Multi-core photoelectric slip ring

Abstract

The application provides a multi-core photoelectric slip ring, which comprises an electric slip ring structure and an optical slip ring structure, and the electric slip ring structure and the optical slip ring structure form a planetary gear structure; the electric slip ring structure is a sun gear of the planetary gear structure, and the optical slip ring structure is a planetary gear in the planetary gear structure. The multi-core photoelectric slip ring further comprises a first multi-core photoelectric slip ring shell and a second multi-core photoelectric slip ring shell which are arranged outside the multi-core photoelectric slip ring; a mover part is arranged in the first multi-core photoelectric slip ring shell; a stator part is arranged in the second multi-core photoelectric slip ring shell; and a dynamic sealing structure is arranged between the first multi-core photoelectric slip ring shell and the second multi-core photoelectric slip ring shell. According to the application, the optical slip ring and the electric slip ring are combined in a specific planetary gear structure, so that the optical fiber logging and the conventional electric logging can be simultaneously and reliably transmitted according to construction requirements in the process of optical cable lifting and lowering in actual logging, and the optical signal attenuation rate and the insertion loss are small in the transmission process.

Description

Technical Field

[0001] This invention belongs to the field of signal transmission equipment, and specifically relates to a multi-core optoelectronic slip ring. Background Technology

[0002] Optical slip rings are generally used to transmit electrical energy, electrical signals, optical energy, and optical signals between relatively rotating parts, ensuring the normal transmission of energy or signals in rotating connections. Typically, the smooth ring is installed at the center of the through-hole electrical slip ring, rotating coaxially and synchronously with it, enabling the transmission of high-definition video signals, etc. When transmitting signals via optical fiber, the lack of contact coupling in the rotating connection results in a long lifespan. Another type of optical slip ring structure involves directly placing an optical fiber or fiber collimator within the through-hole conductive slip ring, forming a compact one-optical-multiple-electric slip ring.

[0003] Existing optoelectronic slip rings have complex structures, especially smooth slip rings, which cannot reliably transmit single-mode, multi-mode, and electrical signals simultaneously. They can only be optimized for optical signals of certain frequencies and cannot guarantee that the attenuation rate will meet the requirements during rotation. In particular, distributed fiber optic logging has strict requirements for insertion loss and loss fluctuation, and changes in loss can cause the signal-to-noise ratio of the logging to fail to meet the requirements. There is a need to design a simple structure that can accommodate a mix of single-mode and multi-mode smooth slip rings and electrical slip rings, while ensuring that the loss and loss fluctuation meet the requirements for practical applications.

[0004] Fully distributed fiber optic sensing offers unique advantages such as resistance to electromagnetic interference, low loss, radiation resistance, small size, and ease of deployment. It enables comprehensive, uninterrupted, embedded, non-destructive monitoring of oil well stress, strain, temperature, displacement, and vibration. However, it suffers from drawbacks such as low spatial resolution. Conventional electrical logging offers advantages such as a complete range of technologies, high measurement accuracy, and high spatial resolution, but it cannot perform full-time, full-space dynamic monitoring. Existing systems can only transmit one optical signal and cannot simultaneously transmit single-mode and multi-mode signals. Therefore, a reliable device is needed to simultaneously support the transmission of multiple optical and electrical signals. Summary of the Invention

[0005] To address the above problems, this invention proposes a multi-core photoelectric slip ring, which includes an electric slip ring structure and a smooth ring structure, wherein the electric slip ring structure and the smooth ring structure form a planetary gear structure.

[0006] in,

[0007] The slip ring structure is the sun gear of the planetary gear structure, and the slip ring structure is the planetary gear in the planetary gear structure.

[0008] The multi-core photoelectric slip ring also includes a first multi-core photoelectric slip ring housing and a second multi-core photoelectric slip ring housing disposed outside the multi-core photoelectric slip ring;

[0009] The first multi-core optoelectronic slip ring housing is provided with a moving part;

[0010] The stator section is provided inside the housing of the second multi-core optoelectronic slip ring;

[0011] A dynamic sealing structure is provided between the first multi-core photoelectric slip ring housing and the second multi-core photoelectric slip ring housing.

[0012] Furthermore, the moving part includes a gear ring connected to the inner surface of the first multi-core photoelectric slip ring housing, a flange and an electric slip ring moving part coaxially arranged with the gear ring, and a smooth ring moving part arranged between the gear ring and the electric slip ring moving part structure;

[0013] The stator section includes a planetary carrier connected to the housing of the second multi-core photoelectric slip ring, an electric slip ring stator structure connected to the planetary carrier support section, and a smooth ring stator structure connected to the fixed tube connecting frame.

[0014] Furthermore, the flange is connected to the housing of the first multi-core photoelectric slip ring via a connector, and a gasket is provided between the connector and the housing of the first multi-core photoelectric slip ring;

[0015] Multiple smooth ring actuators are provided, and the multiple smooth ring actuators are distributed around the electric sliding ring actuator at the same angle difference along the circumferential direction.

[0016] Furthermore, the planetary carrier includes a planetary carrier support at the center of the planetary carrier and a plurality of fixed tube connecting brackets connected to the planetary carrier support.

[0017] One end of each of the multiple fixed tube connecting brackets is arranged at the same angle around the planetary carrier support part along the circumferential direction, and the other end of each of the multiple fixed tube connecting brackets is connected to the housing of the second multi-core photoelectric slip ring via the planetary carrier fixing pin.

[0018] Furthermore, the electric slip ring actuator includes an electric slip ring actuator housing, and an electric slip ring stator gear is fixed on the outer surface of the electric slip ring actuator housing. The electric slip ring stator gear is coaxially arranged with the flange.

[0019] The smooth ring actuator includes a smooth ring actuator housing, and a plurality of smooth ring stator gears are fixed on the outer surface of the smooth ring actuator housing. The plurality of smooth ring stator gears mesh with an electric slip ring stator gear and a gear ring.

[0020] Furthermore, the electric slip ring stator structure includes an electric slip ring stator, the electric slip ring stator is coaxially connected to an electric slip ring stator fixing tube, and an electric slip ring stator limiting structure is installed between the electric slip ring stator fixing tube and the electric slip ring stator;

[0021] The smooth ring stator structure includes a smooth ring stator, which is coaxially connected to a smooth ring stator fixing tube, and a smooth ring stator limiting structure is installed between the smooth ring stator fixing tube and the smooth ring stator.

[0022] Furthermore, an electrical signal output terminal is provided at the end of the slip ring stator away from the slip ring mover;

[0023] The optical signal output terminal is provided at the end of the smooth ring stator away from the smooth ring mover;

[0024] An electrical signal input terminal is provided at one end of the electric slip ring mover near the electric slip ring stator gear;

[0025] The smooth ring mover is provided with an optical signal input terminal at one end near the smooth ring stator gear.

[0026] Furthermore, the center-to-center distance between the electric slip ring stator fixing tube and the smooth ring stator fixing tube, the center-to-center distance between the electric slip ring mover and the smooth ring mover, and the center-to-center distance between the electric slip ring stator and the smooth ring stator are the same;

[0027] The arrangement of the electric slip ring stator fixing tube and the smooth ring stator fixing tube, the arrangement between the electric slip ring mover and the smooth ring mover, and the arrangement between the electric slip ring stator and the smooth ring stator correspond to each other.

[0028] Furthermore, the number of the smooth ring structures is greater than or equal to two;

[0029] The smooth ring structure includes one of a single-mode smooth ring and a multi-mode smooth ring;

[0030] The smooth ring structure includes both single-mode smooth rings and multi-mode smooth rings.

[0031] Furthermore, the multi-core photoelectric slip ring includes an electric slip ring structure and a smooth ring structure, and the electric slip ring structure and the smooth ring structure form a planetary gear structure;

[0032] Wherein, the smooth ring structure is the sun gear of the planetary gear structure, and the electric slip ring structure is the planetary gear in the planetary gear structure.

[0033] The beneficial effects of this invention are:

[0034] Existing technologies use collimation to transmit single-channel optical signals, which cannot reliably achieve simultaneous transmission of single-mode, multi-mode, and electrical signals. This invention combines smooth rings and electrical slip rings with a specific planetary gear structure. The planetary gear structure is simple, mature, and reliable. In actual well logging, it can reliably transmit optical and electrical signals simultaneously during the raising and lowering of the optical cable (optical-electric composite cable) according to construction requirements. It also ensures low optical signal attenuation and low insertion loss during transmission. Furthermore, the number of smooth rings can be increased or decreased at any time without making basic structural modifications, based on actual needs.

[0035] In this invention, a dynamic sealing structure is provided between the first multi-core photoelectric slip ring housing and the second multi-core photoelectric slip ring housing; the dynamic sealing structure enables the housing as a whole to play a waterproof and dustproof role, while ensuring that the first multi-core photoelectric slip ring housing can rotate while remaining stationary.

[0036] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A schematic diagram of the overall structure of the multi-core photoelectric slip ring in an embodiment of the present invention is shown;

[0039] Figure 2 A top view of the multi-core optoelectronic slip ring structure in an embodiment of the present invention is shown;

[0040] Figure 3 A schematic diagram of the overall structure of the electric slip ring in the multi-core optoelectronic slip ring of this invention is shown in an embodiment of the invention.

[0041] Figure 4 This shows an overall schematic diagram of the smooth ring structure in the multi-core optoelectronic slip ring of this invention.

[0042] Figure 5 A schematic diagram of the planetary carrier structure in the multi-core optoelectronic slip ring of this invention is shown in an embodiment of the present invention. Attached image description:

[0044] 1. Connector; 2. Washer; 3. Gear ring; 4. Flange; 5. Electric slip ring stator gear; 6. Smooth ring rotor gear; 7. Electric slip ring rotor; 7-1. Electrical signal input terminal; 8. Smooth ring rotor; 8-1. Optical signal input terminal; 9. Planetary carrier; 9-1. Planetary carrier support; 9-2. Fixed tube connecting frame; 10. First multi-core photoelectric slip ring housing; 11. Planetary carrier fixing pin; 12. Electric slip ring stator structure; 12-1. Electric slip ring stator; 12-2. Electric slip ring stator fixing tube; 12-3. Electrical signal output terminal; 13. Second multi-core photoelectric slip ring housing; 14. Dynamic sealing structure; 15. Electric slip ring stator limiting structure; 16. Smooth ring stator structure; 16-1. Smooth ring stator; 16-2. Smooth ring stator fixing tube; 16-3. Optical signal output terminal; 17. Smooth ring stator limiting structure. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] This invention proposes a multi-core photoelectric slip ring, which includes an electric slip ring, a smooth ring, and a planetary gear structure.

[0047] The multi-core photoelectric slip ring proposed in this invention adopts a planetary gear structure, which includes a sun gear located at the center of the planetary gear structure, planetary gears distributed along the circumference of the sun gear, an internal gear ring disposed on the outer ring of the planetary gears, and a planet carrier connecting the sun gear and the planetary gears; the internal gear ring meshes with the planetary gears.

[0048] The multi-core photoelectric slip ring proposed in this invention, such as Figure 2 As shown, it includes an electric slip ring structure and a smooth ring structure, which together form a planetary gear structure. In this embodiment of the invention, the number of smooth ring structures is three, but not limited to three. The number of smooth ring structures can be adjusted according to the specific application.

[0049] The planetary gear structure combines a smooth ring structure and an electric slip ring structure. The electric slip ring structure is positioned at the location of the sun gear in the planetary gear structure, and is located at the center of the planetary gear structure, meshing with smooth ring structures distributed around its outer circumference. Multiple smooth ring structures are evenly distributed around the electric slip ring structure at the same angular difference along the circumferential direction. The outer circumference of the smooth ring structure meshes with a gear ring 3, which is fixed to the inner surface of the first multi-core photoelectric slip ring housing 10.

[0050] like Figure 1 As shown, the multi-core photoelectric slip ring consists of a moving part disposed within a first multi-core photoelectric slip ring housing 10 and a stator part disposed within a second multi-core photoelectric slip ring housing 13; a dynamic sealing structure 14 is provided between the first multi-core photoelectric slip ring housing 10 and the second multi-core photoelectric slip ring housing 13. The dynamic sealing structure 14 enables the housing to function as a waterproof and dustproof unit, while ensuring that the first multi-core photoelectric slip ring housing 10 rotates while the first multi-core photoelectric slip ring housing 13 remains stationary.

[0051] The moving part includes a gear ring 3 fixed to the inner surface of the first multi-core photoelectric slip ring housing 10. The gear ring 3 rotates synchronously with the first multi-core photoelectric slip ring housing 10. The first multi-core photoelectric slip ring housing 10 and the flange 4 are connected by a connector 1. The flange 4 and the gear ring 3 rotate synchronously. The flange 4 is coaxially arranged with the electric slip ring stator gear 5 and the gear ring 3. The electric slip ring stator gear 5 is disposed in the gear ring 3. Multiple smooth ring stator gears 6 are installed between the gear ring 3 and the electric slip ring stator gear 5. The angle between adjacent smooth ring stator gears 6 is the same. The smooth ring stator gears 6 mesh with the gear ring 3 and the electric slip ring stator gear 5. The minimum number of smooth ring structures is two, and the included angle between any two pairs of smooth ring structures is the same. It should be noted that in practical applications, if the required number of smooth ring structures is insufficient, mechanical gears of the same size can be used to replace the positions of the smooth ring structures.

[0052] A washer 2 can be provided between the connector 1 and the housing 10 of the first multi-core photoelectric slip ring. The washer 2 helps to seal between the flange 4 and the housing 10 of the first multi-core photoelectric slip ring. The connector 1 can be a connecting bolt.

[0053] In the above components, the flange 4 is connected to the first multi-core photoelectric slip ring housing 10 as a fixed component, and the gear ring 3 is fixed inside the first multi-core photoelectric slip ring housing 10. When the flange 4 rotates, it will drive the gear ring 3 to rotate together. The rotation of the gear ring 3 will drive the electric slip ring structure and the smooth ring structure to rotate together. Due to the action of the planet carrier 9, the smooth ring structure will not generate a revolution around the electric slip ring structure.

[0054] The stator section includes a planetary carrier 9 connected to the second multi-core photoelectric slip ring housing 13, an electric slip ring stator structure 12 connected to the planetary carrier support 9, and a smooth ring stator structure 16 connected to the fixed tube connecting frame 9-2. The planetary carrier 9 is fixed to the second multi-core photoelectric slip ring housing 13 via planetary carrier fixing pins 11, and the planetary carrier 9 is connected to the electric slip ring stator structure 12 and the smooth ring stator structure 16. Figure 5 As shown, the planetary carrier 9 includes a planetary carrier support 9-1 and a fixed tube connecting frame 9-2. One end of the fixed tube connecting frame 9-2 is arranged around the planetary carrier support 9-1 at the same angle along the circumferential direction, and the other end is connected to the housing 13 of the second multi-core photoelectric slip ring via the planetary carrier fixing pin 11.

[0055] like Figure 3 and Figure 4 As shown, the electric slip ring stator structure 12 includes an electric slip ring stator 12-1, which is coaxially connected to an electric slip ring stator fixing tube 12-2. An electric slip ring stator limiting structure 15 is installed between the electric slip ring stator fixing tube 12-2 and the electric slip ring stator 12-1. The electric slip ring stator limiting structure 15 ensures that the electric slip ring stator 12-1 and the electric slip ring stator fixing tube 12-2 will not rotate axially or move longitudinally after they are assembled in place. The output wire is led out from the central tube.

[0056] The smooth ring stator structure 16 includes a smooth ring stator 16-1, which is coaxially connected to a smooth ring stator fixing tube 16-2. A smooth ring stator limiting structure 17 is installed between the smooth ring stator fixing tube 16-2 and the smooth ring stator 16-1. The smooth ring limiting structure 17 ensures that the smooth ring stator fixing tube 16-2 and the smooth ring stator 16-1 will not rotate axially or move longitudinally after they are assembled in place.

[0057] like Figure 1 As shown, the end of the electric slip ring stator 12-1 away from the electric slip ring mover 7 is provided with an electrical signal output terminal 12-3; the end of the smooth ring stator 16-1 away from the smooth ring mover 8 is provided with an optical signal output terminal 16-3; the end of the electric slip ring mover 7 near the electric slip ring stator gear 5 is provided with an electrical signal input terminal 7-1; and the end of the electric slip ring mover 8 near the smooth ring stator gear 6 is provided with an optical signal input terminal 8-1.

[0058] It should be noted that the center-to-center distance between the electric slip ring stator fixing tube 12-2 and the smooth ring stator fixing tube 16-2 is the same as the center-to-center distance between the electric slip ring mover 7 and the smooth ring mover 8, as well as the center-to-center distance between the electric slip ring stator 12-1 and the smooth ring stator 16-1. Similarly, the arrangement of the electric slip ring stator fixing tube 12-2 and the smooth ring stator fixing tube 16-2 corresponds to the arrangement between the electric slip ring mover 7 and the smooth ring mover 8, as well as the arrangement between the electric slip ring stator 12-1 and the smooth ring stator 16-1.

[0059] The smooth ring structure proposed in this invention can be one of a single-mode smooth ring and a multi-mode smooth ring, or a combination of a single-mode smooth ring and a multi-mode smooth ring.

[0060] The aforementioned multi-core optoelectronic slip ring can be assembled using the following method:

[0061] Assembly Step 1: Install the gear ring 3 inside the first multi-core photoelectric slip ring housing 10 to ensure that the gear ring 3 and the first multi-core photoelectric slip ring housing 10 are fixed in position, and that the gear ring 3 can rotate synchronously when the first multi-core photoelectric slip ring housing 10 rotates.

[0062] Assembly step 2: Connect the flange 4 to the housing 10 of the first multi-core photoelectric slip ring using connector 1. The positions of the two are fixed to ensure that the flange 4 rotates synchronously with the housing 10 of the first multi-core photoelectric slip ring when it rotates.

[0063] Assembly step 3: Install one end of the electric slip ring stator gear 5 in the electric slip ring structure coaxially with the connecting flange 4, while ensuring that the electric slip ring stator gear 5, flange 4 and gear ring structure 3 are coaxial;

[0064] Assembly Step 4: Install the smooth ring stator gear 6 between the electric slip ring stator gear 5 and the gear ring structure 3, ensuring that the angle between two adjacent smooth ring stator gears 6 is the same, and that the gears of the electric slip ring stator gear 5, the smooth ring stator gear 6, and the gear ring structure 3 reliably mesh, ensuring that when the smooth ring stator 16-1 and the electric slip ring stator 12-1 are fixed, the smooth ring moving gear 6 and the electric slip ring moving gear 5 can smoothly rotate when the flange 4 is rotated, while the smooth ring moving gear 6 will not generate a revolution relative to the electric slip ring moving gear 5;

[0065] Assembly Step 5: Connect the planetary carrier 9 with the stator fixing device to the smooth ring stator end and the electric slip ring stator end, ensuring that the electric slip ring stator fixing tube 5-2 is coaxially installed with the electric slip ring stator 12-1 and the smooth ring stator fixing tube 5-3 is coaxially installed with the smooth ring stator 16-1. At the same time, the electric slip ring stator limiting structure 15 and the smooth ring stator limiting structure 17 are installed in place to ensure that the planetary carrier 9 and the smooth ring stator end and the electric slip ring stator end will not have axial or circumferential displacement.

[0066] Assembly step 6: Connect the second multi-core photoelectric slip ring housing 13 to the first multi-core photoelectric slip ring housing 10 to ensure that the dynamic sealing structure 14 can play a waterproof and dustproof role, and that both can rotate smoothly. Connect the second multi-core photoelectric slip ring housing 13 with the planetary carrier fixing pin 11 to ensure that no axial displacement occurs.

[0067] In another embodiment of the present invention, the smooth ring structure in the planetary gear structure can be used as the sun gear of the planetary gear structure, and the electric slip ring structure can be used as the planetary gear in the planetary gear structure. Other components can be adjusted accordingly, and the assembly method can also be adjusted according to the corresponding steps, which will not be described in detail here.

[0068] In actual logging operations, the multi-core photoelectric slip ring proposed in this invention can be installed on the logging winch drum. The moving part of the multi-core photoelectric slip ring rotates with the logging winch drum. The tail end of the optical cable (photoelectric composite cable) is connected to the signal input end of the photoelectric slip ring, and the signal output end of the photoelectric slip ring is connected to the ground acquisition equipment. This allows for the reliable transmission of optical and electrical signals during the raising and lowering of the optical cable (photoelectric composite cable) in accordance with construction requirements, simultaneously enabling fiber optic logging and conventional electrical logging.

[0069] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-core photoelectric slip ring, characterized in that: The multi-core photoelectric slip ring includes an electric slip ring structure and a smooth ring structure, which together form a planetary gear structure; wherein the electric slip ring structure is the sun gear of the planetary gear structure, and the smooth ring structure is the planetary gear in the planetary gear structure. The multi-core photoelectric slip ring also includes a first multi-core photoelectric slip ring shell (10) and a second multi-core photoelectric slip ring shell (13) disposed outside the multi-core photoelectric slip ring; a dynamic sealing structure (14) is provided between the first multi-core photoelectric slip ring shell (10) and the second multi-core photoelectric slip ring shell (13); The first multi-core photoelectric slip ring housing (10) is provided with a moving part; the moving part includes a toothed ring (3) connected to the inner surface of the first multi-core photoelectric slip ring housing (10), a flange (4) and an electric slip ring moving part (7) coaxially arranged with the toothed ring (3), and a smooth ring moving part (8) arranged between the toothed ring (3) and the electric slip ring moving part structure. The second multi-core photoelectric slip ring housing (13) is provided with a stator section; the stator section includes a planetary carrier (9) connected to the second multi-core photoelectric slip ring housing (13), an electric slip ring stator structure (12) connected to the planetary carrier support section (9-1), and a smooth ring stator structure (16) connected to the fixed tube connecting frame (9-2).

2. The multi-core photoelectric slip ring according to claim 1, characterized in that: The flange (4) is connected to the first multi-core photoelectric slip ring housing (10) via a connector (1), and a gasket (2) is provided between the connector (1) and the first multi-core photoelectric slip ring housing (10). Multiple smooth ring movers (8) are provided, and the multiple smooth ring movers (8) are distributed around the electric sliding ring mover (7) with the same angle difference along the circumferential direction.

3. The multi-core photoelectric slip ring according to claim 1, characterized in that: The planetary carrier (9) includes a planetary carrier support (9-1) at the center of the planetary carrier (9) and a plurality of fixed tube connecting brackets (9-2) connected to the planetary carrier support (9-1). One end of each of the fixed tube connectors (9-2) is arranged at the same angle around the planetary support (9-1) along the circumferential direction, and the other end of each of the fixed tube connectors (9-2) is connected to the housing (13) of the second multi-core photoelectric slip ring via the planetary support pin (11).

4. A multi-core photoelectric slip ring according to claim 1 or 2, characterized in that: The electric slip ring mover (7) includes an electric slip ring mover housing, and an electric slip ring stator gear (5) is fixed on the outer surface of the electric slip ring mover housing. The electric slip ring stator gear (5) is coaxially arranged with the flange (4). The smooth ring mover (8) includes a smooth ring mover housing, and a plurality of smooth ring stator gears (6) are fixed on the outer surface of the smooth ring mover housing. The plurality of smooth ring stator gears (6) mesh with the electric slip ring stator gear (5) and the gear ring (3).

5. A multi-core photoelectric slip ring according to claim 1, characterized in that: The electric slip ring stator structure (12) includes an electric slip ring stator (12-1), the electric slip ring stator (12-1) is coaxially connected with an electric slip ring stator fixing tube (12-2), and an electric slip ring stator limiting structure (15) is installed between the electric slip ring stator fixing tube (12-2) and the electric slip ring stator (12-1). The smooth ring stator structure (16) includes a smooth ring stator (16-1), which is coaxially connected to a smooth ring stator fixing tube (16-2), and a smooth ring stator limiting structure (17) is installed between the smooth ring stator fixing tube (16-2) and the smooth ring stator (16-1).

6. A multi-core photoelectric slip ring according to claim 5, characterized in that: An electrical signal output terminal (12-3) is provided at the end of the electric slip ring stator (12-1) away from the electric slip ring mover (7); The smooth ring stator (16-1) is provided with an optical signal output terminal (16-3) at the end away from the smooth ring mover (8). An electrical signal input terminal (7-1) is provided at one end of the electric slip ring mover (7) near the electric slip ring stator gear (5); The smooth ring mover (8) has an optical signal input terminal (8-1) at one end near the smooth ring stator gear (6).

7. A multi-core photoelectric slip ring according to claim 5, characterized in that: The center-to-center distance between the electric slip ring stator fixing tube (12-2) and the smooth ring stator fixing tube (16-2) is the same as the center-to-center distance between the electric slip ring mover (7) and the smooth ring mover (8) and the center-to-center distance between the electric slip ring stator (12-1) and the smooth ring stator (16-1); The arrangement of the electric slip ring stator fixing tube (12-2) and the smooth ring stator fixing tube (16-2) corresponds to the arrangement of the electric slip ring mover (7) and the smooth ring mover (8) and the arrangement of the electric slip ring stator (12-1) and the smooth ring stator (16-1).

8. A multi-core photoelectric slip ring according to claim 1, characterized in that: The number of the smooth ring structures is greater than or equal to two; The smooth ring structure includes one of a single-mode smooth ring and a multi-mode smooth ring; The smooth ring structure includes both single-mode smooth rings and multi-mode smooth rings.

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