Current collection device and wind generating set

Abstract

The utility model provides a current collection device and a wind generating set. Wherein the current collection device comprises a supporting seat, a rotating shaft, a rotor end connecting assembly and a stator end connecting assembly, and the rotating shaft is rotatably arranged on the supporting seat; the conductive connecting structure comprises a rotor end connecting assembly and a stator end connecting assembly, the rotor end connecting assembly comprises at least one pair of parallel electric slip ring sets, and the electric slip ring sets are fixed to the radial outer side of the rotating shaft, used for being electrically connected with a power transmission cable in a cabin and capable of rotating along with the rotating shaft; the stator end connecting assembly is fixed on the supporting seat and located on the radial outer side of the rotor end connecting assembly, one end is in sliding contact with the radial outer side of the electric slip ring set to be electrically connected, and the other end extends in the radial direction of the electric slip ring set. According to the current collection device provided by the invention, the arrangement of internal parts is more compact under the condition that the transmission requirement of large current and the safety requirements of electrical clearance, creepage distance and the like can be met.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically to a power collection device and a wind turbine generator set. Background Technology

[0002] As wind turbine power continues to increase, the current that wind turbines need to transmit will also increase, which in turn requires a larger current carrying capacity from the slip rings. Furthermore, to meet this increased current carrying capacity, the load-bearing structure of the slip rings also needs to be continuously enlarged.

[0003] However, the internal space of a slip ring is limited, which restricts the arrangement of its internal components to some extent. How to rationally arrange the internal components of the slip ring within this limited space to ensure current carrying capacity while also meeting safety requirements such as electrical clearances and creepage distances is a problem that needs to be solved. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a current collection device and a wind turbine generator set to solve the problem of the reasonable arrangement of internal components in existing current collection rings when high current transmission needs to be met.

[0005] According to this utility model, a current collection device is provided, comprising: a support base, a rotating shaft, and at least one conductive connection structure. The support base is fixed in a tower. The rotating shaft is rotatably mounted on the support base. The conductive connection structure comprises: a rotor end connection assembly and a stator end connection assembly. The rotor end connection assembly includes at least one pair of parallel slip rings. The slip rings are fixed to the radially outer side of the rotating shaft for electrically connecting the power transmission cable output from the nacelle and are capable of rotating with the rotating shaft. The stator end connection assembly is fixed to the support base, located radially outer side of the rotor end connection assembly, with one end slidingly contacting the radially outer side of the slip rings for electrical connection, and the other end extending radially along the slip rings.

[0006] In some embodiments, the slip ring assembly includes: a first slip ring and a second slip ring, wherein the first slip ring has a first connecting lug protruding relative to its inner sidewall; the second slip ring is located below the first slip ring, and the second slip ring has a second connecting lug protruding relative to its inner sidewall; the first slip ring and the second slip ring are arranged mirror images of each other in the radial direction relative to the rotating shaft, such that the distance between the first connecting lug and the second connecting lug is limited to a preset range.

[0007] In some embodiments, the first connecting lug and the second connecting lug are staggered, and the rotor end connection assembly includes a rotor bar and two rotor connecting bars. The rotor bar has a wiring port for connecting the power transmission cable. One end of the two rotor connecting bars is connected to the rotor bar, and the other end of the two rotor connecting bars is electrically connected to the first connecting lug and the second connecting lug, respectively.

[0008] In some embodiments, the first and second slip rings are respectively arranged radially outward from the axial direction of the shaft. The lower end of the shaft is provided with a mounting flange, which is rotatably connected to the support base. The rotor end connection assembly further includes a slip ring insulating support rod. The lower end of the slip ring insulating support rod is connected to the mounting flange, and the upper end of the slip ring insulating support rod passes through the second connecting lug and the first connecting lug in sequence to fix the first and second slip rings.

[0009] In some embodiments, the outer wall of the slip ring insulating support rod between adjacent slip rings is provided with a skirt; and / or, the slip ring insulating support rod includes a plurality of segments, each segment being connected between adjacent slip rings.

[0010] In some embodiments, the stator end connection assembly includes: an annular plate, a brush assembly, and a stator end conductive plate. The annular plate is fixed to the support base and located radially outside the slip ring assembly, with a gap between it and the slip ring assembly. The brush assembly is disposed on the annular plate, making sliding contact and electrical connection with the radially outside of the slip ring assembly to conduct electricity between the slip ring assembly and the annular plate. The stator end conductive plate is connected to the radially outside of the annular plate and extends outward.

[0011] In some embodiments, the brush assembly includes a plurality of first brushes disposed on the upper surface of the annular plate and a plurality of second brushes disposed on the lower surface of the annular plate, wherein the plurality of first brushes are in contact with the first slip ring and the plurality of second brushes are in contact with the second slip ring.

[0012] In some embodiments, the support base includes a bottom wall and a side wall, the rotating shaft is disposed on the bottom wall, the rotor end connection assembly is located on the first side of the side wall, and the stator end conductive plate includes: a stator connection bar and a stator bar. The stator connection bar is disposed on the first side of the side wall, fixed and electrically connected to the annular plate, and can extend from the first side of the side wall to the second side of the side wall. The stator bar is disposed on the second side of the side wall and has an output interface for use as a terminal for power transmission cables inside the tower, wherein the stator connection bar can extend from the first side of the side wall to the second side of the side wall and be electrically connected to the stator connection bar.

[0013] In some embodiments, there are two stator end conductive plates, which are spaced apart on opposite sides of the annular plate. Each stator end conductive plate includes two stator connection bars. The first end of the two stator connection bars is connected to the edge of one side of the annular plate, and the second end of the two stator connection bars is close to each other and passes through the sidewall to connect with the stator bar, thereby reducing the wiring length of the stator bar.

[0014] In some embodiments, the stator connection bar includes a stator mounting bar and a stator adjustment bar, wherein the stator mounting bar is fixed to the annular plate and electrically connected to the annular plate; one end of the stator adjustment bar is electrically connected to the stator mounting bar, and the other end extends from the side wall and is connected to the stator bar.

[0015] In some embodiments, the stator adjustment row is a bent plate with a bending angle of 150°-160°.

[0016] In some embodiments, an insulating sealing gasket is provided at the connection between the stator connection bar and the side wall.

[0017] In some embodiments, the annular plate is formed by splicing two arc-shaped plates or by integral die casting; and / or, the stator end connection assembly includes: an annular plate insulating support rod, the lower end of which is fixedly connected to the support base, and the upper end of which is fixed to the annular plate.

[0018] In some embodiments, a fan is provided on the second side of the sidewall, the fan being able to blow air toward the first side of the sidewall, such that the brush assembly is located in the air duct of the fan.

[0019] In some embodiments, the brush assembly includes a brush holder and brushes mounted in the brush holder. One end of each brush is electrically connected to the annular plate, and the other end of each brush is in sliding contact with and electrically connected to the slip ring assembly. The brush holder is mounted on the annular plate and has a ventilation gap between it and the annular plate, through which the air duct can pass.

[0020] In some embodiments, there are multiple conductive connection structures, which are spaced apart on the outer periphery of the rotating shaft along the axial direction of the shaft, and each conductive connection structure is used to connect to a corresponding phase transmission cable.

[0021] According to a second aspect of this application, a wind turbine generator set is provided, wherein the wind turbine generator set includes a tower, a nacelle mounted on the tower, and the aforementioned power collection device disposed in the tower, wherein the rotating shaft of the power collection device is connected to the nacelle, the support base of the power collection device is fixedly connected to the tower, and wherein the rotor end connection assembly of the power collection device is electrically connected to at least one phase power transmission cable output from the nacelle. Attached Figure Description

[0022] The above and other objects and features of this utility model will become clearer from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 This is a partial structural schematic diagram of the current collector provided according to an embodiment of the present utility model;

[0024] Figures 2 to 3 These are cross-sectional structural schematic diagrams of a current collector according to an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the slip ring of the current collector according to an embodiment of the present invention;

[0026] Figure 5 and Figure 6 These are schematic diagrams illustrating the connection structure between the slip ring assembly and the rotor connection bar according to one embodiment of the present invention.

[0027] Figures 7 to 11 These are schematic diagrams showing the connection structure of the brush assembly and the annular plate according to one embodiment of the present invention.

[0028] Figures 12 to 18 These are schematic diagrams of the stator end connection assembly according to one embodiment of the present invention.

[0029] Symbol Explanation

[0030] 10. Support base; 11. Bottom wall; 12. Side wall;

[0031] 20. Shaft; 21. Mounting flange;

[0032] 30. Rotor end connection assembly; 31. Slip ring assembly; 311. First slip ring; 3111. First connecting lug; 312. Second slip ring; 3121. Second connecting lug; 32. Slip ring insulating support rod; 33. Rotor row; 34. Rotor connecting row;

[0033] 40. Stator end connection assembly; 41. Annular plate; 42. Brush assembly; 421. First brush; 422. Second brush; 423. Brush box; 424. Brush; 425. Wire; 43. Stator end conductive plate; 431. Stator connection bar; 4311. Stator mounting bar; 4312. Stator adjustment bar; 432. Stator bar; 45. Annular plate insulating support rod; 60. Vent gap. Detailed Implementation

[0034] The following detailed descriptions are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be altered as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0035] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatus and / or systems described herein, many of which will become clear upon understanding the disclosure of this utility model.

[0036] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0037] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Thus, without departing from the teaching of the examples described herein, the first component, first assembly, first region, first layer, or first part referred to as the first component, first assembly, first region, first layer, or first part may also be referred to as the second component, second assembly, second region, second layer, or second part.

[0038] In the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to," or "mounted to" another element, the element may be directly "on" another element, directly "connected to," or "mounted to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly mounted to" another element, no other elements may be present in between.

[0039] The terminology used herein is for describing various examples only and is not intended to limit the invention. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. The term “a plurality” represents any quantity of two or more.

[0040] The directional terms "upper," "lower," "inner," and "outer" used in this invention are all based on the orientation of the current collector when it is in normal operating condition. This definition method will help ensure that readers or users can clearly understand the relative positional relationships of the various components and functions, and should not be construed as a limitation of this invention.

[0041] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains after understanding the invention. Unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and in this invention, and shall not be interpreted in an idealized or overly formalistic manner.

[0042] Furthermore, in the description of the examples, detailed descriptions of well-known related components or functions will be omitted when it is believed that such detailed descriptions would lead to a vague interpretation of the present invention.

[0043] The following will combine Figures 1 to 18 The present invention will now introduce the current collection device provided in the embodiments of this utility model.

[0044] According to an embodiment of this utility model, a current collection device is provided for collecting electrical energy generated by a generator in the engine room. Wherein, such as Figures 1 to 3 As shown, the current collector includes a support base 10, a rotating shaft 20, and at least one conductive connection structure. The support base 10 is fixed in the tower. The rotating shaft 20 is rotatably mounted on the support base 10 along the axial direction of the tower. The conductive connection structure is located radially outward of the rotating shaft 20. Specifically, the conductive connection structure includes a rotor end connection assembly 30 and a stator end connection assembly 40. The rotor end connection assembly 30 is fixed radially outward of the rotating shaft 20 and includes at least one pair of parallel slip ring assemblies 31 for electrically connecting the power transmission cable output from the nacelle and is able to rotate with the rotating shaft 20. The stator end connection assembly 40 is fixed on the support base 10 and located radially outward of the rotor end connection assembly 30. One end of the stator end connection assembly 40 slides in contact with the radially outward side of the slip ring assemblies 31 for electrical connection, and the other end extends radially outward along the slip ring assemblies 31.

[0045] According to the current collector device provided in the embodiments of this application, the current transmission capacity can be increased by connecting multiple slip rings in parallel. Each slip ring in the parallel slip ring group 31 can independently carry a portion of the current, thereby collectively meeting the demand for larger current transmission. In addition, the rotor end connecting assembly 30, including the parallel slip ring group 31, is fixed to the radial outer side of the rotating shaft 20. One end is in sliding contact with the radial outer side of the slip ring group 31 for electrical connection, and the other end extends radially outward along the slip ring group 31. In this way, the radial space can be utilized to the maximum extent, rather than adding additional axial space, making the entire slip ring device more compact and enabling a reasonable arrangement of internal components.

[0046] The current collector according to this application can meet the demand for high current transmission and allows for a more compact arrangement of internal components while meeting safety requirements such as electrical clearance and creepage distance. Furthermore, by connecting multiple slip rings in parallel, even if one slip ring fails, the others can continue to operate for current transmission, thus enhancing the reliability and redundancy of the entire current collector.

[0047] According to this application, the rotor end connection assembly 30 of the current collector is used to transmit electrical energy from the power transmission cable in the nacelle to the outside.

[0048] In some embodiments, the rotor end connection assembly 30 is fixed radially outward of the rotating shaft 20 and includes at least one pair of parallel slip ring groups 31. Here, the slip ring group 31 are in-phase slip rings, including a first slip ring 311 and a second slip ring 312, such as... Figures 4 to 6 As shown, the first slip ring 311 has a first connecting lug 3111 protruding from its inner sidewall. The second slip ring 312 is located below the first slip ring 311, and the second slip ring 312 has a second connecting lug 3121 protruding from its inner sidewall. The first slip ring 311 and the second slip ring 312 are arranged mirror images of each other with respect to the radial direction of the rotating shaft 20, so that the distance between the first connecting lug 3111 and the second connecting lug 3121 is limited to a preset range.

[0049] In these embodiments, mirror-mounting of the same-phase slip rings significantly reduces the gap between adjacent slip rings, thus saving space. It also helps maintain the balance and stability of the electrical connection. The distance between the first connecting lug 3111 and the second connecting lug 3121 is limited to a preset range. Here, the preset range is determined based on current transmission requirements and electrical safety requirements. By limiting this distance, the electrical connection between the two slip rings can be ensured to be reliable, while preventing interference or safety issues due to excessive proximity.

[0050] In some embodiments, the first connecting lug 3111 and the second connecting lug 3121 are staggered. The rotor end connection assembly 30 includes a rotor row 33 and two rotor connecting rows 34. The rotor row 33 has a wiring port for electrically connecting power transmission cables. One end of the two rotor connecting rows 34 is connected to the rotor row 33, and the other end of the two rotor connecting rows 34 is electrically connected to the first connecting lug 3111 and the second connecting lug 3121 respectively, so that the first electric slip ring 311 and the second electric slip ring 312 are connected in parallel.

[0051] In these embodiments, the first connecting lug 3111 and the second connecting lug 3121 are staggered on the inner wall of the slip ring. This arrangement not only helps to avoid interference during electrical connection but also optimizes the space utilization inside the current collector, making the entire device more compact. The rotor bar 33, as the core part of the electrical connection, has a wiring port for connecting to the upper power transmission cable. Two rotor connecting bars 34 are respectively connected to the rotor bar 33 and extend to the first connecting lug 3111 and the second connecting lug 3121 for electrical connection. In this way, current can smoothly flow from the power transmission cable through the rotor bar 33, then through the rotor connecting bars 34, and finally split to the first slip ring 311 and the second slip ring 312, achieving a parallel connection to meet the high current output requirements. By connecting the two slip rings (first slip ring 311 and second slip ring 312) of the same phase in parallel through a single rotor aluminum bar, this connection method reduces input points, thereby reducing connection points, doubling the wiring space, and improving overall electrical performance.

[0052] In some embodiments, the first slip ring 311 and the second slip ring 312 are respectively arranged at intervals along the axial direction of the rotating shaft 20 on the radially outer side of the rotating shaft 20. The lower end of the rotating shaft 20 is provided with a mounting flange 21, which is rotatably connected to the support base 10. The rotor end connection assembly 30 also includes a slip ring insulating support rod 32. The lower end of the slip ring insulating support rod 32 is connected to the mounting flange 21, and the upper end of the slip ring insulating support rod 32 passes through the second connecting lug 3121 and the first connecting lug 3111 in sequence to fix the first slip ring 311 and the second slip ring 312.

[0053] In these embodiments, the first slip ring 311 and the second slip ring 312 are respectively arranged radially outward from the axial direction of the rotating shaft 20. This helps optimize the internal spatial layout of the current collector and ensures that the two slip rings do not interfere with each other during electrical connection. A mounting flange 21 is provided at the lower end of the rotating shaft 20, which is used for rotatable connection with the support base 10, allowing the rotating shaft 20 to rotate freely on the support base 10. This ensures that the power transmission cable can move with the rotating shaft 20, thereby preventing multiple power transmission cables from twisting and knotting, and reducing the risk of cable damage. The slip ring insulating support rod 32 ensures electrical clearance and creepage distance, improving the safety of the current collector. In addition, the slip ring insulating support rod 32 also ensures that each slip ring is supported radially outward from the rotating shaft 20, preventing displacement or damage during rotation, and maintaining a certain insulation distance between each slip ring and the rotating shaft, further improving safety.

[0054] In some embodiments, the outer wall of the slip ring insulating support rod 32 between adjacent slip rings is provided with a skirt. The skirt increases the surface area of ​​the slip ring insulating support rod 32, thereby ensuring electrical clearance and creepage distance, and improving the safety of the current collector. In addition, the skirt can improve the overall mechanical strength. When the slip ring rotates or is subjected to external forces, the skirt can provide additional support to prevent the support rod from bending or breaking.

[0055] In some embodiments, the slip ring insulating support rod 32 includes multiple segments, each segment connected between adjacent slip rings. This segmented design simplifies the installation process of the slip ring insulating support rod 32. Specifically, each segment can be installed and removed independently, eliminating the need for complex operations on the entire support rod, thereby reducing the difficulty of installation and maintenance and improving work efficiency.

[0056] According to this application, the stator end connection assembly 40 of the current collector is used to transfer the electrical energy of the slip ring assembly 31 to the transmission cable in the tower.

[0057] like Figure 3 , Figures 7 to 11 As shown, the stator end connection assembly 40 includes an annular plate 41, a brush assembly 42, and a stator end conductive plate 43. The annular plate 41 is fixed to the support base 10 and is located radially outside the slip ring assembly 31, with a gap between it and the slip ring assembly 31 to ensure electrical clearance. The brush assembly 42 is disposed on the annular plate 41 and slides in contact with and is electrically connected to the radially outside of the slip ring assembly 31 to conduct electricity between the slip ring assembly 31 and the annular plate 41. The stator end conductive plate 43 is connected to the radially outside of the annular plate 41 and extends radially outward.

[0058] In this embodiment, the brushes in the brush assembly 42 are kept in contact with the slip ring by pressure applied by springs connected in the brush holder.

[0059] In this embodiment, the annular plate 41 serves as a support platform for the brush assembly 42 and also as a transitional part for power transmission. It is electrically connected to the slip ring assembly 31 via the brush assembly 42, thereby transferring power to the stator end conductive plate 43. The brush assembly 42 transfers power from the slip ring assembly 31 to the annular plate 41. Specifically, the brush assembly 42 is disposed on the annular plate 41, making sliding contact and electrical connection with the radially outer side of the slip ring assembly 31. This sliding contact ensures that the slip ring assembly 31 maintains electrical connection with the stator end connection assembly 40 even during rotation. The stator end conductive plate 43, as the terminal part of power transmission, is responsible for transferring power from the annular plate 41 to the external circuit. The slip ring assembly 31 can output one phase of the stator end conductive plate 43. This layout further saves space, making the entire current collection device more compact.

[0060] According to this application, the brush assembly 42 is a key component in the current collector, which is responsible for transferring the electrical energy from the rotating slip ring assembly 31 to the stationary annular plate 41, thereby realizing the electrical connection with the external circuit.

[0061] In some embodiments, the brush assembly 42 includes a plurality of first brushes 421 disposed on the upper surface of the annular plate 41 and a plurality of second brushes 422 disposed on the lower surface of the annular plate 41. The plurality of first brushes 421 are in contact with first slip rings 311, respectively, and are responsible for transferring electrical energy from the first slip rings 311 to the annular plate 41. The plurality of second brushes 422 are in contact with second slip rings 312, respectively, and are also responsible for transferring electrical energy from the second slip rings 312 to the annular plate 41.

[0062] In these embodiments, arranging multiple first brushes 421 and multiple second brushes 422 on both sides of an annular plate 41 simplifies the structure of the current collector, reduces the number of components, facilitates the inspection of the brushes' condition and the performance of necessary maintenance, thereby reducing maintenance complexity and overall weight. Furthermore, the neat arrangement of multiple first brushes 421 and multiple second brushes 422 on both sides of the annular plate 41 enhances air convection and improves heat dissipation efficiency.

[0063] In some embodiments, the support base 10 includes a bottom wall 11 and a side wall 12, a rotating shaft 20 is disposed on the bottom wall 11, a rotor end connection assembly 30 is located on the first side of the side wall 12, and a stator end conductive plate 43 includes a stator connection bar 431 and a stator bar 432. The stator connection bar 431 is disposed on the first side of the side wall 12, fixed to and electrically connected to the annular plate 41; the stator bar 432 is disposed on the second side of the side wall 12, electrically connected to the stator connection bar 431, and has an output interface for use as a terminal for power transmission cables inside the tower. The stator connection bar 431 can pass through from the first side of the side wall 12 to the second side of the side wall 12 and be electrically connected to the stator connection bar 431.

[0064] In these embodiments, the segmented stator end conductive plate 43 is easy to pass through the sidewall 12 to be assembled with the external stator row 432, and can also serve as a temperature measuring point for fan control, making the structure more compact.

[0065] According to this application, since the stator bus 432 outside the side wall 12 lacks ventilation and heat dissipation, its cross-sectional area can be appropriately increased to control temperature rise. Therefore, the stator bus 432 can be configured as a wider conductive plate. Furthermore, the multiple output interfaces on the output surface of the stator bus 432 allow for flexible adjustment of the power cable fixing point style to adapt to different wiring requirements. In addition, two layers of slip rings can output one phase of the stator aluminum bus, a layout that further saves space and makes the entire current collection device more compact.

[0066] In these embodiments, the stator end conductive plate 43 is connected to the radially outer side of the annular plate and extends outward for electrical connection with external circuitry. It comprises two parts: a stator connecting bar 431 and a stator bar 432. The stator connecting bar 431 is fixed to the annular plate 41 and electrically connected to it. It establishes an electrical connection with the slip ring assembly via a brush assembly, thereby transferring electrical energy from the rotating slip ring assembly to the stationary annular plate. The design of the stator connecting bar 431 typically considers requirements for electrical performance, mechanical strength, and heat dissipation. It is usually made of a material with good electrical conductivity, such as copper or aluminum alloy, and may be equipped with heat dissipation components such as heat sinks or heat dissipation grooves to reduce heat generated during electrical energy transfer.

[0067] According to this application, the current collector employs two stator end conductive plates 43, which are spaced apart and arranged on opposite sides of the annular plate 41. This not only improves the reliability and stability of power transmission but also helps optimize the overall structure and performance of the current collector. It should be noted, however, that a single stator end conductive plate 43 can also be used, with output from one or both sides, depending on different layout requirements; this application does not impose excessive limitations.

[0068] In some embodiments, there are two stator end conductive plates 43, which are spaced apart on opposite sides of the annular plate 41. Each stator end conductive plate 43 includes two stator connection bars 431. The first end of the two stator connection bars 431 is connected to the edge of one side of the annular plate 41, and the second end of the two stator connection bars 431 is close to each other and passes through the side wall 12 to connect with the stator bar 432, thereby reducing the wiring length L of the stator bar 432.

[0069] like Figures 12 to 17 As shown, the second ends of the two stator connection bars 431 approach each other and pass through the side wall 12 to connect with the stator bar 432, thereby reducing the wiring length L of the stator bar 432.

[0070] In these embodiments, the segmented stator end connections simplify the installation process and allow for a more compact shape, improving the space utilization and overall aesthetics of the current collector. Furthermore, the reduced wiring length L of the stator busbar 432 ensures that, even in space-constrained conditions, the wiring length of the stator busbar 432 can be optimized by adjusting the distance (angle) between the second ends of the two stator connection busbars 431. This guarantees sufficient space for other components or operations and reduces power transmission losses and interference. As an example, the included angle α between the lines connecting the second ends of the two stator connection busbars 431 can be 40°-60°.

[0071] In some embodiments, the connection between stator connection bar 431 and stator bar 432 may be achieved by welding or bolting to ensure the reliability and stability of the electrical connection. Furthermore, the connection may be equipped with insulating materials or protective covers to prevent external objects or impurities from contacting the electrical connection, thereby ensuring the safety and reliability of the current collector.

[0072] In some embodiments, the stator connection bar 431 includes a stator mounting bar 4311 and a stator adjusting bar 4312. The stator mounting bar 4311 is fixed to the annular plate 41 and electrically connected to the annular plate 41. One end of the stator adjusting bar 4312 is electrically connected to the stator mounting bar 4311, and the other end extends from the side wall 12 and connects to the stator bar 432. Regarding the fixing method of each stator connection bar 431, taking the stator mounting bar 4311 as an example, it can be fixed by a non-conductive connecting plate. Using a connecting plate simplifies the installation process, requiring only screw fastening tools.

[0073] In these embodiments, the second ends of the two stator connection bars 431 can be brought close to each other by the stator mounting bar 4311 and the stator adjustment bar 4312, so as to facilitate the reduction of the wiring length of the stator bar 432.

[0074] In some embodiments, the stator adjustment bar 4312 is a bent plate with a bending angle of 150°-160°, which can obtain the expected wiring length of the stator bar, and is beneficial to control the size and aesthetics of the current collector.

[0075] In some embodiments, an insulating sealing gasket is provided at the connection between the stator connection bar 431 and the side wall 12. Equipping the stator connection bar 431 with an insulating sealing gasket can improve the IP protection level of the stator connection bar 431 and prevent the intrusion of harmful substances such as dust and moisture.

[0076] In some embodiments, the annular plate is formed by splicing two arc plates or by die casting as a whole, and the most suitable annular plate can be selected for assembly according to the actual situation.

[0077] In some embodiments, the stator end connection assembly 40 includes an annular plate insulating support rod 45, which supports and fixes the annular plate 41. Specifically, the lower end of the annular plate insulating support rod 45 is fixedly connected to the support base 10, and the upper end of the annular plate insulating support rod 45 is fixed to the annular plate 41. The use of the annular plate insulating support rod 45 ensures electrical clearance and creepage distance, improving the safety of the current collector. In addition, it can also improve the stability of the annular plate 41 in the current collector, helping to prevent the annular plate 41 from shifting or deforming during operation, thus ensuring the stability and reliability of the current collector.

[0078] In some embodiments, the annular plate insulating support rod 45 is made of insulating material, which helps to electrically isolate the annular plate from other conductive components and prevent current leakage or short circuit.

[0079] In the current collector, components such as the brush assembly 42 generate heat during operation. If this heat is not dissipated in time, it can lead to overheating, performance degradation, or even damage. In some embodiments, a fan is provided on the second side of the sidewall 12, blowing air towards the first side of the sidewall 12. This ensures that the brush assembly 42 is located within the fan's airflow path, guaranteeing adequate cooling of the brush assembly 42. This prevents overheating-related malfunctions or damage, extends the lifespan of the current collector, and reduces the frequency of maintenance and component replacement. Figure 18 The image roughly shows the direction of the fan's airflow, indicating that the air is blowing from A to B.

[0080] In some embodiments, the brush assembly 42 includes a brush box 423 and a brush 424 installed in the brush box 423. One end of the brush is electrically connected to the annular plate 41, and the other end of the brush is in sliding contact with and electrically connected to the slip ring assembly 31. The brush box 423 is installed on the annular plate 41 and has an air gap 60 between it and the annular plate 41, through which the air duct can pass.

[0081] In these embodiments, the brush holder 423 is used to fix and support the brush 424, ensuring stable contact with the slip ring assembly 31 during operation. The brush holder 423 is typically made of insulating material to prevent current leakage or short circuits. Simultaneously, the brush holder 423 also needs to consider heat dissipation and ventilation requirements to ensure that the brush 424 is not damaged by overheating during operation. Evenly distributing airflow through the ventilation gap 60 effectively cools the brush 424 and brush holder 423, preventing malfunctions or damage due to overheating, extending the service life of the current collector, and reducing the frequency of maintenance and component replacement.

[0082] In some embodiments, the brush 424 is made of a material with good electrical conductivity, such as copper alloy or graphite, to ensure smooth current transmission. One end of the brush 424 is electrically connected to the annular plate 41 via a wire 425 or other connection method, while the other end slides in contact with the sliding surface of the slip ring assembly 31 and maintains a good electrical connection. Here, the connection of the wire is in the form of a maximum arc, which helps to reduce assembly stress and improve the stability and durability of the brush and the wire.

[0083] In some embodiments, multiple conductive connection structures are spaced apart along the axial direction of the rotating shaft 20 on its outer periphery, and each conductive connection structure is used to connect to a corresponding phase transmission cable. The multiple conductive connection structures spaced apart along the axial direction of the rotating shaft not only improve the stability and reliability of power transmission but also enhance the flexibility and adaptability of the system.

[0084] According to a second aspect of this application, a wind turbine generator set is provided, wherein the wind turbine generator set includes a tower, a nacelle mounted on the tower, and the aforementioned current collection device disposed in the tower, wherein the rotating shaft 20 of the current collection device is connected to the nacelle, and the support base 10 of the current collection device is fixedly connected to the tower, wherein at least one phase power transmission cable is output from the nacelle, and the rotor end connection assembly 30 of the current collection device is electrically connected to the power transmission cable, specifically, the rotor row 33 of the rotor end connection assembly 30 of the current collection device is electrically connected to the power transmission cable.

[0085] In the case of three-phase transmission cables, the conductive connection structures are staggered on the outer periphery of the rotating shaft 20. This allows each output transmission cable to be maintained independently, improving the reliability and maintainability of the entire power collection device.

[0086] Each phase of the power transmission cable has its own independent conductive connection structure for fastening and maintenance. Independent fastening and maintenance ensures that the conductive connection structures do not interfere with each other and leaves room for wrenches to facilitate subsequent maintenance work.

[0087] While the embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope thereof. However, it should be understood that, in the view of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A current collector, characterized in that, The current collection device includes: Support base (10); A rotating shaft (20) is rotatably mounted on the support base (10); At least one conductive connection structure, the conductive connection structure comprising: The rotor end connection assembly (30) includes at least one pair of parallel electric slip ring groups (31), which are fixed to the radially outer side of the rotating shaft (20) for electrically connecting the power transmission cable output from the nacelle and are able to rotate with the rotating shaft (20). The stator end connection assembly (40) is fixed on the support base (10) and located on the radial outer side of the rotor end connection assembly (30). One end of the rotor end connection assembly (40) is in sliding contact with the radial outer side of the slip ring assembly (31) for electrical connection, and the other end extends radially along the slip ring assembly (31).

2. The current collection device according to claim 1, characterized in that, The electric slip ring assembly (31) includes: A first electric slip ring (311) is provided with a first connecting lug (3111) protruding relative to its inner sidewall on the inner sidewall; The second electric slip ring (312) is located below the first electric slip ring (311). The inner sidewall of the second electric slip ring (312) is provided with a second connecting lug (3121) protruding relative to its inner sidewall. The first electric slip ring (311) and the second electric slip ring (312) are arranged in a mirror image with respect to the radial direction of the rotating shaft (20), so that the distance between the first connecting lug (3111) and the second connecting lug (3121) is limited to a preset range.

3. The current collector according to claim 2, characterized in that, The first connecting lug (3111) and the second connecting lug (3121) are staggered, and the rotor end connecting assembly (30) includes: The rotor bar (33) has a wiring port for connecting the power transmission cable; Two rotor connecting rows (34) are provided, one end of which is connected to a rotor row (33), and the other end of which is electrically connected to the first connecting lug (3111) and the second connecting lug (3121), respectively.

4. The current collector according to claim 2, characterized in that, The first slip ring (311) and the second slip ring (312) are respectively arranged at intervals on the radial outer side of the rotating shaft (20) along the axial direction. The lower end of the rotating shaft (20) is provided with a mounting flange (21), which is rotatably connected to the support base (10). The rotor end connection assembly (30) also includes a slip ring insulating support rod (32). The lower end of the slip ring insulating support rod (32) is connected to the mounting flange (21), and the upper end of the slip ring insulating support rod (32) passes through the second connecting lug (3121) and the first connecting lug (3111) in sequence to fix the first slip ring (311) and the second slip ring (312).

5. The current collector according to claim 4, characterized in that, The outer wall of the slip ring insulating support rod (32) between adjacent slip rings is provided with a skirt; and / or, the slip ring insulating support rod (32) includes a plurality of segments, each segment being connected between adjacent slip rings.

6. The current collector according to claim 2, characterized in that, The stator end connection assembly (40) includes: An annular plate (41) is fixed to the support base (10) and located radially outside the electric slip ring assembly (31), with a gap between it and the electric slip ring assembly (31); The brush assembly (42) is disposed on the annular plate (41) and slides in contact with and is electrically connected to the outer radial side of the slip ring assembly (31) to conduct the connection between the slip ring assembly (31) and the annular plate (41). The stator end conductive plate (43) is connected to the radial outer side of the annular plate (41) and extends outward.

7. The current collector according to claim 6, characterized in that, The brush assembly (42) includes a plurality of first brushes (421) disposed on the upper surface of the annular plate (41) and a plurality of second brushes (422) disposed on the lower surface of the annular plate (41), wherein the plurality of first brushes (421) are in contact with the first slip ring (311) respectively, and the plurality of second brushes (422) are in contact with the second slip ring (312) respectively.

8. The current collector according to claim 6, characterized in that, The support base (10) includes a bottom wall (11) and a side wall (12), the rotating shaft (20) is disposed on the bottom wall (11), the rotor end connecting assembly (30) is located on the first side of the side wall (12), and the stator end conductive plate (43) includes: A stator connection bar (431) is disposed on the first side of the side wall (12) and is fixed and electrically connected to the annular plate (41); A stator bar (432) is disposed on the second side of the side wall (12), and the stator connection bar (431) has an output interface for use as a terminal for the transmission cable inside the tower. The stator connection bar (431) can be electrically connected to the stator connection bar (431) by passing through the first side of the sidewall (12) to the second side of the sidewall (12).

9. The current collector according to claim 8, characterized in that, There are two stator end conductive plates (43), which are spaced apart on opposite sides of the annular plate (41). Each stator end conductive plate (43) includes two stator connection bars (431). The first end of the two stator connection bars (431) is connected to the edge of one side of the annular plate (41), and the second end of the two stator connection bars (431) is close to each other and passes through the side wall (12) to connect with the stator bar (432), thereby reducing the wiring length of the stator bar (432).

10. The current collector according to claim 9, characterized in that, The stator connection bar (431) includes: The stator mounting bar (4311) is fixed on the annular plate (41) and electrically connected to the annular plate (41); The stator adjustment bar (4312) is electrically connected at one end to the stator mounting bar (4311) and extends out from the side wall (12) to be connected to the stator bar (432).

11. The current collector according to claim 10, characterized in that, The stator adjustment bar (4312) is a bent plate with a bending angle of 150°-160°.

12. The current collector according to claim 8, characterized in that, An insulating sealing gasket is provided at the connection between the stator connecting bar (431) and the side wall (12).

13. The current collector according to claim 6, characterized in that, The annular plate is formed by splicing two arc-shaped plates or by integral die casting; and / or, the stator end connection assembly (40) includes: An annular plate insulating support rod (45) is provided, with its lower end fixedly connected to the support base (10) and its upper end fixedly connected to the annular plate (41).

14. The current collector according to claim 8, characterized in that, A fan is provided on the second side of the sidewall (12), and the fan can blow air to the first side of the sidewall (12), so that the brush assembly (42) is located in the air duct of the fan.

15. The current collector according to claim 14, characterized in that, The brush assembly (42) includes a brush box (423) and brushes (424) installed in the brush box (423). One end of the brush is electrically connected to the annular plate (41), and the other end of the brush is in sliding contact with and electrically connected to the slip ring assembly (31). The brush box (423) is installed on the annular plate (41) and has an air gap (60) between it and the annular plate (41). The air duct can pass through the air gap (60).

16. The current collector according to any one of claims 1 to 15, characterized in that, The conductive connection structure is multiple and is arranged at intervals on the outer periphery of the rotating shaft (20) along the axial direction of the rotating shaft (20). Each conductive connection structure is used to connect to a phase power transmission cable.

17. A wind turbine generator set, characterized in that, The wind turbine generator set includes a tower, a nacelle mounted on the tower, and a power collection device according to any one of claims 1 to 16 disposed in the tower, wherein the rotating shaft (20) of the power collection device is connected to the nacelle, the support base (10) of the power collection device is fixedly connected to the tower, and the rotor end connection assembly (30) of the power collection device is electrically connected to at least one phase power transmission cable output from the nacelle.

Images