Current collector device

Abstract

The present invention discloses a current collector device, which is used to connect with a generator of a wind turbine. The current collector device includes a base, a first conductive component and a rotating mechanism. The base is provided with an installation surface, and a hollow shaft protrudes from the installation surface. The first conductive component is arranged on the installation surface and is arranged around the hollow shaft. The rotating mechanism is rotatably connected to one end of the hollow shaft away from the installation surface. A diversion terminal is arranged on one side of the rotating mechanism facing the first conductive component. The diversion terminal is in rotational contact with the first conductive component and is electrically connected. The rotating mechanism is used to connect the generator, and the generator is electrically connected to the diversion terminal. The purpose of the present invention is to replace the special cable twisting and forced yaw zeroing devices in the prior art through this current collector device, which can effectively reduce the material, design and commissioning costs and reduce power generation losses.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly to a current collector device. Background Art

[0002] To maximize power generation efficiency, a wind turbine needs to continuously perform yaw actions to align with the wind direction. Therefore, the nacelle of the wind turbine rotates coaxially relative to the tower barrel. When the nacelle rotates by a certain angle, the power cable connecting the generator twists itself or gets entangled with other power cables, causing wear on the outer insulation layer of the power cable and local poor heat dissipation. Prolonged wear reduces the torsional strength of the cable and makes it prone to breakage, not only resulting in the shutdown of the unit but also easily causing fire accidents.

[0003] In related technologies, a forced yaw return-to-zero device and a special wear-resistant insulated twisted cable are usually adopted. However, when using a forced yaw return-to-zero device, an additional forced return device needs to be designed for the wind turbine, increasing the material and design costs. Moreover, additional debugging is required before the wind turbine is put into operation to calibrate the yaw zero degree and the forced yaw angle, increasing the man-hour cost. Also, during the period when the wind turbine yaws to a certain angle and then returns to zero by forced yaw, the wind turbine cannot generate electricity normally, resulting in power generation losses. For the special wear-resistant insulated twisted cable, it can only relieve wear for a short time, cannot solve the problem of long-term wear, and its cost is also higher than that of ordinary cables. Summary of the Invention

[0004] The main purpose of the present invention is to provide a current collector device, aiming to replace the existing special twisted cable and forced yaw return-to-zero device with this current collector device, which can effectively reduce the material, design, and debugging costs and reduce power generation losses.

[0005] To achieve the above object, the present invention provides a current collector device, which is applied to a wind power generation unit and connected to a generator. The current collector device includes:

[0006] A base, the base is provided with an installation surface, and a hollow shaft protrudes from the installation surface;

[0007] A first conductive component, the first conductive component is arranged on the installation surface and is arranged around the hollow shaft; and

[0008] A rotating mechanism, the rotating mechanism is rotatably connected to one end of the hollow shaft away from the installation surface. A diversion terminal is provided on a side of the rotating mechanism facing the first conductive component. The diversion terminal is in rotational contact with the first conductive component and is electrically connected. The rotating mechanism is used to connect the generator, and the generator is electrically connected to the diversion terminal.

[0009] In one embodiment, the first conductive component includes:

[0010] A support member, which is provided on the mounting surface and arranged around the hollow shaft;

[0011] A carbon brush assembly, which is slidably connected to the support member; and

[0012] An elastic member, which is sleeved on the support member. One end of the elastic member is elastically abutted against the mounting surface, and the other end of the elastic member is elastically connected to the carbon brush assembly, so that the carbon brush assembly is abutted against the current-carrying terminal and electrically conducts.

[0013] In one embodiment, the support member includes a plurality of support shafts provided on the mounting surface. The plurality of support shafts are arranged at intervals around the hollow shaft. Each support shaft is sleeved with the elastic member, and the carbon brush assembly is slidably connected to one end of the plurality of support shafts facing away from the mounting surface.

[0014] In one embodiment, the carbon brush assembly includes a plurality of carbon brush rings. Each carbon brush ring is slidably connected to at least one of the support shafts. The plurality of carbon brush rings are arranged around the hollow shaft and are sequentially arranged at intervals in the radial direction of the hollow shaft. A first heat dissipation gap is formed between two adjacent carbon brush rings.

[0015] In one embodiment, each carbon brush ring includes a plurality of carbon brush segments. Each carbon brush segment is arc-shaped and is slidably connected to at least one of the support shafts. The plurality of carbon brush segments of each carbon brush ring are arranged around the hollow shaft and are located on the same circumference. A second heat dissipation gap is formed at intervals between two adjacent carbon brush segments of each carbon brush ring. The first heat dissipation gap is communicated with the second heat dissipation gap.

[0016] In one embodiment, the rotating mechanism includes:

[0017] An insulating disc, on one side of which facing the first conductive assembly is provided with a mounting groove, and the bottom wall of the mounting groove is rotatably connected to the hollow shaft;

[0018] A second conductive assembly, which includes a plurality of current-carrying terminals provided in the mounting groove. Each current-carrying terminal is arranged around the hollow shaft and is arranged in a ring corresponding to the carbon brush assembly. The plurality of current-carrying terminals are sequentially arranged at intervals in the radial direction of the hollow shaft, and an insulating gap is provided between two adjacent current-carrying terminals; and

[0019] A slip ring hanger, one end of which is connected to the side of the insulating disc facing away from the mounting groove, and the other end of the slip ring hanger is used for connecting the nacelle of a wind turbine generator.

[0020] In one embodiment, the second conductive component further includes a plurality of wiring terminals, which are disposed on a side of the insulating disc facing away from the current guiding terminal and are electrically connected to the current guiding terminal, and the wiring terminals are used for being electrically connected to the generator.

[0021] In one embodiment, the second conductive component further includes a plurality of insulating layers, and each insulating layer is disposed in one of the insulating gaps;

[0022] And / or, the material of the current guiding terminal is a high conductivity copper conductor.

[0023] In one embodiment, the insulating disc is provided with a through hole corresponding to the hollow shaft, a bushing is disposed in the through hole, and the hollow shaft is rotationally matched with the bushing; the bushing is provided with a through hole communicating the through hole and the hollow part of the hollow shaft, and the through hole, the through hole and the hollow part of the hollow shaft together form a through hole for passing a communication cable.

[0024] In one embodiment, a dust-proof plate is disposed on a side of the base facing away from the mounting surface, the dust-proof plate is tapered facing the hollow shaft to form a tapered apex portion, a hollow tube is provided corresponding to the hollow shaft at the tapered apex portion, a through guiding hole is provided in the mounting surface, one end of the hollow tube passes through the guiding hole and is communicated with the hollow part of the hollow shaft, and the other end of the hollow tube penetrates through the dust-proof plate and is communicated with the external environment, and the hollow tube is used for passing a communication cable.

[0025] The current collecting device of the technical solution of the present invention supports and mounts the first conductive component and the rotating mechanism through the mounting surface on the base. A hollow shaft is provided on the mounting surface, so that the rotating mechanism can rotate around the hollow shaft. At the same time, the first conductive components are spaced around the hollow shaft. A current guiding terminal is provided on a side of the rotating mechanism facing the first conductive component, so that the current guiding terminal is in dynamic contact with the first conductive component. The rotating mechanism rotates around the hollow shaft together with the generator, the rotating mechanism rotates relative to the first conductive component, and the current guiding terminal is in dynamic contact with the first conductive component to achieve electrical conduction, so as to achieve the purpose of dynamically transmitting and collecting the power generated by the generator. This current collecting device replaces the special cable twisting and forced yaw zeroing devices in the prior art, so that the rotating mechanism, the generator and the outgoing cable connected therebetween always remain relatively stationary, and there is no need to design special limiting and zeroing devices, so that the cable will not be twisted and wound, which can effectively reduce the material, design and debugging costs, and at the same time reduce the power generation loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0027] Figure 1 Structural schematic diagram of the current collector device in an embodiment of the present invention;

[0028] Figure 2 Cross-sectional schematic diagram of the current collector device in an embodiment of the present invention;

[0029] Figure 3 Cross-sectional schematic diagram of the carbon brush assembly in an embodiment of the present invention;

[0030] Figure 4 Cross-sectional schematic diagram of the current collector device from another perspective in an embodiment of the present invention.

[0031] Explanation of the reference numerals in the drawings:

[0032] Label Name Label Name 100 Current collector device 2212 Second heat dissipation gap 1 Base 222 First heat dissipation gap 11 Mounting surface 23 Elastic part 111 Hollow shaft 3 Rotating mechanism 112 Through hole 31 Insulating disc 12 Dust-proof plate 311 Mounting groove 121 Hollow tube 312 Penetrating hole 2 First conductive component 313 Bushing 21 Supporting part 32 Second conductive component 211 Support shaft 321 Flow guiding terminal 22 Carbon brush assembly 322 Terminal 221 Carbon brush ring 323 Insulating layer 2211 Carbon brush segment 33 Slip ring hanger

[0033] The realization of the object of the present invention, its functional features and advantages will be further described in conjunction with the embodiments and with reference to the drawings. Detailed implementation manners

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0036] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where A and B are satisfied simultaneously.

[0037] In addition, in the present invention, descriptions such as "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] To ensure the maximization of power generation efficiency, a wind turbine needs to continuously perform yaw actions to align with the wind direction. Since the nacelle of the wind turbine rotates around the same axis relative to the tower barrel, after the nacelle rotates a certain angle, the power cable twists itself or gets entangled with other power cables, which not only wears the outer insulation layer of the power cable but also causes poor local heat dissipation. Prolonged wear causes the torsional strength of the cable to decrease and is prone to breakage, which not only leads to the shutdown of the unit but also easily causes a fire accident.

[0039] In view of the above problems, the prior art usually adopts a forced yaw return-to-zero device and a special wear-resistant insulated twisted cable. However, when using a forced yaw return-to-zero device, an additional forced return device needs to be designed for the wind turbine, which increases the material and design costs. Moreover, additional debugging is required before the wind turbine is put into operation to calibrate the yaw zero degree and the forced yaw angle, increasing the man-hour cost. Also, during the period when the wind turbine yaws to a certain angle and then is forced to return to zero, the wind turbine cannot generate electricity normally, resulting in a loss of power generation. For the special wear-resistant insulated twisted cable, it can only relieve the wear for a short time, cannot solve the long-term wear situation, and its cost is also higher than that of ordinary cables.

[0040] Based on the above problems, the present invention proposes a power collection device 100. It can be understood that the power collection device 100 is used to transmit and collect the electric power generated by the generator in the wind power generation set, can replace the original twisted cable by means of dynamic abutment, and can perform dynamic power transmission, effectively reducing the material procurement cost and the design and debugging costs.

[0041] Please refer to Figures 1 to 4As shown, in the embodiment of the present invention, the current collecting device 100 is used to connect to the generator of a wind turbine. The current collecting device 100 includes a base 1, a first conductive component 2, and a rotating mechanism 3. The base 1 is provided with an installation surface 11, and a hollow shaft 111 protrudes from the installation surface 11. The first conductive component 2 is disposed on the installation surface 11 and is arranged around the hollow shaft 111. The rotating mechanism 3 is rotatably connected to one end of the hollow shaft 111 away from the installation surface 11. A diversion terminal 321 is provided on one side of the rotating mechanism 3 facing the first conductive component 2. The diversion terminal 321 is in rotational abutment with the first conductive component 2 and is electrically connected. The rotating mechanism 3 is used to connect to the generator, and the generator is electrically connected to the diversion terminal 321.

[0042] In this embodiment, as Figure 1 and Figure 2 shown, the base 1 of the current collecting device 100 is used to support and install the first conductive component 2 and the rotating mechanism 3. The base 1 is the stationary part of the current collecting device 100, also known as the stator, fixed part, or stationary body, which is not limited herein. One end of the base 1 is fixedly connected to the tower barrel in the wind power generation device, and the other end is provided with an installation surface 11. It can be understood that the base 1 can be a base table, installation table, installation frame, or placement rack, etc., which is not limited herein.

[0043] In this embodiment, a hollow shaft 111 is provided on one side of the installation surface 11 facing the rotating mechanism 3. The rotating mechanism 3 is disposed at one end of the hollow shaft 111 away from the installation surface 11, and the rotating mechanism 3 can rotate around the hollow shaft 111. At the same time, on the installation surface 11, a first conductive component 2 is also arranged around the hollow shaft 111, and the first conductive component 2 is annularly arranged around the periphery of the hollow shaft 111.

[0044] It can be understood that the hollow shaft 111 is fixed to the installation surface 11 on the base 1. On the one hand, it is used to support the rotating mechanism 3, and on the other hand, it is used to ensure that the rotating mechanism 3 rotates smoothly around the hollow shaft 111. The current collecting device 100 is used for dynamic power transmission and collection. That is, in the wind turbine, while the current collecting device 100 rotates together with the nacelle, it also transmits the power generated by the generator to the energy storage system or the power grid. The first conductive component 2 is designed to be centered on the hollow shaft 111 and surround the periphery of the hollow shaft 111, ensuring the continuity and reliability of power transmission.

[0045] In this embodiment, the rotating mechanism 3 is rotatably disposed on the hollow shaft 111 and abuts against one side of the first conductive component 2 to achieve dynamic contact power transmission of the current collecting device 100. A diversion terminal 321 is provided on one side of the rotating mechanism 3 facing the first conductive component 2. One side of the diversion terminal 321 facing the base 1 is in movable abutment with the first conductive component 2, and the other end is connected to the outgoing line end of the generator.

[0046] It can be understood that the rotating mechanism 3 is the moving part of the current collector device 100, also known as the rotor, rotating part or slip ring assembly, which is not limited here. While the current guiding terminal 321 rotates with the rotating mechanism 3, it also transmits the electric power generated by the generator to the first conductive component 2, realizing the dynamic abutment and dynamic power transmission between the first conductive component 2 and the current guiding terminal 321. By using this structure to replace the original special torsion cable, the material and design costs can be effectively reduced.

[0047] The current collector device 100 of the present invention supports and installs the first conductive component 2 and the rotating mechanism 3 through the installation surface 11 on the base 1. A hollow shaft 111 is provided on the installation surface 11, enabling the rotating mechanism 3 to rotate around the hollow shaft 111. At the same time, the first conductive components 2 are arranged at intervals around the hollow shaft 111. A current guiding terminal 321 is provided on one side of the rotating mechanism 3 facing the first conductive component 2, making the current guiding terminal 321 dynamically abut against the first conductive component 2. The rotating mechanism 3 rotates around the hollow shaft 111 following the generator. The rotating mechanism 3 rotates relative to the first conductive component 2, and the current guiding terminal 321 dynamically abuts against the first conductive component 2 to achieve electrical conduction, so as to achieve the purpose of dynamically transmitting and collecting the electric power generated by the generator. The current collector device 100 replaces the special torsion cable and the forced yaw zeroing device in the prior art, making the rotating mechanism 3, the generator and the outgoing cable connected therebetween always remain relatively stationary, and eliminating the need to design special limiting and zeroing devices, so that the cable will not be twisted and wound. When applied to a wind turbine generator set, it can effectively reduce the material, design and commissioning costs, and at the same time reduce the power generation loss.

[0048] In an embodiment, the first conductive component 2 includes a support member 21, a carbon brush assembly 22 and an elastic member 23. The support member 21 is arranged on the installation surface 11 and is arranged around the hollow shaft 111. The carbon brush assembly 22 is slidably connected to the support member 21. The elastic member 23 is sleeved on the support member 21. One end of the elastic member 23 elastically abuts against the installation surface 11, and the other end of the elastic member 23 is elastically connected to the carbon brush assembly 22, so that the carbon brush assembly 22 abuts against the current guiding terminal 321 and is electrically conducted.

[0049] In this embodiment, as Figure 1 and Figure 2 shown, the first conductive component 2 is arranged around the hollow shaft 111, wherein the support members 21 are arranged at annular intervals around the hollow shaft 111. One end of the support member 21 is installed on the side of the installation surface 11 facing the rotating mechanism 3, and the carbon brush assembly 22 is installed at the other end of the support member 21. The support member 21 can be a support frame, a support rod or a guide rod, which is not limited here. It can be understood that a sliding groove is provided at one end of the carbon brush assembly 22 facing the support member 21 for installing and placing the support member 21. The support member 21 supports and guides the carbon brush assembly 22 to ensure that the carbon brush assembly 22 abuts against the current guiding terminal 321 at the correct position to achieve electrical conduction.

[0050] In this embodiment, as Figure 1 and Figure 2 shown, both ends of the elastic member 23 are respectively abutted against the mounting surface 11 and the carbon brush assembly 22, and the carbon brush assembly 22 is pushed to abut against the current conducting terminal 321, so as to ensure that the contact surface of the carbon brush assembly 22 is completely abutted against the current conducting terminal 321, and avoid eccentric wear. While under the elastic force of the elastic member 23, part of the support member 21 still remains in contact with the carbon brush assembly 22, so that the carbon brush assembly 22 slides up and down along the support member 21. It can be understood that the elastic member 23 pushes the carbon brush assembly 22 to always be in close contact with the second conductive assembly 32. When the carbon brush assembly 22 is worn after running for a period of time, due to the existence of the elastic member 23, it can still maintain contact with the current conducting terminal 321. At the same time, the elastic member 23 also ensures that the carbon brush assembly 22 can slide up and down freely, avoiding affecting the rotation of the rotating mechanism 3 due to jamming and generating heat due to poor contact with the second conductive assembly 32.

[0051] In one embodiment, the support member 21 includes a plurality of support shafts 211 provided on the mounting surface 11. The plurality of support shafts 211 are spaced around the hollow shaft 111. Each support shaft 211 is sleeved with an elastic member 23, and the carbon brush assembly 22 is slidably connected to one end of the plurality of support shafts 211 facing away from the mounting surface 11.

[0052] In this embodiment, as Figure 2 shown, the support member 21 is composed of a plurality of support shafts 211. The support shaft 211 can also be a support rod, a support column or a support bar, etc., which is not limited herein. The support shaft 211 is provided on the mounting surface. The support shafts 211 are arranged in a row at intervals along the radial direction of the hollow shaft 111. At the same time, multiple rows are also provided at intervals in the circumferential direction around the hollow shaft 111. The plurality of support shafts 211 are arranged on the same circumference.

[0053] It can be understood that the plurality of support shafts 211 together form the support member 21 to support and guide the carbon brush assembly 22. The carbon brush assembly 22 is slidably connected to the plurality of support shafts 211, and an elastic member 23 is sleeved on each support shaft 211 to ensure that the height of the carbon brush assembly 22 is the same at each place, and to ensure the stability of current transmission and the consistency of wear during long-term use in the dynamic contact with the current conducting terminal 321.

[0054] In one embodiment, the carbon brush assembly 22 includes a plurality of carbon brush rings 221. Each carbon brush ring 221 is slidably connected to at least one support shaft 211. The plurality of carbon brush rings 221 are arranged around the hollow shaft 111 and are spaced at intervals along the radial direction of the hollow shaft 111, and a first heat dissipation gap 222 is formed between two adjacent carbon brush rings 221.

[0055] In this embodiment, as Figure 3As shown in the figure, in the radial direction along the hollow shaft 111, the carbon brush assembly 22 is provided with a plurality of annular carbon brush rings 221, and the carbon brush rings 221 are all concentric circles arranged around the hollow shaft 111. Each carbon brush ring 221 requires at least one support shaft 211 for support and guidance. A first heat dissipation gap 222 is formed between two adjacent carbon brush rings 221. It can be understood that the first heat dissipation gaps 222 are also arranged at intervals in the radial direction along the hollow shaft 111. During the rotational friction between the carbon brush ring 221 and the current collecting terminal 321, the first heat dissipation gaps 222 can effectively dissipate heat, avoiding the danger caused by overheating of the current collecting device due to long-term friction.

[0056] In one embodiment, each carbon brush ring 221 includes a plurality of carbon brush segments 2211. Each carbon brush segment 2211 is arranged in an arc shape and is slidably connected to at least one support shaft 211. The plurality of carbon brush segments 2211 of each carbon brush ring 221 are arranged around the hollow shaft 111 and are located on the same circumference. A second heat dissipation gap 2212 is formed at intervals between two adjacent carbon brush segments 2211 of each carbon brush ring 221, and the first heat dissipation gap 222 communicates with the second heat dissipation gap 2212.

[0057] In this embodiment, as Figure 3 shown, the carbon brush, also known as the brush, is a sliding contactor. Each carbon brush ring 211 arranged around the hollow shaft 111 is composed of a plurality of carbon brush segments 2211. Each carbon brush segment 2211 is slidably connected to at least one support shaft 211, and the plurality of carbon brush segments 2211 are on the same circumference to correspond to the current collecting terminal 321.

[0058] It can be understood that each carbon brush segment 2211 requires at least one support shaft 211 for support. To save materials and use as few carbon brush segments 2211 as possible to form a complete carbon brush ring 221, the carbon brush segments 2211 are usually arranged in an arc shape. By changing the arc degree of the carbon brush segment 2211, carbon brush rings 221 with different diameters can be changed. That is, when the carbon brush segment 2211 is close to the hollow shaft 111, its arc length is shorter and its width is wider; when the carbon brush segment 2211 is far from the hollow shaft 111, its arc length is longer and its width becomes narrower accordingly. Such a setting can save materials of the carbon brush assembly 22 while ensuring that the contact area between each carbon brush ring 221 and the second conductive component 32 is the same, and maintaining the continuous dynamic contact and dynamic power transmission between the carbon brush assembly 22 and the second conductive component 32. A second heat dissipation gap 2212 for heat dissipation is also provided between two adjacent carbon brush segments 2211 on the same circumference, and the first heat dissipation gap 222 communicates with the second heat dissipation gap 2212, so as to form a heat dissipation gap in the carbon brush assembly 22 that is conducive to air circulation for heat dissipation.

[0059] In one embodiment, the rotating mechanism 3 includes an insulating disk 31, a second conductive component 32, and a slip ring hanger 33. On one side of the insulating disk 31 facing the first conductive component 2, there is an installation groove 311. The bottom wall of the installation groove 311 is rotationally connected to the hollow shaft 111. The second conductive component 32 includes a plurality of current guiding terminals 321 disposed in the installation groove 311. Each current guiding terminal 321 is arranged around the hollow shaft 111 and is arranged in a ring corresponding to the carbon brush assembly 22. The plurality of current guiding terminals 321 are sequentially spaced along the radial direction of the hollow shaft 111. There is an insulating gap between two adjacent current guiding terminals 321. One end of the slip ring hanger 33 is connected to the side of the insulating disk 31 facing away from the installation groove 311, and the other end of the slip ring hanger 33 is used to connect to the nacelle of the wind turbine generator set.

[0060] In this embodiment, as Figure 1 and Figure 2 shown, the second conductive component 32 is disposed in the installation groove 311. The internal insulating part of the insulating disk 31 is formed by a casting process. The second conductive component 32 and the slip ring hanger 33 are temporarily fixed in the same plane according to the design dimensions using a mold, and then the gaps between the parts are filled by casting with an insulating material. In particular, the insulating gap between the current guiding terminals 321 is filled. When the gaps between the components are filled, continue to cast with the insulating material until the insulating material is two to three centimeters higher than the current guiding terminals 321 and then stop casting to complete the production of the internal insulating part of the insulating disk 31. In another embodiment, the components can also be connected and fixed by an insulating material to form the rotating mechanism 3, so as to reduce the amount of insulating material used and reduce the overall weight of the rotating mechanism 3.

[0061] It can be understood that the insulating disk 31 is a structural component of the rotating mechanism 3. The insulating disk 31 is rotatably arranged on the hollow shaft 111. On the one hand, the rotating mechanism 3 is rigidly connected to the nacelle or the generator through the structural member insulating disk 31, so that when the nacelle rotates under the guidance of the yaw device, the rotating mechanism 3 also rotates together. The hollow shaft 111 disposed on the base 1 provides rotational support for the rotating mechanism 3. At the same time, the second conductive component 32 is embedded in the insulating disk 31 and abuts against the first conductive component 2.

[0062] In this embodiment, as Figure 1 、 Figure 2 and Figure 4 shown, a plurality of current guiding terminals 321 are arranged on the surface of the insulating disk 31 facing the carbon brush assembly 22. The current guiding terminals 321 corresponding to the carbon brush rings 221 are also arranged at different diameters in a ring along the radial direction of the hollow shaft 111. The plurality of current guiding terminals 321 are also all arranged around the hollow shaft 111. Each ring of current guiding terminals 321 abuts against each carbon brush ring 221 correspondingly to realize the dynamic abutment between the rotating mechanism 3 and the first conductive component 2.

[0063] It can be understood that an insulating gap is provided between two adjacent current guiding terminals 321 for pouring insulating materials, so that the current guiding terminals 321 are insulated from each other to form independent circuits. A plurality of current guiding terminals 321 together form a first conductive surface composed of a plurality of rings on one side of the insulating disc 31, and a second conductive surface composed of a plurality of rings is formed on the side of the carbon brush ring 221 in contact with the current guiding terminals 321. The first conductive surface and the second conductive surface are in dynamic contact with each other to realize the dynamic transmission of the electric power generated by the generator to the first conductive component 2 through the second conductive component 32.

[0064] In this embodiment, as Figure 1 and Figure 2 shown, one end of the slip ring hanger 33 is installed on the periphery of the insulating disc 31, and the other end is connected to the engine room. When the engine room rotates, the insulating disc 31 is driven to rotate around the hollow shaft 111 through the slip ring hanger 33, so as to realize the synchronous rotation of the rotating mechanism 3 with the engine room and the generator. In another embodiment, the slip ring hanger 33 can be sleeved outside the generator outgoing cable and drive the insulating disc 31 to rotate as a structural member.

[0065] It can be understood that through the slip ring hanger 33, the synchronous rotation of the rotating mechanism 3 with the engine room and the generator is realized, that is, the engine room, the generator, the generator outgoing cable and the rotating mechanism 3 always remain relatively stationary, so that the generator outgoing cable always remains in a relaxed state, and the phenomenon that the cable twists itself or twists together with other cables will not occur, thus avoiding the problems of outer insulation layer wear and local poor heat dissipation caused by continuous cable twisting.

[0066] In one embodiment, the second conductive component 32 further includes a plurality of wiring terminals 322. The wiring terminals 322 are arranged on the side of the insulating disc 31 opposite to the current guiding terminals 321 and are electrically connected to the current guiding terminals 321. The wiring terminals 322 are used to be electrically connected to the generator.

[0067] In this embodiment, as Figure 2 shown, one end of the second conductive component 32 facing the first conductive component 2 is the current guiding terminal 321. The current guiding terminal 321 is in contact with the side of the carbon brush assembly 22 opposite to the base 1. The other end of the second conductive component 32 is the wiring terminal 322. The wiring terminals 322 are discretely distributed on the side of the insulating disc 31 opposite to the current guiding terminals 321. The wiring terminals 322 are connected to the generator and are used to transmit the electric power generated by the generator.

[0068] It can be understood that the second conductive component 32 is provided with two ends as a whole. It is connected to the generator through the wiring terminals 322, and then the generated electric power is transmitted to the first conductive component 2 through the current guiding terminals 321, so as to realize dynamic electric power transmission on the basis of dynamic contact. A safe distance should be maintained between the wiring terminals 322 and the insulating disc 31 and between the wiring terminals 322 to meet the requirements of electrical isolation.

[0069] In one embodiment, the number of turns of the diversion terminal 321 is an integer multiple of 3, and the number of connection terminals 322 is an integer multiple of 6. Each diversion terminal 321 is connected to two connection terminals 322. It can be understood that, for the reasons of reducing harmonics, improving power generation efficiency, and reducing power transmission losses, the generator in a wind turbine is usually three-phase power generation. Therefore, according to the requirements of the wind turbine generator outlet cable, the diversion terminal 321 is also processed into rings with three, six, or nine different diameters. One ring of the diversion terminal 321 in each second conductive component 32 is connected to two connection terminals 322.

[0070] Optionally, the material of the diversion terminal 321 is a high-conductivity copper conductor to enhance the power transmission efficiency between the carbon brush assembly 22 in the first conductive component 2 during power transmission and reduce power transmission losses.

[0071] Optionally, the second conductive component 32 further includes a plurality of insulating layers 323, and each insulating layer 323 is disposed in an insulating gap. It can be understood that the insulating gap is used to isolate adjacent two diversion terminals 321 to form independent electrical paths, and insulating materials are poured and filled in the insulating gap to form the insulating layer 323, so as to prevent adjacent diversion terminals 321 from having tip conduction in the air due to too close distance, resulting in an affected circuit. At the same time, during the pouring process, the insulating layer 323 is flush with the first conductive surface formed by the diversion terminal 321 on the side facing the first conductive component 2, ensuring the smoothness and lubricity of the relative rotation of the rotating mechanism 3 and the carbon brush assembly 22, and avoiding jamming resulting in poor contact.

[0072] In one embodiment, the insulating disk 31 is provided with a through hole 312 corresponding to the hollow shaft 111, and a bushing 313 is provided in the through hole 312. The hollow shaft 111 is rotationally matched with the bushing 313; the bushing 313 is provided with a through hole communicating the through hole 312 and the hollow part of the hollow shaft 111. The through hole 312, the through hole, and the hollow part of the hollow shaft 111 together form a through hole for passing a communication cable.

[0073] In this embodiment, as Figure 2 shown, when the insulating disk 31 is poured, a through hole 312 is left corresponding to the hollow shaft 111. At the same time, a through hole is provided on the side of the bushing 313 facing the insulating disk 31 for passing a low-voltage communication cable subsequently. It can be understood that the through hole 312, the through hole, and the hollow part of the hollow shaft 111 are mutually communicated, and at the same time, the hollow shaft 111 is communicated with the space on the side of the base 1 opposite to the mounting surface 11 to form a through hole for passing a cable for low-voltage circuit power supply and communication control of the wind turbine.

[0074] In this embodiment, as Figure 2As shown, the rotating mechanism 3 is rotationally connected to the hollow shaft 111 through a bushing 313 provided on the insulating disc 31. A groove for installing the bushing 313 is provided at the geometric center of the insulating disc 31 facing the first conductive component 2, and one end of the hollow shaft 111 is installed inside the bushing 313.

[0075] It can be understood that the bushing 313 is relatively fixed to the insulating disc 31. The bushing 313 provides a certain degree of sealing protection for the hollow shaft 111 to prevent dust and oil from invading and causing rotational jerks. A ball bearing is provided at one end of the hollow shaft 111 in contact with the bushing 313 to ensure the smooth rotation of the rotating mechanism 3 around the hollow shaft 111. At the same time, a shaft shoulder is provided at one end of the hollow shaft 111 facing the insulating disc 31, and the bushing 313 has a concave-convex structure corresponding to the shaft shoulder. A thrust bearing is placed at the shaft shoulder to bear the force exerted by the insulating disc 31 in the axial direction.

[0076] In one embodiment, a dust-proof plate 12 is provided on the side of the base 1 facing away from the mounting surface 11. The dust-proof plate 12 is tapered facing the hollow shaft 111 to form a tapered apex portion. A hollow tube 121 is provided corresponding to the hollow shaft 111 at the tapered apex portion. A through guiding hole 112 is provided on the mounting surface 11. One end of the hollow tube 121 passes through the guiding hole 112 and communicates with the hollow portion of the hollow shaft 111, and the other end of the hollow tube 121 passes through the dust-proof plate 12 and communicates with the external environment. The hollow tube 121 is used for threading communication cables.

[0077] In this embodiment, as Figure 1 and Figure 2 shown, a dust-proof plate 12 is also provided on the side of the base 1 facing away from the mounting surface 11. The side of the dust-proof plate 12 facing the first conductive component 2 is set as a cone with a middle-high and surrounding-low shape, or can also be set as a dome shape, an arc shape or an arch shape, which is not limited here. At the same time, the highest part of the central protrusion, that is, the tapered apex portion, is relatively arranged with the hollow portion of the hollow shaft 111. The circumferential cross-sectional area of the dust-proof plate 12 is larger than the circumferential cross-sectional area of the rotating mechanism 3, and a raised partition or groove is provided at the periphery of the dust-proof plate 12.

[0078] It can be understood that the dust-proof plate 12 is used to receive the dust generated by the contact friction between the carbon brush assembly 22 and the current-carrying terminal 321. The dust is mainly generated due to the daily wear of the carbon brush assembly 22. The dust-proof plate 12 is set as a cone with a middle-high and surrounding-low shape to make the dust gather along the slope to the periphery of the dust-proof plate 12 after receiving the dust, which is convenient for subsequent dust cleaning and collection. A raised partition or groove is also provided at the periphery of the dust-proof plate 12 for the same purpose of making the dust gather and collect more easily. The circumferential cross-sectional area of the dust-proof plate 12 is larger than the circumferential cross-sectional areas of the rotating mechanism 3 and the carbon brush assembly 22 to collect the scattered dust to a greater extent and avoid the dust from drifting to other components inside the wind turbine and affecting the normal operation of the unit.

[0079] In this embodiment, if Figure 2 As shown, a hollow tube 121 is provided in the raised portion in the middle of the dustproof plate 12, i.e., the conical top portion, corresponding to the hollow shaft 111. One end of the hollow tube 121 is connected to a conducting hole 112 provided on the mounting surface 11, and the other end passes through the dustproof plate 12 and is connected to a cavity located at the lower part of the dustproof plate 12. In this way, the hollow tube 121, the hollow shaft 111 and the through hole 312 provided on the insulating disk 31 can be connected to form a vertical channel for passing communication cables and preventing dust from entering the interior of the collector 100.

[0080] It can be understood that the hollow tube 121 can allow the communication cable to pass through the bottom of the base 1, pass through the hollow shaft 111, and pass out from the side of the through hole 312 facing away from the first conductive component 2, so that the communication cable is not restricted by the rotating mechanism 3 and does not need to rotate with the cabin, thereby ensuring the power supply and communication control of the low-voltage circuit inside the wind turbine. In addition, the hollow tube 121 can physically isolate dust, preventing dust from entering the rotating mechanism 3 and the hollow shaft 111 and affecting the life and normal operation of the components.

[0081] The present invention further proposes a wind power generation device, which includes a wind turbine generator set, a tower and the above-mentioned collector 100. The specific structure of the collector 100 refers to the aforementioned embodiment. Since the wind power generation device adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the aforementioned embodiments, which will not be described one by one here.

[0082] In this embodiment, the wind turbine generator set includes a nacelle and an impeller connected to the nacelle, the nacelle is rotatably connected to the tower, the nacelle is provided with a generator, the rotating mechanism 3 of the current collector 100 is provided in the nacelle and connected to the generator, and the base 1 of the current collector 100 is connected to the tower. It can be understood that a structure of a power conductor (such as a tube busbar, a cable) is provided in the tower, and the wind energy conversion component of the wind turbine generator set is electrically connected to the power conductor in the tower through the current collector 100.

[0083] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A current collecting device for connecting to a generator of a wind turbine, characterized in that, The current collector device includes: a base provided with a mounting surface on which a hollow shaft protrudes; a first conductive component disposed on the mounting surface and arranged around the hollow shaft; and a rotating mechanism rotatably connected to one end of the hollow shaft away from the mounting surface. A current guiding terminal is provided on one side of the rotating mechanism facing the first conductive component. The current guiding terminal is in rotational contact with and electrically connected to the first conductive component. The rotating mechanism is used to connect to the generator, and the generator is electrically connected to the current guiding terminal; wherein the first conductive component includes a support member, a carbon brush assembly, and an elastic member. The support member is disposed on the mounting surface and arranged around the hollow shaft. The carbon brush assembly is slidably connected to the support member. A sliding groove is provided at one end of the carbon brush assembly facing the support member. The elastic member is sleeved on the support member. One end of the elastic member is elastically abutted against the mounting surface, and the other end of the elastic member is elastically connected to the carbon brush assembly, so that the carbon brush assembly is in contact with and electrically connected to the current guiding terminal; the support member includes a plurality of support shafts disposed on the mounting surface, and the plurality of support shafts are spaced apart around the hollow shaft. Each support shaft is sleeved with the elastic member, and the carbon brush assembly is slidably connected to one end of the plurality of support shafts facing away from the mounting surface.

2. The current collector device according to claim 1, wherein The carbon brush assembly includes a plurality of carbon brush rings. Each carbon brush ring is slidably connected to at least one of the support shafts. The plurality of carbon brush rings are arranged around the hollow shaft and are sequentially spaced apart in the radial direction of the hollow shaft, and a first heat dissipation gap is formed between two adjacent carbon brush rings.

3. The current collector device according to claim 2, characterized in that, Each carbon brush ring includes a plurality of carbon brush segments. Each carbon brush segment is arc-shaped and is slidably connected to at least one of the support shafts; the plurality of carbon brush segments of each carbon brush ring are arranged around the hollow shaft and are located on the same circumference. A second heat dissipation gap is formed at intervals between two adjacent carbon brush segments of each carbon brush ring, and the first heat dissipation gap is communicated with the second heat dissipation gap.

4. The current collector device according to claim 1, characterized in that, The rotating mechanism includes: an insulating disk provided with a mounting groove on one side facing the first conductive component, and the bottom wall of the mounting groove is rotatably connected to the hollow shaft; a second conductive component including a plurality of the current guiding terminals disposed in the mounting groove. Each current guiding terminal is arranged around the hollow shaft and is annularly arranged corresponding to the carbon brush assembly. The plurality of current guiding terminals are sequentially spaced apart in the radial direction of the hollow shaft, and an insulating gap is provided between two adjacent current guiding terminals; and a slip ring hanger having one end connected to the side of the insulating disk facing away from the mounting groove, and the other end of the slip ring hanger is used to connect to the nacelle of the wind turbine generator set.

5. The current collector device according to claim 4, characterized in that, The second conductive component further includes a plurality of wiring terminals disposed on the side of the insulating disk facing away from the current guiding terminals and electrically connected to the current guiding terminals. The wiring terminals are used to be electrically connected to the generator.

6. The current collector device according to claim 4, characterized in that The second conductive component further includes a plurality of insulating layers, and each insulating layer is disposed in one of the insulating gaps; And / or, the material of the diversion terminal is a copper conductor with high conductivity.

7. The current collector device according to claim 4, characterized in that, The insulating disc is provided with a through hole corresponding to the hollow shaft. A bushing is arranged in the through hole, and the hollow shaft is rotationally matched with the bushing; the bushing is provided with a through hole communicating the through hole and the hollow part of the hollow shaft. The through hole, the through hole and the hollow part of the hollow shaft together form a through hole for passing a communication cable.

8. The current collector device according to any one of claims 1 to 7, characterized in that A dust-proof plate is arranged on one side of the base facing away from the mounting surface. The dust-proof plate is arranged in a conical shape facing the hollow shaft to form a conical apex part. A hollow tube is arranged corresponding to the hollow shaft at the conical apex part. A through guiding hole is arranged in the mounting surface. One end of the hollow tube passes through the guiding hole and communicates with the hollow part of the hollow shaft. The other end of the hollow tube penetrates through the dust-proof plate and is connected to the external environment. The hollow tube is used for passing a communication cable.

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