Wind turbine generator system

Abstract

The embodiment of the application provides a wind turbine, and relates to the field of wind power generation.The wind turbine comprises a nacelle, a generator, a hub and a main frame, the nacelle, the generator and the hub are sequentially arranged, the hub is directly connected with the generator, the main frame is arranged in the nacelle, the main frame is connected with the generator, and the main frame is a hollow structure.In this way, the direct connection design can omit various transmission components in the prior art, so that the device distribution is more compact.In addition, the main frame adopts a hollow design, more devices can be arranged in the main frame, so that the device distribution of the whole nacelle is more compact, and the movable space of an operator can be increased.

Description

Technical Field

[0001] This invention relates to the field of wind power generation, and more specifically, to a wind turbine generator set. Background Technology

[0002] With the rapid development of wind power technology, wind turbine generators have become an important part of the renewable energy sector. A typical wind turbine generator includes a rotor system, a generator, and a nacelle. The rotor system captures wind energy and converts it into mechanical energy, while the generator converts that mechanical energy into electrical energy.

[0003] In existing technologies, the layout of the cabin is unreasonable, resulting in a compact space and limited room for operators to move around. Summary of the Invention

[0004] This invention provides a wind turbine generator set with a reasonable internal layout, compact component distribution, and a large operating space for operators.

[0005] The embodiments of the present invention can be implemented as follows: An embodiment of the present invention provides a wind turbine generator set, which includes a nacelle, a generator, a hub, and a main frame. The nacelle, the generator, and the hub are arranged sequentially. The hub is directly connected to the generator. The main frame is disposed inside the nacelle and connected to the generator. The main frame has a hollow structure.

[0006] Optionally, the wind turbine generator set also includes a plurality of yaw reducers, which are arranged around the main frame and located on both sides inside the nacelle.

[0007] Optionally, the wind turbine generator set further includes a control cabinet, which is located inside the nacelle and on the side of the nacelle.

[0008] Optionally, the wind turbine generator set further includes a cooling fan, which is disposed on the top of the main frame and is used to dissipate heat from the generator.

[0009] Optionally, the air inlet of the cooling fan is connected to a first air duct, which is arranged along the inner wall of the engine compartment and connected to the outside of the engine compartment. The air outlet of the cooling fan is connected to a second air duct, which is connected to the generator.

[0010] Optionally, the floor of the nacelle is provided with a personnel shuttle passage, which is surrounded by the main frame; the wind turbine generator also includes a vertical ladder, which passes through the personnel shuttle passage and the top of the vertical ladder is connected to the main frame.

[0011] Optionally, the wind turbine generator set further includes an auxiliary frame, which is mounted on the bottom plate of the nacelle and located at the end of the nacelle away from the generator.

[0012] Optionally, the wind turbine generator set also includes a weather rack, part of which is located outside the nacelle and part of which is located on the top wall inside the nacelle.

[0013] Optionally, the hub is provided with a pitch bearing, a pitch ring gear, and a reducer. The pitch bearing and the pitch ring gear are used to connect with the blades mounted on the hub. The reducer meshes with the pitch ring gear and is used to drive the pitch ring gear to rotate, thereby causing the blades to rotate relative to the hub around their own axis.

[0014] Optionally, a pitch control unit is provided inside the hub, and the pitch control unit is electrically connected to the reducer.

[0015] The beneficial effects of the wind turbine generator set according to the embodiments of the present invention include, for example: This wind turbine generator set includes a nacelle, generator, hub, and main frame. The nacelle, generator, and hub are arranged sequentially, with the hub directly connected to the generator. The main frame is located inside the nacelle and connected to the generator. The main frame has a hollow structure. This direct-connection design eliminates the need for various transmission components found in existing technologies, resulting in a more compact component layout. Furthermore, the hollow design of the main frame allows for the internal placement of more components, further enhancing the compactness of the entire nacelle and increasing the operational space for the operators. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the wind turbine generator set provided in this embodiment.

[0018] Icons: 100-Wind turbine generator set; 10-Nacelle; 11-Yaw gearbox; 12-Control cabinet; 13-Cooling fan; 14-Vertical ladder; 15-Auxiliary frame; 20-Generator; 30-Hub; 31-Pitch bearing; 32-Pitch gear ring; 33-Gearbox; 34-Pitch cabinet; 35-Fairing; 40-Main frame; 50-Weather rack; 60-Tower. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0025] As described in the background section, with the rapid development of wind power technology, wind turbine generators have become an important component of the renewable energy sector. A wind turbine generator typically includes a rotor system, a generator, and a nacelle. The rotor system captures wind energy and converts it into mechanical energy, while the generator converts the mechanical energy into electrical energy. In existing technologies, the layout within the nacelle is inefficient, resulting in a cramped space and limited room for operator movement.

[0026] In view of this, please refer to Figure 1 This embodiment provides a wind turbine generator set 100, which can effectively improve the technical problems mentioned above. Its internal layout is reasonable, the components are compactly distributed, and the operator has a large space to move around.

[0027] For ease of understanding, Figure 1The wind turbine generator set 100 shown is devoid of blades and other structures, making it easier to see the internal structure. Please refer to Figure 1 The wind turbine generator set 100 includes a nacelle 10, a generator 20, a hub 30, and a main frame 40. The nacelle 10, generator 20, and hub 30 are arranged in sequence. The hub 30 is directly connected to the generator 20. The main frame 40 is located inside the nacelle 10 and is connected to the generator 20. The main frame 40 has a hollow structure.

[0028] This direct-drive design eliminates many transmission components found in existing technologies, such as gearboxes, main shaft systems, and couplings. The blades, hub 30, and generator 20 are directly connected, simplifying the structure and shortening the transmission chain. Overall, this allows for a more compact distribution of components. Furthermore, the hollow design of the main frame 40 allows for the internal placement of more components, resulting in a more compact distribution of components throughout the engine compartment 10 and increasing the operational space for the operators.

[0029] In this embodiment, generator 20 adopts a permanent magnet low-speed generator, which allows the unit to operate at low speeds. The absence of high-speed rotating parts optimizes the unit's operating conditions, reduces noise, and further improves overall reliability. Utilizing permanent magnet excitation eliminates the need for an excitation system, reducing excitation losses. Generator 20 is maintenance-free, has a compact structure, and a reasonable load distribution, thereby improving its efficiency.

[0030] In this embodiment, the wind turbine generator set 100 also includes multiple yaw reducers 11, which are arranged around the main frame 40 and located on both sides inside the nacelle 10. Figure 1 In the middle, multiple yaw reducers 11 are divided into two groups and located on both sides of the main frame 40. This way, they do not occupy a large space in the cabin 10, and the space utilization of the cabin 10 can be further improved.

[0031] The wind turbine generator set 100 also includes a tower 60, the bottom of which is installed on the ground or seabed, and the top of which is connected to the nacelle 10. The nacelle 10 can be rotated relative to the tower 60 through the yaw reducer 11.

[0032] In this embodiment, the wind turbine generator set 100 also includes a control cabinet 12, which is located inside the nacelle 10 and on the side of the nacelle 10. This arrangement allows the control cabinet 12 to be easily operated by personnel and does not occupy much of the central space of the nacelle 10.

[0033] To effectively dissipate heat from the generator 20, in this embodiment, the wind turbine generator set 100 also includes a cooling fan 13, which is located on the top of the main frame 40 and is used to dissipate heat from the generator 20. The cooling fan 13 is positioned so as not to occupy the central space of the nacelle 10.

[0034] To introduce external cool air to dissipate heat from the generator 20, in this embodiment, the air inlet of the cooling fan 13 is connected to a first air duct, which is arranged along the inner wall of the nacelle 10 and connected to the outside of the nacelle 10. The air outlet of the cooling fan 13 is connected to a second air duct, which is connected to the generator 20. By arranging the first air duct along the inner wall of the nacelle 10, it can avoid occupying the central space of the nacelle 10.

[0035] In this embodiment, the bottom plate of the nacelle 10 is provided with a personnel shuttle passage, which is arranged around the main frame 40. The wind turbine generator set 100 also includes a vertical ladder 14, which passes through the personnel shuttle passage and whose top end is connected to the main frame 40. Understandably, the bottom end of the vertical ladder 14 extends into the tower 60, so that operators can enter through the bottom of the tower 60, climb up the vertical ladder 14 to the personnel shuttle passage, and then enter the central space of the nacelle 10 from inside the main frame 40. This layout design makes it essentially free of the central space of the nacelle 10.

[0036] To facilitate operations by personnel at the end of the nacelle 10, in this embodiment, the wind turbine generator set 100 also includes an auxiliary frame 15, which is mounted on the bottom plate of the nacelle 10 and located at the end of the nacelle 10 away from the generator 20.

[0037] In this embodiment, the wind turbine generator set 100 also includes a weather rack 50, with part of the weather rack 50 located outside the nacelle 10 and part of the weather rack 50 located on the top wall inside the nacelle 10. With this arrangement, the structure of the weather rack 50 located inside the nacelle 10 does not occupy the central space of the nacelle 10.

[0038] To achieve variable speed, variable pitch, and constant frequency control, resulting in superior performance at low wind speeds, the turbine has a more optimized power curve and a flexible connection to the power grid, reducing the impact on both the turbine and the grid. In this embodiment, the hub 30 is equipped with a pitch bearing 31, a pitch gear ring 32, and a reducer 33. The pitch bearing 31 and the pitch gear ring 32 are used to connect with the blades mounted on the hub 30. The reducer 33 meshes with the pitch gear ring 32 and drives the pitch gear ring 32 to rotate, thereby causing the blades to rotate relative to the hub 30 around their own axis.

[0039] In summary, the reducer 33 uses the pitch ring gear 32 to drive the blades to rotate around their own axis, and the pitch bearing 31 can reduce the wear of the blades when they rotate relative to the hub 30.

[0040] To facilitate control of the reducer 33, in this embodiment, a pitch control unit 34 is installed inside the hub 30, and the pitch control unit 34 is electrically connected to the reducer 33. Meanwhile, the entire hub 30 is fitted with a fairing 35, giving it a more streamlined appearance.

[0041] For low-temperature environments, the outer walls of the cabin 10 and the fairing 35, among other fiberglass components, are made of low-expansion resin with a coefficient of thermal expansion similar to that of fiberglass, mitigating the risk of cracking due to thermal expansion and contraction. Toughening agents are added to the material formulation to enhance the low-temperature mechanical toughness of the outer walls of the cabin 10 and the fairing 35. Alternatively, the outer walls of the cabin 10 and the fairing 35 can be made of fiberglass-reinforced epoxy resin, coated with an acrylic polyurethane UV-resistant coating to resist photo-oxidative aging, providing excellent low-temperature and thermal insulation properties, thus forming a thermal insulation and protective layer for the internal components of the cabin 10.

[0042] Generally, heaters can be installed inside the engine compartment 10, so that the heaters can be activated to heat the interior in low-temperature environments, enabling the unit to start up quickly in low-temperature conditions.

[0043] In summary, this invention provides a wind turbine generator set 100, which includes a nacelle 10, a generator 20, a hub 30, and a main frame 40. The nacelle 10, generator 20, and hub 30 are arranged sequentially, with the hub 30 directly connected to the generator 20. The main frame 40 is disposed within the nacelle 10 and connected to the generator 20. The main frame 40 has a hollow structure. This direct-connection design eliminates the need for various transmission components found in existing technologies, resulting in a more compact component distribution. Furthermore, the hollow design of the main frame 40 allows for the internal arrangement of more components, further enhancing the compactness of the components within the nacelle 10 and increasing the operational space for the operator.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A wind turbine generator system (100) characterized by, It includes a nacelle (10), a generator (20), a wheel hub (30), and a main frame (40). The nacelle (10), the generator (20), and the wheel hub (30) are arranged in sequence. The wheel hub (30) is directly connected to the generator (20). The main frame (40) is located inside the nacelle (10) and is connected to the generator (20). The main frame (40) is a hollow structure.

2. The wind power plant (100) according to claim 1, characterized in that The wind turbine generator set (100) also includes a plurality of yaw reducers (11) arranged around the main frame (40) and located on both sides inside the nacelle (10).

3. The wind power plant (100) according to claim 1, characterized in that The wind turbine generator set (100) also includes a control cabinet (12), which is located inside the nacelle (10) and on the side inside the nacelle (10).

4. The wind power plant (100) according to claim 1, characterized in that The wind turbine generator set (100) also includes a cooling fan (13), which is located on the top of the main frame (40) and is used to cool the generator (20).

5. The wind power plant (100) according to claim 4, characterized in that The air inlet of the cooling fan (13) is connected to a first air duct, which is arranged along the inner wall of the engine compartment (10) and connected to the outside of the engine compartment (10). The air outlet of the cooling fan (13) is connected to a second air duct, which is connected to the generator (20).

6. The wind power plant (100) according to claim 1, characterized in that The bottom plate of the nacelle (10) is provided with a personnel shuttle passage, which is surrounded by the main frame (40); the wind turbine generator set (100) also includes a vertical ladder (14), which passes through the personnel shuttle passage and the top of the vertical ladder (14) is connected to the main frame (40).

7. The wind power plant (100) according to claim 1, characterized in that The wind turbine generator set (100) also includes an auxiliary frame (15), which is disposed on the bottom plate of the nacelle (10) and located at the end of the nacelle (10) away from the generator (20).

8. The wind power plant (100) according to claim 1, characterized in that The wind turbine generator set (100) also includes a weather rack (50), part of which is located outside the nacelle (10) and part of which is located on the top wall inside the nacelle (10).

9. The wind power plant (100) according to claim 1, characterized in that The hub (30) is provided with a pitch bearing (31), a pitch gear ring (32) and a reducer (33). The pitch bearing (31) and the pitch gear ring (32) are used to connect with the blades mounted on the hub (30). The reducer (33) meshes with the pitch gear ring (32) and is used to drive the pitch gear ring (32) to rotate, thereby causing the blades to rotate relative to the hub (30) around their own axis.

10. The wind power plant (100) according to claim 9, characterized in that The hub (30) is equipped with a pitch control cabinet (34), which is electrically connected to the reducer (33).

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