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

Abstract

The invention relates to the technical field of optical fiber communication, and discloses an optical fiber slip ring adapting to 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 invention, when the temperature changes and the internal liquid expands or shrinks, the pressure compensation shell correspondingly floats to realize 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 invention 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 temperatures and high pressure changes, which causes liquid expansion, resulting in an unbalanced internal and external pressure difference, and leads to the instability of the inner cavity.

[0003] For example, the patents with publication numbers CN118519227A, CN116104846A and CN115685453A all disclose that optical liquid is added to solve the problem of optical transmission. After the cavity is filled with liquid, the pressure applied from the outside can be squeezed to balance the pressure difference between the inside and outside. When the ambient temperature changes, the liquid will expand and the internal pressure will increase sharply. If there is no pressure compensation device or the compensation amount is insufficient, the product shell will be damaged or the oil will leak, resulting in product failure. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a fiber optic slip ring that is adaptable to a wide temperature and high pressure range, which solves the problem that although certain pressure compensation measures are taken in the existing dropped fiber optic slip ring, when the internal pressure changes drastically, oil leakage is prone to occur due to the limitation of the compensation pressure.

[0006] (II) Technical solution

[0007] 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, a flange shell fixedly arranged at one end of the inner shell, a rotor shaft movably arranged in the inner cavity of the flange shell through a dynamic sealing assembly, an intermediate seat fixedly connected to one end of the rotor shaft, a bearing seat fixedly arranged in the cavity formed by the inner shell and the flange shell, an active cavity arranged between the inner shell and the outer shell, a pressure compensation shell movably sleeved in the active cavity, the pressure compensation shell movably arranged between the inner shell and the outer shell, a liquid cavity connected to the end face of the inner shell and the inner cavity through a connecting hole, the liquid cavity is filled with pressure compensation liquid, when the temperature and pressure change, the pressure compensation liquid expands or contracts, the pressure compensation shell floats accordingly, to achieve compensation of internal and external pressures; a pair of ferrule assemblies for light transmission are arranged in the inner cavity of the inner shell, one of the ferrule assemblies is arranged in the bearing seat through a bearing rotation.

[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 is inserted into the plug and is communicatively connected with one of the core ferrule assemblies through the optical fiber, an intermediate seat is fixedly connected to the inner cavity of the rotor shaft, and one of the core 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 one of the insert core components.

[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 with 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 body.

[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 comprises a dynamic sealing ring, which is arranged between the flange shell and the rotor shaft, and a dynamic sealing retaining ring is fixedly arranged on the inner cavity of the flange shell outside the rotor shaft.

[0014] (III) Beneficial effects

[0015] The present invention has the following beneficial effects:

[0016] The optical fiber slip ring adaptable to wide temperature and high pressure can ensure the overall sealing performance of the rotor shaft when the core assembly is driven to rotate by the dynamic sealing component; the liquid cavity and the pressure compensation liquid are provided, so that 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 optical fiber slip ring; the active cavity and the pressure compensation shell are provided, so that when the pressure compensation liquid is compressed or expanded, the pressure compensation shell can be driven to move in the active cavity, and then the internal and external pressures are compensated, so that the entire optical fiber 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention in the AA direction;

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

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

[0021] Figure 5 It is a schematic diagram of the optical path transmission structure between the ferrule assemblies of the present invention.

[0022] In the figure: 1. flange shell; 2. inner shell; 3. rotor shaft; 4. plug; 5. bearing seat; 6. bearing; 7. mounting sleeve; 8. insert assembly; 9. outer shell; 10. movable 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0024] See also Figure 1 The present invention 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, a flange shell 1 fixedly arranged at one end of the inner shell 2, a rotor shaft 3 movably arranged in the inner cavity of the flange shell 1 through a dynamic sealing component, an intermediate seat 19 fixedly connected at one end of the rotor shaft 3, a bearing seat 5 fixedly arranged in the cavity formed by the inner shell 2 and the flange shell, an active cavity 10 arranged between the inner shell 2 and the outer shell, a pressure compensation shell 11 movably sleeved in the active cavity 10, the pressure compensation shell 11 movably arranged between the inner shell 2 and the outer shell 9, a liquid cavity 12 connected to the end surface of the inner shell 2 and the inner cavity through a connecting 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 arranged and rotatably arranged in the bearing seat 5 through a bearing 6.

[0025] The present invention, 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 optical fiber 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 optical fiber 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 is inserted into the plug 4 and is communicatively connected to a core plug assembly 8 through an optical fiber, and an intermediate seat 19 is fixedly connected to the inner cavity of the rotor shaft 3, and a core plug 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 seat 5, and the mounting sleeve 7 is arranged outside one end of a ferrule assembly 8. The mounting sleeve 7 can improve the stability of the ferrule assembly 8 after installation, and avoid affecting the stability of the installation of the ferrule assembly 8 when pressure compensation occurs after the entire slip ring is filled with pressure compensation liquid, thereby affecting the docking of the ferrule assembly 8, and further affecting the subsequent optical path 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 communicatively connected to a ferrule assembly 8 through an optical fiber, and 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 compensation housing 11, and the pressure compensation housing 11 and the sealing head 14. The plug 4 is located in the inner cavity of the rotor shaft 3 and a sealing gasket 16 is arranged between the plug 4 and the intermediate seat 19. A sealing gasket 16 is provided at the connection between the sealing head 14 and the inner housing 2. The sealing ring 15 can effectively ensure the sealing performance between the various housings, and at the same time improve the dynamic sealing performance of the pressure compensation housing 11, and cooperate with the sealing gasket 16 to ensure the overall sealing performance of the entire optical fiber slip ring.

[0030] Reference Figure 2 and 3As shown, in this embodiment, the dynamic sealing assembly includes a dynamic sealing ring 18, which is arranged between the flange housing 1 and the rotor shaft 3. The inner cavity of the flange housing is located outside the rotor shaft 3 and is fixedly provided with a dynamic sealing retainer ring 17. The dynamic sealing retainer ring 17 and the dynamic sealing ring 18 can effectively ensure the dynamic sealing performance between the rotor shaft 3 and the flange housing 1, and ensure the sealing performance inside the optical fiber slip ring during the rotation of the entire rotor shaft 3, thereby improving the stability of the entire optical fiber slip ring during long-term operation.

[0031] Reference Figure 5 As shown, in this embodiment, the ferrule assembly 8 uses a self-focusing microlens to fuse with the optical fiber and is encapsulated inside the ceramic ferrule, which itself has extremely high sealing and reliability. When the cavity is filled with liquid, because the light is output vertically from the self-focusing lens, it does not affect the normal transmission of the optical path. In this embodiment, a self-focusing lens is fused with the optical fiber and encapsulated inside the ceramic ferrule to form a ferrule assembly 8, and the optical path between the two ferrule assemblies 8 is output vertically from the self-focusing lens.

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

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

Claims

1. An optical fiber slip ring adapted to wide temperature and high pressure, comprising an inner shell and an outer shell coaxially fixedly installed, 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 connecting hole, and the liquid cavity is filled with pressure compensation liquid, and when the temperature and pressure change, the pressure compensation liquid either expands or contracts, and the pressure compensation shell floats accordingly, so as to realize the compensation of internal and external pressures; a pair of core assemblies for light transmission are arranged in the inner cavity of the inner shell, and one of the core 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 one of the insert core components.

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 with one end of the inner shell body.

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 to seal between the plug and the intermediate seat. The sealing gasket is provided at the connection between the sealing head and the inner shell.

6. An optical fiber slip ring adapted to wide temperature and high pressure according to any one of claims 1 to 5, characterized in that: The dynamic seal assembly comprises a dynamic seal 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 seal retaining ring.

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