Coaxial equalization type hub built-in wind power variable pitch control cabinet

Abstract

This application provides a coaxial balanced hub-mounted wind turbine pitch control cabinet, belonging to the field of wind power generation equipment technology. Specifically, it includes a cabinet body, a positioning and mounting assembly, a central control assembly, three sets of drive assemblies, three sets of backup power supply assemblies, three sets of auxiliary electrical assemblies, and a door panel assembly. The central control assembly is located in the central mounting area of ​​the cabinet body, while the three sets of drive assemblies, three sets of backup power supply assemblies, and three sets of auxiliary electrical assemblies are evenly arranged circumferentially along the cabinet body. The beneficial effect of this application is that the weight distribution of the main components inside and outside the cabinet body is closer to a circumferentially balanced state, which can reduce the offset of the overall center of gravity of the control cabinet relative to the rotation center of the hub, thereby reducing the eccentric load and additional vibration generated during the rotation of the control cabinet with the hub, and improving the installation stability and operational reliability of the control cabinet.

Description

Technical Field

[0001] This application belongs to the field of wind power equipment technology, specifically relating to a coaxial balanced hub-mounted wind power pitch control cabinet. Background Technology

[0002] The wind turbine pitch control cabinet is an important component of the wind turbine pitch system. It is typically used to install the pitch controller, main drive, backup power supply, communication module, and related electrical components to achieve functions such as pitch angle adjustment, safe feathering, and condition monitoring. Since the pitch control cabinet is usually located inside the wind turbine hub and rotates with the hub, its structural layout not only affects the reliability of pitch control but also directly relates to the stress stability during hub rotation.

[0003] Existing wind turbine pitch control cabinets typically include a cabinet body, mounting brackets, a door, and multiple installation areas located inside or around the cabinet. Multiple main drives are arranged corresponding to the three blade shafts. Backup power supplies, control modules, wiring terminals, lighting components, and other auxiliary electrical components are installed in different locations within the cabinet. Each component is connected to the corresponding pitch actuator or control system via cables. The entire cabinet is fixed inside the wheel hub by brackets.

[0004] However, due to the large weight of components such as the main drive and backup power supply, if their installation positions are unevenly distributed, the overall center of gravity of the control cabinet may deviate from the center of rotation of the hub, generating eccentric loads and additional vibrations during the rotation of the hub. After long-term operation, this may cause fatigue at the cabinet connection points, loosening of fasteners, and a decrease in the reliability of electrical connections. Summary of the Invention

[0005] This application addresses the problem of uneven weight distribution within existing wind turbine pitch control cabinets, which easily leads to eccentric loads and additional vibrations when the cabinet rotates with the hub. It provides a coaxial balanced hub-integrated wind turbine pitch control cabinet, which arranges the internal components of the cabinet evenly around the rotation center, reducing eccentric loads and additional vibrations during rotation and improving the operational stability of the control cabinet.

[0006] To solve the above problems, the technical solution adopted in this application is a coaxial balanced hub-integrated wind turbine pitch control cabinet, including a cabinet body, a positioning and installation component, a central control component, three sets of drive components, three sets of backup power components, three sets of auxiliary electrical components, and a door panel component.

[0007] The cabinet body has a symmetrical box structure, and its top-view outer contour is a regular hexagon. The positioning and mounting components are fixed to the bottom of the cabinet body, and the geometric center of the positioning and mounting components coincides with the geometric center of the cabinet body in the top-view direction. The positioning and mounting components are used for concentric fixed connection with the wind turbine hub. The cabinet body has a central mounting area and circumferential mounting areas surrounding the central mounting area. The central control component is fixed to the central mounting area. Three sets of drive components and three sets of backup power components are all fixed within the circumferential mounting areas. The three sets of drive components are... Each of the three blade shafts of the wind turbine pitch control system has three sets of backup power supply components, which are respectively set and electrically connected to the three sets of drive components. The three sets of drive components are arranged at equal angular intervals along the circumference of the cabinet body, and the three sets of backup power supply components are arranged at equal angular intervals along the circumference of the cabinet body. The drive components and backup power supply components are staggered along the circumference of the cabinet body. The three sets of auxiliary electrical components are fixed to the outer wall of the cabinet body and are arranged at equal angular intervals along the circumference of the cabinet body. The cabinet body has an inspection opening, and the door panel assembly is detachably covered by the inspection opening.

[0008] In this technical solution, compared with the prior art, the cabinet body of this application adopts a symmetrical box structure, and its top-view outer contour is a regular hexagon. The geometric center of the positioning and mounting components coincides with the geometric center of the cabinet body in the top-view direction, so that the cabinet body can obtain a better centering foundation after being installed in the hub. The central control component is set in the central mounting area of ​​the cabinet body, avoiding the placement of a separately set control component off to one side of the cabinet. Three sets of drive components, three sets of backup power components, and three sets of auxiliary electrical components are arranged at equal angular intervals along the circumference of the cabinet body, so that the heavier drive components, backup power components, and outer auxiliary electrical components are evenly distributed around the geometric center of the cabinet body. As a result, the weight distribution of the main components inside and outside the cabinet body is closer to a circumferentially balanced state, which can reduce the offset of the overall center of gravity of the control cabinet relative to the rotation center of the hub, thereby reducing the eccentric load and additional vibration generated by the control cabinet during the rotation of the hub, and improving the installation stability and operational reliability of the control cabinet.

[0009] Furthermore, the cabinet body contains three bent partitions, which are arranged at equal angles along the circumference of the cabinet body. Each of the three bent partitions corresponds to one of the three sets of backup power components. The two ends of each bent partition are fixedly connected to the inner wall of the cabinet body, and each bent partition and the inner wall of the cabinet body form a power receiving cavity, in which the corresponding backup power component is fixed. The three sets of backup power components can be independently arranged in their respective power receiving cavities and evenly distributed along the circumference of the cabinet body with the three bent partitions. This helps to evenly distribute the weight of the backup power components around the cabinet body, reducing the center of gravity shift caused by concentrated arrangement on one side. At the same time, the power receiving cavity, formed by the bent partitions and the inner wall of the cabinet body, allows the backup power components to form a relatively independent installation space from other electrical components in the circumferential installation area, improving the clarity of the functional zoning within the cabinet.

[0010] Furthermore, each bent partition is V-shaped in plan view, and the distance between the bent portion of the three partitions and the geometric center of the cabinet body is equal. The bent partitions are sandwich panel structures filled with thermal insulation cotton. The consistent shape and position of the three bent partitions ensure that the three power supply cavities are regularly and symmetrically distributed within the cabinet body, which helps improve the consistency of the backup power supply component installation position and further improves the balance of weight distribution within the cabinet body. At the same time, the sandwich panel structure and thermal insulation cotton filling of the bent partitions improve the thermal insulation between the power supply cavities and adjacent installation areas, reducing the thermal impact of the backup power supply components on adjacent electrical components during operation.

[0011] Furthermore, a reinforcing frame is fixed to the bottom of the cabinet body, and a support cylinder is fixed at the center of the inner bottom of the cabinet body. The support cylinder extends along the height of the cabinet body, and three bent support rods are fixed to the top of the support cylinder. The three bent support rods are arranged at equal angles along the circumference of the support cylinder. One end of each bent support rod is fixedly connected to the top of the support cylinder, and the other end is fixedly connected to the inner wall of the cabinet body. The bent parts of the three bent support rods are respectively opposite to the bent parts of the three bent partitions in the top view. The support cylinder is located at the center of the cabinet body, and the three bent support rods extend evenly from the support cylinder towards the inner wall of the cabinet body, forming a circumferentially balanced support structure inside the cabinet body, improving the overall structural strength and deformation resistance of the cabinet body. The bending parts of the bent support rods are opposite to the bending parts of the bent partitions, so that the internal support structure and the backup power isolation structure correspond to each other in space, which helps to improve the regularity of the internal structural layout and the balance of force.

[0012] Furthermore, a docking hole is provided at the bottom of the cabinet body, which is vertically aligned with and connected to the inner hole of the support cylinder; a lead-in hole is provided on the side wall of the support cylinder. External cables can enter the inner hole of the support cylinder through the docking hole and be introduced into the central mounting area of ​​the cabinet body through the lead-in hole on the side wall of the support cylinder. This allows the cables to directly enter the area where the central control components are located, reducing the cross-area detours and redundant wiring of cables inside the cabinet. At the same time, the vertical alignment and connection between the docking hole and the inner hole of the support cylinder makes the cable entry point closer to the center of the cabinet body, which helps to reduce the impact of the offset cable arrangement on the internal space and weight distribution of the cabinet.

[0013] Furthermore, the access panel includes three partition openings, and the door panel assembly includes three doors, each corresponding to one of the three partition openings. In a top-down view, each partition opening is defined by two adjacent bent support rods and the corresponding side wall of the cabinet body. Each door is detachably fitted onto its corresponding partition opening, and each door is equipped with a handle. The three partition openings and three doors are arranged circumferentially along the cabinet body, ensuring even weight distribution across the cabinet body and preventing uneven weight distribution caused by doors concentrated on one side. Simultaneously, each door corresponds to a partition opening, facilitating partitioned opening and maintenance of different circumferential areas within the cabinet body. The handles facilitate door disassembly and assembly, improving the convenience of maintenance operations.

[0014] Furthermore, the positioning and mounting assembly includes three connecting beams. These three beams are arranged at equal angular intervals along the circumference of the cabinet body and are fixed to the bottom of the cabinet body. Each connecting beam has mounting holes at both ends. The three connecting beams form a circumferentially balanced mounting support structure at the bottom of the cabinet body, allowing the cabinet body to connect to the mounting base inside the hub through multiple mounting holes, thus improving the positioning stability of the cabinet body after installation. The equal angular intervals along the circumference of the three connecting beams help to distribute the installation force of the cabinet body evenly around its geometric center, reducing localized stress concentration and thereby improving the fixation reliability of the control cabinet when it rotates with the hub.

[0015] Furthermore, the three sets of auxiliary electrical components correspond one-to-one with the three sets of drive components in the circumferential direction of the cabinet body. Each set of auxiliary electrical components includes a braking resistor assembly and a maintenance lighting assembly, both of which are fixed to the outer wall of the cabinet body. The braking resistor assembly and maintenance lighting assembly, as auxiliary electrical components, can be arranged circumferentially with the three sets of drive components, preventing the weight of the auxiliary electrical components from being concentrated in a single area of ​​the cabinet body, thus helping to maintain a balanced weight distribution around the cabinet body. Simultaneously, fixing the braking resistor assembly and maintenance lighting assembly to the outer wall of the cabinet body reduces the internal installation space they occupy and facilitates maintenance and replacement from the outside of the cabinet.

[0016] Furthermore, it also includes three sets of lifting assemblies, each corresponding one-to-one with one of the three sets of backup power supply assemblies on the circumference of the cabinet body. The three sets of lifting assemblies are arranged at equal angular intervals along the circumference of the cabinet body, and the lifting assemblies and auxiliary electrical assemblies are staggered along the circumference of the cabinet body. Each set of lifting assemblies includes a support plate, several reinforcing ribs, and lifting rings. The support plate is fixed to the outer wall of the cabinet body, the reinforcing ribs connect the support plate to the outer wall of the cabinet body, and the lifting rings are fixed to the top of the support plate. The three sets of lifting assemblies are evenly distributed along the circumference of the cabinet body, enabling multi-point balanced force distribution during lifting and reducing torsional deformation caused by single-point or offset lifting. The staggered arrangement of the lifting assemblies and auxiliary electrical assemblies along the circumference helps avoid concentrated stacking of outer components in the same circumferential position, resulting in a more balanced external structure and weight distribution of the cabinet body. The reinforcing ribs enhance the connection strength between the support plate and the cabinet body, improving the structural reliability when the lifting rings bear load.

[0017] Furthermore, a high-temperature resistant heat-insulating pad is sandwiched between the braking resistor assembly and the outer wall of the cabinet body; a heat dissipation window is provided on the outer wall of the cabinet body, and the heat dissipation window is connected to the power supply cavity. The high-temperature resistant heat-insulating pad, located between the braking resistor assembly and the outer wall of the cabinet body, can reduce the heat transferred from the braking resistor assembly to the cabinet body during operation; the heat dissipation window, connected to the power supply cavity, provides a heat dissipation channel for the power supply cavity to connect with the outside of the cabinet body, which helps to reduce heat accumulation in the area where the backup power supply assembly is located and improves the working environment of the electrical components inside the cabinet body.

[0018] As can be seen from the above technical solutions, this application has the following advantages:

[0019] 1. By setting the cabinet body as a symmetrical box structure and aligning the geometric center of the positioning and mounting components with the geometric center of the cabinet body in the top view, it is beneficial to improve the centering stability of the control cabinet after installation and reduce the eccentric load generated when the hub rotates.

[0020] 2. The central control component is placed in the central installation area, and the three sets of drive components, three sets of backup power components, and three sets of auxiliary electrical components are evenly arranged around the circumference of the cabinet body. This helps to distribute the weight of the main internal and external components of the cabinet body evenly around the geometric center of the cabinet body, reduce additional vibration, and improve operational stability.

[0021] 3. By bending the partition and forming a power supply cavity with the inner wall of the cabinet body, the three sets of backup power components are arranged independently and evenly in the corresponding power supply cavity, which not only improves the weight distribution inside the cabinet, but also enhances the clarity of functional zoning.

[0022] 4. A support cylinder and three bent support rods are installed inside the cabinet body to form a circumferentially balanced internal support structure, which helps to improve the overall structural strength and deformation resistance of the cabinet body.

[0023] 5. Through the central cable lead structure, the circumferentially distributed doors, connecting beams and hoisting components, the cable entry, inspection openings, installation forces and hoisting forces are evenly distributed around the cabinet body, which helps to improve the assembly reliability and maintenance convenience of the control cabinet.

[0024] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application are realized and obtained through the structures particularly pointed out in the description, claims and drawings.

[0025] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a structural diagram illustrating a specific embodiment of this application.

[0028] Figure 2 This is a top view schematic diagram of a specific embodiment of this application.

[0029] Figure 3 This is a bottom view of a specific embodiment of this application.

[0030] Figure 4 This is an internal schematic diagram of a specific embodiment of this application.

[0031] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle.

[0032] Figure 6 This is a schematic diagram of the braking resistor assembly in a specific embodiment of this application.

[0033] In the diagram: 1. Cabinet body; 11. Inspection opening; 12. Bending partition; 13. Power supply cavity; 14. Reinforcing frame; 15. Support cylinder; 16. Bending support rod; 17. Docking hole; 18. Lead wire hole; 19. Ventilation window; 2. Positioning and mounting components; 21. Connecting beam; 22. Mounting hole; 3. Drive components; 4. Backup power components; 5. Auxiliary electrical components; 51. Braking resistor components; 52. Inspection lighting components; 53. High-temperature heat-resistant insulation pad; 6. Door panel components; 61. Door body; 7. Lifting components; 71. Support plate; 72. Reinforcing rib; 73. Lifting ring. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Example 1: This example provides a coaxial balanced hub-mounted wind turbine pitch control cabinet, such as... Figure 1-3 As shown, the system includes a cabinet body 1, a positioning and mounting assembly 2, a central control assembly, three sets of drive assemblies 3, three sets of backup power supply assemblies 4, three sets of auxiliary electrical assemblies 5, and a door panel assembly 6. The central control assembly, drive assembly 3, and backup power supply assembly 4 can all be conventional equipment in this field; their specific electrical structures and control principles will not be detailed here.

[0036] The cabinet body 1 is a symmetrical box structure, and its top-view outer contour is a regular hexagon. The positioning and mounting assembly 2 is fixed to the bottom of the cabinet body 1, and the geometric center of the positioning and mounting assembly 2 coincides with the geometric center of the cabinet body 1 in the top-view direction. The positioning and mounting assembly 2 is used for concentric fixed connection with the wind turbine hub. Therefore, the cabinet body 1 can use its geometric center as the overall layout reference, facilitating a more balanced installation state after the cabinet body 1 is installed inside the hub.

[0037] like Figure 4As shown, the cabinet body 1 has a central mounting area and a circumferential mounting area surrounding the central mounting area. To facilitate the display of the internal structure of the cabinet body, the central control component is not specifically shown in the attached diagram. The central control component is fixed within the central mounting area, while the three sets of drive components 3 and three sets of backup power components 4 are all fixed within the circumferential mounting areas. The three sets of drive components 3 correspond to the three blade shafts of the wind turbine pitch control system, and the three sets of backup power components 4 are correspondingly and electrically connected to the three sets of drive components 3. The three sets of drive components 3 are arranged at equal angular intervals along the circumference of the cabinet body 1, and the three sets of backup power components 4 are also arranged at equal angular intervals along the circumference of the cabinet body 1, with the drive components 3 and backup power components 4 staggered along the circumference of the cabinet body 1. Three sets of auxiliary electrical components 5 are fixed to the outer wall of the cabinet body 1 and arranged at equal angular intervals along the circumference of the cabinet body 1.

[0038] like Figure 5 As shown, the cabinet body 1 has three bent partitions 12 arranged at equal angles along the circumference of the cabinet body 1, and each of the three bent partitions 12 corresponds to one of the three sets of backup power components 4. Both ends of each bent partition 12 are fixedly connected to the inner wall of the cabinet body 1, and each bent partition 12 and the inner wall of the cabinet body 1 form a power receiving cavity 13, in which the corresponding backup power component 4 is fixed. Through this structure, the three sets of backup power components 4 are located in their respective power receiving cavities 13, and the three power receiving cavities 13 are distributed along the circumference of the cabinet body 1.

[0039] Each bent partition 12 is V-shaped in plan view, and the distance between the bent portion of the three bent partitions 12 and the geometric center of the cabinet body 1 is equal. The bent partition 12 is a sandwich panel structure filled with heat insulation cotton. Each bent partition 12 is seamlessly connected to the bottom of the cabinet body 1, and a metal connecting reinforcement is added at this connection point to improve the connection stability between the bent partition 12 and the cabinet body 1, and to make the power supply cavity 13 a relatively independent space relative to other areas inside the cabinet body 1.

[0040] A reinforcing frame 14 is fixed to the bottom of the cabinet body 1. The reinforcing frame 14 has a triangular structure. A support cylinder 15 is fixed at the center of the inner bottom of the cabinet body 1, extending along the height direction of the cabinet body 1. Three bent support rods 16 are fixed to the top of the support cylinder 15, and the three bent support rods 16 are arranged at equal angles along the circumference of the support cylinder 15. One end of each bent support rod 16 is fixedly connected to the top of the support cylinder 15, and the other end is fixedly connected to the inner side wall of the cabinet body 1. The bent parts of the three bent support rods 16 are respectively opposite to the bent parts of the three bent partitions 12 in the top view. Thus, the support cylinder 15 and the three bent support rods 16 form a support structure extending from the center to the outer periphery inside the cabinet body 1, and correspond to the positions of the bent partitions 12.

[0041] The bottom of the cabinet body 1 has a docking hole 17, which is vertically aligned with and connected to the inner hole of the support cylinder 15. The side wall of the support cylinder 15 has a lead-in hole 18. External cables can enter the inner hole of the support cylinder 15 through the docking hole 17 and then be introduced into the central mounting area of ​​the cabinet body 1 through the lead-in hole 18 on the side wall of the support cylinder 15. This allows the cables to directly enter the area where the central control component is located, reducing the need for cables to travel across areas inside the cabinet body 1.

[0042] The cabinet body 1 has an access opening 11 located at the top. A door panel assembly 6 is detachably mounted on the access opening 11. Specifically, the access opening 11 includes three partition openings, and the door panel assembly 6 includes three doors 61, each corresponding to one of the three partition openings. In a top-down view, each partition opening is defined by two adjacent bent support rods 16 and the corresponding side wall of the cabinet body 1. Each door 61 is detachably mounted on its corresponding partition opening, and each door 61 is equipped with a handle. By removing the corresponding door 61, the corresponding partition opening can be opened for inspection of the corresponding area inside the cabinet body 1.

[0043] The positioning and mounting assembly 2 includes three connecting beams 21, which are arranged at equal angular intervals along the circumference of the cabinet body 1. The three connecting beams 21 are fixed to the bottom of the cabinet body 1, and each connecting beam 21 has mounting holes 22 at both ends. Bolts are inserted into the mounting holes 22 for fixed connection with the wheel hub. Through this structure, the cabinet body 1 can be fixedly connected to the wheel hub via the three connecting beams 21.

[0044] Three sets of auxiliary electrical components 5 correspond one-to-one with three sets of drive components 3 on the circumference of the cabinet body 1, and the three sets of auxiliary electrical components 5 are arranged at equal angular intervals along the circumference of the cabinet body 1. Each set of auxiliary electrical components 5 includes a braking resistor component 51 and a maintenance lighting component 52, both of which are fixed to the outer side wall of the cabinet body 1. The braking resistor component 51 and the maintenance lighting component 52 can be conventional equipment in the art, and their specific structures and working principles will not be described in detail here. In some embodiments, the side wall of the cabinet body 1 also has three connection holes, each corresponding to one of the three sets of drive components 3, for cables to pass through.

[0045] This embodiment also includes three sets of hoisting assemblies 7, which correspond one-to-one with three sets of backup power supply assemblies 4 on the circumference of the cabinet body 1. The three sets of hoisting assemblies 7 are arranged at equal angular intervals along the circumference of the cabinet body 1, and the hoisting assemblies 7 and auxiliary electrical assemblies 5 are staggered along the circumference of the cabinet body 1. Each set of hoisting assemblies 7 includes a support plate 71, several reinforcing ribs 72, and a lifting ring 73. The support plate 71 is fixed to the outer wall of the cabinet body 1, the several reinforcing ribs 72 are connected between the support plate 71 and the outer wall of the cabinet body 1, and the lifting ring 73 is fixed to the top of the support plate 71. The lifting ring 73 can be connected to external hoisting equipment, and the reinforcing ribs 72 can improve the connection strength between the support plate 71 and the cabinet body 1.

[0046] like Figure 6 As shown, a high-temperature resistant heat-insulating pad 53 is sandwiched between the braking resistor assembly 51 and the outer wall of the cabinet body 1. The high-temperature resistant heat-insulating pad 53 includes a heat-insulating pad sheet and a heat-insulating pad block. The heat-insulating pad sheet is in close contact with the outer wall of the braking resistor assembly 51, and one side of the heat-insulating pad block is in close contact with the heat-insulating pad sheet, while the other side is in close contact with the outer wall of the cabinet body 1. A heat dissipation window 19 is provided on the outer wall of the cabinet body 1, and the heat dissipation window 19 communicates with the power supply accommodating cavity 13. Through the above structure, a heat-insulating gap is formed between the braking resistor assembly 51 and the cabinet body 1, and the power supply accommodating cavity 13 can communicate with the outside of the cabinet body 1 through the heat dissipation window 19.

[0047] Example 2: This example further explains the working principle of Example 1.

[0048] This application is installed inside the hub of a wind turbine. The cabinet body 1 is fixedly connected to the hub via the positioning and mounting assembly 2 and rotates synchronously with the hub. The cabinet body 1 has a symmetrical box structure, and its top-view outer contour is a regular hexagon. The geometric center of the positioning and mounting assembly 2 coincides with the geometric center of the cabinet body 1 in the top-view direction. Therefore, after the cabinet body 1 is installed inside the hub, it can obtain a good centering foundation.

[0049] Inside the cabinet body 1, the central control component is fixed in the central mounting area, while three sets of drive components 3 and three sets of backup power components 4 are fixed in the circumferential mounting area. The three sets of drive components 3 are arranged at equal angular intervals along the circumference of the cabinet body 1, and the three sets of backup power components 4 are arranged at equal angular intervals along the circumference of the cabinet body 1, with the drive components 3 and backup power components 4 staggered along the circumference of the cabinet body 1. Three sets of auxiliary electrical components 5 are fixed to the outer wall of the cabinet body 1 and arranged at equal angular intervals along the circumference of the cabinet body 1. Thus, the main components inside and outside the cabinet body 1 can be evenly arranged around the geometric center of the cabinet body 1.

[0050] When the hub drives the cabinet body 1 to rotate, the central control component is located in the central installation area. The three sets of drive components 3, the three sets of backup power components 4, and the three sets of auxiliary electrical components 5 are evenly distributed along the circumference of the cabinet body 1. This can reduce the offset of the overall center of gravity of the cabinet body 1 relative to the rotation center of the hub, thereby reducing the eccentric load and additional vibration generated during rotation and improving the stability of the control cabinet when running with the hub.

[0051] Three sets of backup power supply components 4 are fixed in three power supply accommodating cavities 13, which are formed by three bent partitions 12 and the inner sidewall of the cabinet body 1. Since the three bent partitions 12 are arranged at equal angular intervals along the circumference of the cabinet body 1, and the distance between the bent part of the three bent partitions 12 and the geometric center of the cabinet body 1 is equal, the positions of the three power supply accommodating cavities 13 are well consistent, allowing the three sets of backup power supply components 4 to be evenly distributed within the cabinet body 1.

[0052] The support cylinder 15 is fixed at the center of the inner bottom of the cabinet body 1. Three bent support rods 16 are arranged at equal angles along the circumference of the support cylinder 15 and are respectively connected to the inner sidewall of the cabinet body 1. Thus, the support cylinder 15 and the three bent support rods 16 form a balanced support structure inside the cabinet body 1, which helps to improve the overall strength of the cabinet body 1 and reduce the possibility of local deformation of the cabinet body 1 under assembly or rotational vibration conditions.

[0053] External cables enter the inner hole of the support cylinder 15 through the docking hole 17 at the bottom of the cabinet body 1, and then enter the central mounting area of ​​the cabinet body 1 through the lead hole 18 on the side wall of the support cylinder 15, where they connect to the central control component. Since the docking hole 17, the support cylinder 15, and the lead hole 18 are all corresponding to the central mounting area, external cables can be directly introduced into the central mounting area, thereby reducing the need for cables to travel across areas inside the cabinet body 1.

[0054] When maintenance is required, the operator can remove the corresponding door 61 by using the handle to open the corresponding partition opening, thereby allowing maintenance of the components in the corresponding area inside the cabinet body 1. After maintenance is completed, the door 61 is replaced and placed back on the corresponding partition opening to seal the maintenance opening 11.

[0055] The braking resistor assembly 51 is fixed to the outer wall of the cabinet body 1, and a high-temperature resistant heat-insulating pad 53 is sandwiched between the braking resistor assembly 51 and the outer wall of the cabinet body 1. The heat generated by the braking resistor assembly 51 during operation can form a heat insulation gap between it and the cabinet body 1 through the high-temperature resistant heat-insulating pad 53, reducing the transfer of heat to the cabinet body 1. The power supply cavity 13 is connected to the outside of the cabinet body 1 through the heat dissipation window 19, so that the heat inside the power supply cavity 13 can be dissipated to the outside of the cabinet body 1 through the heat dissipation window 19.

[0056] During the hoisting process, the external hoisting equipment is connected to the lifting rings 73 of the three sets of hoisting components 7. Since the three sets of hoisting components 7 are arranged at equal angular intervals along the circumference of the cabinet body 1, the hoisting force can be distributed at different circumferential positions of the cabinet body 1, thereby reducing the deformation of the cabinet body 1 caused by unilateral force or offset hoisting.

[0057] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A coaxial balanced hub-mounted wind turbine pitch control cabinet, characterized in that, It includes the cabinet body (1), positioning and installation components (2), central control components, three sets of drive components (3), three sets of backup power components (4), three sets of auxiliary electrical components (5) and door panel components (6). The cabinet body (1) is a symmetrical box structure. The top view of the cabinet body (1) is a regular hexagon. The positioning and mounting component (2) is fixed to the bottom of the cabinet body (1), and the geometric center of the positioning and mounting component (2) coincides with the geometric center of the cabinet body (1) in the top view direction. The positioning and mounting component (2) is used to be concentrically fixed to the wind turbine hub. The cabinet body (1) is provided with a central mounting area and a circumferential mounting area around the central mounting area. The central control component is fixed in the central mounting area. The three sets of drive components (3) and the three sets of backup power components (4) are all fixed in the circumferential mounting area. The three sets of drive components (3) correspond to the wind turbine pitch system. The three blade shafts, the three sets of backup power components (4) are respectively set and electrically connected to the three sets of drive components (3); the three sets of drive components (3) are arranged at equal angles along the circumference of the cabinet body (1), the three sets of backup power components (4) are arranged at equal angles along the circumference of the cabinet body (1), and the drive components (3) and the backup power components (4) are arranged in a staggered manner along the circumference of the cabinet body (1); the three sets of auxiliary electrical components (5) are fixed to the outer side wall of the cabinet body (1) and are arranged at equal angles along the circumference of the cabinet body (1); the cabinet body (1) has an inspection opening (11), and the door panel component (6) is detachably covered on the inspection opening (11).

2. The coaxial balanced hub-mounted wind turbine pitch control cabinet according to claim 1, characterized in that, The cabinet body (1) is provided with three bent partitions (12). The three bent partitions (12) are arranged at equal angles along the circumference of the cabinet body (1). The three bent partitions (12) correspond one-to-one with the three sets of backup power components (4). The two ends of each bent partition (12) are fixedly connected to the inner sidewall of the cabinet body (1), and each bent partition (12) and the inner sidewall of the cabinet body (1) form a power receiving cavity (13). The corresponding backup power component (4) is fixed in the power receiving cavity (13).

3. The coaxial balanced hub-mounted wind turbine pitch control cabinet according to claim 2, characterized in that, Each of the bent partitions (12) is V-shaped in the top view, and the distance between the bent portion of the three bent partitions (12) and the geometric center of the cabinet body (1) is equal; the bent partition (12) is a sandwich panel structure, and the sandwich panel structure is filled with heat insulation cotton.

4. The coaxial balanced hub-mounted wind turbine pitch control cabinet according to claim 3, characterized in that, A reinforcing frame (14) is fixed to the bottom of the cabinet body (1). A support cylinder (15) is fixed to the center of the inner bottom of the cabinet body (1). The support cylinder (15) extends along the height direction of the cabinet body (1). Three bent support rods (16) are fixed to the top of the support cylinder (15). The three bent support rods (16) are arranged at equal angles along the circumference of the support cylinder (15). One end of each bent support rod (16) is fixedly connected to the top of the support cylinder (15), and the other end is fixedly connected to the inner side wall of the cabinet body (1). The bent parts of the three bent support rods (16) are respectively opposite to the bent parts of the three bent partitions (12) in the top view direction.

5. The coaxial balanced hub-mounted wind turbine pitch control cabinet according to claim 4, characterized in that, The bottom of the cabinet body (1) is provided with a docking hole (17), which is vertically opposite to and connected to the inner hole of the support cylinder (15); the side wall of the support cylinder (15) is provided with a lead wire hole (18).

6. The coaxial balanced hub-mounted wind turbine pitch control cabinet according to claim 4, characterized in that, The inspection opening (11) includes three partition openings, and the door panel assembly (6) includes three door bodies (61). The three door bodies (61) correspond one-to-one with the three partition openings. In the top view, each partition opening is defined by two adjacent bent support rods (16) and the corresponding side wall of the cabinet body (1). Each door body (61) is detachably covered by the corresponding partition opening, and each door body (61) is equipped with a handle.

7. The coaxial balanced hub-mounted wind turbine pitch control cabinet according to claim 1, characterized in that, The positioning and installation component (2) includes three connecting beams (21). The three connecting beams (21) are arranged at equal angles along the circumference of the cabinet body (1). The three connecting beams (21) are fixed to the bottom of the cabinet body (1). Each connecting beam (21) has a mounting hole (22) at both ends.

8. The coaxial balanced hub-mounted wind turbine pitch control cabinet according to claim 2, characterized in that, The three sets of auxiliary electrical components (5) correspond one-to-one with the three sets of drive components (3) on the circumferential direction of the cabinet body (1); each set of auxiliary electrical components (5) includes a braking resistor component (51) and a maintenance lighting component (52), and the braking resistor component (51) and the maintenance lighting component (52) are fixed to the outer side wall of the cabinet body (1).

9. The coaxial balanced hub-mounted wind turbine pitch control cabinet according to claim 8, characterized in that, It also includes three sets of hoisting assemblies (7), each of which corresponds to one of the three sets of backup power supply assemblies (4) on the circumference of the cabinet body (1). The three sets of hoisting assemblies (7) are arranged at equal angles along the circumference of the cabinet body (1), and the hoisting assemblies (7) and the auxiliary electrical assemblies (5) are arranged in a staggered manner along the circumference of the cabinet body (1). Each set of hoisting assemblies (7) includes a support plate (71), several reinforcing ribs (72) and a lifting ring (73). The support plate (71) is fixed to the outer wall of the cabinet body (1), the several reinforcing ribs (72) are connected between the support plate (71) and the outer wall of the cabinet body (1), and the lifting ring (73) is fixed to the top of the support plate (71).

10. The coaxial balanced hub-mounted wind turbine pitch control cabinet according to claim 8, characterized in that, A high-temperature resistant heat insulation pad (53) is sandwiched between the braking resistor assembly (51) and the outer side wall of the cabinet body (1); a heat dissipation window (19) is opened on the outer side wall of the cabinet body (1), and the heat dissipation window (19) is connected to the power supply accommodating cavity (13).

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