Opto-electric combined slip ring and wind turbine generator system having the same

Abstract

The application relates to a photoelectric combined slip ring and a wind turbine generator unit with the same, the photoelectric combined slip ring comprising a fixed base, an encoder arranged on the fixed base, a conductive slip ring, the conductive slip ring comprising a conductive stator part and a conductive rotor part arranged in the conductive stator part, the conductive stator part being fixedly connected with the fixed base, the conductive rotor part having a hollow shaft, and the conductive stator part being made of metal material, and an optical slip ring, the optical slip ring comprising oppositely arranged optical slip ring stator and rotor parts, the optical slip ring stator part being fixedly connected with the fixed base, the optical slip ring rotor part comprising a first connecting part and a second connecting part connected in sequence, the second connecting part being arranged in the hollow shaft, the second connecting part being connected with the conductive rotor part and rotating with the conductive rotor part, the encoder being eccentrically arranged with the conductive slip ring, and the first connecting part being in transmission connection with the encoder. According to the photoelectric combined slip ring, the eccentrically arranged encoder is provided for the optical slip ring, so that the optical slip ring can be installed with the central shaft of the conductive slip ring.

Description

Technical Field

[0001] This application relates to the field of photovoltaic combined slip ring technology, and more particularly to a photovoltaic combined slip ring and a wind turbine generator set having the same. Background Technology

[0002] Existing wind turbine generators typically use contact slip rings to transmit analog signals, including mechanical friction contact methods such as carbon brush contact, brush cluster contact, and brush needle contact. During operation, friction generates wear, damaging the original surface smoothness of the contact body, resulting in poor transmission performance and instability. These structures also have relatively short lifespans. Under impeller vibration conditions, brush filament warping and poor contact with the slip ring can easily occur, leading to increased contact resistance, signal distortion, or even signal loss. Furthermore, because the impeller operates in an atmosphere susceptible to electromagnetic interference, it is difficult to suppress electromagnetic interference, easily causing communication failures in wind turbine generators. Traditional contact slip ring communication failures account for 70%–80% of communication failures in wind turbine generators. While wireless radio frequency transmission is a non-contact transmission mode, its modules are prone to interference in confined spaces, affecting the accuracy of transmission results. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a photoelectric combined slip ring, in which an encoder is eccentrically set to make way for a smooth ring, allowing the smooth ring to be installed with the central axis of the conductive slip ring. This makes the transmission form non-contact, and the structure is reasonably designed, which can reduce the overall size of the product and make the signal transmission more stable, effectively extending the service life of the photoelectric combined slip ring.

[0004] The photoelectric combined slip ring according to the present invention includes: a fixed base; an encoder disposed on the fixed base; a conductive slip ring, the conductive slip ring including a conductive stator and a conductive rotor passing through the conductive stator, the conductive stator being fixedly connected to the fixed base, the conductive rotor having a hollow shaft, and the conductive stator being made of metal; and a smooth ring, the smooth ring including a smooth ring stator and a smooth ring rotor disposed opposite to each other, the smooth ring stator being fixedly connected to the fixed base, the smooth ring rotor including a first connecting part and a second connecting part connected in sequence, the second connecting part passing through the hollow shaft, the second connecting part being connected to the conductive rotor and rotating with the conductive rotor, the encoder being eccentrically disposed with the conductive slip ring, and the first connecting part being drively connected to the encoder through a transmission assembly.

[0005] According to the photoelectric combined slip ring of the present invention, the encoder and the conductive rotor are eccentrically arranged, and the smooth ring rotor and the conductive rotor are connected and rotate synchronously. Then, the encoder is connected to the smooth ring rotor for transmission, thereby realizing the transformation of the transmission method to non-contact while not affecting the encoder's reading and conversion of the rotational displacement of the conductive rotor. The structure is reasonably designed, which can reduce the overall size of the product and make the signal transmission more stable, effectively extending the service life of the photoelectric combined slip ring.

[0006] According to the photoelectric combined slip ring of the present invention, the transmission assembly includes a first drive gear, a second drive gear, and a synchronous belt. The first drive gear is sleeved on the first connecting part. The encoder includes an encoding stator part and an encoding rotor part. The encoding stator part is fixed on the fixed base. The second drive gear is sleeved on the encoding rotor part. The first drive gear and the second drive gear are connected by a synchronous belt.

[0007] Optionally, the first connecting part is provided with a first stop part, which is located at one end of the first connecting part near the smooth ring stator part, and the first stop part is fixedly connected to the first drive gear.

[0008] According to the photoelectric combined slip ring of the present invention, the central axis of the first connecting part and the central axis of the second connecting part are collinear.

[0009] According to the photoelectric combined slip ring of the present invention, the conductive stator part includes a stator housing, the stator housing defines a first mounting cavity and a second mounting cavity that communicate along a first direction, a fixed seat is disposed in the first mounting cavity, and the conductive rotor part is disposed in the second mounting cavity.

[0010] Optionally, along the first direction, the axis of the second mounting cavity is offset from the axis of the first mounting cavity in a direction away from the encoder.

[0011] Optionally, the conductive stator section comprises an aluminum alloy.

[0012] According to the photoelectric combined slip ring of the present invention, a stop block is provided on the fixed base, a limiting groove is provided on the stop block, the stator part of the smooth ring is fixed in the limiting groove, and an optical fiber channel is provided on the stop block, the optical fiber channel penetrating the bottom wall of the limiting groove.

[0013] Optionally, a first optical fiber connector is provided on the smooth ring stator, and the first transmission optical fiber is connected to the smooth ring stator; a second optical fiber connector is provided on the smooth ring rotor, and the second transmission optical fiber is connected to the smooth ring rotor.

[0014] The wind turbine generator set according to the present invention includes: a tower, on which a generator box and a blade assembly are provided, the generator box includes a photoelectric combined slip ring as described above, and the blade assembly includes a blade shaft and blades fixed on the blade shaft, a portion of the blade shaft being located inside the generator box and connected to the rotor portion of the conductive slip ring.

[0015] According to the wind turbine generator set of the present invention, the blades rotate while simultaneously driving the blade shaft to rotate synchronously. The blades capture wind energy and convert it into rotational energy of the blade shaft. The blade shaft is connected to the rotor section of a conductive slip ring, thereby converting the rotational energy into the kinetic energy of the generator housing. The generator housing then converts the kinetic energy into electrical energy through electromagnetic principles. The inclusion of the aforementioned photoelectric combined slip ring ensures stable signal transmission, strong anti-interference capabilities, and reduced susceptibility to extreme weather conditions. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of a photoelectric combined slip ring according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0020] Figure label:

[0021] Photoelectric combined slip ring 1,

[0022] Fixture 10,

[0023] Encoder 20, encoding stator section 21, encoding rotor section 22,

[0024] Conductive slip ring 30, conductive stator section 31, conductive brush 312, brush holder 314, support frame 316, stator housing 312, first mounting cavity 3122, second mounting cavity 3124, conductive rotor section 32, hollow shaft 321, copper ring 322, insulating sheet 323, first connecting bearing 324, second connecting bearing 326, retaining ring 327, sealing ring 328.

[0025] Smooth ring 40, smooth ring stator section 41, smooth ring rotor section 42, first connecting section 422, second connecting section 424, first stop section 425.

[0026] First drive gear 51, second drive gear 52, timing belt 53

[0027] Stop block 60. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] like Figure 1 and Figure 2 As shown, the photoelectric combined slip ring 1 according to an embodiment of the present invention includes: a fixed base 10, an encoder 20, a conductive slip ring 30, and a smooth ring 40. The conductive slip ring 30 is mainly used for transmitting electrical energy, and the smooth ring 40 is mainly used for transmitting communication signals.

[0030] Specifically, the encoder 20 is mounted on the fixed base 10; the conductive slip ring 30 includes a conductive stator 31 and a conductive rotor 32 passing through the conductive stator 31. The conductive stator 31 is fixedly connected to the fixed base 10, and the conductive rotor 32 has a hollow shaft 321. The conductive stator 31 is made of metal. The smooth ring 40 includes a smooth ring stator 41 and a smooth ring rotor 42 arranged opposite to each other. The smooth ring stator 41 is fixedly connected to the fixed base 10. The smooth ring rotor 42 includes a first connecting part 422 and a second connecting part 424 connected in sequence. The second connecting part 424 passes through the hollow shaft 321 and is connected to the conductive rotor 32 and rotates with the conductive rotor 32. The encoder 20 and the conductive slip ring 30 are eccentrically arranged. The first connecting part 422 and the encoder 20 are connected by a transmission assembly. The transmission ratio between the first connecting part 422 and the encoder 20 is 1:1.

[0031] In some embodiments, the first connecting part 422 is connected to the encoder 20 via a worm gear drive; in some embodiments, the first connecting part 422 is connected to the encoder 20 via a synchronous belt pulley assembly; and in some embodiments, the first connecting part 422 is connected to the encoder 20 via a gear assembly. This application does not impose any limitations.

[0032] In detail, the conductive rotor 32 is in contact with the conductive stator 31 for electrical conduction. The rotation of the conductive rotor 32 drives the second connecting part 424 to rotate synchronously. The rotation of the second connecting part 424 drives the first connecting part 422 to rotate synchronously. The rotation of the first connecting part 422, through its transmission connection with the encoder 20, drives the encoder 20 to measure the rotational displacement of the conductive rotor 32, converting the rotational displacement of the conductive rotor into an electrical signal. When the photoelectric combined slip ring 1 is applied in a wind turbine generator set, the encoder 20 can control the angular displacement of the wind turbine generator set. Therefore, the photoelectric combined slip ring 1 can change the transmission of electrical signals to optical signals, becoming a non-contact transmission. Power is transmitted through the conductive slip ring 30, and high-frequency signals are transmitted through the smooth ring 40. Weak detection signals susceptible to electromagnetic interference are transmitted via optical fiber, while high-power strong current signals are transmitted via the conductive slip ring 30. This avoids the possibility of weak signals being susceptible to electromagnetic interference, ensuring stable signal transmission and effectively extending the service life of the photoelectric combined slip ring 1. It achieves small size, low cost, and the ability to transmit multiple signals simultaneously.

[0033] like Figure 1 As shown, the specific structure of the conductive slip ring 30 is as follows: the conductive rotor part 32 is disposed in the conductive stator part 31 through the first connecting bearing 324. The conductive stator part 31 contacts the conductive rotor part 32 and conducts electricity. The conductive stator part 31 includes a stator housing 312. The stator housing 312 is provided with a conductive brush 312, a brush holder 314, a support frame 316, etc. The brush holder 314 is fixed to the outer wall of the hollow shaft 321 through a brush machine support rod. The conductive brush 312 is fixed on the brush holder 314. The conductive rotor part 32 includes a copper ring 322 disposed on the outer wall of the hollow shaft 321 and an insulating sheet 323, etc. The conductive brush 312 contacts the copper ring 322 to conduct electricity. The hollow shaft 321 is connected to the stator housing 312 through the first connecting bearings 324 at both ends.

[0034] like Figure 1 As shown, in some embodiments, a second connecting bearing 326 is fitted onto the end of the hollow shaft 321 away from the smooth ring 40. The second connecting bearing 326 is located between the two first connecting bearings 324. A limiting platform is also provided on the hollow shaft 321, located at the end of the second connecting bearing 326 near the smooth ring 40 and abutting against the second connecting bearing 326. A retaining ring 327 is also fitted onto the hollow shaft 321, abutting against the end of the second connecting bearing 326 away from the smooth ring 40. A sealing ring 328 is also fitted onto the end of the hollow shaft 321 away from the smooth ring 40, located on the side of the first connecting bearing 324 away from the smooth ring 40.

[0035] Furthermore, the smooth ring 40 includes single-channel and multi-channel versions. For the single-channel smooth ring 40, fiber optic collimators are installed in both the smooth ring stator 41 and the smooth ring rotor 42. The rotational transmission of the optical signal is achieved through the coupling of the two fiber optic collimators. For the multi-channel smooth ring 40, the smooth ring rotor 42 includes an input channel, a rotor mechanism, a Dove prism, and an adjustment mechanism. The smooth ring stator 41 includes an output channel. The optical signal enters the smooth ring rotor 42 through the input channel, and after coupling, it enters the Dove prism. It is transmitted in the Dove prism and, through reflection by the prism, is emitted at the corresponding position. The emitted beam is transmitted outside the smooth ring 40 through the output channel, thereby ensuring the integrity of the optical signal transmission.

[0036] According to an embodiment of the photoelectric combined slip ring 1 of the present invention, the encoder 20 and the conductive rotor 32 are eccentrically arranged, and the smooth ring rotor 42 is connected to the conductive rotor 32 for synchronous rotation. The encoder 20 is then connected to the smooth ring rotor 42 via a transmission connection, thereby achieving a non-contact transmission method without affecting the encoder 20's reading and conversion of the rotational displacement of the conductive rotor 32. The structure is rationally designed, reducing the overall size of the product and making signal transmission more stable, effectively extending the service life of the photoelectric combined slip ring 1. The stator housing 312 is also provided with a mounting groove, and the sealing ring 328 is embedded in the mounting groove.

[0037] like Figure 2 As shown, in the photoelectric combined slip ring 1 according to an embodiment of the present invention, the transmission assembly includes a first drive gear 51, a second drive gear 52, and a synchronous belt 53. The first drive gear 51 is sleeved on the first connecting part 422. The encoder 20 includes an encoding stator part 21 and an encoding rotor part 22. The encoding stator part 21 is fixed on the fixed base 10. The second drive gear 52 is sleeved on the encoding rotor part 22. The first drive gear 51 and the second drive gear 52 are connected by the synchronous belt 53. The rotation of the conductive rotor part 32 drives the second connecting part 424 to rotate synchronously. The rotation of the second connecting part 424 drives the first connecting part 422 to rotate synchronously. The first connecting part 422 rotates, driving the first drive gear 51 to rotate. The rotation of the first drive gear 51 drives the second drive gear 52 to rotate via the synchronous belt 53. The rotation of the second drive gear 52 drives the encoder rotor part 22 to rotate, thereby enabling the encoder 20 to measure the rotational displacement of the conductive rotor part 32. The transmission ratio of the first drive gear 51 to the second drive gear 52 is 1:1, so that the rotational displacement of the conductive rotor part 32 can be transmitted to the encoder 20 through the first drive gear 51, the second drive gear 52 and the synchronous belt 53, thereby allowing the encoder 20 to make way for the installation of the smooth ring 40.

[0038] In some other embodiments, the first drive gear 51 and the second drive gear 52 are directly meshed, or the first drive gear 51 and the second drive gear 52 can be meshed through a transmission gear. This application does not impose any restrictions.

[0039] In some embodiments, the encoding rotor section 22 includes a first shaft segment and a second shaft segment connected in sequence. The first shaft segment is located inside the encoding stator section 21, and the second shaft segment is located outside the encoding stator section 21. A second drive gear 52 is sleeved on the second shaft segment.

[0040] like Figure 2 As shown, in some embodiments, a first stop 425 is provided on the first connecting portion 422. The first stop 425 is located at one end of the first connecting portion 422 near the smooth ring stator portion 41, and is fixedly connected to the first drive gear 51. This limits the first drive gear 51 by the first stop 425, preventing it from slipping off the first connecting portion 422. In some embodiments, the first stop 425 is integrally formed with the first connecting portion 422; in other embodiments, the first stop 425 and the first connecting portion 422 are detachably connected. This application does not impose any limitations.

[0041] In some embodiments, the central axis of the first connecting portion 422 and the central axis of the second connecting portion 424 are not collinear, and the central axis of the first connecting portion 422 is offset relative to the central axis of the second connecting portion 424 in a direction closer to the encoder 20. The central axes of the first connecting portion 422 and the second connecting portion 424 extend along a first direction, thereby enabling the first drive gear 51 and the second drive gear 52 to mesh directly without increasing their size. The first connecting portion 422 and the second connecting portion 424 together define a receiving channel, within which an input channel, a rotor mechanism, a Dove prism, and an adjustment mechanism are provided.

[0042] like Figure 2 As shown, in the optoelectronic combined slip ring 1 according to an embodiment of the present invention, a stop block 60 is provided on the fixed base 10, and a limiting groove is provided on the stop block 60. The smooth ring stator part 41 is fixed in the limiting groove, and an optical fiber channel is provided on the stop block 60, which penetrates the bottom wall of the limiting groove. The limiting groove and the smooth ring stator part 41 are fitted with a clearance fit, which can better ensure the coaxiality of the smooth ring 40 and the conductive slip ring 30, and improve the reliability and performance of the optoelectronic combined slip ring 1.

[0043] In some embodiments, a first optical fiber connector is provided on the smooth ring stator 41, a first transmission optical fiber is connected to the smooth ring stator 41, and the first transmission optical fiber passes through the optical fiber channel to connect with other components. A second optical fiber connector is provided on the smooth ring rotor 42, and a second transmission optical fiber is connected to the smooth ring rotor 42.

[0044] According to the photoelectric combined slip ring 1 of the present invention, the central axis of the first connecting part 422 and the central axis of the second connecting part 424 are collinear, which simplifies the structural configuration of the smooth ring rotor part 42.

[0045] like Figure 1 As shown, in the photoelectric combined slip ring 1 according to an embodiment of the present invention, the conductive stator part 31 includes a stator housing 312, which defines a first mounting cavity 3122 and a second mounting cavity 3124 communicating along a first direction. The fixing seat 10 is disposed in the first mounting cavity 3122, the conductive rotor part 32 is disposed in the second mounting cavity 3124, the encoder 20 is also disposed in the first mounting cavity 3122, the smooth ring stator part 41 is disposed in the first mounting cavity 3122, a portion of the smooth ring rotor part 42 is located in the first mounting cavity 3122, and the second connecting part 424 of the smooth ring rotor part 42 is located in the second mounting cavity 3124. By utilizing the anti-interference characteristics of the metal sealed cavity, the stator housing 312 provides multiple shielding protection for sensitive transmission signals, providing stable transmission conditions for the signal loop in situations where large currents and sensitive signals need to be transmitted simultaneously.

[0046] like Figure 1 As shown, in some embodiments, along the first direction, the axis of the second mounting cavity 3124 is offset from the axis of the first mounting cavity 3122 in a direction away from the encoder 20. Since the encoder 20 and the rotor portion of the conductive slip ring 30 are eccentrically positioned, by setting the axis of the second mounting cavity 3124 to be offset from the axis of the first mounting cavity 3122 in a direction away from the encoder 20, the structure can be made more compact, the size of the photoelectric combined slip ring 1 structure can be reduced, and its applicability can be increased.

[0047] In some embodiments, the conductive stator 31 is made of aluminum alloy and has a sandblasted surface, which enables the overall weight of the optoelectronic combination slip ring 1 to be reduced while achieving the shielding of interference signals by using metal.

[0048] According to an embodiment of the present invention, a wind turbine generator set includes: a tower, on which a generator box and a blade assembly are provided. The generator box includes a photoelectric combined slip ring 1 as described above. The blade assembly includes a blade shaft and blades fixed on the blade shaft. A portion of the blade shaft is located inside the generator box and connected to the rotor portion of the conductive slip ring 30.

[0049] According to an embodiment of the wind turbine generator set, the blades rotate while simultaneously driving the blade shaft to rotate synchronously. The blades capture wind energy and convert it into rotational energy of the blade shaft. The blade shaft is connected to the rotor section of the conductive slip ring 30, thereby converting the rotational energy into the kinetic energy of the generator housing. The generator housing then converts the kinetic energy into electrical energy through electromagnetic principles. The inclusion of the aforementioned photoelectric combined slip ring 1 ensures stable signal transmission, strong anti-interference capabilities, and reduced susceptibility to extreme weather conditions.

[0050] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A photoelectric combined slip ring, characterized in that, include: Fixed base; The encoder is mounted on the fixed base; A conductive slip ring, comprising a conductive stator and a conductive rotor passing through the conductive stator, wherein the conductive stator is fixedly connected to the fixed base, the conductive rotor has a hollow shaft, and the conductive stator is made of metal. The smooth ring includes a smooth ring stator and a smooth ring rotor disposed opposite to each other. The smooth ring stator is fixedly connected to the fixed base. The smooth ring rotor includes a first connecting part and a second connecting part connected in sequence. The second connecting part passes through the hollow shaft and is connected to the conductive rotor and rotates with the conductive rotor. The encoder is eccentrically disposed with the conductive slip ring. The first connecting part is connected to the encoder through a transmission assembly. The transmission assembly includes a first drive gear and a second drive gear. The first drive gear is sleeved on the first connecting part. The encoder includes an encoding stator and an encoding rotor. The encoding stator is fixed on a fixed base. The second drive gear is sleeved on the encoding rotor. The first drive gear and the second drive gear mesh directly. The central axis of the first connecting part and the central axis of the second connecting part are not collinear. The central axis of the first connecting part is offset relative to the central axis of the second connecting part in a direction closer to the encoder. The central axes of the first connecting part and the central axes of the second connecting part extend along a first direction.

2. The photoelectric combined slip ring according to claim 1, characterized in that, The first connecting part is provided with a first stop part, which is located at one end of the first connecting part near the smooth ring stator part, and the first stop part is fixedly connected to the first drive gear.

3. The photoelectric combined slip ring according to claim 1, characterized in that, The conductive stator includes a stator housing, which defines a first mounting cavity and a second mounting cavity that communicate along a first direction. The fixed seat is disposed in the first mounting cavity, and the conductive rotor is disposed in the second mounting cavity.

4. The photoelectric combined slip ring according to claim 3, characterized in that, Along the first direction, the axis of the second mounting cavity deviates from the axis of the first mounting cavity in a direction away from the encoder.

5. The photoelectric combined slip ring according to claim 4, characterized in that, The conductive stator section comprises an aluminum alloy.

6. The photoelectric combined slip ring according to claim 1, characterized in that, The fixed base is provided with a stop block, the stop block is provided with a limiting groove, the smooth ring stator is fixed in the limiting groove, the stop block is provided with an optical fiber channel, and the optical fiber channel penetrates the bottom wall of the limiting groove.

7. The photoelectric combined slip ring according to claim 6, characterized in that, The smooth ring stator is provided with a first optical fiber connector, and the first transmission optical fiber is connected to the smooth ring stator. The smooth ring rotor is provided with a second optical fiber connector, and the second transmission optical fiber is connected to the smooth ring rotor.

8. A wind turbine generator set, characterized in that, include: A tower, on which a generator housing and a blade assembly are provided, wherein the generator housing includes a photoelectric combined slip ring as described in any one of claims 1-7, and the blade assembly includes a blade shaft and blades fixed on the blade shaft, wherein a portion of the blade shaft is located inside the generator housing and connected to the rotor portion of the conductive slip ring.

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