably connected to the fixed base, a first channel and a second channel are arranged in the rotary cavity, and the first channel and the second channel are communicated with the mounting hole. The first channel and the second channel are both connected with a rotating section assembly, one end of the first channel is connected with a first input waveguide, the other end of the first channel is connected with a first output waveguide, one end of the second channel is provided with a second input waveguide, and the other end of the second channel is provided with a second output waveguide. By arranging the rotating cavity and the rotating support, the rotating joint can rotate horizontally and swing in a pitching mode, the rotating range is larger, electric transmission channels of the two channels are mutually independent, and the isolation degree of the channels is greatly improved.

Description

Technical Field

[0001] The invention belongs to the field of microwave technology, and in particular relates to a dual-axis dual-channel large-angle rotation joint. Background Art

[0002] With the rapid development of China's manufacturing industry, various types of satellite communication systems with rotating antennas in motion generally use rectangular waveguides and waveguide rotating joints to transmit high-frequency signals from fixed transmitters to rotating antennas. High-frequency signal communication products have high performance requirements. The existing coaxial rotating joint structures are mostly single-channel, or single-channel plus one or more waveguides, which have the following shortcomings:

[0003] 1. Generally, a single-axis dual-channel or single-axis multi-channel structure is adopted.

[0004] 2. Due to its structural influence, the small azimuth rotation and elevation rotation angles of the dual-axis dual-channel are an important factor restricting its application. Generally, the phased array antenna requires the elevation angle to be between ±50° and ±60°. In order to achieve the purpose of the elevation angle, the azimuth rotation angle is often sacrificed.

[0005] 3. Use two independent single-axis rotation joints, each independently completes the rotation movement in its own direction, and the combination is used to achieve the purpose of dual-axis dual-channel (the two axes cannot be coplanar). Summary of the invention

[0006] In order to solve the above-mentioned current situation that the coplanar dual-axis dual-channel rotation angle is small, the present invention proposes a waveguide rotation joint suitable for large-angle rotation.

[0007] In order to solve the above problems existing in the prior art, the technical solution adopted by the present invention is:

[0008] A dual-axis dual-channel large-angle rotation joint comprises a fixed base, a rotation cavity and a rotation bracket.

[0009] The rotating bracket is provided with a mounting hole, and the rotating bracket is rotatably connected to the rotating cavity.

[0010] The rotating cavity is rotatably connected to a fixed base, a first channel and a second channel are provided inside the rotating cavity, the first channel and the second channel are both connected to a rotating section assembly, one end of the first channel is connected to a first input waveguide, the other end of the first channel is connected to a first output waveguide, one end of the second channel is provided with a second input waveguide, and the other end of the second channel is provided with a second output waveguide.

[0011] By setting up a rotating cavity and a rotating bracket, the rotating joint can perform horizontal rotation and pitch swing, with a larger rotation range. At the same time, the dual-channel setting makes the electrical circuits independent of each other, and the channel isolation is greatly improved.

[0012] Furthermore, the rotating segment assembly includes a first rotating segment assembly, a second rotating segment assembly, a third rotating segment assembly, and a fourth rotating segment assembly. The first rotating segment assembly and the third rotating segment assembly are connected to the first channel, the second rotating segment assembly and the fourth rotating segment assembly are connected to the second channel, the first rotating segment assembly is arranged below the second rotating segment assembly, the first rotating segment assembly and the second rotating segment assembly are coaxially arranged, the third rotating segment assembly and the fourth rotating segment assembly are both horizontally arranged, and the third rotating segment assembly and the fourth rotating segment assembly are coaxially arranged. By replacing the waveguide with the rotating segment assembly, under the premise of normal rotation, not only the bandwidth requirements can be met, but also the output electrical indicators can be met. Since the rotating joint requires both horizontal rotation and pitch rotation, two rotating components are set for rotation in two directions respectively. Since there are two channels, each channel requires rotation in two directions, so each channel requires two rotating segment assemblies to ensure that the bandwidth meets the requirements.

[0013] Furthermore, the fixed base is rotatably connected to the rotating cavity through a first bearing, the axis of the first bearing is vertically arranged, the first bearing is horizontally arranged, and the rotating cavity can realize horizontal rotation through the first bearing, the rotating cavity is rotatably connected to the rotating bracket through a second bearing, the axis of the second bearing is horizontally arranged, and the second bearing is vertically arranged, there are two second bearings, the two second bearings are respectively arranged at both ends of the rotating cavity, and are symmetrically arranged with the axis of the rotating cavity as the center, the rotating bracket can adjust the pitch angle in the vertical direction through the second rotating bearing, the first rotating section assembly is connected to the first shell through the third bearing, and the first shell is connected to the fixed base, in order to ensure the transmission of microwaves, the vertical rotation center of the first channel and the second channel needs to be set at the center of the rotating cavity, so the rotation center of the first channel and the second channel needs to be coaxially arranged, in order to provide good support for the rotating section assembly internally, it is necessary to set the first shell and the second shell, when the rotating cavity rotates horizontally, the first shell and the second shell do not rotate.

[0014] Furthermore, the second channel includes an upper channel and a lower channel, the upper channel is arranged between the second rotating section assembly and the fourth rotating section assembly, the lower channel is arranged between the second rotating section assembly and the second input waveguide, the second rotating section assembly is connected to the second shell through the fourth bearing, the second shell is connected to the lower channel, the upper channel is connected to the rotating cavity, and can rotate with the rotating cavity, the lower channel is connected to the fixed base, and does not rotate with the rotating cavity, the rotating section assembly includes a pin, a supporting medium and a fixing nut, the pin is connected to the first channel or the second channel through the supporting medium, the fixing nut is used to limit the bearing, in order to prevent rotation interference and collision, a structural table is designed for rotation limitation, in order to improve the consistency of indicators during the rotation process, medium support and threaded fixing structures are designed to improve the concentricity of the inner and outer conductors of the coaxial segment, the first channel and the second channel are both provided with a ridge waveguide structure, the ridge waveguide structure is arranged at the corners of the first channel and the second channel, and the ridge waveguide structure is designed for the first channel and the second channel to optimize the electrical performance.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention adopts a coplanar dual-axis dual-channel structure, the pitch plane rotation range can reach ±70°, and the azimuth plane rotation range can reach ±110°, which can meet the scanning angle requirements of the phased array.

[0017] 2. The two rotation channels of the present invention are composed of an input waveguide, a transfer waveguide, a coaxial rotation section and an output waveguide. In order to have excellent electrical performance, a ridge waveguide structure is designed to optimize the electrical performance. In order to prevent rotation interference and collision, a structural platform is designed to limit the rotation. In order to improve the consistency of indicators during the rotation process, dielectric support and threaded fixing structures are designed to improve the concentricity of the inner and outer conductors of the coaxial section.

[0018] 3. The present invention can be used in high-power applications, aerospace environments, etc.

[0019] 4. The present invention is a high-power broadband dual-axis dual-channel rotary joint, which provides dual-channel feeding for the antenna during the rotation process. In order to solve the problem that the two-axis rotary joints need to rotate at the same time, reasonable structural design and layout are used to solve the problem of small rotation angle, and through HFSS simulation and optimization, the two channels have obtained good electrical performance. The product has a usage bandwidth of 15%, and can be used in phased array antenna applications with large-angle scanning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0021] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0022] Figure 3 The structure of the present invention is schematically shown Figure 3 ;

[0023] Figure 4 for Figure 3 Section view in the AA direction Figure 1 ;

[0024] Figure 5 for Figure 3 Section view in the AA direction Figure 2 ;

[0025] Figure 6 for Figure 5 A partial enlarged view of part B;

[0026] Figure 7 It is a structural schematic diagram of the rotating cavity in the present invention;

[0027] Figure 8 It is a structural schematic diagram of the fixed base in the present invention.

[0028] In the figure: 1-rotating bracket; 11-mounting hole; 2-rotating cavity; 21-stop; 3-fixed base; 31-boss; 41-first input waveguide; 42-second input waveguide; 43-first output waveguide; 44-second output waveguide; 5-first channel; 51-first rotating section assembly; 53-third rotating section assembly; 6-second channel; 62-lower channel; 63-second rotating section assembly; 64-upper channel; 65-fourth rotating section assembly; 71-pin; 72-support medium; 73-fixing nut; 81-second shell; 82-first shell; 9-ridge waveguide structure. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and the accompanying drawings.

[0030] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0031] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0034] Embodiment 1:

[0035] like Figure 1-4 As shown, a dual-axis dual-channel large-angle rotation joint includes a fixed base 3, a rotating cavity 2 and a rotating bracket 1.

[0036] The rotating bracket 1 is provided with a mounting hole 11 , and the mounting hole 11 is used for mounting an antenna. The rotating bracket 1 is rotatably connected to the rotating cavity 2 .

[0037] The rotating cavity 2 is rotatably connected to the fixed base 3, and a first channel 5 and a second channel 6 are provided inside the rotating cavity 2. The first channel 5 and the second channel 6 are both connected to a rotating section assembly, one end of the first channel 5 is connected to a first input waveguide 41, and the other end of the first channel 5 is connected to a first output waveguide 43, one end of the second channel 6 is provided with a second input waveguide 42, and the other end of the second channel 6 is provided with a second output waveguide 44.

[0038] By providing the rotating cavity 2 and the rotating bracket 1, the rotating joint can perform horizontal rotation and pitch swing, with a larger rotation range. At the same time, the dual-channel setting makes the electrical circuits independent of each other, and the channel isolation is greatly improved.

[0039] Embodiment 2:

[0040] On the basis of Example 1, Figure 5 As shown, the rotating segment assembly includes a first rotating segment assembly 51 , a second rotating segment assembly 63 , a third rotating segment assembly 53 , and a fourth rotating segment assembly 65 .

[0041] The first rotating section assembly 51 and the third rotating section assembly 53 are connected to the first channel 5 , and the second rotating section assembly 63 and the fourth rotating section assembly 65 are connected to the second channel 6 .

[0042] The first rotating section assembly 51 is arranged below the second rotating section assembly 63, and the first rotating section assembly 51 and the second rotating section assembly 63 are arranged coaxially. The third rotating section assembly 53 and the fourth rotating section assembly 65 are both arranged horizontally, and the third rotating section assembly 53 and the fourth rotating section assembly 65 are arranged coaxially.

[0043] By replacing the waveguide with a rotating segment assembly, under the premise of normal rotation, not only the bandwidth requirements can be met, but also the output electrical indicators can be met.

[0044] Since the rotary joint requires both horizontal and pitch rotation, two rotating components are provided for rotation in two directions respectively. Since there are two channels, each channel requires rotation in two directions, and thus each channel requires two rotating segment assemblies to ensure that the bandwidth meets the requirements.

[0045] The fixed base 3 is rotatably connected to the rotating cavity 2 via a first bearing, and the axis of the first bearing is vertically arranged.

[0046] The first bearing is arranged horizontally, and the rotating cavity 2 can realize horizontal rotation through the first bearing.

[0047] The rotating cavity 2 is rotatably connected to the rotating bracket 1 via a second bearing, and the axis of the second bearing is horizontally arranged.

[0048] The second bearing is vertically arranged, and two second bearings are provided. The two second bearings are respectively arranged at both ends of the rotating cavity 2, and are symmetrically arranged with the axis of the rotating cavity 2 as the center. The rotating bracket 1 can adjust the pitch angle in the vertical direction through the second rotating bearing.

[0049] The first rotating section assembly 51 is connected to a first housing 82 via a third bearing, and the first housing 82 is connected to the fixed base 3 .

[0050] In order to ensure the transmission of microwaves, the vertical rotation center of the first channel 5 and the second channel 6 needs to be set at the center of the rotating cavity 2. Therefore, the rotation centers of the first channel 5 and the second channel 6 should be coaxially arranged. In order to provide good support for the rotating section assembly internally, the first shell 82 and the second shell 81 need to be arranged. When the rotating cavity 2 rotates horizontally, the first shell 82 and the second shell 81 do not rotate.

[0051] Embodiment 3:

[0052] On the basis of Example 2, Figure 7-8As shown, the second channel 6 includes an upper channel 64 and a lower channel 62, the upper channel 64 is arranged between the second rotating section assembly 63 and the fourth rotating section assembly 65, the lower channel 62 is arranged between the second rotating section assembly 63 and the second input waveguide 42, the second rotating section assembly 63 is connected to the second shell 81 through the fourth bearing, and the second shell 81 is connected to the lower channel 62.

[0053] The upper channel 64 is connected to the rotating cavity 2 and can rotate along with the rotating cavity 2 , while the lower channel 62 is connected to the fixed base 3 and does not rotate along with the rotating cavity.

[0054] The rotating section assembly includes a pin 71, a supporting medium 72 and a fixing nut 73. The pin 71 is connected to the first channel 5 or the second channel 6 through the supporting medium 72. The fixing nut 73 is used to limit the bearing.

[0055] In order to prevent rotation interference and collision, a structural table is designed to limit the rotation. In order to improve the consistency of indicators during the rotation process, dielectric support and threaded fixing structures are designed to improve the concentricity of the inner and outer conductors of the coaxial section.

[0056] It also includes a structural platform, which includes a stopper 21 connected to the rotating cavity 2 and a boss 31 connected to the fixed base 3, the boss 31 is used to limit the stopper 21, the boss 31 is arc-shaped, and the stopper 21 is arranged on the rotation path of the boss 31. When the boss 31 rotates to a certain angle, the stopper 21 limits the boss 31, so that the rotating cavity 2 cannot continue to rotate.

[0057] The first channel 5 and the second channel 6 are both provided with a ridge waveguide structure 9, and the ridge waveguide structure 9 is stepped.

[0058] The ridge waveguide structure 9 is disposed at a corner of the first channel 5 and the second channel 6 .

[0059] A ridge waveguide structure 9 is designed for the first channel 5 and the second channel 6 to optimize the electrical performance.

[0060] Specific working principle: This product is mainly composed of two curved transmission channels, a rotating cavity, a fixed base and a rotating bracket. The input ports and output ports of the two channels are arranged vertically, and the rotating parts of the two channels use two coaxial coaxial lines. A high-power ultra-wide angle scanning phased array radiating antenna is required. Each channel uses four bearings and a coaxial segment structure to position the transmission channel in azimuth and elevation, so that the two rotating axes are in the same plane. Limiting tables are set on the rotating cavity and the fixed flange to prevent the waveguide of the transmission channel from interfering and colliding during rotation and affecting the electrical performance. Finally, the antenna will be installed on the swing bracket, which can rotate in azimuth and elevation at the same time.

[0061] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A dual-axis dual-channel large-angle rotation joint, characterized in that: It comprises a fixed base (3), a rotating cavity (2) and a rotating bracket (1); The rotating bracket (1) is provided with a mounting hole (11), and the rotating bracket (1) is rotatably connected to the rotating cavity (2); The rotating cavity (2) is rotatably connected to a fixed base (3); a first channel (5) and a second channel (6) are provided inside the rotating cavity (2); the first channel (5) and the second channel (6) are both connected to a rotating section assembly; one end of the first channel (5) is connected to a first input waveguide (41); the other end of the first channel (5) is connected to a first output waveguide (43); one end of the second channel (6) is provided with a second input waveguide (42); and the other end of the second channel (6) is provided with a second output waveguide (44).

2. The dual-axis dual-channel large-angle rotation joint according to claim 1, characterized in that: The rotating segment assembly comprises a first rotating segment assembly (51), a second rotating segment assembly (63), a third rotating segment assembly (53), and a fourth rotating segment assembly (65); The first rotating section assembly (51) and the third rotating section assembly (53) are connected to the first channel (5), and the second rotating section assembly (63) and the fourth rotating section assembly (65) are connected to the second channel (6).

3. The dual-axis dual-channel large-angle rotation joint according to claim 2, characterized in that: The first rotating section assembly (51) is arranged below the second rotating section assembly (63), the first rotating section assembly (51) and the second rotating section assembly (63) are arranged coaxially, the third rotating section assembly (53) and the fourth rotating section assembly (65) are both arranged horizontally, and the third rotating section assembly (53) and the fourth rotating section assembly (65) are arranged coaxially.

4. The dual-axis dual-channel large-angle rotation joint according to claim 1, characterized in that: The fixed base (3) is rotatably connected to the rotating cavity (2) via a first bearing, and the axis of the first bearing is vertically arranged; The rotating cavity (2) is rotatably connected to the rotating bracket (1) via a second bearing, and the axis of the second bearing is arranged horizontally.

5. The dual-axis dual-channel large-angle rotation joint according to claim 3, characterized in that: The second channel (6) comprises an upper channel (64) and a lower channel (62); the upper channel (64) is arranged between the second rotating section assembly (63) and the fourth rotating section assembly (65); the lower channel (62) is arranged between the second rotating section assembly (63) and the second input waveguide (42); the second rotating section assembly (63) is connected to a second shell (81) via a fourth bearing; and the second shell (81) is connected to the lower channel (62).

6. The dual-axis dual-channel large-angle rotation joint according to claim 1, characterized in that: The rotating section assembly comprises a pin (71), a supporting medium (72) and a fixing nut (73); the pin (71) is connected to the first channel (5) or the second channel (6) through the supporting medium (72); and the fixing nut (73) is used to limit the bearing.

7. The dual-axis dual-channel large-angle rotation joint according to claim 1, characterized in that: The first channel (5) and the second channel (6) are both provided with a ridge waveguide structure (9).

8. The dual-axis dual-channel large-angle rotation joint according to claim 1, characterized in that: It also comprises a structural platform, the structural platform comprising a stopper (21) connected to the rotating cavity (2) and a boss (31) connected to the fixed base (3), the boss (31) being used to limit the stopper (21).

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