Optical fiber slip ring suitable for wide temperature range and high pressure

Abstract

The utility model relates to the technical field of optical fiber communication, and discloses an optical fiber slip ring suitable for wide temperature and high pressure, a pressure compensation shell is movably sleeved in a movable cavity, and the pressure compensation shell is movably arranged between an inner shell and an outer shell. Liquid cavities are formed between the pressure compensation shell and the end face of the inner shell and between the pressure compensation shell and the inner cavity through communicating holes in a communicating mode, the liquid cavities are filled with pressure compensation liquid, and when the temperature and the pressure change, the pressure compensation liquid expands or contracts, the pressure compensation shell correspondingly floats, and compensation of the internal pressure and the external pressure is achieved; the inner cavity of the inner shell is provided with a pair of insertion core assemblies for light transmission, and one insertion core assembly is rotationally arranged in the bearing seat through a bearing. According to the utility model, when the temperature changes and the internal liquid expands or contracts, the pressure compensation shell correspondingly floats to realize the compensation of internal and external pressure, so that the whole product can adapt to different temperature ranges and different pressure ranges.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber communication, in particular to an optical fiber slip ring adaptable to wide temperature and high pressure. Background Art

[0002] The fiber optic slip rings currently used to withstand hydraulic pressure underwater only solve the problem of optical transmission, but do not solve the problem of adapting to different temperature and high pressure environments, which causes liquid expansion, resulting in an unbalanced internal and external pressure difference, and leading to internal cavity instability.

[0003] For example, patents with publication numbers CN118519227A, CN116104846A, and CN115685453A all address optical transmission issues by incorporating optical fluids. Once the cavity is filled with liquid, external pressure is applied to squeeze the liquid to equalize the internal and external pressure differential. However, when the ambient temperature changes, the liquid expands, causing the internal pressure to increase dramatically. Without a pressure compensation device or insufficient compensation, the product housing could be damaged or the fluid could leak, leading to product failure. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the utility model provides a fiber optic slip ring that can adapt to a wide temperature and high pressure range, solving the problem that when the existing fiber optic slip ring is dropped, although certain pressure compensation measures are taken, when the internal pressure changes sharply, oil leakage is prone to occur due to the limitation of the compensation pressure.

[0006] (2) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A fiber optic slip ring adaptable to wide temperature and high pressure, comprising an inner shell and an outer shell coaxially fixedly installed, one end of the inner shell being fixedly provided with a flange shell, the inner cavity of the flange shell being movably provided with a rotor shaft through a dynamic sealing assembly, one end of the rotor shaft being fixedly connected to an intermediate seat, a bearing seat being fixedly provided in the cavity formed by the inner shell and the flange shell, a movable cavity being provided between the inner shell and the outer shell, a pressure compensation shell being movably sleeved in the movable cavity, the pressure compensation shell being movably arranged between the inner shell and the outer shell, a liquid cavity being arranged between the pressure compensation shell and the end face of the inner shell and the inner cavity through a communicating hole, the liquid cavity being filled with pressure compensation liquid, when the temperature and pressure change, the pressure compensation liquid either expands or contracts, and the pressure compensation shell floats accordingly, thereby realizing compensation of internal and external pressures; a pair of ferrule assemblies for light transmission are arranged in the inner cavity of the inner shell, and one of the ferrule assemblies is rotatably arranged in the bearing seat through a bearing.

[0009] Preferably, a plug is fixedly provided at one end of the rotor shaft away from the flange housing, one end of the optical cable passes through the plug and is communicatively connected to one of the ferrule assemblies through the optical fiber, the inner cavity of the rotor shaft is fixedly connected to an intermediate seat, and one of the ferrule assemblies is fixedly provided at one end of the intermediate seat.

[0010] Preferably, a mounting sleeve is fixedly mounted on one end of the bearing seat, and the mounting sleeve cover is arranged on the outside of one end of the ferrule assembly.

[0011] Preferably, a sealing head is arranged in the inner cavity of the pressure compensation shell, an optical cable passes through the sealing head and is communicatively connected to one of the ferrule assemblies through an optical fiber, and one end of the sealing head is fixedly connected to one end of the inner shell.

[0012] Preferably, sealing rings are provided at the connection gaps between the inner shell and the flange shell, the inner shell and the outer shell, the outer shell and the pressure compensation shell, and the pressure compensation shell and the sealing head. The plug is located in the inner cavity of the rotor shaft and a sealing gasket is arranged to seal it with the intermediate seat. The sealing gasket is provided at the connection between the sealing head and the inner shell.

[0013] Preferably, the dynamic sealing assembly includes a dynamic sealing ring, which is arranged between the flange shell and the rotor shaft. The inner cavity of the flange shell is located outside the rotor shaft and is fixedly provided with a dynamic sealing retaining ring.

[0014] (3) Beneficial effects

[0015] The utility model has the following beneficial effects:

[0016] This optical fiber slip ring, which is adaptable to a wide temperature and high pressure range, can ensure the overall sealing performance of the ferrule assembly when the rotor shaft drives it to rotate, by means of a provided dynamic sealing assembly. By means of a provided liquid chamber and pressure compensation liquid, the pressure compensation liquid can be compressed or expanded to perform pressure compensation when the external temperature or pressure changes, thereby ensuring the normal function of the entire optical fiber slip ring. By means of a provided movable chamber and pressure compensation shell, the pressure compensation shell can be driven to move within the movable chamber when the pressure compensation liquid is compressed or expanded, thereby performing internal and external pressure compensation, thereby enabling the entire optical fiber slip ring assembly to have a wider temperature and high pressure pressure compensation capability, and is no longer limited to the pressure compensation range provided by the pressure compensation liquid itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the half-section structure of the utility model;

[0019] Figure 3This is a schematic diagram of the layout structure of the inner shell, outer shell and pressure compensation shell of the utility model;

[0020] Figure 4 This is a schematic diagram of the coupling structure of the ferrule assembly of the utility model;

[0021] Figure 5 This is a schematic diagram of the optical path transmission structure between the ferrule components of the utility model.

[0022] In the figure: 1. Flange outer shell; 2. Inner shell; 3. Rotor shaft; 4. Plug; 5. Bearing seat; 6. Bearing; 7. Mounting sleeve; 8. Insert assembly; 9. Outer shell; 10. Active cavity; 11. Pressure compensation shell; 12. Liquid cavity; 13. Connecting hole; 14. Sealing head; 15. Sealing ring; 16. Sealing gasket; 17. Dynamic sealing retaining ring; 18. Dynamic sealing ring; 19. Intermediate seat. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1 The utility model provides a technical solution: an optical fiber slip ring adaptable to wide temperature and high pressure, comprising an inner shell 2 and an outer shell 9 coaxially fixedly installed, one end of the inner shell 2 is fixedly provided with a flange shell 1, the inner cavity of the flange shell 1 is movably provided with a rotor shaft 3 through a dynamic sealing assembly, one end of the rotor shaft 3 is fixedly connected to an intermediate seat 19, a bearing seat 5 is fixedly provided in the cavity formed by the inner shell 2 and the flange shell, a movable cavity 10 is provided between the inner shell 2 and the outer shell, a pressure compensation shell 11 is movably sleeved in the movable cavity 10, the pressure compensation shell 11 is movably arranged between the inner shell 2 and the outer shell 9, a liquid cavity 12 is arranged between the pressure compensation shell 11 and the end surface of the inner shell 2 and the inner cavity through a communicating hole 13, the liquid cavity 12 is filled with pressure compensation liquid, when the temperature and pressure change, the pressure compensation liquid expands or contracts, and the pressure compensation shell floats accordingly to achieve compensation of internal and external pressures; a pair of ferrule assemblies 8 for light transmission are arranged in the inner cavity of the inner shell 2, and one ferrule assembly 8 is rotatably arranged in the bearing seat 5 through a bearing 6.

[0025] The utility model, through the provision of a dynamic sealing assembly, can be used to ensure the overall sealing performance of the rotor shaft 3 when driving the core assembly 8 to rotate; through the provision of a liquid chamber 12 and a pressure compensation liquid, when the external temperature or pressure changes, the pressure compensation liquid can be compressed or expanded to perform pressure compensation, so as to ensure the normal function of the entire fiber optic slip ring; through the provision of an active chamber 10 and a pressure compensation shell 11, when the pressure compensation liquid is compressed or expanded, it can drive the pressure compensation shell 11 to move in the active chamber 10, and then perform internal and external pressure compensation, so that the entire fiber optic slip ring assembly has a wider temperature and high pressure pressure compensation capability, and is no longer limited to the pressure compensation range brought by the pressure compensation liquid itself.

[0026] In this embodiment, a plug 4 is fixedly provided at one end of the rotor shaft 3 away from the flange housing 1, one end of the optical cable passes through the plug 4 and is communicated with a core assembly 8 through an optical fiber, and the inner cavity of the rotor shaft 3 is fixedly connected to an intermediate seat 19, and a core assembly 8 is fixedly provided at one end of the intermediate seat 19.

[0027] Reference Figure 2 As shown, in this embodiment, a mounting sleeve 7 is fixedly mounted on one end of the bearing housing 5. The mounting sleeve 7 covers the exterior of one end of a ferrule assembly 8. The mounting sleeve 7 improves the stability of the ferrule assembly 8 after installation, preventing pressure compensation after the entire slip ring is filled with pressure compensation fluid, which could affect the stability of the ferrule assembly 8 and thus the docking of the ferrule assembly 8, thereby affecting the subsequent optical transmission effect.

[0028] In this embodiment, a sealing head 14 is arranged in the inner cavity of the pressure compensation shell 11. The optical cable passes through the sealing head 14 and is connected to a core assembly 8 through an optical fiber. One end of the sealing head 14 is fixedly connected to one end of the inner shell 2.

[0029] Reference Figure 2 As shown, in this embodiment, sealing rings 15 are provided at the connection gaps between the inner housing 2 and the flange housing 1, the inner housing 2 and the outer housing 9, the outer housing 9 and the pressure-compensating housing 11, and the pressure-compensating housing 11 and the sealing head 14. A sealing gasket 16 is provided between the plug 4, which is located within the inner cavity of the rotor shaft 3 and is sealed against the intermediate seat 19. A sealing gasket 16 is also provided at the connection between the sealing head 14 and the inner housing 2. The provision of sealing rings 15 effectively ensures the sealing performance between the various housings, while also improving the dynamic sealing performance of the pressure-compensating housing 11. Together with the sealing gasket 16, they ensure the overall sealing performance of the entire fiber optic slip ring.

[0030] Reference Figure 2 and 3As shown, in this embodiment, the dynamic seal assembly includes a dynamic seal ring 18, which is disposed between the flange housing 1 and the rotor shaft 3. A dynamic seal retainer ring 17 is fixedly disposed within the flange housing cavity, located outside the rotor shaft 3. The provision of the dynamic seal retainer ring 17 and the dynamic seal ring 18 effectively ensures dynamic sealing performance between the rotor shaft 3 and the flange housing 1, ensuring sealing performance within the fiber optic slip ring throughout the rotation of the rotor shaft 3, thereby improving the stability of the entire fiber optic slip ring during long-term operation.

[0031] Reference Figure 5 As shown, in this embodiment, the ferrule assembly 8 utilizes a self-focusing microlens fused to the optical fiber and encapsulated within a ceramic ferrule, which inherently provides extremely high sealing and reliability. When the cavity is filled with liquid, light is output perpendicularly from the self-focusing lens, thus maintaining normal optical transmission. In this embodiment, the self-focusing lens is fused to the optical fiber and encapsulated within the ceramic ferrule to form the ferrule assembly 8. The light path between the two ferrule assemblies 8 is output perpendicularly from the self-focusing lens.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations. The phrase "includes an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fiber optic slip ring adapted to wide temperature and high pressure, comprising an inner shell and an outer shell coaxially fixedly mounted, characterized in that: A flange shell is fixedly provided at one end of the inner shell, and a rotor shaft is movably provided in the inner cavity of the flange shell through a dynamic sealing assembly, and an intermediate seat is fixedly connected to one end of the rotor shaft, and a bearing seat is fixedly provided in the cavity formed by the inner shell and the flange shell, and a movable cavity is provided between the inner shell and the outer shell, and a pressure compensation shell is movably sleeved in the movable cavity, and the pressure compensation shell is movably arranged between the inner shell and the outer shell, and a liquid cavity is arranged between the pressure compensation shell and the end face of the inner shell and the inner cavity through a communicating hole, and the liquid cavity is filled with pressure compensation liquid, and when the temperature and pressure change, the pressure compensation liquid expands or contracts, and the pressure compensation shell floats accordingly to realize compensation of internal and external pressures; a pair of ferrule assemblies for light transmission are arranged in the inner cavity of the inner shell, and one of the ferrule assemblies is arranged in the bearing seat through a bearing rotation.

2. The optical fiber slip ring adapted to wide temperature and high pressure according to claim 1, characterized in that: A plug is fixedly provided at one end of the rotor shaft away from the flange housing, one end of the optical cable passes through the plug and is communicatively connected to one of the ferrule assemblies through the optical fiber, an intermediate seat is fixedly connected to the inner cavity of the rotor shaft, and one of the ferrule assemblies is fixedly provided at one end of the intermediate seat.

3. The optical fiber slip ring adapted to wide temperature and high pressure according to claim 1, characterized in that: A mounting sleeve is fixedly mounted on one end of the bearing seat, and the mounting sleeve cover is arranged on the outside of one end of the ferrule assembly.

4. The optical fiber slip ring adapted to wide temperature and high pressure according to claim 2, characterized in that: The inner cavity of the pressure compensation shell is provided with a sealing head, the optical cable passes through the sealing head and is communicatively connected with one of the ferrule assemblies through the optical fiber, and one end of the sealing head is fixedly connected to one end of the inner shell.

5. The optical fiber slip ring adapted to wide temperature and high pressure according to claim 4, characterized in that: Sealing rings are provided at the connection gaps between the inner shell and the flange shell, the inner shell and the outer shell, the outer shell and the pressure compensation shell, and the pressure compensation shell and the sealing head. The plug is located in the inner cavity of the rotor shaft and a sealing gasket is arranged between it and the intermediate seat. The sealing gasket is provided at the connection between the sealing head and the inner shell.

6. The optical fiber slip ring adapted to a wide temperature range and high pressure according to any one of claims 1 to 5, characterized in that: The dynamic sealing assembly includes a dynamic sealing ring, which is arranged between the flange shell and the rotor shaft. The inner cavity of the flange shell is located outside the rotor shaft and is fixedly provided with a dynamic sealing retaining ring.

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