Rotary combination device

Abstract

The utility model relates to a rotary combination device which comprises an electric slip ring and a joint body. The joint rotor part is provided with a rotor shaft hole and a first annular groove, the joint rotor part is provided with a first connector and a first bearing, the end, away from an opening, of the first annular groove is provided with a first radio frequency coaxial connector, and the first connector is connected with the first radio frequency coaxial connector through a coaxial line. The joint rotor part is rotatably connected with the joint stator part through a first bearing; the joint stator part is provided with a stator shaft hole and a second annular groove, the first bearing, the rotor shaft hole, the first annular groove, the stator shaft hole and the second annular groove are coaxially arranged, the rotor shaft hole and the stator shaft hole are oppositely arranged and communicated, and the opening ends of the first annular groove and the second annular groove are oppositely arranged and communicated. A second connector is arranged on the side wall of the second annular groove and penetrates out of the joint stator part. Compared with an existing rotating structure, the rotating structure can transmit radio frequency microwave signals and electric energy of different powers at the same time, and the transmission requirement is met.

Description

Technical Field

[0001] The present application relates to the technical field of radar communication systems, and in particular to a rotating combination device. Background Art

[0002] In microwave communication systems or radar systems, in order to ensure the effective transmission of microwave signals between the dynamic antenna system and the static system and realize the antenna's signal search, tracking, target measurement and other functions, a rotating structure such as a rotary joint needs to be installed between the two.

[0003] However, the existing rotating structures, such as patent document CN107039715A, can only conduct microwave signals of a single power through a coaxial waveguide cavity, and cannot adapt to variable conduction requirements.

[0004] Therefore, how to make the rotating structure conduct radio frequency microwave signals of different powers at the same time has become a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In order to enable the rotating structure to simultaneously conduct radio frequency microwave signals of different powers, the present application provides a rotating combination device.

[0006] A rotating assembly device is provided to achieve the purpose of the utility model, comprising:

[0007] Electric slip ring and joint body;

[0008] The joint body includes a joint stator part and a joint rotor part;

[0009] The joint rotor part is respectively provided with a rotor shaft hole and a first annular groove as its waveguide channel, the joint rotor part is provided with a first joint and a first bearing, the first annular groove is provided with a first RF coaxial connector at one end away from the opening, the first joint is connected to the first RF coaxial connector via a coaxial line, and the joint rotor part is rotatably connected to the joint stator part via the first bearing;

[0010] The joint stator part is respectively provided with a stator shaft hole and a second annular groove as its waveguide channel, the first bearing, the rotor shaft hole, the first annular groove, the stator shaft hole and the second annular groove are coaxially arranged, the rotor shaft hole and the stator shaft hole are arranged oppositely and connected, the number of the first joints, the first annular grooves and the second annular grooves is consistent and arranged one by one, the annular axial direction and the opening direction of the first and second annular grooves are consistent, the opening ends of the first annular groove and the second annular groove are arranged oppositely and connected, and the side wall of the second annular groove is provided with a second joint, and the second joint passes through the joint stator part;

[0011] The rotor of the electric slip ring is connected to the joint rotor part, and the stator of the electric slip ring is connected to the joint stator part.

[0012] Compared with the existing rotating structure, the present application can simultaneously conduct radio frequency microwave signals and electrical energy signals of different powers, and flexibly adapt to conduction requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram showing the structure of a rotating assembly device according to an embodiment of the present application;

[0014] Figure 2 A schematic diagram showing the structure of a rotating assembly device according to an embodiment of the present application;

[0015] Figure 3 A partial structural schematic diagram of a rotating assembly device according to an embodiment of the present application is shown, showing the connection structure between the joint rotor part and the stator conducting part;

[0016] Figure 4 A schematic diagram showing a partial structure of a joint stator part of an embodiment of the present application is shown;

[0017] Figure 5 Show Figure 4 A partial enlarged view of

[0018] Figure 6 A schematic diagram showing the structure of the shaft section of an embodiment of the present application;

[0019] Figure 7 A schematic diagram showing the structure of the shaft section of an embodiment of the present application;

[0020] Figure 8 A schematic diagram showing the structure of a rotating assembly device according to an embodiment of the present application;

[0021] Fig. 9 A schematic diagram showing the structure of a rotating assembly device according to an embodiment of the present application;

[0022] Fig.10 A schematic diagram showing the structure of a rotating assembly device according to an embodiment of the present application;

[0023] Fig.11 A schematic diagram showing the structure of a rotating assembly device according to an embodiment of the present application;

[0024] Fig.12 A schematic diagram showing the structure of a rotating assembly device according to an embodiment of the present application;

[0025] Fig.13 A schematic diagram showing the structure of a rotating assembly device according to an embodiment of the present application;

[0026] Fig.14 A schematic diagram showing the structure of an electric slip ring according to an embodiment of the present application is shown;

[0027] Fig.15 A schematic diagram of the connection structure between the rotor and stator of the electric slip ring according to an embodiment of the present application is shown.

[0028] Joint rotor part 100, rotor shaft hole 110, first annular groove 120, first joint 130, coaxial line 140, first bearing 150, second bearing 160, stator shaft hole 210, third shaft hole 211, second annular groove 220, coaxial line connection groove 230, first RF coaxial connector 240, insulator 241, center pin 242, second RF coaxial connector 250, second joint 260, shaft joint part 270, shaft Joint cover plate 271, protective shell 300, flange connection plate 310, rotor conduction pipe 400, stator conduction pipe 500, center rod 600, first sealing ring 700, joint body 800, electric slip ring 900, rotor connector 910, rotor connecting wire 920, rotor of electric slip ring 930, conductive ring 931, slip ring bearing 940, stator connector 950, stator connecting wire 960, stator of electric slip ring 970, brush wire 971. DETAILED DESCRIPTION

[0029] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0030] Among them, it should be understood that the directions or positional relationships indicated by terms such as "length", "width", "height", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0032] The present application provides a rotating assembly device, including an electric slip ring and a joint body; the joint body includes a joint stator part and a joint rotor part 100. Among them:

[0033] The joint rotor part 100 is respectively provided with a rotor shaft hole 110 and a first annular groove 120 as its waveguide channel, and the joint rotor part 100 is provided with a first joint 130 and a first bearing 150. The first end of the first annular groove facing away from the opening is provided with a first RF coaxial connector 240. The first joint 130 is connected to the first RF coaxial connector 240 through the coaxial line 140. The joint rotor part 100 is rotatably connected to the joint stator part through the first bearing 150.

[0034] The joint stator part is respectively provided with a stator shaft hole 210 and a second annular groove 220 as its waveguide channel, the first bearing 150, the rotor shaft hole 110, the first annular groove 120, the stator shaft hole 210 and the second annular groove 220 are coaxially arranged, the (signal transmission) outlet of the rotor shaft hole 110 and the (signal transmission) entrance of the stator shaft hole 210 are relatively arranged and connected, the outlet of the rotor shaft hole 110 matches and abuts the entrance of the stator shaft hole 210 for waveguide and signal transmission between the two.

[0035] The number of the first joints 130, the first annular groove 120 and the second annular groove 220 is consistent and they are arranged one by one. The annular axial direction and the opening direction of the first and second annular grooves 220 are consistent. The first and second annular grooves 220 match each other. The opening ends of the first annular groove 120 and the second annular groove 220 are relatively arranged and connected. The side wall of the second annular groove 220 is provided with a second joint 260. One connecting end of the second joint 260 is connected to the inner wall of the second annular groove 220 to obtain a microwave signal, and the other connecting end of the second joint 260 passes through the side wall of the joint stator part.

[0036] It should be noted that the rotor shaft hole 110, the first annular groove 120, the stator shaft hole 210, the second annular groove 220 (as well as the rotor conductive pipe 400 and the stator conductive channel described later) can all be regarded as waveguides. A waveguide is a hollow conductive structure that guides electromagnetic waves to travel along a path. The conductive inner wall of the waveguide reflects the electromagnetic wave energy along the path with low loss and close to the speed of light.

[0037] It should be noted that the present application does not specifically limit the specific type of the electric slip ring and the connection structure of its rotor and stator, as long as the function of "electrical signal transmission between the rotating part and the static part" of the electric slip ring can be realized.

[0038] In the rotating assembly provided in the present application, there are two paths for microwave transmission. One is the inner wall of the connecting cavity formed by the rotor shaft hole 110 and the stator shaft hole 210 coaxially arranged with the first bearing 150, and the path of axial transmission along the inner wall. This path can transmit microwaves with a power of about 5KW; the other path is the transmission path composed of the first joint 130, the coaxial line 140, the first RF coaxial connector 240, the first annular groove 120, the second annular groove 220, (the second RF coaxial connector 250) and the second joint 260, with the coaxial line 140 as the main conduction carrier, which can transmit microwaves with a power of about 100W. It should be noted that the applicable power range of the two independent waveguide paths can be flexibly adjusted according to actual needs. About 5KW and about 100W are only examples for easy understanding and cannot be understood as limitations on the present application.

[0039] The present application sets a coaxial rotor shaft hole 110 and a stator shaft hole 210. During the rotation of the joint rotor part 100, the transmission outlet of the rotor shaft hole 110 and the transmission inlet of the stator shaft hole 210 are always connected and abutted, ensuring the effective transmission of microwave signals between the two transmission interfaces. The first annular groove 120 is arranged outside the rotor shaft hole 110, and the two cavities are independent of each other; the second annular groove 220 is arranged outside the stator shaft hole 210, and the two cavities are independently arranged. The first and second annular grooves 220 match each other, and the first and second annular grooves 220 are coaxially arranged with the rotor shaft hole 110. Therefore, during the rotation of the joint rotor part 100, the opening ends of the first annular groove 120 and the second annular groove 220 are always connected and abutted, which can ensure the effective transmission of microwave signals between the two transmission interfaces.

[0040] Compared with the existing rotating structure that can only transmit a single power, the present application provides a rotating combination device that can simultaneously transmit radio frequency microwave signals and electrical energy signals of different powers, adapt to changing transmission requirements, expand the application range of microwave rotating joints, and better realize signal transmission.

[0041] In a possible implementation, the rotor part is provided with a first annular shaft hole, one end of the coaxial line is connected to the output end of the rotating part to receive a signal, and the other end of the coaxial line passes through the first annular shaft hole and is connected to the first RF coaxial connector of the first annular groove 120. The rotor shaft hole is a circular through hole, and its cross section along the axial direction (also the rotational axial direction of the rotor part) is a circular hole. The first annular shaft hole is an annular through hole, and its cross section along the axial direction (also the rotational axial direction of the rotor part) is annular. The first annular shaft hole is coaxially arranged with the rotor shaft hole, and the rotor shaft hole is located at the center of the first annular shaft hole. Further, one end of the coaxial line is connected to the output end of the rotating part through the first joint 130.

[0042] In a possible implementation, the coaxial line 140 is located in the rotor shaft hole 110, one end of the coaxial line 140 passes through the rotor shaft hole 110 to be connected to the first joint 130, and the other end of the coaxial line 140 passes through the rotor shaft hole 110 to be connected to the first RF coaxial connector 240 of the first annular groove 120. The space utilization is improved, the structure of the rotating assembly device is more compact, and the assembly clearance and rotation fluctuation of the parts of the rotating assembly device are reduced.

[0043] Furthermore, a coaxial line connection groove 230 is provided at one end of the joint stator portion along the axial direction of the stator shaft hole 210 (or one end of the shaft joint portion 270 along the axial direction of the third shaft hole 211), and the first RF coaxial connector 240 is located outside the first annular groove 120 on one side (connection end) and inside the coaxial line connection groove 230, and an operation spacing is provided between the connection end of the first RF coaxial connector 240 and the inner wall of the coaxial line connection groove 230. The coaxial line 140 passes from the rotor shaft hole 110 to the coaxial line connection groove 230, and is connected to one side of the first RF coaxial connector 240 in the coaxial line connection groove 230, and the other side of the first RF coaxial connector 240 is located in the first annular groove 120 and connected to the inner wall of the first annular groove 120 for waveguide. The connection between the first RF coaxial connector 240 and the coaxial line 140 is placed outside the narrow and small rotor shaft hole 110 and the first annular groove 120, so as to reduce the difficulty of the disassembly operation of the coaxial line 140 and facilitate the connection and disassembly operation.

[0044] Furthermore, there are more than two first joints 130, and the joint rotor part 100 is provided with a second bearing 160 on the annular radial outer wall of the first annular groove 120, and the first bearing 150 and the second bearing 160 are coaxially arranged. The present application provides multi-point support by adding bearings. Even if the axial length of the joint rotor part 100 is very long, the possibility of deformation will be reduced due to the multi-point support of the first bearing 150 and the second bearing 160, thereby preventing unnecessary friction loss caused by deformation.

[0045] Furthermore, it also includes a center rod 600; the center rod 600 is located in the rotor shaft hole 110, one end of the center rod 600 passes through the rotor shaft hole 110 and enters the stator shaft hole 210, the center rod 600 rotates in the stator shaft hole 210, the center rod 600 is provided with a rod hole, the coaxial line 140 is fixed to the inner wall of the rod hole of the center rod 600, one end of the coaxial line 140 passes through the rod hole and the rotor shaft hole 110 and is connected to the first joint 130, and the other end of the coaxial line 140 passes through the center rod 600 to be connected to the first RF coaxial connector 240 of the first annular groove 120. The hard center rod 600 is used for support to reduce the deformation of the excessively long coaxial line 140, and the coaxial line 140 can be mechanically protected, thereby reducing the damage of the coaxial line 140 caused by unnecessary friction damage.

[0046] In a possible implementation, the rotor shaft hole 110 and the stator shaft hole 210 match each other, and their hole diameters are consistent.

[0047] In a possible implementation, a first sealing ring 700 (also called a first friction ring) is provided at the connection between the rotor shaft hole 110 and the stator shaft hole 210. The first sealing ring 700 is located between the outlet of the rotor shaft hole 110 and the entrance of the stator shaft hole 210. The annular axial direction of the first sealing ring 700 is consistent with the axial direction of the rotor shaft hole 110, and is preferably coaxially arranged. In order to ensure the normal rotation of the joint rotor part 100 on the joint stator part, the rotor shaft hole 110 of the joint rotor part 100 and the stator shaft hole 210 of the joint stator part are only aligned, connected and abutted, pressed as close as possible to reduce the assembly gap, and cannot be fixedly connected. The present application improves the sealing performance of the internal cavity formed by the connection between the rotor shaft hole 110 and the stator shaft hole 210 as much as possible by adding a first sealing ring 700, thereby improving the signal transmission quality.

[0048] In a possible implementation, both the first connector 130 and the second connector 260 are SMA connectors.

[0049] In a possible implementation, a second RF coaxial connector 250 is provided on the side wall of the second annular groove 220, the second RF coaxial connector 250 is consistent with the first RF coaxial connector 240, the inner wall of the second annular groove 220 is connected to the second connector 260 through the second RF coaxial groove, one end of the second connector 260 is connected to the second RF coaxial connector 250, and the other end passes through the side wall of the joint stator part. Further, the second RF coaxial connector 250 is located at the end of the second annular groove 220 away from its opening.

[0050] In a possible implementation, a rotor conductive conduit 400 and a stator conductive conduit 500 are further included. The inlet of the rotor conductive conduit 400 is communicated with the first axial hole, and the outlet of the rotor conductive conduit 400 passes through the side wall of the joint rotor part 100. The inlet of the stator conductive conduit 500 is communicated with the second axial hole, and the outlet of the stator conductive conduit 500 passes through the side wall of the joint stator part. Further, there are more than two rotor conductive conduits 400 and stator conductive conduits 500.

[0051] In a possible implementation, the first connector 130, the coaxial line 140 connected thereto, the first RF coaxial connector 240, the first axial hole and the second axial hole form a group of transmission channels. There are more than two first connectors 130, and the two or more groups of transmission channels are independent of each other and can transmit more than two microwave signals at the same time.

[0052] Further, the joint stator portion includes more than two shaft joint portions 270, and the joint rotor portion 100 is rotatably connected to the shaft joint portion 270 through the first bearing 150; the number of the shaft joint portions 270 is consistent with that of the first joint 130 and they are connected one by one, the shaft joint portion 270 is provided with a second annular groove 220 and a third axial hole 211, the third axial holes 211 of more than two shaft joint portions 270 are coaxially arranged and connected in sequence to form a stator axial hole 210, and two adjacent shaft joint portions 270 are detachably connected, such as plug-in or snap-on connection, and the shaft joint portion 270 farthest from the joint rotor portion 100 is provided with a shaft joint cover plate 271, which is located at the end of the shaft joint portion 270 away from the joint rotor portion 100, and the shaft joint cover plate 271 covers the axial end opening of the third axial hole 211 of the sealing cover shaft joint portion 270.

[0053] Furthermore, in addition to the shaft section 270, the joint stator part also includes a stator conducting part, the stator conducting part is provided with a third shaft hole 211, and the inlet of the stator conducting pipe 500 is connected to the third shaft hole 211 of the stator conducting part. The joint rotor part 100 is rotatably connected to the stator conducting part through the first bearing 150, and the two or more shaft sections 270 are coaxially distributed in sequence at one end of the stator conducting part away from the joint rotor part 100, and the shaft section 270 closest to the stator conducting part is connected to the stator conducting part, preferably in a detachable connection.

[0054] In a possible implementation, there are more than two first bearings 150 and second bearings 160, preferably two, and dual bearing support to ensure the stability of the rotary joint and reduce its rotation fluctuation. A second sealing ring is also provided between the open end of the first annular groove 120 and the open end of the second annular groove 220, and the axial direction of the second sealing ring is consistent with the annular axial direction of the first annular groove 120, preferably coaxially arranged. Further, the second sealing ring is fixedly connected to the open end of the first annular groove 120.

[0055] In a possible implementation, the stator and the rotor of the electric slip ring are provided with a through hole at the axis of the electric slip ring, and the through holes of the two are arranged oppositely to form a shell cavity. The joint body is installed in the shell cavity of the electric slip ring, the joint rotor part is coaxially fixedly connected with the rotor of the electric slip ring and rotates synchronously, and the joint stator part is fixedly connected with the stator of the electric slip ring. Therefore, the electric slip ring is also called a protective shell.

[0056] Furthermore, a first opening is provided at one end of the protective shell 300, and one end of the joint stator part is located in the first opening along the side wall of the radial direction of rotation of the joint rotor part 100. The end of the protective shell 300 with the first opening is fixedly connected to the joint stator part, the joint rotor part 100 is located in the protective shell 300, and the joint rotor part 100 rotates in the protective shell 300.

[0057] Furthermore, the protective shell 300 is respectively provided with a first opening and a second opening at both ends along the rotation axis of the joint rotor part 100. One end of the joint rotor part 100 along its rotation axis passes through the second opening to pass through the protective shell 300. The joint rotor part 100 rotates in the second opening. The first joint 130 and the entrance of the rotor conduction channel are located at one end of the joint rotor part 100 passing through the protective shell 300.

[0058] Furthermore, a flange connection plate 310 is provided around one end of the joint rotor part 100 along the rotation axis thereof, and the flange connection plate 310 is rotatably connected to the second opening side wall of the protective shell 300 .

[0059] In a possible implementation, one end of the stator conducting part is located in the protective shell 300 , and the protective shell 300 has an end with a first opening connected to the radial side wall of the stator conducting part along the stator shaft hole 210 , and the outlet of the stator conducting pipe 500 connected to the third shaft hole 211 passes through the protective shell 300 .

[0060] In a possible implementation, the first RF coaxial connector 240 includes a center needle 242 and an insulator 241. The insulator 241 penetrates the side wall of the first annular groove 120, that is, one side of the insulator 241 faces the inside of the first annular groove 120, and the other side faces the outside of the first annular groove 120 and also faces the outside of the joint rotor part 100, so that the center needle 242 is insulated from the side wall of the joint rotor part 100 and the side wall of the first annular groove 120, and the center needle 242 can only transmit the signal of the coaxial line 140 to the inner wall of the first annular groove 120 with a waveguide function. One end of the center needle 242 is located outside the first annular groove 120 and connected to the coaxial line 140; the other end of the center needle 242 penetrates the insulator 241 to penetrate into the first annular groove 120, and is connected to the inner wall of the first annular groove 120 with a waveguide function. The second RF coaxial connector 250 is consistent with the first RF coaxial connector 240, and its connection structure with the side wall of the second annular groove 220 is similar.

[0061] Furthermore, the insulator 241 penetrates the side wall of the first annular groove 120 away from the opening. The insulating part is sealed and connected to the through hole of the side wall of the first annular groove 120. The insulator 241 is close to one end of the first annular groove 120 along its annular axial direction (that is, the end away from the opening), and is located at one end of this end along its annular radial direction.

[0062] In a possible implementation, a wire placement bin 320 is provided on the side wall of the flange connector of the protective shell 300 , and the excessively long portion of the wire in the joint rotor part 100 and the components that rotate with the joint rotor part 100 can be stored in the wire placement bin 320 .

[0063] In a possible implementation, the outer wall of the rotor 930 of the electric slip ring is provided with a rotor connector 920, the rotor connector 920 rotates synchronously with the rotor 930 of the electric slip ring, one end of the rotor connector 910 is connected to the wire of the external rotating component, the other end of the rotor connector 910 is connected to the rotor connecting (conducting) wire 920, the rotor connecting wire is connected to the conductive ring 931 of the electric slip ring, the stator 970 of the electric slip ring is provided with a stator connector 950 and a brush wire 971, the outer wall of the conductive ring 931 is connected to the brush wire 971, one end of the stator connector 950 is connected to the stator connecting wire 960, and the brush wire 971 is connected to the stator connecting wire 960. The other end of the stator connector 950 is electrically connected to the wire of the external fixed non-rotating component. Further, the other end of the stator connector 950 is also connected to the stator connecting wire 960, and is electrically connected to the wire of the external fixed non-rotating component through the stator connecting wire 960.

[0064] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A rotating assembly device, characterized in that: include: Electric slip ring and joint body; The joint body comprises a joint stator part and a joint rotor part; The joint rotor part is respectively provided with a rotor shaft hole and a first annular groove as its waveguide channel, the joint rotor part is provided with a first joint and a first bearing, the first annular groove is provided with a first RF coaxial connector at one end away from the opening, the first joint is connected to the first RF coaxial connector via a coaxial line, and the joint rotor part is rotatably connected to the joint stator part via the first bearing; The joint stator part is respectively provided with a stator shaft hole and a second annular groove as its waveguide channel, the first bearing, the rotor shaft hole, the first annular groove, the stator shaft hole and the second annular groove are coaxially arranged, the rotor shaft hole and the stator shaft hole are arranged oppositely and connected, the number of the first joints, the first annular grooves and the second annular grooves is consistent and arranged one by one, the annular axial direction and the opening direction of the first and second annular grooves are consistent, the opening ends of the first annular groove and the second annular groove are arranged oppositely and connected, and the side wall of the second annular groove is provided with a second joint, and the second joint passes through the joint stator part; The rotor of the electric slip ring is connected to the joint rotor part, and the stator of the electric slip ring is connected to the joint stator part.

2. The rotating assembly device according to claim 1, characterized in that: The coaxial line is located in the rotor shaft hole, one end of the coaxial line passes through the rotor shaft hole to be connected to the first joint, and the other end of the coaxial line passes through the rotor shaft hole to be connected to the first RF coaxial connector of the first annular groove.

3. The rotating assembly device according to claim 2, characterized in that: Also included is a center pole; The center rod is located in the rotor shaft hole, one end of the center rod passes through the rotor shaft hole and enters the stator shaft hole, the center rod rotates in the stator shaft hole, the center rod is provided with a rod hole, the coaxial line is fixed to the inner wall of the rod hole of the center rod, one end of the coaxial line passes through the rod hole and the rotor shaft hole and is connected to the first joint, and the other end of the coaxial line passes through the center rod to be connected to the first RF coaxial connector of the first annular groove.

4. The rotating assembly device according to claim 1, characterized in that: A first sealing ring is provided at the connection point between the rotor shaft hole and the stator shaft hole. The first sealing ring is located between the rotor shaft hole outlet and the stator shaft hole inlet. The annular axial direction of the first sealing ring is consistent with the axial direction of the rotor shaft hole.

5. The rotating assembly device according to claim 1, characterized in that: The first connector and the second connector are both SMA connectors.

6. The rotating assembly device according to claim 1, characterized in that: Also included is a stator conduction duct; The inlet of the stator conductive conduit is communicated with the second annular groove, and the outlet of the stator conductive conduit passes through the side wall of the joint stator part.

7. The rotating assembly device according to claim 1, characterized in that: There are two or more first connectors.

8. The rotating assembly device according to claim 7, characterized in that: The joint stator part includes more than two shaft joint parts, and the joint rotor part is rotatably connected to the shaft joint parts through a first bearing; The number of the shaft joints is consistent with that of the first joints and they are connected one by one. The shaft joints are provided with a second annular groove and a third axial hole. The third axial holes of two or more shaft joints are coaxially arranged and connected in sequence to form a stator axial hole. Two adjacent shaft joints are detachably connected.

9. The rotating assembly device according to claim 1, characterized in that: The first RF coaxial connector includes a center pin and an insulator; The insulator passes through the side wall of the first annular groove, one end of the center needle is located outside the first annular groove and connected to the coaxial line, and the other end of the center needle passes through the insulator to penetrate into the first annular groove.

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