Plastic optical fiber slip ring module and variable pitch slip ring

Abstract

The application discloses a plastic optical fiber slip ring module and a variable-pitch slip ring. The plastic optical fiber slip ring module comprises an optical stator structure and an optical rotor structure rotatably arranged in the optical stator structure. The optical stator structure comprises an optical stator frame, a guide mounting rod arranged on the optical stator frame, and a first transmission assembly assembled on the guide mounting rod. The optical rotor structure comprises an optical rotor shaft rotatably arranged on the optical stator frame and a second transmission assembly sleeved on the optical rotor shaft. The first transmission assembly and the second transmission assembly both have plastic optical fibers. The first transmission assembly and the second transmission assembly are arranged in opposite intervals to be capable of transmitting optical signals in the process of relative rotation. The transmission end face of the plastic optical fiber is larger than that of a quartz optical fiber, and the plastic optical fiber has stronger deformation resistance. The plastic optical fiber can buffer rotational vibration and slight deviation, avoid optical fiber damage, and ensure stable transmission of optical signals.

Description

Technical Field

[0001] This invention relates to the field of slip ring technology, and in particular to a plastic fiber optic slip ring module and a pitch slip ring. Background Technology

[0002] Pitch slip rings are the core rotating connection components of wind turbine generators, installed between the nacelle and the rotor hub, used to stably transmit power and communication signals during 360° continuous rotation. Communication signals can be transmitted using contact brushes with signal rings, or high-speed communication signals can be transmitted using fiber optic slip rings.

[0003] Existing fiber optic slip rings mostly use quartz glass optical fibers to achieve high-speed communication signal transmission. However, quartz glass optical fibers are inherently brittle and have poor resistance to contamination, while the interior of a wind turbine nacelle is subjected to harsh operating conditions such as dust accumulation, moisture erosion, mechanical vibration, and alternating temperature differences. Dust easily adheres to the fiber optic interface, causing problems such as optical path obstruction and optical coupling misalignment, resulting in optical signal attenuation and transmission anomalies.

[0004] As a result, traditional quartz glass fiber optic slip rings have poor environmental adaptability and a high failure rate during long-term operation, making it difficult to meet the requirements of long-term stable, continuous and reliable communication transmission for wind power pitch control systems. Summary of the Invention

[0005] The purpose of this invention is to propose a plastic optical fiber slip ring module and a pitch slip ring, which aims to solve the problems of poor environmental adaptability and high failure rate in long-term operation of existing quartz glass optical fiber slip rings.

[0006] In a first aspect, the present invention provides a plastic optical fiber slip ring module, the plastic optical fiber slip ring module including an optical stator structure and an optical rotor structure rotatably disposed within the optical stator structure, the optical stator structure including an optical stator frame, a guide mounting rod disposed on the optical stator frame, and a first transmission component assembled on the guide mounting rod, the optical rotor structure including an optical rotor shaft rotatably disposed on the optical stator frame, and a second transmission component fitted on the optical rotor shaft; Both the first transmission component and the second transmission component have plastic optical fibers, and the first transmission component and the second transmission component are arranged at a relative interval to transmit optical signals during relative rotation.

[0007] In one embodiment, a plurality of first transmission components and a plurality of second transmission components are provided, and each of the plurality of first transmission components is configured in a one-to-one correspondence to form a plurality of transmission modules; Several of the transmission modules are arranged along the axial direction of the optical rotor shaft.

[0008] In one embodiment, the first transmission component includes a first support shell and a first transmission ring disposed within the first support shell, and the second transmission component includes a second support shell and a second transmission ring disposed within the second support shell, wherein the first transmission ring and the second transmission ring are disposed at a distance from each other.

[0009] In one embodiment, a first annular groove is provided inside the first support shell, the opening of the first annular groove faces a first direction, the first transmission ring is disposed inside the first annular groove, and can transmit optical signals in the first direction or receive optical signals from a second direction. The second support shell is provided with a second annular groove, the opening of the second annular groove faces the second direction, the second transmission ring is disposed in the second annular groove, and can receive optical signals from the first direction or transmit optical signals toward the second direction; Wherein, the first direction is opposite to the second direction.

[0010] In one embodiment, the first transmission component further includes a first transmission optical fiber, and the second transmission component further includes a second transmission optical fiber; Both the optical stator frame and the first support shell are provided with first wiring holes. The first support shell is also provided with a first through hole. The first transmission optical fiber passes through the first wiring hole and the first through hole and extends into the first ring groove so as to be able to connect with the first transmission ring, thereby transmitting optical signals to the first transmission ring or receiving optical signals from the first transmission ring. The optical rotor shaft is provided with an axially extending second wiring hole, and the second support shell is also provided with a second through hole. The second transmission optical fiber passes through the second wiring hole and the second through hole and extends into the second ring groove so as to be able to connect with the second transmission ring, thereby receiving optical signals from the first transmission ring or transmitting optical signals to the first transmission ring.

[0011] In one embodiment, multiple guide mounting rods are provided and are distributed circumferentially around the optical rotor shaft. The first support shell is provided with guide mounting holes, and multiple guide mounting holes are provided circumferentially around the first support shell and are provided in correspondence with each of the guide mounting rods. The second support shell has an axially extending axial mounting hole, and the hole wall of the axial mounting hole is configured to guide and cooperate with the optical rotor shaft.

[0012] In one embodiment, the optical stator frame includes an optical stator cylinder and a first connecting plate and a second connecting plate disposed opposite to each other at both ends of the optical stator cylinder; The guide mounting rod is clamped between the first connecting plate and the second connecting plate; One end of the guide mounting rod is provided with a threaded connection part, and the other end is provided with a threaded mounting hole; The plastic fiber optic slip ring module further includes a first connector. The first connecting plate has a first connecting hole, and the second connecting plate has a second connecting hole. The threaded connection part is threaded to the wall of the second connecting hole. The first connector passes through the first connecting hole and is threaded to the wall of the threaded mounting hole to install the guide mounting rod between the first connecting plate and the second connecting plate.

[0013] In one embodiment, the guide mounting hole extends along the axial direction of the optical rotor shaft and has a notch formed in the radial direction.

[0014] In one embodiment, the first support shell includes a first connecting portion and a first mounting portion. The first connecting portion has a guide mounting hole, and the first mounting portion has a first annular groove. The first mounting portions of two adjacent first support shells abut against each other to fix a plurality of first support shells onto the optical stator frame. The second support shell includes a second connecting portion and a second mounting portion. The second connecting portion has an axial mounting hole, and the second mounting portion has a second annular groove. The second mounting portions of two adjacent second support shells abut against each other to fix a plurality of second support shells onto the optical rotor shaft; and / or, The first mounting portions of two adjacent first support shells enclose each other to form an annular groove, and the second mounting portions of each second support shell are inserted into the annular groove, with a rotational clearance between them and the groove wall.

[0015] Secondly, the present invention also provides a pitch slip ring, the pitch slip ring comprising a conductive slip ring module and the plastic fiber slip ring module described in any of the above embodiments; The conductive slip ring module includes a conductive stator structure and a conductive rotor structure rotatably connected to the conductive stator structure; the optical stator structure is disposed on the conductive stator structure, and the optical rotor structure is disposed on the conductive rotor structure and can rotate with the conductive rotor structure.

[0016] The embodiments of the present invention have the following beneficial effects: The plastic optical fiber slip ring module and pitch slip ring of the present invention, since both the first transmission component and the second transmission component have plastic optical fibers, and the first transmission component and the second transmission component are arranged at relative intervals, can transmit optical signals during relative rotation. The transmission end face of the plastic optical fiber is larger than that of the quartz optical fiber, and the plastic optical fiber has stronger resistance to deformation, which can buffer rotational vibration and slight offset, avoid optical fiber damage, and ensure stable transmission of optical signals.

[0017] In addition, since the first transmission component is assembled on the guide mounting rod and the second transmission component is mounted on the optical rotor shaft, the first and second transmission components can be stably installed respectively, providing a firm positioning support for both, effectively avoiding loosening, offset or shaking of the transmission components during relative rotation, and greatly improving the relative rotational stability of the optical rotor structure relative to the optical stator structure. Attached Figure Description

[0018] 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] in: Figure 1 This is a schematic diagram of a pitch slip ring in one embodiment.

[0020] Figure 2 for Figure 1 The side view of the pitch slip ring is shown.

[0021] Figure 3 for Figure 2 Sectional view of AA.

[0022] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0023] Figure 5 This is an enlarged cross-sectional view of the first and second transmission components in one embodiment.

[0024] Figure 6 for Figure 1 A schematic diagram of the plastic fiber optic slip ring module in the pitch slip ring shown.

[0025] Figure 7 for Figure 6 The exploded view of the plastic fiber optic slip ring module shown.

[0026] Figure 8 for Figure 6The diagram shows the second connecting plate in the plastic fiber optic slip ring module.

[0027] Figure 9 for Figure 6 The diagram shows the assembly of multiple first transmission components and multiple second transmission components in the plastic fiber optic slip ring module.

[0028] Figure 10 for Figure 6 The diagram shows the arrangement of the second transmission component in the plastic fiber optic slip ring module.

[0029] Figure 11 for Figure 6 The diagram shows the assembly of a first transmission component and a second transmission component in a plastic fiber optic slip ring module.

[0030] Figure 12 for Figure 11 Another angle view of the first and second transmission components shown.

[0031] Figure 13 for Figure 11 The exploded view of the first and second transmission components is shown.

[0032] Figure 14 for Figure 11 The diagram shows the second support shell in the second transmission component.

[0033] Figure 15 for Figure 6 A schematic diagram of the optical rotor shaft in the plastic optical fiber slip ring module shown.

[0034] Figure 16 for Figure 15 The diagram shows another angle of the optical rotor shaft.

[0035] Figure 17 for Figure 6 A schematic diagram of the guide mounting rod in the plastic fiber optic slip ring module shown.

[0036] Figure 18 for Figure 6 The diagram shows the first connecting plate in the plastic fiber optic slip ring module.

[0037] Reference numerals: 100, Optical stator structure; 110. Optical stator frame; 111. Optical stator cylinder; 112. First connecting plate; 1121. First connecting hole; 1122. Annular fixing part; 113. Second connecting plate; 1131. Second connecting hole; 1132. First receiving cavity; 1133. Second receiving cavity; 1134. Communicating cavity; 120. Guide mounting rod; 121. Threaded connection part; 122. Threaded mounting hole; 130. First transmission component; 131. First support shell; 1311. First annular groove; 1312. Guide mounting hole; 1313. First connecting part; 1314. First mounting part; 132. First transmission ring; 1321. First light-transmitting surface; 1322. First reflective surface; 133. Annular groove; 134. Rotation clearance; 140. First wiring hole; 150. First threading hole; 200. Optical rotor structure; 210. Optical rotor shaft; 211. First positioning structure; 212. Slot; 213. First shaft hole; 214. Shaft end groove; 220. Second transmission component; 221. Second support shell; 2211. Second annular groove; 2212. Axial mounting hole; 2213. Second connecting part; 2214. Second mounting part; 2215. Second positioning structure; 222, Second transmission ring; 2221, Second light-transmitting surface; 2222, Second reflective surface; 230. Second wiring hole; 240. Retaining ring; 250. Support shaft; 260. Second threading hole; 310, First bearing; 320, Second bearing; 330, Third bearing; 340, Coupling; 400. Encoder; 410. Rotating component; 420. Sensing component; 500. Conductive stator structure; 510. Frame body; 520. End cap; 530. Clamping groove; 600. Conductive rotor structure. Detailed Implementation

[0038] 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, and 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.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of the stated features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0041] This invention discloses a plastic fiber optic slip ring module, which is mainly used to transmit communication signals on the pitch slip ring and is suitable for complex working conditions such as long-term continuous rotation, high and low temperature alternation, and mechanical vibration of wind turbine pitch systems.

[0042] Please see Figures 1 to 18 One embodiment of the plastic fiber optic slip ring module includes an optical stator structure 100 and an optical rotor structure 200 rotatably disposed within the optical stator structure 100. The optical stator structure 100 includes an optical stator frame 110, a guide mounting rod 120 disposed on the optical stator frame 110, and a first transmission component 130 assembled on the guide mounting rod 120. The optical rotor structure 200 includes an optical rotor shaft 210 rotatably disposed on the optical stator frame 110, and a second transmission component 220 fitted on the optical rotor shaft 210.

[0043] In this embodiment, both the first transmission component 130 and the second transmission component 220 have plastic optical fibers. The first transmission component 130 and the second transmission component 220 are arranged at a distance from each other so that they can transmit optical signals during relative rotation.

[0044] It is understandable that, since both the first transmission component 130 and the second transmission component 220 have plastic optical fibers, and the first transmission component 130 and the second transmission component 220 are arranged at relative intervals, they can transmit optical signals during relative rotation. The transmission end face of the plastic optical fiber is larger than that of the quartz optical fiber, and the plastic optical fiber also has stronger resistance to deformation, which can buffer rotational vibration and slight offset, avoid fiber breakage, and ensure stable transmission of optical signals.

[0045] In addition, since the first transmission component 130 is assembled on the guide mounting rod 120 and the second transmission component 220 is fitted on the optical rotor shaft 210, the first transmission component 130 and the second transmission component 220 can be stably installed respectively, providing a firm positioning support for both, effectively avoiding loosening, offset or shaking of the transmission components during relative rotation, and greatly improving the relative rotational stability of the optical rotor structure 200 relative to the optical stator structure 100.

[0046] Specifically, the relative spacing between the first transmission component 130 and the second transmission component 220 can be selected as 0.2mm-1mm. On the one hand, a non-contact gap coupling transmission mode is adopted to prevent friction and scratching loss of the plastic optical fiber end face. On the other hand, a reasonable gap range is also limited to ensure smooth rotor rotation while avoiding excessive gap that would cause optical signal divergence and attenuation.

[0047] In one embodiment, a plurality of first transmission components 130 and a plurality of second transmission components 220 are provided, and are provided in one-to-one correspondence with the plurality of first transmission components 130 to form a plurality of transmission modules; the plurality of transmission modules are arranged along the axial direction of the optical rotor shaft 210.

[0048] Understandably, each transmission module can achieve one communication channel. By setting up several transmission modules, multiple communication signals can be transmitted synchronously and in parallel, meeting the multi-channel signal interaction requirements of the wind power pitch system. Furthermore, the number of transmission modules can be flexibly increased or decreased according to the equipment's communication needs.

[0049] In one embodiment, the first transmission component 130 includes a first support shell 131 and a first transmission ring 132 disposed within the first support shell 131, and the second transmission component 220 includes a second support shell 221 and a second transmission ring 222 disposed within the second support shell 221, with the first transmission ring 132 and the second transmission ring 222 being disposed at a distance from each other.

[0050] It is understandable that the arrangement of the first support shell 131 and the second support shell 221 can provide closed protection and rigid fixation for the first transmission ring 132 and the second transmission ring 222, reducing the erosion of the optical path between the first transmission ring 132 and the second transmission ring 222 by external dust, oil, and water vapor.

[0051] Specifically, the first transmission ring 132 and the second transmission ring 222 have a larger annular optical path transmission area compared to quartz optical fiber. The inner diameter Ra of the first transmission ring 132 and the second transmission ring 222 is 3mm-20mm, and the outer diameter Rb is 10mm-30mm, wherein the difference between the outer diameter Rb and the inner diameter Ra is 5mm-15mm. Of course, in other embodiments, the inner diameter Ra of the first transmission ring 132 and the second transmission ring 222 can be less than 3mm or greater than 20mm, and the outer diameter Rb of the first transmission ring 132 and the second transmission ring 222 can be less than 10mm or greater than 30mm, but it is necessary to ensure that the outer diameter Rb is greater than the inner diameter Ra, and that the radial transmission area of ​​the first transmission ring 132 and the second transmission ring 222 is large enough to meet the signal transmission requirements.

[0052] In this embodiment, the plastic optical fiber slip ring module is a plastic optical fiber (POF) slip ring.

[0053] In one embodiment, a first annular groove 1311 is provided inside the first support shell 131, with the opening of the first annular groove 1311 facing a first direction. A first transmission ring 132 is disposed inside the first annular groove 1311 and is capable of transmitting optical signals in the first direction or receiving optical signals from a second direction. A second annular groove 2211 is provided inside the second support shell 221, with the opening of the second annular groove 2211 facing a second direction. A second transmission ring 222 is disposed inside the second annular groove 2211 and is capable of receiving optical signals from the first direction or transmitting optical signals in the second direction. The first direction is opposite to the second direction.

[0054] Understandably, on the one hand, the ring groove embedded installation structure can surround and limit the transmission ring to prevent it from falling off or deflecting during long-term use; on the other hand, the opposing opening layout of the first ring groove 1311 and the second ring groove 2211 realizes the optical path is directly coupled, the structure is simple and the optical path is highly directional, and it can realize bidirectional optical signal transmission and reception.

[0055] In one embodiment, the first transmission component 130 further includes a first transmission optical fiber, and the second transmission component 220 further includes a second transmission optical fiber; both the optical stator frame 110 and the first support shell 131 are provided with first wiring holes 140, and the first support shell 131 is also provided with a first through hole 150. The first transmission optical fiber passes through the first wiring hole 140 and the first through hole 150, and extends into the first annular groove 1311, so as to be able to connect with the first transmission ring 132, thereby transmitting optical signals to the first transmission ring 132, or receiving signals from the first transmission ring 132. The optical signal of the second transmission optical fiber is provided on the optical rotor shaft 210 with an axially extending second wiring hole 230 and the second support shell 221 with a second through hole 260. The second transmission optical fiber passes through the second wiring hole 230 and the second through hole 260 and extends into the second ring groove 2211 so as to connect with the second transmission ring 222, thereby receiving the optical signal from the first transmission ring 132 or transmitting the optical signal to the first transmission ring 132. The wiring holes and through holes are used to lay out the transmission optical fiber, and the wiring is neat and orderly, which can prevent the line from tangling and interfering.

[0056] In one embodiment, the first transmission ring 132 includes a first light-transmitting surface 1321 and a plurality of first reflective surfaces 1322. The first light-transmitting surface 1321 is disposed on the surface of the first transmission ring 132 on the side opposite to the second transmission ring 222, and the plurality of first reflective surfaces 1322 are disposed on other surfaces of the first transmission ring 132 other than the first light-transmitting surface 1321, so that the optical signal is confined within the first transmission ring 132 by the plurality of first reflective surfaces 1322 and can be input or output from the first light-transmitting surface 1321.

[0057] Furthermore, the second transmission ring 222 includes a second light-transmitting surface 2221 and a plurality of second reflective surfaces 2222. The second light-transmitting surface 2221 is disposed on the surface of the second transmission ring 222 on the side opposite to the first transmission ring 132, and the plurality of second reflective surfaces 2222 are disposed on other surfaces of the second transmission ring 222 other than the second reflective surfaces 2222, so that the optical signal is confined within the second transmission ring 222 by the plurality of second reflective surfaces 2222 and can be input or output from the second light-transmitting surface 2221.

[0058] It is understandable that designing the transmission ring as a closed optical transmission cavity formed by multiple reflective surfaces and using the principle of total internal reflection to constrain the optical path can effectively reduce lateral scattering and leakage loss of optical signals, thereby improving the transmission efficiency and coupling strength of optical signals and enhancing the stability of signal transmission.

[0059] In one embodiment, a plurality of first reflective surfaces 1322 and a plurality of second reflective surfaces 2222 are each provided with a reflective layer; the reflective layer is a reflective film attached to the first transmission ring 132 or the second transmission ring 222. With this configuration, the high reflectivity reflective layer can significantly improve the light reflection efficiency of the reflective surfaces, further reduce internal light loss in the optical path, and enhance light transmission capability. Of course, in other embodiments, the reflective layer is a reflective coating or reflective film formed on the first transmission ring 132 or the second transmission ring 222.

[0060] In one embodiment, multiple guide mounting rods 120 are provided and distributed circumferentially on the optical rotor shaft 210. A guide mounting hole 1312 is provided on the first support shell 131. Multiple guide mounting holes 1312 are provided circumferentially on the first support shell 131 and are provided one-to-one with each guide mounting rod 120. By such arrangement, the circumferential stability and load-bearing strength of the overall assembly of the first transmission component 130 can be improved, unilateral deformation due to force can be prevented, and the circumferential rotation of the first support shell 131 can be restricted.

[0061] In this embodiment, the second support shell 221 is provided with an axially extending axial mounting hole 2212. The hole wall of the axial mounting hole 2212 is configured to guide and cooperate with the optical rotor shaft 210 so as to install the second support shell 221 on the optical rotor shaft 210.

[0062] In one embodiment, the optical stator frame 110 includes an optical stator cylinder 111 and a first connecting plate 112 and a second connecting plate 113 disposed opposite to each other at both ends of the optical stator cylinder 111; wherein, a guide mounting rod 120 is clamped and disposed between the first connecting plate 112 and the second connecting plate 113; one end of the guide mounting rod 120 is provided with a threaded connection portion 121 and the other end is provided with a threaded mounting hole 122; the plastic fiber slip ring module also includes a first connector, the first connecting plate 112 is provided with a first connecting hole 1121, the second connecting plate 113 is provided with a second connecting hole 1131, the threaded connection portion 121 is threadedly connected to the hole wall of the second connecting hole 1131, the first connector passes through the first connecting hole 1121 and is threadedly connected to the hole wall of the threaded mounting hole 122, so as to install the guide mounting rod 120 between the first connecting plate 112 and the second connecting plate 113.

[0063] The guide mounting rod 120 uses a two-way locking method with threads at both ends, making the connection tight and not easy to loosen. Compared with a single-sided fixing structure, it has better installation stability.

[0064] In one embodiment, the guide mounting hole 1312 extends along the axial direction of the optical rotor shaft 210 and has a notch formed in the radial direction. This design reduces the radial dimension of the first support shell 131, thereby facilitating the miniaturization of the plastic fiber slip ring module. Simultaneously, when the opening size of the notch is sufficiently large, it also facilitates radial alignment and assembly between the first support shell 131 and the guide rod component, effectively improving assembly convenience and installation adaptability.

[0065] Understandably, the aforementioned miniaturized design also facilitates the spatial assembly of the plastic fiber optic slip ring module on the pitch slip ring, and makes the spatial arrangement of the plastic fiber optic slip ring module on the pitch slip ring easier.

[0066] In one embodiment, the first support shell 131 includes a first connecting portion 1313 and a first mounting portion 1314. The first connecting portion 1313 has a guide mounting hole 1312, and the first mounting portion 1314 has a first annular groove 1311. The first mounting portions 1314 of two adjacent first support shells 131 abut against each other to fix a plurality of first support shells 131 on the optical stator frame 110. The second support shell 221 includes a second connecting portion 2213 and a second mounting portion 2214. The second connecting portion 2213 has an axial mounting hole 2212, and the second mounting portion 2214 has a second annular groove 2211. The second mounting portions 2214 of two adjacent second support shells 221 abut against each other to fix a plurality of second support shells 221 on the optical rotor shaft 210.

[0067] With this configuration, axial positioning and fixing can be achieved between two adjacent first support shells 131 and between two adjacent second support shells 221 without additional locking accessories, simplifying the assembly structure and increasing space utilization.

[0068] In one embodiment, the first mounting portions 1314 of two adjacent first support shells 131 enclose each other to form an annular groove 133. The second mounting portions 2214 of each second support shell 221 are inserted into the annular groove 133, and there is a rotational gap 134 between them and the groove wall of the annular groove 133. By setting the rotational gap 134, the smooth relative rotation of the first support shell 131 and the second support shell 221 can be ensured.

[0069] In one embodiment, the optical rotor shaft 210 is provided with an axially extending first positioning structure 211, and the second support shell 221 is provided with a second positioning structure 2215 that guides and cooperates with the first positioning structure 211; wherein, one of the first positioning structure 211 and the second positioning structure 2215 is a groove or a protrusion, and the other is a protrusion or a groove.

[0070] This design prevents relative circumferential slippage and misalignment between the second support shell 221 and the optical rotor shaft 210, ensuring the positioning accuracy of the second support shell 221 on the optical rotor shaft 210. At the same time, the axially extended positioning structure also ensures ease of assembly.

[0071] In one embodiment, the plastic fiber optic slip ring module further includes a retaining ring 240, a second connector, and a support shaft 250. The support shaft 250 has a third connecting hole. One end of the optical rotor shaft 210 has a slot 212, and the other end has a first shaft hole 213. The retaining ring 240 is engaged with the groove wall of the slot 212. The second connector passes through the third connecting hole and is threadedly connected to the first shaft hole 213 to fix the support shaft 250 to the end of the optical rotor shaft 210. Several second support shells 221 are sandwiched between the retaining ring 240 and the support shaft 250. With this arrangement, the retaining ring 240 and the support shaft 250 are used at both axial ends of the optical rotor shaft 210 to achieve axial fixing and limiting of several second transmission components 220.

[0072] Specifically, the plastic fiber optic slip ring module also includes a retaining ring, and the retaining ring 240 is positioned in the retaining groove 212 by the retaining ring so as to axially abut against the second transmission component 220 and limit the axial position of the second transmission component 220.

[0073] In one embodiment, the plastic fiber optic slip ring module further includes a first bearing 310 and a second bearing 320. The first bearing 310 is disposed on one end of the optical rotor shaft 210 near the slot 212 and between the optical rotor shaft 210 and the optical stator frame 110. The second bearing 320 is disposed between the support shaft 250 and the optical stator frame 110. The front-to-back arrangement of the first bearing 310 and the second bearing 320 can reduce rotational friction resistance; at the same time, it can improve the overall coaxiality of the optical rotor shaft 210, reduce rotational sway, and ensure long-term stable coupling of the optical path.

[0074] In one embodiment, the plastic fiber optic slip ring module further includes an encoder 400, which includes a rotating component 410 disposed on the optical rotor shaft 210 and a sensing component 420 disposed on the optical stator frame 110.

[0075] It is understandable that since the second transmission component 220 is mounted on the optical rotor shaft 210, it does not occupy the axial space of the optical rotor shaft 210, so the encoder 400 can be configured to include a rotating component 410 disposed on the optical rotor shaft 210 and a sensing component 420 disposed on the optical stator frame 110, thereby reducing the radial area occupied by the fiber optic slip ring and facilitating the miniaturization of the fiber optic slip ring.

[0076] In one embodiment, the rotating component 410 is a magnet, and the sensing component 420 is a magnetic sensor. The magnetic sensor is positioned opposite to the magnet to obtain the rotation parameters of the optical rotor shaft 210 by sensing the rotation state of the magnet. By incorporating the magnetic sensor encoder 400, this non-contact detection device exhibits no mechanical wear, a long service life, and a simple and easy-to-assemble structure.

[0077] Specifically, the magnet can be a permanent magnet and can be configured to be radially magnetized. The magnetic sensor can be a Hall sensor or a magnetoresistive sensor.

[0078] Furthermore, in this embodiment, one end of the optical rotor shaft 210 is provided with a shaft end groove 214, and at least part of the magnet is inserted into the shaft end groove 214 to ensure that the magnet can fit tightly with the shaft end groove 214 after being inserted, so as to avoid the magnet from becoming loose or shifting during rotation. Of course, in other embodiments, the rotating component 410 may also be a code disk, and the sensing component 420 may also be a photosensitive element. The code disk is coaxially fixed on the optical rotor shaft 210, and the photosensitive element is set corresponding to the code disk so as to obtain the rotation parameters of the optical rotor shaft 210 by sensing the rotation state of the code disk. The optical encoder 400 is used to measure high accuracy and fast response speed.

[0079] Specifically, the code disk can be an absolute code disk, with evenly distributed light-transmitting holes and light-blocking areas on its surface. The light-transmitting holes and light-blocking areas are arranged alternately. The resolution of the code disk can be flexibly selected according to actual needs. The photosensitive elements include light-emitting diodes and photodetectors, which are respectively set on both sides of the code disk.

[0080] This invention also discloses a pitch slip ring, which includes a conductive slip ring module and a plastic fiber optic slip ring module of any of the above embodiments; wherein, the conductive slip ring module includes a conductive stator structure 500 and a conductive rotor structure 600 rotatably connected to the conductive stator structure 500; an optical stator structure 100 is disposed on the conductive stator structure 500, and an optical rotor structure 200 is disposed on the conductive rotor structure 600 and can rotate with the conductive rotor structure 600.

[0081] Understandably, due to the plastic fiber slip ring module, the transmission end face of the plastic fiber is larger than that of the quartz fiber, and the plastic fiber also has a stronger resistance to deformation. It can buffer rotational vibration and slight offset, avoid fiber breakage, and ensure stable transmission of optical signals. Applying the above-mentioned plastic fiber slip ring module to the pitch slip ring can guarantee the stability and reliability of the optical signal transmission of the pitch slip ring.

[0082] In one embodiment, the conductive stator structure 500 includes a frame body 510 and an end cap 520; the optical stator frame 110 includes an optical stator cylinder 111, and a first connecting plate 112 and a second connecting plate 113 disposed opposite to each other at both ends of the optical stator cylinder 111. The first connecting plate 112 has an annular fixing part 1122 disposed circumferentially. The end cap 520 is detachably connected to the outside of the frame body 510 and surrounds the frame body 510 to form a clamping groove 530 for clamping and fixing the annular fixing part 1122, so as to fix the optical stator frame 110 on the conductive stator structure 500. The detachable clamping and fixing method facilitates the quick assembly and disassembly of the optical stator frame 110 as a whole and independent maintenance.

[0083] In one embodiment, the second connecting disk 113 is provided with a first accommodating cavity 1132 and a second accommodating cavity 1133, and a communicating cavity 1134 connecting the first accommodating cavity 1132 and the second accommodating cavity 1133; the plastic optical fiber slip ring module also includes a first bearing 310 and a second bearing 320, and the conductive slip ring module also includes a third bearing 330 and a coupling 340. The first bearing 310 is disposed between the first connecting disk 112 and the optical rotor shaft 210, the second bearing 320 is located in the first accommodating cavity 1132 and is disposed between the second connecting disk 113 and the optical rotor shaft 210, and the third bearing 330 is located in the second accommodating cavity 1133 and is disposed between the second connecting disk 113 and the conductive rotor structure 600; wherein, the coupling 340 is disposed in the communicating cavity 1134 and is used to connect the optical rotor shaft 210 and the conductive rotor structure 600.

[0084] By setting up the aforementioned multi-bearing distributed load-bearing structure, the overall rotational stability can be improved. The coupling 340 can compensate for the coaxiality error in the installation of the optical rotor shaft 210 and the conductive rotor structure 600.

[0085] In one embodiment, an intelligent module is disposed on the conductive stator structure 500 and is used to detect the motion state of the conductive rotor structure 600 relative to the conductive stator structure 500. The motion state can be motion parameters such as contact impedance, dynamic impedance, rotational speed, and number of revolutions. When abnormal data is detected, the abnormal data can be analyzed and the fault point can be located, so as to maintain the wind power pitch photovoltaic intelligent slip ring in a timely manner. Since potential faults can be detected and dealt with quickly in a timely manner, the situation of long-term wind turbine shutdown caused by the expansion of faults is avoided, which significantly improves the power production efficiency.

[0086] In one embodiment, the intelligent module includes a processor and an impedance measurement module. The impedance measurement module includes an impedance measurement circuit and a sampling component. The sampling component includes a sampling ring disposed on the conductive rotor structure 600 and a sampling brush disposed on the conductive stator structure 500 and sliding in contact with the sampling ring. The impedance measurement circuit is used to collect a first motion signal generated by the sliding contact between the sampling ring and the sampling brush, and transmits the first motion signal to the processor. The processor processes the first motion signal to obtain the motion state of the contact impedance and dynamic impedance. By monitoring these impedance changes in real time, potential faults of the pitch slip ring, such as poor contact, can be detected in advance, enabling preventive maintenance.

[0087] In one embodiment, the smart module further includes several sensors, all of which are electrically connected to the processor. The sensors include at least one or more of a speed sensor, a counting sensor, a light intensity sensor, an acceleration sensor, and a temperature and humidity sensor, to detect the motion state of the conductive rotor structure 600 relative to the conductive stator structure 500.

[0088] Understandably, the speed sensor measures the rotational speed of the conductive rotor, allowing operators to monitor its operation in real time, promptly detect speed anomalies, and prevent malfunctions caused by uncontrolled rotation. The counting sensor records the number of rotations, providing crucial data for assessing the slip ring's lifespan and wear level, facilitating the rational planning of maintenance schedules. The light intensity sensor detects the presence of arcing within the slip ring and assesses operational stability. The acceleration sensor senses changes in acceleration during the 60° rotation of the conductive rotor structure, providing early warnings of potential vibration or impact issues. The temperature and humidity sensor monitors the ambient temperature and humidity of the slip ring's environment in real time, preventing degradation of electrical performance due to environmental factors.

[0089] In one embodiment, the intelligent module further includes a wireless communication module, a wired communication module, and a storage module; these modules are electrically connected to the processor. This configuration allows the wireless communication module to overcome spatial limitations in data transmission, enabling real-time, long-distance transmission of slip ring motion data to a monitoring center or mobile terminal. Staff can access slip ring information remotely from anywhere, facilitating remote monitoring and diagnostics, significantly improving operational flexibility and response speed. The wired communication module provides a stable, high-speed data transmission channel, ensuring accuracy and reliability in complex electromagnetic environments and meeting the demands of applications requiring real-time data processing. The storage module can permanently store historical slip ring operating data, providing rich data support for fault analysis, performance evaluation, and trend prediction.

[0090] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A plastic optical fiber slip ring module, characterized in that, The plastic fiber optic slip ring module includes an optical stator structure and an optical rotor structure rotatably disposed within the optical stator structure. The optical stator structure includes an optical stator frame, a guide mounting rod disposed on the optical stator frame, and a first transmission component assembled on the guide mounting rod. The optical rotor structure includes an optical rotor shaft rotatably disposed on the optical stator frame and a second transmission component fitted on the optical rotor shaft. Both the first transmission component and the second transmission component have plastic optical fibers, and the first transmission component and the second transmission component are arranged at a relative interval to transmit optical signals during relative rotation.

2. The plastic optical fiber slip ring module according to claim 1, characterized in that, The first transmission component is provided in several units, the second transmission component is provided in several units, and each unit is provided in a one-to-one correspondence with the first transmission component to form several transmission modules; Several of the transmission modules are arranged along the axial direction of the optical rotor shaft.

3. The plastic optical fiber slip ring module according to claim 2, characterized in that, The first transmission component includes a first support shell and a first transmission ring disposed within the first support shell. The second transmission component includes a second support shell and a second transmission ring disposed within the second support shell. The first transmission ring and the second transmission ring are disposed at a distance from each other.

4. The plastic optical fiber slip ring module according to claim 3, characterized in that, The first support shell is provided with a first annular groove, the opening of the first annular groove faces a first direction, the first transmission ring is disposed in the first annular groove, and can transmit optical signals in the first direction or receive optical signals from a second direction. The second support shell is provided with a second annular groove, the opening of the second annular groove faces the second direction, the second transmission ring is disposed in the second annular groove, and can receive optical signals from the first direction or transmit optical signals toward the second direction; Wherein, the first direction is opposite to the second direction.

5. The plastic optical fiber slip ring module according to claim 4, characterized in that, The first transmission component further includes a first transmission optical fiber, and the second transmission component further includes a second transmission optical fiber; Both the optical stator frame and the first support shell are provided with first wiring holes. The first support shell is also provided with a first through hole. The first transmission optical fiber passes through the first wiring hole and the first through hole and extends into the first ring groove so as to be able to connect with the first transmission ring, thereby transmitting optical signals to the first transmission ring or receiving optical signals from the first transmission ring. The optical rotor shaft is provided with an axially extending second wiring hole, and the second support shell is also provided with a second through hole. The second transmission optical fiber passes through the second wiring hole and the second through hole and extends into the second ring groove so as to be able to connect with the second transmission ring, thereby receiving optical signals from the first transmission ring or transmitting optical signals to the first transmission ring.

6. The plastic optical fiber slip ring module according to claim 3, characterized in that, Multiple guide mounting rods are provided and are distributed circumferentially around the optical rotor shaft. The first support shell is provided with guide mounting holes, and multiple guide mounting holes are provided circumferentially around the first support shell, each corresponding to one of the guide mounting rods. The second support shell has an axially extending axial mounting hole, and the hole wall of the axial mounting hole is configured to guide and cooperate with the optical rotor shaft.

7. The plastic optical fiber slip ring module according to claim 6, characterized in that, The optical stator frame includes an optical stator cylinder and a first connecting plate and a second connecting plate disposed opposite to each other at both ends of the optical stator cylinder; The guide mounting rod is clamped between the first connecting plate and the second connecting plate; One end of the guide mounting rod is provided with a threaded connection part, and the other end is provided with a threaded mounting hole; The plastic fiber optic slip ring module further includes a first connector. The first connecting plate has a first connecting hole, and the second connecting plate has a second connecting hole. The threaded connection part is threaded to the wall of the second connecting hole. The first connector passes through the first connecting hole and is threaded to the wall of the threaded mounting hole to install the guide mounting rod between the first connecting plate and the second connecting plate.

8. The plastic optical fiber slip ring module according to claim 7, characterized in that, The guide mounting hole extends along the axial direction of the optical rotor shaft and has a notch formed in the radial direction.

9. The plastic optical fiber slip ring module according to claim 8, characterized in that, The first support shell includes a first connecting portion and a first mounting portion. The first connecting portion has a guide mounting hole, and the first mounting portion has a first annular groove. The first mounting portions of two adjacent first support shells abut against each other to fix a plurality of first support shells onto the optical stator frame. The second support shell includes a second connecting portion and a second mounting portion. The second connecting portion has an axial mounting hole, and the second mounting portion has a second annular groove. The second mounting portions of two adjacent second support shells abut against each other to fix a plurality of second support shells onto the optical rotor shaft; and / or, The first mounting portions of two adjacent first support shells enclose each other to form an annular groove, and the second mounting portions of each second support shell are inserted into the annular groove, with a rotational clearance between them and the groove wall.

10. A pitch slip ring, characterized in that, The pitch slip ring includes a conductive slip ring module and a plastic fiber optic slip ring module as described in any one of claims 1 to 9; The conductive slip ring module includes a conductive stator structure and a conductive rotor structure rotatably connected to the conductive stator structure; the optical stator structure is disposed on the conductive stator structure, and the optical rotor structure is disposed on the conductive rotor structure and can rotate with the conductive rotor structure.

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